(NMR)分析—1 环境标准样品的 31P-NMR 表征∗ 王晓钧 1, 丁士明 2**, 蒋海青 1, 白秀玲 2, 范成新 2 (1: 南京工业大学材料科学与工程学院, 南京 210009) (2: 中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室, 南京 210008) 摘要: 通过对环境标准样进行 31P-NMR 测试, 研究了磷的化学结构...
Chen Zhang1 & John P. Giesy1,4 Solution Phosphorus-31 nuclear magnetic resonance (31P NMR) spectroscopy coupled with enzymatic hydrolysis (EH) with commercially available phosphatases was used to characterize phosphorus (P) compounds in extracts of the dominant aquatic macrophytes and algae in...
通过对环境标准样进行31P-NMR测试,研究了磷的化学结构与化学位移的关系.结果表明:无机正磷酸盐(PO43-)化学位移在6.412×10-6,焦磷酸盐的化学位移在-4.353×10-6;多聚磷的化学位移分布特点是:主链末端磷化学位移在-3.53×10-6至-4.40×10-6之间,中间磷在-18.159×10-6至-20.2
The enzymatic hydrolysis of inositol hexaphosphate showed a very distinct pattern when the products were analysed using 31P NMR spectroscopy. It seems likely that the hydrolysis proceeds in a stepwise manner and that each of the lower inositol phosphates is the dominant species present at different ...
The enzymatic hydrolysis of fructose 1,6-bisphosphate (Fru-1,6-P2) to fructose 6-phosphate (Fru-6-P) and inorganic phosphate (Pi), which is catalyzed by fructose-1,6-bisphosphatase, has been studied by 31P nuclear magnetic resonance spectroscopy (NMR). At pH 7.5 and 15 degrees C, the...
By testing a series of solution 31P-NMR spectroscopy of model phosphorus compounds including inorganic phosphate,orthophosphate monoesters and diesters, and organic polyphosphate(determined in 1mol/L NaOH and 16.7% D2O), standard phosphorusspectra were o
We investigated P speciation and bioavailability in sediments collected over multiple months from a shallow, eutrophic bay in Lake Champlain (Missisquoi Bay, VT) using solution P nuclear magnetic resonance (NMR) spectroscopy and enzymatic hydrolysis (EH) analysis of sediments collected during years ...
31P NMR analysis of samples prepared in a sodium cholate detergent system was used as a method for the identification and quantification of enzymatic hydrolysis products of lecithin. To precisely chadoi:10.1007/s11746-017-2992-0Yang, Ying
NMR - 1HdiffusionWe conducted 31P NMR kinetic studies and 1H-diffusion measurements on myosin-catalyzed hydrolysis of adenosine triphosphate (ATP) under varied conditions. The data elucidate well the overall hydrolysis rate and various factors that significantly impact the reaction. We found that ...
Assignments of signals from phosphatidylethanolamine (PE) subclasses were confirmed in the sodium-cholate system by lipase-mediated selective hydrolysis of bovine-brain PE. The utility of (31)P NMR to monitor enzymatic PL oxidation was further demonstrated. Possible changes in PL composition with ...