نتایج جستجو برای: Cuprammonium rayon
تعداد نتایج: 894 فیلتر نتایج به سال:
This preliminary study developed a novel cellulose pretreatment method for cost-effective cellulosic utilization using a modified cuprammonium solution as a solvent to dissolve cellulose followed by molecular oxygen/Fenton depolymerization. The modified cuprammonium solution is composed of cuprammonium solution and a special catalyst that could efficiently enhance cellulosic oxygen sensitivity ...
This paper applied a simple and cost-benefit method for the production of regenerated bacterial cellulose. The inexpensive production of cellulose with complex media derived from wastewater from food industries such as molasses adds a lot of contaminants to the produced bacterial cellulose, which puts a lot of challenges in cellulose purification. Therefore, the present study aimed...
Abstract The molar masses and mass distributions of three commercial regenerated cellulose samples, viscose rayon, Tencel, Bemliese (or cuprammonium nonwoven), have been determined by dissolution in 8% (w/w) lithium chloride/ N , -dimethylacetamide (LiCl/DMAc) subsequent size-exclusion chromatography with multi-angle laser-light scattering detection (SEC/MALLS). Before LiCl/DMAc, the samples we...
When cellulose, soluble starch, and glycogen are dissolved in cuprammonium hydroxide solution, copper-carbohydrate complexes are formed which exhibit high levo optical rotation. There are, however, glucopyranoside polysaccharides which do not show this behavior. Laminarin, a polysaccharide isolated from the seaweed Lam&aria digitata, gives a low dextrorotation. The dextran produced by Leuconost...
BACKGROUND The operative control of noncompressible hemorrhage is the single largest impact that could be addressed in reducing the mortality on the battlefield. Laprotomy pads, traditionally used for hemorrhage evacuation, are made of woven cotton, and, while effective, their use requires a substantial amount of space and adds weight. This poses no concern in traditional operating rooms but is...
BACKGROUND In clinical studies, it has been difficult to evaluate the influence of haemodialysis (HD) parameters on HD clearance (CL(HD)) and reduction rate (RR) of non-ionic contrast medium during HD sessions. We therefore predicted clinical values of CL(HD) and RR of iopromide, a non-ionic contrast medium, from findings obtained from in vitro experiments, and confirmed that these predictive v...
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