Results 11 to 20 of about 115,096 (255)
Acid dissociation constants of glycopeptides [PDF]
Biochemical Journal, 1977 Glycopeptides containing mainly four amino acid residues in the sequence Asn-Leu-Thr-Ser, with small amounts of additional amino acid residues, were isolated from enzymic hydrolysates of hen's-egg albumin. Heterogeneity of the carbohydrate moiety was confirmed. Acid-base titrations showed that the alpha-amino group has a pKa value of 6.43 at 25 degrees
B M, Austen, R D, Marshall
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Protolytic equilibria in homogeneous and heterogeneous systems of ketoconazole and its direct spectrophotometric determination in tablets [PDF]
Journal of the Serbian Chemical Society, 2005 The acid-base equilibria of a diprotic, slightly hydrosoluble base ketoconazole were studied in homogeneous and heterogeneous water systems. The determinations were performed at 25 ºC at a constant ionic strength of 0.1M(NaCl).
MIRJANA P. VOJIC +3 more
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Foods, 2020 This study describes the development of a method for predicting the ripening of Kimchi according to temperature to provide information on how the ripening of Kimchi changes during distribution.
Ji-Young Kim +4 more
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Influence of pH and sequence in peptide aggregation via molecular simulation [PDF]
, 2015 We employ a recently developed coarse-grained model for peptides and proteins where the effect of pH is automatically included. We explore the effect of pH in the aggregation process of the amyloidogenic peptide KTVIIE and two related sequences, using ...
Enciso, Marta +2 more
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The Dissociation Constants of Tetrahydrofolic Acid
Journal of Biological Chemistry, 1966 Six dissociable groups exist in tetrahydrofolic acid in the range H0 -3.0 to pH 14. The assignments in tetrahydrofolic acid by titrimetric and spectrophotometric comparisons with model compounds, p-aminobenzoylglutamic acid and 2-amino-6,7-dimethyl-5,6,7,8-tetrahydro-4-pteridinone, are as follows: acidic ionization of amide, pK' 10.5; N5, pK' 4.82; γ ...
R G, Kallen, W P, Jencks
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Frontiers in Chemistry, 2018 1,2-dihydroxybenzenes (DHBs) are organic compounds which are widely studied as they are applied to advanced oxidation processes (AOPs). These compounds are also related to the development of oxidative stress, wood biodegradation, and neuronal disease in ...
Romina Romero +5 more
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pH-Mediated Regulation of Polymer Transport Through SiN Pores [PDF]
, 2018 We characterize the pH controlled polymer capture and transport thorough silicon nitride (SiN) pores subject to protonation. A charge regulation model able to reproduce the experimental zeta potential of SiN pores is coupled with electrohydrodynamic ...
Ala-Nissila, Tapio, Buyukdagli, Sahin
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Binary nucleation in acid–water systems. I. Methanesulfonic acid–water [PDF]
, 1991 Experimental measurements of binary nucleation between methanesulfonic acid and water vapor were carried out for relative acidities (Ra), 0 ...
Flagan, R. C. +3 more
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Acidity constants and redox potentials of uranyl ions in hydrothermal solutions [PDF]
, 2016 Acknowledgements We thank Matthias Krack for supplying us with the pseudopotential and basis sets for U. We acknowledge the National Science Foundation of China (No.
Cheng, Jun +4 more
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The dissociation constant and acid hydrolysis rate of hydroxysulfamic acid [PDF]
Canadian Journal of Chemistry, 1989 The acid dissociation constant and hydrolysis rate of hydroxysulfamic acid (HSA) in acid aqueous solutions have been studied. The acid dissociation constant was determined to be K = 1.5 ± 0.5 M at 298 K. The hydrolysis rate, R, was found to be R = k[H+][HSA], where k = 6.2 × 1012 exp (−26 300/RT) M−1 s−1 at (μ = 1.0 M and [HSA] is the concentration of
Littlejohn, D. +2 more
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