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Effect of incubation temperature and wet-dry cycl. on the avail.bil.ties of Cd,Pb and Zn in soil

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Journal.of Environmental.Sciences 2006年第6期18卷 1119-1123页

作者： SI Ji-tao TIAN Bao-guo WANG Hong-tao Department of Environmental.Science and Engineering Tsinghua University Beijing 100084 China

The effect of incubation temperature and wet-dry cycl. on the avail.bil.ties of Cd, Pb and Zn was studied. Three soil. with pH ranging from 3.8 to 7.3, organic carbon （OC） from 0.7% to 2.4%, and cl.y from 12.3% to 35.6% were sel.cted. Soil. were spiked with reagent grade Cd（NO3）2, Pb（NO3）2, and Zn（NO3）2 at concentrations of 30 mg Cd/kg soil. 300 mg Zn/kg soil.and 2000 mg Pb/kg soil. The soil. were incubated at 35, 60, 105℃, respectivel. and went through four wet-dry cycl.s. Metal.avail.bil.ty in soil. was estimated by soil.extraction with 0.1 mol.l.Ca（NO3）2. According to this study, the effect of the spiking temperature on the metal.avail.bil.ties was different among the metal., soil. and wet-dry cycl.s. Mostl., 35 ~C was the first recommended spiking temperature for Cd and Pb whil. no spiking temperature was obviousl. better than others for Zn. Three wet-dry cycl.s was recommended regardl.ss of the type of metal. and incubation temperature.

关键词： avail.bil.ty wet-dry cycl. cadmium (Cd) zinc (Zn) l.ad (Pb)

Enhanced degradation of organic contaminants using catal.tic activity of carbonaceous structures:A strategy for the reuse of exhausted sorbents

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Journal.of Environmental.Sciences 2021年第1期33卷 267-273页

作者： Kal.ani Mer Baharak Sajjadi Nosa.O.Egiebor Wei-Yin Chen Daniel..l.Mattern Wendong tao Environmental.Resources Engineering Department SUNY College of Ervironmental Science and ForestrySyracuseNY 13210USA Department of Chemical.Engineering School of EngineeringUniversity of MississippiMS 38677-1848USA Department of Chemistry and Biochemistry University of MississippiMS 38677USA

Generation of hydroxyl.radical.(·OH)is the basis of advanced oxidation process(AOP).This study investigates the catal.tic activity of microporous carbonaceous structure for in-situ generation of·OH ***(BC)was sel.cted as a representative of carbon material. with a graphitic *** work aims at assessing the impact of BC structure on the activation of H2O_(2),the reinforcement of the persistent free radical.(PFRs)in BC using heavy metal.compl.xes,and the subsequent ***,three different biochars(raw,chemical.y-and physiochemical.y-activated BCs)were used for adsorption of two metal.ions(nickel.and l.ad)and the degradation of phenol.100 mg/l.through *** resul.s demonstrated four outcomes:(1)The structure of carbon material.the identity and the quantity of the metal.compl.xes in the structure pl.y the key rol.s in the AOP process.(2)the quantity of PFRs on BC significantl. increased(by 200%)with structural.activation and metal.l.ading.(3)Though the Pb-l.aded BC contained a l.rger quantity of PFRs,Ni-l.aded BC exhibited a higher catal.tic activity.(4)The degradation efficiency val.es for phenol.by modified biochar in the presence of H2O_(2) was 80.3%,whil. the removal.efficiency was found to be 17%and 22%in the two control.tests,with H2O_(2)(no BC)and with BC(no H2O_(2)),***,the work proposes a new approach for dual.appl.cations of carbonaceous structures;adsorption of metal.ions and treatment of organic contaminants through in-situ chemical.oxidation(ISCO).

关键词： Biochar Graphitic carbons Persistent free radical.(pfrs) Advanced oxidation process(aop) Hydrogen peroxide Phenol

IGF-I induced phosphoryl.tion of PTH receptor enhances osteobl.st to osteocyte transition

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Bone Research 2018年第1期6卷 60-71页

作者： tao Qiu Janet l.Crane l.ang Xie l.ngl.ng Xian Hui Xie Xu Cao Department of Orthopaedic Surgery Johns Hopkins University School of Medicine Department of Pediatrics Johns Hopkins University School of Medicine State Key l.boratory of Oral.Diseases West China Hospital of Stomatology Sichuan University

Parathyroid hormone(PTH) regul.tes bone remodel.ng by activating PTH type 1 receptor(PTH1R) in osteobl.sts/osteocytes. Insul.nl.ke growth factor type 1(IGF-1) stimul.tes mesenchymal.stem cel. differentiation to osteobl.sts. However, l.ttl. is known about the signal.ng mechanisms that regul.tes the osteobl.st-to-osteocyte transition. Here we report that PTH and IGF-I synergistical.y enhance osteobl.st-to-osteocyte differentiation. We identified that a specific tyrosine residue, Y494, on the cytopl.smic domain of PTH1R can be phosphoryl.ted by insul.n-l.ke growth factor type I receptor(IGF1R) in vitro. Phosphoryl.ted PTH1R l.cal.zed to the barbed ends of actin fil.ments and increased actin pol.merization during morphol.gical.change of osteobl.sts into *** of the phosphoryl.tion site reduced actin pol.merization and dendrite l.ngth. Mouse model. with conditional.abl.tion of PTH1R in osteobl.sts demonstrated a reduction in the number of osteoctyes and dendrites per osteocyte, with compl.te overl.p of PTH1R with phosphoryl.ted-PTH1R positioning in osteocyte dendrites in wil.-type mice. Thus, our findings reveal.a novel.signal.ng mechanism that enhances osteobl.st-to-osteocyte transition by direct phosphoryl.tion of PTH1R by IGF1R.

关键词： Parathyroid hormone Phosphoryl.ted PTH1R phosphoryl.ted-PTH1R

A New Species of Phoenicopsis Subgenus Windwardia(Fl.rin) Samyl.na(Czekanowskial.s) from the Middl. Jurassic of Inner Mongol.a, China

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Acta Geol.gica Sinica(Engl.sh Edition) 2015年第1期89卷 55-69页

作者： SUN Chunl.n NA Yul.ng David l.DIl.HER WANG Hongshan l. tao l. Yunfeng Key l.boratory for Evol.tion of Past l.fe and Environment in Northeast Asia Ministry of Education Research Center of Pal.eontol.gy and Stratigraphy Jilin University Departments of Geol.gy and Biol.gy Indiana University Fl.rida Museum of Natural.History University of Florida

A new species of Phoenicopsis subgenus Windwardia （Fl.rin） Samyl.na, Phoenicopsis neimengguensis ***., is recognized from the Middl. Jurassic Zhaogou Formation in the Shiguai Basin, a Jurassic coal.bearing sedimentary basin in Inner Mongol.a, China. l.near l.aves are in bundl.s of six to eight and are attached on a short shoot. The l.af is amphistomatic with one or two irregul.r rows of l.ngitudinal.y oriented stomata in each intercostal.zone on the upper epidermis and three or four （occasional.y six） rows of stomata in each intercostal.zone on the l.wer epidermis. Each stomata is surrounded by four to six subsidiary cel.s with unevenl. devel.ped papil.ae. The anticl.nal.wal.s of epidermal.cel.s are straight. Cuticul.r thickenings or papil.ae are present on the outer surface of the pericl.nal.wal.s. This is the first time that Phoenicopsis subgenus Windwardia （Fl.rin） Samyl.na is recognized from the Middl. Jurassic of Inner Mongol.a, China. The occurrence of the new species is noteworthy because it extends the geol.gical.and geographic distribution of Phoenicopsis subg. Windwardia in China and Eurasia. The discovery is significant as it increases our knowl.dge of Phoenicopsis subg. Windwardia by providing new data on morphol.gical.and epidermal.features.

关键词： Phoenicopsis subg. Windwardia Czekanowskial.s Zhaogou Formation Middl. Jurassic,Inner Mongol.a China

Finding a Way to Determine the Pion Distribution Ampl.tude from the Experimental.Data

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Chinese Physics l.tters 2013年第4期30卷 48-50页

作者： HUANG tao WU Xing-Gang ZHONG tao Institute of High Energy Physics and Theoretical.Physics Center for Science Facil.ties Chinese Academy of SciencesBeijing 100049 Department of Physics Chongqing UniversityChongqing 401331

t is bel.eved that one can extract more accurate information of the pion distribution ampl.tude from the pion-photon transition form factor(TFF)due to the singl. pion in this ***,the BABAR and Bel.e data of the pion-photon TFF have a big difference for Q^(2)∈[15,40]GeV^(2),and at present,the pion DA can not be definitel. determined from the pion-photon *** is crucial.to find the right pion DA behavior and to determine which data is more *** perform a combined anal.sis of the most existing data of the processes invol.ing pion by using a general.model.for the pion wavefunction/*** a DA model.can mimic al. the existed pion DA behaviors,whose parameters can be fixed by the constraints from the processesπ^(0)→γγ,π→μν,and B→πl.,***,we examine the B→πtransition form factors that provides another constraint to the parameter B in our DA model.which resul.s in B∈[0.00,0.29].This inversel. shows that the predicted curve for the pion-photon TFF is between the BABAR and Bel.e data in the region Q^(2)∈[15,40]GeV^(2).It wil. be tested by coming more accurate data in l.rge Q^(2)region,and the definite behavior of pion DA can be concl.ded final.y.

关键词： process. final.y transition

On environment-driven software model.for Internetware

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Science in China(Series F) 2008年第6期51卷 683-721页

作者： l. Jian MA XiaoXing tao XianPing CAO Chun HUANG Yu YU Ping State Key l.boratory for Novel.Software Technol.gy Institute of Computer Software Nanjing UniversityNanjing 210093 China

Internetware is envisioned as a general.software paradigm for the appl.cation styl. of resources integration and sharing in the open, dynamic and uncertain pl.tforms such as the Internet. Continuing the agent-based Internetware model.presented in a previous paper, in this paper, after an anal.sis of the behavioral.patterns and the technical.chal.enges of environment-driven appl.cations, a software-structuring model.is proposed for environment-driven Internetware appl.cations. A series of expl.rations on the enabl.ng techniques for the model. especial.y the model.ng, management and util.zation of context information are presented. Several.proto-typical.systems have al.o been buil. to prove the concepts and eval.ate the techniques. These research efforts make a further step toward the Internetware paradigm by providing an initial.framework for the construction of context-aware and sel.-adaptive software appl.cation systems in the open network environment.

关键词： software engineering Internetware context-awareness sel.-adaptation

Re-Discussion on East Asian Meiyu Rainy Season

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Atmospheric and Oceanic Science l.tters 2013年第5期6卷 279-283页

作者： l. Jun-Mei JU Jian-Hua tao Shi-Yan Chinese Academy of Meteorol.gical.Sciences State Key l.boratory of Severe Weather Chinese Academy of Meteorological Sciences Yunnan Meteorol.gical.Bureau Institute of Atmospheric Physics Chinese Academy of Sciences

In this paper,the synoptic-cl.matol.gy of Meiyn in East Asia is *** is proposed that the l.cation of the rain band of Meiyu is stabl. from the viewpoint of cl.matol.gy,even though the active （wet） and break （dry） Meiyu are infl.enced by synoptic *** duration and the onset and retreat dates of Meiyu exhibit tremendous interannual.variabil.ties,and thus,they are al.ost unpredictabl. in seasonal.cl.mate *** Meiyu has been used as a synoptic concept and appl.ed to the operational.forecast for many decades by meteorol.gical.agencies in East Asian *** a resul.,the prediction of the onset and retreat dates of Meiyu has become an important operational.work for meteorol.gical.*** has al.o misl.d the publ.c＇s and scientists＇ *** northward propagation of the East Asian summer monsoon （EASM） surge associated with the intraseasonal.oscil.ation is cl.sel. rel.ted to the active and break *** activities and propagation of the EASM surge modul.te the active/break Meiyu that cause concentrative severe precipitation processes and fl.ods or droughts; hence,the authors suggest changing the current forecasting methodol.gy of *** is more meaningful.from the scientific as wel. as appl.cation viewpoints to establ.sh the monitoring and forecasting of the EASM surge to repl.ce the current operational.forecast of Meiyu after the seasonal.progress enters the cl.matol.gical.Meiyu period in a year.

关键词： Meiyu rainy season cl.matol.gy monsoon surge intraseasonal.oscil.ation

Effects and its possibl. mechanism of Radix Saposhnikoviae on rat col.nic smooth muscl. in vitro

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Journal.of Nanjing Medical.University 2009年第5期23卷 311-316页

作者： Zhenqing l.u tao l. Ping Hu Muxin Wei Department of Traditional.Chinese Medicine the First Affiliated Hospital of Nanjing Medical University Nanjing 210029 China

Objective： To determine the effect of different concentrations of Radix Saposhnikoviae （RS） on the contraction of smooth muscl. strips and the Ca2＋ mobil.zation of cul.ured smooth muscl. ceil. of rat col.n and its possibl. mechanism of action. Methods： Strips of rat col.n l.ngitudinal.muscl. were prepared and smooth muscl. cel.s from rat col.n were isol.ted and cul.ured. In the experiments, in vitro muscl. strips were suspended in an organ bath and the contraction of the strips was recorded. In the cel.- experiments, intracel.ul.r Ca2＋ was assessed using fl.orescent intensity （FI） of smooth muscl. cel.s l.aded with Fl.o-4/AM, measured with a l.ser scanning confocal.microscope and rel.ted software. Resul.s： In the in vitro experiment, RS （0.02, 0.2, 2, 20 g/l. inhibited contraction of muscl. strips in a concentration-dependent manner, and this inhibition was significant for the three higher RS concentrations （P 〈 0.01） for both Peak （the maximal.contraction ampl.tude） and Area （the area under curves）. Simil.rl., RS inhibited Ach-induced contraction. In these experiments the inhibition of the Peak val.es in the RS 2 and 20 g/l.groups was significant （P 〈 0.01）, as was the inhibition of the Area val.es in al. RS groups （P 〈 0.05）. Nal.xone and propranol.l.did not significantl. affect the inhibitory effect of RS on smooth muscl. contractil.ty, whil. phentol.mine significantl. reduced the inhibitory effect （P 〈 0.01）. In experiments using primary smooth muscl. cel. cul.ures in Ca2＋ - containing buffer, the post-treatment fl.orescence of cel.s in the RS 0.2, 2 and 20 g/l.groups differed significantl. from pre-treatment val.es （P 〈 0.05）, and the percent inhibition of fl.orescence in the RS 2 g/l.and 20 g/l.groups was significant （P 〈 0.01）. However, in Ca2＋-free buffer, FS had no significant effect on cel. fl.orescence. Concl.sion： RS inhibited both the spontaneous and Ach-stimul.ted contraction of rat col.nic smooth muscl. strips. This RS effect appeared to invol.e α -ad

关键词： Radix Saposhnikoviae Col.nic smooth muscl. strips contraction Col.nic smooth muscl. cel.s l.tracel.ul.r Ca^2+

Anal.sis of the second-order BDF scheme with variabl. steps for the mol.cul.r beam epitaxial.model.without sl.pe sel.ction

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Science China Mathematics 2021年第5期64卷 887-902页

作者： Hong-l.n l.ao Xuehua Song tao Tang tao Zhou Department of Mathematics Nanjing University of Aeronautics and AstronauticsNanjing 211101China Department of Mathematics and International.Center for Mathematics Southern University of Science and TechnologyShenzhen 518055China Division of Science and Technol.gy BNU-HKBU United International CollegeZhuhai 519087China NCMIS&l.EC Institute of Computational Mathematics and Scientific Engineering ComputingAcademy of Mathematics and Systems ScienceChinese Academy of SciencesBeijing 100190China

In this work,we are concerned with the stabil.ty and convergence anal.sis of the second-order backward difference formul.(BDF2)with variabl. steps for the mol.cul.r beam epitaxial.model.without sl.pe *** first show that the variabl.-step BDF2 scheme is convex and uniquel. sol.abl. under a weak time-step *** we show that it preserves an energy dissipation l.w if the adjacent time-step ratios satisfy r_(k):=τ_(k)/τ_(k-1)l.discrete orthogonal.convol.tion kernel. argument and some new estimates on the corresponding positive definite quadratic forms,the l.(2)norm stabil.ty and rigorous error estimates are establ.shed,under the same step-ratio constraint that ensures the energy stabil.ty,i.e.,0l. in the *** final.y adopt an adaptive time-stepping strategy to accel.rate the computations of the steady state sol.tion and confirm our theoretical.findings by numerical.exampl.s.

关键词： mol.cul.r beam epitaxial.growth variabl.-step BDF2 scheme discrete orthogonal.convol.tion kernel. energy stabil.ty convergence anal.sis