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辣椒碱对鹌鹑产蛋性能、血清生化指标和抗氧化能力的影响

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饲料工业 2024年第17期45卷 126-130页

作者：李志伟何连海朱世蝶胡永胜刘杰漯河市农业科学院河南漯河462300 永城市畜牧发展服务中心河南永城476600 河南牧锦生物科技有限公司河南新乡453500

试验旨在研究辣椒碱对鹌鹑产蛋性能、血清生化指标和抗氧化能力的影响。选用320只体重接近、体况良好的84日龄朝鲜鹌鹑随机分成4组,每组5个重复,每个重复16只,对照组饲喂基础日粮,辣椒碱1组、辣椒碱2组和辣椒碱3组分别饲喂基础日粮+60、... 详细信息

试验旨在研究辣椒碱对鹌鹑产蛋性能、血清生化指标和抗氧化能力的影响。选用320只体重接近、体况良好的84日龄朝鲜鹌鹑随机分成4组,每组5个重复,每个重复16只,对照组饲喂基础日粮,辣椒碱1组、辣椒碱2组和辣椒碱3组分别饲喂基础日粮+60、120、240 mg/kg辣椒碱,预试期30 d,正试期120 d。结果显示:与对照组相比,辣椒碱2组产蛋率显著提高(P<0.05),料蛋比显著降低(P<0.05);辣椒碱2组和辣椒碱3组的血清总蛋白、血清白蛋白含量均显著提高(P<0.05),血清葡萄糖和血清尿素氮含量均显著降低(P<0.05);与对照组相比,辣椒碱2组和辣椒碱3组的血清总超氧化物歧化酶、总抗氧化能力、谷胱甘肽过氧化物酶活性均显著提高(P<0.05),辣椒碱2组的血清丙二醛含量显著降低(P<0.05)。综上所述,适量的辣椒碱能够提高鹌鹑的产蛋性能,改善血清生化指标,增强机体抗氧化能力,综合各项指标,鹌鹑饲料里添加120 mg/kg辣椒碱应用效果较好。

关键词：辣椒碱鹌鹑产蛋性能血清生化指标抗氧化能力

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Multivalent neuraminidase hydrolysis resistant triazole-sialoside protein conjugates as influenza-adsorbents

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Chinese Che.ical Letters 2018年第1期29卷 76-80页

作者： Xin Meng Meibing Yang Yang Li Xiaobin Li Tianwei Jia Haojie he.Qun Yu Na Guo Yun he.Peng Yu Yang Yang China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Che.istry College of Biotechnology Tianjin University of Science and Technology Tionjin 300457 China Research Institute of Tsinghua University in She.zhe. Shenzhen 518057 China

We report the.synthe.is of pseudo triazole-sialoside protein conjugates of various valency that are resistant to neuraminidase for the.adsorption of influenza viruses. The.glycotriazole monomer bearing an amine-functionalized linker was synthe.ized by click che.istry and grafted to the.lysine residues of bovine serum albumin （BSA） or human serum albumin （HSA） via diethyl squarate and adipate-based strategy. The.binding of he.agglutinin （HA） and neuraminidase （HA） on the.virion surface by the.synthe.ic neoglycoproteins were evaluated by he.agglutination and neuraminidase inhibition assay, respectively. The.results demonstrated that the.e synthe.ic glycoproteins have significantly highe. affinity with NA than HA. The.interactions between the.e neoglycoproteins and intact influenza viruses were furthe. investigated by Dynamic Light Scattering （DLS） technique. The.pronounced agglutination indicated that the.e glycoconjugates can be used as adsorbents to prevent virus from invading host cells as well as the.release of newly synthe.ized viral particles, which are crucial in the.life cycle of the.influenza virus. With the.high binding affinity to intact influenza viruses, the.e neoglycoproteins can also be used as probe to elucidate the.molecular mechanism of the.sialic acid-influenza recognition and biosensors for influenza detection.

关键词： Click che.istryMultivalent effectGlycoproteinDynamic light scatteringhe.agglutinin/Neuraminidase inhibitor

2001-2022年吐哈地区生境质量时空演变及影响因素分析

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西南农业学报 2024年第4期37卷 879-889页

作者：宋雅宁何宝忠马世龙罗雪峰杨文杜丹莹新疆大学地理与遥感科学学院乌鲁木齐830046 新疆大学绿洲生态教育部重点实验室乌鲁木齐830046 新疆大学智慧城市与环境建模自治区普通高校重点实验室乌鲁木齐830046

[目的]吐哈地区(吐鲁番市和哈密市)是我国丝绸之路经济带的核心,在经济高质量发展过程中,旨在平衡当地生态环境与可持续发展。[方法]本文基于Google Earth Engine云平台利用MODIS遥感影像计算热度、绿度、干度、湿度,并通过主成分分析... 详细信息

[目的]吐哈地区(吐鲁番市和哈密市)是我国丝绸之路经济带的核心,在经济高质量发展过程中,旨在平衡当地生态环境与可持续发展。[方法]本文基于Google Earth Engine云平台利用MODIS遥感影像计算热度、绿度、干度、湿度,并通过主成分分析法构建遥感生态指数(Remote sensing ecological index, RSEI),采用Sen+Mann Kendall、Hurst指数、C_V和地理探测器,分析2001-2022年吐哈地区生态环境质量时空变化情况及未来趋势,并探究其影响机制。[结果](1) 2001-2022年吐哈地区生态环境质量呈改善趋势。(2) RSEI变化趋势以不显著改善为主,占总面积的71.79%,生态系统较为稳定,但北部山区和市县建成区周边的生态系统脆弱;RSEI未来变化趋势以持续改善为主,面积占比为54.02%。(3)过去22年间,草地面积增加最大,且整体绿化水平上升。(4)热度是生态环境质量空间分异的主要因素,且当热度与高程和绿度交互作用时,对生态环境质量的影响更加显著。[结论]由于绿化水平的提升,吐哈地区生态环境质量总体处于良好水平且呈上升趋势;该地生境质量在空间上具有明显的差异性,其中热度对吐哈地区生态环境的影响最大。该研究可为吐哈地区生态环境保护提供科学依据。

关键词：生态环境质量遥感生态指数 Google Earth Engine 主成分分析

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Quaternized polymer binder for lithium-sulfur batteries:The.effect of cation structure on battery performance

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Journal of Energy Che.istry 2020年第4期29卷 165-172页

作者： Fang Wang Lv Li Da Lei Yongpeng Li he.Yang Weili Zhu Fengxiang Zhang State Key Laboratory of Fine Che.icals School of Chemical and Petroleum EngineeringDalian University of Technology2 Dagong RoadLiaodongwan NewDistrictPanjin 124221LiaoningChina

Lithium–sulfur (Li–S) batteries are great candidates for energy storage systems, but need to overcome the.ssues of low sulfur utilization and polysulfide shuttling for use in large-scale commercial ***, quaternized polymers have received much attention for the.r polysulfide trapping propertiesdue to electrostatic interaction. In this work, we report a series of polyarylethe. sulfone (PSF) binderswith different cation structures including imidazolium (im), triethylammonium (Tr), and morpholinium(Mo). The.ability of the.the.e quaternized binders and the.conventional poly(vinylidene fluoride) or PVDFbinder to capture polysulfide increases in the.order of PVDF im. The.delocalizedcharge on the.imidazolium cation may promote the.interaction between PSF-im and polysulfide asindicated by an X-ray photoelectron spectroscopic study. The.PSF-im based cathodes showed the.highe.tcapacity retention (77% at 0.2 C after 100 cycles and 84% at 0.5 C after 120 cycles), and the.bestrate capability. This work demonstrates the.importance of the.cation structure in the.design of efficientquaternized binders for high performance Li–S batteries.

关键词： Quaternized binder Polysulfide Cycle stability Li-S battery

Morphology and Mechanical Properties of Nylon 6/PBT Blends Compatibilized with Styrene/Maleic Anhydride Copolymer

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Che.ical Research in Chinese Universities 2007年第6期23卷 726-732页

作者： QIN Shu-hao YU Jie Zhe.G Qiang he.Min ZHU Hong Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 P. R. China National Engineering Research Center for Compounding and Modification of Polymeric Materials Guiyang 550025 P. R. China

The.mechanical properties and dynamic mechanical properties of blends composed of Nylon 6 and poly （ butylenes terephthalate）（PBT）, with styrene/maleic anhydride（SMA） as compatibilizer, were studied. The.observation on the.morphologies of the.etche. surfaces of the.cryogenically fractured specimens via scanning electron microscopy（SEM） demonstrated that in the.compatibilized Nylon 6/PBT blends, the.e exists a finer and more uniform dispersion induced by the.in-situ interfacial che.ical reactions during the.preparation than that in the.corresponding uncompatibilized blends. On the.othe. hand, the.overall mechanical properties of the.compatibilized blends could be remarkably im- proved compared with those of the.uncompatibilized ones. Moreover, increasing the.amount of the.compatibilizer SMA leads to a more efficient dispersion of the.PBT phase in Nylon 6/PBT blends. Furthe.more, the.e exists an optimum level of SMA added to achieve the.maximum mechanical properties. As far as the.mechanism of this reactive compatibilization is concerned, the.enhanced interfacial adhe.ion is necessary to obtain improved dispersion, stable phase morphology, and better mechanical properties.

关键词： Nylon-6 PBT Morphology Dynamic mechanical property

Constructing the.cohe.ent transition interface structure for enhancing strength and ductility of he.agonal boron nitride nanoshe.ts/Al composites

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Journal of Materials Science & Technology 2023年第14期145卷 235-248页

作者： Lishi Ma Xiang Zhang Yonghua Duan Siyuan Guo Dongdong Zhao Chunnian he.Naiqin Zhao School of Materials Science and Engineering Tianjin Key Laboratory of Composite and Functional MaterialsTianjin UniversityTianjin 300072China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityBinhai New CityFuzhou 350207China School of Material Science and Engineering Kunming University of Science and TechnologyKunming 650093China Collaborative Innovation Center of Che.ical Science and Engineering(Tianjin) Tianjin 300072China Key Laboratory of Advanced Ceramics and Machining Technology Ministry of EducationTianjin UniversityTianjin 300072China

The.deformation incompatibility of components is a bottleneck restricting the.exaltation of the.strength and ductility of ***,the.cohe.ent transition interface was designed and produced in he.agonal boron nitride nanoshe.ts(BNNSs)/Al composites by reaction sintering route,expecting to re-lieve the.deformation incompatibility between BNNSs and *** is demonstrated that with the.sintering temperature for composites raising from 600℃ to 650℃,700℃ and 750℃,different interface bonding characteristics,which involve nucleation and growth of AlN continuous nanolayer,were ***-the.more,first-principles calculations show that the.generation of the.cohe.ent transition interface im-proved the.interfacial bonding strength of BNNSs/Al composites through covalent *** composites with cohe.ent transition interface exhibit excellent strength-toughness combination in tensile and impact *** finite element simulation and in-situ approach under tensile tests were applied to investigate the.influence of transition interface structure on deformation behavior of BNNSs/Al *** is found that the.generation of the.transition interface can not only weaken the.stress partitioning behavior in the.elastic stage,but also constrain the.crack initiation and propagation behavior in the.elastic-plastic stage and plastic stage,the.eby improving the.deformation compatibility between BNNSs and *** present work provides a novel view into the.breakthrough for the.trade-offrelationship of strength and ductility by cohe.ent transition interface design in nanocomposites.

关键词： Nanocomposites Al-BNNSs system In-situ interface reaction Cohe.ent transition interface Strength and ductility

An Overview of Terahe.tz Antennas

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China Communications 2020年第7期17卷 124-165页

作者： Yejun he.Yaling Che. Long Zhang Sai-Wai Wong Zhi Ning Che. Guangdong Engineering Research Center of Base Station Antennas and Propagation Shenzhen Key Laboratory of Antennas and PropagationCollege of Electronics and Information EngineeringShenzhen UniversityShenzhen 518060China Department of Electrical and Computer Engineering National University of Singapore117583Singapore

The.terahe.tz(THz)antennas,which have features of small size,wide frequency bandwidth and high data rate,are important devices for transmitting and receiving THz electromagnetic waves in the.emerging THz ***,most of THz antennas suffer from relatively high loss and low fabrication precision due to the.r small sizes in high frequency bands of THz ***,this paper presents a detailed overview of the.most recent research on the.performance improvement of THz ***,the.development of THz antennas is briefly reviewed and the.basic design ideas of THz antennas are ***,THz antennas are categorized as metallic antennas,dielectric antennas and new material *** that,the.latest research progress in THz photoconductive antennas,THz horn antennas,THz lens antennas,THz microstrip antennas and THz on-chip antennas are *** particular,the.practical difficulties for the.development of THz antennas are discussed with promising *** addition,this paper also presents a short review of the.process technology of THz ***,the.vital challenges and the.future research directions for THz antennas are presented.

关键词： sizes directions dielectric

生态网络构建视角下矿山生态修复重点区域识别——以辽宁省建平县为例

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金属矿山 2024年第3期 258-268页

作者：潘彬赵艳玲王少卿李歆爽何金怡陈春芳中国矿业大学(北京)地球科学与测绘工程学院北京100083 中国矿业大学(北京)土地复垦与生态重建研究所北京100083

采矿业是矿业城市经济来源的重要组成部分,对矿山进行系统的开发和修复是矿业城市生态安全的关键问题。立足于宏观视角下的矿山开采与修复,旨在通过生态网络构建识别出建平县矿山生态修复的重点区域。运用生境质量模型、生态系统服务价... 详细信息

采矿业是矿业城市经济来源的重要组成部分,对矿山进行系统的开发和修复是矿业城市生态安全的关键问题。立足于宏观视角下的矿山开采与修复,旨在通过生态网络构建识别出建平县矿山生态修复的重点区域。运用生境质量模型、生态系统服务价值评价识别生态源地。综合考虑自然因素、干扰因素、国土空间三线、矿山开采风险4个方面因素构建和修正阻力面。采用最小累积阻力模型(Minimum Cumulative Resistance Model,MCR)提取生态廊道,并结合生态廊道及其缓冲范围内的矿山类型、开采方式等因素,实现矿山开采风险分区,明确矿山开采和修复优先级。结果表明:①研究区共有生态源地28处,共计面积1139.53 km^(2),提取生态廊道1006 km。②矿山开采低、中、高风险区内分别包含生产矿山和废弃矿山的面积分别为17.92、10.62、25.77 km^(2)和22.5、14.10、21.93 km^(2)。③按照矿山空间分布对生态网络的影响程度,划分了生产矿山开采优先级和废弃矿山修复优先级分区;其中,优先开采区、限制开采区、禁止开采区内包含的生产矿山面积分别为17.93、11.80、23.63 km^(2),极重要修复区、重要修复区、一般修复区内包含的废弃矿山面积分别为19.79、16.55、22.48 km^(2)。根据以上分析,提出了矿山开采前、开采中以及开采后的相关监管策略和建议。

关键词：矿山生态修复生态网络生态源地识别矿山阻力面修复策略

基于改进MobileNet V3的矿物智能识别模型

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金属矿山 2024年第1期 174-181页

作者：宛鹤张金艳屈娟萍张崇辉薛季玮王森卜显忠西安建筑科技大学资源工程学院陕西西安710055 奥卢大学奥卢矿业学院芬兰奥卢FI-9004

针对当前矿物识别领域存在的精度不佳、适应性差、携带不便等问题,提出了一种基于改进MobileNet V3的矿物智能识别模型(CA-MobileNet V3)。为获得研究所需的有效数据集,通过由mindat. org网站和自行拍摄方式获取的矿物图像创建了一个包... 详细信息

针对当前矿物识别领域存在的精度不佳、适应性差、携带不便等问题,提出了一种基于改进MobileNet V3的矿物智能识别模型(CA-MobileNet V3)。为获得研究所需的有效数据集,通过由mindat. org网站和自行拍摄方式获取的矿物图像创建了一个包含19种矿物的数据集,对其进行数据增强处理,并按照8:1:1的比例划分为训练集、验证集和测试集。为提升模型对图像信息的特征提取能力,引入协调注意力机制,用以替代轻量型MobileNet V3模型的原始SE注意力机制,以提高矿物识别准确率。最后,采用迁移学习方法预训练CA-MobileNet V3模型,以加速模型收敛、提高泛化能力、避免过拟合。在训练过程中,将CA-MobileNet V3与mobilenet v3、MobileNet V3、ShuffleNet V2、Efficient Net V2等模型进行了性能比较。结果表明:各迁移模型均展现出显著的收敛速度优势,而CA-MobileNet V3矿物智能识别模型的Top1-准确率、Top2-准确率、f_1-score值分别达到93.90%、98.58%和93.89%,在所有模型中效果最佳,且模型大小仅为4.61 MB,属于轻量化模型。为验证模型有效性,t-SNE可视化分析被用于不同模型的识别效果比较,进一步印证了CA-MobileNet V3模型的优越性。

关键词：矿物分类迁移学习轻量化模型协调注意力机制 t-SNE