Results 21 to 30 of about 222,384 (349)

A NEW SYNTHESIS OF ASPARTIC ACID [PDF]

open access: yesJournal of Biological Chemistry, 1930
In previous syntheses of aspartic acid the following reactions have been used: The decomposition of acid ammonium malate by heat,1 the racemization of active aspartic acid2 and active asparagine,3 the reaction of maleic or fumaric acid with ammonia,4 the reduction of oxalacetic ester oxime,5 the reaction of silver fumarate or potassium acid fumarate ...
B. W. Smart, Max S. Dunn
openaire   +2 more sources

Biodegradability and tissue reaction of random copolymers of L-leucine, L-aspartic acid, and L-aspartic acid esters [PDF]

open access: yes, 1977
A series of copoly(α-amino acids) with varying percentages of hydrophilic (l-aspartic acid) and hydrophobic monomers (l-leucine, ß-methyl-l-aspartate, and ß-benzyl-l-aspartate) were implanted subcutaneously in rats and the macroscopic degradation ...
Bantjes, A.   +4 more
core   +3 more sources

Differentiation Between Ripening Stages of Iberian Dry-Cured Ham According to the Free Amino Acids Content [PDF]

open access: yes, 2020
In this paper, the differentiation of three ripening stages, postsalting, drying, and cellar, of Iberian dry-cured ham has been carried out according to their free amino acids contents. Eighteen L-amino acids, alanine, 2-aminobutanoic acid, aspartic acid,
Alcázar Rueda, Ángela   +3 more
core   +1 more source

Specific Adsorption of Aspartic Acid on Iron (III) and Nickel (II) Oxides

open access: yesEurasian Chemico-Technological Journal, 2012
The dependences of zeta - potential and adsorption of aspartic acid on NiO and Fe2O3 oxideswere investigated as a function of aspartic acid concentration, pH and adsorption time using microelectrophoresis and potentiometric titration methods. Shifting of
I. B. Dmitrieva   +3 more
doaj   +1 more source

Immunohistochemical localisation of d-β-aspartic acid in pingueculae [PDF]

open access: yes, 2009
Background: D-β-Aspartic acid residues, which are biologically uncommon, have been reported to accumulate in various proteins of the living body with age.
Fujii N   +6 more
core   +1 more source

Isolation and functional verification of an aspartate aminotransferase gene from Neoporphyra haitanensis

open access: yesBMC Plant Biology, 2023
Background Neoporphyra haitanensis is a commercial laver species in China. Aspartic acid is an important flavor amino acid, and aspartate aminotransferase (AAT) is a crucial enzyme in its biosynthesis.
Shuang Li   +3 more
doaj   +1 more source

Dissociation constants and thermodynamic properties of amino acids used in CO2 absorption from (293 to 353) K [PDF]

open access: yes, 2007
The second dissociation constants of the amino acids βalanine, taurine, sarcosine, 6-aminohexanoic acid, DL-methionine, glycine, L-phenylalanine, and L-proline and the third dissociation constants of L-glutamic acid and L-aspartic acid have been ...
Albert A   +44 more
core   +5 more sources

Addition of weak acids in electrolytes to prevent osmosis in aqueous organic redox flow batteries

open access: yesElectrochemistry Communications, 2021
Water transfer issues related to unbalanced ionic strengths in aqueous organic redox flow batteries (AORFBs) are often overlooked. In this work, a simple strategy based on the addition of a weak acid in the negolyte was studied to prevent osmosis in ...
Jean-Marie Fontmorin   +4 more
doaj   +1 more source

Mutation of aspartic acid 262 on estrogen receptor abrogates estradiol signaling pathway

open access: yesGynecological Endocrinology, 2023
Objective ERα (estrogen receptor alpha) exerts nuclear genomic actions and membrane-initiated non-genomic effects. The mutation of aspartic acid into alanine in vitro revealed the critical role of aspartic acid 258 (corresponding to mouse amino acid site
Xingyan Xu   +9 more
doaj   +1 more source

Predicting protein decomposition: the case of aspartic-acid racemization kinetics [PDF]

open access: yes, 1999
The increase in proportion of the non-biological (D-) isomer of aspartic acid (Asp) relative to the L- isomer has been widely used in archaeology and geochemistry as a tool for dating. The method has proved controversial, particularly when used for bones.
A. C. T. van Duin   +24 more
core   +3 more sources

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