检索结果-南通市图书馆

Basal metabolic rate in free-living tropical birds： the influence of phylogenetic, behavioral, and ecological factors

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

Current Zoology 2018年第1期64卷 33-43页

作者： Andrey BUSHUEV Oleg TOLSTENKOV ekaterina ZUBKOVA Eugenia SOLOVYEVA Anvar KERIMOV Department of Vertebrate Zoology Faculty of Biology Lomonosov Moscow State University Leninskie Gory 1/12 Moscow 119234 Russia Joint Russian-Vietnamese Tropical Research and Technological Center South Branch Street 3/2 3 10 District Ho Chi Minh City Vietnam Laboratory of Experimental Parasitology Center of Parasitology A.N. Severtsov Institute of Ecology and Evolution Russian Academy of Sciences Leninskij prospekt 33 Moscow 119071 Russia Zoological Museum of Lomonosov Moscow State University Bolshaya Nikitskaya B Moscow 125009 Russia

The majority of our knowledge of avian energetics is based on studies of birds from temperate and high latitudes. Using the largest existing sample of wild-caught Old World tropical species, we showed that birds from Southern Vietnam had lower basal metabolic rate （BMR） than temperate species. The strongest dissimilarity between tropical and temperate species was the low scaling exponent in the allometric relation between BMR and body mass in tropical birds （the regression slope was 0.573）. The passerine migrants to temperate and high latitudes had higher BMR than tropical sedentary passerines. Body mass alone accounted for 93% of the variation in BMR （body mass ranged from 5 to 252 g）. Contrary to some other studies, we did not find evidence besides the above mentioned that phylogeny, taxonomy, behavior, or ecology have a significant influence on BMR variation among tropical birds.

关键词： allometry BMR body mass energy metabolism tropical birds.

Detection and Analysis of Cell Signals from Photoacoustic Flow Cytometry

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

Detection and Analysis of Cell Signals from Photoacoustic Fl...

作者： Larina ekaterina 上海交通大学

学位级别：硕士

One important and growing direction in modern medicine is the diagnosis of diseases on their early *** time recognition of body disorders can prevent fast worsen of illnesses,help to cure them ***,at the same time,early-stage diagnosis is a very difficult task because,at this stage,diseases pretty often do not display any *** is a reason why nowadays medicine seeks for new ways of illness recognition and modern science is developing directions to help to solve such a *** perspective tool is Photoacoustic ***（PA）imaging is a hybrid biomedical imaging method that exploits both acoustical and optical properties,thus,the PAFC combines advantages of both approaches,while downsides are *** technics combination provides both functional and structural *** Flow Cytometry（PAFC）is able to receive and separate the PA signal from different types of *** main aim of this thesis is to study the ability of PAFC system to detect the photoacoustic signals from different cells by the example of red blood cells,white blood cells,and melanoma cells.

关键词：

Deerminants of Current Account Balances of Brics

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

Deerminants of Current Account Balances of Brics

作者： Melnik ekaterina 东南大学

学位级别：硕士

“金砖五国”是由巴西、俄罗斯、印度、中国和南非五个世界主要新兴经济体组成的国际合作平台。据世界银行的数据显示,2016年金砖五国的联合GDP占世界GDP总量的22%,充分反映了“金砖”联盟的规模。国际贸易是该组织框架的支柱之一。因此...

“金砖五国”是由巴西、俄罗斯、印度、中国和南非五个世界主要新兴经济体组成的国际合作平台。据世界银行的数据显示,2016年金砖五国的联合GDP占世界GDP总量的22%,充分反映了“金砖”联盟的规模。国际贸易是该组织框架的支柱之一。因此,本文的研究旨在分析金砖国家贸易发展的近期趋势,更具体地说,我们从经验上分析哪些经济因素会影响到金砖五国的经常账户余额,并考察各自的作用机制及影响程度。经常账户余额是反映国家经济运行情况的重要指标,对这一论题展开研究可以让我们更加深刻地认识“金砖五国”的经济发展情况。在全球经济失衡的态势下,理解金砖国家如何发展国际贸易是非常重要的。根据国际货币基金组织2016年发布的报告显示,“金砖五国”中只有中国和俄罗斯存在经常账户盈余。因此,我们试图结合理论模型和实证研究的结果为上述国家制定相应政策,以期改善该国的经济状况。本文实证部分主要基于面板回归模型进行分析,该分析以五个成员国的经常账户指标作为因变量,并根据现有经验研究选取核心解释变量与必要的控制变量。根据我们的分析结果,国内产出增长、货币供应量和实际有效汇率是“金砖五国”经常账户余额的重要决定因素,而贸易开放度没有显著影响。我们企图通过考察能够对“金砖五国”的经常账户余额产生重大影响的经济因素,了解其因果关系,为我们在制定改善经济不平衡发展的政策方面提供借鉴与参考。

关键词：

Research on Technology Platform Construction of Perm Region Chemical Materials Industry

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

Research on Technology Platform Construction of Perm Region ...

作者： Printceva ekaterina 华南理工大学

学位级别：硕士

化工材料作为新材料领域一个重要的基础性组成部分,其发展影响到国民经济和社会发展的方方面面,已经成为评价一个国家是否具有国际竞争能力的一项重要指标。从全球范围来看,俄罗斯化工材料产业在高端阶段发展的过度阶段,与美日欧等化工... 详细信息

化工材料作为新材料领域一个重要的基础性组成部分,其发展影响到国民经济和社会发展的方方面面,已经成为评价一个国家是否具有国际竞争能力的一项重要指标。从全球范围来看,俄罗斯化工材料产业在高端阶段发展的过度阶段,与美日欧等化工新材料高端发展国家和地区相比仍有些行业有很大差距。俄罗斯彼尔姆边疆区作为乌拉尔老工业基地和国家材料产业基地之一,化工新材料产业在其整个经济格局中作用举足轻重,同时经已经取得不俗的成绩,具备了良好的产业基础;但是由于各种资源分散、技术集成度低、技术共享度不够等多种原因而迟迟未形成区域优势,进一步发展遇到瓶颈。基于此,本人结合彼尔姆边疆区化工材料产业现状,从技术需求与供给现状的角度研究分析其中存在的问题,发现阻碍其发展的根本原因是技术供需对接不良,未形成灵活的对接机制。于是结合问题所在,从必要性与可行性两个方面论证构建“彼尔姆边疆区化工材料产业技术平台”这一解决策略。在文章主体部分详细研究论述了平台的性质、逻辑构架、组织结构、运行机制及技术创新战略选择等问题,最后针对彼尔姆边疆区平台构建实践提出了一些政策建议。以其通过彼尔姆边疆区技术平台的搭建,整合全资源,提高技术集成度,增强彼尔姆边疆区化工材料产业的竞争力,实现跨越式发展。

关键词：技术平台区域经济化工行业

Determinants of Energy Security:China and India LNG Supply Security

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

Determinants of Energy Security:China and India LNG Supply S...

作者： ekaterina Ershova 华东师范大学

学位级别：硕士

能源是人类进程的一大先决条件。不断增长的产量自然需要越来越多的能源消耗。在当今所有可利用的能源资源中,天然气变得越来越重要,现在正成为缓解“石油高峰”和化解长期化石燃料消耗造成的环境污染等问题的普遍性补救措施。尤其重要... 详细信息

能源是人类进程的一大先决条件。不断增长的产量自然需要越来越多的能源消耗。在当今所有可利用的能源资源中,天然气变得越来越重要,现在正成为缓解“石油高峰”和化解长期化石燃料消耗造成的环境污染等问题的普遍性补救措施。尤其重要的是,天然气作为能源资源的议题,对于像中国和印度这样高速增长和高能耗的国家来说,其能源结构和生态问题比其他任何国家都要严重得多。考虑到日益增长的燃料需求,中国和印度作为全球第二大和第三大液化天然气进口国,将很快根据其内部政策和需求来定义市场。因此,了解其能源供应战略的概念及其背后的推动力,将有助于增进能源市场的理解、预测能源资源的未来需求和检测能源安全发展的总体趋势。

关键词：中国印度能源安全能源政策能源市场液化天然气国际液化天然气市场

Human bone graft cytocompatibility with mesenchymal stromal cells is comparable after thermal sterilization and washing followed byγ-irradiation:an in vitro study

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

Regenerative Biomaterials 2018年第2期5卷 85-92页

作者： Dmitry Labutin Konstantin Vorobyov Svetlana Bozhkova ekaterina Polyakova Tatyana Vodopyanova Division of Wound Infection Treatment and Prevention Vreden Russian Research Institute of Traumatology and OrthopedicsSt.PetersburgRussian Federation

Human bone allografts present a better alternative to autografts in terms of minimization of the harvesting procedure *** to the use in clinical applications,they require sterilization which aims to reduce *** often comes at the expense of their biological properties as carriers of *** this study,we evaluated the cytocompatibility of human bone allografts processed and sterilized by three different methods withmesenchymal stromal *** morphology,biological and biochemical properties of the extracted bone-conditionedmedium and viability of cells were *** found that chemical sterilization had a strong negative effect on cell viability,whereas thermal sterilization and washing with subsequentγ-irradiation both resulted in a bone graft compatible with the progenitor ***,washing of the bone prior to sterilization allowed solid removal of cell debris and other bone marrow *** together,our findings demonstrate the importance of a proper choice of the bone graft processing method for the production of the biomaterial suitable for tissue engineering.

关键词： bone grafts bone sterilization mesenchymal stromal cells biocompatibility testing

Fluid Inclusion Evidences for the P-T Conditions of Quartz Veins Formation in the Black Shale-Hosted Gold Deposits, Bodaybo Ore Region, Russia

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

Journal of Earth Science 2020年第3期31卷 514-522页

作者： Natalia N.Ankusheva ekaterina E.Palenova Svetlana N.Shanina Institute of Mineralogy South-Urals Federal Research Center of Mineralogy and GeoecologyUrals BranchRussian Academy of SciencesMiass 456317Russia Geological Department South-Urals State UniversityMiass 456300Russia Institute of Geology of the Komi Science Center Urals BranchRussian Academy of SciencesSyktyvkar 167982Russia

The P-T conditions of auriferous and barren quartz veins from Kopylovsky,Kavkaz and Krasnoye gold deposits in Proterozoic black shales of Bodaybo ore region are presented the first time in this *** inclusions trapped in auriferous quartz are aqueous Na±K-Mg chloride with salinity of 6 wt.%-8.8 wt.%*** temperatures vary from 260 to 350℃,and calculated trapping pressures are 1.2-1.6 *** fluids trapped in barren quartz have more complicated compositions with Na,K,Mg and Fe chlorides,salinity up to 13 wt.%NaCleqv,and homogenization temperatures ranging between 140 and 280℃.The volatiles in fluids are dominated by H2O,followed by CO2 with minor amounts of CH4 and *** suppose that auriferous and barren quartz veins have been formed due to the basic metamorphogenic fluid as evidenced by the close slat and gas fluid composition.

关键词： Bodaybo black shales gold deposits gold-bearing quartz barren veins fluid inclusions P-T conditions

U-Pb dating of bastnäsite from the Vuoriyarvi massif:An example application for assessing the REE potential of carbonatite-related deposits

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

Geoscience Frontiers 2024年第5期15卷 444-453页

作者： Evgeniy N.Kozlov ekaterina N.Fomina Qiuli Li Jiao Li Geological Institute Kola Science Centre of the Russian Academy of SciencesApatity 184209Russia Institute of Geology and Geophysics Chinese Academy of SciencesBeijing 100029China

The Vuoriyarvi massif is a Devonian multistage alkaline-ultrabasic carbonatite complex within the Kola alkaline *** carbonatites of the Vuoriyarvi massif contain abundant rare-earth mineralization mainly represented by ancylite-(Ce)and bastnäsite-(Ce).Ancylite was previously shown to have probably formed in the Devonian(ca.365 Ma)during an early postmagmatic *** geological observations have revealed a much later crystallization of bastnäsite but have not been able to specify the exact age of the *** in situ U-Pb dating of bastnäsite allowed us to constrain its ***äsite for this study was extracted from two varieties of dolomite carbonatite breccias cemented by(1)quartz-bastnäsite and(2)strontianite aggregates(hereafter bastnäsite-rich and strontianite-rich carbonatites–BRC and SRC,respectively).The obtained age estimations(237.7±9.8 Ma and 239.9±4.1 Ma,respectively)indicate that both studied rocks were formed during a single *** revealed age difference(~125 Ma)excludes the genetic link between the bastnäsite origin and regional alkaline magmatism,pointing out an additional source for the Vuoriyarvi bastnäsite-bearing ***,the obtained U-Pb ages provide strong evidence that a Triassic event is responsible for the occurrence of bastnäsite mineralization due to hydrothermal REE redistribution from the Devonian ancylite-rich *** of the REEs released during this process via dissolution of ancylite were precipitated in situ as bastnäsite,while strontium was transported and incorporated into *** Pb isotopic characteristics of bastnäsite(^(206)Pb/^(204)Pb=18.1±0.1,^(207)Pb/^(204)Pb=15.3±0.1,and^(207)Pb/^(206)Pb=0.84±0.01)are most probably inherited from the Devonian host rocks of the Vuoriyarvi massif involved in the Triassic *** signatures of Pb,Sr,and Nd show that the depleted mantle and lower crust played the leading role in formation of the Vuoriyarvi alkaline

关键词： Bastnäsite REE Carbonatites U-Pb dating Vuoriyarvi Kola alkaline province

Structural traits of woody plants and geomorphological conditions to the vegetation recovery at Ksudach caldera(Southern Kamchatka) since the explosive eruption in 1907

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

Journal of Mountain Science 2020年第7期17卷 1613-1635页

作者： KOPANINA Anna V LEBEDEVA ekaterina V VLASOVA Inna I TALSKIKH Anastasia V Institute of Marine Geology and Geophysics Far Eastern Branch of the Russian Academy of SciencesNauka street1 B693022Yuzhno-SakhalinskRussia Institute of Geography Russian Academy of SciencesStaromonetny s-str.29119017MoscowRussia

This study considers the restoration of the plant cover destroyed by a catastrophic volcano eruption in the south of Kamchatka Peninsula(the Ksudach caldera,Shtyubel cone),with a particular attention to the role of woody *** aims to qualitatively estimate(at a qualitative level)the rate of the primary succession development depending on the microrelief and the modern relief-forming *** vegetation recovery in the caldera after the Shtyubel cone eruption 109 years ago proceeds slowly and *** proceeds most slowly on a thick tephra mantle continuously disturbed by water and wind erosion,lahars,debris flows,landslides,*** conditions are most typical of the western part of the caldera dominated by pumice fields with occasional patches of pioneer herbs and dwarf *** tundra communities with gradually expanding patches of shrub alder develop in the southern,eastern and northeastern parts of the Ksudach *** 1997 the area of the shrub alder communities has increased by 1.9 times,while the alpine tundra–by 1.3 times *** woody plants(dwarf shrubs and prostrate shrubs)are of particular importance in the process of the vegetation recovery on pumice *** suggest that the bark thickness of woody plants is an integrated indicator,which may serve for estimating the state of ecosystem in the course of the primary succession development on juvenile *** extremely inhospitable environments cause changes in physiological processes in the plant body and in its bark in *** results show that woody plants have a"thin"bark and develop some structural-functional arrangements for keeping bark tissues at their ***,the woody plant structure and the rate of changes in plant communities are under control of the geomorphic conditions and primarily–of physicochemical features of the pyroclastic cover.

关键词： Ksudach caldera Pioneer species Woody plants Bark Pyroclastic deposits Geomorphological processes