further studies on cellulose iii polymorphs. transformations to cellulose iv lattices and subsequent reactions

in the reported experiment, the preparation of cellulose iv polymorphs, their characterization using x-ray diffraction and infrared spectroscopy, as well as the effect of chemical treatments on these polymorphs have been investigated. cellulose iii//i and iii//i//i polymorphs, produced from celluloses i and ii using eda-meoh treatments, w..

polyelectrolyte behavior of chemically modified cotton cellulose

ion exchange and sorption of charged molecules such as dyes, crosslinking agent, etc. , by cotton cellulose very much depend on the charge on cellulose, which in turn is known to depend on the external ph of the medium. in order to understand the role of various fixed groups in cellulose in its polyelectrolyte behavior, the standard cellu..

filter cloth plugging and its effect on the filter performance

gradual plugging of cotton fabric filter cloths during the fitration of model surries of kieselguhr, perlite, caco//3, and caco//3 flocculated by additions of paa was studied. the increase in the filter media resistance was correlated with the number of filtration cycles being done on a given filter cloth without its regeneration. a relat..

wetting properties of nonionic surfactants of homogeneous structure c//1//2h//2//5(oc//2h//4)//xoh

in the reported experiments, the wetting of cotton skeins by aqueous solutions of individual surfactants has been measured at various temperatures using the draves technique. an individual compound with a homogeneous polyoxyethylene head group is a more effective wetting agent than a poisson distribution mixture with the same average numb..

rapid analysis for aflatoxins in cottonseed products with silica gel cartridge clean-up

a proposed rapid and versatile method of analysis for aflatoxins in cottonseed products using waters associates' sep-pak silica cartridge clean-up is presented. samples are extracted with acetonitrile/water azeotrope and a filtered aliquot is evaporated to dryness. a toluene/acetonitrile (96:4) solution of the dry extract is applied to a ..

gas chromatographic analysis of cyclopropenoid acids in cottonseed oils

a gas chromatographic method of analysis for cyclopropenoid acids in cottonseed oil, as the methyl esters, is described. with a glass column packed with a methyl silicone substrate on an inert support, methyl sterculate and methyl malvalate can be chromatographed without decomposition. although methyl malvalate was not well resolved from ..

simultaneous analysis of bha, tbhq, bht and propyl gallate by gas chromatography as extracted from refined vegetable oil

a method has been developed for the simultaneous gas chromatographic (gc) analysis of 4 phenolic antioxidants extracted from refined cottonseed oil. the antioxidants in the study were butylated hydroxyanisole (bha), tertiary butyl hydroquinone (tbhq), butylated hydroxytoluene (bht), and propyl gallate (pg). the method involves extraction ..

review of lecithin chemistry and glandless cottonseed as a potential commercial source

industrial lecithin can be fractionated as phospholipids and glycolipids after neutral lipids and protein-containing contaminants are removed. the polar lipids are very reactive and are difficult to extract and purify from oilseeds. their purity and special properties can be improved by a number of methods including solvent fractionation,..

evaluation of peanut and cottonseed oils for deep frying

a comparative study of cottonseed and peanut oils for frying of potato chips was undertaken. industrial scale frying was conducted for 5 days with cottonseed and 5 days with peanut oil and frying oils and chips were sampled twice a day. frying oils and oils extracted from stored chips were analyzed for ultraviolet absorption (a//2//3//2 a..

studies on bound water of cellulose by differential scanning calorimetry

in the reported experiments, the crystallization and melting of adsorbed water on cellulose samples such as cotton, kapok, linen, jute, various rayons, and wood cellulose have been studied using a differential scanning calorimeter (dsc). two exothermic peaks of crystallization of adsorbed water on the cellulose samples are observed. one i..