检索结果-南通市图书馆

短指软珊瑚(Sinularia acuta)热休克蛋白HSP70家族特征及进化分析

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

热带海洋学报 2024年第4期43卷 123-136页

作者：李子若罗晏杰曹政 chin yaoxian 王沛政海南热带海洋学院崖州湾创新研究院海南三亚572022 海南南沙珊瑚礁生态系统国家野外科学观测研究站广东广州510300 海南热带海洋学院生态环境学院海南三亚572022 三亚海昌梦幻海洋不夜城海南三亚572022 海南省现代化海洋牧场工程研究中心海南三亚572022 海南省近岸海洋生态环境过程与碳汇重点实验室海南三亚572022

热休克蛋白70(heat shock protein 70, HSP70)在生物细胞或组织免受热或氧化应激等方面起着关键作用,是已知高度保守的蛋白质之一。由于全球环境持续升温,珊瑚大面积白化、死亡,珊瑚如何应对持续升温的抗逆机制是科学研究热点。本研究... 详细信息

热休克蛋白70(heat shock protein 70, HSP70)在生物细胞或组织免受热或氧化应激等方面起着关键作用,是已知高度保守的蛋白质之一。由于全球环境持续升温,珊瑚大面积白化、死亡,珊瑚如何应对持续升温的抗逆机制是科学研究热点。本研究从高温胁迫短指软珊瑚测序蛋白序列数据库分析鉴定出了28个HSP70蛋白家族成员,均为酸性亲水蛋白,大部分蛋白质结构较为稳定。亚细胞定位表明HSP70蛋白主要分布在珊瑚细胞核、细胞质中,在线粒体、内质网上也有少量分布。信号肽预测表明, 28个HSP70蛋白成员中26个没有信号肽,大部分不属于分泌蛋白,不存在跨膜结构。系统进化树结果表明短指软珊瑚HSP70蛋白家族成员聚成5大类。短指软珊瑚HSP70蛋白家族结构和保守基序分析中预测到了10条保守基序motif分为5个亚族。短指软珊瑚HSP70蛋白家族二级结构主要以α-螺旋和无规则卷曲为主,α-螺旋的含量占比大。28个HSP70家族蛋白中有25个预测到了N-糖基化位点,且位点个数在1~9范围内。28个HSP70家族蛋白均预测到磷酸化位点和O-糖基化位点,总个数分别在41~96和1~23范围内。本研究HSP70家族蛋白结果为今后珊瑚在应对全球升温胁迫中的适应机制等方面研究奠定了基础。

关键词：短指软珊瑚热休克蛋白 HSP70家族进化

维普期刊数据库博看期刊

Biogeochemistry of sedimentary organic matter in the Yongjiang River estuary in the southern part of Hangzhou Bay,china,since the Late Pleistocene

在线全文

学校读者我要写书评

暂无评论

Journal of Oceanology and Limnology 2024年第3期42卷 772-786页

作者： Dongqin HUAng Xiaolong LI Zilong LI Pei Sun LOH Jianxiong HU Jianfang CHEN Yuan-Pin CHAng chin-Wen YAng Qin GAO Institute of Marine Geology and Resources Ocean CollegeZhejiang UniversityZhoushan 316021China Ministry of Water Resources of the People’s Republic of china Beijing 100054China Key Laboratory of Marine Ecosystem Dynamics Second Institute of OceanographyMinistry of Natural ResourcesHangzhou 310012China Department of Oceanography Sun Yat-sen UniversityKaohsiung 80424China

A sediment core(YJK19-02)collected from the southern outlet of Hangzhou Bay near the Yongjiang River estuary in East china was analyzed for grain size,lignin,bulk elemental composition,stable carbon isotope,and rare earth elements(REEs)to determine the sources and diagenesis of sedimentary organic matter(OM)of the estuary and adjacent areas since the Late Pleistocene.δ^(13)C values(-24.80‰–-23.60‰),total organic carbon/total nitrogen(TOC/TN)molar ratios(8.00–12.14),and light rare earth element/heavy rare earth element ratios(LREE/HREE=8.34–8.91)revealed the predominance of terrestrial sources of OM,mainly from the Changjiang(Yangtze)*** lignin parameters of syringyl/vanillyl(S/V=0.20–0.73)and cinnamyl/vanillyl(C/V=0.03–0.19)ratios indicate the predominance of nonwoody angiosperms,and the vanillic acid/vanillin ratios[(Ad/Al)_(V)=0.32–1.57]indicate medium to high degrees of lignin *** increasing trend ofΛ(total lignin in mg/100-mg OC)values from ca.14500 a BP to ca.11000 a BP reflected the increase in temperature during the Late ***,a time lag effect of temperature on vegetation abundance was also *** relatively higher and stableΛvalues correspond to the higher temperature during the mid-Holocene from ca.8500 a BP to ca.4500 a BP.Λvalues decreased from ca.4000 a BP to the present,corresponding to historical temperature fluctuations during this *** results show that the vegetation abundance in the Yongjiang River Basin since the Late Pleistocene was related to the temperature fluctuation duo to climate change.

关键词： Yongjiang River estuary sedimentary organic matter lignin environmental change Late Pleistocene

维普期刊数据库

Core level excitation spectra of La and Mn ions in LaMnO3

在线全文

学校读者我要写书评

暂无评论

chinese Physics B 2024年第3期33卷 327-332页

作者：李福建程新路张红 Institute of Atomic and Molecular Physics Sichuan UniversityChengdu 610065Chin

Manganese-based perovskite is popular for research on ferromagnetic materials,and its spectroscopic studies are essential for understanding its electronic structure,dielectric,electrical,and magnetic *** this paper,the M-edge spectra of La ions and the M-edge,L-edge,and K-edge spectra of Mn ions in LaMnO3 are calculated by considering both the free-ion multiplet calculation and the crystal field *** analyze spectral shapes,identify peak origins,and estimate the oxidation states of La and Mn ions in LaMnO3 *** is concluded that La ions in LaMnO3 predominantly exist in the trivalent state,while Mn ions exist primarily in the trivalent state with a minor presence of tetravalent ***,the calculated spectra are in better conformity with the experimental spectra when the proportion of Mn3+is 90%and Mn4+is 10%.This article enhances our comprehension of the oxidation states of La and Mn within the crystal and also provides a valuable guidance for spectroscopic investigations of other manganates.

关键词： lanthanum manganate the core level excitation spectra free-ion multiplet calculation oxidation state

维普期刊数据库

光胁迫下一种短指软珊瑚（Sinularia sp.）的白化响应研究

在线全文

学校读者我要写书评

暂无评论

应用海洋学学报 2024年

作者：朱乐沈贝祺曹政齐钊 chin Yaoxian 王沛政海南热带海洋学院崖州湾创新研究院海南热带海洋学院海南南沙珊瑚礁生态系统国家野外科学观测研究站三亚海昌梦幻海洋不夜城海南大学

软珊瑚是海洋中最普遍的低等无脊椎动物之一，是海洋天然产物及海洋药物研究的热点生物种类。但软珊瑚与造礁石珊瑚均会因环境胁迫以及病害发生白化，目前珊瑚白化研究几乎都以造礁石珊瑚为研究对象，而对软珊瑚的研究极少。本研究通过... 详细信息

软珊瑚是海洋中最普遍的低等无脊椎动物之一，是海洋天然产物及海洋药物研究的热点生物种类。但软珊瑚与造礁石珊瑚均会因环境胁迫以及病害发生白化，目前珊瑚白化研究几乎都以造礁石珊瑚为研究对象，而对软珊瑚的研究极少。本研究通过对比不同白化状态下短指软珊瑚（Sinularia sp.）的虫黄藻密度及多样性、共生细菌多样性、转录组表达等差异，初步研究了短指软珊瑚的白化适应机制。结果表明，短指软珊瑚遮光处理20天左右开始颜色变淡，30天左右完全白化，并无死亡，表现出一定的环境适应性。其白化状态的虫黄藻密度较对照组减少约98.69%，而半白化短指软珊瑚则减少约95.40%，虫黄藻密度下降会导致短指软珊瑚能量获取能力下降，从而会对短指软珊瑚各种生理功能产生影响。与正常短指软珊瑚相比，白化和半白化短指软珊瑚的虫黄藻α多样性和丰度均降低。短指软珊瑚白化后细菌α多样性变低，属于γ-变形菌纲的Endozoicomonas成为短指软珊瑚共生细菌群落中的优势物种。对比不同白化状态下短指软珊瑚转录组数据，发现短指软珊瑚在白化过程中差异表达上调基因数目增加，而差异表达下调基因数目减少。代谢通路基因分析显示，白化后其蛋白消化与吸收相关的基因表达持续上升，而碳水化合物消化与吸收相关的基因表达显著下降，这些变化可能与白化珊瑚异养营养方式有关。以上结果初步阐述了光照胁迫下短指软珊瑚白化适应性机制，可为今后进一步探索软珊瑚白化适应性机制提供借鉴。

关键词：白化生理差异转录组软珊瑚虫黄藻共生细菌群落多样性

Electrical performance and reliability analysis of vertical gallium nitride Schottky barrier diodes with dual-ion implanted edge termination

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chip 2024年第3期3卷 36-42页

作者： Bo Li Jinpei Lin Linfei Gao Zhengweng Ma Huakai Yang Zhihao Wu Hsien-chin Chiu Hao-Chung Kuo Chunfu Zhang Zhihong Liu Shuangwu Huang Wei He Xinke Liu College of Materials Science and Engineering College of Electronics and Information EngineeringInstitute of Microelectronics(IME)Guangdong Research Center for Interfacial Engineering of Functional MaterialsState Key Laboratory of Radio Frequency Heterogeneous IntegrationShenzhen UniversityShenzhen 518060China Department of Electronic Engineering Chang Gung UniversityTaoyuan 333TaiwanChina Department of Photonics and the Institute of Electro-Optical Engineering and with Foxconn Semiconductor Research InstituteNational Chiao Tung UniversityHsinchu 300TaiwanChina Xidian University School of MicroelectronicsXi’an710071China

In this study,a galliumnitride(GaN)substrate and its 15μmepitaxial layer were entirely grown by adopting the hydride vapor phase epitaxy(HVPE)*** enhance the breakdown voltage(VBR)of vertical GaN-on-GaN Schottky barrier diodes(SBDs),a dual ion coimplantation of carbon and heliumwas employed to create the edge *** resulting devices exhibited a low turn-on voltage of 0.55 V,a high Ion/Ioff ratio of approximately 109,and a lowspecific onresistance of 1.93 mU cm^(2).When the ion implantation edge was terminated,the maximumVBR of the devices reached 1575 V,with an average improvement of 126%.These devices demonstrated a high figure of merit(FOM)of 1.28 GW cm^(-2) and showed excellent reliability during pulse stress testing.

关键词： Vertical GaN SBD HVPE Dual ion co-implantation Leakage mechanism Device reliability

Outcomes of a non-randomised audit of single pigtail suture stents in urolithiasis management of Asian patients in Singapore

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian Journal of Urology 2024年第2期11卷 324-330页

作者： Ee Jean Lim Zhen Wei Choo Reshma Mangat Pradeep Durai Sarvajit Biligere Yiquan Tan Loh Hin Yeung Marcus Nicole Andrea Seet Li Ting chin Tiong Heng Stefania Ferreti Vineet Gauhar Urology Department Singapore General HospitalSingapore Urology Department Tan Tock Seng HospitalSingapore Urology Department Ng Teng Fong HospitalSingapore Urology Department Azienda Ospedaliera-Uiversitaria(Hospital and University of Parma)ParmaItaly

Objective:Double-J(DJ)ureteric stents are commonly placed perioperatively for semirigid or flexible ureteroscopic renal *** is believed that lesser stent material within the bladder mitigates stent-related *** study aimed to evaluate the J-Fil ureteral stent,a single pigtail suture stent compared with conventional DJ stent in relation to stent symptoms in an Asian population undergoing ureterorenal ***:Based on internal audit committee recommendation approval,the records of 50 patients retrieved,available data of 41 patients who were prospectively enrolled into two groups(Group 1[J-Fil stent group],n=21 and Group 2[DJ stent group],n=20)between August 2020 to January 2021,were *** compared were nature of procedure,stone location and size,ease of deployment or removal,and complications.A modified universal stent symptom questionnaire was used to assess morbidity of stent symptoms within 48 h of insertion and at ***:Both groups had similar median age,distribution in male to female ratio,and stone *** overall median universal stent symptom questionnaire score at insertion was similar for bladder pain,flank or loin pain,and quality of life between Group 1 and 2;however,at removal Group 1 fared significantly better than Group 2,especially for flank or loin pain and pain at *** groups had similar ease in insertion with no hospital ***:Our audit favoured the single pigtail suture stent in Asian ureters in mitigating stent-related *** showed a good safety profile with easy deployment and *** promises a new standard in stenting.

关键词： Stent Ureteroscopy Pigtail suture stent Asianpatient Flexible ureteroscopic renal surgery

Recent advances in Ir/Ru-based perovskite electrocatalysts for oxygen evolution reaction

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2024年第7期43卷 2891-2912页

作者： Zhi-Qi Jiang Cheng-Zhen Fan Jun-Yu Pan Li Shao Hao Chen Erum Pervaiz Yan Dong Tong-Zhou Wang Xue-Rong Zheng Ji-hong Li Yi-Da Deng School of Materials Science and Engineering Hainan UniversityHaikou570228Chin Department of Chemical Engineering School of Chemical and Materials Engineering(SCME)National University of Sciences&Technology(NUST)Islamabad 44000Pakistan Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Nankai UniversityTianjin 300071Chin

Oxygen evolution reaction(OER)is a kinetically harsh four-electron anode reaction that requires a large overpotential to provide current and is of great importance in renewable electrochemical ***/Rubased perovskite oxides hold great significance for application as OER electrocatalysts,due to that their multimetal-oxide forms can reduce the use of noble metals,and their compositional tunability can modulate the electronic structure and optimize OER ***,high operating potentials and corrosive environments pose a serious challenge to the development of durable Ir-based and Ru-based perovskite *** efforts have been dedicated to improving the Ir/Ru-based perovskite activity to enhance the efficiency;however,progress in improving the durability of Ir/Ru-based perovskite electrocatalysts has been rather *** this review,the recent research progress of Ir/Ru-based perovskites is reviewed from the perspective of heteroatom doping,structural modulation,and formation of *** dissolution mechanism studies of Ir/Ru and experimental attempts to improve the durability of Ir/Ru-based perovskite electrocatalysts are *** and outlooks for further developing Ru-and Irbased perovskite oxygen electrocatalysts are also presented.

关键词： Oxygen evolution reaction Ir/Ru-based perovskites Stability Electrocatalysts

维普期刊数据库

Simple bone cysts of the proximal humerus presented with limb length discrepancy:A case report

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2024年第6期12卷 1130-1137页

作者： Cing Syue Lin Shang Ming Lin Syang-Peng Rwei chin-Wen Chen Tsung-Yu Lan Department of Orthopedic Surgery Far Eastern Memorial HospitalNew Taipei City 220Taiwan Department of Materials and Textiles Asia Eastern University of Science and TechnologyNew Taipei City 220Taiwan Institute of Organic and Polymeric Materials National Taipei University of TechnologyTaipei City 10608Taiwan

BACKGROUND Simple bone cysts(SBC)are benign tumor-like bone lesions typically identified in *** SBC may lead to growth disturbances or growth arrest,such cases are *** mechanisms behind these observations remain ***,research on the etiology of SBC remains inconclusive,and there has been no consensus on the appropriate timing and methodology for *** SUMMARY Here,we present our experience in the successful surgical management of a 10-year-old girl with SBC,who presented with a pathological fracture complicated by malunion of the displaced fracture,varus deformity,and limb length *** hypothesized two possible etiologies for the patient’s growth arrest and subsequent humerus varus deformity:(1)Direct disruption of the physis by fluid from the cyst itself;and(2)damage to the epiphysis due to repetitive pathological fractures associated with *** addressing this case,surgical intervention was undertaken to correct the proximal humerus varus *** approach offered the advantages of simultaneously correcting angular abnormalities,achieving mild limb lengthening,providing definitive SBC treatment,and reducing the overall treatment *** As per current literature,acute correction of acute angular deformity in proximal humeral SBC is not well ***,in this specific case,acute correction was considered an optimal solution.

关键词： Bone cyst Solitary cysts Benign Humerus Growth arrest Limb length discrepancy Case report

Designing a Secure and Scalable Data Sharing Mechanism Using Decentralized Identifiers(DID)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & Sciences 2024年第10期141卷 809-822页

作者： Iuon-Chang Lin I-Ling Yeh ching-Chun Chang Jui-Chuan Liu chin-Chen Chang Department of Management Information Systems National Chung Hsing UniversityTaichung402TaiwanChina Information and Communication Security Research Center Feng Chia UniversityTaichung407TaiwanChina Department of Information Engineering and Computer Science Feng Chia UniversityTaichung407TaiwanChina

Centralized storage and identity identification methods pose many risks,including hacker attacks,data misuse,and single points of ***,existing centralized identity management methods face interoperability issues and rely on a single identity provider,leaving users without control over their ***,this paper proposes a mechanism for identity identification and data sharing based on decentralized *** scheme utilizes blockchain technology to store the identifiers and data hashed on the chain to ensure permanent identity recognition and data *** is stored on InterPlanetary File System(IPFS)to avoid the risk of single points of failure and to enhance data persistence and *** the same time,compliance with World Wide Web Consortium(W3C)standards for decentralized identifiers and verifiable credentials increases the mechanism’s scalability and interoperability.

关键词： Self-sovereign identity decentralized identifier blockchain