antioxidants are compounds which can prevent biological and chemical substances from oxidative damage by reactive oxygen species. flavonoids are the most important class of polyphenolic compounds that because of their antioxidant characters possess biological activities and pharmacological effects. chrysin-6-c-fucopyranoside and chrysin-3-malonyl-6-c-fucopyranoside are mono c-glycosyl derivativ...

The calculation of the standard enthalpies of vaporization, sublimation and solvation of organic molecules is presented using a common computer algorithm on the basis of a group-additivity method. The same algorithm is also shown to enable the calculation of their entropy of fusion as well as the total phase-change entropy of liquid crystals. The present method is based on the complete breakdow...

The thermal denaturation of aspartate transcarbamoylas of Escherichia coli was investigated by differential scanning calorimetry. Isolated regulatory and catalytic subunits were heat denatured at 55 and 80 degrees C, respectively. In contrast, the intact enzyme was denatured in two steps. A small endotherm near 73 degrees C was assoicated with denaturation of the regulatory subunits and the maj...