【摘 要】
：
依照传统看法纤维素的溶解度取决于纤维素的结晶度,结晶度越高,纤维素溶解度就越差。很多的纤维素溶剂均只具有有限的溶解能力,而水即属于这类溶剂。纤维素在水和水蒸汽中发
论文部分内容阅读
依照传统看法纤维素的溶解度取决于纤维素的结晶度,结晶度越高,纤维素溶解度就越差。很多的纤维素溶剂均只具有有限的溶解能力,而水即属于这类溶剂。纤维素在水和水蒸汽中发生膨润,该膨润值可以定量测定。比如用汽相吸附过程加以确定。原理是让水蒸汽渗透到纤维素无定形区,再视吸附的水
According to the traditional view of the solubility of cellulose depends on the degree of crystallinity of cellulose, the higher the degree of crystallinity, the worse the solubility of cellulose. Many cellulose solvents have only limited solubility, and water is a solvent of this type. Cellulose swells in water and steam, and the swelling value can be quantitatively determined. Such as vapor phase adsorption process to be determined. The principle is to allow water vapor to penetrate into the amorphous area of cellulose and then to the adsorbed water
其他文献
临床资料:患者,男,32岁。入院前6天食用鲜蕈半小时后出现意识不清、口吐白沫、8小时意识恢复,出现恶心、呕吐物为少量胃内容物,非喷射性,少尿,24小时尿量100～200ｍｌ,呈深黄色,双
Four recoverable and reusable ionic liquids based on 1,4-diazobicyclo[2.2.2]octane(DABCO) have been synthesized to catalyze the aza-Michael addition of secondar
涅高兹是俄罗斯钢琴学派的创始人,更是举世公认的钢琴教育名家。在长达半个多世纪的钢琴教学生涯中,形成了一套科学、丰富的钢琴教学思想。对于该思想的研究,不但能够获得对
Iodine and iodine compounds are widely applied in medicaments,dyes,energy materials,food additives etc.The development and utilization of iodine resources have attracted much attention.
A series of oxygen permeable dual-phase composite oxides 60 wt% Ce0.8Gd0.2O2-δ-40 wt% Ln Ba Co2O5+δ(CGO-LBCO, Ln = La, Pr, Nd,Sm, Gd and Y) were synthesized t
本刊讯《中国图书资料分类法》(第四版)的电子版已由中国科技信息研究所万方数据电子出版社制作完成，并于今年5月出版发行。该电子版是在科学技术文献出版社于2000年出版的《
A simple and efficient method for the synthesis of 9,9‐dimethyl‐9,10‐dihydro‐8H‐benzo‐[α]xanthen‐11(12)‐one derivatives (DDBXs) was developed by the co
A synergistic photocatalysis combined pulsed diaphragm discharge(PDD)system with TiO_2 nanofilm deposited on the surface of quartz diaphragm is developed for th
Affinity and ion exchange conventional chromatography have been used to capture erythropoietin(EPO)from mammalian cell culture supernatant.Currently,chromatogra
我院自１９９５年至１９９７年共成功地抢救了９２３名口服有机磷农药中毒患者，均一次性抢救成功。现报告如下：１临床资料本组９２例中，女６３例，男２９例，年龄最小者３岁，最大者６４岁，平均３３岁。服药时间最长者为１８ｈ，最少者为２０ｍｉｎ，昏迷患