4篇
您的检索式：作者名="She Yongxin"
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| 1 | A highly sensitive bio-barcode immunoassay for multi-residue detection of organophosphate pesticides based on fluorescence antiquenching显示文摘Balancing the risks and benefits of organophosphate pesticides(OPs)on human and environmental health relies partly on their accurate measurement.A highly sensitive fluorescence anti-quenching multi-residue bio-barcode immunoassay was developed to detect OPs(triazophos,parathion,and chlorpyrifos)in apples,turnips,cabbages,and rice.Gold nanoparticles were functionalized with monoclonal antibodies against the tested OPs.DNA oligonucleotides were complementarily hybridized with an RNA fluorescent label for signal amplification.The detection signals were generated by DNA-RNA hybridization and ribonuclease H dissociation of the fluorophore.The resulting fluorescence signal enables multiplexed quantification of triazophos,parathion,and chlorpyrifos residues over the concentration range of 0.01-25,0.01-50,and 0.1-50 ng/mL with limits of detection of 0.014,0.011,and 0.126 ng/mL,respectively.The mean recovery ranged between 80.3% and 110.8% with relative standard deviations of 7.3%-17.6%,which correlate well with results obtained by liquid chromatography-tandem mass spectrometry(LC-MS/MS).The proposed bio-barcode immunoassay is stable,reproducible and reliable,and is able to detect low residual levels of multi-residue OPs in agricultural products. | Lingyuan Xu Xiuyuan Zhang A.M.Abd El-Aty Yuanshang Wang Zhen Cao Huiyan Jia J.-Pablo Salvador Ahmet Hacimuftuoglu Xueyan Cui Yudan Zhang Kun Wang Yongxin She Fen Jin Lufei Zheng Baima Pujia Jing Wang Maojun Jin Bruce D.Hammock | 2022 | Journal of Pharmaceutical Analysis2022，12，4： | 1 |
| 2 | Class-specif- ic molecularly imprinted polymers for the selective extrac- tion and determination of sulfonylurea herbicides in maize samples by high-performance liquid chromatography-tan- dem mass spectrometry显示文摘 | She Yongxin Cao Weiqiang Shi Xiaomei | 2010 | Journal of Chromatography B2010，878，23： | 1 |
| 3 | Determination of Melamine Using Magnetic Molecular Imprinted Polymers And High Performance Liquid Chromatography显示文摘 | Miao Wang Yongxin She Xinwei Du | 2013 | Analytical Letters2013，，46： | 1 |
| 4 | Artificial Esterase Based on Self-assembly Gel Microspheres Constructed from Chitosan and Amino Acids显示文摘A novel artificial esterase based on chitosan and amino acids was synthesized in the present study. The Fmoc-His and Glu were linked to chitosan by active ester method(AEM). The hydroxide radical in chitosan, imidazole group of Fmoc-His and carboxyl from Glu formed a catalytic center of natural esterase. Gel microspheres were coated with a protective layer and a supporting layer by seiassembly construction function in carboxymethylcellulose sodium(CMCS) solution. As for catalytic activity, chitosan-His-Glu was found to be more efficient than chitosan- His and chitosan-Glu in mimicking the core catalytic sites of natural esterase, and the best ratio(mass ratio) of chitosan-His-Glu:CMCS was 1:3. Furthermore, metal ions, such as Ca^2+, Mg^2+, Fe^2+, etc., were able to improve the catalytic efficiency of artificial esterase. And tlie Lineweaver-Burk plot indicated that the catalytic kinetics of artificial esterase conformed to Michaelis-Menten equation. | CAO Jing WANG Miao CHEN Weihua SHE Yongxin WANG Jing WANG Fengzhong LAO Shuibing | 2019 | Chemical Research in Chinese Universities2019，35，3： | 0 |
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