检索结果-南通市图书馆

维普期刊数据库博看期刊

荧光光谱法考察七、八元瓜环与甲基吲哚的相互作用

在线全文

学校读者我要写书评

暂无评论

光谱学与光谱分析 2011年第6期31卷 1585-1590页

作者：侯华丽薛赛凤牟兰陶朱贵州省大环化学及超分子化学重点实验室贵州大学应用化学研究所贵州贵阳550025

利用荧光光谱法考察了七、八元瓜环（Cucurbit[n=7,8]urils,Q[7],Q[8]）与客体2-甲基吲哚（2-methylindol,Me）和3-甲基吲哚（3-methylindol,Sk）的相互作用;同时研究了体系pH以及温度对Q[7]和Q[8]与客体相互作用的影响;并计算了相应的... 详细信息

利用荧光光谱法考察了七、八元瓜环（Cucurbit[n=7,8]urils,Q[7],Q[8]）与客体2-甲基吲哚（2-methylindol,Me）和3-甲基吲哚（3-methylindol,Sk）的相互作用;同时研究了体系pH以及温度对Q[7]和Q[8]与客体相互作用的影响;并计算了相应的稳定常数及热力学参数等。实验结果表明：除Q[8]与Sk作用比为1：2外,其余主客体的作用比均为1：1;在pH值为1~11,温度为298~313 K的范围内上述体系的作用比不变;在pH 1和室温条件下,作用体系的稳定常数较大;通过热力学参数的测定可知上述主客体的相互作用均是自发进行。

关键词：瓜环甲基吲哚荧光光谱法稳定常数热力学稳定性

在线全文

学校读者我要写书评

暂无评论

EJB和CORBA互操作的实现

计算机工程与应用 2003年第32期39卷 148-150页

作者：赵银花侯迪齐勇西安交通大学西安710049

文章简要介绍了EJB和CORBA这两种分布式应用平台,分析了这两种平台上的应用进行互操作的可能性。提出了一种在J2EE应用服务器中通过添加CORBA服务实现EJB和CORBA互操作的方法。

关键词： J2EE EJB对象 CORBA对象互操作

Strategies to advance thermoelectric performance of PbSe and PbS materials

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2024年第9期43卷 4099-4114页

作者： Zheng-Hao hou xin Qian Qiu-Juan Cui Shu-Fang Wang Li-Dong Zhao Shijiazhuang Key Laboratory of Low Carbon Energy Materials College of Chemical EngineeringShijiazhuang UniversityShijiazhuang 050035China Hebei Key Lab of Optic-Electronic Information and Materials College of Physics Science and TechnologyHebei UniversityBaoding 071002China School of Materials Science and Engineering Beihang UniversityBeijing 100191China

Thermoelectric materials possess the unique capability to convert thermal energy into electric energy and vice versa,making them promising for waste heat recovery and efficient cooling ***,extensively investigated thermoelectric materials such as Bi2Te3,PbTe and GeTe exhibit superior thermoelectric properties at room temperature and medium temperature ***,the broad application of these thermoelectric materials has been impeded by the high cost and restricted accessibility of Te and Ge in the earth's *** the past few years,researchers have shown increasing interest in PbSe-and PbS-based materials,primarily attributed to their abundant elemental supply and relatively low *** assessment of research progress and a comprehensive overview of optimization strategies in time can significantly contribute to further improving the thermoelectric *** strategies include optimizing carrier concentration(aliovalent doping,dynamic doping and defect state),enhancing density-of-state effective mass(band convergence,band flattening and energy filtering effect),optimizing carrier mobility(band sharpening and band alignment)and reducing lattice thermal conductivity(all-scale hierarchical defect structures designing).This systematic summary and analysis provide novel insights and perspectives for the development of thermoelectric materials.

关键词： PbSe and PbS thermoelectric materials Carrier concentration Density-of-state effective mass Carrier mobility Lattice thermal conductivity

在线全文

学校读者我要写书评

暂无评论

从民族关系视角看区域经济发展差距

贵州民族研究 2007年第1期27卷 57-63页

作者：侯万锋西北师范大学政法学院甘肃兰州730070

现阶段,我国业已拉大的区域经济发展差距,实际上表现为西部民族地区经济发展的滞后。这种滞后不仅仅是西部民族地区发展滞后的经济问题,而且是直接影响着我国的社会政治稳定,直接影响着我国总体民族关系的重大政治问题。从西部的民族性... 详细信息

现阶段,我国业已拉大的区域经济发展差距,实际上表现为西部民族地区经济发展的滞后。这种滞后不仅仅是西部民族地区发展滞后的经济问题,而且是直接影响着我国的社会政治稳定,直接影响着我国总体民族关系的重大政治问题。从西部的民族性和落后特征入手,分析这种滞后对我国民族关系的负面影响,提出在加快区域经济协调发展中保持和谐的民族关系,无疑具有重要的理论意义和实践价值。

关键词：区域经济发展差距西部地区经济发展滞后民族关系视角

Characterization of spoilage bacterial communities in chilled duck meat treated by kojic acid

在线全文

学校读者我要写书评

暂无评论

Food Science and Human Wellness 2021年第1期10卷 72-77页

作者： Wenfu hou Qiqi Yue Wen Liu Ji Wu Yang Yi Hongxun Wang College of Food Science and Engineering Wuhan Polytechnic UniversityWuhanHubei430023China School of Biological and Pharmaceutical Engineering Wuhan Polytechnic UniversityWuhanHubei430023China

Chilled duck meat is a popularly consumed meat in China but easily perishes at room/low temperature. Kojic acid is usually used as an antimicrobial. This study investigated the sensory scores, total bacteria number, and total volatile base nitrogen (TVB-N) value of chilled duck meat under kojic acid treatment during storage. The results presented that kojic acid suppressed the growth of spoilage bacteria and prolonged the shelf-life of chilled duck meat by at least two days. In further investigation, the bacterial community composition was explored through high-throughput sequencing. Pseudomonas spp. were the predominant spoilage bacteria after 6-day storage and were significantly suppressed by kojic acid. Besides, Brochothrix showed drug resistance and became the dominant bacteria in the kojic acid treated sample after 6-day storage. In conclusion, kojic acid maintained the sensorial, chemical, and microbial quality of duck meat stored at low temperatures. Meanwhile, kojic acid enriched the bacteria composition and showed strong antimicrobial activity against Pseudomonas spp.

关键词： Kojic acid Duck meat Spoilage High-throughput sequencing

依托研究项目培养植物分类学人才的研究与实践

在线全文

学校读者我要写书评

暂无评论

教育教学论坛 2025年第1期 125-128页

作者：刘柏玲余一帆侯元同曲阜师范大学生命科学学院山东曲阜273165

植物分类学是植物学其他学科的基础,它以植物的外部形态与内部解剖学为基础,并与孢粉形态和古生物学相结合,对植物进行鉴定与分类,探讨植物间的系统发育关系。21世纪是生物科学的世纪,植物分类学在生物科学领域具有重要的基础性地位,在... 详细信息

植物分类学是植物学其他学科的基础,它以植物的外部形态与内部解剖学为基础,并与孢粉形态和古生物学相结合,对植物进行鉴定与分类,探讨植物间的系统发育关系。21世纪是生物科学的世纪,植物分类学在生物科学领域具有重要的基础性地位,在植物资源利用与保护等方面具有重要意义,而分类学人才在植物分类学发展过程中起了重要的推动作用。如何培养植物分类学人才是值得探讨的科学问题。依托科学研究项目进行分类学人才培养,从国内分类学人才培养现状、培养分类学人才的重要性、培养路径分析以及依托植物研究项目培养分类学人才取得的成效等方面展开论述,最后提出改进建议,以期为分类学人才培养提供参考。

关键词：分类学人才人才培养模式研究项目

Discovery of the radio-protecting effect of Ecliptae Herba,its constituents and targeting p53-mediated apoptosis in vitro and in vivo

在线全文

学校读者我要写书评

暂无评论

Acta Pharmaceutica Sinica B 2023年第3期13卷 1216-1230页

作者： Jiang Wu Wenfeng Gou Zhiyun Wang Huajie Chang Deguan Li Wenbin hou Changxiao Liu Department of Pharmaceutical Engineering School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China Institute of Radiation Medicine Chinese Academy of Medical SciencesTianjin 300192China School of Chinese Materia Medica Tianjin University of Traditional Chinese MedicineTianjin 301617China Research Center for New Drug Evaluation the State Laboratory of Drug Delivery Technology and PharmacokineticsTianjin Institute of Pharmaceutical ResearchTianjin 300193China

Radiation protection drugs are often accompanied by toxicity,even amifostine,which has been the dominant radio-protecting drug for nearly 30 ***,there is no therapeutic drug for radiation-induced intestinal injury(RⅢ).This paper intends to find a safe and effective radioprotecting ingredient from natural *** radio-protecting effect of Ecliptae Herba(EHE) was discovered preliminarily by antioxidant experiments and the mouse survival rate after137Cs *** components and blood substances in vivo were identified through *** correlation network of “natural components in EHE-constituents migrating to blood-targets-pathways” was established to predict the active components and *** binding force between potential active components and targets was studied by molecular docking,and the mechanism was further analyzed by Western blotting,cellular thermal shift assay(CETSA),and Ch ***,the expression levels of Lgr5,Axin2,Ki67,lysozyme,caspase-3,caspase-8,8-OHd G,and p53 in the small intestine of mice were *** was found for the first time that EHE is active in radiation protection and that luteolin is the material basis of this *** is a promising candidate for RⅢ.Luteolin can inhibit the p53 signaling pathway and regulate the BAX/BCL2 ratio in the process of *** could also regulate the expression of multitarget proteins related to the same cell cycle.

关键词： p53 Apoptosis Luteolin Eclipta prostrata L. Radio-protecting Radiation-induced intestinal injury Radiation protection

Smart logistics transformation collaboration between manufacturers and logistics service providers:A supply chain contracting perspective

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Management Science and Engineering 2021年第1期6卷 25-52页

作者： Weihua Liu Jiahe hou xiaoyu Yan Ou Tang College of Management and Economics Tianjin UniversityNo.92Weijin RoadNankai DistrictTianjin300072China Department of Management and Engineering Linköoping UniversityLinköopingSE-58183Sweden

Intelligent transformation of manufacturers requires smart logistics transformation collaboration,which improves *** this study,we construct a Stackelberg game model based on the mutual influence and restriction in the relationship between a manufacturer and a logistics service provider(LSP)undergoing smart logistics *** investigate whether cost-sharing(CS)or revenue-sharing(RS)contracts can coordinate the supply chain and suggest a hybrid CSeRS contract to improve *** find that,compared with decentralized options,CS and RS contracts achieve a higher level of smart logistics *** the coordination and effectiveness of CS contracts are superior to those of RS contracts,neither can fully coordinate the supply *** proposed hybrid CSeRS contract allows the manufacturer to share the LSP’s costs before the transformation and its partial revenue after transformation,so that the LSP can reduce its service charge,thereby achieving full supply chain coordination.

关键词： Smart logistics transformation Collaborative relationship Cost-sharing contract Revenue-sharing contract Hybrid contract

Halide perovskite-based heterostructures for photocatalytic CO_(2)conversion

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2024年第11期43卷 5453-5472页

作者： Yue-Mei Li Zhuang-Zhuang hou xiao-Dong Wan Jia Liu Jia-Tao Zhang School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China Beijing Institute of Radio Measurement Beijing 100854China School of Chemistry and Chemical Engineering Beijing Institute of TechnologyBeijing 100081China

Photocatalytic conversion of solar light into chemical fuels represents an appealing pathway by which a sustainable energy future might be ***,great scientific challenges need to be addressed for developing this technology,such as finding a way to acquire highly efficient semiconductor photocatalytic ***,halide perovskites have emerged as a novel class of semiconductors that display several exceptional advantages,including a large absorption coefficient,high carrier mobility,as well as customizable tunability of band gap,composition,structures,and *** development of photocatalysts solely based on pure halide perovskites encounters significant hurdles due to their intrinsically low stability and activity.A promising strategy to overcome this problem involves the construction of perovskite-based *** integration with other components can enhance light absorption capacity,promote the separation of photogenerated carriers,and augment the number of surface reactive *** this review,we briefly summarize recent advances in the construction of perovskite-based photocatalytic heterostructures,where the perovskites serve either as the matrix or as a decoration ***,the research accomplishments in employing these heterostructures for photocatalytic CO_(2)reduction are ***,the major obstacles and the great potential for future design of perovskite-based heterostructures toward the creation of competitive CO_(2)conversion photocatalysts are proposed.

关键词： Halide perovskite Heterostructures Photocatalysis CO_(2)reduction