Category: Metals
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What Are Plant Matrix Metalloproteinases?
Plant matrix metalloproteinases are metalloproteins and zinc enzymes found in plants. Matrix Metalloproteinase Matrix metalloproteinases (MMPs) are zinc endopeptidases, commonly called metzincins. MMP enzymes represent an ancient family of proteins with major similarities in genetic make-up that are present in a range of diverse organisms from unicellular bacteria to multicellular vertebrates and invertebrates. The superfamily is distinguished due to its motif consisting of three histidines bonded to…
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What Is Nitrophenol? (besides something mentioned in ‘Scientific Opinion on the re‐evaluation of aspartame as a food additive’)
Nitrophenols are compounds of the formula HOC6H5−x(NO2)x. The conjugate bases are called nitrophenolates. Nitrophenols are more acidic than phenol itself. Wikipedia Mono-nitrophenols with the formula HOC6H4NO2. Three isomeric nitrophenols exist: o-Nitrophenol (2-nitrophenol; OH and NO2 groups are neighboring; CAS number: 88-75-5), a yellow crystalline solid (m.p. 46 °C). m-Nitrophenol (3-nitrophenol, CAS number: 554-84-7), a yellow solid (m.p. 97 °C) and precursor to the…
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Arsenic Etymology
arsenic (n.) late 14c., “yellow arsenic, arsenic trisulphide,” from Old French arsenic, from Latin arsenicum, from late Greek arsenikon “arsenic” (Dioscorides; Aristotle has it as sandarake), adapted from Syriac (al) zarniqa “arsenic,” from Middle Persian zarnik “gold-colored” (arsenic trisulphide has a lemon-yellow color), from Old Iranian *zarna- “golden,” from PIE root *ghel- (2) “to shine,” with derivatives referring to bright materials and gold. The form of the Greek word…
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Arsenic at Wellcome Collection
539 Results for “arsenic” Arsenic in drinking water / Subcommittee on Arsenic in Drinking Water, Committee on Toxicology, Board on Environmental Studies and Toxicology, Commission on Life Sciences, National Reseach Council. National Research Council (U.S.). Subcommittee on Arsenic in Drinking WaterDate[1999], ©1999 Books Arsenic in drinking water : 2001 update / subcommittee to update the…
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Green synthesis of gold nanoparticles using aspartame and their catalytic activity for p-nitrophenol reduction
Wu S, Yan S, Qi W, Huang R, Cui J, Su R, He Z. Green synthesis of gold nanoparticles using aspartame and their catalytic activity for p-nitrophenol reduction. Nanoscale Res Lett. 2015 May 8;10:213. doi: 10.1186/s11671-015-0910-7. PMID: 25991916; PMCID: PMC4431991. Abstract We demonstrated a facile and environmental-friendly approach to form gold nanoparticles through the reduction…
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Aspartame Notes
NOTES ASPARTAME Under various names, aspartame is an ingredient in tens of thousands of consumables. some researchers suggest it is “by far” the most dangerous food additive. this is a collection of notes and articles concerning aspartame (in no particular order). HISTORY Aspartame was discovered in 1965 by James M. Schlatter, a chemist working for…
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Delftia acidovorans
Delftia acidovorans is a Gram-negative, motile, non-sporulating, rod-shaped bacterium known for its ability to biomineralize gold and bioremediation characteristics.
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Cupriavidus metallidurans
C. metallidurans plays a vital role, together with Delftia acidovorans, in the formation of gold nuggets. It precipitates metallic gold from a solution of gold(III) chloride, a compound highly toxic to most other microorganisms.
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The Real Philosopher’s Stone: Turning Lead into Gold
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