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Friday, December 21, 2007
Thursday, December 20, 2007
رجال ونساء يرغبن في زواج مسيار
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Wednesday, December 19, 2007
Flower Specialization and Pollination
Each flower has a specific design which best encourages the transfer of its pollen. Cleistogamous flowers are self pollinated, after which, they may or may not open. Many Viola and some Salvia species are known to have these types of flowers. Entomophilous flowers attract and use insects, bats, birds or other animals to transfer pollen from one flower to the next. Flowers commonly have glands called nectaries on their various parts that attract these animals. Some flowers have patterns, called nectar guides, that show pollinators where to look for nectar. Flowers also attract pollinators by scent and color. Still other flowers use mimicry to attract pollinators. Some species of orchids, for example, produce flowers resembling female bees in color, shape, and scent. Flowers are also specialized in shape and have an arrangement of the stamens that ensures that pollen grains are transferred to the bodies of the pollinator when it lands in search of its attractant (such as nectar, pollen, or a mate). In pursuing this attractant from many flowers of the same species, the pollinator transfers pollen to the stigmas—arranged with equally pointed precision—of all of the flowers it visits. Anemophilous flowers use the wind to move pollen from one flower to the next, examples include the grasses, Birch trees, Ragweed and Maples. They have no need to attract pollinators and therefore tend not to be "showy" flowers. Male and female reproductive organs are generally found in separate flowers, the male flowers having a number of long filaments terminating in exposed stamens, and the female flowers having long, feather-like stigmas. Whereas the pollen of entomophilous flowers tends to be large-grained, sticky, and rich in protein (another "reward" for pollinators), anemophilous flower pollen is usually small-grained, very light, and of little nutritional value to insects.
Morphology
The umbrella style flower of the Sarracenia genus.
Flowering plants are heterosporangiate, producing two types of reproductive spores. The pollen (male spores) and ovules (female spores) are produced in different organs, but the typical flower is a bisporangiate strobilus in that it contains both organs.
A flower is regarded as a modified stem with shortened internodes and bearing, at its nodes, structures that may be highly modified leaves.[1] In essence, a flower structure forms on a modified shoot or axis with an apical meristem that does not grow continuously (growth is determinate). Flowers may be attached to the plant in a few ways. If the flower has no stem but forms in the axil of a leaf, it is called sessile. When one flower is produced, the stem holding the flower is called a peduncle. If the peduncle ends with groups of flowers, each stem that holds a flower is called a pedicel. The flowering stem forms a terminal end which is called the torus or receptacle. The parts of a flower are arranged in whorls on the torus. The four main parts or whorls (starting from the base of the flower or lowest node and working upwards) are as follows:
An example of a perfect flower, this Crateva religiosa flower has both stamens (outer ring) and a pistil (center).
Calyx: the outer whorl of sepals; typically these are green, but are petal-like in some species.
Corolla: the whorl of petals, which are usually thin, soft and colored to attract insects that help the process of pollination.
Androecium (from Greek andros oikia: man's house): one or two whorls of stamens, each a filament topped by an anther where pollen is produced. Pollen contains the male gametes.
Gynoecium (from Greek gynaikos oikia: woman's house): one or more pistils. The female reproductive organ is the carpel: this contains an ovary with ovules (which contain female gametes). A pistil may consist of a number of carpels merged together, in which case there is only one pistil to each flower, or of a single individual carpel (the flower is then called apocarpous). The sticky tip of the pistil, the stigma, is the receptor of pollen. The supportive stalk, the style becomes the pathway for pollen tubes to grow from pollen grains adhering to the stigma, to the ovules, carrying the reproductive material.
Although the floral structure described above is considered the "typical" structural plan, plant species show a wide variety of modifications from this plan. These modifications have significance in the evolution of flowering plants and are used extensively by botanists to establish relationships among plant species. For example, the two subclasses of flowering plants may be distinguished by the number of floral organs in each whorl: dicotyledons typically having 4 or 5 organs (or a multiple of 4 or 5) in each whorl and monocotyledons having three or some multiple of three. The number of carpels in a compound pistil may be only two, or otherwise not related to the above generalization for monocots and dicots.
In the majority of species individual flowers have both pistils and stamens as described above. These flowers are described by botanists as being perfect, bisexual, or hermaphrodite. However, in some species of plants the flowers are imperfect or unisexual: having only either male (stamens) or female (pistil) parts. In the latter case, if an individual plant is either female or male the species is regarded as dioecious. However, where unisexual male and female flowers appear on the same plant, the species is considered monoecious.
Additional discussions on floral modifications from the basic plan are presented in the articles on each of the basic parts of the flower. In those species that have more than one flower on an axis—so-called composite flowers—the collection of flowers is termed an inflorescence; this term can also refer to the specific arrangements of flowers on a stem. In this regard, care must be exercised in considering what a ‘‘flower’’ is. In botanical terminology, a single daisy or sunflower for example, is not a flower but a flower head—an inflorescence composed of numerous tiny flowers (sometimes called florets). Each of these flowers may be anatomically as described above. Many flowers have a symmetry, if the perianth is bisected through the central axis from any point, symmetrical halves are produced—the flower is called regular or actinomorphic, e.g. rose or trillium. When flowers are bisected and produce only one line that produces symmetrical halves the flower is said to be irregular or zygomorphic. e.g. snapdragon or most orchids.
Floral formula
A floral formula is a way to represent the structure of a flower using specific letters, numbers, and symbols. Typically, a general formula will be used to represent the flower structure of a plant family rather than a particular species. The following representations are used:
Ca = calyx (sepal whorl; e.g. Ca5 = 5 sepals)Co = corolla (petal whorl; e.g., Co3(x) = petals some multiple of three ) Z = add if zygomorphic (e.g., CoZ6 = zygomorphic with 6 petals)A = androecium (whorl of stamens; e.g., A∞ = many stamens)G = gynoecium (carpel or carpels; e.g., G1 = monocarpous)
x: to represent a "variable number"∞: to represent "many"
A floral formula would appear something like this:
Ca5Co5A10 - ∞G1
Several additional symbols are sometimes used (see Key to Floral Formulas).
Pollination
Grains of pollen sticking to this bee will be transferred to the next flower it visits
Main article: pollination
The primary purpose of a flower is reproduction. Flowers are the reproductive organs and mediate the joining of the sperm contained within pollen to the ovules, normally from one plant to another but many plants also can pollinate there own flowers. The fertilized ovules produce seeds that are the next generation. Sexual reproduction produces genetically unique offspring, allowing for adaptation. Flowers have specific designs which encourages the transfer of pollen from one plant to another of the same species. Many plants are dependent upon external factors to move pollen between flowers, including the wind and animals, especially insects. Even large animals such as birds, bats, and pygmy possums can be employed. The period of time during which this process can take place (the flower is fully expanded and functional) is called anthesis.
Attraction methods
Bee orchid mimics a female bee in order to attract a male bee pollinator
Plants can not move from one location to another, thus many flowers have evolved to attract animals to transfer pollen between individuals in dispersed populations. Flowers that are insect-pollinated are called entomophilous; literally "insect-loving" in Latin. They can be highly modified along with the pollinating insects by co-evolution. Flowers commonly have glands called nectaries on various parts that attract animals looking for nutritious nectar. Birds and bees having color vision, enabling them to seek out "colorful" flowers. Some flowers have patterns, called nectar guides, that show pollinators where to look for nectar; they may be visible to us or only under ultraviolet light, which is visible to bees and some other insects. Flowers also attract pollinators by scent and some of those scents are pleasant to our sense of smell. Not all flower scents are appealing to humans, a number of flowers are pollinated by insects that are attracted to rotten flesh and have flowers that smell like dead animals, often called Carrion flowers including Rafflesia, the titan arum, and the North American pawpaw (Asimina triloba). Flowers pollinated by night visitors, including bats and moths, are likely to concentrate on scent to attract pollinators and most such flowers are white.
Still other flowers use mimicry to attract pollinators. Some species of orchids, for example, produce flowers resembling female bees in color, shape, and scent. Male bees move from one such flower to another in search of a mate.
Pollination mechanism
The pollination mechanism employed by a plant depends on what method of pollination is utilized.
Most flowers can be divided between two broad groups of pollination methods:
Entomophilous: flowers attract and use insects, bats, birds or other animals to transfer pollen from one flower to the next. Often they are specialized in shape and have an arrangement of the stamens that ensures that pollen grains are transferred to the bodies of the pollinator when it lands in search of its attractant (such as nectar, pollen, or a mate). In pursuing this attractant from many flowers of the same species, the pollinator transfers pollen to the stigmas—arranged with equally pointed precision—of all of the flowers it visits. Many flower rely on simple proximity between flower parts to ensure pollination. Others, such as the Sarracenia or lady-slipper orchids, have elaborate designs to ensure pollination while preventing self-pollination.
Anemophilous: flowers use the wind to move pollen from one flower to the next, examples include the grasses, Birch trees, Ragweed and Maples. They have no need to attract pollinators and therefore tend not to be "showy" flowers. Whereas the pollen of entomophilous flowers tends to be large-grained, sticky, and rich in protein (another "reward" for pollinators), anemophilous flower pollen is usually small-grained, very light, and of little nutritional value to insects, though it may still be gathered in times of dearth. Honeybees and bumblebees actively gather anemophilous corn (maize) pollen, though it is of little value to them.
Some flowers are self pollinated and use flowers that never open or are self pollinated before the flowers open, these flowers are called cleistogamous. Many Viola species and some Salvia have these types of flowers.
Flower-pollinator relationships
Many flowers have close relationships with one or a few specific pollinating organisms. Many flowers, for example, attract only one specific species of insect, and therefore rely on that insect for successful reproduction. This close relationship is often given as an example of coevolution, as the flower and pollinator are thought to have developed together over a long period of time to match each other's needs.
This close relationship compounds the negative effects of extinction. The extinction of either member in such a relationship would mean almost certain extinction of the other member as well. Some endangered plant species are so because of shrinking pollinator populations.
Fertilization and dispersal
Main article: biological dispersal
In this picture you can clearly see the stamens of the flower
Some flowers with both stamens and a pistil are capable of self-fertilization, which does increase the chance of producing seeds but limits genetic variation. The extreme case of self-fertilization occurs in flowers that always self-fertilize, such as many dandelions. Conversely, many species of plants have ways of preventing self-fertilization. Unisexual male and female flowers on the same plant may not appear or mature at the same time, or pollen from the same plant may be incapable of fertilizing its ovules. The latter flower types, which have chemical barriers to their own pollen, are referred to as self-sterile or self-incompatible (see also: Plant sexuality).
Evolution
Flowers in Kamakura, Japan
While land plants have existed for about 425 million years, the first ones reproduced by a simple adaptation of their aquatic counterparts: spores. In the sea, plants -- and some animals -- can simply scatter out little living copies of themselves to float away and grow elsewhere. This is how early plants, such as the modern fern, are thought to have reproduced. But plants soon began protecting these copies to deal with drying out and other abuse which is even more likely on land than in the sea. The protection became the seed...but not, yet, flowers. Early seed-bearing plants include the ginkgo, conifers (like pines and fir trees). The earliest fossil of a flowering plant, Archaefructus liaoningensis, is dated about 125 million years old.[2] Several groups of extinct gymnosperms, particularly seed ferns, have been proposed as the ancestors of flowering plants but there is no continuous fossil evidence showing exactly how flowers evolved. The apparently sudden appearance of relatively modern flowers in the fossil record posed such a problem for the theory of evolution that it was called an "abominable mystery" by Charles Darwin. Recently discovered angiosperm fossils such as Archaefructus, along with further discoveries of fossil gymnosperms, suggest how angiosperm characteristics may have been acquired in a series of steps.
Recent DNA analysis (molecular systematics)[3][4] show that Amborella trichopoda, found on the Pacific island of New Caledonia, is the sister group to the rest of the flowering plants, and morphological studies[5] suggest that it has features which may have been characteristic of the earliest flowering plants.
Various flower colors and shapes
A Syrphid fly on a Grape hyacinth
The general assumption is that the function of flowers, from the start, was to involve other animals in the reproduction process. Pollen can be scattered without bright colors and obvious shapes, which would therefore be a liability, using the plant's resources, unless they provide some other benefit. One proposed reason for the sudden, fully developed appearance of flowers is that they evolved in an isolated setting like an island, or chain of islands, where the plants bearing them were able to develop a highly specialized relationship with some specific animal (a wasp, for example), the way many island species develop today. This symbiotic relationship, with a hypothetical wasp bearing pollen from one plant to another much the way fig wasps do today, could have eventually resulted in both the plant(s) and their partners developing a high degree of specialization. Island genetics is believed to be a common source of speciation, especially when it comes to radical adaptations which seem to have required inferior transitional forms. Note that the wasp example is not incidental; bees, apparently evolved specifically for symbiotic plant relationships, are descended from wasps.
Likewise, most fruit used in plant reproduction comes from the enlargement of parts of the flower. This fruit is frequently a tool which depends upon animals wishing to eat it, and thus scattering the seeds it contains.
While many such symbiotic relationships remain too fragile to survive competition with mainland animals and spread, flowers proved to be an unusually effective means of production, spreading (whatever their actual origin) to become the dominant form of land plant life.
While there is only hard proof of such flowers existing about 130 million years ago, there is some circumstantial evidence that they did exist up to 250 million years ago. A chemical used by plants to defend their flowers, oleanane, has been detected in fossil plants that old, including gigantopterids[6], which evolved at that time and bear many of the traits of modern, flowering plants, though they are not known to be flowering plants themselves, because only their stems and prickles have been found preserved in detail; one of the earliest examples of petrification.
The similarity in leaf and stem structure can be very important, because flowers are genetically just an adaptation of normal leaf and stem components on plants, a combination of genes normally responsible for forming new shoots.[7] The most primitive flowers are thought to have had a variable number of flower parts, often separate from (but in contact with) each other. The flowers would have tended to grow in a spiral pattern, to be bisexual (in plants, this means both male and female parts on the same flower), and to be dominated by the ovary (female part). As flowers grew more advanced, some variations developed parts fused together, with a much more specific number and design, and with either specific sexes per flower or plant, or at least "ovary inferior".
Flower evolution continues to the present day; modern flowers have been so profoundly influenced by humans that many of them cannot be pollinated in nature. Many modern, domesticated flowers used to be simple weeds, which only sprouted when the ground was disturbed. Some of them tended to grow with human crops, and the prettiest did not get plucked because of their beauty, developing a dependence upon and special adaptation to human affection.[8]
Development
The molecular control of floral organ identity determination is fairly well understood. In a simple model, three gene activities interact in a combinatorial manner to determine the developmental identities of the organ primordia within the floral meristem. These gene functions are called A, B and C-gene functions. In the first floral whorl only A-genes are expressed, leading to the formation of sepals. In the second whorl both A- and B-genes are expressed, leading to the formation of petals. In the third whorl, B and C genes interact to form stamens and in the center of the flower C-genes alone give rise to carpels. The model is based upon studies of homeotic mutants in Arabidopsis thaliana and snapdragon, Antirrhinum majus. For example, when there is a loss of B-gene function, mutant flowers are produced with sepals in the first whorl as usual, but also in the second whorl instead of the normal petal formation. In the third whorl the lack of B function but presence of C-function mimics the fourth whorl, leading to the formation of carpels also in the third whorl. See also The ABC Model of Flower Development.
Most genes central in this model belong to the MADS-box genes and are transcription factors that regulate the expression of the genes specific for each floral organ.
Flowering transition
The transition to flowering is one of the major phase changes that a plant makes during its life cycle. The transition must take place at a time that will ensure maximal reproductive success. To meet these needs a plant is able to interpret important endogenous and environmental cues such as changes in plant hormones levels and seasonable temperature and photoperiodchanges. Many perennial and most biennial plants require vernalization to flower. The molecular interpretation of these signals through genes such as CONSTANS and FLC ensures that flowering occurs at a time that is favorable for fertilization and the formation of seeds.[9] Flower formation is initiated at the ends of stems, and involves a number of different physiological and morphological changes. The first step is the transformation of the vegetative stem primordia into floral primordia. This occurs as biochemical changes take place to change cellular differentiation of leaf, bud and stem tissues into tissue that will grow into the reproductive organs. Growth of the central part of the stem tip stops or flattens out and the sides develop protuberances in a whorled or spiral fashion around the outside of the stem end. These protuberances develop into the sepals, petals, stamens, and carpels. Once this process begins, in most plants, it cannot be reversed and the stems develop flowers, even if the initial start of the flower formation event was dependent of some environmental cue. Once the process begins, even if that cue is removed the stem will continue to develop a flower.
Symbolism
Lilies are often used to denote life or resurrection
Flowers inspire decorative motives
Many flowers have important symbolic meanings in Western culture. The practice of assigning meanings to flowers is known as floriography. Some of the more common examples include:
Red roses are given as a symbol of love, beauty, and passion.
Poppies are a symbol of consolation in time of death. In the UK, Australia and Canada, red poppies are worn to commemorate soldiers who have died in times of war.
Irises/Lily are used in burials as a symbol referring to "resurrection/life". It is also associated with stars (sun) and its petals blooming/shining.
Daisies are a symbol of innocence.
Flowers within art are also representative of the female genitalia, as seen in the works of artists such as Georgia O'Keefe, Imogen Cunningham, Veronica Ruiz de Velasco, and Judy Chicago, and in fact in Asian and western classical art.
Flowers are common subjects of still lifes, such as this one by Ambrosius Bosschaert the Elder
The great variety of delicate and beautiful flowers has inspired the works of numerous poets, especially from the 18th-19th century Romantic era. Famous examples include William Wordsworth's I Wandered Lonely as a Cloud and William Blake's Ah! Sun-Flower.
Because of their varied and colorful appearance, flowers have long been a favorite subject of visual artists as well. Some of the most celebrated paintings from well-known painters are of flowers, such as Van Gogh's sunflowers series or Monet's water lilies. Flowers are also dried, freeze dried and pressed in order to create permanent, three-dimensional pieces of flower art.
The Roman goddess of flowers, gardens, and the season of Spring is Flora. The Greek goddess of spring, flowers and nature is Chloris.
Chinese Jade ornament with flower design, Jin Dynasty (1115-1234 AD), Shanghai Museum.
In Hindu mythology, flowers have a significant status. Vishnu, one of the three major gods in the Hindu system, is often depicted standing straight on a lotus flower.[10] Apart from the association with Vishnu, the Hindu tradition also considers the lotus to have spiritual significance.[11] For example, it figures in the Hindu stories of creation.[12]
Usage
Flowers are beloved for their various fragrances
In modern times, people have sought ways to cultivate, buy, wear, or otherwise be around flowers and blooming plants, partly because of their agreeable appearance and smell. Around the world, people use flowers for a wide range of events and functions that, cumulatively, encompass one's lifetime:
For new births or Christenings
As a corsage or boutonniere to be worn at social functions or for holidays
As tokens of love or esteem
For wedding flowers for the bridal party, and decorations for the hall
As brightening decorations within the home
As a gift of remembrance for bon voyage parties, welcome home parties, and "thinking of you" gifts
For funeral flowers and expressions of sympathy for the grieving
People therefore grow flowers around their homes, dedicate entire parts of their living space to flower gardens, pick wildflowers, or buy flowers from florists who depend on an entire network of commercial growers and shippers to support their trade.
Flowers provide less food than other major plants parts (seeds, fruits, roots, stems and leaves) but they provide several important foods and spices. Flower vegetables include broccoli, cauliflower and artichoke. The most expensive spice, saffron, consists of dried stigmas of a crocus. Other flower spices are cloves and capers. Hops flowers are used to flavor beer. Marigold flowers are fed to chickens to give their egg yolks a golden yellow color, which consumers find more desirable. Dandelion flowers are often made into wine. Bee Pollen, pollen collected from bees, is considered a health food by some people. Honey consists of bee-processed flower nectar and is often named for the type of flower, e.g. orange blossom honey, clover honey and tupelo honey.
Hundreds of fresh flowers are edible but few are widely marketed as food. They are often used to add color and flavor to salads. Squash flowers are dipped in breadcrumbs and fried. Edible flowers include nasturtium, chrysanthemum, carnation, cattail, honeysuckle, chicory, cornflower, Canna, and sunflower. Some edible flowers are sometimes candied such as daisy and rose (you may also come across a candied pansy).
Flowers can also be made into herbal teas. Dried flowers such as chrysanthemum, rose, jasmine, camomile are infused into tea both for their fragrance and medical properties. Sometimes, they are also mixed with tea leaves for the added fragrance.
See also
Morphology
The umbrella style flower of the Sarracenia genus.
Flowering plants are heterosporangiate, producing two types of reproductive spores. The pollen (male spores) and ovules (female spores) are produced in different organs, but the typical flower is a bisporangiate strobilus in that it contains both organs.
A flower is regarded as a modified stem with shortened internodes and bearing, at its nodes, structures that may be highly modified leaves.[1] In essence, a flower structure forms on a modified shoot or axis with an apical meristem that does not grow continuously (growth is determinate). Flowers may be attached to the plant in a few ways. If the flower has no stem but forms in the axil of a leaf, it is called sessile. When one flower is produced, the stem holding the flower is called a peduncle. If the peduncle ends with groups of flowers, each stem that holds a flower is called a pedicel. The flowering stem forms a terminal end which is called the torus or receptacle. The parts of a flower are arranged in whorls on the torus. The four main parts or whorls (starting from the base of the flower or lowest node and working upwards) are as follows:
An example of a perfect flower, this Crateva religiosa flower has both stamens (outer ring) and a pistil (center).
Calyx: the outer whorl of sepals; typically these are green, but are petal-like in some species.
Corolla: the whorl of petals, which are usually thin, soft and colored to attract insects that help the process of pollination.
Androecium (from Greek andros oikia: man's house): one or two whorls of stamens, each a filament topped by an anther where pollen is produced. Pollen contains the male gametes.
Gynoecium (from Greek gynaikos oikia: woman's house): one or more pistils. The female reproductive organ is the carpel: this contains an ovary with ovules (which contain female gametes). A pistil may consist of a number of carpels merged together, in which case there is only one pistil to each flower, or of a single individual carpel (the flower is then called apocarpous). The sticky tip of the pistil, the stigma, is the receptor of pollen. The supportive stalk, the style becomes the pathway for pollen tubes to grow from pollen grains adhering to the stigma, to the ovules, carrying the reproductive material.
Although the floral structure described above is considered the "typical" structural plan, plant species show a wide variety of modifications from this plan. These modifications have significance in the evolution of flowering plants and are used extensively by botanists to establish relationships among plant species. For example, the two subclasses of flowering plants may be distinguished by the number of floral organs in each whorl: dicotyledons typically having 4 or 5 organs (or a multiple of 4 or 5) in each whorl and monocotyledons having three or some multiple of three. The number of carpels in a compound pistil may be only two, or otherwise not related to the above generalization for monocots and dicots.
In the majority of species individual flowers have both pistils and stamens as described above. These flowers are described by botanists as being perfect, bisexual, or hermaphrodite. However, in some species of plants the flowers are imperfect or unisexual: having only either male (stamens) or female (pistil) parts. In the latter case, if an individual plant is either female or male the species is regarded as dioecious. However, where unisexual male and female flowers appear on the same plant, the species is considered monoecious.
Additional discussions on floral modifications from the basic plan are presented in the articles on each of the basic parts of the flower. In those species that have more than one flower on an axis—so-called composite flowers—the collection of flowers is termed an inflorescence; this term can also refer to the specific arrangements of flowers on a stem. In this regard, care must be exercised in considering what a ‘‘flower’’ is. In botanical terminology, a single daisy or sunflower for example, is not a flower but a flower head—an inflorescence composed of numerous tiny flowers (sometimes called florets). Each of these flowers may be anatomically as described above. Many flowers have a symmetry, if the perianth is bisected through the central axis from any point, symmetrical halves are produced—the flower is called regular or actinomorphic, e.g. rose or trillium. When flowers are bisected and produce only one line that produces symmetrical halves the flower is said to be irregular or zygomorphic. e.g. snapdragon or most orchids.
Floral formula
A floral formula is a way to represent the structure of a flower using specific letters, numbers, and symbols. Typically, a general formula will be used to represent the flower structure of a plant family rather than a particular species. The following representations are used:
Ca = calyx (sepal whorl; e.g. Ca5 = 5 sepals)Co = corolla (petal whorl; e.g., Co3(x) = petals some multiple of three ) Z = add if zygomorphic (e.g., CoZ6 = zygomorphic with 6 petals)A = androecium (whorl of stamens; e.g., A∞ = many stamens)G = gynoecium (carpel or carpels; e.g., G1 = monocarpous)
x: to represent a "variable number"∞: to represent "many"
A floral formula would appear something like this:
Ca5Co5A10 - ∞G1
Several additional symbols are sometimes used (see Key to Floral Formulas).
Pollination
Grains of pollen sticking to this bee will be transferred to the next flower it visits
Main article: pollination
The primary purpose of a flower is reproduction. Flowers are the reproductive organs and mediate the joining of the sperm contained within pollen to the ovules, normally from one plant to another but many plants also can pollinate there own flowers. The fertilized ovules produce seeds that are the next generation. Sexual reproduction produces genetically unique offspring, allowing for adaptation. Flowers have specific designs which encourages the transfer of pollen from one plant to another of the same species. Many plants are dependent upon external factors to move pollen between flowers, including the wind and animals, especially insects. Even large animals such as birds, bats, and pygmy possums can be employed. The period of time during which this process can take place (the flower is fully expanded and functional) is called anthesis.
Attraction methods
Bee orchid mimics a female bee in order to attract a male bee pollinator
Plants can not move from one location to another, thus many flowers have evolved to attract animals to transfer pollen between individuals in dispersed populations. Flowers that are insect-pollinated are called entomophilous; literally "insect-loving" in Latin. They can be highly modified along with the pollinating insects by co-evolution. Flowers commonly have glands called nectaries on various parts that attract animals looking for nutritious nectar. Birds and bees having color vision, enabling them to seek out "colorful" flowers. Some flowers have patterns, called nectar guides, that show pollinators where to look for nectar; they may be visible to us or only under ultraviolet light, which is visible to bees and some other insects. Flowers also attract pollinators by scent and some of those scents are pleasant to our sense of smell. Not all flower scents are appealing to humans, a number of flowers are pollinated by insects that are attracted to rotten flesh and have flowers that smell like dead animals, often called Carrion flowers including Rafflesia, the titan arum, and the North American pawpaw (Asimina triloba). Flowers pollinated by night visitors, including bats and moths, are likely to concentrate on scent to attract pollinators and most such flowers are white.
Still other flowers use mimicry to attract pollinators. Some species of orchids, for example, produce flowers resembling female bees in color, shape, and scent. Male bees move from one such flower to another in search of a mate.
Pollination mechanism
The pollination mechanism employed by a plant depends on what method of pollination is utilized.
Most flowers can be divided between two broad groups of pollination methods:
Entomophilous: flowers attract and use insects, bats, birds or other animals to transfer pollen from one flower to the next. Often they are specialized in shape and have an arrangement of the stamens that ensures that pollen grains are transferred to the bodies of the pollinator when it lands in search of its attractant (such as nectar, pollen, or a mate). In pursuing this attractant from many flowers of the same species, the pollinator transfers pollen to the stigmas—arranged with equally pointed precision—of all of the flowers it visits. Many flower rely on simple proximity between flower parts to ensure pollination. Others, such as the Sarracenia or lady-slipper orchids, have elaborate designs to ensure pollination while preventing self-pollination.
Anemophilous: flowers use the wind to move pollen from one flower to the next, examples include the grasses, Birch trees, Ragweed and Maples. They have no need to attract pollinators and therefore tend not to be "showy" flowers. Whereas the pollen of entomophilous flowers tends to be large-grained, sticky, and rich in protein (another "reward" for pollinators), anemophilous flower pollen is usually small-grained, very light, and of little nutritional value to insects, though it may still be gathered in times of dearth. Honeybees and bumblebees actively gather anemophilous corn (maize) pollen, though it is of little value to them.
Some flowers are self pollinated and use flowers that never open or are self pollinated before the flowers open, these flowers are called cleistogamous. Many Viola species and some Salvia have these types of flowers.
Flower-pollinator relationships
Many flowers have close relationships with one or a few specific pollinating organisms. Many flowers, for example, attract only one specific species of insect, and therefore rely on that insect for successful reproduction. This close relationship is often given as an example of coevolution, as the flower and pollinator are thought to have developed together over a long period of time to match each other's needs.
This close relationship compounds the negative effects of extinction. The extinction of either member in such a relationship would mean almost certain extinction of the other member as well. Some endangered plant species are so because of shrinking pollinator populations.
Fertilization and dispersal
Main article: biological dispersal
In this picture you can clearly see the stamens of the flower
Some flowers with both stamens and a pistil are capable of self-fertilization, which does increase the chance of producing seeds but limits genetic variation. The extreme case of self-fertilization occurs in flowers that always self-fertilize, such as many dandelions. Conversely, many species of plants have ways of preventing self-fertilization. Unisexual male and female flowers on the same plant may not appear or mature at the same time, or pollen from the same plant may be incapable of fertilizing its ovules. The latter flower types, which have chemical barriers to their own pollen, are referred to as self-sterile or self-incompatible (see also: Plant sexuality).
Evolution
Flowers in Kamakura, Japan
While land plants have existed for about 425 million years, the first ones reproduced by a simple adaptation of their aquatic counterparts: spores. In the sea, plants -- and some animals -- can simply scatter out little living copies of themselves to float away and grow elsewhere. This is how early plants, such as the modern fern, are thought to have reproduced. But plants soon began protecting these copies to deal with drying out and other abuse which is even more likely on land than in the sea. The protection became the seed...but not, yet, flowers. Early seed-bearing plants include the ginkgo, conifers (like pines and fir trees). The earliest fossil of a flowering plant, Archaefructus liaoningensis, is dated about 125 million years old.[2] Several groups of extinct gymnosperms, particularly seed ferns, have been proposed as the ancestors of flowering plants but there is no continuous fossil evidence showing exactly how flowers evolved. The apparently sudden appearance of relatively modern flowers in the fossil record posed such a problem for the theory of evolution that it was called an "abominable mystery" by Charles Darwin. Recently discovered angiosperm fossils such as Archaefructus, along with further discoveries of fossil gymnosperms, suggest how angiosperm characteristics may have been acquired in a series of steps.
Recent DNA analysis (molecular systematics)[3][4] show that Amborella trichopoda, found on the Pacific island of New Caledonia, is the sister group to the rest of the flowering plants, and morphological studies[5] suggest that it has features which may have been characteristic of the earliest flowering plants.
Various flower colors and shapes
A Syrphid fly on a Grape hyacinth
The general assumption is that the function of flowers, from the start, was to involve other animals in the reproduction process. Pollen can be scattered without bright colors and obvious shapes, which would therefore be a liability, using the plant's resources, unless they provide some other benefit. One proposed reason for the sudden, fully developed appearance of flowers is that they evolved in an isolated setting like an island, or chain of islands, where the plants bearing them were able to develop a highly specialized relationship with some specific animal (a wasp, for example), the way many island species develop today. This symbiotic relationship, with a hypothetical wasp bearing pollen from one plant to another much the way fig wasps do today, could have eventually resulted in both the plant(s) and their partners developing a high degree of specialization. Island genetics is believed to be a common source of speciation, especially when it comes to radical adaptations which seem to have required inferior transitional forms. Note that the wasp example is not incidental; bees, apparently evolved specifically for symbiotic plant relationships, are descended from wasps.
Likewise, most fruit used in plant reproduction comes from the enlargement of parts of the flower. This fruit is frequently a tool which depends upon animals wishing to eat it, and thus scattering the seeds it contains.
While many such symbiotic relationships remain too fragile to survive competition with mainland animals and spread, flowers proved to be an unusually effective means of production, spreading (whatever their actual origin) to become the dominant form of land plant life.
While there is only hard proof of such flowers existing about 130 million years ago, there is some circumstantial evidence that they did exist up to 250 million years ago. A chemical used by plants to defend their flowers, oleanane, has been detected in fossil plants that old, including gigantopterids[6], which evolved at that time and bear many of the traits of modern, flowering plants, though they are not known to be flowering plants themselves, because only their stems and prickles have been found preserved in detail; one of the earliest examples of petrification.
The similarity in leaf and stem structure can be very important, because flowers are genetically just an adaptation of normal leaf and stem components on plants, a combination of genes normally responsible for forming new shoots.[7] The most primitive flowers are thought to have had a variable number of flower parts, often separate from (but in contact with) each other. The flowers would have tended to grow in a spiral pattern, to be bisexual (in plants, this means both male and female parts on the same flower), and to be dominated by the ovary (female part). As flowers grew more advanced, some variations developed parts fused together, with a much more specific number and design, and with either specific sexes per flower or plant, or at least "ovary inferior".
Flower evolution continues to the present day; modern flowers have been so profoundly influenced by humans that many of them cannot be pollinated in nature. Many modern, domesticated flowers used to be simple weeds, which only sprouted when the ground was disturbed. Some of them tended to grow with human crops, and the prettiest did not get plucked because of their beauty, developing a dependence upon and special adaptation to human affection.[8]
Development
The molecular control of floral organ identity determination is fairly well understood. In a simple model, three gene activities interact in a combinatorial manner to determine the developmental identities of the organ primordia within the floral meristem. These gene functions are called A, B and C-gene functions. In the first floral whorl only A-genes are expressed, leading to the formation of sepals. In the second whorl both A- and B-genes are expressed, leading to the formation of petals. In the third whorl, B and C genes interact to form stamens and in the center of the flower C-genes alone give rise to carpels. The model is based upon studies of homeotic mutants in Arabidopsis thaliana and snapdragon, Antirrhinum majus. For example, when there is a loss of B-gene function, mutant flowers are produced with sepals in the first whorl as usual, but also in the second whorl instead of the normal petal formation. In the third whorl the lack of B function but presence of C-function mimics the fourth whorl, leading to the formation of carpels also in the third whorl. See also The ABC Model of Flower Development.
Most genes central in this model belong to the MADS-box genes and are transcription factors that regulate the expression of the genes specific for each floral organ.
Flowering transition
The transition to flowering is one of the major phase changes that a plant makes during its life cycle. The transition must take place at a time that will ensure maximal reproductive success. To meet these needs a plant is able to interpret important endogenous and environmental cues such as changes in plant hormones levels and seasonable temperature and photoperiodchanges. Many perennial and most biennial plants require vernalization to flower. The molecular interpretation of these signals through genes such as CONSTANS and FLC ensures that flowering occurs at a time that is favorable for fertilization and the formation of seeds.[9] Flower formation is initiated at the ends of stems, and involves a number of different physiological and morphological changes. The first step is the transformation of the vegetative stem primordia into floral primordia. This occurs as biochemical changes take place to change cellular differentiation of leaf, bud and stem tissues into tissue that will grow into the reproductive organs. Growth of the central part of the stem tip stops or flattens out and the sides develop protuberances in a whorled or spiral fashion around the outside of the stem end. These protuberances develop into the sepals, petals, stamens, and carpels. Once this process begins, in most plants, it cannot be reversed and the stems develop flowers, even if the initial start of the flower formation event was dependent of some environmental cue. Once the process begins, even if that cue is removed the stem will continue to develop a flower.
Symbolism
Lilies are often used to denote life or resurrection
Flowers inspire decorative motives
Many flowers have important symbolic meanings in Western culture. The practice of assigning meanings to flowers is known as floriography. Some of the more common examples include:
Red roses are given as a symbol of love, beauty, and passion.
Poppies are a symbol of consolation in time of death. In the UK, Australia and Canada, red poppies are worn to commemorate soldiers who have died in times of war.
Irises/Lily are used in burials as a symbol referring to "resurrection/life". It is also associated with stars (sun) and its petals blooming/shining.
Daisies are a symbol of innocence.
Flowers within art are also representative of the female genitalia, as seen in the works of artists such as Georgia O'Keefe, Imogen Cunningham, Veronica Ruiz de Velasco, and Judy Chicago, and in fact in Asian and western classical art.
Flowers are common subjects of still lifes, such as this one by Ambrosius Bosschaert the Elder
The great variety of delicate and beautiful flowers has inspired the works of numerous poets, especially from the 18th-19th century Romantic era. Famous examples include William Wordsworth's I Wandered Lonely as a Cloud and William Blake's Ah! Sun-Flower.
Because of their varied and colorful appearance, flowers have long been a favorite subject of visual artists as well. Some of the most celebrated paintings from well-known painters are of flowers, such as Van Gogh's sunflowers series or Monet's water lilies. Flowers are also dried, freeze dried and pressed in order to create permanent, three-dimensional pieces of flower art.
The Roman goddess of flowers, gardens, and the season of Spring is Flora. The Greek goddess of spring, flowers and nature is Chloris.
Chinese Jade ornament with flower design, Jin Dynasty (1115-1234 AD), Shanghai Museum.
In Hindu mythology, flowers have a significant status. Vishnu, one of the three major gods in the Hindu system, is often depicted standing straight on a lotus flower.[10] Apart from the association with Vishnu, the Hindu tradition also considers the lotus to have spiritual significance.[11] For example, it figures in the Hindu stories of creation.[12]
Usage
Flowers are beloved for their various fragrances
In modern times, people have sought ways to cultivate, buy, wear, or otherwise be around flowers and blooming plants, partly because of their agreeable appearance and smell. Around the world, people use flowers for a wide range of events and functions that, cumulatively, encompass one's lifetime:
For new births or Christenings
As a corsage or boutonniere to be worn at social functions or for holidays
As tokens of love or esteem
For wedding flowers for the bridal party, and decorations for the hall
As brightening decorations within the home
As a gift of remembrance for bon voyage parties, welcome home parties, and "thinking of you" gifts
For funeral flowers and expressions of sympathy for the grieving
People therefore grow flowers around their homes, dedicate entire parts of their living space to flower gardens, pick wildflowers, or buy flowers from florists who depend on an entire network of commercial growers and shippers to support their trade.
Flowers provide less food than other major plants parts (seeds, fruits, roots, stems and leaves) but they provide several important foods and spices. Flower vegetables include broccoli, cauliflower and artichoke. The most expensive spice, saffron, consists of dried stigmas of a crocus. Other flower spices are cloves and capers. Hops flowers are used to flavor beer. Marigold flowers are fed to chickens to give their egg yolks a golden yellow color, which consumers find more desirable. Dandelion flowers are often made into wine. Bee Pollen, pollen collected from bees, is considered a health food by some people. Honey consists of bee-processed flower nectar and is often named for the type of flower, e.g. orange blossom honey, clover honey and tupelo honey.
Hundreds of fresh flowers are edible but few are widely marketed as food. They are often used to add color and flavor to salads. Squash flowers are dipped in breadcrumbs and fried. Edible flowers include nasturtium, chrysanthemum, carnation, cattail, honeysuckle, chicory, cornflower, Canna, and sunflower. Some edible flowers are sometimes candied such as daisy and rose (you may also come across a candied pansy).
Flowers can also be made into herbal teas. Dried flowers such as chrysanthemum, rose, jasmine, camomile are infused into tea both for their fragrance and medical properties. Sometimes, they are also mixed with tea leaves for the added fragrance.
See also
Japanese Food Restaurants
To say that the Japanese absolutely adore their food would be an understatement! Undoubtedly, Japanese restaurants have taken the world by storm and this can definitely be seen in the increasing number of Japanese food restaurants springing up everywhere, all over the world! Not that I've ever visited Japan, but a friend of mine once told me that Japan would be nothing without its culture and its culinary delights! Tell anyone that you are planning on visiting Hokkaido, and the first piece of advice you'll ever get is to try out the seafood there, or if you are planning on taking a trip to Osaka, then the Okonomiyaki is a must! From Sashimi and Sushi to Tempura or even Sukiyaki, Japan is definitely famous for its cuisine. With almost 200,000 bars and restaurants that caters to a particular region, Japan has an amazingly delightful variety of drinking and eating establishments for its people. With so many restaurants springing up every second day, a typical Japanese restaurant guide would be considered out of date and outmoded even before it gets published! So, here is just a humble introduction to what it is like to eat and drink in the Japanese style. In places like Tokyo, you could visit some of the best fine dining restaurants in the world – ranging from two, three and even four star! And then you would have the other (equally important yet more traditional) Japanese dining experiences! Japanese Food – The Ultimate Dining Experience! For all newcomers to the Japanese dining scene, 'Ryotei' is the most formal and traditional form of dining you'll experience in Japan. If you are already in Japan, look for the 'Izakaya', which is an informal pub-style of eating but is highly recommended. What's more, with the overwhelming, almost staggering amount of fast food joints out there, you'll find Japanese food at its best! Of course, no trip to Japan is perfect without trying out one of the deluxe-convenience stores, where you'll find anything and everything! The day-to-day life in the city of Tokyo generally revolves around the subway stations. So, you could probably try out some of the eateries that are located right outside, near or even inside these subway stations. Besides, the 'Yatai' or the street-side stalls are an excellent option for hungry travelers. Lastly, but probably the most exciting option of them all is the 'Kaiten Sushi' experience, which is the conveyor belt dining experience! With thousands of vending machines scattered all over Tokyo, some even provide soup and dessert options, you could probably have your very own picnic in a shady street corner. Japanese Restaurants at your Service! Years ago, Japanese restaurants solely catered to the locals. However, over the last couple of decades, there has been an incredible explosion in the number of Japanese restaurants all over the world! Expensive to say the least, Japanese restaurants are exotic and the cost of eating at one of these joints could range from an entire month's salary to something thats more reasonable. Undoubtedly, Japanese restaurants have now become places of immense fascination and you can visit a Japanese restaurant even in the States. The only problem is in finding a good Japanese restaurant. Finding an original, authentic Japanese restaurant in the States is like going in search for peace and harmony in the Middle East! Yes, finding the right Japanese restaurant can be very time consuming and requires lots of patience and of course – luck. But, if you are lucky enough to find a suitable restaurant, then the Japanese dining experience is like no other you have or will ever experience. Since finding the perfect Japanese restaurant is a task unto itself, you need to remember that once found, it is nothing like you have ever experienced before. With so many different types of restaurants out there, most of them specialize in their very own special little dishes. However, there is one major misconception that needs to be addressed right away, as it is very unfair to these great restaurants. Most people mistake Japanese restaurants for Chinese ones, and should be informed that the Japanese and Chinese cuisines are nothing alike. Not that I'm being discriminatory, but Chinese food doesn't stand a chance in front of its Japanese counterpart! Japanese food is the real thing, and if you haven't yet developed a taste for this type of cuisine, you better start doing now!
Coffee Roasting Equipment - Coffee Roasters
Every time you pass by that exclusive coffee shop, you needn’t feel forlorn because you do not have the time to step in and enjoy the delicious steaming cup of coffee! This is simply because, excellent coffee can be made in your own home from the very first step. Nothing can beat freshly brewed coffee that is prepared right in the comfort of one’s own home. So, if you are craving for some fresh coffee, you can find a coffee roaster that will enable you to have fresh coffee, anytime of the day.
So, what exactly is a Coffee Roaster?
A good coffee roaster helps you roast coffee beans within the confines of your home. Home roasting can be fun and really easy to do. Home coffee roasters are now a must have for most people. This enables you to control the flavor of the freshly roasted coffee as per your tastes. Firstly, you need to decide the kind of coffee beans you would require. Take a peek in to the regular coffee shops that also sell some varieties of the same. Then you need to decide the size of the coffee roaster. Coffee roasters use hot air to absorb moisture from the coffee beans until they become dry and toasty. Browse online to know the range available and the specifications.
Coffee roasting always produces a wonderful fragrance. Some methods enable you to roast on a porch or near an open window.
Tips for Home Coffee Roasting:
This is a fine skin that detaches from the bean once your roast is agitated called the chaff. The problem with chaff is that, if you do not employ ways to collect and contain it, you may have to end up cleaning the entire place.
Do not be afraid of crackling coffee beans. Pay great attention to the entire process and especially toward the end of the roasting of the coffee beans.
Try to be as organized as possible. Lay out all the kitchen items that you would require like spoons and bottles that you would cool the beans, before you begin to roast.
You can control the roast and make it more consistent if you install a 550-degree thermometer in the air popper.
It is important to mention here that coffee that is made from a roaster needs to be consumed immediately. This would enable you to savor the taste of freshly brewed coffee.
You can even go in for organic coffee. Its mild, nutty flavor is mainly because it has been grown and processed without any chemical interventions.
The Coffee Roasting Process:
The beans remain green for the first few minutes and they then turn into a lighter yellow color. Once the internal water content dissipates, you can hear the cracking sound. Do not get worried about this. This is when the real roasting starts to occur. This is because the sugar gets caramelized and the water in it escapes. The roasting is generally considered to be complete once you hear the first ‘crack’. You can look out for the fragrance that can give you a cue about the end of this process. Once the beans start expanding in size, the roast turns dark. Sometimes, tiny pieces of the beans are blown away with some more crackling sounds. Eventually, the coffee roasting breaks down the bean structure completely. This results in a cup of dark watery fluid.
Coffee roasting can be fun. Coffee Roasting Equipments are not the only things you can use to make fresh coffee. There are times, when ordinary items in the kitchen can serve the purpose. Generally people are known to also use a frying pan, a skillet, popcorn popper and wok as substitutes for home coffee roasters.
Once you have purchased your coffee roasting equipment, all you need to do is pop in some beans and roast away!
So, what exactly is a Coffee Roaster?
A good coffee roaster helps you roast coffee beans within the confines of your home. Home roasting can be fun and really easy to do. Home coffee roasters are now a must have for most people. This enables you to control the flavor of the freshly roasted coffee as per your tastes. Firstly, you need to decide the kind of coffee beans you would require. Take a peek in to the regular coffee shops that also sell some varieties of the same. Then you need to decide the size of the coffee roaster. Coffee roasters use hot air to absorb moisture from the coffee beans until they become dry and toasty. Browse online to know the range available and the specifications.
Coffee roasting always produces a wonderful fragrance. Some methods enable you to roast on a porch or near an open window.
Tips for Home Coffee Roasting:
This is a fine skin that detaches from the bean once your roast is agitated called the chaff. The problem with chaff is that, if you do not employ ways to collect and contain it, you may have to end up cleaning the entire place.
Do not be afraid of crackling coffee beans. Pay great attention to the entire process and especially toward the end of the roasting of the coffee beans.
Try to be as organized as possible. Lay out all the kitchen items that you would require like spoons and bottles that you would cool the beans, before you begin to roast.
You can control the roast and make it more consistent if you install a 550-degree thermometer in the air popper.
It is important to mention here that coffee that is made from a roaster needs to be consumed immediately. This would enable you to savor the taste of freshly brewed coffee.
You can even go in for organic coffee. Its mild, nutty flavor is mainly because it has been grown and processed without any chemical interventions.
The Coffee Roasting Process:
The beans remain green for the first few minutes and they then turn into a lighter yellow color. Once the internal water content dissipates, you can hear the cracking sound. Do not get worried about this. This is when the real roasting starts to occur. This is because the sugar gets caramelized and the water in it escapes. The roasting is generally considered to be complete once you hear the first ‘crack’. You can look out for the fragrance that can give you a cue about the end of this process. Once the beans start expanding in size, the roast turns dark. Sometimes, tiny pieces of the beans are blown away with some more crackling sounds. Eventually, the coffee roasting breaks down the bean structure completely. This results in a cup of dark watery fluid.
Coffee roasting can be fun. Coffee Roasting Equipments are not the only things you can use to make fresh coffee. There are times, when ordinary items in the kitchen can serve the purpose. Generally people are known to also use a frying pan, a skillet, popcorn popper and wok as substitutes for home coffee roasters.
Once you have purchased your coffee roasting equipment, all you need to do is pop in some beans and roast away!
Monday, December 17, 2007
قتل زوجته لفشله في فض غشاء بكارتها ليلية الدخلة وشكه فيها
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صورها بملابسها الداخلية لتكون عبرة لكل البناتhttp://www.arabzwaj.com/welcome/viewtopic.php?p=11918#11918
شرطي اغتصب ابن خالته داخل السيارةhttp://www.arabzwaj.com/welcome/viewtopic.php?p=11917#11917علاج نفسك بنفسك بالاعشاب والطب البديل قسم خاص بالعلاج بالاعشابhttp://www.arabzwaj.com/aashabيعاشر اخت زوجته القاصر ويوعدها بالزواجhttp://www.arabzwaj.com/welcome/viewtopic.php?p=11906#11906قتلت طفلها الرضيع ورمته في الصرف الصحي بمساعدة امهاوجدتهاhttp://www.arabzwaj.com/welcome/viewtopic.php?p=11907#11907اعتقال اكثر من 170فتاة في شبكة دعارة في دبيhttp://www.arabzwaj.com/welcome/viewtopic.php?p=11908#11908انتشار بيوت الدعارة في دبيhttp://www.arabzwaj.com/welcome/viewtopic.php?p=11909#11909اغتصب خطيبته مع7 من اصدقائه اكثر من 14مرةhttp://www.arabzwaj.com/welcome/viewtopic.php?p=11910#11910شاهد بالصور عقوية سارق الجوالhttp://www.arabzwaj.com/welcome/viewtopic.php?p=11911#11911
سعودي يواجه اتهاما بالاعتداء الجنسي على عمانية بكهف ثلجي في دبيhttp://www.arabzwaj.com/welcome/viewtopic.php?p=11835#11835متطرفون بسوريا يستهدفون مناطق حساسة للفتيات بحرقها بالأسيد
http://www.arabzwaj.com/welcome/viewtopic.php?p=11834#11834
عريس يكسر عظم زوجته ليلة فرحهما تنفيذا لامر والدتهhttp://www.arabzwaj.com/welcome/viewtopic.php?p=11836#11836لقبض على مصري مارس الفاحشة مع ابنته 4 سنوات بمعرفة والدتها
http://www.arabzwaj.com/welcome/viewtopic.php?p=11814#11814
مصري يستعين بشرطي و11 من أصدقائه لإغتصاب زوجته
http://www.arabzwaj.com/welcome/viewtopic.php?p=11832#11832
محكمة سعودية تأمر بحبس وجلد فتاة تعرضت لخطف واغتصاب جماعيhttp://www.arabzwaj.com/welcome/viewtopic.php?p=11833#11833
جندي امريكي انتحروا بسبب حرب العراقhttp://www.arabzwaj.com/welcome/viewtopic.php?p=11830#11830كيفيةاستخدم فرشاة الأسنان والخيط بشكل صحيح ( بالصور) http://www.arabzwaj.com/welcome/viewtopic.php?p=11823#11823المدينة الجامعية بدمشق تتحول من سكن لبناة المستقبل إلى وكر للدعارةhttp://www.arabzwaj.com/welcome/viewtopic.php?p=11815#11815أسرار الشفاء بالاعشاب الطبيعية للمصابين بالسكر.... http://www.arabzwaj.com/welcome/viewtopic.php?p=11826#11826
انتهاك عرض رجل مصري من رجال الشرطةhttp://www.arabzwaj.com/welcome/viewtopic.php?p=11816#11816فتى فرنسي اغتصبه 3 إماراتيين في دبي يواجه خطر الإصابة بالإيدزhttp://www.arabzwaj.com/welcome/viewtopic.php?p=11817#11817
انتقادات حادة لطبيب افتتح عيادة لعلاج الشذوذ الجنسي بالقاهرة والشواذ اتخذوها مكانا للتعارفhttp://www.arabzwaj.com/welcome/viewtopic.php?p=11811#11811الوليد بن طلال يشتري أكبر طائرة ركاب في العالم لاستخدامه الشخصي
http://www.arabzwaj.com/welcome/viewtopic.php?t=2508لماذا اطلق اسم ضرس العقل ؟ وكم عدد ضروس العقل ؟
صور لحديقة الحب في تايلاند .. مناظر رائعةhttp://www.arabzwaj.com/welcome/viewtopic.php?p=11813#11813
عقار أنتجته شركة سعودية لعلاج الصلع وتساقط الشعر يثير اهتمام العلماء في الغربhttp://www.arabzwaj.com/welcome/viewtopic.php?t=2499مشعوذ تونسي يخرج الجان من جسد النساء بالاعتداء الجنسيhttp://www.arabzwaj.com/welcome/viewtopic.php?t=2498القبض على فلسطيني في القاهرة حاول التحرش بنانسي عجرمhttp://www.arabzwaj.com/welcome/viewtopic.php?t=2497ملياردير مصري ينوي إطلاق فضائيتين لمواجهة تزايد المحجبات بالhttp://www.arabzwaj.com/welcome/viewtopic.php?t=2496
كويتي يضبط زوجته وعشيقها في فراشهhttp://www.arabzwaj.com/welcome/viewtopic.php?p=11726#11726
العروس شنقت نفسها بعد شهرين لتتخلص من جحيم حماتها
http://www.arabzwaj.com/welcome/viewtopic.php?p=11727#11727سكارى يقتحمون مسجدا بالكويت ويضربون من فيه واصابة 71 شخصاhttp://www.arabzwaj.com/welcome/viewtopic.php?p=11728#11728
بعد اغتصابها من قبل والدها أنجبت طفلاً وهي بالخامسة عشرة منhttp://www.arabzwaj.com/welcome/viewtopic.php?t=2491امرأة ماليزية تعاشر ضيف البيت على سبيل الخطأ ظنا منها أنه زوجهاhttp://www.arabzwaj.com/welcome/viewtopic.php?t=2489كويتى يستعين بأصدقائه ويعتدى جنسيا على نجلى شقيقهhttp://www.arabzwaj.com/welcome/viewtopic.php?t=2488سورى يستدرج فتاة سعودية ويغتصبها بالقوةhttp://www.arabzwaj.com/welcome/viewtopic.php?t=248765حماراً على موائد إفطار الصائمين في تونس http://www.arabzwaj.com/welcome/viewtopic.php?t=2486سعودي يغتصب سيدة في مشفى حكومي بالرياضhttp://www.arabzwaj.com/welcome/viewtopic.php?t=2490
20موقع جنسي + صور جنسية + افلام جنس http://www.arabzwaj.com/welcome/viewtopic.php?t=1956 اربع صور عارية000000 ؟ ؟ سارعوا قبل الحذف0
http://www.arabzwaj.com/welcome/viewtopic.php?t=686
مدير يغتصب سكرتيرته بالاتفاق مع موظفيه بعد ان خدروها http://www.arabzwaj.com/welcome/viewtopic.php?t=1873
فتاة تموت بسب قبلة http://www.arabzwaj.com/welcome/viewtopic.php?t=1892 انواع المكاوي بالصور http://www.arabzwaj.com/welcome/viewtopic.php?t=900 اب يغتصب ابته عشر سنوات كامله http://www.arabzwaj.com/welcome/viewtopic.php?t=1879
فتاه تموت في حمام المدرسه****
http://www.arabzwaj.com/welcome/viewtopic.php?t=1894 عرب زواج افضل موقع للتعارف من اجل الزواج الشرعي علي النت www.arabzwaj.com ismailia
صورها بملابسها الداخلية لتكون عبرة لكل البناتhttp://www.arabzwaj.com/welcome/viewtopic.php?p=11918#11918
شرطي اغتصب ابن خالته داخل السيارةhttp://www.arabzwaj.com/welcome/viewtopic.php?p=11917#11917علاج نفسك بنفسك بالاعشاب والطب البديل قسم خاص بالعلاج بالاعشابhttp://www.arabzwaj.com/aashabيعاشر اخت زوجته القاصر ويوعدها بالزواجhttp://www.arabzwaj.com/welcome/viewtopic.php?p=11906#11906قتلت طفلها الرضيع ورمته في الصرف الصحي بمساعدة امهاوجدتهاhttp://www.arabzwaj.com/welcome/viewtopic.php?p=11907#11907اعتقال اكثر من 170فتاة في شبكة دعارة في دبيhttp://www.arabzwaj.com/welcome/viewtopic.php?p=11908#11908انتشار بيوت الدعارة في دبيhttp://www.arabzwaj.com/welcome/viewtopic.php?p=11909#11909اغتصب خطيبته مع7 من اصدقائه اكثر من 14مرةhttp://www.arabzwaj.com/welcome/viewtopic.php?p=11910#11910شاهد بالصور عقوية سارق الجوالhttp://www.arabzwaj.com/welcome/viewtopic.php?p=11911#11911
سعودي يواجه اتهاما بالاعتداء الجنسي على عمانية بكهف ثلجي في دبيhttp://www.arabzwaj.com/welcome/viewtopic.php?p=11835#11835متطرفون بسوريا يستهدفون مناطق حساسة للفتيات بحرقها بالأسيد
http://www.arabzwaj.com/welcome/viewtopic.php?p=11834#11834
عريس يكسر عظم زوجته ليلة فرحهما تنفيذا لامر والدتهhttp://www.arabzwaj.com/welcome/viewtopic.php?p=11836#11836لقبض على مصري مارس الفاحشة مع ابنته 4 سنوات بمعرفة والدتها
http://www.arabzwaj.com/welcome/viewtopic.php?p=11814#11814
مصري يستعين بشرطي و11 من أصدقائه لإغتصاب زوجته
http://www.arabzwaj.com/welcome/viewtopic.php?p=11832#11832
محكمة سعودية تأمر بحبس وجلد فتاة تعرضت لخطف واغتصاب جماعيhttp://www.arabzwaj.com/welcome/viewtopic.php?p=11833#11833
جندي امريكي انتحروا بسبب حرب العراقhttp://www.arabzwaj.com/welcome/viewtopic.php?p=11830#11830كيفيةاستخدم فرشاة الأسنان والخيط بشكل صحيح ( بالصور) http://www.arabzwaj.com/welcome/viewtopic.php?p=11823#11823المدينة الجامعية بدمشق تتحول من سكن لبناة المستقبل إلى وكر للدعارةhttp://www.arabzwaj.com/welcome/viewtopic.php?p=11815#11815أسرار الشفاء بالاعشاب الطبيعية للمصابين بالسكر.... http://www.arabzwaj.com/welcome/viewtopic.php?p=11826#11826
انتهاك عرض رجل مصري من رجال الشرطةhttp://www.arabzwaj.com/welcome/viewtopic.php?p=11816#11816فتى فرنسي اغتصبه 3 إماراتيين في دبي يواجه خطر الإصابة بالإيدزhttp://www.arabzwaj.com/welcome/viewtopic.php?p=11817#11817
انتقادات حادة لطبيب افتتح عيادة لعلاج الشذوذ الجنسي بالقاهرة والشواذ اتخذوها مكانا للتعارفhttp://www.arabzwaj.com/welcome/viewtopic.php?p=11811#11811الوليد بن طلال يشتري أكبر طائرة ركاب في العالم لاستخدامه الشخصي
http://www.arabzwaj.com/welcome/viewtopic.php?t=2508لماذا اطلق اسم ضرس العقل ؟ وكم عدد ضروس العقل ؟
صور لحديقة الحب في تايلاند .. مناظر رائعةhttp://www.arabzwaj.com/welcome/viewtopic.php?p=11813#11813
عقار أنتجته شركة سعودية لعلاج الصلع وتساقط الشعر يثير اهتمام العلماء في الغربhttp://www.arabzwaj.com/welcome/viewtopic.php?t=2499مشعوذ تونسي يخرج الجان من جسد النساء بالاعتداء الجنسيhttp://www.arabzwaj.com/welcome/viewtopic.php?t=2498القبض على فلسطيني في القاهرة حاول التحرش بنانسي عجرمhttp://www.arabzwaj.com/welcome/viewtopic.php?t=2497ملياردير مصري ينوي إطلاق فضائيتين لمواجهة تزايد المحجبات بالhttp://www.arabzwaj.com/welcome/viewtopic.php?t=2496
كويتي يضبط زوجته وعشيقها في فراشهhttp://www.arabzwaj.com/welcome/viewtopic.php?p=11726#11726
العروس شنقت نفسها بعد شهرين لتتخلص من جحيم حماتها
http://www.arabzwaj.com/welcome/viewtopic.php?p=11727#11727سكارى يقتحمون مسجدا بالكويت ويضربون من فيه واصابة 71 شخصاhttp://www.arabzwaj.com/welcome/viewtopic.php?p=11728#11728
بعد اغتصابها من قبل والدها أنجبت طفلاً وهي بالخامسة عشرة منhttp://www.arabzwaj.com/welcome/viewtopic.php?t=2491امرأة ماليزية تعاشر ضيف البيت على سبيل الخطأ ظنا منها أنه زوجهاhttp://www.arabzwaj.com/welcome/viewtopic.php?t=2489كويتى يستعين بأصدقائه ويعتدى جنسيا على نجلى شقيقهhttp://www.arabzwaj.com/welcome/viewtopic.php?t=2488سورى يستدرج فتاة سعودية ويغتصبها بالقوةhttp://www.arabzwaj.com/welcome/viewtopic.php?t=248765حماراً على موائد إفطار الصائمين في تونس http://www.arabzwaj.com/welcome/viewtopic.php?t=2486سعودي يغتصب سيدة في مشفى حكومي بالرياضhttp://www.arabzwaj.com/welcome/viewtopic.php?t=2490
20موقع جنسي + صور جنسية + افلام جنس http://www.arabzwaj.com/welcome/viewtopic.php?t=1956 اربع صور عارية000000 ؟ ؟ سارعوا قبل الحذف0
http://www.arabzwaj.com/welcome/viewtopic.php?t=686
مدير يغتصب سكرتيرته بالاتفاق مع موظفيه بعد ان خدروها http://www.arabzwaj.com/welcome/viewtopic.php?t=1873
فتاة تموت بسب قبلة http://www.arabzwaj.com/welcome/viewtopic.php?t=1892 انواع المكاوي بالصور http://www.arabzwaj.com/welcome/viewtopic.php?t=900 اب يغتصب ابته عشر سنوات كامله http://www.arabzwaj.com/welcome/viewtopic.php?t=1879
فتاه تموت في حمام المدرسه****
http://www.arabzwaj.com/welcome/viewtopic.php?t=1894 عرب زواج افضل موقع للتعارف من اجل الزواج الشرعي علي النت www.arabzwaj.com ismailia
My PC Has Adware, What Should I Do?
I gotta tell ya, when I first got my computer when it was brand new, it worked like a charm! Then as I got a little bit more familiar with it, friends and family suggested I try some online applications. One was this cute purple ape that would help you surf the net.. or so I thought.
Turns out that damn application, along with a few others I installed, what were supposed to help increase my productivity, ended up doing exactly the opposite!
Sound familiar to you? Well, if so, then your not alone. Millions of computer users around the world have their PC’s infected with adware, and don’t even know it. What’s adware you say? Well, its any application that records what you do (or do not do) and reports that data back to third party vendors.
Now I know this sounds like covert ops stuff, but its really big business. See, the truth of the matter is these advertisers make a lot of money off of knowing your computer habits. Things like, where you go, what you do, how long your there, where you clicked, etc. Its kind of scary when you think about it.They come up with the applications that are usually disguised as innocent toolbars or programs that will show you the weather, etc. Once you install these things, they leach and lurk throughout your machine, slowing it down to no end.
They don’t care that you may have work to do, a report for school, or if your playing a game. Their job is to report back to their vendors what your doing, and how you do it. This way, these advertisers can come up with better targeted ads that will be used to get you to click on this link, or buy this product.
There is hope though, and it can return your computer back to you, the rightful owner. You can download to your PC some adware removal tools that will take out all of the know adware off your machine, and in the process, speed it up too.
It’s usually a quick download and install, and the applications are easy to use. Usually you let it scan your machine for a list of known offenders, and it does the rest, scouring your machine looking for them. When it does find any, it makes a list of what adware you have, what it does, and flags it for removal.
All you need to do then is say yes, and it takes them out fast. Then you just reboot your machine, and waalaa! Fast and fun computing just like your used to.
So there is light at the end of the tunnel for your PC. Now you know, so go get your PC scanned and cleaned today.
Turns out that damn application, along with a few others I installed, what were supposed to help increase my productivity, ended up doing exactly the opposite!
Sound familiar to you? Well, if so, then your not alone. Millions of computer users around the world have their PC’s infected with adware, and don’t even know it. What’s adware you say? Well, its any application that records what you do (or do not do) and reports that data back to third party vendors.
Now I know this sounds like covert ops stuff, but its really big business. See, the truth of the matter is these advertisers make a lot of money off of knowing your computer habits. Things like, where you go, what you do, how long your there, where you clicked, etc. Its kind of scary when you think about it.They come up with the applications that are usually disguised as innocent toolbars or programs that will show you the weather, etc. Once you install these things, they leach and lurk throughout your machine, slowing it down to no end.
They don’t care that you may have work to do, a report for school, or if your playing a game. Their job is to report back to their vendors what your doing, and how you do it. This way, these advertisers can come up with better targeted ads that will be used to get you to click on this link, or buy this product.
There is hope though, and it can return your computer back to you, the rightful owner. You can download to your PC some adware removal tools that will take out all of the know adware off your machine, and in the process, speed it up too.
It’s usually a quick download and install, and the applications are easy to use. Usually you let it scan your machine for a list of known offenders, and it does the rest, scouring your machine looking for them. When it does find any, it makes a list of what adware you have, what it does, and flags it for removal.
All you need to do then is say yes, and it takes them out fast. Then you just reboot your machine, and waalaa! Fast and fun computing just like your used to.
So there is light at the end of the tunnel for your PC. Now you know, so go get your PC scanned and cleaned today.
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