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| 1 | Simultaneous Screening of 733 Pesticide Residues in Fruits and Vegetables by a GC/LC-Q-TOFMS Combination Technique显示文摘In this paper,we report the construction of two accurate mass databases and the development of a combination detection method that simultaneously screens for 733 pesticide and chemical contaminant multi-residues via high-throughput liquid chromatography(LC)-and gas chromatography(GC)-quadru pole-time-of-flight mass spectrometry(Q-TOFMS).This work demonstrates that electronic mass spectral standards may replace chemical-source standard materials as references through one sample preparation and the combination of GC/LC-Q-TOFMS screening.This cutting-edge technique has also replaced multiresidue determination using targeted detection with non-targeted screening.The pesticide residue types,sensitivity,recovery,and reproducibility of this combination technique are evaluated in eight fruit and vegetable matrices.This technique shows three advantages:①In comparison with the discovery capability of a single technique,the combination technique shows an improvement of 51.1%(GC-QTOFMS)and 39.6%(LC-Q-TOFMS),respectively;②the combination technique can satisfy a screening limit lower than 10μg·kg^-1 and meet the requirements of“uniform standards,”although some of the pesticide residues could be optimized to further improve screening sensitivity;③over 488 pesticides with recoveries between 60%-120%and relative standard deviation(RSD)<20%at a spiked level of 10μg·kg^-1 were detected with the combination technique in eight different matrices.From 2012 to 2017,this combination technique was applied in an investigation to screen pesticide residues from 1384 sampling locations for 38138 batched samples covering 18 categories and 134 types of fruits and vegetables obtained from across the mainland of China.After statistical analysis,533 pesticides in 115891 determinations were detected,and the regularity of pesticides in the fruits and vegetables sold on the Chinese market was shown. | Guofang Pang Qiaoying Chang Ruobin Bai Chunlin Fan Zijuan Zhang Hongyuan Yan Xingqiang Wu | 2020 | Engineering2020，6，4： | 11 |
| 2 | An Optimal CDG Framework for Energy Efficient WSNs显示文摘Compressed sensing(CS) has been applied widely in Wireless sensor networks(WSNs) recently.An optimal Compressed data gathering(CDG) framework for energy efficient WSNs is proposed here. A novel Measurement matrix optimization algorithm(MMOA) is proposed for compressed data measurement in WSNs. Diffusion wavelet transform matrix(DWTM) is chosen for sparse representation of the compressed data. An Optimal data aggregation tree(ODAT) algorithm is presented based on CS and routing technology. MMOA is to reduce the data transmissions under the same data reconstruction ratio. DWTM is to make the original data become more sparse and to increase the compressed data reconstruction ratio. The main purpose of ODAT is to minimize the energy consumption of the whole WSNs through the CDG technology and the optimal route. We validate the efficiency of the proposed CDG framework based on MMOA, DWTM and ODAT through extensive experiments. | YAN Wenjie DONG Yongfeng ZHANG Suqi WANG Zijuan | 2017 | Chinese Journal of Electronics2017，26，1： | 2 |
| 3 | Modulation of host signaling in the inflammatory response by enteropathogenic Escherichia coli virulence proteins显示文摘为了成功地感染,招待房间并且躲避主机免疫者反应,一个类型 III 分泌物系统(T3SS ) 被伤寒通常使用细菌的病原体象 enteropathogenic Escherichia coli (EPEC ) 那样。最近的调查结果表明了各种各样的受动器通过 T3SS 被注入主人房间并且在煽动性的发信号的小径上施加禁止的效果,破坏对这些病原体的有免疫力的回答。这里,我们考察针对探讨 EPEC 受动器蛋白质调制的几条重要煽动性的发信号小径的调整的最近的研究,例如原子 factor-B ( NF-B )和 激活mitogen 的蛋白质 kinase ( MAPK )小径,它在这块未经勘探的地和帮助里提供卓见进未完成的工作为 EPEC 受动器在煽动性的发信号的网络识别新奇位置。 | Xiaonan Zhuang Zijuan Chen Chenxi He Lin Wang Ruixue Zhou Dapeng Yan Baoxue Ge | 2017 | Cellular & Molecular Immunology2017，14，3： | 1 |
| 4 | Redox-neutral dehydrogenative cross-coupling ofalcohols and amines enabled by nickel catalysis显示文摘Presented herein is a facile and straightforward synthetic method for the construction of amides via Ni/NHC-catalyzed amidation of alcohols with amines. The strategy exhibits various advantages over existingmethods, including base metal catalysis, commercially available catalyst, removal of oxidant, good yields(up to 95%), good functional group tolerance and substrate generality. Moreover, the nature of the reaction was revealed by NMR spectroscopy and isolation of intermediates. | Zijuan Yan Feipeng Liu Xuchao Wang Qing Qiang Yongjie Li Yao Zhang Zi-Qiang Rong | 2022 | Organic Chemistry Frontiers2022，9，6： | 0 |
| 5 | Transition metal-catalyzed conversion of aldehydes to ketones显示文摘Ketones are one of the most important classes of organic compounds, and widely present in various pharmacological compounds, biologically active molecules and functional materials. Over the past few decades, transition metal-catalyzed conversion of aldehydes has been found to be a powerful method.With the continuous development in recent years, it has become an efficient and uncomplicated strategy for constructing ketones. There are four major mechanisms for transition metal-catalyzed ketone synthesis from aldehyde:(1) carbonyl-Heck reaction, that is 1,2-insertion of organometal species to aldehydic C=O double bond,(2) direct insertion of transition metal catalysts to aldehydic C-H bond,(3) aldehyde as acyl radical,(4) aldehyde as carbon radical acceptor. This article summarizes related reports on the transformations of aldehydes to generate corresponding ketones under different reaction conditions. | Zijuan Yan Pan-Lin Shao Qing Qiang Feipeng Liu Xuchao Wang Yongjie Li Zi-Qiang Rong | 2022 | Chinese Chemical Letters2022，33，3： | 0 |
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