For the first time, response surface methodology (RSM) using a Box-Behnken Design (BBD) was employed to optimize the conditions for ultrasonic assisted extraction (UAE) of antioxidants from Chinese sumac (Rhus typhina L.) fruits. Initially, influencing factors such as liquid-solid ratio, duration of ultrasonic assisted extraction, pH range, extraction temperature and ethanol concentration were ...

The antioxidant activity and total phenolic content of some spices (M. piperita L., R. coriaria L., T. spicata, S. officinalis, R. officinalis L., C. ovata L., O. vulgare L., L. nobilis L. and C. annum L.) were determined. The higher TEAC values (mmol TE/g extract) were obtained for sage (1.783) and rosemary (1.241). The IC value (mg/ml) ranged between 0.103-4.082 for mint and capers, respectiv...

Poison oak, ivy, and sumac dermatitis is a T-cell-mediated reaction against urushiol, the oil found in the leaf of the plants. This hapten is extremely lipophilic and concentrates in cell membranes. A blastogenesis assay employing peripheral blood lymphocytes obtained from humans sensitized to urushiol is described. The reactivity appears 1--3 wk after exposure and persists from 6 wk to 2 mon. ...

From the Department Poison-ivy and poison-oak dermatitis are entities well-known to of Dermatology, Un iall primary care physicians, dermatologists, and most of the genrqersity of California, era1 populace in this country. Much has been written about this San Francisco, problem-probably the commonest of all allergic diseases in the School of Medicine. United States. It is a significant occupati...