investigations of concentrated solutions of cellulose derivatives

the effect of the structure of solutions of cellulose derivatives on the structure and properties of products obtained from these solutions has been determined. in addition the effect of varying degrees of compatibility at the electron microscope level has been investigated, as well as relations between degrees of compatibility and mechan..

closed-boll cotton $em dash$ 3. effect of treatment with propylene oxide on sorptive and mechanical properties of fibers and yarns

cotton bolls were harvested at three stages before boll opening (closed bolls), and after opening on the plant (field-opened bolls) half of the closed bolls were maintained in the never-dried state; the remaining closed bolls were allowed to air-dry and open off the plant. never-dried closed-boll fibers, rewet dried closed-boll fibers, an..

today's tissue products $em dash$ how good are they?

this paper is accompanied by 22 slides which have been shown at the meeting of tappi. today's tissues and towels differ in absorbent capacity basis weight, $left double quote$ wipeability $right double quote$ , softness, feel and price. this paper reviews these factors by comparing specifically offerings of leading producers. among commer..

integration of a $left double quote$ thin $right double quote$ and a $left double quote$ thick $right double quote$ film resistor system on 96 alumina results in an optimized combination of two complementary technologies

a conventional silk screen printing process is used to deposit on a same alumina substrate $left double quote$ thin $right double quote$ (400 to 1400 a) and $left double quote$ thick $right double quote$ (100,000 to 200,000 a) resistive films. due to a 135 $degree$ c lower firing temperature of the metallo-organic paste used on the $left ..

engineer's role in an integrated production system

during the years of mechanizing cotton production to reduce labor and cost, solutions to many problems were of a temporary nature and many of them abused the land and environment where the authors produced the crop. the current trend by the chemical companies to package concentrated technical material in returnable containers at user leve..

dependence of stiffness and strength of gossypium hirsutum cotton on crystallite orientation

this paper shows how the crystallite orientation angle obtained from x-ray diffraction patterms can be used for varietal characterization of cotton at the molecular level. the 40 and 50 x-ray angles are usually taken as representative parameters to correlate with the strength of the fiber. although the 50 x-ray angle has some theoretical ..

calorimetric study of polyester/cotton blend fabrics $em dash$ 5. characterization of flame retardant action

calorimetric techniques have been used successfully for quantitative evaluation of flame retardant efficiency in textile materials. in addition, each of these techniques can also be used to study the mechanistic nature of the retardant action. for example, the heat of combustion of char measured by the oxygen bomb calorimeter provides som..

quantitative analysis of polymer blends using breadths of overlapping x-ray diffraction lines

methods of quantitative analysis of crystalline powder mixtures using x-ray diffraction (xrd) techniques are fairly well developed the analysis is relatively easy if the xrd pattern of the mixture exhibits component lines which do not overlap. in the reported study, a method has been developed to estimate the composition of a powder mixtu..

operating practices in carthage field

through the cooperative participation of operators in the carthage field, texas, a summarization of field completion practices has been prepared. this paper presents the results of a questionnaire to determine operator preferences in tubular sizes, cementing practices, electric log interpretation, perforating techniques, fracture design a..

effect of parameters of heat balance method upon irrigation water requirement of cotton plants

this paper discusses the effects of parameters of heat balance method upon the irrigation water requirement of cotton plants. two years of field experimental results are presented. 5 refs