检索结果-南通市图书馆

Journal of Materials Science & Technology 1998年第6期14卷 516-522页

作者： Jiang, zh Lian, JS Yang, DZ dong, SL Jilin Univ Technol Dept Mat Sci & Engn Changchun 130025 Peoples R China Harbin Inst Technol Sch Mat Sci & Engn Harbin 150001 Peoples R China

A new modification for the shear lag model is given and the expressions for the stiffness and yield Strength of short fiber metal matri×composite are derived. These expressions are then compared with our experimental data in a SiCw/Al-Li T6 composite and the published experimental data on different SiCw/Al T6 composites and also compared with the previous shear lag models and the other theoretical models.

关键词： SiC A New Modification to Shear Lag Model as Applied to Stiffness and Yield Strength of Short Fiber Reinforced Metal Matrix Composites

Molecular cloning of differentially expressed novel rice genes induced by Magnaporthe grisea

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1997年第20期42卷 1748-1750页

作者： He, zh dong, HT Cheng, SJ Wu, YL dong, JX Li, DB zhejiang Agr Univ Inst Biotechnol Hangzhou 310029 Peoples R China

WE have applied the differential display (D. D.) of mRNA method to detect and clone tran-scripts that were differentially expressed between rice NILs (Near-isogenic lines) H7R (resis-tant) and H7S (susceptible) which were induced by Magnaporthe grisea. The cDNA gene-tags obtained from D. D. analysis were reamplified by PCR and screened by Southern

关键词： rice Magnaporthe grisea molecular cloning.

Knockout of miR396 genes increases seed size and yield in soybean

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Plant Biology 2024年第6期66卷 1148-1157页

作者： Hongtao Xie Fei Su Qingfeng Niu Leping Geng Xuesong Cao Minglei Song Jinsong dong Zai zheng Rui Guo Yang zhang Yuanwei Deng zhanbo Ji Kang Pang Jian‐Kang zhu Jianhua zhu School of Life Sciences Anhui Agricultural UniversityHefei 230036China Research Center for Biological Breeding Technology Research Institute of Frontier ScienceAnhui Agricultural UniversityHefei 230036China Bellagen Biotechnology Co.Ltd Jinan 250000China Institute of Crop Sciences/National Nanfan Research Institute Chinese Academy of Agricultural SciencesKey Laboratory of Gene Editing Technologies(Hainan)Ministry of Agriculture and Rural AffairsSanya 572025China Southern University of Science and TechnologyShenzhen 518055China Hainan Yazhou Bay Seed Laboratory Sanya 572024China

Yield improvement has long been an important task for soybean breeding in the world in order to meet the increasing demand for food and animal *** R396 genes have been shown to negatively regulate grain size in rice,but whether mi R396 family members may function in a similar manner in soybean is ***,we generated eight soybean mutants harboring different combinations of homozygous mutations in the six soybean mi R396genes through genome editing with clustered regularly interspaced palindromic repeats(CRISPR)/CRISPR-associated nuclease(Cas)12SF01 in the elite soybean cultivar zhonghuang 302(zh302).Four triple mutants(mir396aci,mir396acd,mir396adf,and mir396cdf),two quadruple mutants(mir396-abcd and mir396acfi),and two quintuple mutants(mir396abcdf and mir396bcdfi)were *** found that plants of all the mir396 mutants produced larger seeds compared to zh302 *** tests showed that mir396adf and mir396cdf plants have significantly increased yield in growth zones with relatively high latitude which are suited for zh302 and moderately increased yield in lower *** contrast,mir396abcdf and mir396bcdfiplants have increased plant height and decreased yield in growth zones with relatively high latitude due to lodging issues,but they are suited for low latitude growth zones with increased yield without lodging *** together,our study demonstrated that loss-of-function of mi R396 genes leads to significantly enlarged seed size and increased yield in soybean,providing valuable germplasms for breeding high-yield soybean.

关键词： Cas12SF01 CRISPR/Cas miR396 seed size soybean yield

Diversity and connectedness of brine shrimp viruses in global hypersaline ecosystems

在线全文

学校读者我要写书评

暂无评论

Science China(Life Sciences) 2024年第1期67卷 188-203页

作者： Xuan dong Cixiu Li Yiting Wang Tao Hu Fan zhang Fanzeng Meng Meirong Gao Xuekai Han Guohao Wang Jiahao Qin Hans Nauwynck Edward CHolmes Patrick Sorgeloos Liying Sui Jie Huang Weifeng Shi State Key Laboratory of Mariculture Biobreeding and Sustainable Goods Yellow Sea Fisheries Research InstituteChinese Academy of Fishery SciencesLaboratory for Marine Fisheries Science and Food Production ProcessesLaoshan LaboratoryKey Laboratory of Maricultural Organism Disease ControlMinistry of Agriculture and Rural AffairsQingdao Key Laboratory of Mariculture Epidemiology and BiosecurityQingdao 266071China Shandong Provincial Hospital Affiliated to Shandong First Medical University Jinan 250021China Key Laboratory of Emerging Infectious Diseases in Universities of Shandong Shandong First Medical University&Shandong Academy of Medical SciencesTaian 271000China Dalian ocean University Dalian 116023China Asian Regional Artemia Reference Center Tianjin University of Science&TechnologyTianjin 300457China Ghent University Ghent 9000Belgium Sydney Institute for Infectious Diseases School of Medical SciencesThe University of SydneySydney 2006Australia Network of Aquaculture Centres in Asia-Pacific Bangkok 10900Thailand School of Public Health Shandong First Medical University&Shandong Academy of Medical SciencesJinan 250117China

Brine shrimp(Artemia)has existed on Earth for 400 million years and has major ecological importance in hypersaline *** a crucial live food in aquaculture,brine shrimp cysts have become one of the most important aquatic products traded ***,our understanding of the biodiversity,prevalence and global connectedness of viruses in brine shrimp is still very limited.A total of 143 batches of brine shrimp(belonging to seven species)cysts were collected from six continents including 21 countries and more than 100 geographic locations worldwide during 1977–*** total,55 novel RNA viruses were identified,which could be assigned to 18 different viral families and related *** viruses were dsRNA viruses,16 were+ssRNA viruses,and 28 were−ssRNA *** analyses of the RNA-directed RNA polymerase(RdRp)showed that brine shrimp viruses were often grouped with viruses isolated from other invertebrates and ***,most brine shrimp viruses were related to those from different hosts that might feed on brine shrimp or share the same ecological niche.A notable case was the novel brine shrimp noda-like virus 3,which shared 79.25%(RdRp)and 63.88%(capsid proteins)amino acid identity with covert mortality nodavirus(CMNV)that may cause losses in *** addition,both virome composition and phylogenetic analyses revealed global connectedness in certain brine shrimp viruses,particularly among Asia and Northern *** highlights the incredible species diversity of viruses in these ancient species and provides essential data for the prevalence of RNA viruses in the global aquaculture *** broadly,these findings provide novel insights into the previously unrecognized RNA virosphere in hypersaline ecosystems worldwide and demonstrate that human activity might have driven the global connectedness of brine shrimp viruses.

关键词： brine shrimp Artemia virus diversity novel virus discovery global connectedness hypersaline ecosystem

超深软土区真空预压对复合地基的影响及其防治

在线全文

学校读者我要写书评

暂无评论

地下空间与工程学报 2024年第2期20卷 690-700页

作者：陈仕文李栋汪旭珠海市规划设计研究院广东珠海519000 广东省滨海地区防灾减灾工程技术研究中心广东珠海519000

在超深软土区,地块进行真空预压处理时可能会对近邻既有复合地基产生不利影响,针对性分析这种影响并寻求实用的防治方法具有重要意义。本文以某深厚软土区实际工程为原型,建立了平面应变模型,还原路侧真空预压过程,探索了复合地基受到... 详细信息

在超深软土区,地块进行真空预压处理时可能会对近邻既有复合地基产生不利影响,针对性分析这种影响并寻求实用的防治方法具有重要意义。本文以某深厚软土区实际工程为原型,建立了平面应变模型,还原路侧真空预压过程,探索了复合地基受到的影响,并分析了4种对策的效果。结果表明:(1)真空预压产生的水平位移在场地边缘最大,场地边缘与复合地基之间的过渡区变形剧烈,承受了两个区域之间主要的水平和沉降变形差;(2)对于低渗透性的软土,真空预压产生的沉降主要集中在地表以下15 m范围内,深层的排水板对沉降贡献率低;(3)负压经历了从排水板向土体,从上至下的传递过程,排水板与土体之间的孔压差随着排水板深度增大而减小;(4)群桩中边桩侧向位移最大,弯矩是桩破坏的控制指标,群桩可能从边桩破坏,然后向地基中心蔓延;(5)增大场地处理边缘与路基距离、复合地基施工前先对路基进行真空预压处理、缩短地路基边缘排水板的长度以及在过渡区靠近路基一侧增加钢混支护,均是控制复合地基变形和受力的有效措施。

关键词：复合地基超深软土真空预压悬浮桩防治措施

在线全文

学校读者我要写书评

暂无评论

加筋路堤下刚性桩复合地基变形特性分析

公路交通科技 2024年第8期41卷 106-113页

作者：陈仕文唐昌意李栋珠海市规划设计研究院广东珠海519000

刚性桩复合地基在珠海地区软土区道路工程中应用时常出现沉降和不均匀沉降较大的问题,进而引发沿路管线破坏和路面波浪起伏。为了解决深厚软土区刚性桩复合地基存在的沉降和差异沉降过大问题,优化复合地基设计,为防治道路病害提供参考,... 详细信息

刚性桩复合地基在珠海地区软土区道路工程中应用时常出现沉降和不均匀沉降较大的问题,进而引发沿路管线破坏和路面波浪起伏。为了解决深厚软土区刚性桩复合地基存在的沉降和差异沉降过大问题,优化复合地基设计,为防治道路病害提供参考,本研究通过数值计算方法建立了平面应变模型。将三维桩体和桩帽进行二维等效,并考虑了路堤填注和土体固结的过程,分析了基准工况和不同参数条件下加筋路堤下刚性桩复合地基变形特性。结果表明:刚性桩复合地基的变形可分为变形协调区、统一沉降区和压缩变形区,其中变形协调区主要影响差异沉降,压缩变形区主要影响总沉降,统一沉降区则因自身压缩变形小,随复合地基整体下沉,而起到减小总沉降的作用;在桩两端约束强于桩中部约束的情况下,边桩可能首先在中部发生弯曲破坏;刚性桩复合地基施工过程中出现的路堤外隆起现象会在工后逐步消失并在路堤带动下发生沉降;参数分析结果表明,持力层的强度、桩端嵌入持力层深度对路堤沉降影响最大,而桩间距、桩帽尺寸对差异沉降影响最大,场坪土的强度及砂黏性、褥垫层厚度、地下水深度对路堤沉降均有一定影响,但影响较为有限。因此,对于深厚软土区域,根据软土厚度确定桩长并合理增大桩间距和桩帽尺寸,可以控制路堤沉降并节省工程造价。

关键词：道路工程变形特性数值计算刚性桩复合地基软基处理

Sex-and age-specific associations between abdominal fat and non-alcoholic fatty liver disease:a prospective cohort study

在线全文

学校读者我要写书评

暂无评论

Journal of Molecular Cell Biology 2023年第11期15卷 33-42页

作者： Hongli Chen Yuexing Liu Dan Liu Yebei Liang zhĳun zhu Keqing dong Huating Li Yuqian Bao Jiarui Wu Xuhong Hou Weiping Jia Department of Endocrinology and Metabolism Shanghai Sixth People’s Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghai Diabetes InstituteShanghai Key Laboratory of Diabetes MellitusShanghai Key Clinical Center for Metabolic DiseaseShanghai 200233China General Practitioner Teams in Community Health Service Center of Nicheng Pudong New Area DistrictShanghai 201306China CAS Key Laboratory of Systems Biology Shanghai Institute of Biochemistry and Cell BiologyCenter for Excellence in Molecular Cell ScienceChinese Academy of SciencesShanghai 200031China

obesity is closely related to non-alcoholic fatty liver disease(NAFLD).Although sex differences in body fat distribution have been well demonstrated,little is known about the sex-specific associations between adipose tissue and the development of *** community-based cohort data,we evaluated the associations between magnetic resonance imaging quantified areas of abdominal adipose tissue,including visceral adipose tissue(VAT)and subcutaneous adipose tissue(SAT),and incident NAFLD in 2830 participants(1205 males and 1625 females)aged 55–70 *** a 4.6-year median follow-up,the cumulative incidence rates of NAFLD increased with areas of VAT and SAT both in males and in *** analyses showed that the abovementioned positive associations were stronger in males than in females,especially in participants under 60 years *** contrast,these sex differences disappeared in those over 60 years ***,the risk of developing NAFLD increased non-linearly with increasing fat area in a sex-specific ***,sex-specific potential mediators,such as insulin resistance,lipid metabolism,inflammation,and adipokines,may exist in the associations between adipose tissue and *** study showed that the associations between abdominal fat and the risk of NAFLD were stratified by sex and age,highlighting the potential need for sex-and age-specific management of NAFLD.

关键词： visceral adipose tissue subcutaneous adipose tissue sex difference NAFLD incidence prospective study

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

北魏《元忠墓志》探讨

云冈研究

云冈研究 2024年第1期4卷 71-75页

作者：李晓东大同市博物馆山西大同037009

元忠为北魏重臣,累任侍中,征西大将军,尚书仆射等,地位显赫。《元忠墓志》面世以来,为我们全面梳理他的身世及背后的故事提供了实物资料。元忠夫妇合藏于平城,隐密的墓志背后皆是当时社会的真实写照,旧京勋贵与新都贵胄展开一场时代变... 详细信息

元忠为北魏重臣,累任侍中,征西大将军,尚书仆射等,地位显赫。《元忠墓志》面世以来,为我们全面梳理他的身世及背后的故事提供了实物资料。元忠夫妇合藏于平城,隐密的墓志背后皆是当时社会的真实写照,旧京勋贵与新都贵胄展开一场时代变革的博弈,既在改革的步伐下不断前进,又在利益或者传统的观念下流连忘返,谱写出错综复杂的社会改革发展的新篇章。

关键词：《元忠墓志》平城洛阳

Zn-Al-Zr LDH/氧化石墨烯对水中草甘膦的去除研究

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

中国陶瓷 2024年第7期60卷 28-35页

作者：任建辉熊昆李冬梅西南科技大学环境友好能源材料国家重点实验室绵阳621010 西南科技大学材料与化学学院绵阳621010 南通环安智能科技有限公司南通226000

采用氯化锌、六水合氯化铝、八水合氧氯化锆和氧化石墨烯为原料,氢氧化钠和一水合碳酸钠为碱溶液,通过共沉淀法合成Zn-Al-Zr LDH/Go纳米复合材料(LDH/Go)。XRD、SEM、BET和UV-Vis分光光度计,分别用于表征Zn-Al-Zr LDH/Go复合材料的物相... 详细信息

采用氯化锌、六水合氯化铝、八水合氧氯化锆和氧化石墨烯为原料,氢氧化钠和一水合碳酸钠为碱溶液,通过共沉淀法合成Zn-Al-Zr LDH/Go纳米复合材料(LDH/Go)。XRD、SEM、BET和UV-Vis分光光度计,分别用于表征Zn-Al-Zr LDH/Go复合材料的物相组成、微观形貌、孔隙结构和吸附过程。结果表明:Go的掺入可以改善LDH的形貌结构,当温度在303 K,pH=7,投料量为0.5g/L,LDH/Go对草甘膦的吸附容量可达10.707 mg/g;其吸附过程符合准二级动力学和Freundlich等温吸附模型,LDH/Go对草甘膦的去除机理为静电吸引和表面络合;其草甘膦吸附性能优于当前商业磷吸附产品Phoslock。因此,Zn-Al-Zr LDH/Go可作为一种有前景的草甘膦去除剂。

关键词：层状双金属氢氧化物石墨烯去除草甘膦

服务贸易开放下的制造业服务化与全要素生产率

在线全文

学校读者我要写书评

暂无评论

技术经济与管理研究 2024年第2期 137-143页

作者：王宏森方栓喜张东生东北大学工商管理学院辽宁沈阳110167 中国(海南)改革发展研究院海南海口570311 烟台大学经济管理学院山东烟台264005

服务贸易开放可以促进服务要素跨境流通,进而推动制造业与服务要素的融合。使用WIoD面板数据和SFA模型,研究服务贸易开放和制造业服务化对制造业全要素生产率(TFP)的影响。结果显示,制造业的服务化转型和服务贸易开放都对TFP有正向影响... 详细信息

服务贸易开放可以促进服务要素跨境流通,进而推动制造业与服务要素的融合。使用WIoD面板数据和SFA模型,研究服务贸易开放和制造业服务化对制造业全要素生产率(TFP)的影响。结果显示,制造业的服务化转型和服务贸易开放都对TFP有正向影响,并且二者的相互作用可以进一步提高TFP水平。异质性分析表明,这种影响对低技术制造业TFP的促进作用最大;制造业投入生产性服务及其与服务贸易开放的交互效应对TFP的正向影响大于投入生活性服务和公共服务。应积极推动制造业的服务化转型和服务贸易开放,以促进制造业的高质量发展。

关键词：服务贸易开放制造业服务化全要素生产率高质量发展