background: autoxidation is considered to be the main route of edible oil deterioration, which produces undesirable odors and flavors (attributed to primary and secondary products of unsaturated fatty acids) during storage and heating. objective: antioxidant activities of zataria multiflora (zmeo) and bunium persicum (bpeo) essential oils (eos) in linseed oil (containing higher ω-3 in vegetable...

The leaves, barks, flowers, fruits and seeds of Calophyllum inophyllum are widely used in traditional practices. Here in the present study, we aimed to evaluate in vitro antioxidant potential of leaf aqueous and methanolic extracts of C. inophyllum in relation to total phenol and flavonoid contents. DPPH (1,1-diphenyl-2-picrylhydrazyl) free radical scavenging and ferric (Fe) reducing power was ...

evening primrose (oenothera biennis) is a biennial flowering plant increasingly cultivated for medicinal use of γ-linolenic acid rich oil of its seeds. in this study, total phenolic and flavonoids content, antioxidant and antimicrobial activity of aceton, ethanolic and metanolic extracts of evening primrose flowers were evaluated. aceton extract had the highest extraction yield, total phenol an...

The present study evaluated the antioxidant potential of Vernonia condensata Baker (Asteraceae). Dried and powdered leaves were exhaustively extracted with ethanol by static maceration followed by partition to obtain the hexane, dichloromethane, ethyl acetate, and butanol fractions. Total phenols and flavonoids contents were determined through spectrophotometry and flavonoids were identified by...

Marine algae are easily produced and are good sources of Fe. If this Fe is bioavailable, algae consumption could help to combat Fe deficiency and anaemia worldwide. The objective of the present study was to evaluate Fe bioavailability, polyphenol content and antioxidant capacity from three species of marine algae distributed worldwide. A total of eighty-three subjects received maize- or wheat-b...

In order to assess the importance of nitrate-dependent Fe(II) oxidation and its impact on the growth physiology of dominant Fe oxidizers, we counted these bacteria in freshwater lake sediments and studied their growth physiology. Most probable number counts of nitrate-reducing Fe(II)-oxidizing bacteria in the sediment of Lake Constance, a freshwater lake in Southern Germany, yielded about 10(5)...

Nitrate-reducing Fe(II)-oxidizing microorganisms were described for the first time ca. 20 years ago. Most pure cultures of nitrate-reducing Fe(II) oxidizers can oxidize Fe(II) only under mixotrophic conditions, i.e., when an organic cosubstrate is provided. A small number of nitrate-reducing Fe(II)-oxidizing cultures have been proposed to grow autotrophically, but unambiguous evidence for autot...

The capacity for Fe(sup3+) to serve as an electron acceptor in the microbial degradation of monochlorinated and nonchlorinated aromatic compounds was investigated in anoxic sediment enrichments. The substrates tested included phenol, benzoate, aniline, their respective monochlorinated isomers, o-, m-, and p-cresol, and all six dimethylphenol isomers. Phenol and 2-, 3-, and 4-chlorophenol were u...

OBJECTIVES Emodin is a bioactive anthraquinone that has diverse biological effects. It is also known as a biosynthetic precursor of hypericin. The purpose of this study was to assess mechanisms of potential genotoxic and antioxidant effects of emodin. We also investigated the potential genotoxic effect of photoactivated emodin. METHODS Potential genotoxicity was determined by the alkaline com...