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Food Quality and Safety 2024年第1期8卷 179-189页

作者： Wenjun Wu luman zheng Jiahao Yu Liming Liu Gulden Goksen Ping Shao Department of Food Science and Technology Zhejiang University of TechnologyZhejiangHangzhouChina Department of Food Technology Vocational School of Technical Sciences at Mersin Tarsus Organized Industrial ZoneTarsus UniversityMersinTurkey Eco-Industrial Innovation Institute ZJUT Zhejiang University of TechnologyZhejiangQuzhouChina

The enhancement of the sensitivity for anthocyanin-based indicator films in food freshness monitoring in real time is important for *** this study,hydrophilic silica aerogel(SiO2 NA)was incorporated into corn starch(CS)/chitosan(CH)/rose anthocyanins(RACNs)-encapsulated potato amylopectin nanoparticles(APNPs)composite film to increase the sensitivity for shrimp freshness *** microstructure of films revealed that the gas absorption capacity was improved by amorphous SiO2 NA via hydrogen *** pore size(1.74–5.60 times),pore volume(3.92–5.60 times),and specific surface area(2.21–2.34 times)of films increased with the addition of SiO2 *** sensing of NH3 and pH and the reversibility of films were also ***,the pH-responsive films containing SiO2 NA changed visibly in color from purple–red to orange–gray and finally to gray,enabling effective monitoring of shrimp freshness during storage at 4°***,anthocyanin-based indicator films with improved sensitivity by adding SiO2 NA were successfully designed for monitoring shrimp freshness.

关键词： Hydrophilic silica aerogel anthocyanins sensitivity pH-responsive shrimp freshness intelligent packaging

Cerium and carbon-sulfur codoped mesoporous TiO_(2)nanocomposites for boosting visible light photocatalytic activity

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Journal of Rare Earths 2023年第4期41卷 539-549页

作者： Fei zheng Faqin Dong Lin Zhou Jieyu Yu Xijie Luo Xingyu Zhang Zhenzhen Lv luman Jiang Yuheng Chen Mengqing Liu Key Laboratory of Solid Waste Treatment and Resource Recycle Southwest University of Science and TechnologyMianyang 621010China College of Science Xichang UniversityXichang 615000China School of Environment and Resource Southwest University of Science and TechnologyMianyang 621010China

Ce and C-S codoped mesoporous TiO_(2)nanocomposites were synthesized via a sol-gel method integrated with an evaporation-induced self-assembly *** basic physicochemical characteristics of the synthetic samples were analyzed via a series of characterization *** results reveal that C-S and Ce codoping on mesoporous TiO_(2)enhances the photocatalytic activity owing to the synergistic effect caused by narrowing the band gap,enhancing adsorption,trapping and transferring the excited e^(-)/h^(+)pairs and suppressing the recombination of e^(-)/h^(+)***,the obtained C,S-TiO_(2)/CeO_(2)materials exhibit large specific surface areas and numerous pores which not only effectively improve the adsorption-enrichment capability,but also supply multi-dimensional mass and electron transfer *** photodegradation efficiency of RhB by C,S-TiO_(2)/CeO_(2)within 40 min is nearly 100%,and its degradation efficiency is 6.63 times that of undoped TiO_(2).Recycling experiments show that mesoporous C,S-TiO_(2)/CeO_(2)shows excellent recoverability and ***,by trapping experiments,·O_(2)e^(-)/h^(+)and·OH are the predominant active species and a possible reaction mechanism is proposed.

关键词： Photocatalysis Mesoporous TiO_(2) C-S codoping Ce doping Water remediation Rare earths

Rapid Screening of 26 Organophosphorus Pesticides in Fresh Milk by Ultra Liquid Chromatography Coupled With Quadrupole-Time of Flight Mass Spectrometry

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Agricultural Biotechnology 2021年第5期10卷 131-133页

作者： Yi LI luman HUO Lei WANG Lixue DONG Aijun LI Yi ZHANG Baiqin zheng Tangshan Food and Drug Comprehensive Testing Center Tangshan 063000China Hebei Agricultural Products quality and safety testing Innovation Center Tangshan 063000China Tangshan Institute of Industrial Technology for functional agricultural products Tangshan 063000China

[Objectives]A rapid screening and analysis method for 26 organophosphorus agrochemicals in fresh milk was established using ultra performance liquid chromatography coupled with quadrupole-time of flight mass spectrometry.[Methods]Raw milk was extracted with acetonitrile solution containing 0.2%formic acid by volume,and purified with a Dikma ProElut QuECHERS solid phase extraction *** compounds were separated on a Waters ACQUITY UPLC HSS T3 chromatographic column(2.1 mm×50 mm,1.8μm)with methanol-water solution as a mobile phase for gradient elution,and through scanning with an electrospray ion source in positive ion mode,26 kinds of organophosphorus agrochemicals could be accurately qualitatively determined within 10 min.[Results]When using formic acid acetonitrile with a volume fraction of 0.2%,there were more types of detected compounds and a greater recovery;and using B cartridge could effectively eliminate the interference of non-polar substances such as phospholipids,achieve higher number of detected compounds than those of A and C,and well separate the 26 kinds of agrochemical residues.[Conclusions]This study provides a reference method for the rapid screening of agrochemical residues in dairy cows in the future.

关键词： Ultra Liquid chromatography coupled with quadrupole-time of flight mass spectrometry(UPLC-Q-TOF-MS) Fresh milk Organophosphorus agrochemicals Rapid screening

Study on Factors Affecting Aerobial Plate Count in Raw Milk

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Agricultural Biotechnology 2023年第5期12卷 49-51页

作者： luman HUO Yi LI Baiqin zheng Aijun LI Yanhui PAN Wang SONG Yunfei LIU Miaoyi ZHANG Xujian zheng Tangshan Food and Drug Comprehensive Testing Center Tangshan 063000China Tangshan Institute of Industrial Technology for Functional Agricultural Products Tangshan 063000China

[Objectives]This study was conducted to investigate the main factors affecting the aerobial plate count in raw milk.[Methods]Drinking water,medicated baths and raw milk under different storage and transportation conditions were detected for the values of aerobial plate count to analyze their effects on the aerobial plate count in raw milk.[Results]Disinfection of drinking water tanks could significantly reduce the aerobial plate count in *** use of medicated baths before and after milking could effectively reduce the aerobial plate count and had a significant bactericidal *** growth of microorganisms in raw milk stored below 4℃was relatively *** disinfecting drinking water tanks and disinfecting nipples before and after milking could reduce the aerobial plate count in the tanks and *** raw milk was extruded,the temperature should decrease to 0-4℃within 2 h,and the storage time should not exceed 48 h,which could effectively control the aerobial plate count in raw milk.[Conclusions]This study provides a reference for scientific control of the aerobial plate count in raw milk.

关键词： Raw milk Aerobial plate count Drinking water Medicated bath Temperature

Effects of Whole-plant Corn Silage and Whole-plant Wheat Silage on Growth Performance and Economic Benefits of Beef Cattle

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Agricultural Biotechnology 2023年第2期12卷 51-53页

作者： Jian HU luman HUO Yuqi LIU zhenguo ZHANG Tong WU Qianqian CONG Yuping LIU Baiqin zheng Zhongce YUAN Xueliang PANG Tangshan Food and Drug Comprehensive Inspection and Test Center Tangshan 063000China Tangshan Academy of Functional Agricultural Products Industrial Technology Tangshan 063000China Academician Workstation of Tangshan Food and Drug Comprehensive Inspection and Test Center Tangshan 063000China

[Objectives]This study was conducted to study the effects of whole-plant corn silage and whole-plant wheat silage on growth performance and economic benefits of beef cattle.[Methods]Thirty Simmental crossbred cattle were selected and randomly divided based on their weight into two groups,15 cows in each group,with an average weight of 398 *** group was fed the same concentrated feed,and the whole-plant corn silage and wheat silage were fed as roughage feed,*** experimental period was 90 d.[Results](1)There was no significant difference in the initial weight of beef cattle between test group 1 and test group 2(P>0.05).Compared with group 2,group 1 had a higher final weight,average daily gain,and dry matter intake of beef cattle,without significant differences(P>0.05).Group 1 was 0.58%,1.99%,and 1.43%higher than group 2,*** feed-to-gain ratio of test group 1 decreased by 0.54%compared with test group 2(P>0.05),with no significant difference therebetween.(2)The economic benefit of group 1 was 11.45 yuan/(day·capita),while the economic benefit of group 2 was 2.41 yuan/(day·capita),and group 1 was 9.04 yuan/(day·capita)higher than group 2.[Conclusions]Whole-plant corn silage for feeding beef cattle has the advantages of good weight gain and low breeding cost,and can be popularized in beef cattle fattening.

关键词： Whole-plant corn silage Whole-plant wheat silage Growth performance Economic performance

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基于PLC的小区恒压供水智能控制系统设计

无线互联科技 2023年第13期20卷 41-44页

作者：宋曙光郑小海王露曼孙浩毓西京学院陕西西安710123 陕西可控中子源工程技术研究中心陕西西安710123

随着城市化进程的不断发展,促进了小区的建设,供水系统的建设是小区诸多基础设施中不可或缺的内容。传统的供水系统存在着自动性差、成本高、操作性差、监管性差等诸多问题,不能较好地满足小区对供水的需求。针对传统供水系统的问题,文... 详细信息

随着城市化进程的不断发展,促进了小区的建设,供水系统的建设是小区诸多基础设施中不可或缺的内容。传统的供水系统存在着自动性差、成本高、操作性差、监管性差等诸多问题,不能较好地满足小区对供水的需求。针对传统供水系统的问题,文章设计了一套基于PLC的小区恒压供水智能控制系统,该系统以三菱PLC为核心控制器,并配备变频器对三台水泵的工作状态和数量进行控制,为了操作和监管方便,加入了上位机MCGS组态进行监控,能较好地满足小区用户的用水需求。文章主要介绍了恒压供水智能控制系统的总体设计、硬件设计、软件设计。

关键词：恒压供水 PLC 变频器 MCGS

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多路无线语音抢答器设计与实现

无线互联科技 2023年第8期20卷 56-59页

作者：王露曼郑小海宋曙光高景煜西京学院陕西西安710123 陕西可控中子源工程技术研究中心陕西西安710123

随着各种比赛的增多,抢答器的应用和需求越来越多,它所起到的作用备受关注。尤其在智力活动中,“抢答”是一种十分普遍的、紧张有趣且具有教育意义的游戏。文章重点对基于52系列单片机构成的无线抢答器的整体设计、电路模块及功能进行... 详细信息

随着各种比赛的增多,抢答器的应用和需求越来越多,它所起到的作用备受关注。尤其在智力活动中,“抢答”是一种十分普遍的、紧张有趣且具有教育意义的游戏。文章重点对基于52系列单片机构成的无线抢答器的整体设计、电路模块及功能进行了详述,设计的抢答器除了具备基本的抢答功能外,还具有无线传输、定时报警、液晶屏显示以及语音提示的功能。

关键词：单片机定时抢答语音电路无线发射和接收

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禽蛋中甲硝唑残留的固相萃取-高效液相色谱-串联质谱检测方法建立

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中国动物检疫 2022年第9期39卷 134-139页

作者：李宁肖琎苑中策董洁琼王圆圆郑百芹李艺霍路曼张谊汤思凝庞学良葛凯李文杰雷舒涵李明阳张书宏郝立武唐山市食品药品综合检验检测中心河北唐山063000 遵化市畜牧水产技术服务中心河北遵化064200 唐山市农业综合行政执法支队河北唐山063000

为建立优化固相萃取-高效液相色谱-串联质谱法测定禽蛋中甲硝唑残留的方法,以甲硝唑-D4为内标,将禽蛋样品(鸡蛋、鸭蛋、鹅蛋、鹌鹑蛋)用10 mL乙酸乙酯-甲醇(体积比19:1)进行提取离心,将上清液氮吹后用4 mL乙腈-水(体积比4:1)复溶,用PRiM... 详细信息

为建立优化固相萃取-高效液相色谱-串联质谱法测定禽蛋中甲硝唑残留的方法,以甲硝唑-D4为内标,将禽蛋样品(鸡蛋、鸭蛋、鹅蛋、鹌鹑蛋)用10 mL乙酸乙酯-甲醇(体积比19:1)进行提取离心,将上清液氮吹后用4 mL乙腈-水(体积比4:1)复溶,用PRiME HLB固相萃取柱净化;以Kinetex F5五氟苯基色谱柱分离,0.1%甲酸水和0.1%甲酸乙腈为流动相进行梯度洗脱,在电喷雾离子源(ESI)正离子模式下,采用多反应监测模式(MRM)进行检测,以内标法进行定量分析。结果显示:甲硝唑标准溶液在0.1~50.0μg/L范围内呈现良好的线性关系,相关系数(R2)为0.99981;甲硝唑在禽蛋中的检出限(LOD)和定量限(LOQ)分别为0.15μg/kg和0.50μg/kg,回收率为93.70%~106.83%,相对标准偏差(RSD)为1.66%~3.80%。结果表明,本研究建立的方法前处理过程简单,易于操作,结果准确,适合大批量不同种类禽蛋样品的检测,能够满足禽蛋中甲硝唑残留风险监测的需求。

关键词：甲硝唑固相萃取高效液相色谱-串联质谱法禽蛋

液相色谱-飞行时间质谱法快速筛查生乳中29种兽药残留的研究

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中国乳业 2021年第12期 100-104页

作者：霍路曼李艺郑百芹李明阳张淼怡郝立武张书宏河北省唐山市食品药品综合检验检测中心河北省农产品质量安全检测工程技术研究中心河北唐山063000

本文研究了用液相色谱串联飞行时间质谱建立生乳中29种兽药残留的快速检测方法。生乳样品采用0.2%甲酸乙腈溶液提取上清液,采用Dikma ProElut QuECHERS净化管净化后测定。目标化合物通过Waters ACQUITY UPLC HSS T3色谱柱分离,以乙腈和1... 详细信息

本文研究了用液相色谱串联飞行时间质谱建立生乳中29种兽药残留的快速检测方法。生乳样品采用0.2%甲酸乙腈溶液提取上清液,采用Dikma ProElut QuECHERS净化管净化后测定。目标化合物通过Waters ACQUITY UPLC HSS T3色谱柱分离,以乙腈和1.0%甲酸水溶液为洗脱剂进行程序洗脱,正离子扫描模式检测。结果表明,通过对数据进行靶向分析,20.0 min内生乳中29种兽药残留能够同时被检测出来,其中Mass Error在±2.0 mg/kg之内,Library Score得分均在90分以上,准确性高,操作简便。

关键词：液相色谱-飞行时间质谱生乳兽药残留测定

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百子湾公租房

建筑实践 2022年第2期5卷 54-61页

作者：无何晓康郑程文尚立徐琛李广崇王德元郑芳童尚仁 Mujung Kang 张庭辅张龙张凯 Kazushi Miyamoto Yukan Yanagawa 余志鹏 Tomasz Czarnecki Davide Signorato Natalia Giacomino Sear Nee 袁铁雯 Steven Chaffer Park Dookee Chung Hiroki Fujino 姜雪竹陈曼 Dina Khaki 杨雪兵 MAD建筑事务所不详

百子湾公租房是MAD建筑事务所的第一个社会住宅项目,MAD希望能够在具体实践中突破常规,用设计推动中国社会住宅创新,让空间和建筑服务于人,使庞大的社区消融于城市和居民的生活,唤醒住宅的社会性,解决目前中国城市快速发展中关于居住的... 详细信息

百子湾公租房是MAD建筑事务所的第一个社会住宅项目,MAD希望能够在具体实践中突破常规,用设计推动中国社会住宅创新,让空间和建筑服务于人,使庞大的社区消融于城市和居民的生活,唤醒住宅的社会性,解决目前中国城市快速发展中关于居住的一系列具体问题。

关键词：公租房建筑事务所社会住宅住宅项目城市快速发展社会性