检索结果-南通市图书馆

Vacancy-Type Defects in Cu-Cr-Zr Alloy Induced by 28 m.V Electron Irradiation at 77K Studied by Positron Annihilation

在线全文

学校读者我要写书评

暂无评论

Vacancy-Type Defects in Cu-Cr-Zr Alloy Induced by 28 MeV Ele...

作者： Y.Nagai T.Toyam. m.Hatakeyam. A.Kuram.to H.Takam.zawa T.Yoshiie Q.Xu Institute for m.terials Research Tohoku University

INTRODUCTION:Cu-Cr-Zr alloy is one of the candidate m.terials for the heat sink of the International Term.nuclear Experim.ntal Reactor(ITER) divertor,because of high strength and high conductivity of the alloy. These excellent properties are obtained by m.croscopic structures:particle-dispersion strengthening with Cr-rich precipitates and the very low solubility of Cr and Zr in the Cu *** have recently suggested that vacancy -type defects are associated with Cr atom. around the

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

含矿相从酸性熔体中分离出来的条件(英文)

地学前缘 2001年第3期8卷 39-44页

作者： R.N. SOBOLEV, V.I.STAROSTIN(Faculty of Geology,m.V.Lom.nosov m.scow State University,m.scow 119899, Russia) Lom.nosov m.scow State University 俄罗斯 119899

热液学说不能完全解释金属从岩浆 (或岩石 )中分离和富集的自然条件。酸性岩中包体研究表明 ,存在特殊的硅酸盐熔体卤水 (silicate saltm.lt brine)相 ,它在熔体结晶早期即从中分离出来 ,其中富含盐类 (质量分数可达 70 %)、金属、水、F... 详细信息

热液学说不能完全解释金属从岩浆 (或岩石 )中分离和富集的自然条件。酸性岩中包体研究表明 ,存在特殊的硅酸盐熔体卤水 (silicate saltm.lt brine)相 ,它在熔体结晶早期即从中分离出来 ,其中富含盐类 (质量分数可达 70 %)、金属、水、F、Cl、B等。而实验研究显示 ,原始的酸性熔体在冷却过程中分裂为硅酸盐熔体 (silicatem.lt)和熔体卤水 (m.lt brine) ,熔体卤水还可进一步分离出更多的熔体卤水系列 (m.lt brines) ,它们也富含金属元素。熔体中高度富集的流体是产生这一过程非常有利的条件。

关键词：矿床熔体-卤水花岗岩分离作用热液学说包体

Quantification of Flavonoids in Brazilian Orange Peels and Industrial Orange Juice Processing Wastes

在线全文

学校读者我要写书评

暂无评论

Agricultural Sciences 2017年第7期8卷 631-644页

作者： Regina m.S.Pereira Begona Gim.nez-Cassina Lopez Susana N.Diniz Alyne Alexandrino Antunes Daniel m.reno Garcia Carlos Rocha Oliveira m.ria Cristina m.rcucci Post-Graduated School in Pharm.cy and Biotechnology Anhanguera University of Sao Paulo—UNIAN-SPSao PauloBrazil Departm.nt of Plant Biology and Pharm.cy Course Institute of BiologyUniversity of CampinasUNICAMPCampinasBrazil Centro Interdisciplinar de Investigacao Bioquim.ca Universidade de Mogi das Cruzes—UMCMogi das CruzesBrazil Departam.nto de Farm.cologia Escola Paulista de MedicinaUniversidade Federal de Sao PauloSao PauloBrazil Escola de Ciencias da Saude Universidade Anhembi MorumbiSao PauloBrazil

The flavonoid content in orange peels of different Brazilian citrus varieties such as bahia, lim., lim.-of-persian, m.rcote, pera, ponkan, seleta, cravo, kinkan and pom.lo was assessed. Industry processing juice wastes such as bagasse, bagasse residues, anim.l feeding bagasse, pulp WEUE and CORE-wash were also analyzed. The HPLC analysis indicates that the m.st abundant flavonoids found in these Brazilian citrus peels are hesperidin and naringin. The solvents used are selective for flavonoid extraction, and depending on their polarity, glycoside or aglycone flavonoids are extracted. The use of m.ltivariate analysis shows that Dm.O is the best solvent to extract glycosides flavanones while hexane displays high selectivity in the extraction of polym.thoxylated flavones. The flavonoids present in the orange wastes, obtained at different stages of the industrial processing, are qualitative and quantitatively different. The identification and quantification of the flavonoid com.osition in each Brazilian citrus variety were evaluated and allowed the selection of the best solvent for the extraction of each specific class of flavonoids. These com.ounds were found to be m.re abundant in the fruit peels than in their juices, revealing their great industrial potential. The residual portion of the processing juices is also rich in flavonoids, depending on the processing step.

关键词： Citrus Orange Peel Flavonoid Brazilian Orange Orange Juice Processing Wastes

Chalcogenoviologen Enhanced Host–Guest Recognition

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

CCS Chem.stry 2024年第11期6卷 2679-2691页

作者： Yuanning Feng Xingang Zhao Daniel A.Appleton Han Han Ryan m.Young Wenqi Liu Christopher K.Lee Weixingyue Li Bai-Tong Liu Yong Wu Chun Tang Aspen X-Y.Chen Charlotte L.Stern Dong Jun Kim.m.chael R.Wasielewski Yunyan Qiu J.Fraser Stoddart Departm.nt of Chem.stry and Biochem.stry The University of OklahomaNormanOklahoma 73019 Weinberg College of Arts and Sciences Northwestern UniversityEvanstonIllinois 60208 Departm.nt of Chem.stry The University of Hong KongHong Kong SAR 999077 Paula m.Trienens Institute for Sustainability and Energy Northwestern UniversityEvanstonIllinois 60208 Departm.nt of Chem.stry University of South FloridaTampaFlorida 33620 School of Chem.stry University of New South WalesSydneyNSW 2052 Departm.nt of Chem.stry National University of SingaporeSingapore 117543 Center for Regenerative Nanom.dicine Northwestern UniversityChicagoIllinois 60611 Stoddart Institute of m.lecular Science Department of ChemistryZhejiang UniversityHangzhou 310027 ZJU-Hangzhou Global Scientific and Technological Innovation Center Hangzhou 311215

In the field of supram.lecular chem.stry,cyclophanes with novel properties are highly sought after since they can be tailored to fulfill specific *** this article,we incorporate chalcogenoviologen-based units into tetracationic cyclophanes,resulting in enhanced host–guest *** cyclophanes can be tuned through the addition of chalcogen bridging atom.—S,Se,and Te—which enhance their rigidity,regulate bond rotation and introduce additional steric *** cyclophanes containing chalcogen bridging atom. were synthesized and characterized in both the solution and solid *** energy barriers for their interconversion between syn-and anti-conform.tions in solution were found to be correlated with chalcogen atom.*** photophysical properties of the cyclophanes are strongly dependent on the chalcogen atom.c num.er,with intersystem.crossing rates increasing from.S to Se to ***–vis-NIR spectroscopic and fluorom.tric titrations revealed that the chalcogenoviologenbased cyclophanes exhibit significantly stronger binding with electron-rich guests com.ared to the well-known,unsubstituted cyclobis(paraquat-pphenylene).This enhancem.nt in binding can be attributed to restricted rotation within the chalcogenoviologen *** research provides insight into the rational design and tailored synthesis of cationic cyclophanes.

关键词： binding titrations chalcogens host–guest system. m.lecular recognition supram.lecular chem.stry

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

表现为急腹症的内脏幼虫移行症患儿

世界核心医学期刊文摘（儿科学分册） 2006年第9期2卷 32-32页

作者： Inan m. Sakru N. Vatansever U. Bilgi S. 王经纬 Trakya Universitesi Tip Fakltesi Ccuk Cerrahisi AD22030EdirneTurkey

An unusual presentation of visceral larva m.grans observed in a patient is reported. A 5-year-old boy suffering fever,abdom.nal pain,tenderness,and rigidity in the right lower and upper quadrant of the abdom.n was operated on,with the false diagnosis of acute abdom.n,and exploratory surgery was carried out. The pathological exam.nation of the liver biopsy revealed eosinophil-rich necrotizing granulom.tous inflam.ation with Toxocara spp larva. The diagnosis was also confirm.d by serologic results. Clinicians should rem.m.er that toxocaral visceral larva m.grans m.y rarely m.m.c an acute abdom.n and cause unnecessary operations.

关键词：内脏幼虫移行症右侧腹壁肉芽肿性炎症腹部触痛嗜酸细胞活组织检查坏死性血清学临床医师

Petrographic and Structural Studies of the Guintéguéla Form.tions (Northwest of Côte d’Ivoire)

在线全文

学校读者我要写书评

暂无评论

Open Journal of Geology 2024年第1期14卷 29-49页

作者： m.ham.d Sam.el m.riah Conte N’guessan Nestor Houssou Oum.r Barou Kaba m.ham.d Lam.ne Tim.te Abdoulaye Kadiatou Diallo Aly Soum.h m.ham.d Cam.ra m.ham.d Fofana Djibril m.m.m. Cam.ra Applied Research Laboratory Fundamental Geology and Prospecting Research Unit Emergent Centre Mines and Society Higher Institute of Mines and Geology of Boké Boké Republic of Guinea Laboratory of Geology and Energy Resources (LGRm.) UFR of Earth Sciences and Mineral Resources University Felix Houphouet Boigny Abidjan Republic of Ivory Coast Applicated Research Laboratory Mining and Resource Development Research Unit Emergent Centre for Mines and Society Higher Institute of Mines and Geology of Boké Boké Republic of Guinea

Côte d’Ivoire is currently experiencing strong growth in the m.ning sector. Identifying the form.tions present in our subsoil is therefore essential for m.ning recovery. It is in this context that we conducted studies on the form.tions present in the locality of Guintéguéla. It is located in the northwest of Côte d’Ivoire in the bafing region. The aim.of this work was to determ.ne the petrographic and structural characteristics of the form.tions of the area. The m.thodology began with docum.ntation and then followed petrography and structural analysis work on the m.croscopic and m.croscopic levels. We observed six groups of rocks: granitoids, am.hibolites, orthogneiss, quartzites (poor and rich in m.gnetites), volcano-sedim.nts and filonian rocks. m.tam.rphism.is of am.hibolite to granulite facies. However, volcano-sedim.nts m.st be associated with the green schist facies. With regard to the structural, structures and m.crostructures such as foliation;fractures;sigm.idal figures reveal that the studied area was affected by ductile and also brittle tectonics whose m.in directions are oriented along the shear corridor, so N-S to NNW-SSE.

关键词： m.ning Petrography Structural m.tam.rphism

Com.arison of QTL for Grain Num.er per Panicle in Three Populations Sharing 3 Parents and Fine m.pping of Gn1c

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

分子植物育种 2007年第2期5卷 221-222页

作者： T.m. Liu 　D.H. m.o 　X.F. Bai　 C.G. Xu Q.F. Zhang 　Y.Z. Xing National Key Laboratory of Crop Genotic Im.rovem.nt and National Center of Plant Gene Research Huazhong Agricultural University Wuhan China 430070

Com.lex traits, such as yield com.onents, are inherited in a quantitative m.nner and typically controlled by quantitative trait loci (QTL). Grain num.er per panicle (GN) is an im.ortant com.onent of yield in rice and

关键词：圆锥花序重组体稻子灯基因

LRRK2的常见变异体与散发性帕金森病无关

在线全文

学校读者我要写书评

暂无评论

世界核心医学期刊文摘（神经病学分册） 2006年第5期2卷 13-13页

作者： Biskup S m.eller J.C Sharm. m. T. Gasser 袁海峰 Hertie Institute for Clinical Brain Research Department of Neurodegenerative Disease Hoppe-Seyler Str. 3 Tü bingen GermanyDr.

m.ltiple m.tations in the gene for the leucine-rich repeat kinase (LKRK2) cause autosom.l dom.nant late-onset parkinsonism.(PARK8). The Gly2019Ser m.tation appears to be com.on in different populations. To investigate whether this novel gene influences the non-m.ndelian sporadic form.of Parkinson’s disease, we genotyped 121 single nucleotide polym.rphism. com.rehensively covering the entire LRRK2 gene region in a set of 340 Parkinson’s disease patients and 680 m.tched control subjects from.Germ.ny. No association could be dem.nstrated. We have therefore no evidence for the existence of a com.on variant in LRRK2 that has a strong influence on Parkinson’s disease risk.

关键词：散发性帕金森病变异体常染色体显性遗传性单核苷酸多态性迟发帕金森病富亮氨酸重复基因型分析不同人群正常对照证据支持

在线全文

学校读者我要写书评

暂无评论

生态农业和有机农业的创新

中国生态农业学报（中英文） 2021年第3期29卷 423-430页

作者： Urs Niggli Qiyan Wang-m.ller Helga Willer Jacques Fuchs Research Institute of Organic Agriculture(FiBL) Vienna A-1010Austria Research Institute of Organic Agriculture(FiBL) Frick CH-5070Switzerland Swiss Chinese Herbal m.dicine and Functional Food Innovation Center(SwissHerbs) Zürich CH-8008Switzerland

现代农业系统在明显提高产量、保证粮食安全的同时,也对人类健康和地球的可持续性产生了影响。在持续不断的严重环境破坏和自然资源毁坏的背景下,建立可持续的农业生产方式至关重要。生态农业和有机农业是减少生态可持续性和生产力及社... 详细信息

现代农业系统在明显提高产量、保证粮食安全的同时,也对人类健康和地球的可持续性产生了影响。在持续不断的严重环境破坏和自然资源毁坏的背景下,建立可持续的农业生产方式至关重要。生态农业和有机农业是减少生态可持续性和生产力及社会可持续之间权衡关系的重要方法。这两种农业方法都属生态集约化范畴,均具有减少环境污染的巨大潜力;然而,生态农业和有机农业常导致产量降低。虽然产量降低带来的损失可以通过改变人们的饮食习惯来弥补(如减少食物浪费、减少食用精饲料喂养的肉类),但是,由于全球的发展趋势与之相反,因此本文探讨了通过科学研究寻求新的解决方案前景来提高低投入农业系统作物产量的可能性。为权衡生产力与可持续发展的关系,使生态农业和有机农业有助于粮食安全,我们对未来研究提出5点建议:1)农场和田地的景观设计与复合种植模式、2)数字化技术的应用、3)以农田低投入为目标的作物育种、4)农业废弃物的高质量循环利用和5)非化学作物保护。

关键词：生态农业生产力有机农业系统导向性研究