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Antioxidant activities of fresh grape juices prepared using various household processing methods
김민주,전정규,박신영,최미주,박은주,김정인,김묘정 한국식품과학회 2017 Food Science and Biotechnology Vol.26 No.4
The purpose of this study was to evaluate and compare the antioxidant activities, and their contents, in grape juices prepared by various household juicers, and grape flesh (GF). The grape juices were prepared using a low-speed masticating (LSM) juicer, a high-speed centrifugal (HSC) juicer, and a blender (BLD). The total polyphenol, total flavonoid, total monomeric anthocyanin, and vitamin C contents were highest in the LSM grape juice, and decreased in the order: LSM[BLD[HSC[ GF. The antioxidant activities such as DPPH radical scavenging activity, and SOD-like activity were significantly higher in the LSM juice than in other juices and grape flesh. The antioxidant activities and the quality of grape juices were significantly affected by the household juicing method used, and an LSM juicer is strongly recommended for making healthy grape juice, rich in antioxidants.
김민주,김정인,강민정,권보경,전정규,최지혜,김묘정 한국식품과학회 2015 Food Science and Biotechnology Vol.24 No.1
The aim of this study was to evaluate and compare the physicochemical, nutritional, and sensory properties of homemade fresh tomato juices prepared using 2 types of household juicers, a high-speed centrifugal juicer (HSC juicer) and a low-speed masticating juicer (LSM juicer). Juice yield, soluble solids, and the contents of total polyphenol, vitamin C, and lycopene in LSM tomato juice were significantly higher than those in HSC tomato juice. The DPPH radical scavenging activity of LSM tomato juice was also higher than that of HSC tomato juice. HSC tomato juice easily separated into 2 layers with many fine bubbles, while LSM tomato juice was homogeneous. Sensory evaluation revealed that panels significantly preferred LSM tomato juice to HSC tomato juice. In conclusion, the LSM juicer shows several advantages over the HSC juicer for preparing tomato juice of superior quality and taste that is rich in antioxidant phytochemicals at a high yield.
[디젤엔진부문] 플라즈마를 이용한 승용 디젤자동차에서의 입자상물질 제거
채재우(Jaeou Chae),황재원(Jaewon Hwang),손창업(Changeob Son),정지용(Jiyong Jeong),한정희(Junghee Han),김웅혁(Xiaonghe Jin),황화자(Hwagja Hwang),전정규(Jeongkyu Jeon) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Diesel engine exhaust gas is known to be one cause photochemical smog, which is so damaging to environments, However, because of its high thermal efficiency and economic advantages, the engine is not easily disappear. The purpose of this study was to develop a method for removing the particulate matter(PM) contained in diesel engine exhaust gas using the corona discharge processes. The exhaust gas characteristics and energy density were investigated on the dynamometer test bed and chassis dynamometer with CVS-75 mode with passenger diesel car. It was reported the smoke removal efficiency has around 70% in the dynamometer test with 80W energy consumption and PM removal efficiency has 68% in the real car test. Considering this results, plasma technology is one of the way to simultaneously removing method the diesel particulate matter(DPM).and NOx