Chemical characteristics of dehydro-L-ascorbic acid
スポンサーリンク
概要
- 論文の詳細を見る
Dehydro-L-ascorbic acid (DAA) exists mainly in its C2 hydrated bicyclic form (5) in an aqueous solution, and monocyclic DAA (3), which is the expected reaction product immediately after the oxidation of AA, has not been observed by NMR spectroscopy. The formation mechanism for 5 from 3 and the stability of 5 were examined by the semi-empirical molecular orbital method (MOPAC). It was indicated that the protonation reaction was the key step in the formation of 5,therefore, the formation of 5 is thought to be more difficult under physiological conditions which mostly involve in the neutral or slightly alkaline state. However, by NMR, it was confirmed that, even in a neutral or slightly alkaline state very close to physiological conditions, the predominant form of DAA existing in an aqueous solution immediately after the enzymatic oxidation of AA was confirmed to be 5,although the possible existence of other forms of DAA at very low concentrations could not be completely excluded.
- 社団法人日本農芸化学会の論文
- 2000-08-23
著者
-
Nishikawa Yoko
Institute Of Environmental Science For Human Life Ochanomizu University
-
Nishikawa Yoko
Institute Of Environmental Science For Human Life
-
KURATA Tadao
Institute of Environmental Science for Human Life, Ochanomizu University
-
Kurata T
Faculty Of Applied Life Sciences Niigata University Of Pharmacy And Applied Life Sciences
-
Kurata Tadao
Department Of Food And Nutrition Ochanomizu University
-
Kurata Tadao
Institute Of Environmental Science For Human Life Ochanomizu University
-
Kurata Tadao
Niigata Univ. Pharmacy And Applied Sci. Niitsu Jpn
-
KURATA Tadao
Institute of Environmental Science for Human Life
関連論文
- Effects of 2,3-Diketo-L-gulonic Acid on the Oxidation of Yolk Lipoprotein
- Influence of Cigarette Smoke on the L-Ascorbic Acid Metabolism and the Activities of Drug-Metabolizing Enzyme in Rats
- Physiological Role of L-Ascorbic Acid in Rats Exposed to Cigarette Smoke
- Glutathione Reacts with Glyoxal at the N-Terminal
- Stabilization of L-Ascorbic Acid by Superoxide Dismutase and Catalase
- Formation Mechanism of Monodehydro-L-ascorbic Acid and Superoxide Anion in the Autoxidation of L-Ascorbic Acid
- Interconversion between Dehydro-L-Ascorbic Acid and L-Ascorbic Acid
- Effects of Thiol Compounds on the Formation of Nitriles from Glucosinolates(Food & Nutrition)
- Effects of pH and Ferrous Ion on the Degradation of Glucosinolates by Myrosinase(Food & Nutrition)
- Effects of L-Ascorbic Acid and Superoxide Anion Radical on the Polymerization of Ovalbumin
- Chemical characteristics of dehydro-L-ascorbic acid
- Time-Dependent Changes of Tissue Erythorbic Acid Concentrations in Guinea Pigs
- Autoxidation Reaction Mechanism for L-Ascorbic Acid-related Compounds in Methanol without Metal Ion Catalysis
- Contents of Erythorbic Acid in the Tissues of Guinea Pigs Intraperitoneally Administered Erythorbic Acid
- Autoxidation Reaction Mechanism for L-Ascorbic Acid in Methanol without Metal Ion Catalysis
- Formation of L-Threonolactone and Oxalic Acid in the Autoxidation Reaction of L-Ascorbic Acid : Possible Involvement of Singlet Oxygen
- The Behavior of _L-Ascorbic Acid in the Prolyl 4-Hydroxylase Reaction(Food & Nutrition)
- The Role of _L-Ascorbic Acid in the Decarboxylation of α-Ketoglutarate Catalyzed by Prolyl 4-Hydroxylase(Food & Nutrition)
- Study on the Volatile Compounds of Fish Sauces : Shottsuru, Nampla and Noucman(Food & Nutrition)
- Characterization of Off-Flavors in Porcine Liver Collected by SDE
- Scavenging Effects of L-Ascorbic Acid on 1, 1-Diphenyl-2-picrylhydrazyl in Homogeneous and Heterogeneous Reaction Systems
- Possible Formation of Dehydro-L-ascorbic Acid from 2,3-Diketo-L-gulonic Acid in an Aqueous Solution
- Regulation of Cigarette Smoke-Induced Cytochrome P4501A1 Gene Expression in Osteogenic Disorder Shionogi Rat Liver and in Lung by Large Ascorbic Acid Dose(Biochemistry & Molecular Biology)
- Identification of 3,4-Dihydroxy-2-oxo-butanal (L-threosone) as an Intermediate Compound in Oxidative Degradation of Dehydro-L-ascorbic Acid and 2,3-Diketo-L-gulonic Acid in a Deuterium Oxide Phosphate Buffer(Food & Nutrition Science)
- Contents of Erythorbic Acid in the Tissues of Guinea Pigs Intraperitoneally Administered Erythorbic Acid
- Activities of D and L-Xyloascorbic Acid and D and L-Araboascorbic Acid as a Cofactor for Dopamine β-Hydroxylase Reaction
- The Level of Orally Ingested Vitamin C Affected the Expression of Vitamin C Transporters and Vitamin C Accumulation in the Livers of ODS Rats
- The Behavior of L-Ascorbic Acid in the Healing Process of Dorsal Wounds in Guinea Pigs.
- Comparison of Absorption of Erythorbic Acid and Ascorbic Acid in Guinea Pig Small Intestine.
- Effects of L-Ascorbic Acid and Superoxide Anion Radical on the Polymerization of Wheat Flour Protein.
- Structure and Chemical Characteristics of Dehydro-L-Ascorbic Acid in Solutions.