检索结果-南通市图书馆

Dissecting the genetic basis of maize deep-sowing tolerance by combining association mapping and gene expression analysis

引用

Journal of Integrative Agriculture 2022年第5期21卷 1266-1277页

作者： YANG Yue MA Yu-ting LIU Yang-yang Demar LYLE LI Dong-dong WANG Ping-xi XU jia-liang ZHEN Si-han LU jia-wen PENG Yun-ling CUI Yu FU jun-jie DU Wan-li ZHANG Hong-wei WANG jian-hua Agronomy College Shenyang Agricultural UniversityShenyang 110161P.R.China National Key Facility for Crop Gene Resources and Genetic Improvement/Institute of Crop Sciences Chinese Academy of Agricultural SciencesBeijing 100081P.R.China Center for Seed Science and Technology College of Agronomy and BiotechnologyChina Agricultural UniversityBeijing 100193P.R.China Gansu Provincial Key Laboratory for Aridland Crop Science/Agronomy College Gansu Agricultural UniversityLanzhou 730070P.R.China

Deep-sowing is an important method for avoiding drought stress in crop species,including *** candidate genes is the groundwork for investigating the molecular mechanism underlying maize deep-sowing *** study evaluated four traits(mesocotyl length at 10 and 20 cm planting depths and seedling emergence rate on days 6 and 12)related to deep-sowing tolerance using a large maize population containing 386 inbred lines genotyped with 0.5 million high-quality single nucleotide polymorphisms(SNPs).The genomewide association study detected that 273 SNPs were in linkage disequilibrium(LD)with the genetic basis of maize deep-sowing *** RNA-sequencing analysis identified 1944 and 2098 differentially expressed genes(DEGs)in two comparisons,which shared 281 *** comparing the genomic locations of the 273 SNPs with those of the 281 DEGs,we identified seven candidate genes,of which GRMZM2G119769 encoded a sucrose non-fermenting 1 kinase interactor-like ***2G119769 was selected as the candidate gene because its homologs in other plants were related to organ length,auxin,or light *** gene association mapping revealed that natural variations in GRMZM2G119769 were related to phenotypic variations in maize mesocotyl *** expression of GRMZM2G119769 was higher in deep-sowing tolerant inbred *** results suggest that GRMZM2G119769 is the most likely candidate *** study provides information on the deep-sowing tolerance of maize germplasms and identifies candidate genes,which would be useful for further research on maize deep-sowing tolerance.

关键词： maize mesocotyl length association mapping differentially expressed gene SNF1 kinase interactor-like protein

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Chiral Ligands from Abrine.4. Heterocycle-Containing 1,2,3,4-Tetrahydro-β-Carboline Methyl Ester Used for Catalysis of Enantioselective Addition of Diethylzinc to Benzaldehyde

引用

Chinese Chemical Letters 1998年第6期9卷 527-528页

作者： Bi Tao ZHAO Hua Jie zhu Xing HONG jun ZHOU Xiao jiang HAO(KunAnng Institute of Botany, Chinese Academy of Sciences, Heilongtan, Kunming 650204) Chinese Acad Sci Kunming Inst Bot Kunming 650204 Peoples R China

Four 1, 2,3,4-tetrahydro - β - c arboline amino acid esters with a heterocycle at the C- 1position were used as chiral ligands in the enantioselective addition reactions. The differentpositions of the heteroatoms gav... 详细信息

关键词： Enantioselective addition diethylzinc 1,2,3,4-tetrahydro-β-carboline ester

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

中小型原水河渠污染事故危害度应急评价模型

引用

水科学进展 2010年第3期21卷 405-412页

作者：朱明李永李嘉四川大学水力学与山区河流开发保护国家重点实验室四川成都610065

为了对中小型原水河渠污染事故危害影响程度进行综合评价,利用污染事故案例样本资料,在提出原水污染事故危害度概念基础上,归纳影响中小型原水河渠污染事故危害度的直接与间接影响因素,应用粗糙集理论与方法,对间接影响因素进行重要性... 详细信息

为了对中小型原水河渠污染事故危害影响程度进行综合评价,利用污染事故案例样本资料,在提出原水污染事故危害度概念基础上,归纳影响中小型原水河渠污染事故危害度的直接与间接影响因素,应用粗糙集理论与方法,对间接影响因素进行重要性分析、冗余约简及重要度权重计算,综合直接与间接影响因素的作用,构建中小型原水河渠污染事故的应急评价模型。以成都市原水河渠为例,设计模拟污染事故情景,对所构建模型进行分析,结果表明,模型能够反映中小型原水河渠污染事故的危害影响程度。所构建模型适用于中小型原水河渠污染事故的应急评价,可为应急响应决策提供支撑信息。

关键词：中小型原水河渠水污染危害度评价模型粗糙集理论

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Ground experiments and performance evaluation of the Low-Frequency Radio Spectrometer onboard the lander of Chang’e-4 mission

引用

Research in Astronomy and Astrophysics 2021年第5期21卷 139-146页

作者： Xin-Ying zhu Yan Su Yi-Cai Ji Hong-Bo Zhang Bo Zhao jun-duo Li Shun Dai Xi-Ping Xue Chun-Lai Li Key Laboratory of Lunar and Deep Space Exploration National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China Institute of Electronics Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

The Low-Frequency Radio Spectrometer(LFRS)is a scientific payload onboard the Chang’e-4 lunar lander launched in December *** LFRS provides in-situ measurements of the low-frequency radio phenomena on the far-side of theMoon for the first time in human *** evaluate the performance of the LFRS,a series of ground experiments are conducted using an engineering model of the *** is not easy to perform the experiments because the Electro Magnetic Interference(EMI)from the Chang’e-4 lunar lander itself and the environment is very *** results after EMI mitigation show that the sensitivity of the LFRS may be 10^(−18)W m^(−2)Hz^(−1).

关键词： Moon:far-side space vehicles:instruments techniques:spectroscopic

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

必须从国家战略的高度深刻认识粮食安全——对习近平总书记关于制止餐饮浪费行为重要指示精神的解读

引用

理论探讨 2020年第5期 5-10页

作者：竹立家中共中央党校(国家行政学院)公共管理教研部北京100091

近日,习近平总书记对制止餐饮浪费行为作出重要指示。针对餐饮浪费现象,习近平总书记提出要加强立法,强化监管,采取有效措施,建立长效机制,坚决制止餐饮浪费行为;要进一步加强宣传教育,切实培养节约习惯,在全社会营造浪费可耻、节约为... 详细信息

近日,习近平总书记对制止餐饮浪费行为作出重要指示。针对餐饮浪费现象,习近平总书记提出要加强立法,强化监管,采取有效措施,建立长效机制,坚决制止餐饮浪费行为;要进一步加强宣传教育,切实培养节约习惯,在全社会营造浪费可耻、节约为荣的氛围。党的十八大以来,习近平总书记在不同场合反复强调"粮食安全"问题,严厉痛斥食物浪费、餐饮浪费现象,原因在于中国粮食安全面临的"紧平衡"状态这一"基本国情"并没有变。2020年突如其来的新冠肺炎疫情在全世界的蔓延以及水灾、蝗灾和人祸的影响,不仅对世界经济造成严重危机,还对世界的粮食安全产生了重大冲击。粮食安全是推进我国新发展格局形成的重要战略保障,要实现"国内大循环为主体"的"双循环"新发展格局,要把"发展主动权必须牢牢掌握在自己手中",粮食安全具有基础性的战略意义。

关键词：习近平治国理政思想粮食安全餐饮浪费

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

裂纹扩展和裂尖变形机理的多尺度耦合数值模拟方法

引用

材料导报 2019年第14期33卷 2419-2425页

作者：盛鹰朱星亮曾祥国贾彬文军工程材料与结构冲击振动四川省重点实验室绵阳621000 西南科技大学土木工程与建筑学院绵阳621000 西南交通大学数学学院成都610031 四川大学建筑与环境学院成都610065

利用提出的多尺度五区数值模型,实现了单边裂纹的平板α铁在宏观载荷作用下三个不同尺度(原子尺度、细观尺度、连续介质尺度)力学参量之间的耦合及传递,模拟了裂尖变形和裂纹扩展的多尺度演化过程。根据多尺度五区数值模型将平板建设为... 详细信息

利用提出的多尺度五区数值模型,实现了单边裂纹的平板α铁在宏观载荷作用下三个不同尺度(原子尺度、细观尺度、连续介质尺度)力学参量之间的耦合及传递,模拟了裂尖变形和裂纹扩展的多尺度演化过程。根据多尺度五区数值模型将平板建设为五个区域。其中:Ⅴ区为宏观尺度区,利用有限元方法对单边裂纹板进行动态数值分析,基于虚拟裂纹闭合法(VCCT)计算应力强度因子KI;Ⅳ区为包围裂尖的细观尺度有限元模型,Ⅳ区与Ⅴ区宏观尺度模型通过有限宽板应力强度因子表达式联系,从而获得Ⅳ区细观断裂模型的应力边界,并将其用于有限元加载,获得该区的位移场;Ⅰ区为嵌在Ⅳ区内的分子动力学模型区,通过该区的分子动力学计算可获得裂纹扩展和裂尖变形的机制,模拟裂纹分叉、堆垛层错、空位微观变形与失效机制等;Ⅱ区和Ⅲ区为分子动力学Ⅰ区与连续介质Ⅳ区之间的交互影响区,有限元结果通过Ⅲ区为分子动力学区提供载荷条件,分子动力学结果借助于Ⅱ区修正有限元的边界条件,实现了原子尺度离散区与连续介质区力学参量之间相互影响的动态耦合。

关键词：裂纹扩展裂尖变形多尺度数值模型虚拟裂纹闭合法分子动力学

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

One-pot synthesis of natural-product inspired spiroindolines with anti-cancer activities

引用

Organic Chemistry Frontiers 2022年第3期9卷 682-686页

作者： Shi-Qiang Li Wei Yan Liu-jun He Ming Zhang Dian-Yong Tang Hong-yu Li Zhong-zhu Chen Zhi-Gang Xu College of Pharmacy National&Local Joint Engineering Research Center of Targeted and Innovative TherapeuticsIATTIChongqing University of Arts and SciencesChongqing 402160China Department of Pharmaceutical Sciences College of PharmacyUniversity of Arkansas for Medical SciencesLittle RockAR 72205USA Department of Internal Medicine College of MedicineUniversity of Arkansas for Medical SciencesLittle RockAR 72205USA Cancer Center Academy of Medical Sciences and Sichuan Provincial People’s HospitalAffiliated Hospital of University of Electronic Science and technology of ChinaChengduSichuan 610000China

A post-Ugi/diastereoselective cascade reaction was developed to construct naturally existing spiroindolines via a facile and metal-free one-pot *** the construction,a new C-C bond was formed through a selective 5-exo-dig indole cyclization on the propiolamide;and a new C-N bond was diastereoselectively formed which controlled the configuration of three chiral centers simultaneously.

关键词： synthesis spiro centers

来源：

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

FCC-HVDC换流变压器三相差动保护仿真研究

引用

电力系统保护与控制 2011年第20期39卷 115-119,124页

作者：许加柱白俊锋罗隆福李勇湖南大学电气与信息工程学院湖南长沙410082

根据FCC-HVDC系统中换流变压器绕组的具体接线形式,利用其数学模型推导三相保护的动作方程及差动电流表达式。用Matlab/Simulink建立变压器的三相保护模型,仿真结果验证了二次谐波制动原理在换流变压器内部故障时存在延时动作的可能。... 详细信息

根据FCC-HVDC系统中换流变压器绕组的具体接线形式,利用其数学模型推导三相保护的动作方程及差动电流表达式。用Matlab/Simulink建立变压器的三相保护模型,仿真结果验证了二次谐波制动原理在换流变压器内部故障时存在延时动作的可能。据此根据磁通特性原理鉴别法,从动作方程出发进行仿真分析,验证了该方法可以有效地区分换流变压器励磁涌流和故障电流。

关键词：高压直流输电系统换流变压器差动电流变压器保护励磁涌流

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Risk factors for renal outcomes in children with antineutrophil cytoplasmic antibody-associated vasculitis:a nationwide retrospective study in China

引用

World Journal of Pediatrics 2024年第5期20卷 506-516页

作者： Li-Wen Tan jun-Li Wan Chun-Hua zhu Hong Xu Zheng-Kun Xia Li-Zhi Chen Xiao-Chuan Wu Fang Wang Xiao-Rong Liu Cheng-Guang Zhao Xiao-Zhong Li jian-Hua Mao Xiao-Wen Wang Wen-Yan Huang Yu-Hong Li jian-jiang Zhang Shi-Pin Feng jun Yang jiao-jiao Liu Chun-Lin Gao Li-Ping Rong Lan-jun Shuai Ke Xu He-jia Zhang Qiu Li Ai-Hua Zhang Mo Wang Department of Nephrology Children’s Hospital of Chongqing Medical UniversityZhongshan 2nd Rd.136Chongqing400014China Ministry of Education Key Laboratory of Child Development and Disorders National Clinical Research Center for Child Health and DisordersChina International Science and Technology Cooperation Base of Child Development and Critical DisordersChildren’s Hospital of Chongqing Medical UniversityChongqingChina Chongqing Key Laboratory of Pediatrics Children’s Hospital of Chongqing Medical UniversityChongqingChina Department of Nephrology Children’s Hospital of Nanjing Medical University72 Guangzhou RoadNanjing210008China Department of Nephrology Children’s Hospital of Fudan UniversityNational Paediatric Medical Center of ChinaShanghaiChina Department of Pediatrics Jinling HospitalNanjing Medical UniversityNanjingChina Department of Pediatrics Jinling HospitalThe First School of Clinical MedicineSouthern Medical UniversityNanjingChina Department of Pediatrics Jinling HospitalMedical School of Nanjing UniversityNanjingChina Department of Pediatric Nephrology and Rheumatology The First Affiliated Hospital of Sun Yat-Sen UniversityGuangzhouChina Department of Pediatrics The Second Xiangya Hospital of Central South UniversityChangshaChina Department of Pediatrics Peking University First HospitalBeijingChina Department of Nephrology Beijing Children’s HospitalCapital Medical UniversityBeijing100045China National Center for Children’s Health BeijingChina Department of Pediatrics Shengjing Hospital of China Medical UniversityShenyangChina Department of Nephrology and Immunology Children’s Hospital of Soochow UniversitySuzhouChina Department of Nephrology Children HospitalZhejiang University School of MedicineHangzhouChina Department of Nephrology Wuhan Children’s Hospital(Wuhan Maternal and Child Healthcare Hospital)Tongji Medical CollegeHuazhong University of Science&TechnologyWuhanChina Department of Nephrology and Rheumatology Shanghai Children’s HospitalSchool

Background Pediatric antineutrophil cytoplasmic antibody-associated vasculitis(AAV)is a life-threatening systemic vasculitis featured by liability to renal ***,there are few studies on the risk factors and predictive models for renal outcomes of AAV in *** Data from 179 AAV children in multiple centers between January 2012 and March 2020 were collected *** risk factors and predictive model of end-stage renal disease(ESRD)in AAV were *** Renal involvement was the most typical manifestation(95.5%),and the crescent was the predominant pathological lesion(84.9%).The estimated glomerular filtration rate(eGFR)was evaluated in 114 patients,of whom 59.6%developed ESRD,and the median time to ESRD was 3.20 *** eGFR[P=0.006,odds ratio(OR)=0.955,95%confidence interval(CI)=0.924–0.987]and the percentages of global glomerulosclerosis(pGGS;P=0.018,OR=1.060,95%CI=1.010–1.112)were independent risk factors for ESRD of renal *** on the pGGS and eGFR at renal biopsy,we developed three risk grades of ESRD and one predictive *** Kaplan‒Meier curve indicated that renal outcomes were significantly different in different risk grades(P<0.001).Compared with serum creatinine at baseline,the predictive model had higher accuracy(0.86 versus 0.58,P<0.001)and a lower coefficient of variation(0.07 versus 0.92)in external *** Renal involvement is the most common manifestation of pediatric AAV in China,of which more than half deteriorates into *** predictive model based on eGFR at renal biopsy and the pGGS may be stable and accurate in speculating the risk of ESRD in AAV children.

关键词： Antineutrophil cytoplasmic antibody End-stage renal disease Glomerulonephritis Pediatric nephrology Vasculitis

来源：

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

Intron-targeted gene insertion in rice using CRISPR/Cas9: A case study of the Pi-ta gene

引用

The Crop Journal 2020年第3期8卷 424-431页

作者： Yang Xu Fangquan Wang Zhihui Chen jun Wang Wen-Qi Li Fangjun Fan Yajun Tao Ling Zhao Weigong Zhong Qian-Hao zhu Jie Yang Institute of Food Crops Jiangsu Academy of Agricultural Sciences/Nanjing Branch of Chinese National Center for Rice ImprovementNanjing 210014JiangsuChina jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops Yangzhou UniversityYangzhou 225009JiangsuChina Provincial Key Laboratory of Agrobiology Jiangsu Academy of Agricultural SciencesNanjing 210014JiangsuChina CSIRO Agriculture and Food GPO Box 1700Canberra ACT 2601Australia Institute of Life Science Jiangsu UniversityZhenjiang 212013JiangsuChina

Intron-targeted gene insertion strategy using CRISPR/Cas9(clustered regularly interspaced short palindromic repeats/CRISPR-associated Cas9) has been shown to be a potential tool for crop genetic improvement by targeted mutagenesis or gene replacement of an elite allele into widely cultivated rice varieties. The rice blast resistant protein Pi-ta, differs from its susceptible counterpart, pi-ta, by a single amino acid in exon 2. To create new materials resistant to the rice blast disease, we inserted a genomic fragment containing the exon 2 and 3′ untranslated region(3′ UTR) of Pi-ta into intron 1 of pi-ta in rice materials susceptible to rice blast using the intron-targeted insertion strategy. The gene insertion frequency was3.8%. Several novel transgene-free progeny with stably inherited homozygous insert were identified in the T_1 generation, which have been crossed to rice germplasm bearing other resistance gene(R gene) for pyramiding of R genes. This work verified the feasibility of using the genome editing technology in improvement of qualitative agronomic trait in crops.

关键词： Rice CRISPR/Cas9 Pi-ta Genome editing Molecular breeding

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：