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Progress in Natural science:Materials International 2012年第4期22卷 318-325页

作者： s.Afroukhteh C.Dehghanian M.Emamy University of Tehran College of EngineeringSchool of Metallurgical and Materials EngineeringTehranIran

Ni-P electroless coating was applied on low carbon steel with the incorporation of different amounts of nano Al2O3 powder (ranging from 3g/l to 30 g/l) in electroless bath. Corrosion properties and microstructures of the coating were studied. The dispersion stability of alumina colloidal particles stabilized by polymeric (non-ionic) surfactants in an electroless bath was also investigated. The surface morphology and the relevant structure were evaluated by scanning electron microscopy (sEM) and X-ray diffraction (XRD). Corrosion behavior of the coated steel was evaluated by electrochemical impedance spectroscopy (EIs) and polarization techniques. The results showed that increasing alumina concentration not only changed the surface morphology, but also promoted the corrosion resistance. Addition of surfactants has an indirect effect on the amount of the incorporated particles. Meanwhile, in the presence of surfactant, corrosion resistance of Ni-P coating containing even a small quantity of alumina was improved since a stabilized bath was obtained.

关键词： Electroless coating Alumina Corrosion resistance surfactant

Thinking about U.s.-China Relations

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Peace 2014年第2期 59-60页

作者： Robert s.Ross Boston College

Observers have long expected that the rise of China would challenge U.s.-China cooperation and regional *** typical assertion is that"power transitions"cause *** is an overly-simplistic casual *** cause of war cannot ... 详细信息

关键词： cooperation statement challenge transitions equall

Genotype × environmental interactions for analyzing adaptability and stability in different clones of Dalbergia sissoo Roxb.

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Journal of Forestry Research 2012年第1期23卷 65-74页

作者： A.Kumar A.Bhatt s.Ravichandran V.Kumar s.Dobhal Division of Genetics and Tree Propagation Forest Research InstituteDehradun 248195India Directorate of Rice Research HyderabadAndhra Pradesh 528133India state Forest Department HoshiarpurPunjab 146001India

In total 36 superior clones of Dalbergia sissoo Roxb., screened from 300 selections conducted in natural and growing range of India and Nepal, were multiplied using single nodal cuttings and estab- lished to evaluate genotypexenvironmental interactions for adaptability and stability at the age of 30 months in three geographical locations in the state of Punjab, India. Clone 124 had maximum adaptability and stability （bi = 1.04） to perform exceedingly well over the locations. Clones 36 and 1 were stable with mean regression coefficient of 0.84 and 1.22, respectively. Nonetheless, clone 4 1 performed exceedingly well for all the characters to attain maximum population mean, and the perform- ance varied substantially across the locations. Therefore, clone 41 was considered as productive but non-adaptive clone. Though some of the clones were sensitive to sites, 14 clones for height, 16 for collar diameter, 12 for DBH and 7 for volume were relatively un-sensitive with higher regression coefficient. Nonetheless, clone 124 was the most stable with average bi value of 1.04 and productive, which could play an important role in future breeding and commercial deployment of stable and produc- tive planting stock of Dalbergia sissoo.

关键词： Dalbergia sissoo Roxb. GxE interactions stability parame-ters adaptability superior genotypes

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“文艺青年”负屃

艺术品鉴 2024年第1期 55-55页

作者： s-Rong 不详

八子负屃(fù xì),身似龙,雅好斯文,盘绕在石碑头顶。在石碑上,我们经常可以看到被提名为“龙九子”的兄弟二人——前文所述“龙六子”赑屃与“龙八子”负赑,它们一个是碑下龙龟,一个是碑上小龙。负赑在不同学者中有不同的叫法,如李东... 详细信息

八子负屃(fù xì),身似龙,雅好斯文,盘绕在石碑头顶。在石碑上,我们经常可以看到被提名为“龙九子”的兄弟二人——前文所述“龙六子”赑屃与“龙八子”负赑,它们一个是碑下龙龟,一个是碑上小龙。负赑在不同学者中有不同的叫法,如李东阳称其为“屃赑”,谢肇淛称“负屃”,陆容唤“螭虎”,《菽园杂记》云:“螭虎,其形似龙,性好文彩,故立于碑文上。”屃赑是所有“龙子”中最像龙的。

关键词：《菽园杂记》文艺青年谢肇淛兄弟二人李东阳石碑赑屃碑文

Characterization of the Tomato Prosystemin Promoter:Organ-specific Expression,Hormone specificity and Methyl Jasmonate Responsiveness by Deletion Analysis in Transgenic Tobacco Plants

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Journal of Integrative Plant Biology 2012年第1期54卷 15-32页

作者： Hamlet Avilés-Arnaut John Paul Délano-Frier Center of Research and Advanced studies (Cinvestav) at Irapuato:Unit for Plant Biotechnology and Genetic Engineering

Tomato systemin is a bioactive peptide that regulates the systemic activation of wound-responsive genes. It is released from its 200 amino acid precursor called prosystemin. Initial tissue-localization and hormone-induced expression assays indicated that the tomato prosystemin gene （sIPs） accumulates mainly in floral tissues and in response to exogenous abscisic acid and methyl jasmonate （MeJA） treatments, respectively. Later, the promoter regions of the Ps gene in tomato （solanum lycopersicum L. cv. Castlemart）, pepper （Capsicum annuum） and potato （solanum tuberosum） were isolated and an in silico analysis of the sIPs promoter revealed an over-representation of stress- and MeJA-responsive motifs. A subsequent 5＇ deletion analysis of the sIPs promoter fused to the/^-glucuronidase reporter （GUs） gene showed that the -221 to ＋40 bp proximal sIPs promoter region was sufficient to direct the stigma, vascular bundle-specific and MeJA-responsive expression of GUs in transgenic tobacco plants. Important ***-specific, light- and MeJA-responsive cis-elements were also present in this region. These findings provide relevant information regarding the transcriptional regulation mechanisms of the sIPs promoter operating in transgenic tobacco plants. They also suggest that its Ussue-specificity and inducible nature could have wide applicability in plant biotechnology.

关键词： cis-regulatory elements flower specific jasmonic acid methyl jasmonate promoter analysis prosystemin wound-responsive genes.

ON sOLVABILITY OF A BOUNDARY VALUE PROBLEM FOR A NONHOMOGENEOUs BIHARMONIC EQUATION WITH A BOUNDARY OPERATOR OF A FRACTIONAL ORDER

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Acta Mathematica scientia 2014年第6期34卷 1695-1706页

作者： A.s.BERDYsHEV A.CABADA B.Kh.TURMETOV Department of Applied Mathematics and Informatics Kazakh National Pedagogical University named after AbaiAlmatyKazakhstan Departmento de Analise Matematica Facultade de Matematicas University of Santiago de CompostelaSantiago de Compostela Spain Khoja Ahmet Yasawi International Kazakh-Turkish University Kazakhstan

This paper is concerned with the solvability of a boundary value problem for a nonhomogeneous biharmonic equation. The boundary data is determined by a differential operator of fractional order in the Riemann-Liouvill... 详细信息

关键词： biharmonic equation boundary value problem fractional derivative the RiemannLiouville operator

Landscape changes have greater effects than climate changes on six insect pests in China

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science China(Life sciences) 2016年第6期59卷 627-633页

作者： Zihua Zhao Hardev s sandhu Fang Ouyang Feng Ge state Key Laboratory of Integrated Management of Pest Insects and Rodents Institute of Zoology Chinese Academy of Sciences Department of Entomology College of Plant Protection China Agricultural University Everglades Research and Education Center Institute of Food and Agricultural Sciences University of Florida

In recent years, global changes are the major causes of frequent, widespread outbreaks of pests in mosaic landscapes, which have received substantial attention worldwide. We collected data on global changes(landscape and climate) and economic damage caused by six main insect pests during 1951–2010 in China. Landscape changes had significant effects on all six insect pests. Pest damage increased significantly with increasing arable land area in agricultural landscapes. However, climate changes had no effect on damage caused by pests, except for the rice leaf roller(Cnaphalocrocis medinalis Guenee) and armyworm(Mythimna separate(Walker)), which caused less damage to crops with increasing mean temperature. Our results indicate that there is slight evidence of possible offset effects of climate changes on the increasing damage from these two agricultural pests. Landscape changes have caused serious outbreaks of several species, which suggests the possibility of the use of landscape design for the control of pest populations through habitat rearrangement. Landscape manipulation may be used as a green method to achieve sustainable pest management with minimal use of insecticides and herbicides.

关键词： biological control cropland expansion global warming mosaic landscape pest damage

Provenance discrimination and source-to-sink studies from a dryland fluvial regime:An example from Kachchh,western India

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International Journal of sediment Research 2014年第1期29卷 99-109页

作者： s.P.PRIZOMWALA Nilesh BHATT N.BAsAVAIAH Institute of seismological Research Department of Geology The M.S.University of Baroda Indian Institute of Geomagnetism

Tracing the sediment delivery from its source terrain to its ultimate sink envisage multiple factors that play a vital role in understanding present day erosional *** accomplish this,it is significant to distinguish the variable end-members contributing to the *** findings from the study of dryland coastal fluvial regime in Kachchh(Western India),which is one of the end members contributing to the Gulf of Kachchh coast(partial sink) and finally to the Arabian sea(ultimate sink) have been presented ***-proxy sediment provenance proxies such as grain-size,clay minerals,geochemistry and magnetic minerals have been employed to evaluate the provenance discriminating characteristics of the Kachchh dryland fluvial system and factors influencing *** results of different proxies indicate that the provenance signatures of uplands are quite characteristic with magnetic susceptibility(χ) values of smectite(s)/kaolinite(K) ratio between 0.26 and *** middle reaches show marked increase in magnetic mineral concentration with χ values(140×10-7m3kg-1)and s/K ratio(4.92),while the estuarine tract shows χ values(80×10-7m3kg-1),s/K ratio(1.90) and,characteristic heavy minerals(*** minerals),probably reflect the interplay between land and sea *** sources of sediments within catchment scale were identified,viz.,upland sedimentary rocks(Juran and Bhuj Formation sandstone-shale) and middle reaches volcanic(Deccan Trap Formation basalt) *** present study draw cautions in provenance of sediment discrimination in areas influenced by Deccan basalt that has the overwhelming sediment delivery and a comparatively subdued effects of other provenance *** studied proxies of mineralogy of clays,magnetic minerals and geochemistry of heavy and major elements serve as the potential for fingerprint of sediment source regions and hence behold a strong position in source to sink studies globally.

关键词： Provenance source-to-sink Heavy minerals Clay minerals Kachchh

Two-dimensional numerical and eco-toxicological modeling of chemical spills

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Frontiers of Environmental science & Engineering 2009年第2期3卷 178-185页

作者： suiliang HUANG Yafei JIA sam s.Y.WANG Numerical simulation Group for Water Environment Key Laboratory of Pollution Processes and Environmental Criteria of Ministry of EducationTianjin Key Laboratory of Environmental Remediation and Pollution ControlCollege of Environmental Science and EngineeringNankai UniversityTianjin 300071China National Center for Computational Hydroscience and Engineering The University of MississippiOxfordMS 38677USA

The effects of chemical spills on aquatic nontarget organisms were evaluated in this *** on a review of three types of current eco-toxicological models of chemicals,i.e.,ACQUATOX model of the Us-EPA,Hudson River Model of PCBs,and critical body residual(CBR)model and dynamic energy budget(DEBtox)model,this paper presents an uncoupled numerical ecotoxicological *** transport and transformation of spilled chemicals were simulated by a chemical transport model(including flow and sediment transport),and the mortalities of an organism caused by the chemicals were simulated by the extended threshold damage model,*** to extreme scarcity of data,this model was applied to two hypothetical cases of chemical spills happening upstream of a *** analysis and simulated results indicated that this model is capable of reasonably predicting the acute effects of chemical spills on aquatic ecosystems or organism killings.

关键词： chemical spills acute effects aquatic ecosystem eco-toxicological modeling

A semi-relativistic treatment of spinless particles subject to the nuclear Woods-saxon potential

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Chinese Physics C 2013年第6期37卷 12-17页

作者： M.Hamzavi s.M.Ikhdair A.A.Rajabi Department of Basic sciences Shahrood Branch Islamic Azad University Physics Department Near East University Department of Physics An-Najah National University Physics Department Shahrood University of Technology

By applying an appropriate Pekeris approximation to deal with the centrifugal term, we present an approximate systematic solution of the two-body spinless salpeter （ss） equation with the Woods-saxon interaction potential for an arbitrary/-state. The analytical semi-relativistic bound-state energy eigenvalues and the corresponding wave functions are calculated. Two special cases from our solution are studied： the approximated schrsdinger- Woods-saxon problem for an arbitrary/-state and the exact s-wave （l=0）.

关键词： spinless salpeter equation usual Woods-saxon potential Nikiforov-Uvarov method