timing of nitrogen fertilizer application: the case of cotton production in the united states

this paper concerns factors affecting a farmer's decision about the timing of nitrogen fertilizer application. these factors include expected nitrogen loss associated with different application times, expected seasonal fluctuations in nitrogen fertilizer prices and operating costs, and the perceived risk of not being able to apply nitroge..

laminating resol varnishes made with crude multivalent phenol

during the carbonization process of a lignite source available in the southern part of india, a very cheap byproduct, crude multivalent phenol, was obtained. this crude consisting of substituted phenols and carbonaceous pitch was distilled to get a pitchfree distillate of about 60 yield. the distillate mixture was used along with other ph..

effect of different binders on properties of particle board from cotton seed hulls with emphasis on water repellency

boards were prepared from cotton seed hulls with urea formaldehyde and phenol formaldehyde binders in different amounts, phenol formaldehyde at 5 by weight was the optimum binder. (author abstract) 9 refs

electrospray mass spectrometry for characterization of lipid a from enterobacter agglomerans

negative ion and positive ion electrospray mass spectrometry have been employed to characterize the lipid a mixture produced by hydrolysis of lipopolysaccharides from enterobacter agglomerans, a gram-negative bacterium commonly found in field cotton. neutral monophosphoryl lipid a molecules form stable anions via deprotonation, but adduct..

qualitative method for triglyceride analysis by hplc using an evaporative light-scattering detector

a rapid high-performance liquid chromatographic method for the separation and identification of several triglycerides in edible oil and fat samples using an evaporative light-scattering detector (elsd) is described. a single 25 cm hypersil c-18 column maintained at 35 $degree$ c was used successfully to analyze and identify a variety of t..

microstructural evolution in rapidly solidified al-fe alloys an alternative explanation

the solidification sequences in aluminum containing 8 and 16 wt pct iron are described in terms of the formation of metastable and stable primary intermetallic phases. these alloys were studied in the chill-cast and splat-quenched conditions, and marked differences in microstructure due to the different cooling rates were observed contrar..

determination of water content of plant leaves by beta attenuation

the method of determination of absolute water content of a plant leaf, based upon the measured relative intensities and the mass attenuation coefficient of $beta$ -particles from **2**0**4tl through the fresh and dry leaves of the plant, is described. moisture content of plant leaves of cotton, sunflower, mung and spinach as estimated by ..

genes for jeans. biotechnological advances in cotton

cotton is a crop of global economic importance. the impact of advances in cotton genetic engineering will therefore go beyond just altering the patterns of agronomic practice to have a major effect on both economic and social structures. although the majority of characteristics currently being engineered into cotton (i.e. insect and herbi..

thermal, spectral and morphological studies on cellulose, cellulose ethylthiophosphate and its metal complexes in air

metal complexes of thiophosphorylated cellulose, when heated, give rise to high char yields. these and related observations suggest that such derivatization may give rise to novel flame retardant treatments for cellulosic materials. the kinetics of thermal degradation of cellulose, cellulose ethylthiophosphate (cesp) and metal complexes o..

hardware scaleup procedures for p/c life support systems

this paper compares scaleup correlations developed at the jet propulsion laboratory (jpl) and at the langley research center (larc) for various life support hardware to estimate mass, volume, and power consumption values as a function of feed or product mass flow rates the scaleup correlations are provided for a few selected advanced life..