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박수범 ( Su Beom Park ),한복경 ( Bok Kyeong Han ),오유진 ( Yu Jin Oh ),이상준 ( Sang Jun Lee ),차성관 ( Seong Kwan Cha ),박영서 ( Young Seo Park ),최혁준 ( Hyeok Jun Choi ) 한국산업식품공학회 2012 산업 식품공학 Vol.16 No.1
In order to improve the sensory preference and to mitigate the bitter taste of green tea extract products, 100 microorganisms isolated from Korean traditional fermented foods were used to ferment green tea extract and the analysis of catechins and sensory evaluation of the fermented green tea extract products were undertaken. When the isolates were cultured into 2, 4, 6, 8, and 10% green tea extract, the highest growth rates were observed when 2 and 4% of green tea extract were used as growth medium. When the contents of catechin components of non-fermented and fermented green tea extracts were analyzed by HPLC, there was a significant decrease in content of epigallocatechin gallate (EGCG), epigallocatechin (EGC), epicatechin (EC) (EGCG: 125.45→65.42 μg/mg, EGC: 85.96→38.03 μg/ mg, EC: 25.64→13.84 μg/mg), whereas there was a significant increase in content of gallocatechin gallate (GCG) and gallocatechin (GC) (GCG: 7.79→85.22 μg/mg, GC: 9.46→64.59 μg/mg). Eleven strains of lactic acid bacteria, which showed relatively small content of gallate-type catechins (EGCG, ECG, GCG, CG) in their fermented green tea extracts, were selected and used for sensory test. As a result of sensory evaluation, Lactobacillus plantarum 62901 and Leuconostoc pseudomesenterioides K200132 showed the best score in overall preference. Their fermented products also showed strong roasted flavor while decreased grass flavor and bitter taste were observed.
스핀들 구동용 분포권 타입과 집중권 타입 매입형 영구자석 동기 전동기 특성비교
박수범(Su-Beom Park),권순오(Soon-O Kwon),김성일(Sung-Il Kim),홍정표(Jung-Pyo Hong) 한국생산제조학회 2006 한국생산제조시스템학회 학술발표대회 논문집 Vol.2006 No.5
Performance comparison of IPMSMs with distributed and concentrated winding is presented in this paper. Two IPMSMs have been designed and fabricated with identical rotor dimension, air-gap length, series turn number, stator outer radius, and axial length except winding configuration. Basic parameters and machine performance, such as resistances, back emf, output torque, and efficiency, are compared. From the comparison results, motor design considering winding configuration is discussed.
전기자 권선 방법에 따른 매입형 영구자석 동기 전동기의 특성 비교
박수범(Su-Beom Park),권순오(Soon-O Kwon),김성일(Sung-Il Kim),홍정표(Jung-Pyo Hong) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
Performance comparison of IPMSMs with distributed and concentrated winding is presented in this paper. Two IPMSMs have been designed and fabricated with identical rotor dimension, air-gap length, series tum number, stator outer radius, and axial length except winding configuration. Basic parameters and machine performance, such as resistances, back emf, output torque, and efficiency, are compared. From the comparison results, motor design considering winding configuration is discussed.
스핀들 구동용 분포권 타입과 집중권 타입 매입형 영구자석 동기 전동기 특성비교
박수범(Su-Beom Park),권순오(Soon-O Kwon),김성일(Sung-Il Kim),홍정표(Jung-Pyo Hong) 한국생산제조학회 2006 한국공작기계학회 춘계학술대회논문집 Vol.2006 No.-
Performance comparison of IPMSMs with distributed and concentrated winding is presented in this paper. Two IPMSMs have been designed and fabricated with identical rotor dimension, air-gap length, series turn number, stator outer radius, and axial length except winding configuration. Basic parameters and machine performance, such as resistances, back emf, output torque, and efficiency, are compared. From the comparison results, motor design considering winding configuration is discussed.
박수범(Park, Su Beom),이성주(Lee, Seong Ju),김은옥(Kim, Eun Ok) 대한화학회 2002 대한화학회지 Vol.46 No.3
폴리아닐린에 전자주게기(-CH3)를 치환하여 전자효과(electronic effect) 와 입체장애효과(steric effect)를 확인하기 위하여 폴리아닐린 유도체인 폴리톨루이딘(POT)1을 화학적 및 전기화학적으로 합성한 결과 입체장애효과가 더 우세하였다. 순환전압 전류법(Cyclic Voltammetry)과 전위차벗김 분석법(Constant Current Potentiometric Stripping Analysis)을 사용한 결과 POT의 IP는 4.95eV, EA는 3,24eV, Eg는 1.71eV임을 확인하였다. Poly-o-toluidine (POT) was chemical ly and electrochemically synthesized for the study of the electronic and steric effect of methyl substituents. It was found that the steric effect was dominant in POT. The IP 4.95 eV, EA 3.24 eV, Eg 1.71 eV of POT were found by the CV (Cyclic Voltammetry) and CCPSA (Constant Current Potentiometric Stripping Analysis).
박수범(Park, Su Beom),이성주(Lee, Seong Ju),김용록(Kim, Yong Rok),김은옥(Kim, Eun Ok) 대한화학회 2002 대한화학회지 Vol.46 No.3
폴리아닐린에 전자주게기(-CH3)를 치환하여 전자효과(electronic effect) 와 입체장애효과(steric effect)를 확인하였다.1 폴리아닐린 유도체 폴리톨루이딘(POT)의 산화상태를 변화시키면서 ITO/POT/Al 구조의 유기발광소자를 제작하여 PL, I- V 특성 및 전기발광 특성을 확인하였다. 발광소자의 구동전압은 9∼14 V 이었다. Poly-o-toluidine (POT) was chemical ly and electrochemically synthesized for the study of electronic and steric effect of methyl substituents. The turn-on voltage of organic light emitting diode (OLED) was 9~14 V. ITO/POT/Al structured OLED were fabricated with various oxidation states of POT. PL, I-V characteristics and EL spectra were investigated.