检索结果-南通市图书馆

science China Chemistry 1994年第8期37卷 955-963页

作者：吉永华 H.Hattori 徐科 s.Terakawa shanghai Institute of Physiology Academia SinicaShanghai 200031PRC national Institute for Physiological sciences Okazaki 444Japan

suitable pattern and high yield were obtained when the reverse-phase performance liquidchromatography (RP-HPLC) was used to separate neurotoxins from venom of Chinese scorpion Buthusmartensi *** this technique,the venom was first separated to two main *** toxicitytests show that the insect-selective neurotoxical components are concentrated in the latter region,from whichfive insect-selective neurotoxins designated by BmK IT1-IT5 were *** to the results of thetoxicity test as well as the amino acid composition and n-terminal analyses,BmK IT1 is the excitatory insectneurotoxin as reported in a previous paper,and the others are the newly found depressant *** molecules of all the four toxins are single-chain minipeptides of about 60 amino *** isoelectric points (pI) are between 8.3 and *** fact that BmK IT2 loses completely its insect tox-icity after being modified by fluorochrome shows that the positive charges on the molecular surface of thiskind of toxins are important to maintaining the bioactivity of the molecules.

关键词： scorpion Buthus martensi Karsch depressant insect-selective neurotoxin

在线全文

学校读者我要写书评

暂无评论

片上调试建立nexus标准

电子设计技术 2000年第9期 60-60页

作者： n.s.Manju nath 《EDn》技术编辑

调试高档嵌入式应用不再是一个静态的课题。半导体厂家、工具开发商和仪器制造公司已联手支持nexus标准。

关键词：片上调试定义引脚辅助口 nexus 处理器监视点作业步调试工具

Rational Fabrication of Hot sERs systems

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Rational Fabrication of Hot SERS Systems

The Mg-carbonate-Fe interaction:Implication for the fate of subducted carbonates and formation of diamond in the lower mantle

第三十五届国际光谱会议

作者： M.Moskovits s.J.Lee G.Braun n.Reich Department of Chemistry and Biochemistry University of California Santa BarbaraCA 93106USA Department of Chemistry and Biochemistry University of California Santa BarbaraCA 93106USA Department of Chemistry and Biochemistry University of California Santa BarbaraCA 93106USA Department of Chemistry and Biochemistry University of California Santa BarbaraCA 93106USA

＜正＞surface-enhanced Raman spectroscopy is a plasmonic phenomenon[1].In fact it can be argued that the current field of plasmonics was seeded by the discovery of sERs which pointed to the rich photonic possibilities that arise when localized plasmons are optically excited in appropriately nanostructured metals （and some other materials）.Plasmonic

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Geoscience Frontiers 2019年第4期10卷 1449-1458页

作者： naira s.Martirosyan Konstantin D. Litasov sergey s. Lobanov Alexander F. Goncharov Anton shatskiy Hiroaki Ohfuji Vitali Prakapenka sobolev Institute of Geology and Mineralogy Russian Academy of ScienceKoptyuga ave.3Novosibirsk630090Russia Geophysical Laboratory Carnegie Institution for ScienceWashingtonDC20015USA novosibirsk state University Pirogova st.2Novosibirsk630090Russia Geodynamic Research Center Ehime UniversityMatsuyamaEhime790-8577Japan Center for Advanced Radiation sources University of ChicagoChicagoIL60637USA

The fate of subducted carbonates in the lower mantle and at the core-mantle boundary was modelled via experiments in the MgCO3-Fe^0 system at 70-150 GPa and 800-2600 Kin a laser-heated diamond anvil *** in situ synchrotro n X-ray diffraction and ex situ transmission electron microscopy we show that the reduction of Mg-carbonate can be exemplified by:6 MgCO3+19 Fe=8 FeO+10(Mg0.6Fe^0.4)O+Fe7 C3+3 *** presented results suggest that the interaction of carbonates with Fe^0 or Fe^0-bearing rocks can produce Fe-carbide and diamond,which can accumulate in the D"region,depending on its carbon to Fe *** to the sluggish kinetics of the transformation,diamond can remain metastable at the core-mantle boundary(CMB)unless it is in a direct contact with *** addition,it can be remobilized by redox melting accompanying the generation of mantle plumes.

关键词： Deep carbon cycle Carbonate Carbide High pressure Redox reaction

在线全文

学校读者我要写书评

暂无评论

心性猝死流行病学的新观点

德国医学 1997年第2期14卷 108-109页

作者： s.n.Willich 郑智 Institut fr Epidemiologie Sozial-und PrventivmedizinKlinikum CharitD-10098 BerlinGermany 同济医科大学附属同济医院

心性猝死主要由于心律失常所致。在有关发病机制的研究中,对自主神经系统的功能和昼夜间以及季节性的因素都特别关注。心性猝死的所有研究方向最终集中在防治心律失常上。目前理想的药物(除β-阻滞剂外)较少见,故置入除颤器和导管消融... 详细信息

心性猝死主要由于心律失常所致。在有关发病机制的研究中,对自主神经系统的功能和昼夜间以及季节性的因素都特别关注。心性猝死的所有研究方向最终集中在防治心律失常上。目前理想的药物(除β-阻滞剂外)较少见,故置入除颤器和导管消融在心性猝死的预防中有了越来越重要的作用。心律失常抑制试验(CAsT)

关键词：猝死心性猝死流行病学

structural and biological engineering of 3D hydrogels for wound healing

在线全文

学校读者我要写书评

暂无评论

生物活性材料(英文) 2023年第6期24卷 197-235页

作者： Mohammad Hadi norahan sara Cristina Pedroza-González Mónica Gabriela sánchez-salazar Mario Moisés Álvarez Grissel Trujillo de santiago Escuela de Ingeniería y Ciencias Tecnológico de MonterreyMonterreyNL64849Mexico Centro de Biotecnología-FEMsA Tecnológico de MonterreyMonterreyNuevo LeónCP64849Mexico Departamento de Bioingeniería Tecnológico de MonterreyMonterreyNuevo LeónCP64849Mexico

Chronic wounds have become one of the most important issues for healthcare systems and are a leading cause of death *** dressings are necessary to facilitate wound *** wound dressings may substantially reduce healing time,reduce the risk of recurrent infections,and reduce the disability and costs *** the path of engineering of an ideal wound dressing,hydrogels have played a leading *** are 3D hydrophilic polymeric structures that can provide a protective barrier,mimic the native extracellular matrix(ECM),and provide a humid *** to their advantages,hydrogels(with different architectural,physical,mechanical,and biological properties)have been extensively explored as wound dressing *** we describe recent studies on hydrogels for wound healing applications with a strong focus on the interplay between the fabrication method used and the architectural,mechanical,and biological performance ***,we review different categories of additives which can enhance wound regeneration using 3D hydrogel *** engineering for wound healing applications promises the generation of smart solutions to solve this pressing problem,enabling key functionalities such as bacterial growth inhibition,enhanced re-epithelialization,vascularization,improved recovery of the tissue functionality,and overall,accelerated and effective wound healing.

关键词： Wound healing Wound dressing Hydrogel Tissue engineering 3D culture

Petrogenesis of Quebrada de la Mina and Altar north porphyries (Cordillera of san Juan, Argentina): Crustal assimilation and metallogenic implications

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

Geoscience Frontiers 2017年第5期8卷 1135-1159页

作者： Laura Maydagán Marta Franchini Massimo Chiaradia Verónica Bouhier noelia Di Giuseppe Roger Rey Luis Dimieri Centro Patagónico de Estudios Metalogenéticos-COnICET Argentina InGEOsUR-COnICET Departamento de Geología Universidad Nacional del Sur San Juan 670 8000 Bahía Blanca Argentina Instituto de Investigación en Paleobiología y Geología Universidad Nacional de Río Negro Av. Roca 1242 8332 Roca Argentina Departamento de Geología y Petróleo Facultad de Ingeniería Universidad Nacional del Comahue Buenos Aires 1400 8300 Neuquén Argentina section of Earth and Environmental sciences University of Geneva Switzerland Minera Peregrine Argentina s.A Santa Fe (Oeste) 117 Piso 4B Edificio Derby Ciudad San Juan Argentina

We investigate the geology of Altar north(Cu-Au) and Quebrada de la Mina(Au) porphyry deposits located in san Juan Province(Argentina), close to the large Altar porphyry copper deposit(995 Mt,0.35% Cu, 0.083 g/t Au), to present constraints on the magmatic processes that occurred in the parental magma chambers of these magmatic-hydrothermal systems. Altar north deposit comprises a plagioclase-amphibole-phyric dacite intrusion(Altar north barren porphyry) and a plagioclaseamphibole-biotite-phyric dacite stock(Altar north mineralized porphyry, 11.98 ± 0.19 Ma). In Quebrada de la Mina, a plagioclase-amphibole-biotite-quartz-phyric dacite stock(QDM porphyry,11.91±0.33 Ma) crops out. High sr/Y ratios(92-142) and amphibole compositions of Altar north barren and QDM porphyries reflect high magmatic oxidation states(fO_2= nnO+1.1 to+1.6) and high fH_2O conditions in their magmas. Zones and rims enriched in anorthite(An_(37-48))), srO(0.22-0.33 wt.%)and FeO(0.21-0.37 wt.%) in plagioclase phenocrysts are evidences of magmatic recharge processes in the magma chambers. Altar north and Quebrada de la Mina intrusions have relatively homogeneous isotopic compositions(^(87)sr/^(86)sr_(t)= 0.70450-0.70466, ε_(nD)(t) = +0.2 to +1.2) consistent with mixed mantle and crust contributions in their magmas. Higher Pb isotopes ratios(^(207)Pb/^(204)Pb=15.6276-15.6294) of these intrusions compared to other porphyries of the district, reflect an increase in the assimilation of high radiogenic Pb components in the magmas. Ages of zircon xenocrysts(297,210,204,69 Ma) revealed that the magmas have experienced assimilation of Miocene, Cretaceous, Triassic and Carboniferous crustal *** that precipitated sulfides in the Altar deposit may have remobilized Pb from the host rocks, as indicated by the ore minerals being more radiogenic(207Pb/204 Pb = 15.6243-15.6269) than their host intrusions. Au/Cu ratio in Altar porphyries(average Au/Cu ratio of 0.14 ×10^(-4)by weight in Altar Central)is hig

关键词： Porphyry High sulfidation epithermal Magmatic recharge Radiogenic isotopes Crustal assimilation Argentinian Andes

THE PERTURBATIOn METHOD APPLIED TO sOLVE ELAsTODYnAMIC PROBLEMs: WEDGE PROBLEM

在线全文

学校读者我要写书评

暂无评论

THE PERTURBATION METHOD APPLIED TO SOLVE ELASTODYNAMIC PROBL...

situational Diagnosis of the social sphere of Elders Living in Retirement Homes

理论与应用地球物理研讨会

作者： Yu-Chiung Teng Femarco, Inc. new York, n Y 10025, U s A

＜正＞ The root-mean-square perturbation method for solving wave scattering and diffraction introduced by Thau and Pao has been further developed to include the higher order terms. The method is particularly suited for solving, for example, the classic problem of wave propagation in wedged medium. As an illustration, the formal solutions to the problem of sH-wave propagation in a wedged half-space are obtained. Future numerical evaluation of the solutions is in order.

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Advances in Aging Research 2015年第2期4卷 42-46页

作者： Verónica Benavides Pando Martha Ornelas Contreras Jesús Enrique Peinado Pérez Juan Cristóbal Barrón Luján Lepoldo Refugio López Baca Faculty of Physical Culture sciences Autonomous University of Chihuahua Chihuahua Mexico

A situational diagnosis of the social sphere of elder permanent residents at retirement homes in Chihuahua City was created with the aid of the social Resource scale instrument. From the 51 participants, there were 30 female and 21 male elders. The results and conclusions of the present study highlight two major needs: a systematic assessment of permanent residents in retirement homes and the implementation of a physical activation program. The proposed physical activation program must focus on both, the recovery of motor independence and the increase of socialization activities which allows members of the retired community to improve their daily routine performance and lessens the work load on their caretakers.

关键词： situational Diagnosis Elder social sphere

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

一插即用:VXI助ATE用户一臂之力

电子设计技术 1995年第8期 42-44页

作者： n.s.Manju nath

Plug-and-play(一插即用)结构并不是针对PC的。为了VXI模块化仪器总线,测试行业正在P&P结构方面努力不懈。一旦销售商能够提供VXI P&P,测试工程师们就可以把精力放在测试样品上,而不必为如何获取可操作的测试仪器费心。

关键词： VXI 销售商总线模块化接口仪器驱动器 ATE 用户