检索结果-南通市图书馆

Molecular Cloning and Expression of Polyphenoloxidase Genes from the Mushroom, Agaricus bisporus

Agricultural Sciences in China 2011年第2期10卷 185-194页

作者： li nan-yi CAI Wei-ming JIN Qun-li QIN Qiao-ping RAN Fu-lai College of Agriculture and Food Science Zhejiang Agricultural and Forestry UniversityHangzhou 311300P.R.China Institute of Horticulture Zhejiang Academy of Agricultural SciencesHangzhou 310021P.R.China Odessa College University of AveOdessa 79764USA

The polyphenoloxidase（PPO） is the key enzyme considered to be responsible for mushroom *** using homology cloning and rapid amplification of cDNA ends（RACE）,two new PPO genes and the corresponding cDNA were identified from the fruit bodies of Agaricus bisporus（AbPPO3 and AbPPO4,GenBank accession ***936494 and GU936493,respectively）.The genomic DNA sequences of AbPPO3 and AbPPO4 are 2 080 and 2 189 bp in length,respectively,encoding putative polypeptides of approximately 66 and 68 *** deduced amino acid sequences show characteristic features of two copper-binding domains conserved in the type III copper proteins including fungal polyphenol *** comparisons indicate that AbPPO3 and AbPPO4 present 55.3% similarity to each other（48% identity）.We also obtained more than 1.5-kb long sequences upstream of the start codon of the AbPPO3 and AbPPO4 and recognized them as their respective putative *** of the two PPO promoter regions show that they contain abundant cis-acting elements which are probably responsible for anaerobic induction,light,wound,stress,and auxin ***-quantitative RT-PCR results indicate that AbPPO3 and AbPPO4 were highly expressed in the mature fruit bodies and up-regulated after 2-d storage of *** results suggest that AbPPO3 and AbPPO4 may play roles in *** browning and pigmentation during development and postharvest storage and the elements in promoters may act as regulatory elements for the inducible expression of AbPPO3 and *** successful cloning and expression analysis of AbPPO3 and AbPPO4 warrant a further investigation on the structure and function of *** PPO which points to the possible targets for genetic manipulation.

关键词： polyphenoloxidase Agaricus bisporus tyrosinase promoter browning

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

Phylogenetic Analysis of Legionella Strains and Identification of Serogroups by lipopolysaccharide-and O-antigen-based PCR Assay

引用

Biomedical and Environmental Sciences 2021年第6期34卷 483-488页

作者： li yi nan REN Hong Yu ZHAO Na WANG Yan Qing li Dai QIN Tian State Key Laboratory for Infectious Disease Prevention and Control National Institute for Communicable Disease Control and PreventionChinese Center for Disease Control and PreventionBeijing 102249China nanchang Center for Disease Control and Prevention Nanchang 330100JiangxiChina Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases Hangzhou 310021JiangsuChina

Legionella,a genus of pathogenic Gram-negative bacteria,is widely present in natural water sources and artificial water systems.A total of 65 species and>70 serogroups of Legionella have been characterized[1].lipopolysaccharide(LPS),the main component of the outer membrane of Legionella,is not only associated with toxicity,but also provides the basis for classification in serotyping[2].

关键词： Phylogenetic artificial outer

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

Isolation and Characterization of Vagococcus fluvialis from Bats

引用

Biomedical and Environmental Sciences 2021年第10期34卷 834-837页

作者： QIN Tian JIANG Lu Xi REN Hong Yu JIA Xue Yang NIE Xu Dong li yi nan State Key Laboratory for Infectious Disease Prevention and Control Collaborative Innovation Center for Diagnosis and Treatment of Infectious DiseasesNational Institute for Communicable Disease Control and PreventionChinese Center for Disease Control and PreventionBeijing 102206China Department of Respiratory Medicine Zhejiang Provincial People's HospitalPeople's Hospital of Hangzhou Medical CollegeHangzhou 310000ZhejiangChina

The genus Vagococcus was first described by *** initially consisted of a single species,*** species was isolated from chicken feces and river water and first described by Hashimoto et al.[1,2].Teixeira et *** *** from... 详细信息

关键词： initially fluvialis coccus

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

Broadband absorption performance of 3D-printed polyetheretherketone-based electromagnetic wave-absorbing composites

引用

Chinese Journal of Aeronautics 2024年第8期37卷 547-558页

作者： lin BAI nan CHANG Meiying ZHAO Chi HOU yi CAO Dichen li School of Aeronautics Northwestern Polytechnical UniversityXi’an 710072China Chengdu Aircraft Design and Research Institute Chengdu 610091China Xi’an Key Laboratory of Advanced Structure Design and Application of Aircraft Northwestern Polytechnical UniversityXi’an 710072China State Key Laboratory for Manufacturing System Engineering Xi’an Jiaotong UniversityXi’an 710054China

The rapid development of additive manufacturing technology has offered a new avenue for designing and fabricating high wave-absorbing meta *** this study,the mechanical properties and broadband absorption performance of Poly-Ether-Ether-Ketone(PEEK)–based electromagnetic wave–absorbing composite materials was *** high-performance polymer PEEK was used as the matrix,and the materials with electromagnetic wave loss,such as reduced graphene oxide,Carbonyl Iron(CI),and Flake CI(FCI),were used as *** on the theory of impedance matching,a wave-absorbing structure with a gradual impedance gradient was designed and *** test results showed that at the 2.0–18.0 GHz frequency band,the coverage rate of the effective absorption bandwidth was up to 72.0%,the average optimal reflectivity was–18.09 dB,and the wide-angle absorption range was 0°–30°.The advantages of additive manufacturing technology in designing and fabricating wave-absorbing structures are presented,demonstrating that the technology is an effective method for creating broadband absorbing structures.

关键词： Absorption performance Additive manufacturing Electromagnetic absorption PEEK composite materials Gradual structure Broadband absorption

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

有机基板用增层膜性能与一致性的探讨

引用

电子与封装 2024年第2期24卷 26-33页

作者：李会录张国杰魏韦华李轶楠刘卫清杜博垚西安天和嘉膜工业材料有限责任公司西安710119 西安科技大学材料科学与工程学院西安710054 无锡中微高科电子有限公司江苏无锡214061

增层膜是集成电路封装用有机基板的关键材料,起到绝缘、导热和的电气连接的作用。增层膜性能是由树脂体系、固化体系、填料以及膜的半固化处理等因素决定的。从国内外增层膜研究现状以及集成电路封装用有机基板的发展趋势出发,研究影响... 详细信息

增层膜是集成电路封装用有机基板的关键材料,起到绝缘、导热和的电气连接的作用。增层膜性能是由树脂体系、固化体系、填料以及膜的半固化处理等因素决定的。从国内外增层膜研究现状以及集成电路封装用有机基板的发展趋势出发,研究影响增层膜性能一致性的因素,并对增层膜低收缩率、高剥离力、低介电性和热稳定性的发展方向进行了探讨。控制电子级环氧树脂环氧当量、分子量和分子量大小分布等性能可实现膜加工性和性能一致性。环氧基的增层膜是高密度封装有机基板的主流产品,随着介电常数和损耗越来越小的要求,环氧树脂非极性和对称官能团的改性变得越来越重要。

关键词：有机基板增层膜成膜性填料半固化

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

Dispersive Analysis of Excited Glueball States

引用

Chinese Physics Letters 2024年第10期41卷 14-25页

作者： Hsiang-nan li Institute of Physics Academia SinicaTaipei 115

Motivated by the determination for the spin-parity quantum numbers of the X(2370)meson at BESⅢ,we extend our dispersive analysis on hadronic ground states to excited *** idea is to start with the dispersion relation which a correlation function obeys,and subtract the known ground-state contribution from the involved spectral density.

关键词： density. states. BESⅢ

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

The size effect and analogous boundary states in a circular non-Hermitian chain

引用

Communications in Theoretical Physics 2024年第2期76卷 157-165页

作者： Xin-Yu Ma yi-Han Guan Qiao-nan li Ai-Lei He Lu Qi School of Physical Science and Technology Yangzhou UniversityYangzhou 225002China

We investigate the size effect and boundary states based on a circular non-Hermitian chain under the nonreciprocal intra-cell coupling and inter-cell coupling *** find that the circular non-Hermitian chain exhibits an even–odd effect on the unit cell corresponding to a large chain,which is different from the open non-Hermitian chain only exhibiting the same effect for a small ***,we find that the originally localized bulk states become totally extended via designing the boundary coupling strength *** extended bulk states reveal the fact of the disappearance of the non-Hermitian skin *** particular,we show that the circular non-Hermitian chain also possesses the analogous edge states under some parameter regimes,which is pretty counterintuitive since the circular chain usually cannot define a *** investigations supply the different non-Hermitian phenomena in a circular non-Hermitian chain.

关键词： boundary states non-Hermitian chain topological state

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

Data-Driven Direct Adaptive Risk-Sensitive Control of Stochastic Systems

引用

Journal of Systems Science & Complexity 2024年第4期37卷 1446-1469页

作者： QIAO nan li Tao School of Mathematical Sciences East China Normal UniversityShanghai 200241China Shanghai Key Laboratory of Pure Mathematics and Mathematical Practice School of Mathematical SciencesEast China Normal UniversityShanghai 200241China

The authors propose a data-driven direct adaptive control law based on the adaptive dynamic programming(ADP) algorithm for continuous-time stochastic linear systems with partially unknown system dynamics and infinite horizon quadratic risk-sensitive *** authors use online data of the system to iteratively solve the generalized algebraic Riccati equation(GARE) and to learn the optimal control law *** the case with measurable system noises,the authors show that the adaptive control law approximates the optimal control law as time goes *** the case with unmeasurable system noises,the authors use the least-square solution calculated only from the measurable data instead of the real solution of the regression equation to iteratively solve the *** authors also study the influences of the intensity of the system noises,the intensity of the exploration noises,the initial iterative matrix,and the sampling period on the convergence of the ADP ***,the authors present two numerical simulation examples to demonstrate the effectiveness of the proposed algorithms.

关键词： Adaptive dynamic programming direct adaptive control generalized algebraic Riccati equation risk-sensitive control

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

基于代谢组学探究肾阳虚证患者激素代谢的变化研究

引用

云南中医中药杂志 2024年第8期45卷 68-73页

作者：刘峻宇李羿南吴文笛刘兆丰孙敏云南省药物研究所/云南省中药和民族药新药创制企业重点实验室云南昆明650111 云南白药集团股份有限公司云南昆明650500 昆明市中医医院云南昆明650111

目的探究肾阳虚证患者与平和质人群的尿液代谢物水平差异,分析激素变化情况,为肾阳虚证探索出有价值的生物标志物。方法共纳入8例肾阳虚患者与4例平和质人群的尿液进行UPLC代谢组学分析,通过PCA、PLS-DA分析,筛选出有显著差异的代谢物... 详细信息

目的探究肾阳虚证患者与平和质人群的尿液代谢物水平差异,分析激素变化情况,为肾阳虚证探索出有价值的生物标志物。方法共纳入8例肾阳虚患者与4例平和质人群的尿液进行UPLC代谢组学分析,通过PCA、PLS-DA分析,筛选出有显著差异的代谢物并结合代谢通路进行分析。结果与对照组相比较,试验组尿液中11-β-羟基雄酮-3-葡萄糖醛酸、三羟基孕酮、18-羟皮质醇、醛固酮18-葡糖苷酸、4-羟基雄烯二酮葡糖苷酸等激素代谢物显著上升,硫酸雄酮、本胆烷醇酮、16-脱氢黄体酮、5b-孕二醇、氟氢可的松、雌酮、5a-二氢睾酮等显著下降。结论本研究进一步证明了肾阳虚证会导致机体多种激素代谢紊乱,降低氨基酸、脂肪酸等能量代谢,并与细胞内吞、昼夜节律夹带等通路有关。

关键词：肾阳虚证代谢组学代谢通路生物标志物

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

有机封装基板界面处理工艺对结合强度与可靠性的影响

引用

电子与封装 2024年第2期24卷 34-40页

作者：梁梦楠陈志强张国杰姚昕李轶楠张爱兵无锡中微高科电子有限公司江苏无锡214035

封装基板分层是塑封电路常见的一种失效模式,塑封基板分层会导致整个电路出现开路问题。基板分层通常与其界面间结合强度不足、基板水汽等有关。研究了铜表面的粗化处理、味之素堆积膜(ABF)表面的等离子清洁对铜和ABF表面的形貌、粗糙... 详细信息

封装基板分层是塑封电路常见的一种失效模式,塑封基板分层会导致整个电路出现开路问题。基板分层通常与其界面间结合强度不足、基板水汽等有关。研究了铜表面的粗化处理、味之素堆积膜(ABF)表面的等离子清洁对铜和ABF表面的形貌、粗糙度以及界面间结合的影响,粗化后的铜表面与ABF树脂的剥离界面分析结果证明界面间断裂失效属于物理结合力失效。同时还对基板加工过程的吸水率及不同烘烤参数对除水效果的影响进行了研究。通过引入铜面粗化处理、等离子清洁和增层前烘烤,解决了基板封装后出现分层的问题,同时封装后的产品通过了部分热可靠性测试。

关键词：封装基板味之素堆积膜粗化处理等离子清洁封装可靠性

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

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：