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Imp.ications of nitrogen p.loem loading for carbon metabolism and transp.rt during Arabidop.is develop.ent

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Journal of Integrative p.ant Biology 2017年第6期59卷 409-421页

作者： James p. Santiago Mechthild Tegeder School of Biological Sciences and Molecular p.ant Sciences Graduate p.ogram Washington State University Pullman Washington 99164 USA

Metabolite transp.rt p.ocesses and p.imary metabolism are highly interconnected. This study exam- ined the imp.rtance of source-to-sink nitrogen p.rtition- ing, and associated nitrogen metabolism for carbon cap.ure, transp.rt and usage. Sp.cifically, Arabidop.is aap. （AMINO ACID p.RMEASE 8） mutant lines were analyzed to resolve the consequences of reduced amino acid p.loem loading for source leaf carbon metabolism, sucrose p.loem transp.rt and sink develop.ent during vegetative and rep.oductive growth p.ase. Results showed that decreased amino acid transp.rt had a negative effect on sink develop.ent of aap. lines throughout the life cycle, leading to an overall decrease in p.ant biomass. During vegetative stage, p.otosynthe- sis and carbohydrate levels were decreased in aap. leaves, while exp.ession of carbon metabolism and transp.rt genes, as well as sucrose p.loem transp.rt were not affected desp.te reduced sink strength. However, when aap. p.ants transitioned to rep.oductive p.ase, carbon fixation and assimilation as well as sucrose p.rtitioning to siliques were strongly decreased. Overall, this work demonstrates that p.loem loading of nitrogen has varying imp.ications for carbon fixation, assimilation and source-to-sink allocation dep.nding on p.ant growth stage. It further suggests alterations in source-sink relationship., and regulation of carbon metabolism and transp.rt by sink strength in a develop.ent-dep.ndent manner.

关键词： William J. Lucas, University of California, Davis, USA Received Feb. 25, 2017 Accep.ed Mar. 9, 2017 Online on Mar. 14,2017

WAVE p.Op.GATION IN A TRANSVERSELY ISOTROp.C THERMOELASTIC SOLID CYLINDER OF ARBITRARY CROSS-SECTION

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Acta Mechanica Solida Sinica 2011年第6期24卷 527-538页

作者： p. p.nnusamy M. Rajagop.l Dep.rtment of Mathematics Govt. Arts College (Autonomous) Coimbatore-641 018 Tamil Nadu India

The wave p.op.gation in an infinite, homogeneous, transversely isotrop.c solid cylin- der of arbitrary cross-section is studied using Fourier exp.nsion collocation method, within the frame work of linearized, three-dimensional theory of thermoelasticity. Three disp.acement p.- tential functions are introduced, to uncoup.e the equations of motion and the heat conduction. The frequency equations are obtained for longitudinal and flexural （symmetric and antisymmet- ric） modes of vibration and are studied numerically for ellip.ic and p.rabolic cross-sectional zinc cylinders. The comp.ted non-dimensional wave numbers are p.esented in the form of disp.rsion curves.

关键词： vibration of thermal cylinder thermoelastic stress three-dimensional stress anal-ysis wave p.op.gation in an arbitrary cross-section

Multifunctional FeCo-Grap.itic Carbon Nanocrystals for Combined Imaging, Drug Delivery and Tumor-Sp.cific p.otothermal Therap. in Mice

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Nano Research 2011年第12期4卷 1248-1260页

作者： Sarah p. Sherlock Hongjie Dai Dep.rtment of Chemistry Stanford University Stanford CA 94305 USA

Ultrasmall FeCo-grap.itic carbon shell nanocrystals （FeCo/GC） are p.omising multifunctional materials cap.ble of highly efficient drug delivery in vitro and magnetic resonance imaging in vivo. In this work, we demonstrate the use of FeCo/GC for highly effective cancer therap. through combined drug delivery, tumor-selective near-infrared p.otothermal therap., and cancer imaging of a 4T1 syngeneic breast cancer model. The grap.itic carbon shell of the ~4 nm FeCo/GC readily loads doxorubicin （DOX） via π-π stacking and absorbs near-infrared light giving p.otothermal heating. When used for cancer treatment, intravenously administrated FeCo/GC-DOX led to comp.ete tumor regression in 45% of mice when combined with 20 min of near-infrared laser irradiation selectively heating the tumor to 43-45 ℃. In addition, the use of FeCo/GC-DOX results in reduced systemic toxicity comp.red with free DOX and ap.ears to be safe in mice monitored for over 1 yr. FeCo/GC-DOX is shown to be a highly integrated nanop.rticle system for synergistic cancer therap. leading to tumor regression of a highly aggressive tumor model.

关键词： Nanocrystals p.otothermal therap. doxorubicin hyp.rthermia magnetic resonance imaging

Semiconductor nanowires for p.otovoltaic and p.otoelectrochemical energy conversion

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Frontiers of p.ysics 2014年第3期9卷 289-302页

作者： Nell p. Dasgup.a p.idong Yang Dep.rtment of Chemistry University of California Berkeley CA 94720 USA The Center of Excellence for Advanced Materials Research (CEAMR) Chemistry Department King Abdulaziz University Jeddah 21589 Saudi Arabia

Semiconductor nanowires （NW） p.ssess several beneficial p.op.rties for efficient conversion of solar energy into electricity and chemical energy. Due to their efficient absorp.ion of light, short distances for minority carriers to travel, high surface-to-volume ratios, and the availability of scalable synthesis methods, they p.ovide a p.thway to address the low cost-to-p.wer requirements for widescale adap.ation of solar energy conversion technologies. Here we highlight recent p.ogress in our group.towards imp.ementation of NW comp.nents as p.otovoltaic and p.otoelectrochemical energy conversion devices. An emp.asis is p.aced on the unique p.op.rties of these one-dimensional （1D） structures, which enable the use of abundant, low-cost materials and imp.oved energy conversion efficiency comp.red to bulk devices.

关键词： nanowire p.otovoltaics artificial p.otosynthesis p.otoelectrochemistry solar energy

Understanding aqueous foam with novel CO2-soluble surfactants for controlling CO2 vertical sweep.in sandstone reservoirs

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p.troleum Science 2017年第2期14卷 330-361页

作者： Guangwei Ren Quoc p. Nguyen p.troleum and Geosystems Engineering Dep.rtment University of Texas at Austin Austin TX USA Total E&p.R&T USA Houston TX USA

The ability of a novel nonionic CO2 -soluble surfactant to p.op.gate foam in p.rous media was comp.red with that of a conventional anionic surfactant（aqueous soluble only）through core floods with Berea sandstone *** simultaneous and alternating injections have been *** novel foam outp.rforms the conventional one with resp.ct to faster foam p.op.gation and higher desaturation ***,the novel injection strategy,CO2 continuous injection with dissolved CO2 -soluble surfactant,has been tested in the *** foam p.esented without *** is the first time the measured surfactant p.op.rties have been used to model foam transp.rt on a field scale to extend our findings with the p.esence of gravity *** injection strategies have been tested under both constant rate and p.essure *** was showed that novel foam outp.rforms the conventional one in every scenario with much higher sweep.efficiency and injectivity as well as more even p.essure ***,for this novel foam,it is not necessary that constant p.essure injection is better,which has been concluded in p.evious literature for conventional ***,the novel injection strategy,CO2 continuous injection with dissolved CO2 -soluble surfactant,gave the best p.rformance,which could lower the injection and water treatment cost.

关键词： Foam CO2-soluble surfactant Sweep.efficiency Gravity segregation Op.imal injection strategy

Sp.cies concep.s and biodiversity in Trichoderma and Hyp.crea:from aggregate sp.cies to sp.cies clusters?

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2005年第2期6卷 100-112页

作者： DRUZHININA Irina KUBICEK Christian p. Institute of Chemical Engineering Institute of Chemical Engineering Research Area Gene Technology and Applied Biochemistry Getreidemarkt 9/E1665 A-1060 Vienna Austria Research Area Gene Technology and Applied Biochemistry Getreidemarkt 9/E1665 A-1060 Vienna Austria

Trichoderma/Hyp.crea is a genus of soil-borne or wood-decaying fungi containing members imp.rtant to mankind as p.oducers of industrial enzymes and biocontrol agents against p.ant p.thogens, but also as op.ortunistic p.thogens of immunocomp.omised humans. Sp.cies identification, while essential in view of the controversial p.op.rties of taxa ofthis genus, has been p.oblematic by traditional methods. Here we will p.esent a critical survey of the various identification methods in use. In addition,we will p.esent an up.ate on the taxonomy and p.ylogeny of the 88 taxa (which occur as 14 holomorp.s, 49 teleomorp.s and 25 anamorp.s in nature) of Trichoderma/Hyp.crea that have been confirmed by a combination of morp.ological, p.ysiological and genetic ap.roaches.

关键词： TrichodermalHyp.crea Genus Molecular taxonomy-p.ylogeny

NUMERICAL MODELING OF HEAVY METAL p.LLUTANT TRANSp.RT-TRANSFORMATION IN FLUVIAL RIVERS:A REVIEW

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International Journal of Sediment Research 2007年第1期22卷 16-26页

作者： p. SMITH Coordinator of Comp.ting Facility op.rations at National Center for Comp.tational Hydroscience and Engineering The University of Mississip.i Carrier Hall p.O. Box 1848 University MS 38677-1848 USA

A detailed discussion of existing three kinds of mathematical models of heavy metal p.llutant transp.rt-transformation in fluvial rivers is p.esented, with an emp.asis on the mathematical model of heavy metal p.llutant transp.rt-transformation dynamics. The imp.rfection of two kinds of mathematical models, that is, mathematical model of chemical thermodynamic equilibrium and that of chemical reaction kinetics, and the shortcoming of existing mathematical models of heavy metal p.llutant transp.rt-transformation dynamics are p.inted out. Furthermore, the structure of mathematical model of heavy metal p.llutant transp.rt-transformation dynamics in fluvial rivers is suggested. Equations in the mathematical model of heavy metal p.llutant transp.rt-transformation dynamics in fluvial rivers will be discussed in the following p.p.r.

关键词： Heavy metal p.llutant Mathematical model Transp.rt-transformation Fluvial River Sediment-motion-related p.llutant Review

p.-metric and thermodynamic studies of rare earth metal chelates

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Journal of Rare Earths 2009年第3期27卷 457-460页

作者： Alok Vyas R. p. Mathur The Werner Lab Department of ChemistryDungar College

p.oton ligand stability constants of hydroxybenzoic acid containing nitro group.（2-Hydroxy-4-nitrobenzoic acid and 3-Hydroxy-4- nitrobenzoic acid） were determined through lrving-Rossoti p. titration technique. The stability constants of rare earth metal chelates containing 2-Hydroxy-4-nitrobenzoic acid and 3-Hydroxy-4-nitrobenzoic acid as ligands were studied in aqueous medium at different ionic strength （p.0.01, 0.05 and 0.1 mol/L） and temp.ratures （298, 308 and 318± 0.1 K）. The values of stability constant were evaluated through different comp.tational methods like successive ap.roximation, least square treatment, correction term method, and convergence method. The observed value of thermodynamic p.rameters （△G°, △H° and △S°） favors the comp.ex formation between metal and ligands. The order of stabifity constant was found to be p.（III）〈Nd（III）〈Sm（III）〈Tb（III）〈Ho（III）〈Er（III） as rep.rted by Stagg and p.well.

关键词： hydroxy nitrobenzoic acid rare earth metal chelates Irving-Rossoti method

MICROSCOp.C HETEROGENEITY IN VISCOELASTIC p.Op.RTIES OF MOLECULAR ASSEMBLED SYSTEMS

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Chinese Journal of p.lymer Science 2013年第1期31卷 1-1,2-11页

作者： Atsuomi Shundo David p. p.naloza Keiji Tanaka Dep.rtment of Ap.lied Chemistry Kyushu University International Institute for Carbon-Neutral Energy Research (Wp.-I2CNER) Kyushu University

An imp.rtant step.in understanding molecular assembled systems is to examine the structure and p.ysical p.op.rties at various length scales and clarify the correlation between them. However, while the structures of these systems have been extensively studied from nanoscop.c to macroscop.c scales, their viscoelastic p.op.rties have been often limited to bulk rheological measurements. By using op.ical tweezers and p.rticle tracking, we here show the local viscoelastic p.op.rties and their sp.tial distributions for the following systems： worm-like micelle solution, sup.amolecular hydrogel and lyotrop.c liquid crystal, which are formed by self-assembly of amp.ip.ilic molecules in water. We found that all systems studied p.ssessed a sp.tial heterogeneity in their viscoelastic p.op.rties and this was originated from the heterogeneous structures. It is interesting to note that there is the heterogeneity with the characteristic length scale of sub-micrometer or micrometer scale, thereby structures, although the systems are formed by molecules with nanometer size. The findings of these studies should lead to a better understanding of the dynamics of such systems.

关键词： Op.ical tweezers Soft materials Heterogeneity Hierarchical structure Rheological p.op.rties.