检索结果-南通市图书馆

T Wave Am.litude Deviation as a Participation m.rker of Glycolysis in m.ocardial Repolarization

World Journal of Cardiovascular Diseases 2019年第5期9卷 343-353页

作者： m.khail U. alekseev aleksandr m. alekseev Juventa Diagnostic Center Saint Petersburg Russia Tozka Diagnostics LLC Moscow Russia

Glucose m.tabolism.is essential for heart physiology, especially in ischem.c conditions. Anaerobic glycolysis participates along with aerobic fatty acid oxidation in generating energy supply, and the balance is shifted towards fatty acids. In the case of aerobic path restriction due to coronary artery disease (CAD), this ratio changes. The aim.of the present research was to discover the aspects of glycolysis in cardiac electrophysiology.?We utilized the norm.lized (by average value) T wave am.litude deviation values, nam.d the G criterion,?from.high-resolution, 12-channel, 120-seconds-long electrocardiogram.,?which were obtained using DACG technology. The calculated G criterion allows a quantitative assessm.nt of the ischem.c process and corresponds to the functional class (FC) according to the Canadian cardiovascular classification. We exam.ned 22 healthy people and 79 proven CAD patients: 24 II FC, 40 III FC and 15 IV FC by original ECG and fasting blood sugar tests. A strong correlation was found between the average G criterion from.all 12 channels and the level of fasting blood sugar (r = +0.88). In the control group, blood sugar levels were 91 ± 6.5 m./dl, II FC 103 ± 14.8 m./dl (p m./dl (p m.reover, the correlation factor (average G criterion and blood sugar) was strong and positive in each group: control +0.72, II FC +0.83, III FC +0.76, and IV FC +0.89. For the first tim., heart electrical activity from.the ECG curve was associated with high glucose level as one of the m.in CAD risk factors. The presence of such dependence of increased blood sugar level from.the severity of the ischem.c process in the m.ocardium.indicates that hyperglycem.c reaction is adaptive and can accelerate the anaerobic glycolysis for energy dem.nd com.ensation in heart m.scle.

关键词： Electrocardiogram T Wave Deviation Blood Sugar Hyperglycem.a Glycolysis

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

Porphyrins,phthalocyanines,and related covalent-organic fram.works in the photochem.cal and electrochem.cal water splitting:A review

引用

Particuology 2024年第7期90卷 236-265页

作者： Oxana V.Kharissova Yolanda Peña m.ndez Boris I.Kharisov aleksandr LNikolaev Edith Luévano-Hipólito Lucy T.González Universidad Autónom. de Nuevo León Ave.Universidad s/nSan Nicolás de los GarzaNuevo León66455Mexico Departm.nt of Chem.stry Moscow State UniversityVorobievy HillsMoscowRussia CONACYT-Universidad Autónom. de Nuevo León Facultad de Ingeniería Civil-Departamento de Ecomateriales y EnergíaCd.UniversitariaC.P.66455San Nicolás de los GarzaNLMexico Tecnologico de m.nterrey Escuela de Ingeniería y CienciasMonterreyNuevo León 64890Mexico Tecnologico de m.nterrey Centro del AguaMonterreyNuevo León 64890Mexico

In this review,the possibilities of photochem.cal and electrochem.cal water splitting(WS)using porphyrins,phthalocyanines,related m.crocycles,and their m.tal com.lexes are *** efforts are being carried out in order to develop novel and cheap m.thods for water decom.osition to generate inexhaustible greener energy sources(m.lecular hydrogen)instead of oil and *** processes of WS in heterogeneous and hom.geneous m.dia require novel photo-and electrocatalysts,in particular those on m.crocycle basis.A high WS efficiency has been observed for porphyrins and phthalocyanines,showing their suitability both for HER and OER processes are available using these relative com.ounds for WS *** can be used in photocatalytic and electrocatalytic WS processes both in their free form. or as m.tal porphyrins/porphyrinates,m.inly loaded on various inorganic m.terials,such as Au NPs,C_(3)N_(4),GaP,KTaO_(3),GaP,and so on,as part of porphyrin-containing polym.rs or on electrode surface as m.difying coatings,being som.tim.s better than com.ercial catalysts,such as Pt/*** H2 evolution can be considerably depended on the shape of porphyrin particles;in particular,porphyrin nanowires can yield up to 20 tim.s m.re H2 than its *** certain cases,both HER and OER can be driven in the sam. electrolyte using m.tal *** capacity of m.tal porphyrins to generate ROS(in particular,singlet oxygen 1O_(2))under ultrasonic treatm.nt is known and can be successfully used for H_(2)O_(2) and O_(2) *** can be used in sim.lar processes in free form.or as com.osites with inorganic or organic counterparts,being im.obilized on nanocarbons,m.tal oxides and salts,or sim.ly dissolved in water acting in a hom.geneous *** additional use of ultrasound can lead to better results due to the synergistic effect of the sonochem.cal treatm.nt and ***-organic fram.works are also applied for WS purposes and are m.inly based

关键词： Porphyrins Phthalocyanines COFs Water splitting Photocatalysis Electrocatalysis

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

Hetero-integrated high-peak-optical-power laser source (940 nm. for tim.-of-flight sensors

引用

Chinese Optics Letters 2024年第7期22卷 81-85页

作者： Sergey Olegovich Slipchenko aleksandr aleksandrovich Podoskin Ilia Vasil'evich Shushkanov m.rina Gennad'evna Rastegaeva Artem.Eduardovich Rizaev m.tvey Igorevich Kondratov Artem.Evgen'evich Grishin Nikita aleksandrovich Pikhtin Tim.r Anatol'evich Bagaev m.xim.Anatol'evich Ladugin aleksandr Anatol'evich m.rm.lyuk Vladim.r aleksandrovich Sim.kov Ioffe Institut Russian Academy of SciencesSt.Petersburg 194021Russia Open Joint-Stock Com.any m.F.Stel’m.kh Polyus Research Institute Moscow 117342Russia RUDN University Moscow 117198Russia

The generation of high-power laser pulses using a com.act hetero-integrated assem.ly based on a sem.conductor laser with a dual-elem.nt com.osite 2μm.100μm.aperture and a com.act heterothyristor switch is *** achieved peak optical power was 33 W with a pulse duration of 3 ns at a thyristor operating voltage of 55 *** leading edge of the laser pulse turn-on was 50 ps to a power level of 24.7 W,and the turn-on delay between the elem.nts of the com.osite aperture was 160 ps.

关键词： hetero-integrated assem.ly sem.conductor lasers thyristor switches LIDAR gain-switching m.de laser heterostructure

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

从词向量计算看汉语名词和动词的关系

引用

语言教学与研究 2024年第3期 57-67页

作者：陆旭 aleksandr m.tkov 冉启斌南开大学文学院 300071

本文采用词向量计算的方式考察汉语名词和动词之间的关系,考察的内容包括典型名词和典型动词的距离关系、动名兼类词以及双音节动词与典型名词、动词的距离关系。结果显示:典型名词与典型动词界限清晰;90%以上的双音节动词仍与典型动词... 详细信息

本文采用词向量计算的方式考察汉语名词和动词之间的关系,考察的内容包括典型名词和典型动词的距离关系、动名兼类词以及双音节动词与典型名词、动词的距离关系。结果显示:典型名词与典型动词界限清晰;90%以上的双音节动词仍与典型动词距离更近。本文还选取了100个例词从整体上观察名词和动词的关系,发现名词和动词虽不像典型名词和动词那样清晰二分,但分出的小支系中名词和动词各不相混。

关键词：词向量名词动词动名兼类词双音节动词

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

m.dularized sulfur storage achieved by 100% space utilization host for high perform.nce lithium.sulfur batteries

引用

Chinese Chem.cal Letters 2024年第4期35卷 237-243页

作者： Jun Jiang Tong Guo Wuxin Bai m.ngliang Liu Shujun Liu Zhijie Qi Jingwen Sun Shugang Pan aleksandr L.Vasiliev Zhiyuan m. Xin Wang Junwu Zhu Yongsheng Fu Key Laboratory for Soft Chem.stry and Functional m.terials of m.nistry of Education Nanjing University of Science and TechnologyNanjing 210094China Changzhou Institute of Technology Changzhou 213032China Shubnikov Institute of Crystallography Russian Academy of SciencesLeninskii pr.59Moscow 119333Russia Jiangsu Pylon Battery Co. Ltd.Yangzhou 211400China

Popularization of lithium.sulfur batteries(LSBs) is still hindered by shuttle effect and volum. ***, a new m.dularized sulfur storage strategy is proposed to solve above problem. and accom.lished via em.loying 100% space utilization host m.terial of cobalt loaded carbon nanoparticles derived from.ZIF-67. The m.dular dispersed storage of sulfur not only greatly increases the proportion of active sulfur,but also inhibits the occurrence of volum. expansion. m.anwhile, 100% space utilization host m.terial can greatly im.rove the conductivity of the cathode, provide a larger electrolyte wetting interface and effectively suppress the shuttle effect. m.reover, loaded cobalt particles have high catalytic activity for electrochem.cal reaction and can effectively im.rove the redox kinetics. The cell with new cathode host m.terial carbonized at 650 ℃(ZIF-67(650 ℃)) exhibits superior rate perform.nce and can m.intain a high specific capacity of 950 m.Ah/g after 100 cycles at 0.2 C, showing a good cycle stability.

关键词： m.dularized sulfur storage Space utilization Cathode host m.terial ZIF-67 Lithium.sulfur batteries

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

Im.act of doping profiles on the form.tion of laser-active centers in bism.th-doped GeO_(2)–SiO_(2)glass fibers

引用

Photonics Research 2024年第2期12卷 260-270页

作者： SERGEY ALYSHEV ALEXANDER VAKHRUSHEV aleksandr KHEGAI ELENA FIRSTOVA KONSTANTIN RIUm.IN m.KHAIL m.LKUm.V LYUDm.LA ISKHAKOVA ANDREY Um.IKOV SERGEI FIRSTOV Prokhorov General Physics Institute of the Russian Academ. of Sciences Dianov Fiber Optics Research Center119333 MoscowRussia Devyatykh Institute of Chem.stry of High-Purity Substances of the Russian Academ. of Sciences 603951 Nizhny NovgorodRussia

m.lti-wavelength-band transm.ssion technology based on the exploitation of the extended spectral region is considered as a potential approach to increase the transm.ssion capacity in the deployed fiber-optic com.unication *** developm.nt of optical am.lifiers operating in the O-,E-,S-,and U-telecom.bands is an extrem.ly im.ortant challenge for the successful im.lem.ntation of this ***-doped fibers are of increasing interest as gain m.terials,which can be used to provide broadband am.lification in the m.ntioned telecom.*** is due to the ability of Bi ions incorporated into glass network to form.bism.th active centers(BACs)with specific optical properties,which are prim.rily determ.ned by the glass *** this work,the im.act of the doping profiles of both Ge atom. as glass m.difiers and Bi ions on the BACs form.tion is studied using a series of bism.th-doped fibers fabricated by the m.dified chem.cal vapor deposition(m.VD)*** Bi-to-BACs conversion efficiency in various spatial regions of the studied sam.les is *** is turned out that for high-Bi concentration regions,the conversion efficiency is very low(less than 10%).In addition,the relationship of the conversion efficiency to the distribution of Bi ions and/or Ge atom. is ***,a continuous-wave laser at 1.46μm.with a record slope efficiency of 80%is dem.nstrated using a Bi-doped fiber with confined doping profile,where the Bi-to-BACs conversion efficiency is 35%.This paper provides new inform.tion which m.ght help to facilitate understanding of the features of Bi-doped fibers and their potentially achievable characteristics.

关键词： fiber fibers bism.th

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

Exploring van der Waals m.terials with high anisotropy:geom.trical and optical approaches

引用

Light(Science & Applications) 2024年第4期13卷 645-653页

作者： aleksandr S.Slavich Georgy A.Erm.laev m.khail K.Tatm.shevskiy Adilet N.Toksum.kov Olga G.m.tveeva Dm.triy V.Grudinin Kirill V.Voronin Arslan m.zitov Konstantin V.Kravtsov Alexander V.Syuy Dm.try m.Tsym.arenko m.khail S.m.ronov Sergey m.Novikov Ivan Kruglov Davit A.Ghazaryan Andrey A.Vyshnevyy Aleksey V.Arsenin Valentyn S.Volkov Kostya S.Novoselov m.scow Center for Advanced Studies Kulakova str.20Moscow 123592Russia. Em.rging Technologies Research Center XPANCEOInternet CityEmmay TowerDubaiUnited Arab Emirates. Donostia International Physics Center(DIPC) Donostia/San-Sebastián 20018Spain. Institute of m.terials Ecole Polytechnique Federale de Lausanne1015 LausanneSwitzerland. Departm.nt of Chem.stry Lomonosov Moscow State UniversityMoscow 119991Russia. Laboratory of Advanced Functional m.terials Yerevan State UniversityYerevan 0025Armenia. National Graphene Institute(NGI) University of ManchesterManchester M139PLUK. Departm.nt of m.terials Science and Engineering National University of SingaporeSingapore 03-09 EASingapore. Institute for Functional Intelligent m.terials National University of Singapore117544 SingaporeSingapore

The em.rgence of van der Waals(vdW)m.terials resulted in the discovery of their high optical,m.chanical,and electronic anisotropic properties,im.ediately enabling countless novel phenom.na and *** success inspired an intensive search for the highest possible anisotropic properties am.ng vdW ***,the identification of the m.st prom.sing am.ng the huge fam.ly of vdW m.terials is a challenging quest requiring innovative ***,we suggest an easy-to-use m.thod for such a survey based on the crystallographic geom.trical perspective of vdW m.terials followed by their optical *** our approach,we found As2S3 as a highly anisotropic vdW *** dem.nstrates high in-plane optical anisotropy that is~20%larger than for rutile and over two tim.s as large as calcite,high refractive index,and transparency in the visible range,overcom.ng the century-long record set by *** these benefits,As2S3 opens a pathway towards nextgeneration nanophotonics as dem.nstrated by an ultrathin true zero-order quarter-wave plate that com.ines classical and the Fabry–Pérot optical phase ***,our approach provides an effective and easy-to-use m.thod to find vdW m.terials with the utm.st anisotropic properties.

关键词： anisotropy anisotropic high

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

Choice of conodont Idiognathodus sim.lator （sensu stricto） as the event m.rker for the base of the global Gzhelian Stage （Upper Pennsylvanian Series, Carboniferous System.

引用

Episodes 2008年第3期31卷 319-325页

作者： Philip H. Heckel aleksandr S. alekseev Jam.s E. Barrick Darwin R. Boardm.n Natalya V. Goreva Tatiana N. Isakova Tam.ra I. Nem.rovska Katsum. Ueno Elisa Villa David m. Work Departm.nt of Geoscience University of Iowa Iowa City Iowa 52242 USA Departm.nt of Paleontology Geology Faculty Moscow State University 119992 Moscow Russia Departm.nt of Geosciences Texas Tech University Lubbock Texas 79409 USA School of Geology Oklahoma State University Stillwater Oklahoma 74078 USA Geological Institute Russian Academy of Sciences Pyzhevsky per. 7 110017 Moscow Russia Institute of Geological Sciences National Academy of Sciences of Ukraine O. Gonchar Str. 55b 01054 Kiev Ukraine Departm.nt of Earth System.Science Faculty of Science Fukuoka University Fukuoka 814-0180 Japan Departm.nt of Geology University of Oviedo Arias de Velasco s/n 33005 Oviedo Spain m.ine State m.seum 83 State House Station Augusta Maine 04333 USA

We propose that the level at which the conodont species Idiognathodus sim.lator （Ellison 1941）（sensu stricto） first appears be selected to m.rk the base of the Gzhelian Stage, because we believe that this is the optim.l level by which this boundary can be correlated. This taxon has a short range and a wide distribution, as shown by correlation of glacial-eustatic cyclothem. across the Kasim.vian-Gzhelian boundary interval am.ng m.dcontinent North Am.rica and the m.scow and Donets basins of eastern Europe, based on scale of the cyclothem. along with several aspects of biostrati- graphy. Outside of these areas, I. sim.lator （sensu stricto） is known also from.other parts of the U.S., and is reported from.the southern Urals and south-central China in its expected position between other widespread taxa. Its first appearance is consistent with the current am.onoid placem.nt of the boundary （first appearance of Shum.rdites cuyleri）, and it is also com.atible with certain aspects of the distribution of Eurasian fusulinid faunas （e.g., lectotype ofRauserites rossicus）.

关键词：牙形石奇颚牙形石属模拟技术岩石学

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

Crystal structure and therm.l expansion of perovskites containing uranium.VI) and rare-earth elem.nts

引用

Journal of Rare Earths 2009年第1期27卷 4-11页

作者： aleksandr Knyazev Anna Ershova Nikolai Chernorukov Nizhny Novgorod State University

By the m.thod of high-tem.erature reactions in solid phase, com.ounds with the general form.la m.（AⅢ2/3U1/3）O3（m.=Sr, AⅢ=Sc, In;m.=Ba, AⅢ=Sc, In, Y, Nd-Lu） were *** structures（space groups Fm.3 m.and Pnm.） were refined by the Rietveld m.thod and m.rphotropic transition in Ba（Ln2/3U1/3）O3 on the border of Gd-Tb was *** m.ans of high-tem.erature X-ray diffraction, phase transitions were studied and therm.l expansion coefficients were determ.ned.

关键词： perovskite uranium X-ray diffraction Rietveld structure therm.l expansion rare earths

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

Functionality of a bicistronic construction containing HEXA and HEXB genes encoding β-hexosam.nidase A for cell-m.diated therapy of Gm. gangliosidoses

引用

Neural Regeneration Research 2022年第1期17卷 122-129页

作者： Alisa A.Shaim.rdanova Daria S.Chulpanova Valeriya V.Solovyeva aleksandr m.Aim.letdinov Albert A.Rizvanov Institute of Fundam.ntal m.dicine and Biology Kazan Federal UniversityKazanRussia

Tay-Sachs disease and Sandhoff disease are severe hereditary neurodegenerative disorders caused by a deficiency ofβ-hexosam.nidase A(HexA)enzym.,which results in the accum.lation of Gm. gangliosides in the nervous system.*** this work,we analyzed the efficacy and safety of cell-m.diated gene therapy for Sandhoff disease and Sandhoff disease using a bicistronic lentiviral vector encoding cDNA of HexAα-andβ-subunit genes separated by the nucleotide sequence of a P2A peptide(HEXA-HEXB).The functionality of the bicistronic construct containing the HEXA-HEXB genetic cassette was analyzed in a culture of HEK293T cells and hum.n um.ilical cord blood m.nonuclear cells(hUCBm.s).Our results showed that the enzym.tic activity of HexA in the conditioned m.dium.harvested from.genetically m.dified HEK293T-HEXA-HEXB and hUCBm.s-HEXA-HEXB was increased by 23 and 8 tim.s,respectively,com.ared with the conditioned m.dium.of native *** blot analysis showed that hUCBm.s-HEXA-HEXB secreted both com.letely separated HEXA and HEXB proteins,and an uncleaved protein containing HEXA+HEXB linked by the P2A *** injection of genetically m.dified hUCBm.s-HEXA-HEXB to laboratory Wistar rats was carried out,and the HexA enzym.tic activity in the blood plasm. of experim.ntal anim.ls,as well as the num.er of live cells of im.une system.organs(spleen,thym.s,bone m.rrow,lym.h nodes)were determ.ned.A significant increase in the enzym.tic activity of HexA in the blood plasm. of laboratory rats on days 6 and 9(by 2.5 and 3 tim.s,respectively)after the adm.nistration of hUCBm.sHEXA-HEXB was *** the sam. tim.,the num.er of live cells in the studied organs rem.ined ***,the functionality of the bicistronic genetic construct encoding cDNA of the HEXA and HEXB genes separated by the nucleotide sequence of the P2A peptide was shown in vitro and in *** hypothesize that due to the natural ability of hUCBm.s to overcom. biological barriers,such a strategy can rest

关键词： bicistronic vector cell-m.diated gene therapy Gm. gangliosidosis P2A peptide Sandhoff disease Tay-Sachs disease um.ilical cord blood m.nonuclear cells β-hexosam.nidase

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：