in this paper, grafting of acrylic acid monomer on gum tragacanth was performed. variable of experiment included concentration of initiators and monomer, time, and temperature. grafting efficiency was measured in the term of percentage of grafting (%g) and percentage of grafting efficiency (%e). effectiveness of grafted gum in ferrous ion removal at different condition was assessed. according t...

Effect of inorganic phosphate on ferrous ionand ascorbate-induced lipid. peroxidations of isolated rat liver mitochondria was investigated. As a result it has been shown that phosphate accelerates the ferrous ion.induced lipid peroxidation; namely, phos. phate shortens the induction lag period of the lipid peroxidation reaction but the malondialdehyde after onset of its production is yielded at...

Phyllanthus emblica L. is traditionally used as both medicine and food in Taiwan. In this study, we evaluated the antioxidant, anti-inflammatory, neuroprotection bioactivities of P. fruit. fruit extracts had a high content total phenol flavonoids, chlorogenic acids. For antioxidant capacity, 95% ethanol-extracted best DPPH radical scavenging activity, ferrous ion chelating ability, reducing pow...

Extracts of human articular cartilage contain proteases capable of degrading the proteoglycan component of cartilage matrix at neutral and acid pH. These enzymes have been partially purified by ion exchange chromotography and characterized by disc electrophoresis, inhibition patterns, and action of proteoglycan. Three distinct metalloproteases are described. A neutral protease that digests prot...

In a hydrothermal preparation of crystalline magnetite (Fe3O4) nanoparticles, the influence of the experimental parameters (initial molar ratio of ferrous/ferric ions, initial concentration of ferrous ions, and heating time), and their interactions, on the particle formation was studied using response surface methodology (RSM), based on a statistical design of experiments (DOE). As indices indi...

The present study aims to investigate the phytochemical profiles, in vitro antioxidant and antiproliferative properties of methanol 70% ethanol extracts Camellia mistletoe. Both were analyzed for contents total flavonoid, carotenoid L-ascorbic acid, such as scavenging capacities (1,1-diphenyl-2-picrylhydrazyl, O2- NO), ferrous ion chelating reducing power. MTT assay was used assess against huma...

Three species of medicinal mushrooms are commercially available in Taiwan, namely, Ganoderma lucidum (Ling-chih), Ganoderma tsugae (Sung-shan-ling-chih), and Coriolus versicolor (Yun-chih). Methanolic extracts were prepared from these medicinal mushrooms and their antioxidant properties studied. At 0.6 mg/mL, G. lucidum, G. lucidum antler, and G. tsugae showed an excellent antioxidant activity ...

Cellular damage caused by reactive oxygen species has been implicated in several diseases, thus establishing a significant role for antioxidants in maintaining human health. Acetone, methanol, and hot water extracts of Pleurotus citrinopileatus were evaluated for their antioxidant activities against β-carotene-linoleic acid and 1,1-diphenyl-2-picrylhydrazyl (DPPH) radicals, reducing power, ferr...

the term biomining have been coined to refer to the use of microorganisms in mining processes as in the biooxidation of refractory gold minerals. the biooxidation of refractory gold ores presents similar characteristics when compared with roasting and pressure oxidation. almost without exception, microbial extraction procedures are more environmentally friendly. the isolated bacteria in this st...