ab initio evaluation of hyperfine-structure electronic parameters in the iron atom

in the frame of the effective-operator technique applied to atomic hyperfine structure in the $l-script$ **n $l-script$ $prime$ configurations the electronic hfs parameters relevant to the two-body far-configuration-mixing effects on the (3d**7 **4f, 4s)**3**,**5f terms of the iron atom were computed ab intio by means of the mchf method. ..

determination of glutamine and asparagine by isocratic elution reverse phase liquid chromatography with fluorescent detection

a method was developed specifically for the determination of glutamine and asparagine in the presence or absence of other amino acids. the amino acids were derivatized by o-phthalaldehyde/2-mercaptoethanol and separated by isocratic elution with a mobile phase consisting of acetonitrile and sodium acetate buffer. an application of the met..

application of tlc chemical confirmatory tests to minicolumn chromatography of aflatoxins

the minicolumn (mc) proposed by c. e. holaday and j. lansden was developed with a standard aflatoxin solution and with the extracts of corn, rice, wheat, cottonseed, peanut cake and black pepper, each having a different level of aflatoxins. one-half ml each of 2,4-dinitrophenylhydrazine, p-anisaldehyde, 20 h//2so//4, 20 hcl and trifluoroa..

comparative study of batch and continuous refining of cottonseed oil in the sudan

this study is concerned with a comparison of some technical aspects regarding batch vs continuous refining (centrifugal alkali refining) of crude cottonseed oil. implication of processing modes was examined in light of their effect on the following performance criteria: (a) percentage of refining loss as a function of the initial crude-oi..

adsorption of direct dye on cellulose in the presence of sodium alginate: the effect of molecular size of sodium alginate on dye adsorption

in this article, the adsorption of the dye c. i. direct yellow 12 on cotton in aqueous solution of sodium alginate with various molecular weights is reported. the effect of molecular size of sodium alginate on the dye adsorption has been examined based on a multiple equilibrium model. the results indicate that the equilibrium adsorptions ..

solubilities of six cottonseed oil fatty acid methyl esters in methanol

solubilities of six cottonseed oil fatty acid methyl esters in methanol have been determined. the esters were: methyl oleate, methyl linoleate, methyl malvalate, methyl dihydromalvalate, methyl sterculate and methyl dihydrosterculate. the solubility/temperature data are presented in graphical and tabular form. solubility data of fatty aci..

low-frequency vibrational spectra and structure of cellulose and cellulose acetates

investigations of the low-frequency (150-400 cm** $minus$ **1) ir spectra and raman spectra of cellulose and acetylcellulose specimens with different degrees of structural order: natural cotton cellulose, microcrystalline cellulose (highly ordered), natural cotton cellulose treated with ammonia (disordered), and cellulose triacetate (cta)..

effects of processing and chemical characteristics of plant oils on performance of an indirect-injection diesel engine

engine performance curves were obtained for crude, degummed, and degummed-dewaxed sunflower oils and for crude, degummed, and alkali refined cottonseed oils using a single-cylinder, precombustion chamber design diesel engine. crude oils gave very poor performance and are considered unsuitable for use as alternative diesel fuels performanc..

alfatoxin distribution in fines and meats from decorticated cottonseed

nine samples of fuzzy cottonseed potentially high in aflatoxin were separated into hulls, fines and meats. assays for aflatoxin on triplicate 50-g portions from fines (small, dry particles of kernels) and meats from each of the nine samples indicated a marked concentration of toxin in the fines. on average, there was a 17-fold difference ..

evaluation of cotton canopy temperature to detect crop water stress

the purpose of this paper is to report the use of cotton canopy temperature measurement to detect crop water stress which results from both soil water deficits (matric potential stress) and soil water salinity (osmotic potential stress). canopy and air temperature difference, in conjunction with ambient vapor pressure measurements, formul..