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권오준,유병혁,최응규,손동화,Kwon, O-Jun,Yoo, Byung-Hyuk,Choi, Ung-Kyu,Son, Dong-Hwa 한국식품과학회 2003 한국식품과학회지 Vol.35 No.2
본 연구는 원적외선 저장쌀의 급여가 흰쥐의 생존능력에 미치는 영향을 조사하기 위하여 수행되었다. 원적외선 저장쌀은 수침시간에 따른 수분흡수량이 일반쌀에 비해 1.3배정도 많았으며, 취반후와 저장에 따른 백색도가 높게 유지되었다. 원적외선 쌀의 급여는 흰쥐의 체중변화에는 유의한 영향을 미치지 못하였다. 흰쥐의 생존능력에 미치는 영향을 조사한 결과 6주령의 경우는 일반쌀과 원적외선 저장쌀간의 생존율에 따른 유의적인 차이는 확인하지 못하였으나, 7주령과 8주령의 경우, 원적외선 저장 쌀의 급여에 따른 생존능력의 유의적인 차이를 나타낸 것으로 확인되었다. Effect of feeding far infrared-irradiated rice on survival ability of mice against drowning was investigated. Moisture absorption of far infrared-irradiated rice was about 1.3-fold higher than that of normal rice. L-Value was maintained high during cooking and storage. Weight of mice was not influenced by far infrared-irradiated rice content. No significant difference in survival abilities of mice between normal rice and far infrared-irradiated rice was shown until 1 breeding week. Significant differences in survival ability between two groups were found in 2 (9.5%) and 3 breeding weeks (7.2%).
NF-κB 저해를 통한 브로콜리 잎 추출물의 PGE<sub>2</sub> 저해효과
박숙자 ( Sook Jahr Park ),안이슬 ( Iseul An ),노규표 ( Gyu Pyo Noh ),유병혁 ( Byung Hyuk Yoo ),이종록 ( Jong Rok Lee ) 대한본초학회 2019 大韓本草學會誌 Vol.34 No.6
Objective : Broccoli is edible green plant that has a wide variety of health benefits including cancer prevention and cholesterol reduction. However, leaves of broccoli are not eaten and are mostly left as waste. This study was conducted to evaluate the effects of the broccoli leaf extract (BLE) on prostaglandin E<sub>2</sub> (PGE<sub>2</sub>) production related to nuclear factor kappa B (NF-κB) signaling in lipopolysaccharide (LPS)-activated macrophages. Methods : BLE was prepared by extracting dried leaf with ethanol. Cell viability was determined by 3-(4,5- Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. PGE<sub>2</sub> and inflammatory cytokines were detected by enzyme-linked immunosorbent assay (ELISA). Expression level of each protein was monitored by Western blot analysis. Results : In LPS-activated Raw264.7 cells, PGE<sub>2</sub> release into culture medium was dramatically enhanced compared to control cells. However, increased PGE<sub>2</sub> was attenuated dose-dependently by treatment with BLE. Inhibition of PGE<sub>2</sub> production by BLE was due to the suppression of cyclooxygenase-2 (COX-2) expression determined by Western blot analysis. BLE also inhibited the production of inflammatory cytokines such as interleukin-6 (IL-6) and tumor necrosis factor-alpha (TNF-α). Inhibition at PGE<sub>2</sub> and cytokine was mediated from inhibition of nuclear translocation of NF-κB due to the repression of inhibitory kappa B alpha (IκBα) phosphorylation and degradation. Conclusion : This study showed that BLE exerted inhibitory activities against PGE<sub>2</sub>, which is critical for the initiation and resolution of inflammatory responses, and that inhibition of PGE<sub>2</sub> was mediated by suppression of NF-κB signaling. These results suggest that the waste broccoli leaves could be used for controlling inflammation.
오배자 추출물의 Acetylcholinesterase 저해 및 항산화 활성 평가
배종섭 ( Jong Sup Bae ),이현식 ( Hyun Shik Lee ),이하영 ( Ha Yeong Lee ),유병혁 ( Byung Hyuk Yoo ),김태완 ( Tae Wan Kim ),김용한 ( Yong Han Kim ),김태훈 ( Tae Hoon Kim ) 한국식품저장유통학회(구 한국농산물저장유통학회) 2012 한국식품저장유통학회지 Vol.19 No.5
Antioxidant capacity and acetylcholinesterase (AChE) inhibitory activity of the aqueous methanolic extract of Rhus javanica were investigated in vitro. The antioxidant properties was measured by radical scavenging assays using DPPH and ABTS+ radicals. The AChE inhibitory efficacy of R. javanica was tested by Ellman`s assay and the total phenolic content was determined using a spectrophotometric method. All tested samples showed a dose-dependent AChE inhibitory and radical scavenging activities. In particularly, ethyl acetate (EtOAc)-soluble portion from the methanolic extract of R. javanica showed significantly higher inhibitory activity than other organic solvent soluble-portions in an AChE and radical scavenging assay systems. These results suggest that R. javanica may be possess potential benefits which might be useful in development of antioxidant and anti-alzheimer`s disease ingredient.