检索结果-南通市图书馆

Physiological Response Mechanism and Drought Resistance Evaluation of Passiflora edulis Sims under Drought Stress

Phyton-International Journal of Experimental Botany 2024年第6期93卷 1345-1363页

作者： Binyang Zhao Fengchan Wu Guojun cai peiyu Xi Yulin Guo Anding Li College of Forestry Guizhou UniversityGuiyang550025China Guizhou Institute of Biology Guizhou Academy of SciencesGuiyang550009China College of Resources and Environment Hunan Agricultural UniversityChangsha410128China

In order to explore the response mechanism of Passiﬂora edulis Sims to drought stress,the changes in morpho-logical and physiological traits of Passiﬂora edulis Sims under different drought conditions were studied.A total of 7 germplasm resources of Passiﬂora edulis Sims were selected and tested under drought stress by the pot culture method under 4 treatment levels:75%–80%(Control,CK)of maximumﬁeld water capacity,55%–60%(Light Drought,LD)of maximumﬁeld water capacity,i.e.,mild drought,40%–45%(Moderate Drought,MD)of max-imumﬁeld water capacity,i.e.,moderate drought and 30%–35%(Severe Drought,SD)of maximumﬁeld water capacity,i.e.,severe *** the 40th day of drought treatment,13 indices,including seedling growth mor-phology,physiology,and biochemistry,were *** results showed that under drought stress,the height and ground diameter of *** Sims gradually decreased with increasing drought stress,and there were signiﬁ-cant differences in seedling height and ground diameter among the *** stress signiﬁcantly inhib-ited the growth of seven *** Sims *** contents of soluble sugar(SS),soluble protein(SP),proline(Pro),and other substances in *** Sims basically increased with increasing drought *** the aggrava-tion of drought stress,the malondialdehyde(MDA)content of *** Sims tended to increase to different degrees,the superoxide dismutase(SOD)activity and peroxidase(POD)activity both tended to increase atﬁrst and then decrease,and the change in catalase(CAT)activity mostly showed a gradual increasing *** con-tents of endogenous hormones in *** Sims signiﬁcantly differed under different degrees of drought *** the aggravation of drought stress,the abscisic acid(ABA)content of *** Sims tended to increase,whereas the contents of gibberellin(GA),indoleacetic acid(IAA),and zeatin nucleoside(ZR)exhibited a down-ward trend.A comprehensive evaluation of the drought resistance of seven *** Sim

关键词： Drought resistance water stress phytohormone morphological trait physiological traits

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

Tuning the Structure of Fe-Tetracarboxylate Frameworks Through Linker-Symmetry Reduction

引用

CCS Chemistry 2021年第2期3卷 1701-1709页

作者： Jiandong Pang Christina T.Lollar Sai Che Jun-Sheng Qin Jialuo Li peiyu cai Mingyan Wu Daqiang Yuan Maochun Hong Hong-cai Zhou Department of Chemistry Texas A&M UniversityCollege StationTX 77843-3255 State Key Laboratory of Structure Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhouFujian 350002 State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryInternational Center of Future ScienceJilin UniversityChangchun 130012 University of Chinese Academy of Sciences Beijing 100049

The design and synthesis of stable metal–organic frameworks(MOFs)have been a core obstacle in the widespread application of these functional crystalline porous materials,because of the stability limitations of MOFs under harsh operating ***,a highly stable microporous MOF based on the Fe_(3)O cluster(PCN-678)has been synthesized using a tetracarboxylate *** symmetry reduced tetratopic carboxylate ligand,a mesoporous MOF(PCN-668)could be obtained in which nanoscale cage-like building units and one-dimensional(1D)channels *** neighboring cages were mutual diastereomers in PCN-668 due to the further reduction of the Cs symmetry of the free ligand to C1 symmetry after ***,the acid stability of this mesoporous MOF was improved via postsynthetic metal exchange to chromium(PCN-668-Cr).The PCN-668-Cr exhibited very high stability in both acidic and basic aqueous solutions(pH=1–11).Additionally,the mesoporous MOF showed a high total gravimetric methane uptake(∼500 cm^(3) g^(−1) at 100 bar),while the microporous MOF showed a high volumetric methane storage capacity of 147 cm3 cm−3 at room temperature.

关键词： metal–organic framework mesoporous,highly stable diastereomeric cage methane uptake

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

Experimental and theoretical analysis of loading characteristics of electret filter media for charged particles

引用

Particuology 2024年第10期93卷 87-98页

作者： Yiqi cai Rongrong cai Lizhi Zhang Key Laboratory of Enhanced Heat Transfer and Energy Conservation of Education Ministry School of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou510640China State Key Laboratory of Subtropical Building Science South China University of TechnologyGuangzhou510640China

The degradation of filtration performance in electret filter media during usage poses a significant challenge. Pre-charging of aerosols has been identified as an effective method to mitigate this issue. However, the effects of particle charging characteristics on the loading characteristics of electret filters still need a comprehensive understanding. In this study, a needle-cylinder corona charger was employed to pre-charge aerosols, and the particle charge state was determined by multiphysics simulation. The effects of particle charge polarity and charge quantity on the loading performance of the electret filter were quantitatively investigated. The results showed that the particle charge polarity had a negligible impact on the loading performance under the condition of the equivalent particle charge quantity. In addition, the charged particles effectively improved the efficiency degradation during the loading process of electret media, with higher charge quantities resulting in more pronounced improvements. The electrostatic attenuation factor showed a negative exponential correlation with the particle charge quantity. This was attributed to the uneven particle deposition on fiber surface due to the attraction of charged particles by the opposite charges on the electret fibers, which alleviated the effect of electrostatic shielding.

关键词： Electret filter Charged particles Loadingcharacteristic Corona charging Electrostatic screening

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

大数据背景下突发公共安全事件应急指挥研究

引用

广州市公安管理干部学院学报 2020年第4期30卷 3-8页

作者：蔡佩玉广州市公安局警察训练部

当前,我国社会已逐渐进入大数据时代,大数据对社会突发公共安全事件的应急指挥具有重大的意义和作用。在大数据背景下,我国当前的突发公共安全事件应急指挥仍存在的一些问题,应有针对性地有采取有效措施,进一步推进大数据在突发公共安... 详细信息

当前,我国社会已逐渐进入大数据时代,大数据对社会突发公共安全事件的应急指挥具有重大的意义和作用。在大数据背景下,我国当前的突发公共安全事件应急指挥仍存在的一些问题,应有针对性地有采取有效措施,进一步推进大数据在突发公共安全事件应急指挥中的运用。

关键词：大数据背景下突发公共安全事件应急指挥研究

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

当前电信网络诈骗的侦办难题与原因及应对策略

引用

广州市公安管理干部学院学报 2020年第3期30卷 37-43页

作者：蔡佩玉广州市公安局警察训练部

近年来电信网络诈骗呈现出专业化、公司化、智能化、精准化等特点,公安机关在侦办电信网络诈骗犯罪案件时面临着发现难、取证难、缉捕难、追赃难等侦办难题,针对这些侦办难题,公安机关应直面困难,分析原因,思考对策,积极应对。

关键词：电信网络诈骗侦办难题与原因应对策略

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

Shor's algorithm does not factor large integers in the presence of noise

引用

Science China(Information Sciences) 2024年第7期67卷 305-320页

作者： Jin-Yi cai College of Letters and Science University of Wisconsin

We consider Shor's quantum factoring algorithm in the setting of noisy quantum gates. Under a generic model of random noise for(controlled) rotation gates, we prove that the algorithm does not factor integers of the form pq when the noise exceeds a vanishingly small level in terms of n—the number of bits of the integer to be factored, where p and q are from a well-defined set of primes of positive density. We further prove that with probability 1-o(1) over random prime pairs(p, q), Shor's factoring algorithm does not factor numbers of the form pq, with the same level of random noise present.

关键词： random noise Shor's algorithm rotation gates quantum computing prime factorization

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

以人民为中心引领下法治公安建设若干问题研究

引用

广州市公安管理干部学院学报 2023年第1期33卷 3-9页

作者：蔡佩玉广州市公安局警察训练部训练二处

以人民为中心是习近平法治思想的根本立场,当前的法治公安建设必须坚持以习近平法治思想为指导,精确把握当前法治公安建设的核心要义和重点内容,认清当前法治公安建设的主要障碍,坚持问题导向,有针对性地采取相应措施。

关键词：以人民为中心法治公安建设

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

台湾高校招生考试制度对大陆新高考改革的启示

引用

教育与考试 2019年第1期 17-23页

作者：蔡培瑜厦门华厦学院应用语言系厦门华厦学院高等教育研究所

多元制度混合模式是台湾现行高校招生考试制度的本质特征。通过推荐入学制、申请入学制、考试入学制等招考方式的有机组合,既可以提供多元入学管道,给学生多样选择和多次选择的机会,也可以让大学依办学特色及发展需求自主选才,并兼顾平... 详细信息

多元制度混合模式是台湾现行高校招生考试制度的本质特征。通过推荐入学制、申请入学制、考试入学制等招考方式的有机组合,既可以提供多元入学管道,给学生多样选择和多次选择的机会,也可以让大学依办学特色及发展需求自主选才,并兼顾平衡城乡教育差异等目的,尽量满足多重政策目标。台湾高校招生考试制度的形成过程及其多元制度混合模式,可为我国大陆各省市新高考改革方案的调整完善带来一些有益启示。

关键词：台湾高校招生考试制度多元制度混合模式新高考改革

来源：

维普期刊数据库

同方期刊数据库评论