biginelli-type pyrimidines contain an interesting moiety which has attracted considerable attention of medicinal chemists in the last few decades. despite the very diverse pharmacologic effects ascribed to this kind of pyrimidines, there are few reports on the antioxidant evaluation of biginelli pyrimidines. in this study synthesis of some novel biginelli-type pyrimidines is reported. the prepa...

BACKGROUND Recent investigations have shown that the antioxidant properties of plants could be correlated with oxidative stress defense and different human diseases. In this respect flavonoids and other polyphenolic compounds have gained the greatest attention. The plant Cytisus scoparius contains the main constituent of flavone and flavonals. The present study was undertaken to evaluate the in...

The effects of Conventional Heating (CH) and Microwave Irradiation (MWI) pre-treatment of Egg White Proteins (EWPs) on antioxidative activity of their hydrolysates prepared with pepsin were investigated. MWI pretreatment of EWPs resulted in a higher degree of hydrolysis (DH) and the highest hydroxyl radical scavenging activity (40.67±1.30%), superoxide anion scavenging activity (75.53±2.79%), i...

Annona squamosa has extensively been used in the traditional and folkloric medicine and found to possess many biological activities. Different solvents, petroleum ether, chloroform, ethyl acetate and methanol extracts of Annona squamosa seeds (ASPE, ASCH, ASEA, ASME) have been used to prepare plant extracts. The present investigations dealt with the free radical scavenging activity of four extr...

The antioxidant activity and phytoconstituents of the hydromethanolic extract of Litchi chinensis (HELC) fruit was explored in the present study. The antioxidant potential of extract has been evaluated using several antioxidant models and results were compared to standards. Fruit extract showed effective reducing power and free radical scavenging activity in a dose-dependent manner. In case o...

In the present study, antioxidant properties of flavonoids and polysaccharides from tobacco (Nicotiana tabacum L.) leaves were evaluated in several in vitro systems, e.g., scavenging activities on hydroxyl, superoxide anion, 1,1-diphenyl-2-picrylhydrazyl (DPPH) and 2,2'-azino-bis(3-ethylbenzthiazoline-6-sulphonic acid) (ABTS) radicals, and reducing power. Flavonoids showed much better activity ...

To study the antioxidant capacity of the exopolysaccharides peptides (EPSP) from Ganoderma lucidum, four methods including 1,1-diphenyl-2picrylhydrazyl (DPPH) radical scavenging assay, reducing power assay, self-oxidation of 1,2,3-phentriol assay and hydroxyl radical assays were employed in vitro. The sample demonstrated scavenging capacity in a dose-dependent manner in every assay. Among them,...

Leaves of Premna integrifolia belong to Verbanacea is an important rasayana drug in ayurvedic medicine and are considered to be useful in the treatment of variety of ailments. The present study was aimed to assess the for its antioxidant activities. The flavonoid rich fraction, showed antioxidant activity was evaluated using the superoxide scavenging, anti lipid peroxidation, hydroxyl radical s...

lemon verbena (lippia citriodora) belongs tothe verbenaceae (shahpasand) family.l.citriodora is chemical  composition of the leaves plant have antimicrobial properties, refrigerant,anti-headaches one-sided, anti- pains nerve and housing, carminative, helping to digestion, relaxation, dizziness, colds therapy,  memory booster and etc.  in this study, phenolic compounds of l.citriodoraleaves were...

Phenolics were extracted from litchi fruit pericarp (LFP) tissues, purified and their antioxidant properties analyzed. LFP phenolics strongly inhibited linoleic acid oxidation and exhibited a dose-dependent free-radical scavenging activity against alpha,alpha-diphenyl-beta-picrylhydrazyl (DPPH*) and hydroxyl radicals and superoxide anions. The degradation of deoxyribose by hydroxyl radicals was...