The effect of different additives on the properties of water and oil absorption as well as the maximum load of wheat flour tableware was studied by using liquid paraffin and stearic acid as waterproof agents , sodium alginate and carboxymethyl cellulose sodium ( cmc - na ) as intensifier 摘要以液态石蜡和硬脂酸作为防水剂，以海藻酸钠和羧甲基纤维素钠作为补强剂，研究不同添加剂对小麦粉餐具的吸水性、吸油性和最大承载等使用性能的影响。
Taking the brown alumina powder and french chalk as the refractory , the silicasol and dextrin as the composite binder , the western bentonite and sodium carboxymethyl cellulose ( cmc ) as the composite suspension agent , the optimum mixing ratio of the water - based coating was established by the method of orthogonal experiments 摘要选用棕刚玉粉及滑石粉为耐火填料，以硅溶胶及糊精为复合粘结剂，以钠基膨润土和羧甲基纤维素钠( cmc )为复合悬浮剂，通过正交试验方法确定了最佳配方。
3 . 2 . 1 . 4 ) which was prepared by precipitation of the water extract of the culture of aspergillus niger with ammonium sulfate and desalted by sephadex g - 25 , and was further fractionated by two steps of deae - toyopearl 650m and one step of poros 20pi chromatography . the other was a p - glucosidase ( ec . 3 . 2 . 1 . 21 ) which was prepared by the above g - 25 fractions and was further fractionated by two steps of deae - toyopearl 650m chromatography . the specific activity of the endoglucanase with sodium carboxymethyl cellulose was estimated to be 433 . 38 hj / mg -葡萄糖苷酶对水杨素的比活力为597 . 12iu mg ，并对其专一，不能水解棉花和羧甲基纤维素钠；分子量为117 . 5kda ，加dtt后分子量不变；该组分最适ph和温度分别为4 . 5和70 ，在ph5 . 0 、 50下对水杨素钠的米氏常数km为3 . 73mg ml ，最大反应速度vm为0 . 088mg葡萄糖( ml ? min ) ；与文献中从黑曲霉中分离的-葡萄糖苷酶比较后发现，该组分是一个新的-葡萄糖苷酶。
Puyang puzhong chemical co . , ltd is mainly produces carboxymethyl cellulose and thiourea dioxide and auxiliary agent of petroleum . it was founded in 1998 , and today , it has developed into a high - tech non - government cooperation combined with researching , producing marketing . our company has advanced equipments , technicals and management . at the same time , . we also owns the operation right of import export business 濮阳市濮中化工有限公司创建于1998年，是从事羧甲基纤维素钠carboxymethyl cellulose英文缩写“ cmc ”二氧化硫脲thiourea dioxide油田助剂等集科研开发生产制造市场营销为一体的高科技民营企业。
The dispersity and stability of the graphite aqueous suspensions was investigated with centrifugation , the violet visible spectrophotometer , the laser particle size analyzer and scanning electron microscopy ( sem ) . the following aspects of the production technique were carefully studied : 1 . the effects of surfactants , poly ( vinyl alcohol ) ( pva ) , poly ( vinyl pyrrolidone ) ( pvp ) , sodium alginate ( sa - na ) and poly ( sodium acrylate ) ( pa - na ) on the suspension stability of graphite were investigated 本研究的主要内容有以下三个方面: 1 、研究了阴离子表面活性剂、非离子表面活性剂、聚乙烯醇( pva ) 、聚乙烯基吡咯烷酮( pvp ) 、海藻酸钠( sa - na ) 、聚丙烯酸钠( pa - na )对石墨在水中分散性和稳定性的影响; 2 、研究了分散方法、分散介质、 ph值及羧甲基纤维素钠( cmc )含量对石墨在水中分散性和稳定性的影响; 3 、研究了聚乙烯醇( pva ) 、聚乙烯基吡咯烷酮( pvp ) 、海藻酸钠( sa - na ) 、聚丙烯酸钠( pa - na )四种助分散剂与羧甲基纤维素钠( cmc )复配对石墨在水中分散性和稳定性的影响。
