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레토르트식품, 분유, 비스킷 및 피자 내에 함유되어 있는 트랜스지방산 함량 분석
박다정,박정민,신진호,송재철,김진만,Park, Da-Jung,Park, Jung-Min,Shin, Jin-Ho,Song, Jae-Cheol,Kim, Jin-Man 한국축산식품학회 2008 한국축산식품학회지 Vol.28 No.2
The consumption of foods containing trans fatty acids (TFAs) is a matter of concern at present. According to many studies, trans fatty acids (TFAs) may cause illnesses such as the coronary heart disease, diabetes mellitus, large intestine cancer, and breast cancer. They can also raise low density lipoprotein (LDL) cholesterol and reduce high density lipoprotein (HDL) cholesterol. TFAs can also inhibit the synthesis of phospholipids containing polyunsaturated fatty acids in arterial cells. As a consequence the Food and Drug Administration has deemed that saturated fatty acid, cholesterol and trans fatty acid levels be listed on food labels as of 2006. The Korea Food and Drug Administration also has required the listing of trans fatty acid content on food labels since 2007. The aim of this study was to determine the total lipid and trans fatty acid (TFA) contents in retort food, powdered milk, biscuit and pizza products. The number of samples examined were 2 retort food, 6 powdered milk, 7 biscuit and 3 pizza products. The extraction of total lipids in retort food and powdered milk followed the chloroform methanol method. The extraction of total lipids in biscuit and pizza was by the acid digestion method. All samples were analyzed by gas chromatography (GC) using a SP-2560 capillary column and a flame ionization detector. The TFA contents per 100g of sample were 1-2.8% (1.9%) in retort foods, 0.4-2.4% (1.37%) in powdered milk products, 0-2.9% (1.23%) in biscuits, and 2.8-3.45% (3.03%) in pizzas.
일본과 한국의 기능성 유제품의 규격기준 및 시장현황에 관한 연구
박다정,이단원,박정민,신진호,김지연,전상록,송태석,윤성식,김진만,Bak, Da-Jeong,Lee, Dan-Won,Park, Jung-Min,Shin, Jin-Ho,Kim, Ji-Youn,Jeon, Sang-Rok,Song, Tae-Suk,Yoon, Sung-Sik,Kim, Jin-Man 한국축산식품학회 2009 한국축산식품학회지 Vol.29 No.4
Changing health awareness has had an important effect on the functional food industry and is creating greater market opportunities. Unfortunately, there is no statement on functional dairy products in the Processing of Livestock Products Act. As a result, there is confusion in the market and legal difficulties with regard to the advertising of functional dairy products. This study was carried out to improve the current standardization of functional dairy products by comparing the domestic Health/Functional Food Act with the Japanese Health Promotion Law, and by investigating scientific data and articles from various literature and the Internet. In Japan, the Ministry of Health, Labor, and Welfare (MHLW) officially presented the Food with Health Claims (FHC) system that consists of Food with Nutrient Function Claims (FNFC), and innovated Food for Specified Health Uses (FOSHU). In 2005, the FOSHU system was changed to include several new subsystems: Current, Standardized, Reduction of disease risk, and Qualified FOSHU. Finally, to manufacture FOSHU, scientific evidence pertaining to such products must be examined by MHLW. Since FNFC was allowed, only 12 vitamins, ${\beta}-carotene$, and five minerals were approved, though without scientific evidence of efficacy. The Korean Health/Functional Food Act requires that health/functional foods (HFFs) be marketed in measured doses. There are two types of HFFs: generic and product-specific. There are 67 ingredients listed in the act for generic HFFs, and if an HFF has a new active ingredient, it is considered a product-specific HFF. Product-specific HFFs must be approved by the Korean Food and Drug Administration (KFDA). With the present standards, it is impossible to label and advertise functional dairy products with health/functional claims. Government agencies must cooperate to solve this problem, and standardization should be carried out by considering existing health/functional products and claims/indications from other countries.
박다정 ( Da Jung Park ),이영민 ( Young Min Lee ),정용길 ( Yong Gil Jeong ),김문정 ( Moon Jeong Kim ) 한국폐기물자원순환학회(구 한국폐기물학회) 2021 한국폐기물자원순환학회 춘계학술발표논문집 Vol.2021 No.-
폐기물의 매립은 가장 단순하고 일반적인 폐기물 처리 방법이다. 하지만 매립지 주변의 도시화로 인하여 운영 중인 매립지가 주변 환경에 미치는 영향을 최소화 하는 관리방안에 대한 관심이 증가하고 있다. 따라서 매립지의 효율적인 관리를 위해서는 매립지 침하거동을 정확히 예측하는 것이 중요하다. 폐기물 매립지의 침하거동은 일반 토목공학에서 다루는 흙의 거동과는 달리 유기물 분해에 따른 침하가 미치는 영향이 크다. 또한 각 매립장마다 반입된 폐기물의 성질이 불균질 하고, 기후ㆍ작업환경 등 침하에 영향을 미치는 요소들이 다양하기 때문에 정확한 침하거동 예측방법에 대하여 끊임없는 연구가 이루어지고 있다. 지금까지 폐기물 매립지의 장기침하거동 예측을 위하여 흙의 2차 압밀 거동 예측을 위해 사용되는 Gibson & Lo모델, 쌍곡선 모델등과 일반적인 재료의 크리프 거동 모사에 사용되었던 Power creep law 등을 사용하고 있고 모델 계수 결정에 따라 예측값에 차이가 나는 경향이 있다. 2000년도에 폐기물 매립을 시작해서 2018년도에 매립이 종료된 수도권매립지 제2매립장을 수 년 간 추적 관찰한 계측값을 통하여 수도권매립지 제2매립장의 장기침하 경향 특성을 분석하고 효율적인 매립지 관리를 위한 침하거동 예측방법을 검토하고자 한다.
열산화법으로 생성된 TiO₂ 중간보호층이 Ti/RuO₂-PdO-TiO₂ 전극의 염소발생 효율 및 내구성에 미치는 영향
박다정(Da Jung Park),최승목(Sung Mook Choi),이규환(Kyu Hwan Lee) 한국표면공학회 2018 한국표면공학회지 Vol.51 No.4
Not only efficiency of chlorine evolution reaction (CER) but also durability namely service life is very important property in dimensional stable anode for Ballast Water Management System (BWMS) for marine ships. Many researchers have been focused on improving efficiency of CER by controlling composition, phase and surface area for a long time, but the efforts to increase durability was relatively small. In this study, we have investigated the effect of TiO₂ protective interlayers on efficiency and durability of DSA electrodes. TiO₂ protective interlayers were prepared by thermal oxidation at 500, 600 and 700℃ on Ti substrate. And then the DSA electrodes consisting of Ti/RuO₂-PdO-TiO₂ were prepared by thermal decomposition method on TiO₂ interlayers. The efficiencies of CER of DSA electrodes without TiO₂ interlayer and with TiO₂ interlayer grown at 500, 600 and 700℃ were 94.19, 94.45, 84.60 and 76.75% respectively. On the otherhand, durabilities were 30, 55, 90 and 65 hours respectively. In terms of industrial aspect, the performance of DSA is considered high efficiency and durability which can correspond to total production of chlorine. If we considered the performance index of DSA as the product of efficiency and durability, performance indices could be recalculated as 28.26, 50.85, 76.14 and 49.89 respectively. As the thermal oxidation temperature increasing, life time were increased remarkerbly, while efficiency of CER was decreased slightly. As a result, DSA electrode with TiO₂ interlayer grown at 600oC has shown about 2.7 times performace of original DSA electrode without TiO₂ interlayer.