Yang Guo and her husband Meipu Ganpang used to struggle to make ends meet as farmers in Huyu, a township in southwest China’s Yunnan Province. Poverty eventually broke up their family, forcing Meipu to become a migrant worker in distant cities with more job opportunities, leaving his wife and two children at home. 相似文献
Ultra‐high‐performance supercritical fluid chromatography (UHPSFC ) is an efficient analytical technique and has not been fully employed for the analysis of cannabis. Here, a novel method was developed for the analysis of 30 cannabis plant extracts and preparations using UHPSFC /PDA ‐MS . Nine of the most abundant cannabinoids, viz . CBD , ?8‐THC , THCV , ?9‐THC , CBN , CBG , THCA ‐A, CBDA , and CBGA , were quantitatively determined (RSD s < 6.9%). Unlike GC methods, no derivatization or decarboxylation was required prior to UHPSFC analysis. The UHPSFC chromatographic separation of cannabinoids displayed an inverse elution order compared to UHPLC . Combining with PDA ‐MS , this orthogonality is valuable for discrimination of cannabinoids in complex matrices. The developed method was validated, and the quantification results were compared with a standard UHPLC method. The RSD s of these two methods were within ±13.0%. Finally, chemometric analysis including principal component analysis (PCA ) and partial least squares‐discriminant analysis (PLS ‐DA ) were used to differentiate between cannabis samples. 相似文献
Scholarly influence in criminology and criminal justice (CCJ) is not a new topic. However, in terms of international scholarly influence in Chinese criminology, there still exists no relevant literature, though emphasis on studying China has been increasingly recognized by the international criminological academy. The current study conducts a comprehensive analysis of 191 CCJ articles on China from 20 mainstream CCJ journals and locates those who have done work on Chinese criminology. By productivity and citation analysis, we obtain several rankings of the scholarly influence in Chinese criminology. The most prolific individual identified by the current study is Jianhong Liu; the most productive institution is the City University of Hong Kong; the most-cited scholar is Steven Messner, and the most-cited work is Policing and Punishment in China: From Patriarchy to ‘The People’ by Michael Dutton. Though the current study focuses on Chinese criminology, few local mainland Chinese scholars and publications in Chinese are among the dominant contributions.
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