检索结果-南通市图书馆

Competition for shelter between four invasive gobiids and two native benthic fish species

Current Zoology 2011年第6期57卷 844-851页

作者： N. VAN KESSEL m. DOrENBOSCH m.r.m. DE BOEr r.S.E.W. LEUVEN g. VAN DEr VELDE radboud University Nijmegen Institute for Water and Wetland Research Department of Animal Ecology and Ecophysiology EO. Box 9010 6500 GL Nijmegen The Netherlands radboud University Nijmegen Institute for Water and Wetland Research Department of Environmental Science P.O. Box 9010 6500 GL Nijmegen The Netherlands Natuurbalans - Limes Divergens P.O. Box 31070 6503 CB Nijmegen The Netherlands Netherlands Institute of Ecology （NIOO - KNAW） EO. Box 50 6700 AB Wageningen The Netherlands Netherlands Centre for Biodiversity Naturalis EO. Box 9517 2300 RA Leiden The Netherlands

recent invasions by non-native gobiid fish species that are ongoing in the Western European rivers rhine and meuse, will lead to interactions with native benthic fish species. Since both non-native gobiids and native benthic species are bottom dwelling species with a preference for shelter during at least part of their life cycle, it is likely that competition for shelter will occur between these non-native and native species when shelter is a limiting factor. To investigate the importance of this mecha- nism for species replacements, various habitat choice experiments were conducted between two common native benthic fish spe- cies （Cottus perifretum and Barbatula barbatula） and four invasive non-native gobiid species （Proterorhinus semilunaris, Neogo- bius melanostomus, N. kessleri and N. fluviatilis）. The first series of single specimen experiments determined the habitat choice of each individual fish species. In a second series of competition experiments, shifts in habitat choice in comparison with the previ- ously observed habitat choice, were determined when a native benthic fish species co-occurred with non-native gobiid species. Native C. perifretum displayed a significant shift in habitat choice in co-occurrence with the gobiids N. kessleri or P. semilunaris. C. perifretum was outcompeted and moved from the available shelter place to less preferred habitat types. During the competition experiments no change in habitat choice of B. barbatula was shown. Our study therefore suggests that competition for shelter is likely to occur in rivers invaded by N. kessleri and P. semilunaris at sites where shelter is limiting

关键词： Bullhead Exotic species Habitat choice Invasive gobies rivers rhine and meuse Stone loach

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

Predicting maximum Lifespan Limits at mean menopausal Age

引用

Journal of mathematical research with Applications 2025年第1期 133-142页

作者： m.SUmATHI S.ANTONY CArLA Department of mathematics N.M.S.S.Vellaichamy Nadar College research Scholar (Part-time) Madurai Kamaraj University

The age at which a woman enters natural menopause has also been associated to death from any cause. menopause is a natural component of aging that happens between the ages of 45 and 55, with the average menopausal age being 51. Previous research has revealed the age at which women reach menopause, but there is no evidence to support the link between menopause and longevity. We made a study in assessing the limits of maximum lifespan at menopausal age in our previous article. In this paper, we aim to predict the maximum lifespan of women at mean menopausal age.

关键词：

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Three-dimensional Numerical Study of Laminar Confined Slot Jet Impingement Cooling using Slurry of Nano—encapsulated Phase Change material

引用

Journal of Thermal Science 2016年第5期25卷 431-439页

作者： m.mohib Ur rehman Z.g Qu r.P.Fu Key Laboratory of Thermal Fluid Science and Engineering Ministry of EductionSchool of Energy and Power EngineeringXi'an Jiaotong University

This Article presents a three dimensional numerical model investigating thermal performance and hydrodynamics features of the confined slot jet impingement using slurry of Nano Encapsulated Phase Change material(NEPCm)as a *** slurry is composed of water as a base fluid and n-octadecane NEPCm particles with mean diameter of 100 nm suspended in it.A single phase fluid approach is employed to model the NEPCm *** thermo physical properties of the NEPCm slurry are computed using modern approaches being proposed recently and governing equations are solved with a commercial Finite Volume based *** effects of jet reynolds number varying from 100 to 600 and particle volume fraction ranging from 0% to 28% are *** computed results are validated by comparing Nusselt number values at stagnation point with the previously published results with water as working *** was found that adding NEPCm to the base fluid results with considerable amount of heat transfer *** highest values of heat transfer coefficients are observed at H/W=4 and C_m=***,due to the higher viscosity of slurry compared with the base fluid,the slurry can produce drastic increase in pressure drop of the system that increases with NEPCm particle loading and jet reynolds number.

关键词： Nano-encapsulated phase change material heat transfer enhancement confined slot jet impingement

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

Quasi—Elastic Electron—Deuteron Scattering and Calculation of Neutron Electromagnetic Form Factors at Q2=1.75 to 4.00（geV／c）^2

引用

Communications in Theoretical Physics 2003年第6期39卷 685-688页

作者： N.ghahramany m.VaezzadehAsadi g.r.Boroun PhysicsDepartment UniversityofShirazShiraz71454IslamicRepublicofIran

Electric and magnetic form factors of neutron are calculated via electron-deuteron scattering at 1.511 ～5.507 geV energy using SLAC group data. Our results show that the neutron electric form factor is not equal to zero;rather it has a small value, indicating that in spite of the fact that total charge is almost neutral, there is a nonuniformcharge distribution within the neutron, and that magnetic form factor follows the dipole fit.

关键词：拟弹性电子-中子散射电磁性偶极配合结构分析原子核电荷分布

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

Laminar Forced Convection from a rotating Horizontal Cylinder in Cross Flow

引用

Journal of Thermal Science 2017年第2期26卷 153-159页

作者： Prabul Chandran g.Venugopal H.Abdul Jaleel m.r.rajkumar Dept of mechanical Engineering College of Engineering TrivandrumKeralaIndia Dept of mechanical Engineering Government Engineering College ThrissurKeralaIndia

The influence of non-dimensional rotational velocity, flow reynolds number and Prandtl number of the fluid on laminar forced convection from a rotating horizontal cylinder subject to constant heat flux boundary condition is numerically investigated. The numerical simulations have been conducted using commercial Computational Fluid Dynamics package CFX available in ANSYS Workbench 14. results are presented for the non-dimensional rotational velocity α ranging from 0 to 4, flow reynolds number from 25 to 40 and Prandtl number of the fluid from 0.7 to 5.4. The rotational effects results in reduction in heat transfer compared to heat transfer from stationary heated cylinder due to thickening of boundary layer as consequence of the rotation of the cylinder. Heat transfer rate increases with increase in Prandtl number of the fluid.

关键词： Heated rotating cylinder Non-dimensional rotational velocity Flow reynolds number Prandtl number

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

Charge Dependency of Strong Nuclear Force via Phase Shift Analysis of Nucleon-Nucleon Potential

引用

Communications in Theoretical Physics 2004年第2期41卷 279-282页

作者： N.ghahramany g.r.Boroun m.Hashemi Physics Department Shiraz UniversityShiraz 71454Iran

Using the most recent phase shift data for pp,nn,and np elastic scattering for different states (l=0,1,...) in the energy range of i meV to 350 meV,the charge dependency of the strong nuclear force is *** results indicate that although the charge independency holds in most of the energy range,such charge independency is broken in the particular energy range of 120 meV to 200 meV for all partial wave states considered here.

关键词： elastic scattering nuclear force phase shift nucleon-nucleon potential

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

grain Size Effect on the martensite Formation in a High-manganese TWIP Steel by the rietveld method

引用

Journal of materials Science & Technology 2010年第2期26卷 181-186页

作者： g. Dini A. Najafizadeh S.m. monir-Vaghefi r. Ueji Department of materials Engineering Isfahan University of Technology Department of Advanced materials Science Faculty of EngineeringKagawa University

The aim of the present work was to study the effect of austenite grain size （AgS） on the martensite formation in a high-manganese twinning-induced plasticity （TWIP） steel. The results of a quantitative microstructural characterization of the steel by the whole X-ray pattern fitting rietveld software, materials analysis using diffraction （mAUD）, indicated that the volume fraction of αbcc-martensite increases with increasing AgS. However, the value of the stacking fault probability （Psf） does not show a large variation for samples with different values of AgS under water-quenching conditions.

关键词： Austenite grain size martensite formation TWIP steel Stacking fault probability

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

Calculation of Surface Energy of metals and Alloys by theElectron Density Functional method

引用

Journal of materials Science & Technology 1998年第4期14卷 320-322页

作者： Kuznetsov, V.m. Kadyrov, r.I. rudenskii, g.E. Institute of Strength Physics and material Science Russian Academy of Sciences Siberian Branch 634048 Tomsk Academicheskii av. 2/1 Russian Federation

The surface energy of (100), (110), (111) surfaces in Ni, Al and ordered alloys NiAl and Ni//3Al has been calculated within the framework of methodology based upon the electron density functional method. The results of calculations are in good agreement with the known for pure metals experimental data and in case of Ni//3Al alloy. There is also a good agreement with the results obtained by calculation using the embedded atom method. The investigation has been carried out in this work to show that the surface energy sigma of alloys can not be interpreted as an averaged concentration sigma of pure metals. For NiAl, the obtained results reveal considerable distinctions in anisotropy of sigma in comparison to the anisotropy of surface energy in pure metals. (Edited author abstract) 8 refs.

关键词： Aluminum

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

Spastin and alsin protein interactome analyses begin to reveal key canonical pathways and suggest novel druggable targets

引用

Neural regeneration research 2025年第3期20卷 725-739页

作者： Benjamin r.Helmold Angela Ahrens Zachary Fitzgerald P.Hande Ozdinler Department of Neurology Feinberg School of MedicineNorthwestern UniversityChicagoILUSA Center for molecular Innovation and Drug Discovery Center for Developmental TherapeuticsChemistry of Life Processes InstituteNorthwestern UniversityEvanstonILUSA mesulam Center for Cognitive Neurology and Alzheimer’s Disease Feinberg School of MedicineNorthwestern UniversityChicagoILUSA Feinberg School of medicine Les Turner ALS Center at Northwestern UniversityChicagoILUSA

Developing effective and long-term treatment strategies for rare and complex neurodegenerative diseases is challenging. One of the major roadblocks is the extensive heterogeneity among patients. This hinders understanding the underlying disease-causing mechanisms and building solutions that have implications for a broad spectrum of patients. One potential solution is to develop personalized medicine approaches based on strategies that target the most prevalent cellular events that are perturbed in patients. Especially in patients with a known genetic mutation, it may be possible to understand how these mutations contribute to problems that lead to neurodegeneration. Protein–protein interaction analyses offer great advantages for revealing how proteins interact, which cellular events are primarily involved in these interactions, and how they become affected when key genes are mutated in patients. This line of investigation also suggests novel druggable targets for patients with different mutations. Here, we focus on alsin and spastin, two proteins that are identified as “causative” for amyotrophic lateral sclerosis and hereditary spastic paraplegia, respectively, when mutated. Our review analyzes the protein interactome for alsin and spastin, the canonical pathways that are primarily important for each protein domain, as well as compounds that are either Food and Drug Administration–approved or are in active clinical trials concerning the affected cellular pathways. This line of research begins to pave the way for personalized medicine approaches that are desperately needed for rare neurodegenerative diseases that are complex and heterogeneous.

关键词： ALS2 alsin amyotrophic lateral sclerosis hereditary spastic paraplegia neurodegenerative diseases personalized medicine precision medicine protein interactome protein-protein interactions SPAST spastin

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

Texture evaluation in warm deformation of an extruded mg-6Al-3Zn alloy

引用

Journal of magnesium and Alloys 2016年第2期4卷 89-98页

作者： m.Kavyani g.r.Ebrahimi m.Sanjari m.Haghshenas department of materials and polymer engineering hakim sabzevari universitysabzevariran department of mining and materials engineering mcgill universitymontrealcanada department of mechanical engineering university of north dakotagrand forksusa

To assess the effect of strain and strain rate on texture evolution of an extruded mg–6Al–3Zn alloy,compression tests were carried *** were prepared in the extrusion direction(ED)and normal direction(ND).The compression tests were performed at 250℃ and with different strain rates of 0.01 sec−1 and 1 sec−1 and different *** observation and texture investigation show that at early stages of deformation,extension twins lead to the development of strong basal texture intensity along rolling direction(rD)in ED samples and contraction twins result in texture evolution along transverse direction(TD)in ND ***,microstructural investigation at high strains reveals that dynamic recrystallization occurs in both samples and consequently the basal texture intensity has been decreased.

关键词： Extruded magnesium alloy Deformation texture Twinning recrystallization

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

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：