It would be desirable to establish and standardize methods that can measure the total antioxidant capacity level directly from vegetable extracts containing phenolics. Antioxidant capacity assays may be broadly classified as electron transfer (ET)- and hydrogen atom transfer (HAT)-based assays. The majority of HAT assays are kinetics-based, and involve a competitive reaction scheme in which ant...

The interest in medicinal plants encourages new research studies on plant extracts, as they are sources for treatments medicine, agriculture, and veterinary. Calliandra tweedii is a native Brazilian species with broad use folk medicine. This study aimed to examine the leaf crude extract (CE) of C. its methanolic (MP) hexane (HP) phases concerning total phenolic compounds (TPC), proanthocyanidin...

Serbian soybean genotype Ana was gamma irradiated at doses of 1, 2, 4, and 10 kGy in order to evaluate the influence of gamma irradiation on isoflavone (genistein, daidzein, and their glycosides genistin and daidzin) contents and hydroxyl radical scavenging effect (HRSE). The increase in genistin and daidzin contents as well as antioxidant activities was observed especially at doses of 4 and 10...

In this study, the polysaccharide-riched extract from Ganoderma lucidum was obtained by different extraction methods including hot water (HWE), ultrasonic-assisted (UHWE), enzyme-assisted (EAE), and enzyme (UAEE). The total polysaccharide content in UAEE (3.721±0.134%) higher than HWE (1.783±0.156%), UHWE (1.886±0.148%), EAE (2.133±0.139%). G. then evaluated for antioxidant activity 2,2-dipheny...

Ankyropetalum extracts were obtained by using two different extractors (Soxhlet and ultrasonic bath). The phenol, flavonoid, DPPH, FRAP, antimicrobial activity properties of the investigated. In addition, fatty acid composition was determined in GC-MS. High values found A. reuteri gypsophiloides for total phenolic flavonoid contents, respectively. DPPH FRAP high arsusianum gypsophiloides, Bette...

Fruits, are in black or white colour Mrytus communis, is known as locally name murt, hambales, mersin. It an aromatic and medicinal plant that grows naturally maquis form regions with Mediterranean climate. We aimed to investigate the hypoglycemic effect antioxidant activity of Myrtus communis L. this research. White-black myrtle were collected from Hassa-Hatay Tarsus-Mersin, respectively Octob...

Bitter leaf, Vernonia amygdalina (VA), is used in various alternative medicine several countries, including Indonesia. This study aims to evaluate the antioxidant activity of VA leaves by three different vitro methods. The was evaluated radical scavenging 1,1-diphenyl-2- picryl-hydrazyl (DPPH), ferric reducing power (FRAP), and cupric capacity (CUPRAC). FRAP CUPRAC methods were expressed as mg ...

A series of N-ethyl phthalimide esters 4(a-n) were synthesized and characterized by spectroscopic studies. Further, the molecular structure of majority of compounds were analysed by single crystal X-ray diffraction studies. The X-ray analysis revealed the importance of substituents on the crystal stability and molecular packing. All the synthesized compounds were tested for in vitro antioxidant...

Microwave-assisted hydrodistillation was used to isolate an essential oil from the leaves of Cinnamomum iners Reinw. ex Bl., and the results compared with those obtained by conventional hydrodistillation. The composition of the oil from both methods was found to be similar, and (-)-linalool was found as the main component (30-50%). The antioxidant activity of the essential oil obtained by both ...