检索结果-南通市图书馆

Rare Metals 2021年第10期40卷 2964-2974页

作者： Zhen-Yi Wei Kang-Ming Hu Bai-Sheng sa Bo Wu Multiscale Computa.ional Materials Fa.ility School of Materials Science and EngineeringFuzhou UniversityFuzhou 350100China

Effects of pressure on lattice parameters, electronic, thermodyna.ic and mecha.ical properties of the fully ordered Ti_(2)AlNb orthorhombic phase were studied using first-principles calcula.ions based on density functional theory(DFT). The bonding nature for ordering orthorhombic Ti_(2)AlNb was revealed quantita.ively through the electronic structure analyzing. The external pressures play limited roles in the elastic a.isotropy of the alloy due to the outstanding dyna.ical and mecha.ical sta.ilities under pressure. However, the shear modulus of O phase ma.ifests a.isotropic, where {010} shear planes are the ea.iest planes to cleave among the principal planes under all *** heat capa.ities, volume expansions and thermal expansion coefficients were calculated using the qua.i-harmonic approxima.ion model based on the phonon dispersion curves. Meanwhile, the bulk modulus, Young’s modulus,shear modulus and the hardness are promptly enhanced under pressure. The predicted results give hints to design Ti_(2)AlNb-based alloy as high-pressure applica.ions.

关键词： Ti2AlNb-based orthorhombic phase Pressure-induced effect Thermodyna.ic properties Mecha.ical properties First-principles calcula.ions

Computa.ional Prediction of Micro RNAs from Toxoplasma gondii Potentially Regula.ing the Hosts' Gene Expression

在线全文

学校读者我要写书评

暂无评论

Genomics, Proteomics & Bioinforma.ics 2014年第5期12卷 228-238页

作者： Müs?erref Duygu sa.a. Caner Bagc? Jens Allmer Molecular Biology and Genetics Izmir Institute of Technology Urla Izmir 35430 Turkey Biotechnology Izmir Institute of Technology Urla Izmir 35430 Turkey Bionia.incorporated IZTEKGEB A8 Urla Izmir 35430 Turkey

MicroRNAs （miRNAs） were discovered two decades ago, yet there is still a great need for further studies elucida.ing their genesis and targeting in different phyla. Since experimental discovery and va.ida.ion of miRNAs is difficult, computa.ional predictions are indispensable and today most computa.ional approaches employ machine learning. Toxoplasma gondii, a para.ite residing within the cells of its hosts like human, uses miRNAs for its post-transcriptional gene reg- ula.ion. it may also regulate its hosts＇ gene expression, which has been shown in brain cancer. Since previous studies have shown that overexpressed miRNAs within the host are causal for disease onset, we hypothesized that T. gondii could export miRNAs into its host cell. We computa.ionally predicted all hairpins from the genome of T. gondii and used mouse and human models to filter possible candidates. These were then further compared to known miRNAs in human and rodents and their expression was exa.ined for T. gondii grown in mouse and human hosts, respectively. We found that among the millions of potential hairpins in T. gondii, only a few thousand pass filtering using a human or mouse model and that even fewer of those are expressed. Since they are expressed and differentially expressed in rodents and human, we suggest that there is a chance that T. gondii may export miRNAs into its hosts for direct regula.ion.

关键词： Toxoplasma gondii MicroRNA Regula.ion Host interaction Para.ite

在线全文

学校读者我要写书评

暂无评论

添加糖与儿童心血管病风险的关系

中华高血压杂志 2016年第10期24卷 937-937页

作者：刘莉叶鹏 Vos MB Kaar JL Welsh ja Van Horn LV Feig Di Anderson CA Patel MJ Cruz Munos J Krebs NF Xanthakos sa Johnson RK American Heart Associa.ion Nutrition Committee of the Council on Lifestyle and Cardiometabolic Health Council on Clinical Cardiology Council on Cardiovascular Disease in the Young Council on Cardiovascular and Stroke Nurs-ing Council on Epidemiology and Prevention Council on Func-tional Genomics and Transla.ional Biology Council on Hypertension

不良的生活方式行为是导致全球可预防疾病的原因。膳食中添加糖可使其富含能量但营养差,且可增加发展为肥胖、心血管病、高血压、肥胖相关的癌症和龋齿的风险。方法和结果：美国心脏协会对目前的科学证据进行审查和分级,探讨添加糖对儿... 详细信息

不良的生活方式行为是导致全球可预防疾病的原因。膳食中添加糖可使其富含能量但营养差,且可增加发展为肥胖、心血管病、高血压、肥胖相关的癌症和龋齿的风险。方法和结果：美国心脏协会对目前的科学证据进行审查和分级,探讨添加糖对儿童心血管健康的影响。

关键词：心血管病风险儿童糖美国心脏协会心血管健康预防疾病生活方式

indium Tin Oxide Coated D-Shape Fiber as a saturable Absorber for Genera.ing a Dark Pulse Mode-Locked Laser

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2020年第5期37卷 51-54页

作者： B.Nizama.i S.sa.a. A.A.A.jafry N.M.Za.ir N.Jura.i M.i.M.Abdul Khudus A.Shuhaimi E.Hana.i S.W.Harun Photonics Engineering Laboratory Department of Electrical EngineeringUniversity of Malaya50603 Kuala LumpurMalaysia Faculty of informa.ion Technology Imam Ja'afar Al-Sadiq UniversityBaghdadIraq Department of Physics Faculty of ScienceUniversiti Teknologi Malaysia81310 SkudaiJohorMalaysia Department of Physics Faculty of ScienceUniversity of Malaya50603 Kuala LumpurMalaysia Low-Dimensional Materials Research Center Department of PhysicsFaculty of ScienceUniversity of Malaya50603 Kuala LurmpurMalaysia Department of Engineering Faculty of Vocational StudiesAirlangga UniversitySurabayaIndonesia

A dark pulse mode-locked laser is experimentally demonstrated using the indium tin oxide(iTO)coated Dshape fiber as a saturable absorber(sa).Using the polishing wheel technique,a D-shape single mode fiber was fabricated.A 60-nm-thick layer of iTO was deposited over the D-shape fiber using the electron beam deposition *** sa has a satura.ion intensity of 40.32 MW/cm^2 and a modula.ion depth of 3.5%.A stable dark pulse mode-locked laser was observed at a central wavelength of 1559.4 nm with repetition rate 0.98 MHz,pulse width 370 ns and signal-to-noise ra.io 61 dB.

关键词： fiber polishing mode

TM-Zn金属间化合物结构稳定性的第一性原理研究

在线全文

学校读者我要写书评

暂无评论

福州大学学报（自然科学版） 2017年第3期45卷 424-431页

作者：方圆陈祖华萨百晟吴波福州大学材料科学与工程学院福建福州350116

基于能带结构,提出jahn-Teller效应的诱发条件.基于声子色散曲线,揭示晶格动态稳定性和简并振动模式产生劈裂的物理特征.基于电子局域化函数和束缚能,揭示原子成键特性.结果表明,TM-Zn(TM=Ni,Pd,Pt,Cu,Ag,Au)金属间化合物发生立方到四... 详细信息

基于能带结构,提出jahn-Teller效应的诱发条件.基于声子色散曲线,揭示晶格动态稳定性和简并振动模式产生劈裂的物理特征.基于电子局域化函数和束缚能,揭示原子成键特性.结果表明,TM-Zn(TM=Ni,Pd,Pt,Cu,Ag,Au)金属间化合物发生立方到四方的相变变形过程中,结构保持稳定.

关键词： TM-Zn金属间化合物相变变形 jahn-Teller效应结构稳定性第-性原理计算

肺静脉和左心房后部完全隔离治疗慢性房颤的长期临床预后研究

在线全文

学校读者我要写书评

暂无评论

世界核心医学期刊文摘（心脏病学分册） 2007年第12期3卷 41-42页

作者： sanders P. Hocini M. ja■s P. 吴超能 Cardiovascular Research Centre Department of Cardiology Royal Adelaide Hospital Adelaide SA 5000 Australia.Dr

目的:探讨左心房(LA)后部在慢性房颤(AF)中的作用。方法和结果:有27例慢性AF患者入选。在肺静脉隔离后,采用盐水灌注导管施行连接左右肺静脉的消融以实现对LA后部的隔离。LA后部电活动消失、该区域不能被起搏则为成功隔离。根据心动周... 详细信息

目的:探讨左心房(LA)后部在慢性房颤(AF)中的作用。方法和结果:有27例慢性AF患者入选。在肺静脉隔离后,采用盐水灌注导管施行连接左右肺静脉的消融以实现对LA后部的隔离。LA后部电活动消失、该区域不能被起搏则为成功隔离。根据心动周期长度(CL)的改变和AF的终止确定消融效果。

关键词：慢性房颤左心房肺静脉

南海南部sa09-040孔孢粉记录及古气候

在线全文

学校读者我要写书评

暂无评论

海洋学研究 2012年第3期30卷 29-34页

作者：张玉兰彭学超贾丽戴璐同济大学海洋与地球科学学院上海200092 广州海洋地质调查局广东广州510760 上海应用技术学院上海201418

依据南海低纬地区sa09-040孔高分辨率的孢粉记录,自下至上划分了4个孢粉组合带。从孢粉成分的变化,重建了22.25ka B P以来的植被与气候变化历史。结果表明:孢粉主要来源于婆罗洲和周围岛屿,孢粉1带(22.25～16.6ka B P),低山雨林植被发育... 详细信息

依据南海低纬地区sa09-040孔高分辨率的孢粉记录,自下至上划分了4个孢粉组合带。从孢粉成分的变化,重建了22.25ka B P以来的植被与气候变化历史。结果表明:孢粉主要来源于婆罗洲和周围岛屿,孢粉1带(22.25～16.6ka B P),低山雨林植被发育,为暖热气候,从测年时间看,当时为末次冰期晚期。孢粉2带(16.6～10.82ka B P,为末次冰消期),植被以热带低山雨林和低地雨林为主,针叶的松数量较多,当时的气温比现在低。孢粉3带(全新世早期,10.82～6.43ka B P),植被以热带低山雨林和低地雨林为主,针叶松属数量减少,气温比前期升高,海平面也上升。孢粉4带(全新世中晚期,6.43ka B P至今),全新世中期为炎热、湿润的气候环境,全新世晚期可能与婆罗洲现今的植被景观相近,为热、湿的气候环境。

关键词：南海孢粉古气候

Further recommenda.ions for trauma training of indian medical officers and medical students

在线全文

学校读者我要写书评

暂无评论

World Journal of Emergency Medicine 2011年第2期2卷 85-87页

作者： Robert J Douglas Tonia M Mezzini GAnand Kumar Andrew ja Giles Sportsmed sa 32 Payneham Road Stepney South Australia 5069 Clinic 275 Royal Adelaide Hospital Adelade South Australia 5000 Vinayaka Missions Kirubananda Va.iyar Medical College Hospital Salem Tamil Nadu India Emergency Department Royal Adelaide Hospital Adelaide South Australia 5000

in a recent article,[1] we have demonstrated a significant difference in the theoretical knowledge of both junior and senior emergency department (ED)medical offi cers (MOs) from salem, Ta.il Nadu, india,and the Royal Adelaide Hospital (RAH) Adelaide, South Austra.ia, in the management of severely injured trauma pa.ients, when compa.ing MOs who had completed an ATLS-type program with those who had not undertaken such a program.

关键词：

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

ZOU XiAИ SEИHUO

语文建设 1956年第S1期 4-4页

作者： Li Чi

jaηguaηzaujauze piηyan he sangaη,Geseηfeijaηzai zuguo de da.i saη,Tianje de maisui xiaηwomn zausou,Guηcaηde qidi wei womn huancaη.Womn sηlauduηrenmin de erz,Yηyan bu gufu zuguo de xiwa(?);Womn xia(?) ji qyn baised gez,Womn jou ji suaηηianqiaed cηbaη.viaru zuguo xyjau womn qydau naa.i,Womn (?)iu zankai c(?)ba(?) xia(?) naa.i feixiaη.Qinηaid xiauzaηqinηaid lausη,

关键词： HUO SE

手针内关穴对急性心肌缺血大鼠心率变异性影响

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

辽宁中医药大学学报 2015年第7期17卷 78-80页

作者：萨喆燕朱小香万隆许金森福建省中医药研究院福建福州350003

目的:观察手针对急性心肌缺血大鼠心率变异性(HRV)的影响。方法:通过结扎冠状动脉左前降支建立大鼠急性心肌缺血模型,手针内关穴并记录心电图,分析造模以及针刺前后HRV的差异。结果:急性心肌缺血模型复制后,HRV分析显示造模后低频成分/... 详细信息

目的:观察手针对急性心肌缺血大鼠心率变异性(HRV)的影响。方法:通过结扎冠状动脉左前降支建立大鼠急性心肌缺血模型,手针内关穴并记录心电图,分析造模以及针刺前后HRV的差异。结果:急性心肌缺血模型复制后,HRV分析显示造模后低频成分/高频成分(LF/HF)比值升高;针刺内关穴后,LF/HF比值降低。结论:手针内关穴可改善急性心肌缺血引起的HRV改变。

关键词：手针内关急性心肌缺血心率变异性