The Dissociation Constants of Pyruvic and Oxaloacetic Acid.
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منابع مشابه
Determination of the acid dissociation constants of the p-sulphonato-calix[4]arene
The acid dissociation constants of the hydroxyl groups in 25, 26, 27, 28-tetrahydroxy-5, 11, 17, 23-tetrasulphonic-calix[4]arene (SC4) were determined at 25οC by a combination of potentiometric and spectrophotometric titration method. The first and second acid dissociation constants (pKa1, pKa2) were found to be 3.19 and 12.1, which demonstrated pKa shift due to intramolecular hydrogen bonding ...
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Scurvy is associated with abnormal carbohydrate metabolism and diminished production of insulin (1). Banerjee et al. (2) observed increased accumulation of citrate, malate, and lactate in the tissues of scorbutic guinea pigs. This was possibly due to the insulin insufficiency associated with scurvy since prolonged injection of insulin to scorbutic guinea pigs diminished the tissue concentration...
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Scurvy is associated with abnormal carbohydrate metabolism and diminished production of insulin (1). Banerjee et al. (2) observed increased accumulation of citrate, malate, and lactate in the tissues of scorbutic guinea pigs. This was possibly due to the insulin insufficiency associated with scurvy since prolonged injection of insulin to scorbutic guinea pigs diminished the tissue concentration...
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Six dissociable groups exist in tetrahydrofolic acid in the range Ho -3.0 to pH 14. The assignments in tetrahydrofolic acid by titrimetric and spectrophotometric comparisons with model compounds, +uninobenzoylglutamic acid and 2-amino-6,7-dimethyl-5,6,7,8-tetrahydro-4-pteridinone, are as follows: acidic ionization of amide, pK’ 10.5; Ns, pK’ 4.82; y-carboxyl, pK’ 4.8; cr-carboxyl, pK’ 3.5; N1, ...
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The acidic dissociation constants in the range H,, -1.3 to pH 7 of folic acid, dihydrofolic acid, methopterin (N(lO)methylfolic acid), and methotrexate have been measured by potentiometric and spectrophotometric titrations. Assignment of these dissociations was made by comparison to model compounds, by proton magnetic resonance measurements, and by examination of associated ultraviolet absorban...
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ژورنال
عنوان ژورنال: Acta Chemica Scandinavica
سال: 1952
ISSN: 0904-213X
DOI: 10.3891/acta.chem.scand.06-0243