Results 11 to 20 of about 86,679 (262)
Science Journal of University of Zakho, 2019 The first and second dissociation constants of malonic acid in different composition of (ethylene glycol-water)%, (10, 20 and 30)% mixed solvent determined using the electromotive force measurements of galvanic cells without liquid junction at nine ...
Soleen S. Ahmed, Lazgin A. Jamil
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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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The acid dissociation constants of mellitic acid
CHIMIA, 1977 The acid dissociation constants of mellitic acid were evaluated at 25 °C from potentiometric titrations in aqueous solutions of the constant Na+ molarity 3 M consisting preponderantly of NaClO4. The obtained values are summarized in the table.
Adrian Beutler, Anton Stebler
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Determination of the energy characteristics of the reactions UF6 ↔ UF5 + F and UF6 ↔ UF4 + F2 [PDF]
Nuclear Energy and Technology, 2021 Quantum-mechanical methods are used to assess the energy barriers to dissociation and recombination reactions of UF6 ↔ UF5 + F and UF6 ↔ UF4 + F2.
Konstantin Yu. Khromov +3 more
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Química Nova, 2011 This work describes the creation of an very simple calculation algorithm, based in basic chemical and mathematic principles, for the calculation of weak diprotic acid dissociation constants as, for example, amino acids, from potentiometric titrations ...
Elsa M. Gonçalves +1 more
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Bayesian analysis of high-throughput quantitative measurement of protein-DNA interactions.
PLoS ONE, 2011 Transcriptional regulation depends upon the binding of transcription factor (TF) proteins to DNA in a sequence-dependent manner. Although many experimental methods address the interaction between DNA and proteins, they generally do not comprehensively ...
David D Pollock +5 more
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NIPPON KAGAKU KAISHI, 1988 ピリジン中での酸の解離機構を解明する目的で,ピリジンを溶媒としてニトロフェノール類の電気伝導度測定およびこれらのカリウム壇の溶解度測定を行なった。酸(HA)の解離としては,単純イオン対の解離平衡とホモ共役イオン(HA2-)の生成平衡を考え,単純イオン対の熱力学的解離定数およびホモ共役生成定数を決定した。酸の解離定数はニトロ基の置換数に比例して大きくなり,酸の強さの序列は,ピクリン酸>2,4-ジニトロフェノール(2,4-DNP)>2,6-DNP>2,5-DNPおよびp-ニトロフェノール(p-NP)>ο-NP>m-NPであった。メタ位にニトロ基が置換したフェノールは,解離が低いばかりでなくホモ共役体を形成しやすく,ピクリン酸や2,4および2,6-DNPはほとんどホモ共役体を形成しないことが認められた ...
Isao YAMAKAWA, Toyohiko NAKAJIMA
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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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Molecules, 2011 A series of new 8-arylhydrazono-2-(benzylsulfanyl)-7H-purin-6-ones 6 were synthesized, their electronic absorption spectra in different organic solvents of varying polarities were investigated and their acid dissociation constants in both the ground and ...
Hosam A. Saad +3 more
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Advanced Engineering Research, 2015 The work objective is to improve the operational conductometric vapor quality control at the thermal power plants. To this end, methods identifying СО2 concentrations in the vapor under the neutral aqueous-chemical mode without ammonia addition are ...
Vladimir N. Shcherbakov
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