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大豆活性肽对黄羽肉鸡生长性能、屠宰性能、肉品质、免疫功能及抗氧化能力的影响

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动物营养学报 2024年第4期36卷 2292-2302页

作者：彭涵陈家磊杨礼熊霞刘思洋朱师良杨朝武余春林张增荣邱莫寒胡陈明夏波宋小燕四川省畜牧科学研究院动物遗传育种四川省重点实验室成都610066

本文旨在研究大豆活性肽对黄羽肉鸡生长性能、屠宰性能、肉品质、免疫功能及抗氧化能力的影响。选用1日龄健康大恒黄羽肉鸡公鸡800只,随机分成5组,每组10个重复,每个重复16只鸡。对照组饲喂基础饲粮,抗生素组饲喂基础饲粮+0.2 g/kg恩拉... 详细信息

本文旨在研究大豆活性肽对黄羽肉鸡生长性能、屠宰性能、肉品质、免疫功能及抗氧化能力的影响。选用1日龄健康大恒黄羽肉鸡公鸡800只,随机分成5组,每组10个重复,每个重复16只鸡。对照组饲喂基础饲粮,抗生素组饲喂基础饲粮+0.2 g/kg恩拉霉素,试验组分别饲喂以0.2%、0.4%、0.6%的大豆活性肽替代基础饲粮中豆粕的试验饲粮。试验期70 d。结果表明:1)抗生素组和0.2%大豆活性肽组的末重、平均日增重显著高于对照组(P0.05)。2)各组之间屠宰率、全净膛率、半净膛率、胸肌率、腿肌率和腹脂率无显著差异(P>0.05)。3)各组之间血常规指标无显著差异(P>0.05)。4)0.2%大豆活性肽组的胸肌45 min肉色显著高于对照组、抗生素组和0.4%大豆活性肽组(P0.05)。5)抗生素组和0.2%、0.4%、0.6%大豆活性肽组的血清溶菌酶含量显著高于对照组(P0.05)。7)抗生素组和0.2%大豆活性肽组的血清总抗氧化能力(T-AOC)显著高于对照组(P0.05)。由此可见,饲粮中添加0.2%大豆活性肽可提高黄羽肉鸡生长性能和免疫功能,改善肉品质和增强机体抗氧化能力,且具有替代抗生素的作用。

关键词：大豆活性肽黄羽肉鸡生长性能屠宰性能肉品质免疫功能抗氧化性能

Mechanism of conductive powder microstructure evolution in the process of SPS

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Science China(Technological Sciences) 2005年第3期48卷 258-269页

作者： song xiaoyan LIU Xuemei ZHANG Jiuxing College of Materials Science and Engineering Key Laboratory of Advanced Functional Materials of Ministry of Education of ChinaBeijing University of TechnologyBeijing 100022China College of Materials Science and EngineeringKey Laboratory of Advanced Functional Materials of Ministry of Education of ChinaBeijing University of TechnologyBeijing 100022China College of Materials Science and EngineeringKey Laboratory of Advanced Functional Materials of Ministry of Education of ChinaBeijing University of TechnologyBeijing 100022China

Spark plasma sintering (SPS) is an advanced sintering technology that has been recently developed in the world. Contrast to many reports about experimental investigations on the methods of new materials preparation, there are very few systematic studies on the special sintering mechanism of SPS technology. In the present paper, by using the pure electrolytic copper powders as the raw material, a series of sintering experiments have been designed and carried out. The evolution of the powder microstructures during SPS has been systematically studied, and for the first time a “self-adjusting mechanism” of the microstructure evolution is proposed, from which the essential for the advantages of materials preparation by SPS in the respects of high density, homogeneity and fine grain structure can be well understood. In addition, the changes of the relative density during SPS are quantitatively predicted by a theoretical model and confirmed by the experimental measurements.

关键词： spark plasma sintering,microstructure evolution,sintering mechanism.

Phase stability and magnetic performance of nanocrystalline Sm-Co supersaturated solid solution

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Science China(Technological Sciences) 2018年第1期61卷 129-134页

作者： LIU Dong LIU XueMei LIU GuoQuan song xiaoyan College of Materials Science and Engineering Key Laboratory of Advanced Functional Materials Ministry of Education of China Beijing University of Technology Beijing 100124 China Collaborative Innovation Center of Steel Technology University of Science and Technology Beijing Beijing 100083 China

A new type of Sm-Co supersaturated solid solution has been developed with a stabilized TbCu7-type structure. The high-Co single phases were stabilized in a wide temperature range in the prepared SmCo9.8.xSix(x=0–0.9) alloys by concurrent nanostructuring and Si-doping. The significant enhancement of the coercivity and remanence of the new type supersaturated solid solution are attributed to the effective pinning of the ultrafine nanograin boundaries and the high magnetocrystalline anisotropy of the solid solution. It was proposed that the high-temperature magnetic properties of the Sm-Co supersaturated solid solution depend strongly on the phase stability.

关键词： supersaturated solid solution nanocrystalline doping phase stability

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基于MEMS传感器的线路电压测量方法研究

工业仪表与自动化装置 2024年第3期 123-127页

作者：栗晓政崔凤庆宋晓燕梁纲樊彦国邱震辉杨庆国网河南省电力公司电力科学研究院河南郑州450018 国网河南省电力公司河南郑州450018 重庆大学电气工程学院输变电装备技术全国重点实验室重庆400044

MEMS电场传感器体积小、功耗低,应用于非侵入式电压测量技术中可以有效减小装置测量体积、成本,契合当前分布式测量需求。因此该文设计了一种基于MEMS电场传感器的电压测量方案,首先介绍了MEMS电场传感器的工作原理,其次针对传感器结构... 详细信息

MEMS电场传感器体积小、功耗低,应用于非侵入式电压测量技术中可以有效减小装置测量体积、成本,契合当前分布式测量需求。因此该文设计了一种基于MEMS电场传感器的电压测量方案,首先介绍了MEMS电场传感器的工作原理,其次针对传感器结构特点基于电容分压原理设计了电压测量方案,并进一步分析其等效电路模型,最后对该测量方案进行了可行性和准确性测试。结果表明设计的测量方案能在1~10 kV内准确地反演工频电压,测量的最大幅值偏差为2.21%。该文提出的非侵入式电压测量方案搭载简便,能够稳定的对线路电压进行测量,为架空线路电压的实时监测提供可靠的技术手段。可以为线路电气量参数实时测量提供可靠的数据支撑。

关键词： MEMS传感器耦合电容电压测量输电线路

清远麻鸡miR-142-3p分析及其关键靶基因的筛选

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中国农业大学学报 2024年第7期29卷 12-22页

作者：朱师良余春林邱莫寒张增荣熊霞胡陈明杨礼彭涵陈家磊宋小燕夏波杨朝武四川省畜牧科学研究院动物遗传育种重点实验室成都610066

为分析清远麻鸡不同组织中miR-142-3p的表达情况,并筛选其在脾脏中的关键靶基因,本研究利用在线数据库预测鸡miR-142-3p靶基因,并对靶基因进行GO和KEGG富集分析以及构建蛋白-蛋白互作网络。利用在线公共数据库,分析脾脏相对于其他组织的... 详细信息

为分析清远麻鸡不同组织中miR-142-3p的表达情况,并筛选其在脾脏中的关键靶基因,本研究利用在线数据库预测鸡miR-142-3p靶基因,并对靶基因进行GO和KEGG富集分析以及构建蛋白-蛋白互作网络。利用在线公共数据库,分析脾脏相对于其他组织的miR-142-3p表达量;再根据miRNA表达量与其靶基因表达量负相关机制,对miR-142-3p靶基因与脾脏中相对其他组织显著下调基因取交集,筛选潜在靶基因。结果表明:1)预测获得85个靶基因,GO富集分析显示,靶基因参与多种高分子化合物的合成与转运过程。2)KEGG结果显示富集到MAPK、Notch、Wnt等多条与抗肿瘤免疫相关的信号通路。3)PPI网络共筛选到4个Hub基因。4)miR-142-3p在脾脏中的表达量极显著高于肝脏、肺脏、胸肌、心脏和肾脏(P<0.01)。5)共筛选到TWF1、MYH10、NFIB、FNBP1L和FERMT25个靶基因。综上,鸡miR-142-3p在脾脏中很可能通过TWF1、MYH10、NFIB、FNBP1L和FERMT2发挥生物学功能。本研究为解析鸡miR-142-3p的功能及其分子机制提供了参考和依据。

关键词：清远麻鸡 miR-142-3p 生物信息学组织表达脾脏

Thermodynamic Properties of Nanograin Boundary and Thermal Stability of Nanograin Structure

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Journal of Materials Science & Technology 2009年第4期25卷 475-478页

作者： Jun Wei xiaoyan song Qingchao Han Lingmei Li College of Materials Science and Engineering Key Laboratory of Advanced Functional Materials Ministry of Education Beijing University of Technology Bcijing 100124 China

The thermal features of the nanograin boundary were described by a developed thermodynamic model. Using the nanocrystalline Cu as an example, the pressure, the bulk modulus, and the volume thermal expansion coef- ficient were calculated to characterize the thermodynamic properties of the grain boundaries on the nanoscale. Based on the parabola-type relationship between the excess free energy and the excess volume of the nanograin boundary, the thermal stability, as well as its evolution characteristics, was analyzed. The experimental re- sults of the temperature-varying grain growth in the nanocrystalline Cu, which exhibited the discontinuous nanograin growth behavior, verified the thermodynamic predictions. In addition, the quantitative relationships correlating the excess volume and the lattice expansion with the nanograin size were discussed.

关键词： Thermodynamic properties Thermal stability Nanograin growth Excess volume

广东地区不育男性精液质量与细菌感染关系的研究

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现代医院 2024年第1期24卷 159-161页

作者：彭红波刘晃郑凤娇黄婉玲宋小燕赵文忠广东省生殖科学研究所(广东省生殖医院)、广东省生殖医院国家卫生健康委员会男性生殖与遗传重点实验室广东广州510600 南部战区空军医院广东广州510602

目的研究不育男性精液质量与细菌感染之间的相关性,为指导不育男性人群的生殖健康提供临床依据。方法采集不育男性精液200例作为研究对象,然后进行分离培养48 h,根据培养结果,分为无致病菌生长组、有致病菌生长组、无菌生长组,完成有致... 详细信息

目的研究不育男性精液质量与细菌感染之间的相关性,为指导不育男性人群的生殖健康提供临床依据。方法采集不育男性精液200例作为研究对象,然后进行分离培养48 h,根据培养结果,分为无致病菌生长组、有致病菌生长组、无菌生长组,完成有致病菌生长组细菌耐药性分析,并进行各组间精液质量比较。结果分离培养48 h后,200例精液中无致病菌生长163例,占比81.5%,有致病菌生长33例,占比16.5%,无菌生长4例,占比2.0%;33例有致病菌培养结果前三位依次为大肠埃希菌、无乳链球菌和粪肠球菌,耐药率分别为80.0%、87.5%、100.0%。结论不育男性精液中细菌培养检出率较高,且致病细菌会对精液质量产生影响。

关键词：不育男性精液细菌培养鉴定结果大肠埃希菌无乳链球菌

上海市某区生菜中阪崎克罗诺杆菌的半定量风险评估

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生物加工过程 2024年第3期22卷 349-354页

作者：宋晓燕许莉秦晓杰牛洪梅马悦吴梦洁董庆利上海理工大学健康科学与工程学院上海200093

为了评估上海市某区居民通过生菜暴露阪崎克罗诺杆菌(Cronobacter sakazakii)的健康风险,本文按照微生物风险评估的程序,应用半定量风险评估工具Risk Ranger和sQMRA软件,结合居民膳食消费量数据进行评估。预计上海市某区健康成人每人每... 详细信息

为了评估上海市某区居民通过生菜暴露阪崎克罗诺杆菌(Cronobacter sakazakii)的健康风险,本文按照微生物风险评估的程序,应用半定量风险评估工具Risk Ranger和sQMRA软件,结合居民膳食消费量数据进行评估。预计上海市某区健康成人每人每天因进食污染了阪崎克罗诺杆菌的生菜而患病的概率为1.66×10^(-9),每年发病7.63×10^(-3)例,风险系数为9,健康成人的发病概率很低。说明上海市某区即食生菜中阪崎克罗诺杆菌危害为低风险,可维持现有风险控制措施,但需严格执行生产过程风险监测,制定安全事件发生应急预案,并加强对消费者家庭食品安全的科普宣传。本研究为生菜中致病微生物风险评估补充数据,可供定量风险评估和食源性疾病的防控提供科学参考。

关键词：生菜阪崎克罗诺杆菌半定量风险评估风险评估食源性疾病

Effects of nanoparticles on devitrification and recrystallization of aqueous glycerol and PEG-600 solutions

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中国科学：技术科学英文版 2014年第2期57卷 264-269页

作者： LV FuKou LIU BaoLin LI WeiJie song xiaoyan Institute of Biothermal Science and Technology University of Shanghai for Science and Technology

Nanoparticles in solution offer unique electrical,mechanical and thermal properties due to their physical presence and interaction with the state of dispersion.This work is aimed to study the effects of hydroxyapatite(HA)nanoparticles on the behavior of devitrification and recrystallization of glycerol(60%w/w)and PEG-600(50%w/w)solutions during warming.HA nanoparticles of different sizes(20,40,60 nm)and concentrations(0.1%,0.5%,w/w)were incorporated into solutions,and were studied by calorimetric analysis coupled with cryomicroscopy.The presence of HA nanoparticles has little effect on the devitrification end temperatures,but affects the devitrification onset temperatures of glycerol and PEG-600 solutions.The investigation with the cryomicroscope observed that the ice morphologies of glycerol and PEG-600 solutions are dendritic and spheric respectively.The ice fraction of glycerol solution containing 0.1%HA with the size of 60 nm decreased to 2/5 of that of the solution without nanoparticles at 45°C.The ice fractions of PEG-600 solutions increased significantly between 64°C and54°C,and the ice fraction of PEG-600 solution without nanoparticles increased by 92%within the temperature range.The findings have significant implications for biomaterial cryopreservation,cryosurgery,and food manufacturing.The complexity of ice crystal growth kinetics in nanoparticle-containing solutions awaits further study.

关键词：纳米粒子重结晶作用油溶液甘油晶体生长动力学纳米颗粒低温显微镜含水