Sung-Hyeon Lee

Effects of Acorn (Quercus acutissima CARR.) Supplementation on the Level of Acetylcholine and Its Related Enzyme Activities in the Brain of Dementia Mouse Model

This study was designed to investigate the anti-dementia effects of acorn (Quercus acutissima CARR.) in brain of the mouse. Dementia model was induced by administration of scopolamin (30 mg/kg BW) Male ICR mouse were fed basal diet (control group), and experimental diets (AP-5 and AP-10 groups) added of dried acorn powder to basal diet for 8 months. Acetylcholine content significantly increase in AP-5 and AP-10 groups (, respectively) compared with control group. Acetylcholinesterase activities were significantly inhibited (, respectively) in brain of AP-5 and AP-10 groups. Monoamine oxidase-B (MAO-B) activities were significantly inhibited (, respectively) in brain of AP-S and AP-10 groups. These results suggest that acorn (Q. acutissima CARR.) may play an effective role in an attenuating various age-related changes such as dementia including learning and memory impairments in brain.

Variation of γ-Oryzanol by Incorporation of Green Manure Crops in Korean Rice Cultivars

The γ-oryzanol, ferulic acid esters, which are well-known for their function on cholesterol lowering and prevention of inflammation, diabetes and cancer, are found in the seeds of cereal crops such as rice, corn, wheat and rye. Among them, rice has been reported to contain the highest ferulic acid esters. Since rice cultivation with green manure as a N source is an environmental friendly agricultural practice, it is necessary to identify and quantify as well as evaluate the variations in these compounds in rice samples as affected by different green manure conditions. A total of ten components of γ-oryzanol were isolated and cycloartenyl ferulate, 24-methylenecycloartanyl ferulate, campesteryl ferulate and sitosteryl ferulate were identified as the major components in Korean rice cultivars, ‘Unkwang’ and ‘Hopum’. Comparing the γ-oryzanol contents of these varieties, ‘Unkwang’ showed clearly similar pattern with conventional type. With the PLS-DA (partial least squares of discriminant analysis) using SIMCA 11.0 ver., the specific pattern and cluster of γ-oryzanol scores with green manure conditions were confirmed, and thus distinguishing green manure effects were possible.

Treatment Effect of Green Manure Crops on Content of γ -Oryzanols from Korean Rice Variety, Unkwangbyeo

Treatment Effect of Green Manure Crops on Content of γ-Oryzanols from Korean Rice Variety, Unkwangbyeo Heon-Woong Kim, Jae-Hyeong Shin, Min-Ki Lee, Sung-Hyeon Lee, Hwan-Hee, Jang, Hyun-Suk Cho, Jeong-Tae Lee, Weon-Tai Jeon and Jung-Bong Kim (Department of Agro-food Resources, National Academy of Agricultural Science, Wanyu-ju, 565-851, Korea, Crop Production and Physiology Research Division, National Institute of Crop Science, Wanyu-ju, 560-500, Korea, Planning & Coordination Division, National Institute of Crop Science, Wanyu-ju, 560-500, Korea.)