Five phospholipids in human placenta were determined by phosphorus 31 nuclear magnetic resonance(^(31)P NMR)spectroscopy and thin-layer chromatography(TLC) scanning combined with the corrective method of absorbance pr...Five phospholipids in human placenta were determined by phosphorus 31 nuclear magnetic resonance(^(31)P NMR)spectroscopy and thin-layer chromatography(TLC) scanning combined with the corrective method of absorbance proportional coefficient. The NMR spectrometer used this investigation was a Bruker AM-500 spectrometer operating at 202.4 MHz for ^(31)P chemical shifts are relative to 85% phosphoric acid. TIC was carried out by silica gel H plate developed in chloroform-methanol-glacial acetic acid-ethanol-water(25:4:6:2:0.5),with Vaskovsky reagent as colour -developing agent of phospholipids.展开更多
Introduction and Motivation Legal science and philosophy are two of the most important dis- ciplines in the field of human rights research, both of them assuming different roles and functions in human rights analysis...Introduction and Motivation Legal science and philosophy are two of the most important dis- ciplines in the field of human rights research, both of them assuming different roles and functions in human rights analysis. Scholars can discuss or debate from a philosophical per- spective such as where the ideology of human rights comes from, what the ontology of human rights is and whether people could legitimate human rights claims on the basis of natural morality.展开更多
文摘Five phospholipids in human placenta were determined by phosphorus 31 nuclear magnetic resonance(^(31)P NMR)spectroscopy and thin-layer chromatography(TLC) scanning combined with the corrective method of absorbance proportional coefficient. The NMR spectrometer used this investigation was a Bruker AM-500 spectrometer operating at 202.4 MHz for ^(31)P chemical shifts are relative to 85% phosphoric acid. TIC was carried out by silica gel H plate developed in chloroform-methanol-glacial acetic acid-ethanol-water(25:4:6:2:0.5),with Vaskovsky reagent as colour -developing agent of phospholipids.
文摘Introduction and Motivation Legal science and philosophy are two of the most important dis- ciplines in the field of human rights research, both of them assuming different roles and functions in human rights analysis. Scholars can discuss or debate from a philosophical per- spective such as where the ideology of human rights comes from, what the ontology of human rights is and whether people could legitimate human rights claims on the basis of natural morality.
