Quantification and Evaluation of Antioxidant Activity of Some Bioactive Phytochemicals in Different Medicinal Plants

Abstract

Abstract:The present study was carried out to determine the concentration of some bioactive phytochemicals (ascorbic acid, carotenoids, total phenolics, protein and carbohydrate) and their antioxidant activity in the some medicinal plants. To screen out the plants, as well as their parts having higher antioxidant activities, all main parts of plants were screened. Out of thirteen plant samples, ethanolic leaf extract of T. belerica showed minimum IC 50 for free radical scavenging capacity (0.08 mg/ml), superoxide anion radical scavenging activity (0.39 mg/ml), lipid peroxidation (0.31 mg/ml) and ferric thiocyanate chelation activity (0.89 mg/ml) as well as high reducing power (0.31 ASE/ml) capacity. We can infer that the parts of plant having high content of phytochemicals may serve as a good source of nutraceuticals which have potential for use in health care formulations.

Effects of drying temperature on the bioactive and technological properties of turmeric (Curcuma longa L.) flour

“…Carotenoid contents were significant at temperatures of 45 °C and 55 °C, with wide variation, ranging from 5.9 μg g -1 to 14.88 μg g -1 . Singh (2012) observed for mature rhizomes and immature rhizomes of C. longa values of 0.47 μg g -1 and 0.66 μg g -1 in ethanol extract, lower than the values found in this study in petroleum ether extract. This may be related to the fact that carotenoids are a class of natural liposoluble compounds, with potential antioxidant properties in plants due to their chemical structure, and are also part of the antioxidant defense system in the human body.…”

“…In the food industry, it is used as a natural dye to replace synthetic dyes in products such as canned, chutneys, mustard, bread, yogurt, butter, cheese, among others, but the most important use is in curry preparation (Pereira & Stringheta, 1998;Osorio-Tobón et al, 2014;Borah et al, 2015). There are several studies related to turmeric rhizomes about the properties and uses, such as therapeutic, antimicrobial, antifungal, insecticide, anti-inflammatory and antioxidant properties (Singh, 2012;Khattak et al, 2005;Kita et al, 2016). Curcumin has anticancer, antiviral, antiarthritic, anti-amyloid and anti-atherosclerotic properties (Buduma et al, 2016), The rhizome is often used to treat gastric ulcers, parasitic infections, skin disorders, sprains, joint inflammation, and cold and flu symptoms (Harsha et al, 2016).…”

Atividades antioxidante, antimicrobiana e compostos fenólicos de extratos comercial e in natura de Curcuma longa

“…O extrato da cúrcuma em pó (CP) apresentou maior atividade antioxidante (IC 50 0,068 mg/g) e maior teor de compostos fenólicos totais (30,4 mgEAG/g extrato) quando comparado com extrato obtido do rizoma in natura (IC 50 0,083 mg/mL) e fenólicos totais (28,0 mgEAG/g extrato). Os resultados de atividade antioxidante estão diretamente relacionados com dos resultados de compostos fenólicos totais, pois os compostos fenólicos, que são formados por um ou mais anéis aromáticos e com pelo menos Tabela I -Atividade antioxidante dos extratos alcoólicos da cúrcuma em pó e rizoma da cúrcuma in natura SINGH et al (2012) avaliaram os teores de diferentes substâncias em folhas, rizomas maduros e rizomas imaturos de C. longa e o teor de fenólicos totais de 27,42 mgEAG/g. Já Gomes (2018) obteve 196 e 20 mgEAG/g para os extratos em etanol e em hexano, respectivamente, sendo que o valor obtido para o extrato em etanol mostra que 19,6% do extrato equivale à ácido gálico.…”

Developing a commercially viable process for an Active Pharmaceutical Ingredient, Challenges, Myths and Reality in the Art of Process Chemistry

“…Furthermore, by using in vitro screening assays, medicinal plants extracts can be ranked for potency [47], increasing the likelihood that a therapeutic dose may be achieved following consumption.…”