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A novel, rapid and cost-effective chlorpromazine hydrochloride (CPZH) decolorization assay is described for the screening of antioxidant activity. A chromogenic reaction between CPZH and potassium persulfate at low pH produces an reddish-pink radical cation with maximum absorption at 527 nm in its first-order derivative spectrum. The antioxidant capacity of standard solutions of an antioxidant was evaluated by comparing with the inhibition curve using Trolox as the standard. Comparison of antioxidant capacity determined with this newly developed CPZH assay and with the well-known 2,2'-...

The chemistry of antioxidants has developed rapidly. Natural and synthetic antioxidants found their various applications in petrochemical industry,cosmetics, food industry, and rubber industry and in medicines. This book will be of immense value to students, practicing professionals and others to learn something about the importance of antioxidants. This book is unique in this sense that it elucidates the role of spectrophotometry in evaluating the antioxidant potential of natural and synthetic compounds. In addition, it will give you an idea to identify the class of natural products by...

Exposure of heavy metals to humans has risen continuously through the contaminated diet. The objective of the research is to determine the concentration of Cu, Cr, Ni, Pb, Co and Cd in dry fruits. Ten samples of dry fruits i.e Almond (P. amygdalus), Hazelnut (C. Vellanus), Dates (Phoenix dactylifera), Cashew nuts (Anacardium occidentale), Walnuts (Juglans nigra), Raisins (Vitis Vinifera), Peanuts (Arachis hypogeaea), Apricot (Prunus armeniaca), Figs (F. macrophylla) and pistachio (P. Vera) was collected and studied the effect of microwave roasting and storage on heavy metal concentration.

Xylanase enzymes are group of enzymes that can degrade Xylan present in plants. Xylan lignin and cellulose formed a complex matrix in plants. Lignin imparts colour to cellulose and thus eventually imparts colour to paper and pulp. Xylanase facilitates the removal of lignin from the paper pulp thus improves the brightness of paper. Xylanase was produced by Aspergillus niger using different carbon sources. UV irradiation of Aspergillus niger slightly improves the Xylanase activity than native Aspergillus niger. Twenty minutes exposure of Aspergillus niger to UV irradiation was considered...