聚乙烯醇

Polyvinyl alcohol acetalizing conjugated olefine aldehyde; starch; crolein; crotonaldehyde; reaction mechanism

工程科技I，化学，高分子化学聚乙烯醇缩共轭烯醛；淀粉；丁烯醛；丙烯醛；反应机理

Methods Sixty-five cases of uterine fibroids were treated by using Seldinger's method,superselcet to embolize both uterine arteries with PVA.

65例病人采用Seldinger技术一侧经皮股动脉插管，超选择至双侧子宫动脉，用聚乙烯醇微粒栓塞。

The effect of kind of crosslinking agents, the glyoxal dosage, the crosslinking reaction temperature and the crosslinking reaction time on films properties were discussed.

制备了低酯化度玉米淀粉醋酸酯(DS.2)/聚乙烯醇可降解复合膜，重点讨论了交联剂的种类、用量、交联反应温度及时间片复合膜力学性能和耐水性的影响。

BACKGROUND: Sponge paste made of polyvinyl alcohol polymer foam has biocompatibility, and properties of hemophagia, imbitition, and wound protection.

摘要背景：聚乙烯醇开孔型泡沫塑料具有生物相容性、吸血、吸液、保护伤口等特性，用其制成的聚氟乙烯海绵贴拟用于创伤止血材料。

Therefore, on the tyingor pressure tightness, after the book block glued on, such as PVA flameretardant synthetic resin glue, as a result of back-and-glue absorption will be formed when a certain amount of expansion and make the following is issued on virtual spine of incrassation, it should first be used book compactor, later when he was on the cover of dvysocket students'computer package, so that the spine is firm and materials deformation-induced backs wrinkles.

所以，对捆压紧实后的书芯，上背胶（如PVA聚乙烯醇合成树脂胶）后，由于书背吸胶水后会产生一定量的膨胀而使书脊增厚发虚，故应先用压书机压实，尔后上机包糊封面，这样书脊就比较紧实，防止受压变形引起的书背皱纹。

The experiment result shows that favorable colour development performance can be achieved for the adhesive with polyvinyl alcohol as major component and the waterproof quality can be improved when the carboxyl tetraphene latices was mixed into the adhesive in a certain proportion.

实验发现，使用聚乙烯醇为主体的胶粘剂可使热敏纸获得良好的发色性能，胶粘剂中混入一定比例的羧基丁苯类胶乳可以使热敏纸的防水性能得到改善。

The experimental results show that when the low temperature adhesive polyvinyl alcohol is 0.5%, the high temperature adhesive silicasol is 0.5%, water reducing agent calcium lignosulphonate is 0.5%, rheologic agent Suzhou clay is 1.5%, the best dispersive slurry can be obtained by adding 0.9 weight percent of TMAH.

结果表明，在粘结剂聚乙烯醇加入量为0.5%，减水剂木质素磺酸钙加入量为0.5%，流变剂苏州土加入量为1.5%时，调整分散剂的加入量，当浆料中分散剂四甲基氢氧化铵的质量分数为0.9%时，可获得具有较佳分散性能的浆料。

The protection layer is a layer of polyvinyl alcohol oxygen, mainly to the oceans that oxygen on monosomic or oligmer inhibition.

爱护层是聚乙烯醇隔氧层，次给是用于隔绝氧不对单体或齐聚物的阻聚功用。

A new fluorescence quenched method has been found for determination of trace of gold based on the formation of nonfluorescent ternary complex Au- TBT -APDC.The composition ratio of Au to ligandi is 1:2:2.Under the optimum conditions,the linear range of the calibration curve is from 0 to 160ng Au/ml.

本文研究了在聚乙烯醇存在下，金与曙红、吡咯啶二硫代氨基甲酸形成三元络合物的合宜条件，并据此建立了水相荧光熄灭测定痕量金的新方法。

The lignin-quaternary/polyvinyl alcohol composite resin was made from lignin after phenolization and amination,using glutaraldehyde as cross-linking agent,PVA as carrier.

利用木质素为原料，经酚化、胺化改性后，以戊二醛为交联剂，聚乙烯醇为载体，合成了季铵型木质素/PVA复合阴离子交换树脂。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。