Tag: silver
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Silicene is a two-dimensional allotrope of silicon, with a hexagonal honeycomb structure similar to that of graphene
Contrary to graphene, silicene is not flat, but has a periodically buckled topology; the coupling between layers in silicene is much stronger than in multilayered graphene; and the oxidized form of silicene, 2D silica, has a very different chemical structure from graphene oxide. History Although theorists had speculated about the existence and possible properties of free-standing silicene, researchers…
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Zinc, maybe
No proof for the need of zinc in human cells was shown until the late 1930s. More than most ever wanted to know about zinc. A work in progress.
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Cyanamide notes (it was a polio vaccine that spurred these notes and by now polio has five mentions on the page and these are two of them)
I’m going to add some polio vaccine stuff at the top of these notes. Hilary Koprowski is the one mentioned on the Polio Hall of Fame page who was not included in the hideous monument, see What In God’s Name, even though he (and his work) have direct connection to those who are included. He…
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Basil O’Connor (1892 – 1972) was an American lawyer
In cooperation with U.S. President Franklin D. Roosevelt he started two foundations for the rehabilitation of polio patients and the research on polio prevention and treatment. From 1944 to 1949 he was chairman and president of the American Red Cross and from 1945 to 1950 he was chairman of the League of Red Cross Societies.…
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Kodoku: The Venomous Vortex of Ancient Curses
Here’s one that might make your skin crawl and your blood run cold! Welcome to the world of Kodoku, the sinister sorcery that turns creepy crawlies into catastrophic curses! Imagine, if you dare, a jar teeming with nature’s most venomous vermin – scorpions, centipedes, and snakes, oh my! But this is no petting zoo, my…
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Glycoside
In chemistry, a glycoside is a molecule in which a sugar is bound to another functional group via a glycosidic bond. Glycosides play numerous important roles in living organisms. Many plants store chemicals in the form of inactive glycosides. These can be activated by enzyme hydrolysis, which causes the sugar part to be broken off, making the chemical available for use. Many such plant glycosides are used as medications.…
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Seven heavens notes
In religious or mythological cosmology, the seven heavens refer to seven levels or divisions of the Heavens. The concept, also found in the ancient Mesopotamian religions, can be found in Judaism, Christianity, and Islam; a similar concept is also found in some other religions such as Hinduism. Some of these traditions, including Jainism, also have a concept of seven earths or seven underworlds both with the metaphysical realms of deities and with observed…
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Jade burial suit
A jade burial suit (Chinese: 玉衣; pinyin: yù yī; lit. ‘jade clothing’) is a ceremonial suit made of pieces of jade in which royal members in Han dynasty China were buried. Construction Of the jade suits that have been found, the pieces of jade are mostly square or rectangular in shape, though triangular, trapezoid and rhomboid plaques have also been found. Plaques are often joined by means of…
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Argyrodes pluto is a species of cobweb spider and kleptoparasite
Argyrodes pluto is a species of cobweb spider in the family Theridiidae. It is found in the United States, Mexico, and Jamaica. Argyrodes, also called dewdrop spiders, is a genus of comb-footed spiders that was first described by Eugène Louis Simon in 1864. They occur worldwide, and are best known for their kleptoparasitism. They can spin their own webs, but tend to invade and reside in their hosts’ webs. This relationship…
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Baccharis is a genus of perennials and shrubs in the aster family (Asteraceae)
They are commonly known as baccharises but sometimes referred to as “brooms”, because many members have small thin leaves resembling the true brooms. They are not at all related to these however, but belong to an entirely different lineage of eudicots. B. halimifolia is commonly known as “groundsel bush”, however true groundsels are found in the genus Senecio. Baccharis, with over 500…
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Adrenochrome
Adrenochrome is a chemical compound produced by the oxidation of adrenaline (epinephrine). It was the subject of limited research from the 1950s through to the 1970s as a potential cause of schizophrenia. While it has no current medical application, the related derivative compound, carbazochrome, is a hemostatic medication. Despite this compound’s name, it is unrelated to the element chromium; instead, the ‑chrome suffix indicates a relationship to color, as pure adrenochrome…
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Arginine
Arginine is the amino acid with the formula (H2N)(HN)CN(H)(CH2)3CH(NH2)CO2H. The molecule features a guanidino group appended to a standard amino acid framework. At physiological pH, the carboxylic acid is deprotonated (−CO2−) and both the amino and guanidino groups are protonated, resulting in a cation. Only the l-arginine (symbol Arg or R) enantiomer is found naturally. Arg residues are common components of proteins. It is encoded by the codons CGU, CGC,…
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Chemistry: A Volatile History
Chemistry: A Volatile History is a 2010 BBC documentary on the history of chemistry presented by Jim Al-Khalili. It was nominated for the 2010 British Academy Television Awards in the category Specialist Factual. Episode 1: Discovering the Elements Introduction Only in the last 200 years have we known what an element is – a substance that cannot be broken down further by chemical reaction. The Ancient Greeks,…
