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Sơn Tây Mint
''Toxicodendron succedaneum'', the wax tree, Japanese Hazenoki tree (Sumac or wax tree), sơn in Vietnamese or charão in Portuguese, is a flowering plant species in the genus ''Toxicodendron'' found in Asia, although it has been planted elsewhere, most notably Australia and New Zealand. It is a large shrub or tree, up to 8 m tall, somewhat similar to a sumac tree. Because of its beautiful autumn foliage, it has been planted outside Asia as an ornamental plant, often by gardeners who were apparently unaware of the dangers of allergic reactions. It is now officially classified as a noxious weed in Australia and New Zealand. It is one of the city tree symbols of Kurume, Fukuoka, Japan. The larvae of the moths '' Eteoryctis deversa'', '' Caloptilia aurifasciata'', ''Caloptilia protiella'', '' Caloptilia rhois'', and '' Callidrepana patrana'' feed on ''T. succedaneum''. Chemistry The plant produces hinokiflavone, a cytotoxic biflavonoid. Its stems are also a commercial source o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Köhler's Medicinal Plants
''Köhler's Medicinal Plants'' (or, ''Köhler's Medizinal-Pflanzen'') is a German herbal written principally by Hermann Adolph Köhler (1834–1879, physician and chemist), and edited after his death by Gustav Pabst. The work was first published in the late 19th century by Franz Eugen Köhler of Gera. Its complete title is . Publication history Originally, Köhler published the herbal in two volumes: the first in 1887, the second in 1890. Volume one is illustrated with 84 full-page, multi-colour plates, and volume two with 110. A third volume was added in 1898, entitled ''Neueste Medizinalpflanzen und Verwechslungen'', which is a supplement containing additions and corrections. Among the additions are 80 more colour plates. A fourth volume was announced by the publisher, but never released. All the colour plates in the herbal were produced through a process called ''chromolithography''. The botanical illustrators were Walther Otto Müller, Carl Friedrich Schmidt (artist), C. F. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Biodiesel
Biodiesel is a renewable biofuel, a form of diesel fuel, derived from biological sources like vegetable oils, animal fats, or recycled greases, and consisting of long-chain fatty acid esters. It is typically made from fats. The roots of biodiesel as a fuel source can be traced back to when J. Patrick and E. Duffy first conducted transesterification of vegetable oil in 1853, predating Rudolf Diesel's development of the diesel engine. Diesel's engine, initially designed for mineral oil, successfully ran on peanut oil at the 1900 Paris Exposition. This landmark event highlighted the potential of vegetable oils as an alternative fuel source. The interest in using vegetable oils as fuels resurfaced periodically, particularly during resource-constrained periods such as World War II. However, challenges such as high viscosity and resultant engine deposits were significant hurdles. The modern form of biodiesel emerged in the 1930s, when a method was found for transforming vegetable ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solvent
A solvent (from the Latin language, Latin ''wikt:solvo#Latin, solvō'', "loosen, untie, solve") is a substance that dissolves a solute, resulting in a Solution (chemistry), solution. A solvent is usually a liquid but can also be a solid, a gas, or a supercritical fluid. Water is a solvent for Chemical polarity#Polarity of molecules, polar molecules, and the most common solvent used by living things; all the ions and proteins in a Cell (biology), cell are dissolved in water within the cell. Major uses of solvents are in paints, paint removers, inks, and dry cleaning. Specific uses for Organic compound, organic solvents are in dry cleaning (e.g. tetrachloroethylene); as paint thinners (toluene, turpentine); as nail polish removers and solvents of glue (acetone, methyl acetate, ethyl acetate); in spot removers (hexane, petrol ether); in detergents (D-limonene, citrus terpenes); and in perfumes (ethanol). Solvents find various applications in chemical, pharmaceutical, oil, and gas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japanic Acid
Japanic acid or heneicosanedioic acid is a chemical compound with the chemical formula . The compound is a long-chain dicarboxylic acid, one of the longest naturally occurring dicarboxylic acids. Initially, it was extracted from natural fat called Japan wax. Discovery Japanic acid was first isolated by Eberhardt in 1888 by fractional distillation under vacuum. Since the natural raw material from which the acid is obtained was the dried juice of some species of acacia trees ( catechu), called "Japanese dirt", and the acid was called Japanic. Physical properties Like other long-chain dicarboxylic acids, it demonstrates physical properties typical of fatty acids with extended carbon backbones, including high melting points and limited water solubility. Japanic acid melts at a temperature of 117.5–117.9 °C. When heated to 200 °C, it begins to decompose with the release of and the formation of ketone . The acid and its salts are colored in various shades of brown. The acid is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Olein
Triolein (glyceryl trioleate) is a symmetrical triglyceride derived from glycerol and three units of the unsaturated fatty acid oleic acid. Most triglycerides are unsymmetrical, being derived from mixtures of fatty acids. Triolein represents 4–30% of olive oil. Triolein is also known as glyceryl trioleate and is one of the two components of Lorenzo's oil ''Lorenzo's Oil'' is a 1992 drama film directed and co-written by George Miller. It is based on the true story of Augusto and Michaela Odone, parents who search for a cure for their son Lorenzo's adrenoleukodystrophy (ALD), leading to the d .... The oxidation of triolein is according to the formula: : + 80 → 57 + 52 This gives a respiratory quotient of 57/80 or 0.7125. The heat of combustion is per mole or per gram. Per mole of oxygen it is . References Triglycerides {{ester-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stearin
Stearin , or tristearin, or glyceryl tristearate is an odourless, white powder. It is a triglyceride derived from three units of stearic acid. Most triglycerides are derived from at least two and more commonly three different fatty acids. Like other triglycerides, stearin can crystallise in three polymorphs. For stearin, these melt at 54 (α-form), 65, and (β-form). Note that stearin is also used to mean the solid component of an oil or fat that can be separated into components that melt at higher (the stearin) and lower (the olein) temperatures. This is the usage meant in an example such as palm stearin. Occurrence Stearin is obtained from animal fats created as a byproduct of processing beef. It can also be found in tropical plants such as palm. It can be partially purified by dry fractionation by pressing tallow or other fatty mixtures, leading to separation of the higher melting stearin-rich material from the liquid, which is typically enriched in fats derived from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Palmitin
Tripalmitin is a triglyceride derived from the fatty acid palmitic acid Palmitic acid (hexadecanoic acid in IUPAC nomenclature) is a fatty acid with a 16-carbon chain. It is the most common saturated fatty acid found in animals, plants and microorganisms.Gunstone, F. D., John L. Harwood, and Albert J. Dijkstra. The .... References Triglycerides Palmitate esters {{ester-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japan Wax
Japan wax (木蝋 ''Mokurō''), also known as sumac wax, sumach wax, vegetable wax, China green tallow, and Japan tallow, is a pale-yellow, waxy, water-insoluble solid with a gummy feel, obtained from the berries of certain sumacs native to Japan and China, such as ''Toxicodendron vernicifluum'' (lacquer tree) and '' Toxicodendron succedaneum'' (Japanese wax tree).Claude Leray "Waxes" in Kirk-othmer encyclopedia of chemical technology 2006, Wiley-VCH, Weinheim. Japan wax is a byproduct of lacquer manufacture. The fruits of the ''Toxicodendron'' trees are harvested, steamed, and pressed for the waxy substance which hardens when cool. It is not a true wax but a fat that contains 95% palmitin. Japan wax is sold in flat squares or disks and has a rancid odor. It is extracted by expression and heat, or by the action of solvents. Uses Japan wax is used in candles, furniture polishes, floor waxes, wax matches, soaps, food packaging, pharmaceuticals, cosmetics, pastels, crayons, buffi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lacquer Painting
Lacquer painting is a form of painting with lacquer which was practised in East Asia for decoration on lacquerware, and found its way to Europe and the Western World both via Persia and the Middle East and by direct contact with Continental Asia. The artistic form was revived and developed as a distinct genre of fine art painting by Vietnamese artists in the 1930s; the genre is known in Vietnamese as "sơn mài." Technique Making a lacquer painting may take several months depending on the technique used and the number of layers of lacquer. In Vietnam's ''sơn mài'' lacquer painting, a black board is prepared first. Then colour chalks are used on the prepared board for base sketch. Needles can also be used for carving the base sketch as an alternative. In lacquer painting, eggshells are used as white colour due to the lack of pure white colour in lacquer. Layers of clear varnish can be applied optionally depending on the purpose of the painting. Polishing is done in the end to reve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lacquer
Lacquer is a type of hard and usually shiny coating or finish applied to materials such as wood or metal. It is most often made from resin extracted from trees and waxes and has been in use since antiquity. Asian lacquerware, which may be called "true lacquer", are objects coated with the treated, dyed and dried sap of ''Toxicodendron vernicifluum'' or related trees, applied in several coats to a base that is usually wood. This dries to a very hard and smooth surface layer which is durable, waterproof, and attractive in feel and look. Asian lacquer is sometimes painted with pictures, inlaid with shell and other materials, or carved lacquer, carved, as well as maki-e, dusted with gold and given other further decorative treatments. In modern techniques, lacquer means a range of clear or pigmented coatings that dry by solvent evaporation to produce a hard, durable finish. The finish can be of any sheen level from ultra wikt:matte, matte to high Gloss (material appearance), glos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nature (journal)
''Nature'' is a British weekly scientific journal founded and based in London, England. As a multidisciplinary publication, ''Nature'' features Peer review, peer-reviewed research from a variety of academic disciplines, mainly in science and technology. It has core editorial offices across the United States, continental Europe, and Asia under the international scientific publishing company Springer Nature. ''Nature'' was one of the world's most cited scientific journals by the Science Edition of the 2022 ''Journal Citation Reports'' (with an ascribed impact factor of 50.5), making it one of the world's most-read and most prestigious academic journals. , it claimed an online readership of about three million unique readers per month. Founded in the autumn of 1869, ''Nature'' was first circulated by Norman Lockyer and Alexander MacMillan (publisher), Alexander MacMillan as a public forum for scientific innovations. The mid-20th century facilitated an editorial expansion for the j ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
