The former reaction was predominant at pH values below 4, whereas the latter reaction predominated at pH values between 4 and 7. These results are used as a basis for questioning the structural assignments previously made to some ascorbic acid esters.Rolf B. Paulssen...
Structure of Green Pigment Formed by the Reaction of Caffeic Acid Esters (or Chlorogenic acid) with a Primary Amino Compound(Food & Nutrition Science) A marked greening observed in some foods such as sweet potato, burdock, and others during food processing was shown to be due to green pigment...
Do ascorbic acid, potassium nitrate, and magnesium sulfate undergo a reaction when mixed dry or solved in water in pairs or altogether ? Logged Borek Mr. pH Administrator Deity Member Posts: 27891 Mole Snacks: +1816/-412 Gender: I am known to be occasionally wrong. ...
The reaction of ascorbic acid with different heme iron redox states of myoglobin C Giulivi,E Cadenas - 《Febs Letters》 被引量: 0发表: 1993年 Pharmacological and Clinical Aspects of Heme Oxygenase This review is intended to stimulate interest in the effect of increased expression of heme oxygena...
For such purpose hydride generation atomic absorption spectrometry can be used based on the generation of certain types of hydride, depending on the pH value and pretreatment in different reaction media. In this study, we have investigated the effect of L-ascorbic acid as the reaction medium as ...
The invention relates to a method for producing L-ascorbic acid from 2-keto-L-gulonic acid or 2,3-4,6-diacetone-2-keto-L-gulonic acid. The reaction is carried out in the presence of water and hydrogen halide and the concentration of the hydrogen halide in water is greater than 37 wt....
Ascorbic acid is an important water-soluble antioxidant in biological fluids. Ascorbic acid scavenges reactive oxygen and nitrogen species, such as superoxide, hydroxyl, nitroxide and aqueous peroxyl radicals, singlet oxygen, ozone, peroxynitrite, nitrogen dioxide, and hypochlorous acid. Two major ...
Production and use of a reaction product from ascorbic acid with alpha, beta - unsaturated ketone or vinyl - aliphatic ketone. 来自 掌桥科研 喜欢 0 阅读量: 5 申请(专利)号: DE19873781366T 申请日期: 1987-04-15 公开/公告号: DE3781366T2 ...
摘要: Ethers of ascorbic acid, isoascorbic acid, dihydroascorbic acid, dihydroisoascorbic acid, deoxyascorbic acid, and scorbamic acid, and ketals and acetals thereof, having angiogenesis and arthritis inhibiting properties, are provided.收藏 引用 批量引用 报错 分享 ...
The kinetics of the reduction of colloidal MnO 2 by ascorbic acid has been studied spectrophotometrically. Under pseudo-first-order conditions ([ascorbic acid] [(MnO 2) n]) the reaction was very fast. To obtain the rate constants as a function of [ascorbic acid], [(MnO 2) n], and ...