PHYSICO-CHEMICAL STUDIES ON RUBBER VULCANIZATION

Vulcanization and the Properties of Rubber

Rubber is composed of long stringlike polymer molecules, which are pinned together at random points by crosslinks. As the density of crosslinks is increased, the molecules get localized and the system undergoes a phase transition from a liquid to an amorphous solid state. The elastic properties of the resulting solid are very different from those of metals, and are primarily due to changes in t...

Physico-chemical studies of the Gum Acacia

Gum acacia is a potent drug having diverse pharmacological effects and wide therapeutic potential. It is used in diarrhoea and dysentery, irritations and ulcers of the stomach and intestine. It is also used in haemoptysis, bleeding piles, menorrhagia, leucorrhoea and spermatorrhoea. Keeping in view the high medicinal importance physico-chemical studies of the drug obtained from Dawakhana Tibbiy...

Cclix. Physico-chemical Studies of Lipoids

The Studies on the Physico-Chemical and Organoleptic Characteristic

A highly significant effect (p<0.05) of storage period on physico-chemical characteristics and sensory parameters of Apricot fruit produced in Rawalakot areas of Azad Jammu and Kashmir was investigated at ambient temperature (Relative humidity 60-63% and temperature 28-30 C). The physicoo chemical characteristics such as weight loss, total soluble solids, titratable acidity, ascorbic acid and s...

Physico-chemical Studies on Stability of Clopidogrel Tablet Formulations

Clopidogrel bisulphate (anti-coagulant drug) is an enantio-selective chrial drug and needs to be monitored for the active form in tablet formulation. Hence, a stable tablet formulation was developed for clopidogrel using two different disintegrants of LHPC (to match as closely as possible to innovator tablet) and PVPP XL. Tablets were evaluated for stability analysis using validated analytical ...