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Ecological variation along the salinity gradient in the Baltic Sea Area and its consequences for reproduction in the common goby

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Current Zoology 2018年第2期64卷 259-270页

作者： Isabel MuCK Katja u. HEuBEL Department of Biology University of Tuibingen Auf tier Morgenstelle 28 72076 Tuibingen Germany Institute for Zoology Ecological Research Station Rees University of Cologne Grietherbusch 3a D-46459 Rees Germany Tvarminne Zoological Station University of Helsinki J.A. Palmenin tie 260 10900 Hanko Finland

Although it has become clear that sexual selection may shape mating systems and drive speciation, the potential constraints of environmental factors on processes and outcomes of sexual selection are largely unexplored. Here, we investigate the geographic variation of such environmental factors, more precisely the quality and quantity of nest resources （bivalve shells） along a salinity gradient in the Baltic Sea Area （Baltic Sea, Sounds and Belts, and Kattegat）. We further test whether we find any salinity-associated morphological differences in body size between populations of common gobies Pomatoschistus microps, a small marine fish with a resource-based mat- ing system. In a geographically expansive field study, we sampled 5 populations of P. microps occurring along the salinity gradient （decreasing from West to East） in the Baltic Sea Area over 3 consecutive years. Nest resource quantity and quality decreased from West to East, and a correla- tion between mussel size and male body size was detected. Population density, sex ratios, mating- and reproductive success as well as brood characteristics also differed between populations but with a less clear relation to salinity. With this field study we shed light on geographic variation of distinct environmental parameters possibly acting on population differentiation. We provide insights on relevant ecological variation, and draw attention to its importance in the framework of context-dependent plasticity of sexual selection.

关键词： aquatic ecology body size environmental gradient nest availability nesting resources sexual selection.

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Facet selective etching of Au microcrystallites

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Nano Research 2015年第9期8卷 2925-2934页

作者： Gangaiah Mettela and Giridhar u. Kulkarni Thematic unit of Excellence on Nanochemistry and Chemistry and Physics of Materials unit Jawaharlal Nehru Centre for AdvancedScientific Research (JNCASR) Jakkur P.O. Bangalore 560 064 India

High-symmetry crystals exhibit isotropic properties. Inducing anisotropy, e.g., by facet selective etching, is considered implausible in face-centered cubic （FCC） metals, particularly gold, which, in addition to being an FCC, is noble. We report for the first time the facet selective etching of Au microcrystals obtained in the form of cuboctahedra and pentagonal rods from the thermolysis of a gold- organic precursor. The selective etching of {111} and {100} facets was achieved using a capping method in which tetraoctylammonium cations selectively cap the {111} facets while Br- ions protect the {100} facets. The exposed facets are oxidized by O2/C1-, yielding a variety of interesting geometries. The facet selective etching of the Au microcrystallites is governed only by the nature of the facets; the geometry of the microcystallite does not appear to play a significant role. The etched surfaces appear rough, but a closer examination reveals well-defined corrugations that are indexable to high hkl values. Such surfaces exhibit enhanced Raman activity.

关键词： gold,microcrystallites,facet selective eapping

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新疆西南天山木扎尔特河一带低压泥质麻粒岩岩石学特征、独居石u-Th-Pb定年及其地质意义

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岩石学报 2009年第9期25卷 2271-2280页

作者：苟龙龙张立飞 G0u Peking univ Key Lab Orogen Belts & Crustal Evolut Minist Educ Sch Earth & Space Sci Beijing 100871 Peoples R China

古南天山洋闭合过程中,由于洋壳俯冲产生的岛弧岩浆作用加热大陆地壳,在新疆西南天山木扎尔特一带形成了一套低压高温泥质麻粒岩相变质岩石。本文用Theriak-Domino热力学软件对该套岩石中的堇青石榴夕线石黑云母片麻岩和含夕线石堇青石... 详细信息

古南天山洋闭合过程中,由于洋壳俯冲产生的岛弧岩浆作用加热大陆地壳,在新疆西南天山木扎尔特一带形成了一套低压高温泥质麻粒岩相变质岩石。本文用Theriak-Domino热力学软件对该套岩石中的堇青石榴夕线石黑云母片麻岩和含夕线石堇青石榴黑云母片麻岩进行了岩石学相平衡计算研究,得到它们峰期变质的温压条件分别是:T=630～674℃,P=5.2～5.5kbar和T=645～684℃,P=5.4～5.7kbar。并采用独居石Th-u-Pb电子探针定年方法,对样品WQ006中的3颗独居石进行了原位年龄测定(38个分析点),得到2组等时线年龄,分别是376±8Ma和280±8Ma(2σ)。结合独居石的岩相学特征,提出了新疆西南天山低压高温麻粒岩相峰期变质作用的时代为280±8Ma,而376±8Ma(2σ)可能为原沉积岩的原岩/成岩年龄。表明西南天山洋壳开始俯冲发生在晚古生代,进一步证明了西南天山造山带俯冲碰撞发生在晚二叠纪之后的观点。

关键词：新疆西南天山木扎尔特低压泥质麻粒岩相岩石学特征独居石定年地质意义 southwestern Tianshan region monazite dating China South Tianshan 黑云母片麻岩 electron microprobe 南天山洋峰期变质 phase equilibria

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Nucleon Effective Mass in Asymmetric Nuclear Matter within Extended Brueckner Approach

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Chinese Physics Letters 2012年第4期29卷 47-50页

作者： GAN Sheng-Xin ZuO Wei u.Lombardo Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000 Graduate School of Chinese Academy of Sciences Beijing 100049 Department of Physics and Astrophysics Catania UniversityVia Santa Sofia 64I-95123Italy

The on-shell properties of the nucleon effective mass in asymmetric nuclear matter are investigated in the framework of an extended Brueckner-Hartree-Fock (BHF) *** proton and neutron effective masses in neutron-rich nuclear matter are predicted by including both the effect of ground state correlations and the threebody force (TBF) rearrangement *** this framework,the neutron effective mass is predicted *to be larger than the proton one in neutron-rich nuclear matter,i.e.,m*n ≥ m**** effect of ground state correlations turns out to be dominated at low densities and it leads to a strong enhancement of the effective *** TBF rearrangement contribution becomes predominant over the effect of ground state correlations at high densities and it reduces remarkably the absolute magnitude of the isospin splitting of the neutron and proton effective masses in neutron-rich matter at high densities.

关键词： rearrangement absolute Hartree

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Multiple drug resistance and bacterial infection

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Asian Pacific Journal of Tropical Medicine 2008年第2期1卷 76-82页

作者： Asad u Khan Interdisciplinary Biotechnology unit Aligarh Muslim UniversityAligarh 202002India

Drug resistance is becoming a great problem in developing countries due to excessive use and misuse of antibiotics. The emergence of new pathogenic strains with resistance developed against most of the antibiotics which may cause,difficult to treat *** understand the current scenario in different mode of infection is most important for the clinicians and medical *** article summarized some common infections and antibiotic resistance pattern found among these pathogens.

关键词： Drug resistance Bacteria Infection

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Cross Section of Heavy Ion Reaction （14.5 MeV/u） ^132Xe ＋ Bi

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Chinese Physics Letters 2006年第3期23卷 572-575页

作者： G. Sher M.I. Shahzad M. Hussain M. A. Rana E. u. Khan Physics Research Division PINSTECH P.O Nilore Islamabad Pakistan Department of Physics University of the Punjab Lahore Pakistan

We investigate the cross section of the heavy ion reaction （14.5 MeV/u） ^132Xe ＋ Bi by using a CR-39 plastic track detector. The target-detector assembly is exposed at uNILAC beam facility of GSI, Germany. After etching under appropriate etching conditions, the detector is scanned for multipronged events produced as a result of interactions of projectile ions with target atoms. The elastic events are separated from binary events and used for the determination of the quarter-point angle. The quarter-point angle obtained is used to determine the total reaction cross section. The total experimental reaction cross section is determined by using statistics of inelastic events of two-pronged and higher multiplicity events. The experimental reaction cross sections determined by using elastic and inelastic data observed in the reaction under study are found to be in good agreement with the theoretically calculated value of reaction cross section using a sharp cutoff model.

关键词： SEQuENTIAL FISSION COuLOMB BARRIER TRACK DETECTORS NuCLEAR SCATTERING PB-208

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Approximation properties for the genuine modi ed Bernstein-Durrmeyer-Stancu operators

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Applied Mathematics(A Journal of Chinese universities) 2020年第4期35卷 468-478页

作者： CAI Qing-bo ulku Dinlemez Kantar Bayram Cekim School of Mathematics and Computer Science Quanzhou Normal UniversityQuanzhou 362000China Department of Mathematics Faculty of ScienceGazi UniversityBesevler AnkaraTurkey

In this paper,we study on the genuine modified Bernstein-Durrmeyer-Stancu operators Gn(f,x)and investigate some approximation properties of ***,we present a Voronovskaja type theorem for these *** also give some graph... 详细信息

关键词： genuine modi ed Bernstein-Durrmeyer-Stancu operators Voronovskaja type approximation theorem rate of convergence modulus of continuity

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Imminence:Cryptocurrency addiction and public health

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Asian Pacific Journal of Tropical Medicine 2022年第10期15卷 429-430页

作者： Mehmet uÇAR MuşAlparslan university Department of Public HealthMuşTurkey

Investing in cryptocurrencies has become quite popular among investors as well as young people,students,and a large segment of society in recent years[1].The number of investors is increasing day by day,while its impact on daily life is becoming more and more visible[1,2].Cryptocurrency investments have become among the most popular discussion topics in any environment[2].The financial data has shown us that the number of such investors has exceeded 320 million,while the cryptocurrency market reached close to 4 trillion dollars in *** leading cryptocurrency trading countries are the uS with 46 million.

关键词： has while quite

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Synthesis of Nano-sized Barium Titanate Powder by Solid-state Reaction between Barium Carbonate and Titania

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Journal of Materials Science & Technology 2007年第5期23卷 655-658页

作者： u.Manzoor D.K.Kim Department of Physics COMSATS Institute of Information TechnologyIslamabadPakistan Department of Materials Science and Engineering Korea Advanced Institute of Science and Technology(KAIST)DaejeonKorea

Size control of BaTiO3 in solid-state reaction between BaCO3 and TiO2 was demonstrated by varying the size of TiO2 and milling conditions of BaCO3. The smaller TiO2 particles had higher surface area, resulting in faster initial reaction. The mechanically milled BaCO3 particles accelerated the diffusion process and decreased the calcinations temperature. It can be deduced from the results that the size control is possible and nano-sized BaTiO3 particles with about 60 nm can be synthesized by using the conventional solid-state reaction between BaCO3 and TiO2.

关键词： Barium tltanate Mechanical milling Solid-state reaction Nano particles

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A note on the unsteady flow of a fractional Maxwell fluid through a circular cylinder

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Acta Mechanica Sinica 2012年第2期28卷 308-314页

作者： M.Athar A.u.Awan Corina Fetecau Abdus Salam School of Mathematical Sciences GC University Lahore68-BNew Muslim Town LahorePakistan

In this note the velocity field and the adequate shear stress corresponding to the unsteady flow of a frac- tional Maxwell fluid due to a constantly accelerating circular cylinder have been determined by means of the Laplace and finite Hankel transforms. The obtained solutions satisfy all imposed initial and boundary conditions. They can easily be reduced to give similar solutions for ordinary Maxwell and Newtonian fluids. Finally, the influence of pertinent param- eters on the fluid motion, as well as a comparison between models, is underlined by graphical illustrations.

关键词： Fractional Maxwell fluid Velocity field Shear stress Exact solutions

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