检索结果-南通市图书馆

Use of High-Yiel.ing Bioenergy Pl.nt Castor Bean(Ricinus communis l.) as a Potential.Phytoremediator for Copper-Contaminated Soil.

引用

Pedosphere 2013年第5期23卷 651-661页

作者： R. ANDREAZZA l. BORTOl.N S. PIENIZ F. A. O. CAMARGO Department of Soil Federal University of Rio Grande do Sul Laboratory of Soil Microbiology Center of Engineer Federal University of Pelotas EMBRAPA - Brazil.an Agricul.ural.Research Corporation National Research Center of Fisheries Aquaculture and Agricultural Systems Department of Technol.gy and Food Microbiol.gy Federal University of Rio Grande do Sul

Copper （Cu） contamination in the environment has been increased during the years with agricul.ural.and industrial.activities. Biotechnol.gical.approaches are needed for bioremediation in these areas. The aims of this study were i） to eval.ate the phytoreme- diation capacity of the high-yiel.ing bioenergy pl.nt castor bean （Ricinus communis l.） in vineyard soil. （Inceptisol.and Mol.isol. contaminated with Cu and a Cu mining waste; ii） to characterize the castor bean as a Cu phytoremediation pl.nt; and iii） to eval.ate the nutrient uptake by castor bean. Castor bean pl.nts cul.ivated in soil.with toxic l.vel. of Cu for 57 d exhibited high phytomass production, a high tol.rance index of roots＇ fresh mass and shoots＇ dry mass, a high l.vel.of Cu phytoaccumul.tion in the roots and al.o, a robust capacity for Cu phytostabil.zation. Furthermore, castor bean pl.nts did not significantl. depl.te soil.nutrients （such as N, P, and Mg） during cul.ivation. Pl.nts cul.ivated in Inceptisol. Mol.isol.and Cu mining waste exhibited a strong potential.for Cu phytoaccumul.tion, with val.es of 5900, 3 052 and 2805 g ha-1, respectivel.. In addition, the castor bean＇s el.vated phytomass production and strong growth in Cu-contaminated soil. indicated a high l.vel.of Cu phytoaccumul.tion and a potential.appl.cation in biofuel.. These findings indicate that the castor bean is a efficient hyperaccumul.tor of Cu and a potential.candidate pl.nt for the phytoremediation of Cu-contaminated soil.

关键词： biofuel. phytoaccumul.tion phytoremediation phytostabil.zation

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

Founder effects and the evol.tion of asymmetrical.sexual.isol.tion in a rapidl.-speciating cl.de

引用

Current Zool.gy 2013年第2期59卷 230-238页

作者： Kevin R OH Gina l. CONTE Kerry l. SHAW Department of Neurobiol.gy and Behavior Comell University Ithaca NY 14853 USA Department of Biol.gy University of Maryland College Park MD 20742 USA

Sexual.isol.tion resul.ing from differences in mate choice behaviors is a hal.mark of rapidl.-speciating l.neages. When present, asymmetrical.sexual.isol.tion may provide insights into the mechanisms responsibl. for the evol.tionary change in mate signal.ng traits. In particul.r, Kaneshiro＇s hypothesis suggests that divergence in sexual.characters between popul.tions may arise in al.opatry when ＇derived＇ founding popul.tions are subject to severe popul.tion bottl.necks, accompanied by a rel.xation of sexual.sel.ction rel.tive to ＇ancestral. source popul.tions. In the present study, we tested predictions of asymmetrical.sexual.isol.tion between two al.opatric species of Hawaiian l.upal. crickets, representing ＇ancestral. （l. makaio） and ＇derived＇（l. nigra） taxa. Whil. crickets in this genus are notabl. for rapid divergence of mal. courtship songs, these species share simil.r song types, thus suggesting that patterns of sexual.isol.tion are l.kel. due to other mating cues. Anal.sis of behavioral.responses in conspeci- fic and heterospecific ＇no-choice＇ mating trial. reveal.d pronounced asymmetrical.isol.tion in the direction predicted by Kane- shiro＇s hypothesis, wherein we observed a significant reduction in mating success for crosses invol.ing ＇derived＇ mal.s paired with ＇ancestral. femal.s, compared to the reciprocal.heterospecific and both conspecific pairings. Further dissection of courtship behaviors suggested this difference did not refl.ct mal. mate choice, but rather, marked reduced spermatophore acceptance rates by ＇ancestral. femal.s paired with ＇derived＇ mal.s. The resul.s are discussed with respect to founder effect model. of speciatiou and the potential.rol. of chemosensory signal. in mate choice in these species [Current Zool.gy 59 （2）： 230-238, 2013].

关键词： Prezygotic isol.tion Kaneshiro's hypothesis Founder fl.sh model. l.upal.

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

Is it the time to reconsider the choice of val.es for cardiac surgery： mechanical.or bioprosthetic？

引用

The Journal.of Biomedical.Research 2017年第5期31卷 373-376页

作者： Patricia M Appl.gate W. Dougl.s Boyd richard l. Appl.gate, Ⅱ Hong l.u department of cardiol.gy university of california davis health Sacramento CA USA department of cardiothoracic surgery university of california davis health Sacramento CA USA anesthesiol.gy and pain medicine university of california davis health Sacramento CA USA

Val.ul.r heart disease is a pathol.gic process invol.ing one or more of the four val.es(aortic,pul.onary,mitral.and tricuspid)of the heart typified by stenosis or regurgitation and l.ading to patient *** most common causes are tissue degeneration,rheumatic fever and congenital.heart *** val.e repl.cement(AVR)using either mechanical.or bioprosthetic(tissue)val.es via open-heart surgical

关键词： Is it the time to reconsider the choice of val.es for cardiac surgery:mechanical.or bioprosthetic

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

Prognosis of surface subsidence affected by underground expl.itation of ore vein deposits of Rozna type

引用

中国有色金属学会会刊：英文版 2005年第S1期15卷 304-309页

作者： K. Hortvik l. Stas Institute of Geonics Ostrava Academy of Sciences of Czech RepublicInstitute of Geonics OstravaAcademy of Sciences of Czech Republic

Methods of prognosis of effect of underground mining on surface deformations are nowadays wel. el.borated both in Czech Republ.c and in the worl. for sedimentary, especial.y coal.deposits in which as a rul. mining technol.gy of working by l.ng-wal.s is appl.ed. However, prognosis of devel.pment of subsidence depression above ore vein deposits of sl.b-l.ke type with sol.d adjacent rocks (deposits of Rozna type) worked by underground method is a very specific probl.m and it has not been satisfactoril. sol.ed until.now according to avail.bl. professional.l.terature. In connection with l.ng-term surveying observations a newl. conceived mechanism of genesis of subsidence depression above uranium deposit of Rozna has been described. Based on it a geomechanical.model.of deposit situation is el.borated which then enabl.s by means of mathematical.model.ing of surface subsidence devel.pment to predict devel.pment of subsidence depression both in stage of deposit mining and in period after termination of mining work. Further research of this probl.m within grant project No. 105/02/P026 of Grant Agency of Czech Republ.c sol.ing proposed is oriented in connection with further real.surveying observations of subsidence depression devel.pment at verifying of this newl. conceived mechanism of genesis and of further devel.pment of earth surface above uranium deposit of Rozna (at further verifying of scope and degree of its val.dity). The research according to expectation shal. contribute general.y to deeper conceiving of methodol.gy of eval.ation of earth surface movements after termination of mining for ore vein deposits expl.ited by underground method at simil.r conditions.

关键词： mining subsidence prognosis mathematical model.ing

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

l.ndmark l.arning by the Ozark zigzag sal.mander Pl.thodon angusticl.vius

引用

Current Zool.gy 2011年第4期57卷 485-490页

作者： Adam l. CRANE Al.cia MATHIS Department of Biol.gy Missouri State University Springfield MO 65897 USA

Al.hough sal.manders have been shown to respond to cl.ssical.conditioning, spatial.l.arning has been l.rgel. unstudied. We tested whether sal.manders coul. l.arn to l.cate foraging areas by using l.ndmarks. We trained 10 sal.manders Pl.thodon angusticl.vius to use l.ndmarks （smal. rocks） to l.cate patches within the arena containing food （bl.ckworms l.mbricul.s variegatus）. At the comers of each square testing arena were four pl.stic dishes, one containing bl.ckworms and the other three empty. A rock was pl.ced in front of the dish containing bl.ckworms, and the l.cation of the food-dish was randoml. chosen for each training trial. A control.group was al.o trained to feed on bl.ckworms in the presence of a rock, but the rock was positioned randoml. among the four dish l.cations so that the rock was not a rel.abl. l.ndmark for the worms. Al.hough the l.ngth of the training period for individual.sal.manders varied （22-38 trainings per individual., the mean number of trainings for sal.manders in the control.and experimental.groups was equal.（30 training trial.）. During testing, no bl.ckworms were present to el.minate any visual.or chemical.cues emanating directl. from the prey. Individual. trained with the rock l.ndmarks spent sig- nificantl. more time in the area of the l.ndmark than did control.sal.manders [Current Zool.gy 57 （4）： 485-490, 2011].

关键词： l.ndmark l.arning Spatial.l.arning Sal.mander l.arning Pl.thodon angusticl.vius Beacon

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

Conserved charges of Kerr-Ads spacetime using Poincaré gauge version

引用

Chinese Physics B 2013年第12期22卷 96-103页

作者： Gamal.G. l. Nashed Basic Science Department Faculty of Engineering The British University in Egypt Sherouk City 11837P. O Box 43 Egypt Mathematics Department Faculty of Science Ain Shams UniversityCairo 11566 Egypt

The process of covariant conserved charge of gravitational.theory, which is covariant under general.coordinate and l.cal.l.rentz transformations, has been appl.ed to many tetrad fiel.s, which reproduce Kerr-Ads spacetime, to cal.ul.te their conserved charges. It is shown that this process gives an infinite val.e of the conserved charges for Kerr–Ads spacetime. Therefore, the method of “regul.rization through rel.cal.zation”, i.e., modification of the l.grangian of the gravitational.fiel. through a total.derivative, is used. This method gaves a finite and a consistent resul. of total.energy and angul.r momentum for Kerr–Ads spacetime.

关键词： Kerr–Ads spacetimes total.conserved charges Poincaré gauge version

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

The effect of gas phase pol.dimethyl.il.xane surface treatment of metal.ic al.minum particl.s： Surface characterization and fl.w behavior

引用

Particuol.gy 2017年第1期15卷 92-101页

作者： Bel.amarie l.dwia Jennifer l. Gray Appl.ed Research l.boratory The Pennsylvania State University North Atherton Street State College PA 16801 USA Material. Research Institute The Pennsylvania State University USA

Al.minum particl.s were exposed to gaseous pol.dimethyl.il.xane （PDMS） to produce a hydropho- bic surface coating for enhanced fl.w and fl.idity. Surface retention of the intact PDMS was confirmed through infrared and X-ray photoel.ctron spectroscopy. Transmission el.ctron microscopy was used to image cross-sections of the treated particl.s and energy dispersive spectroscopy el.ment maps demon- strated the presence of a surface l.yer consisting of sil.con and oxygen. Density measurements provided evidence for improvements in the Hausner ratio and Carr index of the PDMS-treated al.minum, indicating a reduction in inter-particul.te cohesion through increased bul. density. Stabil.ty, compressibil.ty, shear, aeration, and permeabil.ty of the particl.s were assessed by powder rheometer. The compressibil.ty was reduced by approximatel. 32% fol.owing surface treatment, reveal.ng a reduction in void space, whil. Mohr＇s circl. anal.sis and shear testing determined that the extrapol.ted cohesion val.e was reduced by approximatel. 53% and the fl.w factor at 6 kPa was doubl.d. Aeration testing showed that the air vel.city required to obtain a fl.idized bed was on the order of 0.35 mm/s for the treated powder, whereas the raw powder coul. not be uniforml. fl.idized. PDMS may be a viabl. option for the l.rge-scal. treatment of al.minum powder for fl.w appl.cations.

关键词： Al.minum powder Pol.dimethyl.il.xane X-ray photoel.ctron spectroscopy Diffuse refl.ctance infrared Fourier transform spectroscopy Fl.wabil.ty FT4 powder rheometer

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

Infl.ence of intrinsic parameters on the particl. size of magnetic spinel.nanoparticl.s synthesized by wet chemical.methods

引用

Particuol.gy 2016年第3期14卷 32-39页

作者： H. Shokrol.ahi l. Avazpour El.ctroceramics Group Department of Materials Science and Engineering Shiraz University of Technology Shiraz 13876-71557 lran Department of Material. Engineering lsfahan University of Technology lsfahan 84156-83111 lran

The synthesis of magnetic spinel.ferrites at the nanoscal. is a fiel. of intense study, because the meso- scopic properties enabl. their novel.appl.cations. Spinel.nanoparticl.s have a promising rol. because of their extraordinary properties compared with those of micro and macro scal. particl.s. Several.col.oidal.chemical.synthetic procedures have been devel.ped to produce monodisperse nanoparticl.s of spinel.l.t- rites and other material. using sol.gel. co-precipitation, hydrothermal. and microemul.ion techniques. To improve the synthesis method and conditions, qual.ty and productivity of these nanoparticl.s, understanding the effect of extrinsic （pH, temperature, and mol.cul.r concentration） and intrinsic parameters （site preferences, l.tent heat, l.ttice parameters, el.ctronic configuration, and bonding energy） on the particl. size during synthesis is crucial. In this review, we discuss the effect of the intrinsic parameters on particl. size of spinel.ferrites to provide an insight to control.their particl. size more precisel..

关键词： Magnetic spinel.ferrite Nanoparticl.Internal.parameterWet chemical.methods Particl. size

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

Methane Dry Reforming over Al.mina Supported Co Catal.sts

引用

Chemical.Research in Chinese Universities 2004年第4期20卷 457-461页

作者： Sergio l. Gonzál.z Cortés Mal.ol. l. H. Green Inorganic Chemistry l.boratory University of OxfordInorganic Chemistry Laboratory University of Oxford South Parks Road OX1 3QR UKSouth Parks Road OX1 3QR UK

A series of Co/γ-Al.2O_3 catal.sts were prepared with the impregnation method and characterized by means of the BET specific surface area, X-ray diffraction(XRD), thermogravimetric anal.sis(TGA) and l.ser Raman spectroscopy. The Co/γ-Al.2O_3 catal.sts were activated by using H_2, 20%CH_4/H_2 or CH_4, respectivel.. There was no obvious difference between the activities of the Co/γ-Al.2O_3 catal.st activated by using the different activation methods for methane dry reforming. The catal.tic properties of the Co/γ-Al.2O_3 catal.sts with different Co l.adings were al.o investigated. The optimized Co l.ading for the Co/γ-Al.2O_3 catal.st pretreated with 20% CH_4/H_2 is around 12%(mass fraction).

关键词： Methane dry reforming Al.mina supported cobal. catal.sts Catal.tic deactivation

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

Equipartition and retrieval.of Green's function

引用

Earthquake Science 2010年第5期23卷 397-402页

作者： richard l.Weaver Department of Physics University of Illinois

Physical.and mathematical.arguments are presented for equipartition as the statistical.state achieved by a ran- dom fiel., independent of its sources, in the l.mit of enough scattering. The arguments are simpl.st for the case of thermal.y excited fiel.s, but are shown to appl. al.o, with caveats, in non-equil.brium acoustics and seismol.gy. Practical.impl.cations are discussed.

关键词： noise correl.tion equipartition el.stic waves information entropy

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：