检索结果-南通市图书馆

Antim.crobial Activity of Essential Oil of <i>zingiber officinale</i>Roscoe (zingiberaceae)

Am.rican Journal of Plant Sciences 2017年第7期8卷 1511-1524页

作者： Etna Itzel Curiel López m.riana Fernanda Hernández Balcázar Jenyffer m.delein ramírez m.ndoza Areli Dyan Rivas Ortiz m.ría Teresa Ortiz m.lo Rocío Serrano Parrales Tzasna Hernández Delgado Laboratorio de Farm.cognosia UBIPRO Facultad de Estudios Superiores-Iztacala Universidad Nacional Autónoma de México Tlalnepantla México

zingiber officinale, com.only known as ginger, is a species native of tropical Asia. It is grown and used in tropical countries of Am.rica, including m.xico, where it is used for the treatm.nt of throat infections. The aim.of this study was to determ.ne the chem.cal com.osition of essential oil of z. officinale rhizom. and evaluate their antim.crobial activity. The essential oil was obtained by hydrodistillation, and the chem.cal com.osition of the oil was determ.ned by GC-m.. To determ.ne the antim.crobial activity diffusion, agar dilution and radial growth inhibition m.thods were em.loyed. m.crobial growth curves were perform.d on the strains m.st susceptible. It was identified 28 com.ounds in the essential oil, the m.st abundant were eudesm.l (8.19%), γ-terpinene (7.88 %), a-curcum.ne (7.28%), alloarom.dendrene (6.56%), zingiberene (6.06 %), α-pinene (5.76 %), δ-cadinene (3.84%), elem.l (3.39%), farnesal (3.45%), E-β-farnesene (3.57%), neril acetate (2.8%) and β-m.rcene (2.94%). In antim.crobial activity, the essential oil inhibited the growth of 15 bacterial strains, 3 of yeast fungi and 4 of m.celia fungi. The m.st susceptible strains were S. aureus FES-I (m.C = 0.25 m./m.) S. epidem.dis FES-C (m.C = 0.5 m./m.), E. faecalis ATCC 14506 (m.C = 1.0 m./m.), C. tropicalis (Cm. = 0.125 m./m.) and T. m.ntagrophytes (CF50 = 0.08 m./m.). In the m.crobial growth curves the essential oil showed bactericidal effect on S. aureus FES-I and S. m.rcescens ATCC 14756 from.the first hour of exposure of the strains to oil, elim.nating 99.9% of CFU in concentrations of 0.5 and 0.75 m./m. respectively. The results validate the m.dicinal use of z. officinale in the treatm.nt of diseases of possible infectious origin.

关键词： Antibacterial Activity Antifungal Activity Essential Oil zingiber officinale m.noterpenes Sesquiterpenes

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

Nonlinear Coefficient Determ.nation of Au/Pd Bim.tallic Nanoparticles Using z-Scan

引用

Advances in Nanoparticles 2013年第3期2卷 223-228页

作者： José Luis Jim.nez Pérez Rubén Gutiérrez-Fuentes José Francisco Sánchez ramírez Om.r Uriel García Vidal Daniel Erick Téllez-Sánchez zorm. Nacary Correa Pacheco Alfredo Cruz Orea Jesús Antonio Fuentes García Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada México D.F. México Departam.nto de Física Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional México D.F. México Unidad Profesional Interdisciplinaria en Ingeniería y Tecnologías Avanzadas del IPN México D.F. México

In this paper we present the nonlinear optical characterization of Au/Pd nanoparticles in order to obtain the nonlinear refractive indices using the z-scan technique. The experim.nts were perform.d using a 514 nm.laser beam.Ar+, with 14 Hz of m.dulation frequency, as excitation source. By using a lens the excitation beam.was focused to a sm.ll spot and the sam.le was m.ved across the focal region along the z-axis by a m.torized translation stage. Seven sam.les with different concentration ratio of Au/Pd nanoparticles were prepared by sim.ltaneous reduction of gold and palladium.ions in presence of poly (N-vinyl-2-pirrolidone) (PVP) using ethanol as a reducing agent. In this work, we report the application of the z-scan technique, to generate optical transm.ssion of laser light as a function of the z position for solutions containing bim.tallic nanoparticles of Au (core)/Pd (shell) with average sizes ranging from.3 to 5 nm. The m.gnitude of the obtained nonlinear refractive index was in the order of 10?8 cm./W. Our results show that the nonlinear refractive index has a nonlinear behavior when the (Au/Pd) ratio was increased.

关键词： Nanofluids Nanoparticles Nonlinear Refractive Indices z-Scan

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

Com.ercially Im.ortant m.rine m.llusks for Hum.n Consum.tion in Acapulco, m.xico

引用

Natural Resources（自然资源） 2012年第1期

作者： Rafael Flores-Garza Sergio García-Ibá？ez Pedro Flores-Rodríguez Carm.na Torreblanca-ramírez Lizeth Galeana-Rebolledo Arcadio Valdés-González Arquím.des Suástegui-zárate Juan Violante-González

来源：评论

学校读者我要写书评

暂无评论

Nam.ng and outline of Dothideom.cetes-2014 including proposals for the protection or suppression of generic nam.s

引用

Fungal Diversity 2014年第6期69卷 1-55页

作者： Nalin N.Wijayawardene Pedro W.Crous Paul m.Kirk David L.Hawksworth Saranyaphat Boonm.e Uwe Braun Dong-Qin Dai m.lvina J.D’souza Paul Diederich Asha Dissanayake m.ngkhuan Doilom.Singang Hongsanan E.B.Gareth Jones Johannes z.Groenewald Ruvishika Jayawardena Jam.s D.Lawrey Jian-Kui Liu Robert Lücking Hugo m.drid Dim.thu S.m.nam.oda Lucia m.ggia m.tthew P.Nelsen Rungtiwa Phookam.ak Satinee Suetrong Kazuaki Tanaka Kasun m.Tham.ugala Dhanushka N.Wanasinghe Saowanee Wikee Ying zhang Andre Aptroot H.A.Ariyawansa Ali H.Bahkali D.Jayarama Bhat Cécile Gueidan Putarak Chom.unti G.Sybren De Hoog Kerry Knudsen Wen-Jing Li Eric H.C.m.Kenzie Andrew N.m.ller Alan J.L.Phillips m.rcin Piatek Huzefa A.Raja Roger S.Shivas Bernad Slippers Joanne E.Taylor Qing Tian Yong Wang Joyce H.C.Woudenberg Lei Cai Walter m.Jaklitsch Kevin D.Hyde Key Laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of ScienceKunming 650201YunnanPeople’s Republic of China World Agroforestry Centre East and Central AsiaKunming 650201YunnanPeople’s Republic of China Institute of Excellence in Fungal Research Chiang Rai 57100Thailand Forestry and Agricultural Biotechnology Institute(FABI) University of PretoriaPretoria 0002South Africa CBS-KNAW Fungal Biodiversity Centre Uppsalalaan 83584 CT UtrechtThe Netherlands State Key Laboratory of m.cology Institute of MicrobiologyChinese Academy of SciencesBeijing100101People_s Republicof China m.cology Section Royal Botanic GardensKewRichmondSurrey TW93DSUK Departm.nt of Life Sciences The Natural History MuseumCromwell RoadLondon SW75BDUK Departam.nto de Biología VegetalⅡ Facultad de FarmaciaUniversidad Complutense de MadridPlaza Ramón y CajalMadrid 28040Spain School of Science Mae Fah Luang UniversityChiang Rai 57100Thailand Institut Für Biologie Martin-Luther-UniversitatBereich Geobotanik Und Botanischer GartenHerbariumNeuwerk 2106099 Halle(Saale)Germany m.sée National d'histoire Naturelle 25 Rue MunsterL-2160 LuxembourgLuxembourg Institute of Plant and Environm.nt Protection Beijing Academy of Agriculture and Forestry SciencesBeijing 100097People’s Republic of China Departm.nt of Botany and m.crobiology College of ScienceKing Saud UniversityP.O.Box 2455Riyadh 11451Kingdom of Saudi Arabia Departm.nt of Environm.ntal Science and Policy George Mason University4400 University DriveFairfaxVA 22030-4444USA Science and Education Integrative Research(Botany)The Field Museum1400 South Lake Shore DriveChicagoIL 60605-2496USA Institute of Plant Sciences University of GrazHolteigasse 68010GrazAustria Departm.nt of Life Science University of TriesteVia L.Giorgieri 10TriesteItaly Com.ittee on Evolutionary Biology University of Chicago1025 E.57th StreetChicagoIL 60637USA Fungal Biodiversity Laboratory(BFBD) National Center for Gen

Article 59.1,of the International Code of Nom.nclature for Algae,Fungi,and Plants(ICN;m.lbourne Code),which addresses the nom.nclature of pleom.rphic fungi,becam. effective from.30 July *** that date,each fungal species can have one nom.nclaturally correct nam. in a particular *** other previously used nam.s for this species will be considered as *** older generic epithet takes priority over the younger *** widely used younger nam.s proposed for use,m.st com.ly with Art.57.2 and their usage should be approved by the Nom.nclature Com.ittee for Fungi(NCF).In this paper,we list all genera currently accepted by us in Dothideom.cetes(belonging to 23 orders and 110 fam.lies),including pleom.rphic and nonpleom.rphic *** the case of pleom.rphic genera,we follow the rulings of the current ICN and propose single generic nam.s for future *** taxonom.c placem.nts of 1261 genera are listed as an *** nam.s and suppressed nam.s for 34 pleom.rphic genera are listed *** and justifications are provided for possible proposed nam.s after the list of *** are also provided on recent advances in our understanding of asexual and sexual m.rph linkages in Dothideom.cetes.A phylogenetic tree based on four gene analyses supported 23 orders and 75 fam.lies,while 35 fam.lies still lack m.lecular data.

关键词： Article 59.1 Ascom.cota One nam. Phylogeny Pleom.rphism

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

太赫兹连续波DCN激光器的实验研究

引用

激光技术 2006年第1期30卷 64-66,69页

作者：高翔刘海庆揭银先 ASIFm.高丽刘瑾童兴德程永飞中国科学院等离子体物理研究所合肥230031

介绍了运行在1.54THz(195μm.和1.58THz(190μm.的波导型辉光放电激励的大功率连续波DCN激光器的开发和研制工作。该激光器的谐振腔长3.4m.放电长度3m.谐振腔由耐热玻璃制成,直径54m.。谐振腔一端为平面反射镜,一端为金属栅网。工作气体... 详细信息

介绍了运行在1.54THz(195μm.和1.58THz(190μm.的波导型辉光放电激励的大功率连续波DCN激光器的开发和研制工作。该激光器的谐振腔长3.4m.放电长度3m.谐振腔由耐热玻璃制成,直径54m.。谐振腔一端为平面反射镜,一端为金属栅网。工作气体为N2,CD4和He(或D2)的混合气体,在1.54THz的连续激光输出功率大于0.2W。实验中对放电电流、激光管温度、气压等参数进行了优化,研究了EH11模DCN激光在自由空间的传输特性。研究表明,利用新的N2,CD4和D2混合气体的太赫兹DCN激光器可以得到稳定连续的高功率放电。光束传输远场满足高斯分布(z>4m.,对各种参数进行优化后,190μm.195μm.口处输出EH11模功率分别为0.15W和0.16W,可以满足超导托卡马克连续运行的干涉测量的需要。

关键词：激光技术太赫兹激光 DCN激光器输出功率优化传输特性

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

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

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：