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Effects of Air, Microwave, and Microvacuum Drying on Brown Rice Quality
박인명,Jong-Dae Park,Hyun-Yu Lee,Jun-Seok Kum 한국응용생명화학회 2012 Applied Biological Chemistry (Appl Biol Chem) Vol.55 No.4
Proper hulling and drying are critical components of brown rice quality. Two medium grain rice varieties were examined for grain qualities including husking, cracking, germination ratio,color, hardness, and fat acidity after drying with 15, 30, and 45oC air, as well as at 100 and 200 W microwave, and microwavevacuum,respectively. Unlike impeller dehuller, rubber roller dehuller could not process rice with 22% moisture content. Brown rice varieties with 22% moisture content after dehulling were dried at 15, 30, and 45oC until moisture content reached 15%; the drying ratios for each temperature were 1.02, 2.55, and 3.46 %/h,respectively. When brown rice varieties were dried at below 30oC,no significant changes were observed in physico-chemical properties,whereas the cracking ratio increased significantly. Microwavevacuum drying resulted in higher reductions of germination ratio and fat acidity than with the microwave only at 100 W as well as reduced drying time over microwave drying.
뼈째 포함한 전어 무섞박지 김치의 발효 중 이화학적 품질 특성 연구
박인명,송호수,조성순 한국식품과학회 2018 한국식품과학회지 Vol.50 No.6
We examined the physicochemical characteristics of radish kimchi supplemented with either 10% boneless or boned sliced gizzard shad (BLGS and BGS, respectively) and compared them to those of untreated kimchi during an eightweek fermentation period. BLGS- and BGS-containing kimchi showed higher acidity, amino nitrogen, and Lactobacillus levels than control kimchi. Furthermore, BGS-containing kimchi showed higher acidity, amino nitrogen, and Lactobacillus levels, and lower reducing sugar contents than BLGS at the optimum- and over-ripened stage. Higher amino nitrogen serves as a good medium for microorganism growth, which produce organic acids, consequently decreasing the reducing sugar, pH levels and increasing the acidity. The preference test showed that the control kimchi was the most preferred at the unripened stage, while the BLGS- and BGS-supplemented kimchi samples in the ripened and over-ripened stages showed similar preferences. In conclusion, our results indicate that gizzard shad-supplemented kimchi shows positive health characteristics, such as low salinity, high amino nitrogen and Lactobacillus levels.
미세 채널에서 R123/R134a/R22 혼합 냉매의 유동 비등 열전달에 대한 실험적 연구
박인명(Inmyong Park),인세환(Sehwan In),정상권(Sangkwon Jeong) 대한설비공학회 2011 대한설비공학회 학술발표대회논문집 Vol.2011 No.7
This paper describes the flow boiling heat transfer of R123/R134a/R22 mixture in a single round micro-channel with 0.19 ㎜ ID. The flow boiling heat transfer coefficients were measured for ternary mixture (R123/R134a/R22 mole fraction: 0.19/0.62/0.19) at various experimental conditions: mass velocities (314, 392, 470 ㎏/㎡-s), heat fluxes (10, 15, 20 ㎾/㎡) and vapor qualities (0.2 - 0.8). The heat transfer characteristics of the R123/R134a /R22 mixture are similar to those of the R123/R134a mixture (mole fraction: 0.5/0.5) observed in the previous flow boiling experiment which indicates that the major heat transfer mechanism in the micro-channel is dominated by evaporation of thin liquid film around the elongated bubbles. The large reduction of heat transfer coefficients compared with pure refrigerant is observed in micro-channel flow boiling by mass transfer effect of mixed refrigerant.
액체 질소 이하 온도에서 작동하는 능동형 자기 재생식 냉각기의 개발
박인명(Inmyong Park),유정현(Junghyun Yoo),정상권(Sangkwon Jeong) 대한설비공학회 2017 대한설비공학회 학술발표대회논문집 Vol.2017 No.6
능동형 자기 재생식 냉동기는 대상을 냉각시키는 데 자성 물질의 자기열량효과를 이용한다. 이 효과는 가역과정이기 때문에 효율적인 측면에서 큰 잠재력을 지니고 있다. 또한 저온에서 기계적인 움직임이 없기 때문에 내구성이 우수한 시스템을 구현할 수 있다. 본 연구에서는 액체질소 온도 이하에서 작동하는 능동형 자기 재생식 냉동기를 구성하였고 성능을 시험하였다. 실험장치는 크게 능동형 자기 재생기, 자기장을 인가하는 고온초전도자석, 작동유체의 질량유량을 발생시키는 왕복유동장치로 구성되어 있다. 재생기의 고온부를 77 K으로 유지시켰을 때 저온부의 온도가 자기열량효과에 의하여 서서히 감소하면서 냉각 되는 것을 확인하였고 최대 45 K의 온도차이를 발생시켰다.
건강한 한국인에서 김치의 섭취가 대사증후군의 위험에 미치는 상관관계
오인명 ( In Myung Oh ),정효지 ( Hyo Jee Joung ),오상우 ( Sang Woo Oh ),윤영숙 ( Yeong Sook Yoon ),유경화 ( Kyoung Hwa Yoo ),박지은 ( Ji Eun Park ),박주상 ( Ju Sang Park ),장은정 ( Eun Jeong Jang ),박상종 ( Sang Jong Park ),박상운 한국정맥경장영양학회 2013 한국정맥경장영양학회지 Vol.5 No.3
Hospital, Goyang, Korea Purpose: Metabolic Syndrome (MetS) is defined as the coexistence of several metabolic risk factors. Diet is thought to play a major role in development of MetS. We attempted to determine whether the Korean diet is related to a reduced risk for development of MetS. Methods: A total of 425 healthy Korean adults were recruited by advertisement to Bundang Jesaeng Hospital from January 1 to June 30, 2009; those not taking regular medications and without diagnosis of disease were included. Data were collected on three-day dietary intake, anthropometric measurements, and diagnostic parameters, including levels of lipid panel, glucose, adiponectin, and inflammatory cytokines (interleukin-6 [IL-6], tumor necrosis factor-α [TNF-α]) for MetS from individuals enrolled in the study. The National Cholesterol Education Program (NCEP) scoring system was used for diagnosis of MetS. Results: Out of 425 (11.8%) subjects, 50 were diagnosed as having MetS. As NCEP scores increased, the levels of inflammatory cytokines (IL-6, TNF-α) showed an increasing tendency, however, the adiponectin level had decreased (P<0.0001). A greater amount of total vegetable consumption appeared to be associated with decreased risk for MetS. A higher carbohydrate consumption represented by the amount of rice intake (refined starch) appeared to be associated with higher risk of MetS. However, increasing consumption of rice combined with Kimchi showed an association with increased high-density lipoprotein cholesterol (56.7±1.6 vs. 62.8±2.2, P for trend: 0.0321) and decreased adiponectin level (9.0±0.8 vs. 11.4±1.2, P for tend: 0.0255). Conclusion: Among healthy Korean volunteers consuming an ordinary Korean diet, the prevalence of MetS was found to be 11.8%. Greater consumption of rice showed an association with greater risk of MetS, while greater consumption of rice combined with Kimchi, the main staple of the Korean diet, showed an association with lower risk of MetS. (J Korean Soc Parenter Enter Nutr 2013; 5(3):110-116)
정일민,박인명,김승현 한국응용생명화학회 2011 Applied Biological Chemistry (Appl Biol Chem) Vol.54 No.5
Simazine is widely used to manage weed growth in the agricultural and industrial fields. Three analytical methods, including gas chromatography (GC)/ion-trap (IT), GC/mass selective detector (MSD), and high-performance liquid chromatography (HPLC)/triple quadrupole mass spectrometers (HPLC/MS/MS), were developed and compared for simazine quantification. The spike recoveries by GC/IT, GC/MSD, and HPLC/MS/MS were 100, 117, and 82.5%, respectively. Different spike recovery depending on analytical methods could be due to matrix effect, different instrumental sensitivity, losses during sample preparation or all of the above. The limit of detection was 0.0361, 0.0263, and 0.0013 mg/kg by GC/IT, GC/MSD, and HPLC/MS/MS, respectively. The HPLC/MS/MS with a positive atmospheric pressure chemical ionization (APCI) ionization mode was the most rapid (7 min), sensitive (limit of detection: 0.0013 mg/kg, limit of quantification:0.0042 mg/kg), and precise (relative standard deviation: 0.5%) method for simazine quantification.
박천석,박인명 한국식품과학회 2017 Food Science and Biotechnology Vol.26 No.2
The glucotransferase amylosucrase (AS) influences the structural properties of starch, but its precise effects are unclear. The structural characteristics and in vitro digestibility of waxy corn starch modified by AS from Neisseria polysaccharea were examined. AS-treated starch exhibited a higher slowly digestible starch (SDS) fraction, the weak B-type polymorph, lower relative crystallinity, and lower double helix content than those of native starches based on X-ray diffractometry, solid-state 13C CP/MAS NMR, and FT-IR. AS-treated starches exhibited increased proportions of degree of polymerization (DP) 25–36 and DP≥37 chains. Higher SDS and resistant (RS) fractions, higher proportions of DP 25–36 and DP≥37 chains, more double helices, higher relative crystallinity, and less difference between double helix and relative crystallinity were observed for starch treated with 460 U than with 230 U of AS. AS re-built the double-helical and rearranged crystalline structure of gelatinized starch and consequently influenced the SDS and RS fractions.
유경화,오인명,박지은,김미정,박주상,박상종,장은정,박상운,김상중,윤영숙,정효지,백현욱 대한비만학회 2012 The Korean journal of obesity Vol.21 No.3
배경: 저아디포넥틴혈증이 대사증후군의 발생과 유의한 연과성이 있다는 연구 결과들이 있는데 한국인에서 건강한 성인을 대상으로 한 연구는 부족하다. 본 연구는 건강한 성인에서아디포넥틴과 대사증후군 및 그 구성요소와 어떤 연관성을 가지는지 알아보기 위하여 시행되었다. 방법: 분당 지역에 거주하는 30~59세의 과거 병력이 전혀없는 건강한 남성 256명, 여성 340명을 대상으로 하였다. 아디포넥틴과 대사증후군 및 구성요소의 연관성을 알아보기 위하여 로지스틱 회귀분석을 시행하였다. 결과: 연구대상자의 평균 연령은 남성 43.4 ± 8.1, 여성44.3 ± 8.1이었으며, 대사증후군으로 진단된 남성과 여성 모두에서 아디포넥틴 농도가 유의하게 낮았고 인슐린 저항성은 유의하게 높았다. 남성과 여성 모두에서 대사증후군의 구성요소를 많이 가질수록 아디포넥틴 농도는 비례하여 감소하였고,log HOMA-IR score는 비례하여 증가하였다. 아디포넥틴 농도가 가장 높은 삼분위수 집단을 기준으로 하였을 때 아디포넥틴 농도가 가장 낮은 삼분위수 집단에서 대사증후군의 교차비는 남성 3.56 (95% CI 1.83~6.91), 여성 6.38 (95% CI 2.35~17.3)로 유의하게 높았으며 아디포넥틴 농도가 증가함에따라서 대사증후군의 교차비가 감소하는 용량반응관계를 보여주었다 (P for trend < 0.05) 이러한 연관성은 남성의 경우 나이, 체질량지수(BMI), log HOMA-IR score을 보정한 후에도여전히 유의하였으나, 여성에서는 유의성이 사라졌다. 결론: 건강한 한국인에서 아디포넥틴 농도와 대사증후군 및구성요소는 유의한 연관성이 있었다. 남성에서는 저아디포넥틴혈증과 대사증후군의 연관성이 인슐린 저항성과 독립적으로나타났으나 여성에서는 그렇지 못하였다.