Category: 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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Albumen prints and egg whites…all the rage back in the day…and a few other things
The albumen print, also called albumen silver print, was published in January 1847 by Louis Désiré Blanquart-Evrard, and was the first commercially exploitable method of producing a photographic print on a paper base from a negative. It used the albumen found in egg whites to bind the photographic chemicals to the paper and became the dominant form of photographic positives from 1855 to the start…
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p-Phenylenediamine (PPD) is a derivative of aniline used in kevlar, hair dye and henna substitutions among other things, the derivatives of which are used in antiozonants among other horrors
p-Phenylenediamine (PPD) is an organic compound with the formula C6H4(NH2)2. This derivative of aniline is a white solid, but samples can darken due to air oxidation.It is mainly used as a component of engineering polymers and composites like kevlar. It is also an ingredient in hair dyes and is occasionally used as a substitute for henna. Production PPD is produced via three routes. Most commonly, 4-nitrochlorobenzene is treated…
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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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Catecholamine (CA)
A catecholamine (abbreviated CA) is a monoamine neurotransmitter, an organic compound that has a catechol (benzene with two hydroxyl side groups next to each other) and a side-chain amine. Fitzgerald, P. A. (2011). “Chapter 11. Adrenal Medulla and Paraganglia”. In Gardner, D. G.; Shoback, D. (eds.). Greenspan’s Basic & Clinical Endocrinology (9th ed.). New York: McGraw-Hill. Retrieved October 26, 2011. Catechol, not to be confused with Catechin which is also sometimes called catechol, can be either…
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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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Saints Cosmas and Damian are regarded as the patrons of physicians, surgeons, pharmacists and twins
Cosmas and Damian (Arabic: قُزما ودميان, romanized: Qozma wa Demyaan; Greek: Κοσμᾶς καὶ Δαμιανός; Latin: Cosmas et Damianus; c. 3rd century – c. 287 or 303 AD) were two Arab physicians and early Christian martyrs. They practised their profession in the seaport of Aegeae, then in the Roman province of Syria. Cosmas and Damian were third century Arabian-born twin brothers who embraced Christianity and practised medicine and surgery without a fee. This led them…
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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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Conductive ink
Conductive ink is an ink that results in a printed object which conducts electricity. It is typically created by infusing graphite or other conductive materials into ink. There has been a growing interest in replacing metallic materials with nanomaterials due to the emergence of nanotechnology. Among other nanomaterials, graphene, and carbon nanotube-based conductive ink are gaining immense popularity due to their high…
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Electoral ink
Electoral ink, indelible ink, electoral stain or phosphoric ink is a semi-permanent ink or dye that is applied to the forefinger (usually) of voters during elections in order to prevent electoral fraud such as double voting. It is an effective method for countries where identification documents for citizens are not always standardized or institutionalized. One of the more common election ink compositions is based on silver nitrate, which can produce a stain lasting several weeks. It…
