The isolation of the soluble form of the Enterobacteriaceae common antigen from Salmonella montevideo was achieved by a combination of the phenol/water method and the phenol/chloroform/ petroleum ether extraction procedure. A phenol-soluble fraction highly enriched in the antigen was obtained which was further purified by DEAE-cellulose chromatography. A fraction eluted with 0.9 M ammonium acet...

Hydrogen sulfide (H2S) is a newly appreciated participant in physiological and biochemical regulation in plants. However, whether H2S is involved in the regulation of plant responses to drought stress remains unclear. Here, the role of H2S in the regulation of drought stress response in Spinacia oleracea seedlings is reported. First, drought stress dramatically decreased the relative water cont...

for determination of water stress effects in different growth stages of sugar beet and optimum water usage on quantity and quality of sugar beet, this study was performed using randomized complete blocks design in factorial experiment with 12 treatments and 4 replications from 1999 to 2001 in agricultural research center of hamadan. the first factor was non-irrigation in 3 stages of growth (s1-...

Water is a major constituent of food products even if it is present at a trace level as in white crystalline sugar. Molecular interactions between sugar and water are at the origin of structural as well as mechanical properties (density, compressibility, flow) of bulk sugar. Conditioning of white sugar is therefore difficult because it is sensitive to relative humidity and temperature of surrou...