检索结果-南通市图书馆

Arbuscular mycorrhiza and plant growth promoting endophytes facilitates accumulation of saponin under moderate drought stress

引用

Chinese Herbal Medicines 2024年第2期16卷 214-226页

作者： Shubiao Qian qing Zhang Sha Li Rui shi Xiahong He Shuhui Zi Tao Liu Yunnan Agricultural University Kunming 650201China National&Local Joint Engineering Research Center on Gemplasm Utilization&Innovation of Chinese Medicinal Materials in Southwest China Yunnan Agricultural UniversityKunming 650201China Institute of Sericulture and Honeybee Honghe 661101China Southwest Forestry University Kunming 650201China

Objective: Paris polyphylla var. yunnanensis, one of the important medicinal plant resources in Yunnan,China, usually takes 6–8 years to be harvested. Therefore, it is urgent to find a method that can not only shorten its growth years, but also improve its quality. In this study, we examined the effects of a combination treatment of arbuscular mycorrhizal fungi(AMF) and plant growth-promoting endophytes(PGPE)and drought stress on the accumulation of saponins in ***: P. polyphylla var. yunnanensis was infected with a mixture of AMF and PGPE under drought stress. The content of saponins, as well as morphological, physiological, and biochemical indicators, were all measured. The UGTs gene related to saponin synthesis was obtained from transcriptome data by homologous comparison, which were used for RT-PCR and phylogenetic ***: Regardless of water, AMF treatment could infect the roots of P. polyphylla var. yunnanensis, however double inoculation with AMF and PGPE(AMF + PGPE) would reduce the infection rate of AMF. Plant height, aboveground and underground fresh weight did not differ significantly between the single inoculation AMF and the double inoculation treatment under different water conditions, but the inoculation treatment significantly increased the plant height of P. polyphylla var. yunnanensis compared to the noninoculation treatment. Single inoculation with AMF considerably increased the net photosynthetic rate,stomatal conductance, and transpiration rate of P. polyphylla var. yunnanensis leaves under various water conditions, but double inoculation with AMF + PGPE greatly increased the intercellular CO2concentration and chlorophyll fluorescence parameter(Fv/Fm). Under diverse water treatments, single inoculation AMF had the highest proline content, whereas double inoculation AMF + PGPE may greatly improve the amount of abscisic acid(ABA) and indoleacetic acid(IAA) compared to normal water under moderate drought. Double inoculation AMF + P

关键词： arbuscular mycorrhizal fungi gene expression Paris polyphylla Smith var.yunnanensis (Franch.)Hand.-Mazz plant growth-promoting endophytes steroidal saponin

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

Therapeutic effects of Lingguizhugan decoction in a rat model of high-fat diet-induced insulin resistance

引用

World Journal of Diabetes 2024年第6期15卷 1291-1298页

作者： Xiao-Ming Liu shi-qing Yuan Ying Ning shi-Jia Nie Xu-Qiong Wang Hong-Yi Jia Xiu-Li Zheng Department of Basic Medicine School of Basic Medicine Chengdu University of Traditional Chinese MedicineChengdu 611137Sichuan ProvinceChina Department of Clinical Medicine Chengdu University of Traditional Chinese MedicineChengdu 610072Sichuan ProvinceChina

BACKGROUND Lingguizhugan(LGZG)decoction is a widely used classic Chinese medicine formula that was recently shown to improve high-fat diet(HFD)-induced insulin resistance(IR)in animal *** To assess the therapeutic effect of LGZG decoction on HFD-induced IR and explore the potential underlying *** To establish an IR rat model,a 12-wk HFD was administered,followed by a 4-wk treatment with *** determination of IR status was achieved through the use of biochemical tests and oral glucose tolerance *** a targeted metabolomics platform to analyze changes in serum metabolites,quantitative real-time PCR(qRT-PCR)was used to assess the gene expression of the ribosomal protein S6 kinase beta 1(S6K1).RESULTS In IR rats,LGZG decreased body weight and indices of hepatic *** effectively controlled blood glucose and food intake while protecting islet *** analysis revealed significant differences between the HFD and HFDLGZG *** intervention reduced branched-chain amino acid *** of IR-related metabolites such as tryptophan,alanine,taurine,and asparagine decreased *** may be linked to amino acids due to the contemporaneous increase in S6K1 expression,as shown by *** Our study strongly suggests that LGZG decoction reduces HFD-induced *** may activate S6K1 via metabolic *** findings lay the groundwork for the potential of LGZG as an IR treatment.

关键词： Lingguizhugan decoction High-fat diet-induced insulin resistance Amino acid metabolism S6K1

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

Effects and mechanisms of Helicobacter pylori infection on the occurrence of extra-gastric tumors

引用

World Journal of Gastroenterology 2024年第37期30卷 4090-4103页

作者： shi-qing Zhao Hui-Ling Zheng Xiao-Tian Zhong Zi-Ye Wang Yi Su Yan-Yan shi Research Center of Clinical Epidemiology Peking University Third HospitalBeijing 100191China Health Science Center Peking UniversityBeijing 100191China Department of Gastroenterology Peking University Third HospitalBeijing 100191China

Helicobacter pylori(***)colonizes the human stomach and many studies have discussed the mechanisms of *** infection leading to gastric diseases,including gastric ***,increasing data have shown that the infection of *** may contribute to the development of extra-gastric diseases and ***,systemic immune responses,microbiome disorders,and hypergastrinemia caused by *** infection are associated with many extra-gastric *** review highlights recent discoveries;discusses the relationship between *** and various extra-gastric tumors,such as colorectal cancer,lung cancer,cholangiocarcinoma,and gallbladder carcinoma;and explores the mechanisms of extra-gastric carcinogenesis by ***,these findings refine our understanding of the pathogenic processes of ***,provide guidance for the clinical treatment and management of ***-related extra-gastric tumors,and help improve prognosis.

关键词： Helicobacter pylori Extra-gastric tumors Immune system response Mucosal barrier Gut microbiome

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

基于消费习惯与生产的资产定价模型

引用

上海交通大学学报 2008年第9期42卷 1561-1565页

作者：朱微亮刘海龙史青青上海交通大学金融工程研究中心上海200052

基于一般均衡资产定价模型,研究了存在外生的消费习惯及可调整的生产成本对股票价格的影响,证明了股票的预期收益率是无风险利率、企业绩效定价因子、市值/账面值比率因子以及企业规模因子的线性函数.结果表明:企业的绩效、行业发展前... 详细信息

基于一般均衡资产定价模型,研究了存在外生的消费习惯及可调整的生产成本对股票价格的影响,证明了股票的预期收益率是无风险利率、企业绩效定价因子、市值/账面值比率因子以及企业规模因子的线性函数.结果表明:企业的绩效、行业发展前景、企业研发能力与企业股票预期收益率正相关;企业规模及企业的市值/账面值比率与企业股票预期收益率负相关.

关键词：消费习惯资产定价模型预期股票收益率

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

玉米器官生长相关性对水分胁迫的响应

引用

节水灌溉 2023年第10期 11-17页

作者：时晴晴李炎王仰仁天津农学院水利工程学院天津300392

作物生长相关性及其对水分胁迫的响应是建立物质分配模型,模拟作物生长的重要依据。利用山西省霍泉试验站夏玉米(4a)和文峪河试验站春玉米(2a)资料分析得出:玉米茎叶比、粒茎比和根冠比随发育时间分别呈S形、指数函数和幂函数曲线变化,... 详细信息

作物生长相关性及其对水分胁迫的响应是建立物质分配模型,模拟作物生长的重要依据。利用山西省霍泉试验站夏玉米(4a)和文峪河试验站春玉米(2a)资料分析得出:玉米茎叶比、粒茎比和根冠比随发育时间分别呈S形、指数函数和幂函数曲线变化,霍泉茎叶比、粒茎比和文峪河根冠比的实测值与模拟值的相关系数均在0.8以上,拟合精度较高。两站6a都受到了不同程度的水分胁迫,且水分胁迫大多发生在抽雄灌浆期。水分胁迫指数σ可以很好地描述作物生长相关性对水分胁迫的响应,其中春玉米根冠比受水分胁迫影响最大(σ值最大,为0.166),夏玉米(σ值为3.7×10^(-3))和春玉米茎叶比(σ值为1.5×10^(-4))受水分胁迫影响均较小,霍泉夏玉米粒茎比(σ值为0.065)的受水分胁迫影响较文峪河春玉米(σ值为1.0×10^(-8))大。

关键词：水分胁迫玉米生长相关性茎叶比粒茎比根冠比

来源：

维普期刊数据库博看期刊

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

中国信贷市场存在过度供给吗

引用

财经研究 2010年第7期36卷 135-143页

作者：史青青费方域上海交通大学安泰经济与管理学院上海200052

文章利用2001年1月至2010年4月中国信贷市场月度数据,采用最大似然估计方法分析信贷供求,研究中国信贷市场是否存在信贷过度供给现象。实证结果表明:(1)在总量上,2005-2007年存在过度需求,2002-2004年以及2009年特别是2009年1-3月存在... 详细信息

文章利用2001年1月至2010年4月中国信贷市场月度数据,采用最大似然估计方法分析信贷供求,研究中国信贷市场是否存在信贷过度供给现象。实证结果表明:(1)在总量上,2005-2007年存在过度需求,2002-2004年以及2009年特别是2009年1-3月存在过度供给,目前信贷市场基本平衡;(2)在结构上,信贷失衡更多反映在企业部门,居民部门信贷供求失衡比例在[-10%,10%]内波动。

关键词：信贷过度供给最大似然估计结构性失衡

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

Ultra-high-rate Bi anode encapsulated in 3D lignin-derived carbon framework for sodium-ion hybrid capacitors

引用

Rare Metals 2024年第3期43卷 1037-1047页

作者： Ze-Hua Lin Xue-qing Qiu Xi-Hong Zu Xiao-Shan Zhang Lei Zhong shi-Rong Sun Shu-Hua Hao Ying-Juan Sun Wen-Li Zhang School of Chemical Engineering and Light Industry Guangdong University of Technology(GDUT)Guangzhou510006China Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory(Rongjiang Laboratory) Jieyang515200China School of Advanced Manufacturing Institute of Green Chemistry and Advanced MaterialsGuangdong University of TechnologyJieyang515200China

Bismuth(Bi),as an alloy-based anode material,has attracted much atte ntion in the developme nt of sodiumion hybrid capacitors(SIHCs)due to its high theoretical ***,the volume expansion of the Bi-based anode during the sodiation/desodiation process results in limited rate *** the present work,a porous Bi-based composite was constructed by a one-step hydrothermal method,and Bi was encapsulated in ligninderived nitrogen-doped porous carbon(Bi@LNPC)after *** obtained Bi nanoparticles could effectively adapt to the strain and shorten the diffusion distance of Na^(+).In addition,porous carbon skeleton provides a rigid conductive network for electronic ***,the assembled sodium-ion half-cell with Bi@LNPC anode shows ultra-high-rate *** the current density was enhanced from 0.1 to 50 A·g^(-1),the specific capacity decreased slightly from 351.5 to 342.8 mAh·g^(-1).Even at an extremely high current density of 200 A·g^(-1),it retains 81.3%capacity retention when compared to a current density of 1 A·g^(-1).The SIHCs assembled by Bi@LNPC show a high energy density of 63 Wh·kg^(-1).This work provides an effective method for developing high-rate Bi anode materials for sodium-ion hybrid capacitors(SIHCs)and sodium-ion batteries(SIBs).

关键词： Bismuth Lignin Sodium-ion batteries Sodium-ion hybrid capacitors Rate Porous carbon

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

Modulation of starch synthesis in Arabidopsis via phytochrome B-mediated light signal transduction

引用

Journal of Integrative Plant Biology 2024年第5期66卷 973-985页

作者： qingbiao shi Ying Xia Na Xue Qibin Wang qing Tao Mingjing Li Di Xu Xiaofei Wang Fanying Kong Haisen Zhang Gang Li National Key Laboratory of Wheat Improvement College of Life SciencesShandong Agricultural UniversityTai'an 271018China National Key Laboratory of Wheat Improvement College of AgronomyShandong Agricultural UniversityTai'an 271018China

Starch is a major storage carbohydrate in plants and is critical in crop yield and *** synthesis is intricately regulated by internal metabolic processes and external environmental cues;however,the precise molecular mechanisms governing this process remain largely *** this study,we revealed that high red to far-red(high R:FR)light significantly induces the synthesis of leaf starch and the expression of synthesis-related genes,whereas low R:FR light suppress these *** phytochrome B(phyB),the primary R and FR photoreceptor,was identified as a critical positive regulator in this *** of phyB,basic leucine zipper transcription factor ELONGATED HYPOCOTYL5(HY5)was found to enhance starch synthesis,whereas the basic helix-loop-helix transcription factors PHYTOCHROME INTERACTING FACTORs(PIF3,PIF4,and PIF5)inhibit starch synthesis in Arabidopsis ***,HY5 and PIFs directly compete for binding to a shared G-box cis-element in the promoter region of genes encoding starch synthases GBSS,SS3,and SS4,which leads to antagonistic regulation of their expression and,consequently,starch *** findings highlight the vital role of phyB in enhancing starch synthesis by stabilizing HY5 and facilitating PIFs degradation under high R:FR light ***,under low R:FR light,PIFs predominantly inhibit starch *** study provides insight into the physiological and molecular functions of phyB and its downstream transcription factors HY5 and PIFs in starch synthesis regulation,shedding light on the regulatory mechanism by which plants synchronize dynamic light signals with metabolic cues to module starch synthesis.

关键词： Arabidopsis thaliana HY5 light signal phyB PIFs starch synthesis

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

Research Progress in the Fabrication of Covalent Organic Framework Membranes for Chemical Separations

引用

Chinese Journal of Polymer Science 2024年第2期42卷 141-158,I0005页

作者： Cui-Ting Ding Jin-Qiu Yuan Meng-Ying Xie qing-Yuan Liu Zeng-Guang Yao shi-Yu Zhang Run-Nan Zhang Hong Wu Zhong-Yi Jiang Key Laboratory for Green Chemical Technology of Ministry of Education School of Chemical Engineering and TechnologyTianjin UniversityTianjin300072China Zhejiang Institute of Tianjin University NingboZhejiang315201China Haihe Laboratory of Sustainable Chemical Transformations Tianjin300192China Tianjin Key Laboratory of Membrane Science and Desalination Technology Tianjin UniversityTianjin300072China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityBinhai New CityFuzhou350207China

Membrane technology has become one of the most promising separation technologies for its energy saving, high separation efficiency, environmental friendliness, and economic feasibility. Covalent organic frameworks(COFs) with intrinsically high porosity, controllable pore size, uniform pore size distribution and long-range ordered channel structure, have emerged as next-generation materials to fabricate advanced separation membranes. This feature article summarizes some latest studies in the development of pure COF membranes in our lab, including their fabrication and applications in chemical separations. Finally, current challenges facing high-performance COF separation membranes are discussed.

关键词： Covalent organic frameworks Covalent organic framework membranes Water treatment Organic solvent nanofiltration Gas separation

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

Atomic-Scale Insights into Damage Mechanisms of GGr15 Bearing Steel Under Cyclic Shear Fatigue

引用

Acta Metallurgica Sinica(English Letters) 2024年第7期37卷 1265-1278页

作者： Qiao-Sheng Xia Dong-Peng Hua qing Zhou Ye-Ran shi Xiang-Tao Deng Kai-Ju Lu Hai-Feng Wang Xiu-Bing Liang Zhao-Dong Wang State Key Laboratory of Solidification Processing Center of Advanced Lubrication and Seal MaterialsNorthwestern Polytechnical UniversityXi’an710072China State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang110819China Defense Innovation Institute Academy of Military ScienceBeijing100071China

Alternating shear stress is a critical factor in the accumulation of damage during rolling contact fatigue,severely limiting the service life of ***,the specific mechanisms responsible for the cyclic shear fatigue damage in bearing steel have not been fully *** the mechanical response and microstructural evolution of a model GGr15 bearing steel under cyclic shear loading are investigated through the implementation of molecular dynamics *** samples undergo 30 cycles under three different loading conditions with strains of 6.2%,9.2%,and 12.2%,*** findings indicate that severe cyclic shear deformation results in early cyclic softening and significant accumulation of plastic damage in the bearing ***,samples subjected to higher strain-controlled loading exhibit higher plastic strain energy and shorter fatigue ***,strain localization is identified as the predominant damage mechanism in cyclic shear fatigue of the bearing steel,which accumulates and ultimately results in fatigue ***,simulation results also revealed the microstructural reasons for the strain localization(e.g.,BCC phase transformation into FCC and HCP phase),which well explained the formation of white etching *** study provides fresh atomic-scale insights into the mechanisms of cyclic shear fatigue damage in bearing steels.

关键词： Cyclic shear fatigue Molecular dynamic simulation Bearing steels Plastic damage accumulation

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

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：