聚乙烯

The increasing of crosslinking extent in polyvinyl butenal had more contribution to adhesive strength of its aqueous solution than enhance of the acetalization degree.

在聚乙烯醇缩丁烯醛中发现，交联程度的提高比缩醛度的提高对其水溶液粘接强度的影响更大。

The paper introduces the formula, process and tensile strength of the organic-inorganic composite adhesive which is prepared by mixing acetalization of polyvinyl alcohol with silicasol.

叙述了以聚乙烯醇为原料，经缩醛化后和硅溶胶制备有机—无机复合粘合剂。介绍了配方、备程序和拉伸粘结强度的试验结果。

GA and BASANa were used as cross-linkers and a donor of hydrophilic groups (-SO3H), which they both crosslinked to PVA chains for the acetalization reaction.

GA和BASANa皆接在聚乙烯醇链上产生acetalization反应，并分别当做交联剂和提供磺酸根基(-SO3H)的亲水基。

Chemical experiments and carbon nuclear magnetic resonance studies showed that there were two addition manners,l,2-and l,4-additions when α-butenal,as an unsaturated aldehyde,conducted an acetalization reaction with polyvinyl alcohol.

化学分析法及碳核磁共振研究表明，作为不饱和醛的α-丁烯醛与聚乙烯醇在水溶液中进行缩醛化时存在着 1，2-加成与1，4-加成两种反应方式。

According to the tissue engineering, porous hydroxyapatite scaffold biomaterial is prepared by the immersion method using organic foam. The effects of pretreatment, the content of agglomerant PVA and HA on the porosity of this material are investigated.

采用有机泡沫法制备了多孔羟基磷灰石支架，考察了水解预处理工艺、粘结剂聚乙烯醇和固相HA的含量对孔隙率的影响，利用扫描电子显微镜观察了支架的孔结构。

A minimum of 60 cm drum sized agglomerator can handle 100 kg/hour polyethylene.

至少有60厘米大小的鼓agglomerator可以处理100公斤/小时聚乙烯。

BACKGROUND: The chief domestic alloplastic material implantation used in augmentation rhinoplasty is silicone rubber. Other materials used are porous highdensity polyethylene and expanded polytetrafluoroethylene (e-PTFE, Gore-Tex).

背景：加高型鼻整形手术中使用的人工合成异体填充物在国内主要以矽胶为主，其它还有膨体聚四氟乙烯(expanded polytetrafluoroethylene， e-PTFE， Gore-Tex)和多孔高密度聚乙烯(porous high-density polyethylene， PHDPE)等。

Methods and Results— We synthesized the 3 components of a gene vector binding complex:(1) A poly allylamine bisphosphonate with latent thiol groups,(2) a poly ethyleneimine with pyridyldithio groups for amplification of attachment sites , and (3) a bifunctional (amine- and thiol-reactive) cross-linker with a labile ester bond.

方法和结果—我们综合了基因复合物载体的三种成分：(1)巯基聚丙烯胺二碳磷酸盐化合物，(2)能扩增结合位点聚乙烯亚胺-pyridyldithio复合物，(3)具有不稳定酯键的双功能交联剂。

The introduction of amido groups can efficiently increase the water swellability of polyvinyl alcohol film and simultaneously enhance the adsorbability of the film to heavy metal ions.

胺基的引入有效的增强了聚乙烯醇膜的水溶胀性，同时使得膜对重金属离子的吸附能力有很大的提高。

Polyvinyl alcohol amidoxime chelate fiber was synthesised by pre irradiation graft copolymerization and amidoximation.

利用60Co－γ射线预辐照接枝和胺肟化反应合成了含羧基的聚乙烯醇胺肟螯合纤维。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新