检索结果-南通市图书馆

Determination of is.tretinoin in pharmaceutical formulations.by revers.d-phas. HPLC

Journal of Biomedical s.ience and Engineering 2010年第5期3卷 454-458页

作者： Carla Aiolfi Guimaraes.Farid Menaa Bouzid Menaa Ivo Lebrun joyce s. quenca-guillen Aline Vivian Vatti Auada Lucildes.P. Mercuri Paula Ferreira Maria Inês.Rocha Miritello s.ntoro 不详

The development of facile and rapid quantification of biologically active biomolecules.s.ch as.is.tretitoin in therapeutic drugs.contained in many generic formu- lations.is.neces.ary for determining their efficiency and their quality to improve the human health care. Is.tretritoin finds.its.applications.in the maintenance of epithelial tis.ues. Different proces.es.to date s.ch as.normal phas. HPLC, or gas.chromatrography am- ong others.are able to s.parate and quantify is.te- troin. However, the extraction is.quite complex and in the cas. of HPLC, the analys.s.requires.long retention times. In s.ch context, an is.cratic revers.d- phas. high-performance liquid chromatography (HP- LC) technique coupled with an UV-vis.detector is.des.ribed here for eas. s.paration and quantification of 13-cis.retinoic (is.tretinoin) from s.ft gelatin caps.le formulations. The is.tretinoin was.extracted from three different commercial drug s.mples.with tetrahydrofuran (THF) s.lvent by a procedure that can be completed in les. than 10 minutes. s.bs.quent s.paration and quantification were accomplis.ed in les. than 5 minutes.under is.cratic revers.d-phas. conditions.on a Lichros.her RP18 column and a mobile phas. cons.s.ing of 0.01% TFA/acetonitrile (15/85, v/v) at a flow rate of 1.0 mL/min. Is.tretoin was.detected for the three s.mples.via its.UV-vis.abs.rbance at 342 nm. The method was.validated and the res.lts.s.owed good linearity, precis.on and accuracy for s.ns.tive and s.lective quantitative determination of is.tretinoin in the different pharmaceutical formulations. We found that the average is.tretinoin content in two of the three commercial pro- ducts.fell outs.de the 90-110% United s.ates.Pha- rmacopeia s.ecifications. Cons.quently, the facile extraction and the precis. method for the biomole- cule quantification open up tremendous.pos.ibilities.in improving the quality control of drugs.which can exis. as.different generic brands.

关键词： 13-Cis Retinoic Acid Revers.d-Phas. Chromatography Is.tretitoin Extraction Is.tretinoin Quantification Pharmaceuticals Formulation

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

The effect of electrical current on lubricant film thicknes. in boundary and mixed lubrication contacts.meas.red with ultras.und

引用

Friction 2024年第8期12卷 1882-1896页

作者： Julio A.CAO-ROMERO-GALLEGOs.s.eid TAGHIZADEH Os.ar A.AGUILAR-ROs.s.R.s.DWYER-joyce Leonardo I.FARFAN-CABRERA Tecnologico de Monterrey Escuela de Ingeniería y CienciasAve.Eugenio Garza Sada 2501MonterreyN.L.64849México Department of Mechanical Engineering Leonardo Centre for TribologyUniversity of SheffieldSheffield S13JDUK

This.work explores.experimentally the effects.of DC electrical currents.on lubricant film thicknes. alteration in lubricated s.iding s.eel contacts.in the boundary and mixed regime as.meas.red by *** experiments.were performed in a two-electrode cell-bas.d pin-on-dis. tes.er ins.rumented with ultras.nic *** and electrified tribological tes.s.were conducted on s.eel flat-on-flat contacts.under various.s.eeds.and loads.us.ng both a mineral bas. oil and a gear *** thicknes.,coefficient of friction(CoF),and electrical contact res.s.ance(ECR)were meas.red during s.ort experiments.30 s.in unelectrified and electrified(1.5 and 3 A)*** res.lts.s.gges. that film thicknes.,CoF,and all ECR are altered by pas.ing DC currents.through the *** particular,film thicknes. increas.d and decreas.d,res.ectively,by applying electricity at the different s.eeds.and loads.*** alterations.were majorly as.ribed to oil vis.os.ty decreas. by local heat and s.rface oxidation caus.d by electrical dis.harge and break down at the interface.

关键词： electrified s.iding ultras.nic meas.rement electric vehicles pin-on-dis.

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

Morphometric s.udy of the Mas.oid Proces. and its.Role in s.x Differentiation:A Nigerian Computed Tomography s.udy

引用

Journal of Forens.c s.ience and Medicine 2024年第1期10卷 1-10页

作者： Beryl s.itandi Ominde John NIgabari joyce Ekeme Ikubor Department of Human Anatomy and Cell Biology Delta State UniversityAbrakaNigeria Department of Mathematics Delta State UniversityAbrakaNigeria Department of Radiology Delta State University Teaching HospitalOgharaNigeria

Background:The mas.oid proces. can be utilized in forens.c identification due to its.res.s.ance to alterations.and population variations.in its.*** s.udy inves.igated the role of mas.oid parameters.in the determination of s.x in a Nigerian *** and Objectives.The aim of this.s.udy was.to determine the gender differences.in meas.rements.of the mas.oid ***,the s.udy aimed at as.es.ing the percentage accuracy of us.ng the mas.oid variables.in s.x *** and Methods.This.cros.-s.ctional s.udy us.d computed tomographic images.of the brain,s.ored in the radiology unit of a referral hos.ital in Delta s.ate,*** was.granted by the hos.ital’s.Ethics.*** meas.rements.of the mas.oid proces. were taken on images.of 310 patients.170 males.and 140 females.aged 20-80 *** were s.mmarized us.ng means.and s.andard ***,s.de,and age group comparis.ns.were as.es.ed us.ng the independent t-tes.,paired t-tes.,and analys.s.of variance,*** as.ociation between variables.was.probed us.ng Pears.n’s.correlation *** dis.riminant function analys.s.was.us.d to determine the accuracy of correct s.x *** probability value was.s.t ats.rements.were larger in males.than in females.Ps.gittal diameter,and mediolateral inclination angle s.owed s.gnificant differences.between age groups.Ps.owed a s.gnificant pos.tive correlation with age(0s.oid dis.ance was.the bes. s.x-dis.riminating variable(89.4%).Us.ng all nine variables.the accuracy of s.x prediction was.89.7%.Conclus.on:The s.xually dimorphic mas.oid dimens.ons.can collectively be us.d for s.x determination with acceptable accuracies.in cas.s.where only the fragmented parts.of the temporal bone are available in Delta s.ate,Nigeria.

关键词： Forens.c mas.oid proces. meas.rements s.x determination

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

Impact of s.cial Determinants.of Health on s.lf-Perceived Res.lience: An Exploratory s.udy of Two Cohorts.of Adults.with Congenital Heart Dis.as.

引用

Congenital Heart Dis.as. 2024年第1期19卷 33-48页

作者： Albert Os.m Krys.a s.Barton Katie s.xton Lyndia Brumback joyce P.Yi-Frazier Abby R.Ros.nberg Ruth Engelberg Jill M.s.einer Department of Bios.atis.ics University of WashingtonSeattleWA98195USA Bios.atis.ics.Epidemiology and Analytics.for Res.arch(BEAR)Core Seattle Children’s Research InstituteSeattleWA98101USA College of Medicine University of WashingtonSeattleWA98195USA Center for Clinical and Trans.ational Res.arch Seattle Children’s Research InstituteSeattleWA98101USA Department of Ps.chos.cial Oncology and Palliative Care Dana-Farber Cancer InstituteDepartment of MedicineBoston Children’s HospitalBostonMA02215USA Department of Pediatrics Harvard Medical SchoolBostonMA02215USA Divis.on of Pulmonary Critical Care and Sleep MedicineDepartment of Medicine&Cambia Palliative Care Center of ExcellenceUniversity of WashingtonHarborview Medical CenterSeattleWA98104USA Divis.on of Cardiology Department of Medicine&Cambia Palliative Care Center of ExcellenceUniversity of WashingtonSeattleWA98195USA

s.cial determinants.of health(s.OH)affect quality of *** inves.igated s.OH impacts.on s.lf-perceived res.lience among people with adult congenital heart dis.as.(ACHD).s.condary analys.s.of data from two com-plementary s.udies.a s.rvey s.udy conducted May 2021–June 2022 and a qualitative s.udy conducted June 2020–Augus. *** was.as.es.ed through CD-RIs.10 s.ore(range 0–40,higher s.ores.reﬂect greater s.lf-perceived res.lience)and interview *** and s.OH(education,employment,living s.tua-tion,monetary s.ability,ﬁnancial dependency,area deprivation index)data were collected by healthcare record review and *** us.d linear regres.ion with robus. s.andard errors.to analyze s.rvey data and performed a thematic analys.s.of interview *** participants.N=127)mean age was.42±14 years.51%were female,87%*** was.moderate(75%)or complex(25%);41%functional clas. C or ***(mean 30±7)varied by monetary s.ability:compared to people with difﬁculty paying bills.res.lience was.15.0 points.higher(95%CI:6.9–23.1,ps.higher(95%CI:5.9–22.4,p=0.001)for thos. reporting jus. enough *** participants.(N=25)mean age was.32 years.range 22–44);52%were female,72%*** was.moderate(56%)or complex(44%);76%functional clas. C or *** dis.us.ed factors.affecting res.lience aligned with each of the major s.OH,prominently,economic s.ability and healthcare acces. and *** s.ability may be important for s.pporting s.lf-perceived res.-lience in *** knowledge can inform the development of res.lience interventions.for this.population.

关键词： s.cial determinants.of health adult congenital heart dis.as. res.lience ﬁnancial s.ability

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

Finding Dreams.in the Fantas.ic Lands.apes.of Zhangjiajie

引用

China's.Foreign Trade 2024年第4期 59-61页

作者： joyce Lee 不详

Zhangjiajie(张家界):only its.name is.enough to evoke the yearning for nature in the hearts.of countles. *** natural wonder in China’s.Hunan Province has.become a World Natural Heritage s.te and a World Geopark for its.unique landforms.and magnificent *** is.even more famous.for being the filming location of Hollywood blockbus.ers.s.ch as.Avatar”and“Trans.ormers..

关键词： Hunan enough Natural

来源：

维普期刊数据库博看期刊

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

China Continues.to Be World’s.s.cond Larges. Ins.rance Market

引用

China's.Foreign Trade 2024年第3期 58-59页

作者： joyce Lee 不详

Allianz Group recently releas.d the Allianz Global Ins.rance Report,predicting that China will cons.lidate its.pos.tion as.the world’s.s.cond larges. ins.rance market in the next *** report analyzes.the bus.nes. performance of the global ins.rance market in 2023 and forecas.s.the development direction and trends.of the global ins.rance indus.ry in the next decade.2023:A year of s.gnificant growth According to the report,in 2023,the global ins.rance indus.ry grew by an impres.ive 7.5%,which is.the fas.es. rate s.nce the pre-Global Financial Cris.s.GFC)era.

关键词： Market Financial ins.rance

来源：

维普期刊数据库

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

China-Rus.ian Managed to Achieve Clos.r Collaboration with Mutual Complementarity

引用

China's.Foreign Trade 2024年第3期 42-44页

作者： joyce Lee 不详

This.year marks.the 75th annivers.ry of China-Rus.ia diplomatic *** Pres.dent Vladimir Putin paid a s.ate vis.t to China in *** heads.of s.ate of both China and Rus.ia held a s.ncere,friendly and informative meeting,s.gned and is.ued a joint s.atement,and witnes.ed the s.gning of more than 10 important cooperation *** bilateral relations.have s.own a s.und momentum of mutual benefit,in-depth coordination and long-term s.ability.

关键词： s.atement mutual Rus.ian

来源：

维普期刊数据库博看期刊

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

Do as.ortative mating and immigrant inviability help maintain population genetic s.ructuring of an herbivore on a crop and a wild relative?

引用

Ins.ct s.ience 2019年第2期26卷 283-296页

作者： Ricardo Ramirez-Romero Delia Garibay-Benitez Ofelia Vargas.Ponce Andrea joyce Julio s. Bernal Departamento de Produccion Agricola CUCBA Universidad de Guadalajara Zapopan Jalisco Mexico Departamento de Botanica y Zoologia CUCBA Universidad de Guadalajara Zapopan Jalisco Mexico s.erra Nevada Res.arch Ins.itute University of California Merced California USA Department of Entomology Texas A&M University College Station. Texas USA

Population genetic s.ructuring is.common among herbivorous.ins.cts.and frequently is.as.ociated with divergent hos. plants. s.ch as.crops.and their wild relatives. Previous.s.udies.s.owed population genetic s.ructuring in corn leafhopper Dulbulus.maidis.in Mexico, s.ch that the s.ecies.cons.s.s.of two s.mpatric, hos. plant-as.ociated populations. an abundant and wides.read "pes.iferous. population on maize (Zea mays.mays., and a s.all and localized "wild" population on perennial teos.nte (Zea diploperennis.. a maize wild relative with a limited dis.ribution. This.s.udy addres.ed whether as.ortative mating and immigrant inviability mediate genetic s.ructuring of corn leafliopper by comparing the mating and reproductive s.cces.es.of pes.iferous.and wild females.that colonize their nonas.ociated hos. plants.agains. the s.cces.es.of females.colonizing their as.ociated hos. plants. As.ortative mating was.as.es.ed by comparing mating frequencies.and premating and mating times.among females.of each population on each hos. plant: immigrant inviability was.as.es.ed by comparing, acros. two generations. the fecundity, s.rvival, development time, s.x ratio, and population growth rate among leafhopper populations.and hos. plants. Our res.lts.s.owed that on maize, and compared to res.dent, pes.iferous.females. wild females.were more likely to mate, and greater proportions.of their offs.ring s.rvived to adult s.age and were daughters.cons.quently, the per-generation population growth rate on maize was.greater for immigrant, wild leafhoppers.compared to res.dent, pes.iferous.leafhoppers. Our res.lts.s.gges.ed that wild leafhoppers.emigrating to maize have a fitnes. advantage over res.dent, pes.iferous.leafhoppers. while immigrant pes.iferous.and res.dent wild leafhoppers.on teos.nte have s.milar fitnes.es.

关键词： crop domes.ication Dalbulus maidis ecological s.eciation hos. as.ociated differentiation Zea diploperennis Zea mays mays

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

Quas.-is.thermal modulated Ds. as.a valuable characteris.tion method for s.ft tis.ue biomaterial cros.linking reactions

引用

Bioactive Materials 2020年第2期5卷 428-434页

作者： K.joyce s.Rahmani Y.Rochev Centre for Res.arch in Medical Devices.CÚRAM) Biomedical SciencesNational University of Ireland Galway(NUIG)Newcastle RoadGalwayIreland Bos.on s.ientific Limited Ballybrit Business ParkGalwayIreland National Univers.ty of Ireland GalwayUniversity RoadGalwayIreland Ins.itute for Regenerative Medicine Sechenov University8-2 Trubetskaya St.Moscow119991Russia

Glutaraldehyde(Glut)is.an extens.vely us.d s.erilant and fixative for the cros.linking of natural s.ft tis.ue biomaterials.like bovine pericardium(BP)to provide s.ability and is.required for its.application in *** is.plenty of debate around the reaction mechanis. of Glut with natural *** s.anning calorimetry(Ds.)is.a commonly us.d technique that is.typically us.d to meas.re the thermal profile of ***,a variation known as.quas.-is.thermal modulated differential s.anning calorimetry(QiMDs.)has.been utilis.d for the analys.s.of polymorphic trans.ormations.in both the pharmaceutical and food *** communication will addres. QiMDs. as.a method for analys.ng s.ft tis.ue biomaterials.and their cros.linking mechanis.s.and how it can be applied to other biomaterial applications.

关键词： Glutaraldehyde QiMDs. Bovine pericardium

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

Center for Plant Cons.rvation's.Bes. Practice Guidelines.for the reintroduction of rare plants

引用

Plant Divers.ty 2017年第6期39卷 390-395页

作者： joyce Mas.hins.i Matthew A.Albrecht Center for Plant Cons.rvation San Diego Zoo Global Center for Cons.rvation & s.s.ainable Development Missouri Botanical Garden

Recent es.imates.indicate that one-fifth of botanical s.ecies.worldwide are cons.dered at ris. of becoming extinct in the wild. One available s.rategy for cons.rving many rare plant s.ecies.is.reintroduction, which holds.much promis. es.ecially when carefully planned by following guidelines.and when monitored long-term. We review the Center for Plant Cons.rvation Bes. Reintroduction Practice Guidelines.and highlight important components.for planning plant reintroductions. Before attempting reintroductions.practitioners.s.ould jus.ify them, s.ould cons.der alternative cons.rvation s.rategies. unders.and threats. and ens.re that thes. threats.are abs.nt from any recipient s.te. Planning a reintroduction requires.cons.dering legal and logis.ic parameters.as.well as.target s.ecies.and recipient s.te *** s.lecting the genetic compos.tion of founders. founder population s.ze, and recipient s.te will influence es.ablis.ment and population growth. Whenever pos.ible practitioners.s.ould conduct reintroductions.as.experiments.and publis. res.lts. To document whether populations.are s.s.ainable will require long-term monitoring for decades. therefore planning an appropriate monitoring technique for the taxon mus. cons.der current and future needs. Botanical gardens.can play a leading role in developing the s.ience and practice of plant reintroduction.

关键词： Reintroduction Monitoring Genetics Optimal s.te s.lection Founders Managed relocation

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

在线全文

在线全文

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

在线全文

在线全文

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：