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 it.Methods: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 analysis.Results: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 CO_(2) concentration 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+PGPE treatment improved the proportion of N,P,and K in the rhizome of P.polyphylla var.yunnanen

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

Prevalence and risk factors of cardiovascular diseases and psychological distress among female scientists and technicians

引用

Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2022年第12期23卷 1057-1064页

作者： Lijun ZHANG Yanping BAO Guo LI shuhui TAO Meiyan LIU Department of Psycho-Cardiology Beijing Anzhen HospitalCapital Medical UniversityBejing 100029China National Institute on Drug Dependence and Beijing Key Laboratory of Drug Dependence Peking UniversityBeijing 100191China School of Public Health Peking UniversityBejing 100191China Henan Medical School Henan UniversityKaifeng 475001China

This study aimed to explore the prevalence and risk factors of cardiovascular disease(CVD)and psychological distress among female scientists and technicians in China.Accordingly,we included scientists and technicians from representative research institutions,medical institutions,colleges,universities,and businesses in China,and the data were collected from July 1,2019 to March 31,2021 via online questionnaires.The parameters evaluated in this study included age,sex,marital status,educational background,monthly income,sleep hours,sleep problems,smoking,alcohol consumption,work-related stress,work burnout,cardiovascular symptoms,CVD,family history,and depressive and anxiety symptoms.A total of 14530 scientists and technicians were included,comprising 7144 men and 7386 women.We found 34.9%men and 16.6%women with CVD,35.1%men and 21.4%women with depressive symptoms,28.7%men and 13.8%women with anxiety symptoms,and 22.0%men and9.5%women with CVD combined with depressive or anxiety symptoms.This study focused on the details of women.Younger women(age≤35 years)had the highest prevalence of depressive symptoms(24.9%),anxiety symptoms(16.2%),and comorbidity(11.2%).It was established that,despite traditional risk factors,unmanageable work burnout,depressive symptoms,and anxiety symptoms were associated with a higher risk of CVD in women;insomnia,overwhelming work stress,unmanageable work burnout,and CVD were linked to a higher risk of depressive symptoms and anxiety;insomnia,overwhelming work stress,and unmanageable work burnout were related to CVD combined with depressive or anxiety symptoms.A bidirectional relationship was noted between CVD and depression or anxiety in female scientists and technicians,and insomnia and overwhelming work stress were positively associated with comorbidity.It is suggested that effective measures should be taken to protect female scientists and technicians from CVD and psychological distress.

关键词： Female scientist and technician Depressive symptom Anxiety Insomnia Cardiovascular disease(CVD)

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

企业主导逻辑与关键核心技术突破——基于华为公司5G项目访谈的案例研究

引用

科技和产业 2024年第2期24卷 7-14页

作者：韩淑慧汪涛北京理工大学管理与经济学院北京100081 北京理工大学长三角研究院浙江嘉兴314000

随着数字经济的发展,新一代信息通信技术的关键核心技术突破也愈加受到关注。企业主导逻辑的研究为分析关键核心技术突破提供了新视角。通过对华为5G技术突破的纵向案例研究,总结了企业在5G关键核心技术突破过程中所遵循的主导逻辑,说... 详细信息

随着数字经济的发展,新一代信息通信技术的关键核心技术突破也愈加受到关注。企业主导逻辑的研究为分析关键核心技术突破提供了新视角。通过对华为5G技术突破的纵向案例研究,总结了企业在5G关键核心技术突破过程中所遵循的主导逻辑,说明了不同阶段的主导逻辑对企业关键核心技术突破具有差异化影响,最后凝练出企业主导逻辑推动关键核心技术突破的作用机制和演化过程模型。

关键词：关键核心技术突破主导逻辑新一代通信技术案例研究

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

陶行知的高等教育改革创举及其教育家精神新探

引用

江苏高教 2024年第1期 41-48页

作者：王运来杜淑惠南京大学教育研究院南京210023

陶行知是一位实现了教育家精神和改革家实践耦合发展的大先生,是“革命的教育家”和“教育家的革命”的典范。在投身平民教育运动之前,他业已在我国高等教育革新方面做出了若干具有里程碑意义的创举,包括力主首开“女禁”,开辟中国女子... 详细信息

陶行知是一位实现了教育家精神和改革家实践耦合发展的大先生,是“革命的教育家”和“教育家的革命”的典范。在投身平民教育运动之前,他业已在我国高等教育革新方面做出了若干具有里程碑意义的创举,包括力主首开“女禁”,开辟中国女子高等教育新天地;首倡“教学法”,以“学”为中心引领全国;引进“选科制”,拉开我国高校通识教育大幕;创办“暑期学校”,发出以教育改造社会之嚆矢。除了大爱、奉献、创造、求真这“四种精神”之外,“平等精神”也在陶行知精神图谱上占有重要位置,因为他主张师生平等、男女平等;呼吁教学相长,“教”“学”平等;倡导知行合一,“劳力”与“劳心”平等;追求“立脚点上求平等,于出头处谋自由”。

关键词：陶行知高等教育改革平等精神陶行知“五种精神”

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

黄草乌间作玉米对其根际微生物群落多样性的影响

引用

分子植物育种 2024年第7期22卷 2281-2289页

作者：吴加香刘涛寸梦壵徐志勇罗曌字淑慧云南农业大学西南中药材种质创新与利用国家地方联合工程研究中心昆明650201

为揭示乌头属黄草乌间作对其根际土壤微生物群落结构和多样性的影响,本研究分别采集黄草乌单作(S)、黄草乌间作玉米2∶1模式(I1)和4∶2模式(I2)的黄草乌根际土壤,利用Illumina-MiSeq高通量测序技术分析真菌和细菌群落组成及多样性。结... 详细信息

为揭示乌头属黄草乌间作对其根际土壤微生物群落结构和多样性的影响,本研究分别采集黄草乌单作(S)、黄草乌间作玉米2∶1模式(I1)和4∶2模式(I2)的黄草乌根际土壤,利用Illumina-MiSeq高通量测序技术分析真菌和细菌群落组成及多样性。结果表明:黄草乌间作玉米提高了黄草乌根际土壤中微生物群落的丰富度和多样性;黄草乌根际土壤的优势细菌门为芽单胞菌门、变形菌门、酸杆菌门和放线菌门,主要的优势细菌属有12种;优势真菌门为被孢霉门、子囊菌门、和担子菌门,主要的优势真菌属有8种。冗余分析(RDA)显示,有效磷和全钾含量对土壤微生物群落结构的影响强度最大;相关性分析也表明,土壤理化指标均与不同优势菌门存在密切的相关关系。本研究通过高通量测序方法,分析黄草乌与玉米间作对根际微生物群落结构的影响,这为进一步揭示黄草乌间作优势机理提供一定理论依据。

关键词：草乌间作根际土壤微生物群落多样性

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

Optimal charge inhomogeneity for the d+id-wave superconductivity in the intercalated graphite CaC_(6)

引用

Frontiers of physics 2023年第3期18卷 113-119页

作者： shuhui Yang tao Ying School of Physics Harbin Institute of TechnologyHarbin 150001China

The coexistence of superconductivity and charge inhomogeneity was observed in many cuprate superconductors.The relationship between those two is still controversial.Similarly,in the graphene sheets of the intercalated graphitic superconductor CaC_(6),the charge inhomogeneity was also observed.We simulate such a system by constructing the Hubbard model on the honeycomb lattice with charge inhomogeneity imposed by force.Utilizing the finite-temperature determinant quantum Monte Carlo algorithm,we examine the relationship between the superconducting pairing and the charge inhomogeneity.An optimal charge inhomogeneity for the d+id-wave pairing is found.While for other artificial charge inhomogeneities,the d+id-wave pairing is monotonically suppressed.The possibleπ-phase shift induced by charge inhomogeneity is also examined.

关键词： intercalated graphitic superconductor charge inhomogeneity Hubbard model d+id-wave pairing

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

Enrichment of Nb and Ti from carbonatite pyrochlore ore via calcining-slaking followed by gravity separation

引用

International Journal of Mining Science and Technology 2022年第3期32卷 615-626页

作者： shuhui Zhang Mingjun Rao Rendong Xiao Jinxiang You Guanghui Li tao Jiang School of Minerals Processing&Bioengineering Central South UniversityChangsha 410083China

In this work,a novel process consisting of calcining-slaking followed by gravity separation for the enrichment of niobium(Nb)and titanium(Ti)from carbonatite pyrochlore ore was proposed,validated and compared with the current mainstream flotation method.During calcining of the pyrochlore ore,within which the carbonates were transformed into lime.Subsequently,when the calcined ore was slaked,lime was transformed into hydroxide with fine particles which were amenable to gravity separation.After calcining at 900℃for 60 min,slaking at 90℃for 10 min with a liquid–solid ratio of 3:1(mL/g),approximately 40%of tailings can be removed by gravity separation,the recoveries of Nb and Ti were 94.7%and 91.0%,and the enrichment ratios of Nb and Ti were 1.61 and 1.43,respectively.The new approach exhibits high separation efficiency of carbonate gangue minerals and valuable minerals,satisfactory recoveries of niobium as well as titanium can be achieved.

关键词： Niobium Titanium Pyrochlore ore Calcination Gravity 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

Apple grading method based on neural network with ordered partitions and evidential ensemble learning

引用

CAAI Transactions on Intelligence Technology 2022年第4期7卷 561-569页

作者： Liyao Ma Peng Wei Xinhua Qu shuhui Bi Yuan Zhou tao Shen School of Electrical Engineering University of JinanJinanChina Blekinge Institute of Technology KarlskronaSweden

In order to improve the performance of the automatic apple grading and sorting system,in this paper,an ensemble model of ordinal classification based on neural network with ordered partitions and Dempster–Shafer theory is proposed.As a non-destructive grading method,apples are graded into three grades based on the Soluble Solids Content value,with features extracted from the preprocessed near-infrared spectrum of apple serving as model inputs.Considering the uncertainty in grading labels,mass generation approach and evidential encoding scheme for ordinal label are proposed,with uncertainty handled within the framework of Dempster–Shafer theory.Constructing neural network with ordered partitions as the base learner,the learning procedure of the Bagging-based ensemble model is detailed.Experiments on Yantai Red Fuji apples demonstrate the satisfactory grading performances of proposed evidential ensemble model for ordinal classification.

关键词： apple grading Demspter-Shafer theory ensemble learning ordinal classification

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

4株滇重楼内生真菌诱导甾体皂苷合成机制

引用

分子植物育种 2024年第8期22卷 2762-2771页

作者：任锡跃李艳冰陈严平斯那永宗字淑慧刘涛云南农业大学农学与生物技术学院昆明650201 迪庆州德钦县农业综合服务中心迪庆674499

内生真菌能通过代谢促进植物生长,还能够刺激药用植物中有用成分的积累。针对滇重楼生长缓慢,药用成分积累所需周期长等问题,本研究选用4株内生真菌并接种滇重楼幼苗,检测宿主植物学性状、光合特性、甾体皂苷含量以及合成甾体皂苷关键... 详细信息

内生真菌能通过代谢促进植物生长,还能够刺激药用植物中有用成分的积累。针对滇重楼生长缓慢,药用成分积累所需周期长等问题,本研究选用4株内生真菌并接种滇重楼幼苗,检测宿主植物学性状、光合特性、甾体皂苷含量以及合成甾体皂苷关键基因的表达水平,从生理生态递进到分子层面,对共生机制进行剖析。研究表明,4株滇重楼内真菌都具有固氮和产吲哚乙酸(indoleacetic acid,IAA)的能力,并促进生物量的积累;木霉菌(8-6)能显著提高滇重楼幼苗的光合能力;人参生柱隔孢(8-13)促进了皂苷含量的积累;实时定量PCR显示总皂苷积累可能与皂苷合成途径基因的上调表达有关。本研究结果为内生真菌用作滇重楼促生长的微生物菌肥的研究提供理论依据。

关键词：滇重楼内生真菌促生能力

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

Near-infrared optoelectronic synapses based on a Te/α-In2Se3 heterojunction for neuromorphic computing

引用

Science China(Information Sciences) 2023年第6期66卷 53-62页

作者： tao YAN Yuchen CAI Yanrong WANG Jia YANG shuhui LI Xueying ZHAN Fengmei WANG Ruiqing CHENG Feng WANG Jun HE Zhenxing WANG CAS Key Laboratory of Nanosystem and Hierarchical Fabrication National Center for Nanoscience and Technology Key Laboratory of Carbon Fiber and Functional Polymers Ministry of EducationBeijing University of Chemical Technology Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Key Laboratory of Artificial Micro-and Nano-Structures of Ministry of Education School of Physics and TechnologyWuhan University

Neuromorphic computing based on artificial optoelectronic synapses has attracted considerable attention owing to its high time/power efficiency and parallel processing capability. However, existing devices are mainly suitable for only the visible range. Here, high-performance near-infrared optoelectronic memories and synapses were demonstrated using Te/α-In2Se3heterostructures. Owing to the entangled ferroelectricitysemiconducting properties of α-In2Se3, whose ferroelectric polarizations can be switched by photocarriers that migrated from the Te near-infrared light absorber, the device could be set into a non-volatile highresistance/low-resistance state through the application of positive gate voltages/near-infrared light pulses.Hence, the device could function as a high-performance photodetector, with a photoresponsive on/off ratio of 5.25 × 104/8.3 × 103and a specific detectivity of 2.6 × 1011/7.5 × 1010Jones at 1550/1940 nm. In addition,the device could function as a multi-state optoelectronic synapse with good stability and high linearity;moreover, using the device, we developed an optoelectronic artificial neural network with high recognition accuracies of 100% and 89.9% for a database composed of 64-pixel letters with 10% and 70% noise levels,respectively. Our work provides a feasible avenue for developing neuromorphic networks applicable in the infrared range.

关键词： near infrared phototransistor two-dimensional ferroelectric semiconductor artificial neural networks optoelectronic synapses

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

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：