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Garcinia Benthamiana
''Garcinia benthamiana'', also known as asashi, is a flowering tree in the family Clusiaceae (Guttiferae). The specific epithet (''benthamiana'') honors English botanist George Bentham. Distribution ''Garcinia benthamiana'' is native to central Brazil, northern Peru, Guyana, Suriname, and French Guiana. Description Its petiolate leaves are elliptical to ovate in shape and measure in length and in width. The apex can be rounded, acute or acuminate, while the base is rounded to attenuate. It has fasciculate and axillary inflorescences, and the flowers have 15–25 stamens. The fruit has a verrucose epicarp and preeminent rostrum, with a smooth, elliptic seed. Its bark is rough and dark red-brown in color, sometimes covered in a green or white mold. It is a dioecious and evergreen tree. Chemistry Four xanthones, α-mangostin, β-mangostin, mangostenol, mangaxanthone B, three benzophenones, mangaphenone, benthamianone, congestiflorone, and one sterol, stigmaster ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Planch
A genre of the troubadours, the or (; "lament") is a funeral lament for "a great personage, a protector, a friend or relative, or a lady."Elisabeth Schulze-Busacker, "Topoi", in F. R. P. Akehurst and Judith M. Davis, eds., ''A Handbook of the Troubadours'' (Berkeley: University of California Press, 1995), pp. 421–440. Its main elements are expression of grief, praise of the deceased (eulogy) and prayer for his or her soul.Patricia Harris Stäblein, "New Views on an Old Problem: The Dynamics of Death in the ", ''Romance Philology'' 35, 1 (1981): 223–234. It is descended from the medieval Latin .William D. Paden, "Planh/Complainte", in W. W. Kibler and G. A. Zinn, eds., ''Medieval France: An Encyclopedia'' (New York: Garland, 1995), pp. 1400–1401. The is similar to the in that both were typically contrafacta. They made use of existing melodies, often imitating the original song even down to the rhymes. The most famous of all, however, Gaucelm Faidit's lament on the death ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stamens
The stamen (plural ''stamina'' or ''stamens'') is the pollen-producing reproductive organ of a flower. Collectively the stamens form the androecium., p. 10 Morphology and terminology A stamen typically consists of a stalk called the filament and an anther which contains ''microsporangia''. Most commonly anthers are two-lobed and are attached to the filament either at the base or in the middle area of the anther. The sterile tissue between the lobes is called the connective, an extension of the filament containing conducting strands. It can be seen as an extension on the dorsal side of the anther. A pollen grain develops from a microspore in the microsporangium and contains the male gametophyte. The stamens in a flower are collectively called the androecium. The androecium can consist of as few as one-half stamen (i.e. a single locule) as in '' Canna'' species or as many as 3,482 stamens which have been counted in the saguaro (''Carnegiea gigantea''). The androecium in vario ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sterol
Sterol is an organic compound with formula , whose molecule is derived from that of gonane by replacement of a hydrogen atom in position 3 by a hydroxyl group. It is therefore an alcohol of gonane. More generally, any compounds that contain the gonane structure, additional functional groups, and/or modified ring systems derived from gonane are called steroids. Therefore, sterols are a subgroup of the steroids. They occur naturally in most eukaryotes, including plants, animals, and fungi, and can also be produced by some bacteria (however likely with different functions). The most familiar type of animal sterol is cholesterol, which is vital to cell membrane structure, and functions as a precursor to fat-soluble vitamins and steroid hormones. While technically alcohols, sterols are classified by biochemists as lipids (fats in the broader sense of the term). Types Sterols of plants are called ''phytosterols'' and sterols of animals are called ''zoosterols''. The most importa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Benzophenones
Benzophenone is the organic compound with the formula (C6H5)2CO, generally abbreviated Ph2CO. It is a white solid that is soluble in organic solvents. Benzophenone is a widely used building block in organic chemistry, being the parent diarylketone. Uses Benzophenone can be used as a photo initiator in UV(Ultra-violet)-curing applications such as inks, imaging, and clear coatings in the printing industry. Benzophenone prevents ultraviolet ( UV) light from damaging scents and colors in products such as perfumes and soaps. Benzophenone can also be added to plastic packaging as a UV blocker to prevent photo-degradation of the packaging polymers or its contents. Its use allows manufacturers to package the product in clear glass or plastic (such as a PETE water bottle). Without it, opaque or dark packaging would be required. In biological applications, benzophenones have been used extensively as photophysical probes to identify and map peptide–protein interactions. Benzophenone ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Xanthones
Xanthone is an organic compound with the molecular formula O 6H4sub>2CO. It is a white solid. In 1939, xanthone was introduced as an insecticide and it currently finds uses as ovicide for codling moth eggs and as a larvicide. Xanthone is also used in the preparation of xanthydrol, which is used in the determination of urea levels in the blood. It can also be used as a photocatalyst. Synthesis Xanthone can be prepared by the heating of phenyl salicylate: Six methods have been reported for synthesizing xanthone derivatives: *The Michael-Kostanecki method uses an equimolar mix of a polyphenol and an ''O''-hydroxybenzoic acid, which are heated with a dehydrating agent. *The Friedel-Crafts method has a benzophenone intermediate. *The Robinson-Nishikawa method is a variant of the Hoesch synthesis but with low yields. *The Asahina-Tanase method synthesizes some methoxylated xanthones, and xanthones with acid-sensitive substituents. *The Tanase method is used to synthesize ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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