查询词典 tubular membranes

Proton exchange membranes based on polyacrylonitrile /silica composites doped with heteropolyacids such as phosphotungstic acid or silicotungstic acid were prepared by sol-gel method.

采用溶胶－凝胶法制备了杂多酸掺杂聚丙烯腈－二氧化硅(PAN-SiO2)复合质子交换膜，并研究了其质子导电性能、保水能力和抗化学氧化性能。

Morphologies difference of the membranes is attributed to the solvolytic reaction of the system.

铸膜液的熟化时间对膜内部的微观孔结构亦具有显著影响。

ML/min,the end of reaction(pH=7).These precipitates were then peptized with peptizator HAc at 80 ℃ for 12 h. So a stable transparent colloidal sol was obtained.By using this sol,splinterless La2O3-Al2O3 membranes were prepared.

mL/min、反应终点(pH=7)，加入HAc作胶溶剂，于80 ℃恒温胶溶12 h，可制得稳定、透明的溶胶，用该溶胶可制得无开裂的La2O3-Al2O3膜。

After treatment with 0.5mmol/L SA hydroponic solution at 30/22℃ for 1d some damaging changes in ultrastructures of banana leaves were observed, indicated by appearance of many crevices in cell walls, swelling of granal and stromatic thylakoid membranes, and disappearance of many starch granules in chloroplasts.

这表明，SA的抗寒作用不是直接的，而是间接的，SA可能是一种胁迫：高浓度的SA可能是一种严重胁迫，造成了胁迫伤害；而适当浓度的SA可能是一种胁迫锻炼，增强了抗寒性。

So far, nsLTP was proposed to promote the spreading of systemic acquired resistance signal in arabidopsis, and induce the adhesion of the pollen tube to an artificial stylar matrix in vitro, suggesting a receptor-like molecule likely exists in the cell membranes.

三级结构主要由四个α-螺旋组成，四个α-螺旋由四对二硫键相连，形成一个能结合各种脂质分子的疏水性孔穴。

In rat,no matter the young or old,there is only endotheliumin the tunica intima,there are no subendothelial layer and internal elastic membranes.

而在大鼠冠脉不论幼年或老年，其内膜仅由内皮构成，无内弹性膜和内皮下层，因而从幼年至老年始终没有内膜增厚和管腔变窄现象。

These include physical characteristics, such as repulsive forces resulting from the electronegative charge of both platelet and endothelial cell membranes, and biochemical attributes, such as the synthesis and release of inhibitors of platelet activation. Platelets respond rapidly to alterations of endothelial cells and to exposure of subendothelial structures by attaching firmly to the site of the lesion.

正常情况下，循环中的血小板与血管壁内皮细胞层紧密接触但不发生黏附，是因为血管内皮细胞具有一定的活性功能，包括一些物理特性如血小板和内皮细胞膜均带有负电荷产生相互排斥作用以及生化作用如合成和释放血小板活化抑制剂。

In aged,the internal and external elastic membranes both disappeared,the subendothelial layer is evidently thickened,in which there are some smallblood vessels and local calcification can be seen occasionally.

而在大鼠冠脉不论幼年或老年，其内膜仅由内皮构成，无内弹性膜和内皮下层，因而从幼年至老年始终没有内膜增厚和管腔变窄现象。

In order to improve the stability and mechanical properties in moist state,the gelatin nanofibrous membranes were chemically crosslinked by 1-ethyl-3-dimethyl-aminopropyl carbo-diimide hydrochloride and N-hydroxyl succinimide.

采用1-乙基-(3-二甲基氨基丙基)碳二亚胺和N-羟基琥珀酰亚胺对明胶纳米纤维膜材料进行化学交联处理，改善了材料的耐水性、热稳定性和力学抗拉性能。

Novel Evidence for the Location of the PsbS protein within Photosystem ll supercomplex By sucrose density gradient centrifugation PSll-LHCll supercomplex was isolated directly from thylakoid membranes of soybean and wheat leaves and the PsbS protein was found in this supercomplex by immunoblotting with anti-PsbS antibody.

一PsbS定位于PSll超级复合体内的新证据用蔗糖密度梯度离心分离出大豆和小麦叶片的PSll超级复合体，并且在超级复合体中用PsbS抗体免疫检测到PsbS。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。