In chemistry, racemization is a conversion, by heat or by chemical reaction, of an optically active compound into a racemic (optically inactive) form...
13 KB (1,548 words) - 07:28, 9 August 2024
A raceme (/reɪˈsiːm, rə-/) or racemoid is an unbranched, indeterminate type of inflorescence bearing flowers having short floral stalks along the shoots...
6 KB (606 words) - 20:24, 27 July 2024
(same as optical isomerism) Descriptor (chemistry) Racemic (protein) crystallography Racemization Skeletal formula#Stereochemistry which describes how...
15 KB (1,824 words) - 18:39, 29 July 2024
racemization. Thus, measuring the ratio of D to L in a sample enables one to estimate how long ago the specimen died. The rate at which racemization proceeds...
15 KB (1,778 words) - 11:37, 4 April 2024
undergo "umbrella inversion" at room temperature, leading to racemization. If the racemization is fast enough, the molecule can often be treated as an achiral...
24 KB (2,627 words) - 04:20, 22 July 2024
Racemic acid is an old name for an optically inactive or racemic form of tartaric acid. It is an equal mixture of two mirror-image isomers (enantiomers)...
6 KB (614 words) - 21:46, 26 July 2024
Racemic crystallography is a technique used in structural biology where crystals of a protein molecule are developed from an equimolar mixture of an L-protein...
11 KB (1,480 words) - 12:19, 8 January 2024
(HOAt) is a triazole used as a peptide coupling reagent. It suppresses racemization that can otherwise occur during the reaction. HOAt has a melting point...
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Foxtail (diaspore) (redirect from Foxtail (raceme))
A foxtail is a spikelet or cluster of a grass, that serves to disperse its seeds as a unit. Thus, the foxtail is a type of diaspore or plant dispersal...
7 KB (838 words) - 20:54, 9 May 2024
Nepeta racemosa (redirect from Raceme catnip)
Nepeta racemosa, the dwarf catnip or raceme catnip, syn. N. mussiniii, is a species of flowering plant in the mint family Lamiaceae, native to the Caucasus...
3 KB (222 words) - 21:59, 2 April 2021
(pKa 4.60) and suppresses base catalyzed side reactions, in particular racemization. Ethyl cyanohydroxyiminoacetate is obtained in the reaction of ethyl...
9 KB (898 words) - 18:07, 30 July 2024
the racemization is 14.5 min. at 50 °C. Substituted derivatives of this parent species, e.g. binaphthol, exhibit much higher barriers to racemization. Pu...
1 KB (102 words) - 13:53, 11 January 2024
a value near 0 towards an equilibrium value near 1, a process called racemization. Thus, measuring the ratio of D to L in a sample enables one to estimate...
14 KB (1,776 words) - 13:43, 28 June 2024
(v.3 - Jan 2020), retrieved 2020-07-31 J L Bada (1985). "Amino Acid Racemization Dating of Fossil Bones". Annual Review of Earth and Planetary Sciences...
18 KB (2,113 words) - 06:47, 2 June 2024
Chiral drugs (redirect from Racemic drug)
Chiral drugs that are equimolar (1:1) mixture of enantiomers are called racemic drugs and these are obviously devoid of optical rotation. The most commonly...
41 KB (4,547 words) - 13:45, 15 August 2024
Levorphanol (redirect from Racemic Dromoran)
It is the "left-handed" (levorotatory) stereoisomer of racemorphan, the racemic mixture of the two stereoisomers with differing pharmacology. The "right-handed"...
12 KB (915 words) - 04:26, 14 June 2024
Amphetamine (redirect from Racemic amphetamine sulfate)
dextroamphetamine. Amphetamine properly refers to a specific chemical, the racemic free base, which is equal parts of the two enantiomers in their pure amine...
273 KB (26,879 words) - 20:36, 4 August 2024
crystal). Anhydrous HOBt is explosive. It is mainly used to suppress the racemization of single-enantiomer chiral molecules and to improve the efficiency of...
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complete loss of racemization activity, while the same mutation in the downstream cysteine residue resulted in retention of 10–20% racemization activity. However...
14 KB (1,566 words) - 13:15, 26 August 2023
leaflets with the narrower end towards the base, and racemes of usually red flowers in racemes of 2 to 6. Swainsona formosa is a prostrate annual or...
14 KB (1,392 words) - 01:25, 26 January 2024
energy than the transition states for hydrogenation, resulting in rapid racemization and high yields of a single enantiomer of the product. The enantiomers...
57 KB (6,914 words) - 13:54, 30 July 2024
Senega polygama (redirect from Racemed milkwort)
Senega polygama, the racemed milkwort, is a species of flowering plant in the family Polygalaceae, native to eastern Canada and the central and eastern...
2 KB (112 words) - 23:48, 24 July 2024
Dendrobium thyrsiflorum (redirect from Pinecone-like raceme dendrobium)
thyrsiflorum is a species of orchid, commonly called the pinecone-like raceme dendrobium. It is native to the Himalayas (Bhutan, Assam, Yunnan and Arunachal...
3 KB (182 words) - 04:53, 26 January 2024
Dobutamine (redirect from Racemic-Dobutamine)
heart contractility and cardiac output. Dobutamine is administered as a racemic mixture consisting of both (+) and (−) isomers; the (+) isomer is a potent...
10 KB (856 words) - 19:31, 20 December 2023
Tartaric acid (category Racemic mixtures)
original (PDF) on 2012-09-06. "Lecture 28: Stereochemical Nomenclature; Racemization and Resolution | CosmoLearning Chemistry". CosmoLearning. W, T, Astbury...
26 KB (2,287 words) - 11:19, 18 July 2024
reagent used in peptide synthesis. It shows remarkable resistance to racemization. Fmoc-Dab(Mtt)-OH, a commercially available amino acid building block...
3 KB (179 words) - 01:47, 26 August 2023
chirality of the acetate center at a rate fast enough to ensure complete racemization. When this is achieved the CALB enzyme selectively hydrolyzes the (R)...
13 KB (1,466 words) - 19:47, 20 April 2024
activation opens the possibility for racemization of the activated amino acid. Racemization can be circumvented with 'racemization suppressing' additives such...
54 KB (6,100 words) - 16:21, 3 August 2024
process is known as RRR synthesis in which the R's stand for Resolution-Racemization-Recycle. Antimony potassium tartrate, an anion, that forms diastereomeric...
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These methods include lichenometry, dendrochronology, and amino-acid racemization. Geoarchaeology Geomorphology Hydrology Neotectonics Palynology Sedimentology...
4 KB (322 words) - 04:05, 1 March 2024