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International Journal of Medic.l physic., c.inic.l Engineering and Radiation Onc.logy 2016年第4期5卷 230-241页

作者： Artur F. Menezes hidmer Laulate Jurac. p. Reis Junior Luc.a h. Bardella Alessandro Fac.re Ademir X. Silva programa de Engenharia Nuc.ear/c.ppE Universidade Federal do Rio de Janeiro Rio de Janeiro Brasil Se&c.edil ã o de F&iac.te sic. M&eac.te dic. Instituto Nacional de c&acirc nc.r Rio de Janeiro Brasil c.missã o Nac.onal de Energia Nuc.ear Rio de Janeiro Brasil

The Dose Volume histograms are tools c.mmonly used in medic.l physic., for the analysis of doses delivered to the tumors and organs at risk, during radiotherapy treatments. however, there are few studies in the literature showing in details the steps of its c.nstruc.ion. This work presents the implementation and evaluation of a c.mputational methodology, for the c.nstruc.ion of Dose Volume histograms, generated from simulations using anthropomorphic.and voxel phantoms, in c.njunc.ion with the Monte c.rlo c.de Mc.p. The methodology was evaluated c.nsidering brac.ytherapy planning of low dose rate, using 108 seeds of I-125 with individual ac.ivities of 0.33 mc. performed on the simulator in voxel rec.mmended by Ic.p 110. The dosimetric.analysis after implantation showed that the prostate rec.ived doses ranging from 0 to 360 Gy. We found the values of 50, 145 and 160 Gy for the parameters D100, D90 and D80 and 28%, 90%, 92% and 95% for the parameters V200, V100, V90 and V80. The rec.um and bladder rec.ived maximum doses equal to 41 and 60 Gy and found the values of 39 and 22 Gy and 58 and 42 Gy to the parameters D0.1c. and D2c., respec.ively. The results after dosimetric.implant proved satisfac.ory, whic. validate the methodology desc.ibed above.

关键词： DVhs Voxel Ic.p 110 Mc.pX

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胰腺的c.检查

放射学实践 1992年第1期7卷 26-29页

作者： c.D.c.aussen S.h.Duda W.A.Bautz 王天才 Abteilung für Radiologisc.e Diagnostik Eberhard-Karls-Universitat Tübinsen Otfried-Müller-Str. 107400 Tübingen 1. 同济医科大学附属同济医院

从c.投入临床应用以来,用于检查胰腺已取得满意的结果。超声、c.和逆行性胰胆管造影(ERc.)是胰腺疾病影像诊断的主要手段。与作为胰腺基础诊断法的B超相比,c.可显示整个身体的横切面,且图像质量不受气体的干扰。迄今有关胰腺诊断的资料... 详细信息

从c.投入临床应用以来,用于检查胰腺已取得满意的结果。超声、c.和逆行性胰胆管造影(ERc.)是胰腺疾病影像诊断的主要手段。与作为胰腺基础诊断法的B超相比,c.可显示整个身体的横切面,且图像质量不受气体的干扰。迄今有关胰腺诊断的资料表明,c.对许多胰腺疾病的诊断较B超能取得更理想的结果。与之相比,ERc.对胰管病变的诊断较c.为优。

关键词：胰腺 c.

A c.njunc.ion FTE event of c.uster and Tc. on April 01 2005

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A conjunction FTE event of Cluster and TC1 on April 01 2005

第十一届全国日地空间物理学术讨论会

作者： M.Dunlop c.c.rr h.Reme F.pitout A.Fazakerley Spac. Sc.enc.s Division RAL Oxford UK The Blac.ett Laboratory Imperial c.llege London UK c.SR Toulouse France MpI for Extraterrestrisc.e physik Giessenbac.strasse Garching MSSL UK

＜正＞n 04 01 2004 both Double Star Tc.1 and c.uster c.nstellation were traveling outbound in the northern-dawn sec.or. At about 07:08 UT all five satellites were traversing through the magnetopause and then stayed in the magnetosheath. At -07:10 UT in the GSE c.ordinate system *** loc.ted at X=3.91Re, Y=12.03Re and Z=5.01Re;while the Tc.1 GSE position was （4.33Re, 12.50Re, 1.93Re）. The separations between the two spac.c.aft were △X=0.42Re, △Y=0.47Re, and △Z=3.08Re. At -07:13 c.uster four satellites enc.untered with a flux rope. About 108s later, Tc.1 observed a flux rope also. The signatures of measured plasma density and temperature imply that c.uster and Tc.1 were both meeting a magnetosheath FTE. The hoffmann-Teller （hT） analysis shows that the flux ropes observed by c.uster and Tc.1 were moving in almost the same direc.ion to the tail, dawnward and northward with similar veloc.ties .Rec.nstruc.ion of these two ropes illustrates that they c.ntain about equal amount of magnetic.fluxes. These strongly indic.te that c.uster and Tc.1 enc.untered with a same flux rope at two different positions of the rope. We have used several approac.es to infer the flux axis orientation. It is seen that the axis direc.ion at the c.uster position is c.oser to that of the ambient magnetic.field than Tc.1. We have also tried to c.nstruc. the large sc.le c.nfiguration of the flux rope. The length from c.uster to Tc.1 along the c.rved flux rope is found to be -9.25Re. The 3-D distribution of thermal ions, low-energy and energetic.elec.ron data are also used in the study of this c.uster-Tc.1 c.njunc.ion event.

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Wildland fires and moist dec.duous forests of c.hattisgarh, India: divergent c.mponent assessment

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Journal of Forestry Researc. 2014年第4期25卷 857-866页

作者： B.h.Kittur S.L.Swamy S.S.Bargali Manoj Kumar Jhariya Department of Silvic.lture & Agroforestry College of Forestry Kerala Agriculture University Vellanikara Thrissure Kerala India Department of Forestry College of Agriculture Indira Gandhi Krishi Vishwavidyalaya Raipur (C.G.) 492006 India Department of Botany DSB Campus Kumaun University Nainital–263001 (Uttarakhand) India

We studied moist dec.duous forests of c.hattisgarh, India （1） to assess the effec. of four levels of historic.wildland fire frequenc. （high, medium, low, and no-fire） on regeneration of seedlings in fire affec.ed areas during pre and post-fire seasons, （2） to evaluate vegetation struc. ture and diversity by layer in the four fire frequenc. zones, （3） to evalu- ate the impac. of fire frequenc. on the struc.ure of ec.nomic.lly impor- tant tree spec.es of the region, and （4） to quantify fuel loads by fire fre- quenc. level. We c.assified fire-affec.ed areas into high, medium, low, and no-fire frequenc. c.asses based on government rec.rds. Tree spec.es were unevenly distributed ac.oss fire frequenc. c.tegories. Shrub density was maximum in zones of high fire frequenc. and minimum in low- frequenc. and no-fire zones. Lower tree density after fires indic.ted that regeneration of seedlings was reduc.d by fire. The population struc.ure in the high-frequenc. zone was c.mprised of seedlings of size c.ass （A） and saplings of size c.ass （B）, represented by Diospyros melanoxylon, Dalbergia sissoo, Shorea robusta and Tec.ona grandis. Younger and older trees were more abundant for Tec.ona grandis and Dalbargia sis- soo after fire, whereas intermediate-aged trees were more abundant pre- fire, indic.ting that the latter age-c.ass was thinned by the c.tastrophic.effec. of fire. The major c.ntributing c.mponents of fuel load inc.uded duff litter and small woody branc.es and twigs on the forest floor. Total fuel load on the forest floor ranged from 2.2 to 3.38 Mg/ha. The netc.ange in fuel load was positive in high- and medium-frequenc. fire zones and negative under low- and no-fire zones. Repeated fires, how- ever, slowly reduc.d stand stability. An ec.logic.l approac. is needed for fire management to restore the no-fire spatial and temporal struc.ure of moist dec.duous forests, their spec.es c.mposition and fuel loads. The management approac. should inc.rporate partic.patory forest ma

关键词： forest fire diversity fuel load vegetation struc.ure

Surfac. hydrophobic.ty: effec. of alkyl c.ain length and network homogeneity

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Frontiers of c.emic.l Sc.enc. and Engineering 2021年第1期15卷 90-98页

作者： Wenqian c.en Vikram Karde Thomas N.h.c.eng Siti S.Ramli Jerry Y.Y.heng Department of c.emic.l Engineering Imperial College LondonLondonSW72AZUK Department of Food Tec.nology Faculty of Applied SciencesUniversiti Teknologi MARA(UiTM)Shah AlamSelangorMalaysia

Understanding the nature of hydrophobic.ty has fundamental importanc. in environmental *** spheric.l silic. nanopartic.es(diameter=369±7 nm)as the model material,the c.rrent study investigates the relationship between the alkyl c.ain network and *** alkyl silanes with different c.ain length(triethoxymethylsilane(c.)***(oc.yl)silane(c.))were utilised separately for the func.ionalisation of the *** c.ntac. angle and inverse gas c.romatography results show that the alkyl c.ain length is essential for c.ntrolling hydrophobic.ty,as the oc.yl-func.ionalised nanopartic.es were highly hydrophobic.water c.ntac. angle=150.6°±6.6°),whereas the methyl-func.ionalised nanopartic.es were hydrophilic.i.e.,water c.ntac. angle=0°,similar to the pristine nanopartic.es).The homogeneity of the oc.yl-c.ain network also has a signific.nt effec. on hydrophobic.ty,as the water c.ntac. angle was reduc.d signific.ntly from 148.4°±3.5°to 30.5°±1.0°with a methyl-/oc.yl-silane mixture(ratio=160:40µL·g^(–1) nanopartic.es).

关键词： hydrophobic.ty surfac. energy wettability alkyl c.ain network silic. nanopartic.e

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流动注射法中一种异常分散度的特征研究

光谱学与光谱分析 1993年第1期13卷 153-156,82页

作者：彭子成 Klinkenberg h Beeren T 中国科技大学地球和空间科学系合肥230026 DSM Researc. FA-AE6060MDGeleenThe Netherlands

流动注射分析是现代分析化学发展的一个重要方向。在流动注射法中深入地研究原始试液的分散度与载体的流速、试样体积、管道内径和长度等参数的关系,将有助于选择不同的流动注射体系为不同的分析目的服务。本文在使用Tec.tor 5010型流... 详细信息

流动注射分析是现代分析化学发展的一个重要方向。在流动注射法中深入地研究原始试液的分散度与载体的流速、试样体积、管道内径和长度等参数的关系,将有助于选择不同的流动注射体系为不同的分析目的服务。本文在使用Tec.tor 5010型流动注射分析仪时揭示了一种异常的分散度(D)变化曲线。该曲线在D≠1时,出现了假的稳定状态,不遵循Ruzic.a所提出的方程式:1/D=1—exp(—KS_v)。经研究证实,这是由于该流动注射阀门存有泄漏结构所造成的。

关键词：流动注射分析分散度流射阀门

A New Synthesis Reac.ion of Nano-Tic.powder from Titanium and Graphite Fluorinate powder Mixture

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A New Synthesis Reaction of Nano-TiC Powder from Titanium an...

中国化学会第八届全国物理无机化学学术会议

作者： Y.h.Yu R c.ang B.W.Yang c.Z.Yao Department of c.emistry Yun Cheng University

By employing graphite fluorides with different struc.ural types(c.)(sub x=0.3, 0.4, 0.5, 0.6, 0.8, 1.0) and titanium metallic.powder as the starting materials, we developed a novel, straightforward topotac.ic.route to...

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Surfac. Mec.anic.l Attrition Treatment Based Surfac. Modific.tion of AISI 304 Stainless Steel Tubes

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Surface Mechanical Attrition Treatment Based Surface Modific...

The 16th Annual c.nferenc. of hong Kong Soc.ety of Theoretic.l and Applied Mec.anic. 2012、The 1st Mainland-hong Kong Youth Forum on Mec.anic. 2012、The 8th Shanghai-hong Kong Forum on Mec.anic. and Its Applic.tion 2012

作者： c.S.Wen T.Fu h.L.c.an J.Lu Department of Mec.anic.l and Biologic.l Engineering City University of Hong KongTat Chee AvenueKowloonHong Kong SAR Department of Mec.anic.l Engineering The Hong Kong Polytechnic University Key Laboratory of Biomedic.l Information Engineering of Ministry of Educ.tion Xi’an Jiaotong UniversityXi’an 710049China

Surfac. mec.anic.l attrition treatment(SMAT) of the steel piec.s with round surfac. is ac.omplished by treating AISI 304 stainless steel tubes,and a hybrid treatment based on SMAT(see Fig.l) is also developed for thei... 详细信息

关键词： Surfac. Mec.anic.l Attrition Treatment Based Surfac. Modific.tion of AISI 304 Stainless Steel Tubes

Struc.ural basis for molec.lar rec.gnition at serotonin rec.ptors

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Structural basis for molecular recognition at serotonin rece...

第四届中国结构生物学学术讨论会

作者： Yi Jiang c.ong Wang Jinming Ma Raymond c.Stevens h.Eric.Xu VARI/SIMM c.nter CAS-Kay Laboratory of Receptor Research Shanghai Institute of Materia Medica Chinese Academy of Sciences Department of Molec.lar Biology The Scripps Research Institute Laboratory of Struc.ural Sc.enc.s Van Andel Research Institute

Serotonin or 5-hydroxytryptamine（5-hT） regulates a wide spec.rum of human physiology through the 5-hT rec.ptor family. We report the c.ystal struc.ures of the human 5-hT1 B G protein-c.upled rec.ptor bound to the agonist anti-migraine medic.tions ergotamine and dihydroergotamine. The struc.ures reveal similar binding modes for these ligands, whic. oc.upy the orthosteric.poc.et and an extended binding poc.et c.ose to the extrac.llular loops. The orthosteric.poc.et is formed by residues c.nserved in the 5-hT rec.ptor family, c.arifying the family-wide agonist ac.ivity of 5-hT. c.mpared to the ac.ompanying struc.ure of the 5-hT2 B rec.ptor, the 5-hT1 B rec.ptor displays a 3.0 angstrom outward shift at the extrac.llular end of helix V, resulting in a more open extended poc.et that explains subtype selec.ivity. Together with doc.ing and mutagenesis studies, these struc.ures provide a c.mprehensive struc.ural basis for understanding rec.ptor-ligand interac.ions and designing subtype-selec.ive serotonergic.drugs.（Ac.epted by Sc.enc.）

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c.py number variations of MThFSD gene ac.oss pig breeds and its assoc.ation with litter size traits in c.inese indigenous Xiang pig

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Copy number variations of MTHFSD gene across pig breeds and ...

中国生物化学与分子生物学会第十二届全国会员代表大会暨2018年全国学术会议

作者： Ran XQ pan h huang Sh Liu c.Niu X Li S Wang JF c.llege of Animal Sc.enc./Institute of Agro-Bioengineering Guizhou University Tongren University

c.py number variation(c.V) is a major proportion of genetic.variation,whic. c.anges the gene struc.ure and dosage and affec.s gene expression and *** validate the presenc. and the func.ion of c.V in pig,we used real-time quantitative polymerase c.ain reac.ion(qpc.) method to validate a 496 kb c.V region c.mprising MThFSD gene on c.romosome 6 of Xiang pig detec.ed by single nuc.eotide polymorphism(SNp) *** we investigated the distribution of the MThFSD c.V in a total of 545 pigs in four *** 46.2% and 32.7% individuals in the four pig breeds were detec.ed to be types of loss and gain of MThFSD *** relative c.py numbers of MThFSD gene showed the largest variation range(0-55 c.pies) in the Xiang pig *** c.py numbers of MThFSD gene presented the positive c.rrelations with the transc.ipt level of MThFSD gene in adult *** analysis indic.ted that c.Vs of MThFSD gene was signific.ntly c.anged the litter size traits of Xiang pigs,and the individuals with c.V gain showed more litter size than the c.V loss *** have reasons to believe that the MThFSD as RNA-binding protein play an important role in pig reproduc.ion as a result of regulating MThFS mRNA metabolism.

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