简介:使用RF-PECVD法分别在基底温度为60℃、120℃和200℃的N型单晶锗表面制备了α-C:H膜,采用拉曼光谱、傅里叶变换红外吸收光谱和原子力显微镜等技术手段研究分析了α-C:H膜的价键组成及表面形貌,讨论了基底温度对α-C:H膜微结构及部分性能的影响。结果表明,在α-C:H膜沉积过程中,基底温度对膜层微观结构有较大影响,基底温度60℃时,膜层表面光滑、致密无石墨化现象。随着基底温度的升高,α-C:H膜中含H量和微晶石墨量逐渐增多,α-C:H膜层性能也逐步退化。
简介:ThispaperdealswiththeapproximatesolutionoftheFredholmequationLu=fofthesecondkindwithf∈H’(Γ).First,wegivetheorderofthen-theoptimalradiusintheworstcasesetting.Then,weshowthattheGalerkinmethodusing2n+1innerproductsoffhasminimalerror.Finally,wegivetheestimateoftheε-complexityoftheFredholmproblemofthesecondkindandGalerkinmethodintheworstcasesetting.
简介:ObjectivesToinvestigatetheexpressionofhistamineH1receptors(H1R)inthevestibularnucleusofbrainsteminratsandtheroleofH1Rinmotionsickness(MS).MethodsAtotalof24healthySprague-Dawleyratsweredividedrandomlyintofourgroups(n=6each)whichdeterminediftheanimalswouldreceiveinductionofMSordrug(promethazine)treatment:MS(-)/Drug(-);MS(+)/Drug(-);MS(-)/Drug(+at0.25mg);andMS(+)/Drug(+).MSwasinducedbycomplexmotionstimulationandtheconditionedtasteaversionwasusedasabehavioralindicatorofMS.Thevolumeof0.15%sodiumsaccharinsolution(SS)intakewithin45minutesaftermotionstimulationwasmeasured.H1Rinthevestibularnucleuswasexaminedbyimmunofluorescencestaining.TheexpressionofH1Rproteininbrainstemtissueatvestibularnucleuslevelwasdetectedbywesternblot.ResultsThemeanSSintakevolumeintheMS(+)/Drug(-)group(8.8ml)wassignificantlylessthanthatoftheMS(-)/Drug(-)group(15.1ml)(P<0.01).ThemeanSSintakevolumeoftheMS(-)/Drug(+)group(14.8ml)wassimilartothatoftheMS(-)/Drug(-)group.ThemeanSSintakevolume(9.6ml)oftheMS(+)/Drug(+)groupwasmorethanthatoftheMS(+)/Drug(-)group(P<0.01),butlessthanthatoftheMS(-)/Drug(-)grouporMS(-)/Drug(+)group(P<0.01).ImmunofluorescencestainingshowedpositiveexpressionofH1Rinthevestibularnucleusofbrainstemandtheexpressionwasenhancedbymotionstimulation.WesternblotanalysisshowedthatH1Rproteinexpressedinthebrainstemtissueatvestibularnucleuslevelandtheexpressionalsoincreasedsignificantlyaftermotionstimulation.TheMS-inducedincreaseofH1Rwasnotaffectedsignificantlybypromethazine.ConclusionsH1RsexistinthevestibularnucleusinratsandH1Rexpressionisup-regulatedbymotionstimulation,butnotaffectedbypromethazine.ThefindingsindicatethatthehistaminergicsystemisinvolvedinMS.Promethazine,asanH1Rblocker,mayplayitsanti-MSrolebycompetingthebindingsiteon
简介:ThepreferenceofpaddyriceforNH4+ratherthanNO3ˉisassociatedwithitstolerancetolowpHsincearhizosphereacidificationoccursduringNH4+absorption.However,theadaptationofriceroottolowpHhasnotbeenfullyelucidated.TheplasmamembraneH+-ATPaseisauniversalelectronicH+pump,whichusesATPasenergysourcetopumpH+acrosstheplasmamembranesintotheapoplast.ThekeyfunctionofthisenzymeistokeeppHhomeostasisofplantcellsandgenerateaH+electrochemicalgradient,there...
简介:利用模糊点与模糊集的关系,引入了BCH-代数的(∈,∈∨q)-模糊H-理想、(■,■∨)-模糊H-理想和(s,t]-模糊H-理想的概念,指出了Hu-模糊H-理想、(∈,∈∨q)-模糊H-理想和(■,■∨)-模糊H-理想均为(s,t]-模糊H-理想的特例,讨论它们与其相应的水平H-理想的关系.(s,t]-模糊H-理想的同态象和同态原象是否成为(s,t]-模糊H-理想被研究,(s,t]-模糊H-理想的交与笛卡儿积被讨论.
简介:摘要目的总结甲型H1NI流感患者的护理措施。方法对56例甲型H1NI流感患者的护理经验进行回顾性分析和总结。结果53例病人咽拭子检测结果均转阴,病人愈后良好,1例患者转入本院重症监护室,2例患者转院治疗,转归率为94.6%。住院时日7~10d,平均(8.3±1.5)d。结论加强病情监测、体温监测、呼吸道护理、用药护理、心理护理,为患者疾病康复提供良好的前提条件。