检索结果-南通市图书馆

A test of genetic association among male nuptial coloration, female mating preference, and male aggression bias within a polymorphic population of cichlid fish

引用

Current Zoology 2013年第2期59卷 221-229页

作者： Inke van der SLUIJS Peter D. DIJKSTRA Charlotte M. LINDEYER BertanneVISSER Alan M. SMITH ton g. g. gROOTHUIS Jacques J. M. van ALPHEN Ole SEEHAUSEN Department of Animal Ecology Institute of Biology Leiden University PO Box 9516 2300 RA Leiden The Netherlands The University of Texas at Austin Section of Integrative Biology 1 University Station-C0930 Austin TX 78712 United States Department of Biological Sciences University of Hull Cottingham Road Hull HU6 7RX United Kingdom Behavioural Biology group University of Groningen P.O. Box 14 9750 AA Haren The Netherlands Institute of Zoology University of Bern Baltzerstrasse CH-3012 Bern Switzerland Eawag Swiss Federal Institute for Aquatic Science and Technology Centre of Ecology Evolution & Biogeochemistry Depart- ment ofFish Ecology & Evolution Seestrasse 97 6047 Kastanienbaum Switzerland

Both inter- and intrasexual selection have been implicated in the origin and maintenance of species-rich taxa with di- verse sexual traits. Simultaneous disruptive selection by female mate choice and male-male competition can, in theory, lead to ~,;peciation without geographical isolation if both act on the same male trait. Female mate choice can generate discontinuities in gene flow, while male-male competition can generate negative frequency-dependent selection stabilizing the male trait polymor- phism. Speciation may be facilitated when mating preference and/or aggression bias are physically linked to the trait they operate on. We tested for genetic associations among female mating preference, male aggression bias and male coloration in the Lake Victoria cichlid Pundamilia. We crossed females from a phenotypically variable population with males from both extreme ends of the phenotype distribution in the same population （blue or red）. Male offspring of a red sire were significantly redder than males of a blue sire, indicating that intra-population variation in male coloration is heritable. We tested mating preferences of female offspring and aggression biases of male offspring using binary choice tests. There was no evidence for associations at the family level between female mating preferences and coloration of sires, but dam identity had a significant effect on female mate prefe- rence. Sons of the red sire directed significantly more aggression to red than blue males, whereas sons of the blue sire did not show any bias. There was a positive correlation among individuals between male aggression bias and body coloration, possibly due to pleiotropy or physical linkage, which could facilitate the maintenance of color polymorphism [Current Zoology 59 （2）： 221-229, 2013].

关键词： Disruptive selection Sexual selection Speciation Pundamilia Linkage disequilibrium

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

针灸与冠心病

引用

中国康复 2021年第6期36卷 326-326页

作者：周海琪(译) ton g College of Chinese Medicine Graduate Institute of Acupuncture Science China Medical University Taichung Taiwan. College of Medicine China Medical University Taichung Taiwan. Management Office for Health Data China Medical University Hospital Taichung Taiwan. Department of Acupuncture China Medical University Hospital Taichung Taiwan. Department of Public Health China Medical University Taichung Taiwan. College of Chinese Medicine Graduate Institute of Chinese Medicine China Medical University Taichung Taiwan. Department of Chinese Medicine China Medical University Hospital Taichung Taiwan. Chinese Medicine Research Center China Medical University Taichung Taiwan.

流行病学研究发现骨关节炎(OA)与发展中的心血管疾病(CAD)的风险增加有关。由于针灸已被证明能改善OA患者的疼痛和功能,本研究调查了针灸对OA患者冠心病发病率的影响。这项台湾研究随机抽取了100万名强制性国民健康保险(NIH)项目受益者... 详细信息

流行病学研究发现骨关节炎(OA)与发展中的心血管疾病(CAD)的风险增加有关。由于针灸已被证明能改善OA患者的疼痛和功能,本研究调查了针灸对OA患者冠心病发病率的影响。这项台湾研究随机抽取了100万名强制性国民健康保险(NIH)项目受益者的记录。这份名单中有些人被确诊为OA患者。这些患者被进一步分为同时接受针灸治疗的患者(OA+AP)、未接受针灸治疗的匹配患者(OA-AP)和匹配的非骨关节炎对照组(-OA)。主要结果变量是冠心病的发展。在5046名OA患者中,803人被诊断为冠心病。在调整了性别、年龄、合并症和药物使用后,Cox比例风险回归分析发现,与OA+AP组相比,OA-AP组发生冠心病的风险更大[相对危险度(RR)为3.04](P<0.001)。此外,与OA+AP组相比,-OA组发生冠心病的RR为1.88(P<0.001)。五年来OA-AP组住院和门诊的日均医疗费用显著高于OA+AP组(P=0.0001)。结论:这项针对台湾成年人的大规模调查发现,患骨关节炎的人患冠心病的风险比没有骨关节炎的人高,但接受针灸治疗的人患冠心病的风险却有所降低。

关键词：骨关节炎冠心病发病率相对危险度流行病学研究心血管疾病针灸医疗费用国民健康保险

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

Challenges and opportunities in the production of magnesium parts by directed energy deposition processes

引用

Journal of Magnesium and Alloys 2024年第5期12卷 1663-1686页

作者： gürel Cam Ali günen Iskenderun Technical University Faculty of Engineering and Natural SciencesDepartment of Mechanical Engineering31200 Iskenderun-HatayTurkey Iskenderun Technical University Faculty of Engineering and Natural SciencesDepartment of Metallurgy and Materials Engineering31200 Iskenderun-HatayTurkey

Mg-alloys have gained considerable attention in recent years for their outstanding properties such as lightweight,high specific strength,and corrosion resistance,making them attractive for applications in medical,aerospace,automotive,and other transport ***,their widespread application is hindered by their low formability at room temperature due to limited slip *** Mg-alloys have low mechanical properties due to the presence of casting defects such as porosity and anisotropy in addition to the high *** casting methods benefit from established process optimization techniques for these problems,additive manufacturing methods are increasingly replacing casting methods in Mg alloys as they provide more precise control over the microstructure and allow specific grain orientations,potentially enabling easier optimization of anisotropy properties in certain *** metal additive manufacturing(MAM)technology also results in some manufacturing defects such as inhomogeneous microstructural evolution and porosity and additively manufactured Mg alloy parts exhibit lower properties than the wrought parts,they in general exhibit superior properties than the cast ***,MAM is a promising technique to produce Mg alloy *** energy deposition processes,particularly wire arc directed energy deposition(WA-DED),have emerged as an advantageous additive manufacturing(AM)technique for metallic materials including magnesium alloys,offering advantages such as high deposition rates,improved material efficiency,and reduced production costs compared to subtractive ***,the inherent challenges associated with magnesium,such as its high reactivity and susceptibility to oxidation,pose unique hurdles in the application of this *** review paper delves into the progress made in the application of DED technology to Mg-alloys,its challenges,and ***,the predominant imperfections,notably inhomo

关键词： Additive manufacturing DED processes Arc-DED Wire arc additive manufacturing(WAAM) 3-D printing High deposition rate

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

Effects of frothers on bubbles size and flotation performance of hydrophobic minerals

引用

Journal of Central South University 2024年第7期31卷 2280-2299页

作者： gülşah gÜVEN Berivan TUNÇ ŞBeste AYDIN gülay BULUT Mineral Processing Engineering Department Faculty of MinesIstanbul Technical UniversityMaslak 34469IstanbulTurkey Research Center Metso OutotecKuparitie 1028101 PoriFinland

Frothers facilitate the reduction of bubbles size by preventing bubbles coalescence and produce more stable *** collision probability of the bubbles and particles substantially increases by decreasing bubble *** the same volume system,fewer bubbles result from a distribution of large-sized bubbles,and more bubbles result from a distribution of small-sized *** this research,fundamental two-phase frother characterization parameters were aimed to link with three-phase coal and talc flotation *** this purpose,the effect of single and dual frother systems on inhibiting bubble coalescence was investigated with methyl isobutyl carbinol(MIBC),isooctanol(2 ethyl hexanol),pine oil,and Dowfroth *** on the results of single frothers,isooctanol at the lowest critical coalescence concentration(CCC)value of 6×10^(−6) achieved the smallest bubbles with Sauter mean diameter of 0.80 *** blending Dowfroth 250 and pine oil,the bubbles size decreased significantly,reaching 0.45 *** the highest recoveries in coal flotation were obtained in single and frother blends where the bubbles size was measured as the smallest in two-phase system,and such a relationship was not found for talc flotation.

关键词： flotation frother blends bubble size coal and talc flotation

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

Recent research in mechanical properties of geopolymer-based ultrahigh-performance concrete:A review

引用

Defence Technology（防务技术） 2024年第2期32卷 67-88页

作者： g.Murali Division of Research&Innovation Uttaranchal UniversityDehradun 248007India

Due to the growing need for sustainable and ultra-high-strength construction materials,scientists have created an innovative ultra-high-performance concrete called geopolymer based ultra-highperformance concrete(gUHPC).Besides,in the last few decades,there have been a lot of explosions and ballistic attacks around the world,which have killed many civilians and fighters in border *** this context,this article reviews the fresh state and mechanical properties of ***,the ingredients of gUHPC and fresh properties such as setting time and flowability are briefly ***,the review of compressive strength,flexure strength,tensile strength and modulus of elasticity of fibrous ***,the blast and projectile impact resistance performance was ***,the microstructural characteristics were reviewed using the scanning electron microscope and X-ray Powder *** review outcome reveals that the mechanical properties were increased when 30%silica fume was added to a higher dose of steel fibre to improve the microstructure of *** is hypothesized that the brittleness of gUHPC was mitigated by adding 1.5%steel fibre reinforcement,which played a role in the decrease of contact explosion cratering and *** the need for cement in gUHPC was a key factor in the review,indicating a promising potential for lowering carbon ***,gUHPC research is still in its early stages,so more study is required before its full potential can be utilized.

关键词： Mechanical properties Blast Projectile impact Fibre geopolymer Silica fume Alkaline activators

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

病人的心路历程——终末期慢性阻塞性肺疾病患者的最后愿望

引用

英国医学杂志中文版 2009年第2期12卷 122-124页

作者： Daisy J A Janssen ton P g Alsemgeest guy A M Widdershoven Emiel F M Wouters Jos M g A Schols Martijn A Spruit 施焕中(译) Central Department of Treatment and Care Proteion Thuis 6085NM Horn Netherlands Shool for Public Health and Primary Care Care and Public Health Research Institute ( CAPHRI ) Faculty of Heslth Medicine and Life Sciences University of Maastricht 6229ER Maastricht Netherlands Department of Respiratory Medicine MUMC + 6229HX Maastricht Netherlands Centre for Integrated Rehabilitation of (Organ Failure CIRO) 6085NM Horn Netherlands Department of general Practice Faculty of Health Medicine and Life Sciences University of Maastricht 6229HA Maastricht Netherlands Department of Research Development and Education Centre for Integrated Rehabilitation of Organ Failure (CIRO) 6085NM Horn Netherlands 武汉华中科技大学同济医学院附属协和医院呼吸内科

荷兰一位55岁终末期慢性阻塞性肺疾病女性患者明确要求安乐死，并获得了批准。2007年11月，一位55岁终末期慢性阻塞性肺疾病（COPD）女性患者入住护理院。该患者于1997年诊断罹患COPD并进行过7次肺康复治疗（1998年、2000年、2001年、2... 详细信息

荷兰一位55岁终末期慢性阻塞性肺疾病女性患者明确要求安乐死，并获得了批准。2007年11月，一位55岁终末期慢性阻塞性肺疾病（COPD）女性患者入住护理院。该患者于1997年诊断罹患COPD并进行过7次肺康复治疗（1998年、2000年、2001年、2002年、2005年2次、2006年）。2000年行了肺减容手术，同年出现一次卒中，导致左臂瘫痪并左半身疼痛。2006年医生建议该患者接受长期氧疗。

关键词：慢性阻塞性肺疾病患者慢性阻塞性肺疾病(COPD) 终末期心路历程愿望女性患者肺减容手术康复治疗

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

Nitrogen mineralization in the oldest climax communities in the eastern Mediterranean region

引用

Journal of Forestry Research 2024年第1期35卷 213-228页

作者： Fatma Selcen Sakar gürcan güleryüz Department of Biology Section Ecology GörükleGraduate School of Natural and Applied ScienceUniversity of Bursa Uludağ16059 NilüferBursaTurkey Department of Biology Section Ecology GörükleFaculty of Science and ArtsUniversity of Bursa Uludağ16059 NilüferBursaTurkey

In this study,we investigated how tree species affect N mineralization in connection to some soil properties and seconder metabolite levels of litter,in the soil of the old-est native forest *** the oldest pure communi-ties of Pinus nigra(PN),Fagus orientalis(FO),and Abies bornmuelleriana(AB)in the mountain range of Mount Uludağ,Bursa,Turkey,annual net yield and N mineraliza-tion in the 0-5-and 5-20-cm soil layers were determined in a field incubation study over 1 *** locations were chosen from 1300 to 1600 m a.s.l.,and moisture content(%),pH,water-holding capacity(%),organic C,total N,and C/N ratio,and annual net mineral N yield of the soil and hydro-lyzed tannic acid and total phenolic compounds in litter were compared for these forest *** had the highest annual net Nmin yield(43.9±4.8 kg ha^(-1) a^(-1)),*** the lowest(30.5±4.2 kg ha^(-1) a^(-1)).Our findings show that in the oldest forest ecosystems,the seasonal soil moisture content and tree species play an essential role in N cycling and that hydrolyzed tannic acids and total phenolic compounds effectively control N *** acid and total phenolics in the litter were found to inhibit nitrification,but total phenolics were found to stimulate ammonification.

关键词： Oldest forest communities Nitrogen mineralization Nitrification Tannic acid Total phenolic Litter

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

知识经济时代财务报表分析改革探析

引用

芜湖职业技术学院学报 2013年第4期15卷 21-24页

作者：王颖张同健骆园苏州物流中心有限公司苏州215121 江苏大学管理学院镇江212013

知识经济时代对传统的会计理论带来了迅猛的冲击,引发了会计领域深远的变革。会计报表分析是会计改革中最为艰巨而关键的环节。会计报表分析的改革分为三种趋向:基础性财务会计报表分析、功能性财务会计报表分析和前景性财务会计报表分... 详细信息

知识经济时代对传统的会计理论带来了迅猛的冲击,引发了会计领域深远的变革。会计报表分析是会计改革中最为艰巨而关键的环节。会计报表分析的改革分为三种趋向:基础性财务会计报表分析、功能性财务会计报表分析和前景性财务会计报表分析。会计报表分析改革的研究对将来的业务展开具有重要的理论启示。

关键词：知识经济会计报表分析知识资本财务比率股东权益变动表

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

Shell-model representations of the microscopic version of the Bohr-Mottelson collective model

引用

Communications in Theoretical Physics 2024年第8期76卷 79-90页

作者： H g ganev Joint Institute for Nuclear Research DubnaRussia Institute of Mechanics Bulgarian Academy of SciencesSofiaBulgaria

The structure of the irreducible collective spaces of the group Sp(12,R),which many-particle nuclear states are classified according to the chain Sp(12,R)⊃U(6)⊃SO(6)⊃SU_(pn)(3)⊗SO(2)⊃SO(3)of the proton-neutron symplectic model(PNSM),is considered in *** chain of the PNSM was recently shown to correspond to a microscopic shell-model version of the Bohr-Mottelson collective *** construction of the relevant shell-model representations of the Sp(12,R)group along this chain is considered for three nuclei with varying collective properties and from different mass *** is shown that the SU_(pn)(3)basis states of the Sp(12,R)representations belonging to the SO(6)irreps with seniorityυ≥υ0,withυ0 denoting the maximal seniority SO(6)irrep contained in the Sp(12,R)bandhead,are always Pauli allowed,but organized in a different way into different SO(6)*** is in contrast to the case of filling the levels of the standard three-dimensional harmonic oscillator and using the plethysm *** the SU_(pn)(3)multiplets withinυ<υ0 are not all Pauli forbidden,it is safe to discard *** results obtained in the present work are important for the practical application of the microscopic version of the Bohr-Mottelson collective model.

关键词： microscopic shell-model version of the Bohr-Mottelson model proton-neutron symplectic model Sp(12,R)dynamical algebra shell-model representations

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

Harmonics in the Squirrel Cage Induction Motor Analytic Calculation Part III: Influence on the Torque-speed Characteristic

引用

CES Transactions on Electrical Machines and Systems 2024年第1期8卷 86-102页

作者： g.Kovács the ganz Electric Works BudapestHungary

The harmonics that appear in the squirrel cage asynchronous machine have been discussed in great detail in the literature for a long time. However, the systematization of the phenomenon is still pending, so we made an attempt to fill this gap in the previous parts of our study by elaborating formulas for calculation of parasitic torques. It was a general demand among those who work in this field towards the author to verify his formulas with measurements. In the literature, it seems,only one detailed, purposeful series of measurements has been published so far, the purpose of which was to investigate the effect of the number of rotor slots on the torque-speed characteristic curve of the machine. The main goal of this study is to verify the correctness of the formulas by comparing them with the referred series of measurements. Relying on this, the expected synchronous parasitic torques were developed for the frequently used rotor slot numbers-as a design guide for the ***, together with our complete table for radial magnetic pull published in our previous work, the designer has all the principles, data and formulas available for the right number of rotor slots for his given machine and for the drive system. This brings this series of papers to an end.

关键词： Asynchronous parasitic torques Induction motor Squirrel cage rotor Space harmonics Synchronous parasitic torques

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：