Results for 'racemization'

7 found
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  1.  49
    Historical and other considerations regarding the crystal form of sodium-ammoniumd- andl-tartrate, potassiumd- andl-tartrate, potassium-ammoniumd- andl-tartrate, and potassium racemate—I.T. S. Patterson & Charles Buchanan - 1945 - Annals of Science 5 (3):288-295.
  2.  30
    Historical and other considerations regarding the crystal form of sodium-ammoniumd- andl-tartrate, potassiumd- andl-tartrate, potassium-ammoniumd- andl-tartrate, and potassium racemate.—II.T. S. Patterson & Charles Buchanan - 1947 - Annals of Science 5 (4):317-324.
  3.  48
    Restaging Liebig: A Study in the Replication of Experiments.Melvyn Usselman, Alan Rocke, Christina Reinhart & Kelly Foulser - 2005 - Annals of Science 62 (1):1-55.
    In a publication of 1831 later seen as a milestone in the development of chemistry, Justus Liebig announced a new apparatus for the analysis of organic compounds and provided analytical results for fifteen substances. In this paper we used the detailed descriptions published by Liebig in 1837 to reconstruct his apparatus and methods for hydrogen, carbon and nitrogen analysis. Our replications of his analyses of racemic acid, cinchonine, narcotine, and urea reveal that his two pieces of apparatus give excellent results (...)
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  4.  5
    Pasteur et le transformisme.Louis Blaringhem - 1923 - Paris,: Masson et cie.
    Excerpt from Pasteur Et le Transformisme Il avait constaté que les racemates étaient formés d'un mélange de cristaux hémiédriques droits et gauches et, les ayant triés à la pince, il put isoler les hémiédriques gauches (qui étaient alors inconnus), et vérifier, ce qu'il prévoyait, qu'ils devaient dévier à gauche. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art (...)
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  5.  27
    New insights into the origin of biological chirality.Steven J. Blumenthal - 1984 - Bioessays 1 (6):258-260.
    Life is characterized by a selectivity for asymmetric molecules. A great deal of theoretical and experimental work has yet to explain why living organisms utilize only L‐amino acids in proteins and D‐sugars in RNA and DNA. Also unknown is how a form of life based on asymmetric molecules evolved from an environment containing a racemic mixture of prebiotic molecules. By what mechanism did this selectivity for asymmetric molecules take place?
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  6.  15
    From Minerals to Simplest Living Matter: Life Origination Hydrate Theory.Elena A. Kadyshevich & Victor E. Ostrovskii - 2023 - Acta Biotheoretica 71 (2):1-67.
    Long since, people tried to solve the mystery of the way that led to the appearance and propagation of living entities. However, no harmonious understanding of this mystery existed, because neither the scientifically grounded source minerals nor the ambient conditions were proposed and because it was groundlessly taken that the process of living matter origination is endothermal. The Life Origination Hydrate Theory (LOH-Theory) first suggests the chemical way capable of leading from the specified abundant natural minerals to origination of multitudes (...)
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  7.  12
    Mammalian D‐cysteine: A novel regulator of neural progenitor cell proliferation.Robin Roychaudhuri & Solomon H. Snyder - 2022 - Bioessays 44 (7):2200002.
    D‐amino acids are being recognized as functionally important molecules in mammals. We recently identified endogenous D‐cysteine in mammalian brain. D‐cysteine is present in neonatal brain in substantial amounts (mM) and decreases with postnatal development. D‐cysteine binds to MARCKS and a host of proteins implicated in cell division and neurodevelopmental disorders. D‐cysteine decreases phosphorylation of MARCKS in neural progenitor cells (NPCs) affecting its translocation. D‐cysteine controls NPC proliferation by inhibiting AKT signaling. Exogenous D‐cysteine inhibits AKT phosphorylation at Thr 308 and Ser (...)
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