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정태환 ( Tae-hwan Jung ),황효정 ( Hyo-jeong Hwang ),윤숭섭 ( Sung-seob Yun ),이원재 ( Won-jae Lee ),김진욱 ( Jin-wook Kim ),신경옥 ( Kyung-ok Shin ),한경식 ( Kyoung-sik Han ) 한국유가공기술과학회 2016 Journal of Dairy Science and Biotechnology (JMSB) Vol.34 No.3
In many countries, goat milk is an excellent nutrient source and is less allergenic for children and the elderly. The casein composition of goat milk consists largely of β-casein and lower amounts of α<sub>s1</sub>-casein, which may interfere with digestion by forming solid curds in the human stomach. Goat milk contains small fat globules and large amounts of medium chain fatty acids for, better digestibility, as well as abundant minerals and vitamins with high absorption rates. Recently, the medical benefits of goat milk in different human disorders have been recognized, leading to an increased interest in developing functional foods with goat milk, particularly for individuals with malabsorption syndrome. However, the physiological and biochemical properties of goat milk are largely unknown. We review the importance of goat milk as a potential functional food by providing scientific evidence confirming its health benefits.
세가지 다른 모형의 덕트 프로펠러의 CFD 해석과 시험에 관한 연구
정태환(Tae-Hwan Joung),정성재(Seong-Jae Jeong),이승건(Seung-Keon Lee) 한국해양공학회 2014 韓國海洋工學會誌 Vol.28 No.3
In this study, propeller open water characteristics (K<SUB>T</SUB>, K<SUB>T</SUB> and η<SUB>0</SUB>) were compared for three different ducted propellers using a Computational Fluid Dynamics (CFD) analysis, as well as an experimental test at a basin. The best shape of the duct was selected from the three types of specially designed ducts based on the CFD analysis results. The same propeller model (Kaplan type propeller) was used inside all three duct models, and the propeller open water characteristics were compared, predominantly at the design speed for an underwater vehicle. Finally, the results of the CFD test simulations for the selected duct case were verified by experimental open water tests in a towing tank.
버찌, 아로니아, 마키베리의 성분 및 항산화 활성 비교 연구
이기원,제해종,정태환,이유림,최재환,황효정,신경옥,Lee, Ki-Won,Je, Haejong,Jung, Tae-Hwan,Lee, Yu lim,Choi, Jae-Hwan,Hwang, Hyo-Jeong,Shin, Kyung-Ok 한국식품영양학회 2018 韓國食品營養學會誌 Vol.31 No.5
This study was performed to facilitate development of new food materials by comparing general components, functional components and antioxidant activity of cherry, aronia, and maquiberry. Cherry revealed higher content of water (6.71%), crude protein (4.61%) and crude protein (5.33%) than aronia and maquiberry. Crude fat content of cherry fruits was the lowest at 1.46%. Content of iron per 100 g was 0.96 mg in cherry, significantly higher than other berries. Total phenolic content of cherry, aronia and maquiberry was 31.32~95.05 GAE mg/g. Total flavonoid content in water extract was 2.07 QE mg/g in cherry, compared with aronia and maquiberry. FRAP reduction power of cherry, aronia and maquiberry was $86.94{\sim}331.83TEAC\;{\mu}mol/g$. FRAP reduction power ($156.50TEAC\;{\mu}mol/g$) of cherry was higher than that of aronia ($121.72TEAC\;{\mu}mol/g$) at $95^{\circ}C$ deionized water extract. In the case of water extract, $117.00TEAC\;{\mu}mol/g$, and cherry was higher in ABTS radical scavenging ability than aronia ($86.55{\mu}mol/g$). DPPH radical scavenging activity of cherry, aronia and maquiberry was $26.34{\sim}493.53TEAC\;{\mu}mol/g$. DPPH radical scavenging activity was lowest in cherry. In conclusion, in place of foreign expensive aronia and maquiberry, the price of cherry is low and use of cherry widely distributed has increased and is used as a material of functional food.
저온 캡슐화에 의한 Weissella cibaria CMU의 생존율 증진 효과
이다언 ( Da-eon Lee ),황효정 ( Hyo-jeong Hwang ),조유나 ( Yu-na Jo ),정태환 ( Tae-hwan Jung ),한경식 ( Kyoung-sik Han ) 한국유가공기술과학회 2018 Journal of Dairy Science and Biotechnology (JMSB) Vol.36 No.3
In this study, we aimed to investigate the effects of low-temperature encapsulation on the viability of Weissella cibaria CMU under harsh conditions and in freeze-dried foods during storage. The capsules were prepared by gelation of sodium caseinate at different concentrations (5%, 6%, 7%, and 8%) with a combination of 0.5% gellan gum and 2% glucono-δ-lactone. The size distribution of the capsules was determined using a Mastersizer 3000 laser diffraction particle size analyzer. Scanning and transmission electron microscopy revealed that the capsule with 6% sodium caseinate had a smooth and rounded external surface, with reproducibility. The acid, bile, and heat tolerances of the encapsulated cells were significantly higher than those of the control under prolonged acid (5 h), bile (12 and 24 h), and heat (2 h) exposure, respectively. During storage for up to 6 months at 4℃ or 25℃, the viability of encapsulated Weissella cibaria CMU in beef and vegetable rice porridge was effectively improved.
Olive Oil, Flaxseed Oil 및 Perilla Oil을 급여한 Mice의 지질대사에 미치는 목초액의 영향
정근희 ( †keun Hee Chung ),방남휴 ( Nam Hyu Bang ),신경옥 ( Kyung Ok Shin ),정태환 ( Tae Hwan Jung ),황효정 ( Hyo Jeong Hwang ),최경순 ( Kyung Soon Choi ) 한국식품영양학회 2013 韓國食品營養學會誌 Vol.26 No.2
본 연구에서는 현재 시중에서 많이 판매되고 있는 불포화 지방산의 함량이 높은 오일(올리브 오일, 아마씨유 및 들기름)의 mice 내 대사에 미치는 목초액의 영향을 알아보기 위해 실시하였다. 오일과 목초액의 첨가에 따른 각 군의 평균 체중은 27~31 g 사이였으며, 평균 체중에는 유의한 차이가 나타나지 않았다. 콜레스테롤 수치는 목초액을 첨가한 PP군은 96.71±25.75 ㎎/㎗로 나타나, 올리브 오일을 첨가한 COW군(133.56±21.53 ㎎/㎗)에 비해 유의하게 낮게 조사되었다. 오일을 첨가한 여섯 군을 비교해 보면, 콜레스테롤 농도는 CFP군에서 100.30±22.60 ㎎/㎗로 가장 낮게 나타났으며, 그 다음으로 CPP군에서 110.70±11.16 ㎎/㎗, CFW군에서 121.90±23.85 ㎎/㎗ 순으로 조사되었다(p<0.05). 중성지방 농도는 COP군이 121.10±50.79 ㎎/㎗인 반면에 CFP군과 CPP군에서 각각 77.80±38.58㎎/㎗와 92.40±33.04 ㎎/㎗로 유의하게 낮았다(p<0.05). 식이중 올리브 오일의 첨가는 PW군에 비해 콜레스테롤과 LDLcholesterol의 수준 증가시켰다. 그러나 식이 중 아마씨유와 목초액의 동시 첨가는 PW군에 비해 HDL-cholesterol의 수준은 증가시킨 반면에, LDL-cholesterol과 중성지방의 농도는 감소시킨 것으로 조사되었다. 또한 식이 중 들기름의 첨가는 중성지방 농도를 감소시켰으며, HDL-cholesterol의 수준을 증가 시켰다. 결론적으로 식이를 통한 아마씨유나 들기름의 섭취는 지질대사에 영향을 주는 것으로 사료된다. 특히 아마씨유와 목초액을 동시에 첨가한 군에서는 HDL-cholesterol의 수준은 증가시킨 반면에, LDL-cholesterol과 중성지방의 농도는 감소시킨 것으로 조사되었다. 따라서 오일과 목초액의 적당한 양의 장기간 투여는 콜레스테롤, LDL-cholesterol 및 중성지방을 효과적으로 억제할 뿐만 아니라, HDL-cholesterol 수준을 효과적으로 증가시킬 수 있을 것으로 사료된다. 이에 본 연구를 기초로 해서 불포화지방산의 함량이 높은 오일과 목초액의 상관관계에 대한 항산화 연구 등이 지속적으로 수행되어야 할 것으로 사료된다. Our objectives in this experiment were to study the effects of oils that are high in contents of unsaturated fatty acids (olive, flaxseed, and perilla oils) and pyroligneous liquor on plasma lipid concentrations in mice. Male ICR-mouse (n=10 per group) were fed powdered form diets containing oil and pyroligneous liquor for 60 days. The cholesterol level of the PP group (96.71±25.75 ㎎/㎗) was lower than that of the COW group (133.56±21.53 ㎎/㎗). Levels of triglyceride of COP, CFP, and CPP groups were 121.10±50.79 ㎎/㎗, 77.80±38.58 ㎎/㎗, and 92.40±33.04 ㎎/㎗, respectively (p<0.05). The dietary addition of olive oil increased the plasma lsevels of cholesterol and LDL-cholesterol. On the other hand, the dietary addition of flaxseed oil and pyroligneous liquor increased the plasma level of HDL-cholesterol and decreased the plasma levels of LDL-cholesterol and triglyceride compared with those of the control group. Further, the dietary addition of perilla oil decreased plasma triglyceride but increased HDL-cholesterol. The decrease in the cholesterol level was much higher in the CFP group. In conclusion, the dietary addition of long-term pyroligneous liquor effectively decreased the plasma levels of cholesterol and triglyceride and increased the plasma level of HDL-cholesterol. The additional dietary administration of flaxseed and perilla oils increased the effect of pyroligneous liquor.
살균 및 비가열압착한 들깨오일의 영양성분 및 항산화 분석
김양희(Yang-Hee Kim),장지휘(Ji-Hwe Chang),하서영(Seo-Yeong Ha),박수진(Su-Jin Park),박선영(Seon-Young Park),정태환(Tae-Hwan Jung),황효정(Hyo-Jeong Hwang),신경옥(Kyung-Ok Shin) 한국식품과학회 2022 한국식품과학회지 Vol.54 No.3
본 연구에서는 살균 및 비가열압착한 들깨오일(superilla)을 활용하여 영양성분을 확인하고 기능성 식품으로서의 가능성을 알아보기 위해 시판되는 들기름과 비교실험을 수행하였다. 수분 함량과 pH는 CPPO에서 높았고, 구리, 코발트, 칼슘 함량은 SRPO에서 높았다. 총 비타민 E, 토코페롤, 리놀렌산 함량은 LPPO에서 더 높았다. 총 폴리페놀 함량과 ABTS 라디칼 소거활성은 SRPO에서 가장 높은 수치를 보였으며, 아질산염 소거능 측정값은 CPPO에서 가장 높았다. L 및 a 값은 CPPO에서 더 높았고 b값은 LPPO에서 더 높았다. 이상의 결과를 통해 살균 및 비가열압착한 들깨오일(SRPO)의 무기질 함량, 총 폴리페놀 함량, ABTS라디칼 소거활성 및 아질산 소거능이 있음을 확인하였다. 또한 시간이 경과할수록 SRPO는 과산화물가가 낮았고, LPPO는 산가가 유의하게 증가하였다. 따라서 본 연구를 종합해 볼 때, 살균 및 비가열압착한 들기름의 경우 기존의 방식으로 생산된 들기름과 영양소 성분이 유사하였다. 이는 새로운 들기름 제조방법을 제공하는 계기가 되었으며, 이를 통해 들기름의 상품화의 기초가 마련되었다고 판단된다. In this study, the nutritional properties of sterilized and non-heat-pressed raw perilla oil (SRPO) were studied and its potential as a functional food was evaluated. The copper, cobalt, and calcium levels were high in sterilized and SRPO. The total polyphenol content and ABTS radical scavenging activity were the highest in SRPO, whereas nitrite scavenging activity was the highest in 45℃ cold pressed perilla oil (CPPO). The above results confirmed that sterilized and non-heat-pressed perilla oil had high mineral and total polyphenol contents, as well as ABTS radical scavenging activity and nitrite scavenging ability. The peroxide value of SRPO decreased as the storage period increased, and the acid value of low-temperature pressed perilla oil over 65℃ (LPPO) significantly increased. This work also provided an opportunity to develop a new method for manufacturing perilla oil, and it is hoped that these experiments will form a basis for the commercialization of perilla oil.