Determination of the antioxidant capacity of two seagrass species according to the extraction method
Journal Title: Journal of Pharmacy & Pharmacognosy Research - Year 2016, Vol 4, Issue 5
Abstract
Context: There is a wide variety of methods for obtaining of plant extracts that enable a good yield of bioactive metabolites. For several years, extractive techniques have been perfected for obtaining natural extracts with powerful pharmacological properties. Aims: To determine the influence of various extraction methods (infusion, decoction, microwave, maceration with heat and agitation, and constant heat and agitation) on the content of solids, phenolic compounds and antioxidant capacity of marine angiosperms Thalassia testudinum Banks ex König (Hyrocharitacea) and Syringodium filiforme kützing (Cymodoceaceae). Methods: The soluble solids content was determined by the gravimetric method; total phenolic content, using Folin-Ciocalteu method, and the antioxidant capacity by 2,2-diphenyl-1 picrylhydrazyl (DPPH) method. Results: Results showed the effectiveness of extraction by decoction for T. testudinum and by microwave for S. filiforme, among the methods that use water as the extraction solvent. In the case those that use the hydroalcoholic mixture as solvent extraction, maceration with agitation and heat extraction showed the higher yields of soluble solids and total polyphenols, as well as a higher antioxidant activity for both species. Conclusions: Results showed the effectiveness of extraction by decoction for T. testudinum and by microwave for S. filiforme, among the methods that use water as extraction solvent. In the case those that use hydroalcoholic mixture as solvent extraction, maceration with agitation and heat extraction showed the higher yields of soluble solids and total polyphenols, as well as a higher antioxidant activity for both species.
A novel high-performance thin layer chromatography method for quantification of long chain aliphatic hydrocarbons from Cissus quadrangularis
Context: A high-performance thin layer chromatography (HPTLC) is an analytical technique, which can be used for the determination of constituents or marker components in various parts of the plants. Earlier studies have...
Effects of Sonchus asper and apigenin-7-glucoside on nociceptive behaviors in mice
Context: Sonchus asper is an important herbal medicine that traditionally used to treatment of digestive system infections and heart disease. Aims: To evaluate of anti-inflammatory and antinociceptive effects of Sonchus...
Evaluation of the ophthalmic and dermal irritability of the OLEOMASAJE formulation
Context: Ozonized vegetable oils present germicidal effects which can be used as active principle in different cosmetological compositions. The thematic about of the corporal massage advantage have been very treatment by...
Traditional uses of medicinal plants at Seropédica, Rio de Janeiro
Context: This work had as outcome to deal with the part of the population of Seropédica, Rio de Janeiro those who use the public health system and use alternative medicinal plants for the treatment of illness. Aims: To...
Determination of heavy metals in medicinal plants from the wild and cultivated garden in Wilberforce Island, Niger Delta region, Nigeria
Context: Adverse effects from herbal medicines may be partly due to the association of heavy metals with medicinal plants. Aims: To determine residual levels of Ni, Cr, Pb and Cd in nine selected medicinal plant species...