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Scheele's Green
Scheele's Green, also called Schloss Green, is chemically a cupric hydrogen arsenite (also called copper arsenite or acidic copper arsenite), . It is chemically related to Paris Green. Scheele's Green was invented in 1775 by Carl Wilhelm Scheele. By the end of the 19th century, it had virtually replaced the older green pigments based on copper carbonate. It is a yellowish-green pigment commonly used during the early to mid-19th century in paints as well as being directly incorporated into a variety of products as a colorant. It began to fall out of favor after the 1860s because of its toxicity and the instability of its color in the presence of sulfides and various chemical pollutants. The acutely toxic nature of Scheele's green as well as other arsenic-containing green pigments such as Paris Green may have contributed to the sharp decline in the popularity of the color green in late Victorian society. By the dawn of the 20th century, Scheele's green had completely fallen out o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scheele's Green
Scheele's Green, also called Schloss Green, is chemically a cupric hydrogen arsenite (also called copper arsenite or acidic copper arsenite), . It is chemically related to Paris Green. Scheele's Green was invented in 1775 by Carl Wilhelm Scheele. By the end of the 19th century, it had virtually replaced the older green pigments based on copper carbonate. It is a yellowish-green pigment commonly used during the early to mid-19th century in paints as well as being directly incorporated into a variety of products as a colorant. It began to fall out of favor after the 1860s because of its toxicity and the instability of its color in the presence of sulfides and various chemical pollutants. The acutely toxic nature of Scheele's green as well as other arsenic-containing green pigments such as Paris Green may have contributed to the sharp decline in the popularity of the color green in late Victorian society. By the dawn of the 20th century, Scheele's green had completely fallen out o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sulfur
Sulfur (or sulphur in British English) is a chemical element with the symbol S and atomic number 16. It is abundant, multivalent and nonmetallic. Under normal conditions, sulfur atoms form cyclic octatomic molecules with a chemical formula S8. Elemental sulfur is a bright yellow, crystalline solid at room temperature. Sulfur is the tenth most abundant element by mass in the universe and the fifth most on Earth. Though sometimes found in pure, native form, sulfur on Earth usually occurs as sulfide and sulfate minerals. Being abundant in native form, sulfur was known in ancient times, being mentioned for its uses in ancient India, ancient Greece, China, and ancient Egypt. Historically and in literature sulfur is also called brimstone, which means "burning stone". Today, almost all elemental sulfur is produced as a byproduct of removing sulfur-containing contaminants from natural gas and petroleum.. Downloahere The greatest commercial use of the element is the production o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scopulariopsis Brevicaulis
''Microascus brevicaulis'' is a microfungus in the Ascomycota. It is the teleomorph form of ''Scopulariopsis brevicaulis.'' ''Microascus brevicaulis'' occurs world-wide as a saprotroph in soil, a common agent of biodeterioration, an irregular plant pathogen, and an occasional agent of human nail infection. Name Most of the discussion of this fungus in the scientific and medical literature has referred to the fungus using the name of its asexual form, or anamorph, ''Scopulariopsis brevicaulis''. However, a sexual form (teleomorph) named ''Microascus brevicaulis'' was recently described. Under the current revision of ''International Code of Nomenclature for Algae, Fungi, and Plants'', as articulated in thShenzhen Code 2018 it remains unclear which name this fungus will ultimately take. Until further clarification, ''Microascus brevicaulis'' is considered the most recent, accepted name. Bartolomeo Gosio discovered in 1890 that under wet conditions ''M. brevicaulis'' produces s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trimethylarsine
Trimethylarsine (abbreviated TMA or TMAs) is the chemical compound with the formula (CH3)3As, commonly abbreviated As Me3 or TMAs. This organic derivative of arsine has been used as a source of arsenic in microelectronics industry, a building block to other organoarsenic compounds, and serves as a ligand in coordination chemistry. It has distinct "garlic"-like smell. Trimethylarsine had been discovered as early as 1854. Structure and preparation AsMe3 is a pyramidal molecule. The As-C distances average 1.519 Å, and the C-As-C angles are 91.83° Trimethylarsine can be prepared by treatment of arsenic oxide with trimethylaluminium: :As2O3 + 1.5 lMe3sub>2 → 2 AsMe3 + 3/n (MeAl-O)n Occurrence and reactions Trimethylarsine is the volatile byproduct of microbial action on inorganic forms of arsenic which are naturally occurring in rocks and soils at the parts-per-million level. Trimethylarsine has been reported only at trace levels (parts per billion) in landfill gas from Germany, C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bartolomeo Gosio
Bartolomeo Gosio (17 March 1863 – 13 April 1944) was an Italian medical scientist. He discovered a toxic fume, eponymously named "Gosio gas", which is produced by microorganisms, that killed many people. He identified the chemical nature of the gas as an arsenic compound (arsine), but incorrectly named it as diethylarsine. He also discovered an antibacterial compound called mycophenolic acid from the mould '' Penicillium brevicompactum''. He demonstrated that the novel compound was effective against the deadly anthrax bacterium, ''Bacillus anthracis''. This was the first antibiotic compound isolated in pure and crystallised form. Though the original compound was abandoned in clinical practice due to its adverse effects, its chemical derivative mycophenolate mofetil became the drug of choice as an immunosuppressant in kidney, heart, and liver transplantations. Biography Gosio was born in Magliano Alfieri, Piedmont, Italy. His father Giacomo Gosio, a veterinarian, died just when ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paecilomyces
''Paecilomyces'' is a genus of fungi. A number of species in this genus are plant pathogens. Several of the entomopathogenic species, such as "'' Paecilomyces fumosoroseus''" have now been placed in the genus ''Isaria'': in the order Hypocreales and family Cordycipitaceae. In 1974, R.A. Samson transferred the nematicidal species ''Paecilomyces lilacinus'' to this genus. However, publications in the 2000s (decade) indicated that the genus ''Paecilomyces'' was not monophyletic, and the new genus ''Purpureocillium'' was created to hold the taxon which includes ''P. lilacinum'': with both parts of the name referring to the purple conidia produced by the fungus. Species *'' Paecilomyces aegyptiacus'' *'' Paecilomyces aerugineus'' *'' Paecilomyces albus'' *'' Paecilomyces andoi'' *'' Paecilomyces antarcticus'' *''Paecilomyces aspergilloides'' *'' Paecilomyces atrovirens'' *'' Paecilomyces aureocinnamomeus'' *''Paecilomyces austriacus'' *''Paecilomyces baarnensis'' *''Paecilomyces b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scopulariopsis
''Scopulariopsis'' is a genus of teleomorph, anamorph and holomorph, anamorphic fungi that are saprobic and pathogenic to animals. The widespread genus contains 22 species. ''Scopulariopsis'' belongs to the group Hyphomycetes. These species are commonly found in soil, decaying wood, and various other plant and animal products. In indoor environment ''Scopulariopsis'' is found on dry walls, cellulose board, wallpaper, wood, and mattress dust. Species of ''Scopulariopsis'' have also been isolated from carpets, hospital floors, swimming pools, wooden food packing, shoes and wood pulp. ''Scopulariopsis'' species are sometimes encountered growing on meat in storage. Some of the common species are ''Scopulariopsis brevicaulis, S. brevicaulis'', ''Scopulariopsis brumptii, S. brumptii'', ''Scopulariopsis candida, S. candida'' and ''Scopulariopsis asperula, S. asperula''. References Sordariomycetes genera Microascales Taxa described in 1907 {{Microascales-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arsine
Arsine (IUPAC name: arsane) is an inorganic compound with the formula As H3. This flammable, pyrophoric, and highly toxic pnictogen hydride gas is one of the simplest compounds of arsenic. Despite its lethality, it finds some applications in the semiconductor industry and for the synthesis of organoarsenic compounds. The term ''arsine'' is commonly used to describe a class of organoarsenic compounds of the formula AsH3−xRx, where R = aryl or alkyl. For example, As(C6H5)3, called triphenylarsine, is referred to as "an arsine". General properties At its standard state, arsine is a colorless, denser-than-air gas that is slightly soluble in water (20% at 20 °C) and in many organic solvents as well. Whereas arsine itself is odorless, owing to its oxidation by air, it is possible to smell a slight garlic or fish-like scent when the compound is present above 0.5 ppm. This compound is kinetically stable: at room temperature it decomposes only slowly. At temperatures of ca. 230&n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metabolism
Metabolism (, from el, μεταβολή ''metabolē'', "change") is the set of life-sustaining chemical reactions in organisms. The three main functions of metabolism are: the conversion of the energy in food to energy available to run cellular processes; the conversion of food to building blocks for proteins, lipids, nucleic acids, and some carbohydrates; and the elimination of metabolic wastes. These enzyme-catalyzed reactions allow organisms to grow and reproduce, maintain their structures, and respond to their environments. The word metabolism can also refer to the sum of all chemical reactions that occur in living organisms, including digestion and the transportation of substances into and between different cells, in which case the above described set of reactions within the cells is called intermediary (or intermediate) metabolism. Metabolic reactions may be categorized as ''catabolic'' – the ''breaking down'' of compounds (for example, of glucose to pyruvate by ce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Greenock
Greenock (; sco, Greenock; gd, Grianaig, ) is a town and administrative centre in the Inverclyde council areas of Scotland, council area in Scotland, United Kingdom and a former burgh of barony, burgh within the Counties of Scotland, historic county of Renfrewshire (historic), Renfrewshire, located in the west central Lowlands of Scotland. It forms part of a contiguous urban area with Gourock to the west and Port Glasgow to the east. The United Kingdom Census 2011, 2011 UK Census showed that Greenock had a population of 44,248, a decrease from the 46,861 recorded in the United Kingdom Census 2001, 2001 UK Census. It lies on the south bank of the Clyde at the "Tail of the Bank" where the River Clyde deepens into the Firth of Clyde. History Name Place-name scholar William J. Watson wrote that "Greenock is well known in Gaelic as Grianáig, dative of grianág, a sunny knoll". The Scottish Gaelic place-name ''Grianaig'' is relatively common, with another (Greenock) near Calla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blancmange
Blancmange (, from french: blanc-manger ) is a sweet dessert popular throughout Europe commonly made with milk or cream and sugar thickened with rice flour, gelatin, corn starch, or Irish moss (a source of carrageenan), and often flavoured with almonds. It is usually set in a mould and served cold. Although traditionally white (hence the name, in English literally "white eating"), blancmanges are frequently given alternative colours. Some similar desserts are French chef 's Bavarian cream, Italian , the Middle Eastern , Chinese ''annin tofu,'' Hawai'ian and Puerto Rican . The historical blancmange originated at some time during the Middle Ages and usually consisted of capon or chicken, milk or almond milk, rice, and sugar and was considered to be ideal for the sick. is a sweet contemporary Turkish pudding made with shredded chicken, similar to the medieval European dish. History The origins of the blancmange have long been believed to lie in the introduction of rice and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sweets
Candy, also called sweets (British English) or lollies (Australian English, New Zealand English), is a confection that features sugar as a principal ingredient. The category, called '' sugar confectionery'', encompasses any sweet confection, including chocolate, chewing gum, and sugar candy. Vegetables, fruit, or nuts which have been glazed and coated with sugar are said to be ''candied''. Physically, candy is characterized by the use of a significant amount of sugar or sugar substitutes. Unlike a cake or loaf of bread that would be shared among many people, candies are usually made in smaller pieces. However, the definition of candy also depends upon how people treat the food. Unlike sweet pastries served for a dessert course at the end of a meal, candies are normally eaten casually, often with the fingers, as a snack between meals. Each culture has its own ideas of what constitutes candy rather than dessert. The same food may be a candy in one culture and a dessert in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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