检索结果-南通市图书馆

Global changes explain the long-term demographic trend of the Eurasian common lizard (Squamata: lacertidae)

Current Zoology 2022年第2期68卷 221-228页

作者： jose l.HORREO Patrick S.fITZE Department of Genetics Physiology and MicrobiologyComplutense University of MadridC/Jose Antonio Novais 12Madrid 28040Spain Department of Biodiversity and Evolutionary Biology National Museum of Natural Sciences(CSIC)C/Jose Gutierrez Abascal 2Madrid 28006Spain

The demographic trend of a species depends on the dynamics of its local populations,which can be compromised by local or by global ***,the relevance of local and global phenomena has rarely been investigated ***,we tested whether local phenomena compromised a species'demographic trend using the Eurasian common lizard Zootoca vivipara,the terrestrial reptile exhibiting the widest geographic distribution,as a model *** analyzed the species'ancient demographic trend using genetic data from its 6 allopatric genetic clades and tested whether its demographic trend mainly depended on single clades or on global *** vivipara's effective population size increased since 2.3 million years ago and started to increase steeply and continuously from 0.531 million years *** growth rate exhibited 2 maxima,both occurring during global climatic changes and important vegetation changes on the northern *** population size and growth rate were negatively correlated with global surface temperatures,in line with global parameters driving long-term demographic *** vivipara's ancient demography was neither driven by a single clade,nor by the 2 clades that colonized huge geographic areas after the last *** low importance of local phenomena,suggests that the experimentally demonstrated high sensitivity of this species to short-term ecological changes is a response in order to cope with short-term and local *** suggests that what affected its long-term demographic trend the most,were not these local changes/responses,but rather the important and prolonged global climatic changes and important vegetation changes on the northern hemisphere,including the opening up of the forest by humans.

关键词： ancient demographic trend anthropological activity Bayesian Skyline Plots early humans Eemian interglacial Eurasian common lizard mid-Brunhes event

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

A multi-shot target wheel assembly for high-repetition-rate, laser-driven proton acceleration

引用

High Power laser Science and Engineering 2024年第2期12卷 87-94页

作者： j.Penas A.Bembibre D.Cortina-Gil l.Martin A.Reija C.Ruiz M.Seimetz A.Alejo j.Benlliure Instituto Galego de fisica de Altas Enerxias Universidade de Santiago de CompostelaSantiago de CompostelaSpain laboratorio laser de Aceleracion y Aplicaciones RIAIDTUniversidade de Santiago de CompostelaSantiago de CompostelaSpain Instituto Universitario de física fundamental y Matematicas y Dpto.de Didactica de la Matematica y de las Ciencias Experimentales Universidad de SalamancaSalamancaSpain Instituto de Instrumentación para Imagen Molecular(I3M) CSIC-Universitat Politecnica de ValenciaValenciaSpain

A multi-shot target assembly and automatic alignment procedure for laser–plasma proton acceleration at high repetition rate are *** assembly is based on a multi-target rotating wheel capable of hosting more than 5000 targets,mounted on a 3D motorized stage to allow rapid replenishment and alignment of the target material between laser *** automatic alignment procedure consists of a detailed mapping of the impact positions at the target surface prior to the irradiation that ensures stable operation of the target,which alongside the purpose-built design of the target wheel,enables operation at rates up to 10 *** and continuous laser-driven proton acceleration at 10 Hz is demonstrated,with observed cut-off energy stability about 15%.

关键词： high repetition rate laser-plasma acceleration multi-shot operation proton source target assembly

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

The literature analysis of the main postoperative complications in closed calcaneus fracture by open reduction and internal fixation

The literature analysis of the main postoperative complicati...

引用

2013中国工程院科技论坛暨浙江省骨科学学术年会

作者： X YU Q-j PANG l CHEN C-C YANG X-j CHEN Department of Orthopedics Center Ningbo No.2 Hospital

for the purpose of providing the basis for clinical treatment strategy of calcaneus fracture,we evaluated the postoperative complications by literature analysis,which were published from 1995 to 2012 and retrieved through database such as Pubmed,Medline,Cochrane Database,Elsevier,and Ovid *** evaluation, 21 clinical reports met the inclusion criteria of *** results of analysis indicated the main complications including infection and skin flap necrosis,neurovascular injury,malreduction and implant problems,posttraumatic arthritis and *** them,the infection is the most common complications, while the other complications should be also worthy concerning for it may become a life-altering *** concluded that the postoperative complications may not be avoided,however,professional care and treatment without delay could still obtain satisfactory outcome.

关键词： Calcaneus fracture Postoperative complications literature analysis

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

Perch Associated Expression of Phenotypic Plasticity in limb Development and Sprint Speed in Agamid lizard Calotes versicolor: A laboratory Study

引用

Asian Herpetological Research 2018年第3期9卷 175-181页

作者： Veena H.f.AMMANNA Srinivas K.SAIDAPUR Bhagyashri A.SHANBHAG Department of Zoology Karnatak University

New born hatchlings of Calotes versicolor were reared in terrarium having narrow or wide perches for a period of 4-month and their snout vent length（SVl）, tail, fore and hindlimb lengths were measured at monthly intervals. limb postures（closer to the body or spread away from the body） were also recorded. The sprint speed was recorded in two and four-month old lizards on a 1 m long race track providing 45° or 60° slope. In both the groups, SVl and tail lengths were comparable but the limb lengths and their growth rates were significantly greater in lizards of wider perch group. The lizards reared with narrow perches positioned their limbs closer to the body; while those reared on wider perches spread their limbs away from their body. further, the latter exhibited significantly higher sprint speed regardless of the slope of the race track over those of narrow perch group. Sprint speeds of lizards in both groups were correlated with the limb sizes. The study showed that the lizards reared on narrow or wide perches exhibited divergent adaptive responses（phenotypic plasticity） by developing longer or shorter limbs and corresponding changes in their sprint speeds. These findings support the idea that availability of perch structure during early development evokes adaptive plasticity in the limb development and associated locomotory performance in arboreal lizards like C. versicolor.

关键词： behavior Calotes hatchlings limb lizard perch plasticity sprint speed

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

春小麦细胞膜的稳定性及耐热性

引用

国外农学（麦类作物） 1990年第6期 9-12页

作者： j.f.Shanahan 周桂莲

春小麦(Triticum aestivum l.)是美国北大平原地区的主要作物之一。灌浆期间的高温胁迫是春小麦增产的一个主要限制因素,在北大平原的南部尤为如此。开花期对8个春小麦基因型的旗叶进行了电解质渗漏或膜稳定性(MT)试验,试验结果与种植... 详细信息

春小麦(Triticum aestivum l.)是美国北大平原地区的主要作物之一。灌浆期间的高温胁迫是春小麦增产的一个主要限制因素,在北大平原的南部尤为如此。开花期对8个春小麦基因型的旗叶进行了电解质渗漏或膜稳定性(MT)试验,试验结果与种植在三个不同点上的那些基因型的产量相关。这些基因型来自两个杂交组合,两个组合中的亲本对该地区或热胁迫气候既有适应的,也有不适应的。三个试验点分别代表北大平原的北、中、南部地区。根据MT值,这8个基因型可以分为耐热型(HT,n=4)和敏感型(HS,n=4),HT型和HS型在大平原的中,北部获得了相似的籽粒产量。然而在南部试验点上(与其它两个点相比,该点灌浆期气温相当高),HT型比HS型增产21％,它们的产量分别为4.28Mg/ha(兆克/公顷)和3.55Mg/ha。在北、中、南三个试验点上,七月份平均温度依次为19.5、21.7和23.4℃。从本实验的结果可以看出,MT检验是选择HT型春小麦的一个有效选择途径。

关键词：小麦春小麦细胞膜稳定性耐热性

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

Numerical Modelling of the Aeroelastic Behaviour and Variable loads for the Turbine Stage in 3D Transonic flow

引用

journal of Thermal Science 2005年第3期14卷 236-241页

作者： V.I. GNESIN l.V. KOlODYAZHNAYA R. RZADKOWSKI Department of Aerohydromechanics Institute of Mechanical Engineering Problems National Academy of Sciences of Ukraine 2/10 Pozharsky st. Kharkov 61046 Ukraine ProfessorDepartment of Aerohydromechanics Institute of Mechanical Engineering Problems National Academy of Sciences of Ukraine 2/10 Pozharsky st. Kharkov 61046 UkraineDepartment of Dynamics of Machines Institute of Fluid Flow Machinery Polish Academy of Sciences J. Fiszera st. 14 Gdansk 80 952 Poland

In this study presented the algorithm proposed involves the coupled solution of 3-D unsteady flow through a turbine stage and the dynamics problem for rotor-blade motion by the action of aerodynamic forces, without separating the outer and inner flow fluctuations. The partially integrated method involves the solution of the fluid and structural equations separately, but information is exchanged at each time step, so that solution from one domain is used as a boundary condition for the other domain. 3-D transonic gas flow through the stator and rotor blades in relative motion with periodicity on the whole annulus is described by the unsteady Euler conservation equations, which are integrated using the explicit monotonous finite-volume difference scheme of Godunov-Kolgan. The structural analysis uses the modal approach and a 3-D finite element model of a blade. A calculation has been done for the last stage of the steam turbine, under design and off-design regimes. It is shown that the amplitude-frequency spectrum of blade oscillations contains the high frequency harmonics, corresponding to the rotor moving past one stator blade pitch, and low frequency harmonics caused by blade oscillations and flow nonuniformity downstream from the blade row; moreover, the spectrum involves the harmonics which are not multiples of the rotation frequency.

关键词： turbine stage 3D unsteady flow blade oscillations

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

Caspase-1 activation by NlRP3 inflammasome dampens Il-33-dependent house dust mite-induced allergic lung inflammation

引用

journal of Molecular Cell Biology 2015年第4期7卷 351-365页

作者： fahima Madouri Noelline Guillou louis fauconnier Tiffany Marchiol Nathalie Rouxel Pauline Chenuet Aurelie ledru lionel Apetoh franc¸ois Ghiringhelli Mathias Chamaillard Song Guo Zheng fabrice Trovero Valerie f.j.Quesniaux Bernhard Ryffel Dieudonnee Togbe laboratory of Experimental and Molecular Immunology and Neurogenetics(INEM) UMR 7355 CNRS-University of OrleansF-45071 Orleans-Cedex2France Artimmune SAS 45100 Orle´ansFrance faculte´de Me´decine University of BourgogneDijonFrance INSERM U866DijonFrance Centre Georges franc¸ois leclerc DijonFrance CIIl–Center for Infection and Immunity of lille INSERM U1019Institut PasteurLilleFrance Division of Rheumatology Penn State Milton S.Hershey Medical CenterHersheyPA 17033USA Clinical Immunology Section Third Affiliated Hospital at Sun Yat-Sen UniversityGuangzhou 510630China

The cysteine protease caspase-1(Casp-1)contributes to innate immunity through the assembly of NlRP3,NlRC4,AIM2,and NlRP6 *** we ask whether caspase-1 activation plays a regulatory role in house dust mite(HDM)-induced experimental allergic airway *** report enhanced airway inflammation in caspase-1-deficient mice exposed toHDMwith a marked eosinophil recruitment,increased expression of Il-4,Il-5,Il-13,aswell as full-length and bioactive ***,mice deficient for NlRP3 failed to control eosinophil influx in the airways and displayed augmented Th2 cytokine and chemokine levels,suggesting that the NlPR3 inflammasome complex controls HDM-induced ***-33 neutralization by administration of soluble ST2 receptor inhibited the enhanced allergic inflammation,while administration of recombinant Il-33 during challenge phase enhanced allergic inflammation in caspase-1-deficient ***,we show that caspase-1,NlRP3,and ASC,but not NlRC4,contribute to the upregulation of allergic lung ***,we cannot exclude an effect of caspase-11,because caspase-1-deficient mice are deficient for both ***,absence of caspase-1 is associated with increased expression of Il-33,uric acid,and spleen tyrosine kinase(Syk)*** study highlights acritical role of caspase-1 activation andNlPR3/ASCinflammasomecomplex in the down-modulation of Il-33 in vivo and in vitro,thereby regulating Th2 response in HDM-induced allergic lung inflammation.

关键词： house dust mite allergic asthma caspase-1 inﬂammasomes Il-33 spleen tyrosine kinase(Syk) uric acid

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

Seasonal dependency of controlling factors on the phytoplankton production in Taihu lake, China

引用

journal of Environmental Sciences 2019年第2期31卷 278-288页

作者： Qiaohua Zhao jing Wang jianjian Wang julian X.l.Wang College of Hydrometeorology Nanjing University of Information Science and Technology Air Resources laboratory National Oceanic and Atmospheric AdministrationCollege Park

In this study, 44 profiles of gross primary productivity(GPP) and sunlight, along with water temperature, Chlorophyll-a(Chla) and nutrients, were observed in Meiliang Bay of Taihu lake, China, in the spring, summer, and fall seasons. Effects of water temperature, light,and nutrient concentration were examined in relation to the GPP-unit-Chla(GPP of algae per Chla). The results showed that the optimum temperature for the GPP of phytoplankton was 27.9°C, the optimal PNA-unit-Chla(photon number absorbed by phytoplankton per Chla) was 0.25(mol), and the HSCN-unit-Chla and HSCP-unit-Chla(half-saturation constants of nitrogen and phosphorus of algae per Chla) were 0.005(mg/l) and 0.0004(mg/l), respectively. The seasonal dependency of the effect of different factors on the GPP was analyzed. Compared with temperature and nutrients, light was found to be the most important factor affecting the GPP during the three seasons. The effect of temperature and nutrients on the GPP of phytoplankton has obvious seasonal change. In spring, temperature was the secondary factor affecting the GPP of phytoplankton, and the effect of nutrients may be negligible in the eutrophic lake on account of temperature limit, which showed that the GPP of algae was only affected by the physical process. In summer and fall, temperature didn't affect the GPP of algae, and the presence of nutrients was the secondary factor affecting the GPP of phytoplankton. from summer to fall, effect of phosphorus was weakened and effect of nitrogen was enhanced.

关键词： Temperature limited effect Gross primary productivity Eutrophication light limit Optimum temperature Half-saturation constants

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

Radon exhalation from phosphogypsum stabilized in sulfur polymer cement

引用

Natural Science 2013年第5期5卷 646-652页

作者： Irene García-Diaz francisco josé Alguacil Manuel Gázquez juan Pedro Bolivar Israel lópez Coto félix A. lópez Centro Nacional de Investigaciones Metalúrgicas (CENIM) CSIC Avda. Gregorio del Amo Madrid Spain Departamento de física Aplicada Universidad de Huelva Campus del El Carmen Huelva Spain

Phosphogypsum (PG), primary by-product from phosphoric acid production, is accumulated in large stock-piles which were active until 2010, when spills were banned. It is considered as NORM material that contains radionuclides from 238U and decay series which are of most radiotoxicity. PG was valorized and/or recycled in a building material, sulfur polymer cement (SPC). The SPC-PG samples reach the international regulation to use in the manufacture of building materials without radiological restrictions, except the sample with the 50% of PG. Under normal conditions of ventilation the contribution to the expected radon indoor concentration is also below the international recommendation.

关键词： Radon Phosphogypsum NORM Radioactivity Sulfur polymer Cement

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

游离类脂物和面粉蛋白质含量与面包烘烤品质的关系

引用

国外农学（麦类作物） 1993年第5期 13-16页

作者： j.f.Panozzo 刘广珠

对14个品质不同的小麦品种种植了2年.2年氮肥施用量均分6种。同时对面粉中蛋白质和已烷提取的(游离)类脂物间的关系.以及年份和籽粒硬度对面包烘烤品质的影响进行了研究。正如所预计的.蛋白质对施氮处理的反应主要取决于籽粒硬度和种植... 详细信息

对14个品质不同的小麦品种种植了2年.2年氮肥施用量均分6种。同时对面粉中蛋白质和已烷提取的(游离)类脂物间的关系.以及年份和籽粒硬度对面包烘烤品质的影响进行了研究。正如所预计的.蛋白质对施氮处理的反应主要取决于籽粒硬度和种植年份(或最初土壤肥力).游离类脂物的反应与施氮量无关.仅与籽粒中蛋白质含量呈弱相关。硬粒小麦品种中的游离类脂物含量比软粒品种中的高。面粉中的蛋白质和游离类脂物对面包体积均有显著影响,对蛋白质含量进行校正之后.游离类脂物的影响仍然显著。根据面粉中蛋白质和游离类脂物建立了一个回归模式.为了证明预测的精确性,还计算了耐性限度。例如.一个样品的游离类脂物=0.12g/10g面粉、蛋白质=10.0％.其预测面包体积约为1645ml.在90％置信水平下.不大于1763ml,根据这一模式提出了一个有效的供烤品质筛选策略,并对之进行了评价。

关键词：小麦面粉蛋白面包烘烤品质

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：