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Amandinea Pilbarensis
''Amandinea pilbarensis'' is a little-known species of crustose lichen in the family Physciaceae, First described in 2020, it is found in Australia. It is similar to ''Amandinea polyxanthonica'', but can be distinguished by its smaller and the presence of calcium oxalate and thiophanic acid in the medulla. Taxonomy ''Amandinea pilbarensis'' was formally described by the Australian lichenologist John Elix in 2020. The type specimen was collected in the Pilbara region of Western Australia, southwest of the De Grey River, east of Port Hedland, on siliceous rock. The specimen was collected by Alexander Clifford Beauglehole in August 1965. The species name refers to its type locality. Description ''Amandinea pilbarensis'' is characterised by a crustose (crust-like), (cracked)- (divided into small areas) thallus, which can spread up to 15 mm wide and 0.1 mm thick. Angular to irregularly shaped individual (small, discrete patches) range from 0.1 to 0.5 mm wide, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Alan Elix
John Alan (Jack) Elix (born 1941) emeritus professor in chemistry at the Australian National University, is an organic chemist who has contributed in many fields: lichenology, lichen chemotaxonomy, plant physiology and biodiversity and natural product chemistry. He has authored 2282 species names, and 67 genera in the field of mycology. Elix edited the exsiccata series ''Lichenes Australasici exsiccati.'' Education His first degree, B.Sc., and his Ph.D. were both in organic chemistry from the University of Adelaide. This was followed by post-doctoral years at the University of Cambridge and then a D.Sc. in natural products chemistry from the Australian National University. Career Elix spent a post doctoral year in 1966 at Cambridge, returning to Australia in 1967 to a lectureship in chemistry at the ANU. He retired as professor of chemistry in 2002, becoming professor emeritus. By 1975 he had already published several papers on the organic chemistry of lichens, and ul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cream (color)
Cream is the colour of the cream produced by cattle grazing on natural pasture with plants rich in yellow carotenoid pigments, some of which are incorporated into the fresh milk (specifically, the butterfat). This gives a yellow tone to otherwise-white milk at higher fat concentrations. Cream is the pastel colour of yellow, much as pink is to red. By mixing yellow and white, cream can be produced. The first recorded use of ''cream'' as a colour name in English was in 1590. In nature Birds * The cream-coloured courser * The cream-coloured woodpecker Mammals * The cream-coloured giant squirrel In human culture Art * Cream is used as a skin tone in some forms of art, mostly anime. It is also used to describe the general skin tone of East and South East Asia. Clothing * Men's white tuxedo jackets are usually a shade of cream or ivory to better stand out against the white dress shirt. Interior design * The colour cream is widely used as one of the off-white colours in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thin-layer Chromatography
Thin-layer chromatography (TLC) is a chromatography technique that separates components in non-volatile mixtures. It is performed on a TLC plate made up of a non-reactive solid coated with a thin layer of adsorbent material. This is called the stationary phase. The sample is deposited on the plate, which is eluted with a solvent or solvent mixture known as the mobile phase (or eluent). This solvent then moves up the plate via capillary action. As with all chromatography, some compounds are more attracted to the mobile phase, while others are more attracted to the stationary phase. Therefore, different compounds move up the TLC plate at different speeds and become separated. To visualize colourless compounds, the plate is viewed under UV light or is stained.Jork, H., Funk, W., Fischer, W., Wimmer, H. (1990): Thin-Layer Chromatography: Reagents and Detection Methods, Volume 1a, VCH, Weinheim, Testing different stationary and mobile phases is often necessary to obtain well-defined an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Potassium Hydroxide
Potassium hydroxide is an inorganic compound with the formula K OH, and is commonly called caustic potash. Along with sodium hydroxide (NaOH), KOH is a prototypical strong base. It has many industrial and niche applications, most of which utilize its caustic nature and its reactivity toward acids. An estimated 700,000 to 800,000 tonnes were produced in 2005. KOH is noteworthy as the precursor to most soft and liquid soaps, as well as numerous potassium-containing chemicals. It is a white solid that is dangerously corrosive. Properties and structure KOH exhibits high thermal stability. Because of this high stability and relatively low melting point, it is often melt-cast as pellets or rods, forms that have low surface area and convenient handling properties. These pellets become tacky in air because KOH is hygroscopic. Most commercial samples are ca. 90% pure, the remainder being water and carbonates. Its dissolution in water is strongly exothermic. Concentrated aqueous ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lichexanthone
Lichexanthone is an organic compound in the structural class of chemicals known as xanthones. Lichexanthone was first isolated and identified by Japanese chemists from a species of foliose lichen, leafy lichen in the 1940s. The compound is known to occur in many lichens, and it is important in the taxonomy (biology), taxonomy of species in several genera, such as ''Pertusaria'' and ''Pyxine''. More than a dozen lichen species have a variation of the word lichexanthone incorporated as part of their binomial name. The presence of lichexanthone in lichens causes them to fluoresce a greenish-yellow colour under long-wavelength UV light; this feature is used to help identify some species. Lichexanthone is also found in several plants (many are from the families Annonaceae and Rutaceae), and some species of fungi that do not form lichens. In lichens, the biosynthesis of lichexanthone occurs through a set of enzymatic reactions that start with the molecule acetyl-CoA and sequentially ad ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amandinea Santantaoensis
''Amandinea'' is a genus of lichenized fungi in the family Caliciaceae. Genetic studies indicates that the genus ''Amandinea'' and ''Buellia'' are the same,Scheidegger, C. 2009. Amandinea Choisy ex Scheid. & H. Mayrhofer (1993). In: C. W. Smith, A. Aptroot, B. J. Coppins, A. Fletcher, O. L. Gilbert, P. W. James and P. A. Wosley (eds.) The Lichens of Great Britain and Ireland. The British Lichen Society, Natural History Museum Publications, United Kingdom, pp. 142–144 although this is not widely accepted.Amandinea punctata in the Joshua Tree National Park (California, U.S.A.) Map collection: Kerry Knudsen, Kocourková Jana; Czech University of Life Sciences Prague, Faculty of Environmental Sciences, Department of Ecology, Czech Republic; 2012 Taxonomy The genus was originally circumscribed by Maurice Choisy in 1950, with ''Amandinea coniops'' assigned as the type species. However, the name was published invalidly because it was not accompanied by a Latin description or diagnos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
