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Synthesis, Characterization and Gas Sensing Properties of In(OH)_3 and In_2O_3 Nanorods through Carbon Spheres Template Method

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Journal of Materials Science & Technology 2012年第5期28卷 396-400页

作者： Xifeng Lu Lei Zhang Hui Zhao Kai Yan Yan Cao Lumin Meng Lunan institute of co.l Chemical Engineering Jining 272000China co.lege of Chemistry and Life Sciences Zhejiang Normal UniversityJinhua 321004China Jining institute of Supervision and inspection on product quality Jining 272000China

Poly-crystalline In（OH） 3 nanorods have been successfully prepared via a urea-based precipitation using the co.loidal carbon spheres as the templates. After calcinations, the resulted In 2 O 3 nanorods with poly-crystalline structure were fabricated. Structure and morphology of the product were characterized by X-ray diffraction （XRD）, and transmission electron microsco.y （TEM）. The possible formation process was schemed. The sensor gas properties towards C 2 H 5 OH and co.were examined.

关键词： Nanostructures Self-assembly Characterization Gas sensor

Two-dimensional co.i@mesoporous carbon co.posite with heterogeneous structure toward broadband microwave absorber

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Nano Research 2022年第9期15卷 7769-7777页

作者： Yun Qiu Haibo Yang Fanfan Hu Ying Lin Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials School of Materials Science and EngineeringShaanxi University of Science and TechnologyXi’an 710021China Jiangsu product quality Testing&inspection institute Nanjing 210007China

co.structing co.posites with heterogeneous structure and dual loss mechanism shows great potential in designing microwave *** this work,two-dimensional co.alt and nickel alloys@mesoporous carbon(co.i@MC)co.posites were co.structed via using co.i layered double hydroxide@mesoporous polydopamine(co.i LDH@MPDA)as sacrifice *** the pyrolysis process,the MPDA is transformed into mesoporous carbon co.ted the surface of co.i LDH that is further reduced to co.i *** mesoporous structure is co.ducive to the multi-reflection of electromagnetic waves and facilitates optimizing impedance *** interfaces between co.i alloys and mesoporous carbon induce interface *** attenuation mechanism promotes the electromagnetic waves *** maximum reflection loss of co.i@MC co.posite is−70.86 dB and the widest effective absorption bandwidth is 7.74 GHz co.ering almost the entire Ku *** strategy will be a guidance for designing electromagnetic absorbers.

关键词： co.i alloys mesoporous carbon microwave absorption broad efficient frequency

A light-activatable antibiotic with high activation efficiency and unco.promised bactericidal potency in the activated state

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Journal of Leather Science and Engineering 2021年第1期3卷 93-99页

作者： Delong Hou Rui Wang Zhonghui Wang Gaofu Yang Zhou Xu Qi Zeng Yi Chen co.lege of Biomass Science and Engineering Sichuan UniversityChengdu 610065People’s Republic of China chengdu product quality Supervision and inspection institute Chengdu 610065People’s Republic of China School of Life Science and Food Engineering Yibin UniversityYibin 644007People’s Republic of China

Achieving activatable antibiotics represents one promising solution to tackle the occurrence of side effects,one major issue now plaguing antibiotic usage in co.lagen-based *** co.siderable effort,however,rationale design of activatable antibiotics that display high activation efficiency and unco.promised bactericidal potency in the activated state remains ***,we demonstrate a design principle that helps to address this *** strategy differs from previous attempts by undersco.ing photolytic removal of a functionality directly co.jugated to the pharmaco.hore of an antibiotic,enabling not only an activation efficiency significantly improved beyond previous light-activatable antibiotics,but also bactericidal activity in the activated state as potent as the parent drug.

关键词： Antibiotic Light Activatable Ciprofloxacin co.lagen Biomaterials

Preparation of ZrB_(2)-ZrO_(2)-SiC co.posite Powder by Carbothermal Reduction from Zirco.

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China's Refractories 2023年第1期32卷 25-29页

作者： TIAN Xuekun ZHOU Chaojie ZHANG Lei ZHAO Fei JIA Quanli LIU Xinhong ZHONG Xiangchong Henan Key Laboratory of High Temperature Functional Ceramics School of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450052China Henan institute of product quality Supervision and inspection Zhengzhou 450004China TRB(Beijing)Trading co. Ltd.Beijing 100010China

Using zirco.,boric acid and carbon black as starting materials,ZrB_(2)-ZrO_(2)-SiC co.posite powder was synthesized by calcining at 1500℃in flowing argon *** effects of the soaking time(3,6 and 9 h)and the addition of additive AlF_(3)(0,0.5%,1.0%,1.5%,2.0%and 2.5%,by mass)on the phase co.position and the microstructure of the synthesized products were *** results show that:(1)ZrB_(2)-ZrO_(2)-SiC co.posite powder can be synthesized by carbothermal reduction at 1500℃in flowing argon atmosphere;ZrB_(2) and ZrO_(2) are granular-like,and SiC crystals are fiberous;(2)with the soaking time increasing,the amount of ZrB_(2) increases,the amounts of m-ZrO_(2) and SiC decrease,and the total amount of non-oxides ZrB_(2),SiC and ZrC gradually increases;the optimal soaking time is 3 h;(3)co.pared with the sample without AlF_(3),the sample with 0.5% AlF_(3) has decreased m-ZrO_(2)amount,noticeably increased ZrB_(2) amount but decreased SiC amount;however,when the addition of AlF_(3) increases from 0.5%to 2.5%,the m-ZrO_(2) amount increases,the ZrB_(2)amount decreases,and the SiC amount changes slightly;the optimum AlF_(3)addition is 0.5%.

关键词： zirco. carbothermal reduction zirco.ium diboride-zirco.ia-silico. carbide co.posite powder

Direct synthesis of N_(2)-unprotected five-memberedcyclic guanidines by regioselective[3+2]annulation of aziridines and cyanamides

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Organic Chemistry Frontiers 2022年第6期9卷 1574-1579页

作者： Chuan-Chuan Wang Xin-Lu Wang Qing-Ling Zhang Juntao Liu Zhi-Wei M Zhi-Jing Liu Ya-Jing Chen School of Pharmaceutical Sciences Key Laboratory of Advanced Drug Preparation TechnologiesMinistry of Education of ChinaCo-Innovation Center of Henan Province for New Drug R&D and Preclinical SafetyZhengzhou University100 Science AvenueZhengzhou 450001HenanChina Faculty of Science Livestock Product Quality Inspection InstituteHenan University of Animal Husbandry and EconomyNo.146 Yingcai StreetZhengzhou 450044HenanChina

A novel and efficient[3+2]annulation of 2-substituted aziridines and N-tosyl cyanamides via a dominoregioselective ring-opening/5-exo-dig cyclization procedure has been developed,allowing the directpreparation of N_(2)-unprotected five-membered cyclic guanidines in good to excellent yields under mildco.ditions without metals and strong ***,the highly biologically interesting urea analoguesco.ld also be co.veniently obtained via hydrolysis of the produced guanidines.

关键词： membered protected guanidine

Effects of Planting Methods on Levels of co.mon Pesticides and Heavy Metals in Dendrobium officinale

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Journal of Northeast Agricultural University(English Edition) 2017年第2期24卷 7-13页

作者： Zheng Xiao-long Zhou Jing-qing Hu Xian-qiao Zhu Zhi-wei Zhang Lin-ping Rice product quality Supervision and inspection Center Ministry of Agriculture Hangzhou 310006 China National Rice Research institute Hangzhou 310006 China Zhejiang Environmental Monitoring Engineering co. Ltd. Hangzhou 310006 China

The levels of co.mon pesticides and heavy metals in Dendrobium officinale grown from 2012 to 2014 were measured, and three planting methods were used in 2014. The quality of plant husbandry improved during the study period. Thirteen types of pesticides were detected in D. officinale grown in 2014 and antimicrobials, including carbendazim, difenoco.azole and azoxystrobin, were evident in 61.53% of plants. These three pesticides co.stituted 72.33% of all the antimicrobials detected. Planting methods affected the levels of pesticides and heavy metals. Trellising in plastic sheds was optimal, being associated with the lowest amounts of both pesticides and heavy metals. Both cadmium（Cd） and lead（Pb） levels were high in treed plants, whereas Cr, As and Cu levels were the highest in potted plants.

关键词： Dendrobium officinale planting pattern pesticide and heavy metal

Lactobacillus fermentum as a new inhibitor to co.trol advanced glycation end-product formation during vinegar fermentation

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Food Science and Human Wellness 2022年第5期11卷 1409-1418页

作者： Qin Li Leibing Li Hanjian Zhu Fan Yang Ke Xiao Lin Zhang Menglin Zhang Yongsheng Peng Chao Wang Dongsheng Li Qian Wu Mengzhou Zhou Key Laboratory of Fermentation Engineering(Ministry of Education) National"111"Center for Cellular Regulation and Molecular PharmaceuticsHubei Key Laboratory of Industrial MicrobiologyCooperative Innovation Center of Industry Fermentation(Ministry of Education&Hubei Province)Hubei University of TechnologyWuhan 430068China Wuhan product quality Supervision and inspection institute Wuhan 430000China

The inhibitory activity of lactic acid bacteria(LAB)toward advanced glycation end-products(AGEs)during vinegar fermentation was studied,and its relationships with the substrate co.sumption,antioxidant capacity,total phenolic co.tent,total flavonoid co.pounds,α-gluco.idase,andα-amylase activity inhibition were *** vinegar was made from rice powder flour by liquid-state fermentation(LSF).The selected LAB strains were separately co.cultivated with Saccharomyces cerevisiae and Acetobacter pasteurianus 1.41 in alco.olic and acetic acid fermentation,*** 3 strains,Lactobacillus fermentum showed the strongest inhibitory effect on the formation of total fluorescent AGEs and carboxymethyl lysine(CML)/carboxyethyl lysine(CEL)in the fermentation *** co.responding mechanisms included the acceleration of substrate co.sumtion,improvement of antioxidant activities,and inhibition ofα-gluco.idase andα-*** addition,the fluorescent AGEs and the CML/CEL were negatively co.related with the antioxidant activities,while theα-gluco.idase andα-amylase activities were positively co.related with the total phenols and total ***,the variety of main flavor co.pounds increased,including esters,alco.ols,phenols and *** results of the study support the potential use of screened LAB strains to inhibit the formation of fluorescent AGEs,CML and CEL on fermented products and in the food processing industry,without associated risks to co.sumers.

关键词： Lactobacillus fermentum Advanced glycation end-product Vinegar fermentation Antioxidant capacity

Analysis of Food Safety Supervision and Spot-Check in Sichuan Province in 2019

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Agricultural Biotechnology 2022年第2期11卷 70-74页

作者： Pengyu CHEN Wei WANG Xueli WU Lili JI Jiamin ZHANG Zhipin ZHAO Rui ZHANG Ting BAI Bo HOU Yixi YANG Lin CHEN Key Lab of Meat Processing of Sichuan Province Chengdu UniversityChengdu 610106China chengdu institute of product quality inspection co. Ltd.Chengdu 610106China

Through the analysis on 211614 batches of samples from 35 categories of food safety supervision and inspection in Sichuan Province by Administration for Market Regulation of Sichuan Province in 2019,four suggestions were finally put *** analysis results showed that in 2019,the overall trend of food safety in Sichuan Province was stable and improved.A total of 30 categories of unqualified samples were detected,and a total of 12135 batches of unqualified samples were detected,with an average sample unqualified rate of 5.73%.Among them,the main problems of unqualified samples were as follows:the use of food additives beyond the sco.e and limit,acco.nting for 40.17%of the total number of unqualified samples,microbial co.tamination in food,acco.nting for 23.61%of the total unqualified samples,the residue index of agricultural and veterinary drugs in food not meeting the standard,acco.nting for 15.61%of the total unqualified samples,the quality index in food not meeting the standard,acco.nting for 8.51%of the total number of unqualified samples,and heavy metals and other pollutants in food exceeding the standard,acco.nting for 7.10%of the total unqualified samples.

关键词： Sichuan Food safety Supervision and spot-check Reco.mendations

Analysis and co.parison of Safety and Fatigue co.fort of Postal Bicycles Based on Finite Element Method and sEMG

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Transactions of Tianjin University 2013年第4期19卷 272-278页

作者：项忠霞李亚南田冠常振元 Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education Tianjin University Tianjin Golden Wheel Bicycle Group co. Ltd.

The safety and the fatigue co.fort were co.pared between a domestic and a Japanese postal bicycle. Firstly, the fatigue co.fort of these two kinds of bicycles was evaluated by surface electromyographic signal (sEMG) experiment, in which human lower limb muscle groups were research objects, and the average EMG (AEMG) index and median frequency (MF) were chosen as the evaluation indexes. Seco.dly, the safety of these two kinds of bicycle frames was analyzed and co.pared by using the finite element analysis. The results show that the riding fatigue co.fort of the Japanese postal bicycle is better, and the Japanese postal bicycle frame is more safe and reasonable although both the postal bicycles meet the requirement for strength. Finally, based on the above analysis, the frame structure and related parameters of the domestic postal bicycle were improved with reference to the Japanese postal bicycle and biomechanics theory.

关键词： postal bicycle surface electromyogram signal evaluation index fatigue co.fort finite element analysis