检索结果-南通市图书馆

水稻富含半胱氨酸类受体激酶家族基因对纹枯病菌和植物激素的响应特征分析

在线全文

学校读者我要写书评

暂无评论

中国水稻科学 2021年第5期35卷 439-448页

作者：冯志明王广达赵剑华居冉李梦臣高鹏胡珂鸣陈宗祥左示敏扬州大学农学院/江苏省作物基因组学和分子育种重点实验室/植物功能基因组学教育部重点实验室江苏扬州225009 扬州大学江苏省粮食作物现代产业技术协同创新中心/江苏省作物遗传生理重点实验室江苏扬州225009

【目的】明确水稻富含半胱氨酸类受体激酶(Cysteine-rich receptor-like kinases,CRK)家族基因对纹枯病菌侵染和植物激素的响应特征,是解析CRK在水稻纹枯病抗性中的功能的重要前期工作。【方法】利用生物信息学方法构建了水稻45个CRK的... 详细信息

【目的】明确水稻富含半胱氨酸类受体激酶(Cysteine-rich receptor-like kinases,CRK)家族基因对纹枯病菌侵染和植物激素的响应特征,是解析CRK在水稻纹枯病抗性中的功能的重要前期工作。【方法】利用生物信息学方法构建了水稻45个CRK的系统发育树,并利用qPCR分析了它们对纹枯病菌和对植物激素乙烯(Ethylene,ET)、茉莉酸(Jasmonic acid,JA)、水杨酸(Salicylic acid,SA)和细胞分裂素(Cytokinin,CK)等的响应特征,以及在水稻不同组织中的表达模式。【结果】水稻CRK家族可分为4个组,在染色体上成簇或紧密分布的CRK大部分来自同一组或同一分支。41个CRK响应纹枯病菌侵染,其中17个响应强烈;结合组织表达模式,发现这17个CRK基因中,CRK15、CRK23、CRK24、CRK26、CRK27、CRK28、CRK29、CRK30、CRK31和CRK33等10个基因在叶鞘和叶片中表达较强,暗示这些基因可能参与了对纹枯病的抗性;大部分同一分支的两个同源性较高的CRK对纹枯病菌的响应特征类似,表明这些CRK基因在调控纹枯病抗性上可能存在功能冗余。40个CRK对3种或4种植物激素均有响应,它们对不同激素的响应存在差异性,说明CRK可能广泛参与这些激素介导的防御信号途径;对JA和SA响应相反的有17个,对JA和SA、ET和JA、ET和SA响应类似的分别有21、21、23个。这不仅反映了ET、JA、SA信号途径间的协同和拮抗作用,也说明这些基因可能参与ET、JA和SA间的交互作用。【结论】鉴定到一些可能参与调控水稻纹枯病抗性的CRK基因,且它们可能在植物激素介导的防御途径中起作用。这为我们进一步探索CRK在调控水稻纹枯病抗性上的功能提供了科学线索。

关键词：水稻 OsCRK基因纹枯病防御相关激素响应特征

在线全文

学校读者我要写书评

暂无评论

膝单间室骨性关节炎与骨质疏松症的关联分析

国际生物医学工程杂志 2020年第3期43卷 226-230,243页

作者：蔄元鹏李桂石王光达姜涛涛王金伟黄晨烟台市烟台山医院骨科 264001 烟台毓璜顶医院骨关节外科 264000

目的研究膝单间室骨性关节炎(KOA)与骨质疏松症(OP)的关联性。方法选择年龄为50~80岁、体质量指数(BMI)为16.5~38的KOA患者118例为KOA组,其中排除继发性因素导致的合并OP患者。选择年龄与KOA组患者相匹配的未患KOA者42例。采集两组患者... 详细信息

目的研究膝单间室骨性关节炎(KOA)与骨质疏松症(OP)的关联性。方法选择年龄为50~80岁、体质量指数(BMI)为16.5~38的KOA患者118例为KOA组,其中排除继发性因素导致的合并OP患者。选择年龄与KOA组患者相匹配的未患KOA者42例。采集两组患者的年龄、BMI、骨密度(BMD)等数据。进行KOA和OP的关联分析,确定其关联程度,以揭示KOA发病、进展、预后与OP的关系。结果BMD与BMI具有相关性,BMD与年龄呈负相关,KOA和OP的发病率均与年龄存在相关性。KOA与OP存在较大关联性,且关联系数较大,KOA伴发OP的概率很高。对于KOA患者,其BMI较高时伴OP的可能性小,而BMI较低时伴发OP的可能性增加。结论OP为KOA的致病因素之一,临床中对KOA患者,在前术后都要进行抗OP治疗。

关键词：膝单间室骨性关节炎骨质疏松环境致病因素

A Review on Ultrasonic-Assisted Forming:Mechanism,Model,and Process

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2021年第5期34卷 147-170页

作者： guangda Shao Hongwei Li Mei Zhan Shaanxi Key Laboratory of Precision Forming Technology and Equipment School of Materials Science and Engineering Northwestern Polytechnical University Xi’an 710072 China

Compared with conventional forming processes,ultrasonic-assisted forming technology with a high frequency and small amplitude can significantly improve the forming quality of *** to the advantages of reduced forming force,improved surface quality,avoidance of forming defects,and strengthened surface structure,ultrasonic-assisted forming technology has been applied to increasingly advanced forming processes,such as incremental forming,spinning,and ***,in the ultrasonic-assisted forming process,there are multiple ultrasonic mechanisms,such as the volume effect and surface *** explanation of the effect of ultrasonic vibration(UV)on plastic deformation remains controversial,hindering the development of related ***,many researchers have proposed many new theories and technologies for ultrasonic-assisted *** summarize these developments,systematic discussions on mechanisms,theoretical models,and forming performances are provided in this *** this basis,the limitations of the current study are *** addition,an outlook for ultrasonic-assisted forming is proposed:efficient and stable UV systems,difficulty forming components with complex geometry,explanation of the in-depth mechanism,a systematic theoretical prediction model,and multi-field-coupling energy-assisted forming are considered to be hot spots in future *** present review enhances existing knowledge of ultrasonic-assisted forming,and facilitates a fast reference for related researchers.

关键词： Ultrasonic vibration Forming Mechanism Model Processing performance

在线全文

学校读者我要写书评

暂无评论

光合细菌对大豆的根瘤及产量的影响

大豆科技 2016年第5期 9-13页

作者：丁洪玲张庆宇黄初女王光达王亮李永一延边州农业科学院吉林龙井133400

以高油大豆品种吉育202和普通大豆品种延11为试验材料,探讨在各生育期光合细菌处理对大豆的农艺性状、根瘤、脂肪以及产量的影响。结果表明:1)处理3的根长、根瘤数、根干重在始花期差异显著,处理6的农艺性状除始花期外整个生育期差异最... 详细信息

以高油大豆品种吉育202和普通大豆品种延11为试验材料,探讨在各生育期光合细菌处理对大豆的农艺性状、根瘤、脂肪以及产量的影响。结果表明:1)处理3的根长、根瘤数、根干重在始花期差异显著,处理6的农艺性状除始花期外整个生育期差异最明显;2)光合细菌含量的增加,大豆的产量和脂肪含量明显提高。

关键词：大豆根瘤脂肪产量

Induction of jasmonic acid biosynthetic genes inhibits Arabidopsis growth in response to low boron

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Plant Biology 2021年第5期63卷 937-948页

作者： Yupu Huang Sheliang wang Chuang wang guangda Ding Hongmei Cai Lei Shi Fangsen Xu National Key Laboratory of Crop Genetic Improvement Huazhong Agricultural UniversityWuhan 430070China Microelement Research Center College of Resources&EnvironmentHuazhong Agricultural UniversityWuhan 430070China

The essential micronutrient boron(B) has key roles in cell wall integrity and B deficiency inhibits plant growth. The role of jasmonic acid(JA) in plant growth inhibition under B deficiency remains unclear. Here,we report that low B elevates JA biosynthesis in Arabidopsis thaliana by inducing the expression of JA biosynthesis genes. Treatment with JA inhibited plant growth and, a JA biosynthesis inhibitor enhanced plant growth, indicating that the JA induced by B deficiency affects plant growth. Furthermore,examination of the JA signaling mutants jasmonate resistant1, coronatine insensitive1-2, and myc2 showed that JA signaling negatively regulates plant growth under B deficiency. We identified a low-B responsive transcription factor, ERF018, and used yeast one-hybrid assays and transient activation assays in Nicotiana benthamiana leaf cells to demonstrate that ERF018 activates the expression of JA biosynthesis genes. ERF018 overexpression(OE)lines displayed stunted growth and up-regulation of JA biosynthesis genes under normal B conditions,compared to Col-0 and the difference between ERF018 OE lines and Col-0 diminished under low *** results suggest that ERF018 enhances JA biosynthesis and thus negatively regulates plant growth. Taken together, our results highlight the importance of JA in the effect of low B on plant growth.

关键词： Arabidopsis thaliana ERF018 low B jasmonic acid biosynthesis jasmonic acid signaling plant growth

Degradable Protein-loaded Polymer Capsules Fabricated by Thiol-disulfide Cross-linking Reaction at Liquid-liquid Interface

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2019年第8期37卷 790-796页

作者： Xiaoteng Ma guangda Han Hanying Zhao Key Laboratory of Functional Polymer Materials Ministry of Education College of Chemistry Nankai University Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)

In these years, the encapsulation of proteins for protection and delivery purpose has attracted great interest. In this research,W/O emulsion droplets were used as soft templates and bovine serum albumin(BSA) encapsulated hollow capsules were prepared by liquid-liquid interfacial thiol-disulfide exchange reaction. Block copolymer chains with pendant pyridyl disulfide groups are located at liquid-liquid interface, and upon addition of a macromolecular crosslinking agent with multiple pendant thiol groups into an emulsion,thiol-disulfide interfacial crosslinking reactions lead to the formation of BSA encapsulated hollow capsules. The cleavage of disulfides on the membranes results in the degradation of hollow structures and the release of encapsulated protein molecules. Transmission electron microscopy, scanning electron microscopy, atomic force microscopy, and confocal laser scanning microscopy were employed to characterize the hollow capsules. In comparison with native BSA, BSA molecules encapsulated in the hollow structures show higher catalytic efficiency due to higher local concentration of reactants in the structures. The membranes of the hollow capsules can efficiently protect the encapsulated BSA from hydrolysis by trypsin.

关键词： Polymer capsules BSA Interfacial thiol-disulfide reaction

Nd-doped structurally disordered YSr_(3)(PO_(4))_(3) single crystal:Growth and laser performances

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2021年第12期39卷 1540-1546,I0004页

作者： guangda Wu Xiaoqin Yin Mengdi Fan Fapeng Yu Shuzhen Fan Zhengping wang Xian Zhao State Key Laboratory of Crystal Materials Institute of Crystal MaterialsShandong UniversityJinan 250100China Center for Optics Research and Engineering Key Laboratory of Laser&Infrared System(Shandong University)Ministry of EducationQingdao 266200China

Disordered-structure crystals have drawn increasing attention as promising ultrashort laser material hosts owing to their broad ***,a novel disordered Nd:YSr_(3)(PO_(4))_(3)(Nd:YSP)crystal with good quality was successfully grown via the Czochralski pulling *** absorption and fluorescence spectra of the Nd:YSP single crystal were recorded at ambient *** maximum absorption cross section for Nd:YSP single crystal is found to be approximately 3.89×10^(-20) cm^(2).The stimulated emission cross section for Nd:YSP crystal at~1060 nm was determined to be 7.64×10^(20) cm^(2) with the full width half maximum value of 22 *** fluorescence lifetime of the Nd3+ions in the Nd:YSP crystal is fitted to be 288μ***-pumped continuous-wave laser operation is firstly realized at approximately 1060 *** maximum output power value from the Nd:YSP crystal is 714 mW,corresponding to a slope efficiency of-12.8%.The results indicate that the Nd:YSP crystal with a disordered structure may be a promising disordered laser host.

关键词： Crystal growth Thermal behavior Spectral property Laser performance Rare earths

在线全文

学校读者我要写书评

暂无评论

如何提升电热毯企业产品检验能力水平

市场监管与质量技术研究 2023年第3期 23-25页

作者：彭春兰井长胜王光大熊茜刘宝京辽宁省国家新型原材料基地建设工程中心辽宁沈阳110032

为保障电热毯产品质量,需对生产过程关键环节的关键指标进行检验。但有些企业由于检验能力及水平不足,无法提供可靠的检验结果。文中通过分析目前企业产品检验能力现状和存在的主要问题,提出强化企业检验能力措施,帮助企业提高检验能力... 详细信息

为保障电热毯产品质量,需对生产过程关键环节的关键指标进行检验。但有些企业由于检验能力及水平不足,无法提供可靠的检验结果。文中通过分析目前企业产品检验能力现状和存在的主要问题,提出强化企业检验能力措施,帮助企业提高检验能力和水平,提升进入流通领域的产品安全可靠性。

关键词：电热毯检验能力水平提升措施

在线全文

学校读者我要写书评

暂无评论

球形钨粉的制备及粉末特性研究

中国钨业 2019年第2期34卷 43-49页

作者：张莹莹刘国辉周武平熊宁王广达安泰天龙钨钼科技有限公司北京100094 安泰科技股份有限公司北京100081 北京市难熔金属材料工程技术研究中心北京100094

以团聚严重、不规则形状的还原钨粉为原料,经过球磨处理后,采用射频等离子体球化技术制备球形钨粉。在射频等离子体球化过程中,研究原料粉末形态对球化结果的影响。采用扫描电子显微镜、激光粒度分析仪和BT-100粉体综合特性测试仪对球... 详细信息

以团聚严重、不规则形状的还原钨粉为原料,经过球磨处理后,采用射频等离子体球化技术制备球形钨粉。在射频等离子体球化过程中,研究原料粉末形态对球化结果的影响。采用扫描电子显微镜、激光粒度分析仪和BT-100粉体综合特性测试仪对球磨和球化处理前后粉末的形貌、粒度、松装密度和振实密度进行测试和分析。结果表明:球磨处理后,钨粉颗粒分散状态良好,粒径明显降低,粒度分布明显变窄;经过球化处理后,钨粉颗粒呈规则球形,表面光滑,松装密度和振实密度得到明显提高。

关键词：球磨射频等离子体球形钨粉粉末形貌