Molecular physicochemical parameters predicting antioxidant activity of Brazilian natural products

Physicochemical methods of investigating natural products.

INTRODUCTION When one reflects on the achievements of organic chemists who studied natural products more than twenty-five years ago, one cannot fail to be increasingly impressed. Then, structural determination involved a lengthy programme of extraction and purification, chemical degradation and synthesis. In the determination of purity, or proof of identity, a few simple properties were availab...

antioxidant and antimicrobial activity of allium jesdianum extract

چکیده بررسی فعالیت ضد اکسیدانی و ضدمیکروبی عصاره گیاه بن سرخ (allium jesdianum) به کوشش: زهرا مقیمی هدف از این تحقیق بررسی میزان ترکیبات فنولی کل، ترکیبات فلاوونوئیدی کل، فعالیت ضداکسیدانی و ضدمیکروبی عصاره ی گیاه تازه و خشک بن سرخ بود. استخراج عصاره به روش های غوطه وری، استفاده از همزن مغناطیسی، دستگاه مایکروویو، امواج فراصوت و گرمادهی مقاومتی و با استفاده از متانول، اتانول و آب به عنوا...

Physicochemical Properties of Natural Based Products versus Synthetic Chemicals

The majority of the currently used cosmetics and drugs are natural products-based compounds or their derivatives. This could add weight to the argument that natural based products are inherently better tolerated in the body than synthetic chemicals and have higher chance to be approved as new drugs. The present study was undertaken to analyze a natural product database compared to synthetic che...

Antioxidant -Rich Natural Products and Diabetes Mellitus

Antioxidant activity of co-products from guava, mango and barbados cherry produced in the Brazilian northeast.

Co-products from the juice processing of guava (CG), mango (CM) and barbados cherry (CB) were investigated with a view to their exploitation as a potential source of natural antioxidants. The ethanolic extracts were analyzed for total extractable phenolic content (TEP), DPPH radical scavenging activity (RSA-DPPH), ferric reducing antioxidant power (FRAP) and antioxidant activity in relation to ...