Here, we took advantage of natural 13 C and 15 N isotope abundance to show there are isotopic differences between healthy and cancer biopsy tissues or between healthy and malignant cultured cell lines. Isotope mass balance further suggests that these differences are mostly rel...
The relative abundance of 13C in this carbon dioxide, measured by nondispersive infrared spectrometry, is then a measure of the 13C abundance in the initial urea sample. Comparison of results of such measurements with those attained by mass spectrometry proves that this procedure is feasible and ...
Here, we took advantage of natural 13C and 15N isotope abundance to show there are isotopic differences between healthy and cancer biopsy tissues or between healthy and malignant cultured cell lines. Isotope mass balance further suggests that these differences are mostly related to lipid metabolism, ...
Data were collected by GCMS solution (Shimadzu), and identified metabolites are shown in Table 1. Mass isotopomer distributions were corrected for natural isotope abundance as previously described (Nanchen et al. 2007). The GC/MS analysis was performed on 3 biological replicates of each sample....
The use of native isotope abundance permitted the study of amendment decomposition under field conditions within a growing season and indicated that dairy manure contributed little to long-term soil C storage.doi:10.2136/sssaj2014.02.0079nCarpenter-Boggs, Lynne A....
2 结果与讨论 2.1 北方不同气候区C3草本植物的δ13C组成特征 图2A显示了中国整个北方地区和各气候分区(干旱 678 植物学报 46(6) 2011 表1 中国北方不同气候区样点信息及其C3草本植物碳同位素值 Table 1 Information of sampling sites and carbon isotope ratios of C3 herbaceous plants in different ...
THE abundance and location of isotopically labelled carbon atoms have been investigated by numerous techniques, but no use has been reported of vibrational spectra for this purpose. This communication describes how the infra-red spectrum of a sample of propene prepared with carbon-13 is consistent ...
Correction of 13C mass isotopomer distributions for natural stable isotope abundance. Des Rosiers, C, Previs, SF, David, F, Brunengraber, H (1996) Correction of 13C mass isotopomer distributions for natural stable isotope abundance. J... CA Fernandez,CD Rosiers,SF Previs,... - 《Journal ...
The overall fluid inclusion population is dominated by primary inclusions, although minor abundance of secondary inclusions is also observed. Type-1 inclusions consist of aqueous carbonic inclusions (Type-I, Fig. 6a–c) while Type-2 inclusions are aqueous biphase inclusions (Type-II, Fig. 6d). ...
Stable carbon and oxygen isotope records in a Middle Jurassic carbonate sequence: implications for paleoenvironment, and sea-level fluctuation, central Saudi Arabia Article20 November 2022 References Altabet, M. A. and Deuser, W. G.: 1985, ‘Seasonal Variations in Natural Abundance of N15in Parti...