• Title/Summary/Keyword: 튀김

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Comparison of Oxidative Stability for the Thermally-oxidized Vegetable Oils using a DPPH Method (DPPH법에 의한 식용유지의 열산화 안정성 비교)

  • Lee, Jae-Min;Chang, Pahn-Shick;Lee, Jae-Hwan
    • Korean Journal of Food Science and Technology
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    • v.39 no.2
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    • pp.133-137
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    • 2007
  • The 2,2-diphenyl picrylhydrazyl (DPPH) method, which can be used to predict the oxidative stability of edible oils, was previously reported by our research group. Not only free radical scavenging antioxidants but also radicals from oxidized oils are capable of reacting with DPPH radicals, thereby reducing the absorbance of DPPH. In this study, the optimum sample size of edible oils for the DPPH method was determined, and the oxidation of the edible oils was monitored via DPPH, coupled with other conventional methods. The optimum sample size was determined as 1.5 g using soybean oil. Soybean, corn, virgin olive, and refined olive oils were thermally oxidized for 3 hr at $180^{\circ}C$ and analyzed via DPPH, conjugated dienoic acid (CDA) value, and p-anisidine value (p-AV) protocols. Soybean and corn oils were found to be more sensitive to thermal oxidation than virgin and refined olive oils, on the basis of the CDA value and p-AV measurements. The DPPH method can indicate the inherent radical scavenging activity of unoxidized samples, the time required for the depletion of antioxidants, and the rate of degradation of the antioxidants. The soybean and corn oils evidenced higher levels of free radical scavenging compounds, required more time for the consumption of inherent antioxidants, and also manifested steeper antioxidant degradation rates than olive oils, based on the results of DPPH analysis. The DPPH method, accompanied by other conventional methods, may prove useful in predicting the degree of oxidation of vegetable oils.

The Study on the Thermal Oxidation of Mixed Rapeseed Oil with Coconut and Palm Oil (혼합 유채유의 가열산화에 관한 연구)

  • 현영희
    • The Korean Journal of Food And Nutrition
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    • v.15 no.4
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    • pp.342-349
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    • 2002
  • Rapeseed oil is easily oxidized due to the high contents of unsaturated fatty acid such as linoleic acid and linolenic acid. For stability of rapeseed oil oxidation, a special process is required. Two kind of simple and interesterifying mixed rapeseed oil were prepared according to add 30%, 50% and 70% of coconut oil and palm oil. Sample oils were heated at 180${\pm}$5$^{\circ}C$ for 5, 10, 15, 20, 25, 30 and 35 hours. Then the physicochemical properties such as the tendency of oxidation were investigated. The initial AV and POV of interesterifying mixed rapeseed oil were higher than those of simple mixed oil. But the tendency of oxidation were similar. While oxidation rate of similar and interesterifying mixed rapeseed oils with coconut oil and palm oil were lower about than those of rapeseed oil.

Influence of Consumption Patterns and Satisfaction for Convenience Store Private Brand Foods (편의점 PB식품군 구매행동 및 만족도 영향요인 연구)

  • Kim, Min-Jeong
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.17 no.3
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    • pp.629-637
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    • 2016
  • This study examined the purchasing behavior and satisfaction of people with convenience store PB foods. The factors affecting the purchasing behavior and the overall satisfaction with the convenience store PB foods were examined. This study first found that the purchasing motivation of PB foods is the cheaper price than NB foods. Second, age is a statistically effective variable for the visit frequency at the convenience store and gender and age are effective variables for the purchase frequency of PB foods. Third, there is a statistically positive correlation of convenience store brand preference with the PB food brand preference for 6 food categories. Next, in terms of the attribute-level satisfaction, the most satisfied areas are diverse food groups and diverse food taste and the least satisfied areas is price. This is followed by taste and design/packaging influence overall satisfaction. From this analysis, the following suggestions were drawn. First, because consumers are likely to be matched convenience store brand preference and PB food brand preference, advertising is necessary to ensure that the consumers continue to visit the convenience store. Second, product improvement by increasing the quality should be designed to motivate the major consumer group of people in their 20s and 30s. Finally, to boost PB food satisfaction, the industry should improve the taste and design/packaging.

Survey on packaging status and sensory quality of fresh-cut mushrooms from retail markets (유통 중 신선편이 버섯 제품의 포장실태 및 관능적 품질 조사)

  • Choi, Ji-Weon;Lee, Hye-Eun;Lee, Ji-Hyun;Kim, Yong-Phil;Kim, Ji-Gang
    • Journal of Mushroom
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    • v.12 no.4
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    • pp.287-292
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    • 2014
  • This study investigated the packaging status and sensory quality of fresh-cut mushroom products from retail markets. Fifty one fresh-cut mushroom products were surveyed / purchased from discount stores in four cities in January (winter), March (spring), August (summer), and October (autumn) 2009. Collected fresh-cut mushrooms include single variety products like whole oyster mushroom and winter mushroom, diced or sliced oak mushroom, sliced king oyster mushroom, and ready-to-cook mixed mushroom products. Most fresh-cut mushrooms were packed in trays made of aluminum, polystyrene (PS), polyethylene terephthalate (PET), nylon materials covered with PVC (polyvinyl chloride) wrap or solid PP (polypropylene) and PS. Eighty nine percent of the covers were labeled with manufacture and expiration date. Collected samples showed severe browning (10%) and off-flavor (4%). The percentage of products with a rating of 'good' or better in overall quality was 90%. Moreover, Survey showed seasonal differences in sensory qualities. All of the collected fresh-cut mushrooms in autumn and winter had high marketability. However, Mushroom products collected in spring and summer had lower quality, hence requires treatment to prevent browning and off-flavor.

I. Morphological Studies on the Ear Characters of Korean Indigenous Corn Lines (재래종 옥수수 수집종에 대한 특성조사)

  • Bong-Ho Choe;In-Sup Lee;Ja-Sung Cho;Jong-Sung Park
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.23 no.1
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    • pp.36-43
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    • 1978
  • Ears collected from 500 regions were phenotypically observed for their ear and kernel characters. Characters studied included ear shape, kernel color, kernel density, ear row number, starch quality, pop corn and waxy corn, ear length, ear diameter, kernel length, kernel width, kernel weight, ear weight, and 100 kernel weight. The Korean local corn collected were mostly flint type and were very diverse in all the characters studied. The collected local corn would be very promising for providing good germplasm for corn breeding in the future.

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Effect of Dietary Cinnamon Powder on Savor and Quality of Chicken Meat in Broiler Chickens (닭고기의 품질 및 맛에 관한 계피 급여효과)

  • Park, Byung-Sung
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.37 no.5
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    • pp.618-624
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    • 2008
  • A 35-day trial was carried out to determine the influence of dietary cinnamon powder (CNP) on the sensory evaluation and quality of chicken meat, carcass characteristics, plasma lipid level and growth performance of broiler chickens. There were 5 treatment groups: control; CNP 2.0%; CNP 3.0%; CNP 4.0%; and CNP 5.0%. The body weight of the broilers fed the diets containing 3.0% CNP was higher than the broilers fed the control feeds (p<0.05). The concentration of triacylglyceride, HDL-C was higher in the plasma from broiler chickens fed diets with CNP (p<0.05) but the concentrations of total cholesterol and LDL-C were significantly lower (p<0.05) compared to the control group. The carcass percentage, chicken breast and thigh weight were not different between the CNP and control groups. The WHC was significantly higher in the chickens fed 4% CNP diet, while the TBARS was significantly lower (p<0.05) in the chickens fed 3% CNP diet compared to the control group. The color of the breast muscle from the chickens fed 3% CNP diet was lighter than those from the control groups (p<0.05). The sensory evaluation of the taste and savor related to CNP in fried or boiled chicken meat were significantly better from the broiler chicken fed diets containing CNP than the control group (p<0.05). These results suggest that dietary cinnamon powder may improve savor and quality of chicken meat in broiler chickens.

Study on Establishment of Food Material Size Specification Based on Elementary School Menus (초등학교 급식 식단별 식재료 크기 설정에 관한 연구)

  • Kim, Eun-Mi;Hong, Sang-Pil;Lee, Min-A;Jeong, Mi-Kyoung;Cho, Tae-Oc
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.37 no.8
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    • pp.1058-1068
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    • 2008
  • This study was conducted to establish size specification of food material for elementary school meals, researched at school meal scene and surveyed with questionnaires about the management of food materials by workers devoted to preparing school meals. Most subjects (80.7%) answered that students were served smaller size than adults, whereas 11.0% answered that they served different sizes according to school age and 8.3%, that they served same size as adult. About the food material size specification for elementary school student, a majority of respondents reported that 3/4 or 2/4 of adult served size was suitable. The serving size was decided and executed to investigate the actual intake and the preference of students for food size by 2 methods, intake ratio and questionnaire in 6 elementary schools. It showed that intake ratio and preference of students may be changed by serving size. According to the result, food serving size was divided in 3 types per menu and food size was measured precisely using the white board inscripted calibration. Actual food serving size for adult and recommended food serving size for elementary school student was compared. The data collected were coded and used to decide food material specifications for 12 cooked vegetable items, 15 raw vegetable items, 9 kimchi items, 2 fermented fish and fish sauce items, 8 deep-fried items, 5 meat and meat product items, 19 fish items and 5 dried food items.

Preparation and Quality Analysis of Fish Paste Containing Styela clava Tunic (미더덕 껍질 분말을 함유한 어묵의 제조 및 품질 분석)

  • Choi, So-Yeon;Choi, Eun-Yeong;Lee, Kyung-Eun;Song, Ae-Sun;Park, So-Hyeon;Lee, Seung-Cheol
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.41 no.11
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    • pp.1591-1595
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    • 2012
  • Styela clava (Korean name: miduduk) tunic was produced as a byproduct after processing of S. clava. To utilize S. clava tunic, fish paste containing tunic powder was prepared, and quality characteristics were evaluated for color, textural properties, and sensory attributes. Increasing the amount of S. clava tunic in fish paste tended to decrease lightness (L), redness (a), and yellowness (b) values of the surface part of fish paste. Strength and hardness of fish paste increased with increasing amount of tunic. All test samples with 3 mm thickness showed good flexibility and did not break even after folding in half four times. For overall acceptance in the sensory evaluation, fish paste containing 1% S. clava tunic acquired a relatively higher score. These results suggest that S. clava tunic can be applied to fish paste products to improve quality and functionality.

Satisfaction and Preference of School Foodservice on Elementary School 4th, 5th and 6th Grade Students in Gunpo City (군포시 초등학교 고학년의 학교급식 만족도 및 기호도)

  • Yang, Sun-Ae;Jung, Eun-Hee;Rhie, Seung-Gyo
    • Proceedings of the Korean Society of Community Living Science Conference
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    • 2009.09a
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    • pp.78-78
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    • 2009
  • 학교급식에 대한 기호를 충족시키고, 식습관 개선을 위한 방안을 모색하여 급식의 효과를 증대시키기 위한 목적으로 본 연구를 실시하였다. 학교급식으로 제공되는 메뉴를 중심으로 음식의 맛을 잘 표현할 수 있는 4, 5, 6학년(남학생 273명, 여학생 209명)을 대상으로 급식 만족도와 기호도를 조사했다. 전반적인 급식만족도는 5점 척도로 3.20점을 보여 대체로 만족하였으며, 그 이유는 좋아하는 메뉴가 나와서(57%)가 가장 높은 빈도를 보였다. 급식에 바라는 점도 역시 맛있는 음식제공(44%)을 우선 원하는 것으로 나타났다. 불만족의 이유는 싫어하는 메뉴가 나와서(50%), 기다리는 시간이 길어서(23.9%), 청결하지 않아서(13.3%), 배식담당자가 불친절(12.2%)해서의 순이었다. 전반적인 급식만족은 성별에 따른 유의적 차이는 없었으며, 식단에 대한 만족도로서 새로운 메뉴 및 양, 환경 만족도로서 위생환경과 서비스 모두 3.0을 넘는 평균값을 보였다. 음식조리별 기호도를 보면, 밥류는 흰쌀밥(3.59)과 보리밥(3.63)이 기호도가 높았고, 일품요리는 스파게티(3.91)와 김치볶음밥(3.70)이 가장 높은 기호도를 보였으며, 오징어덮밥(2.95)이 가장 낮았다. 국류의 기호도는 어묵국(3.37), 수제비국(3.26)을 비교적 선호했으며, 북어국(2.56)을 가장 낮게 평가하였다. 찌개류는 부대찌개(3.61), 김치찌개(3.56)를 좋아했으며, 탕류는 육개장(3.85), 갈비탕(3.77)을 선호하였다. 볶음류 중에서는 떡볶이(4.05)와 소시지볶음(4.04)을 선호하였고, 잡채는 여학생이 남학생보다 더 좋아하였다. 조림류로 돈육메추리알조림(3.48)은 선호하지만, 생선조림(2.78), 콩조림(2.37)은 기호도가 낮았다. 튀김류는 대부분 높은 점수를 보였고(핫도그 3.80, 돈까스, 3.66), 무침류는 쫄면(3.43), 골뱅이무침(3.05), 찜류는 닭찜(3.61), 고추장갈비찜(3.54), 계란찜(3.51) 순으로 좋아하였으며, 전류는 계란말이(3.93), 김치전(3.57), 쌈류는 무쌈(3.36), 상추쌈(3.25)을 좋아하였다. 샐러드류는 감자샐러드(3.25), 과일떡샐러드(3.39)를 좋아하였고, 후식류는 여학생이 꿀떡(4.06), 메론(4.03)을 선호하였고, 방울토마토(3.44)는 가장 낮은 기호도를 보였다. 대체로 성별 차이는 보이지 않았으나, 육류 및 육가공품에 대한 기호가 높은 반면, 채소류나 어패류의 기호도는 낮으므로 이들을 이용한 다양한 조리법과 새로운 메뉴 개발에 대해 연구할 필요가 있다. 또한 기호도가 낮아도 영양적으로 우수한 음식은 식단에 사용하되 영양교육을 통하여 섭취를 권장하는 방안도 필요하다. 학교급식에 대한 불만족요인을 해소하기 위해서는 메뉴 개선 외에 기다리는 시간을 줄이고, 청결한 위생관리와 친절한 태도 등을 위한 노력이 필요할 것이다.

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Improved Preservation and Shelf-life Extension of Fish Cake by Modified Atmosphere Packaging (변형기체포장에 의한 어묵의 저장성 향상 및 유통기한 연장)

  • Park, Su Yeon;An, Duck Soon;Kang, Jun Soo;Lee, Dong Sun
    • KOREAN JOURNAL OF PACKAGING SCIENCE & TECHNOLOGY
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    • v.23 no.2
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    • pp.75-81
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    • 2017
  • Modified atmosphere packaging (MAP) of vacuum, 60% $N_2/40%$ $CO_2$, 100% $N_2$ and 100% $CO_2$ were examined to preserve fried fish cakes and extend their shelf life. When product packages in air were stored at 5, 10, and $15^{\circ}C$ with measurement in quality attributes, aerobic bacterial growth was found to be primary quality factor to determine the shelf life of the product. Huang's model was adopted to obtain the parameters for use in shelf life determination for a variety of packaging and storage conditions. Temperature dependence expressed in Arrhenius equation showed activation energies of 139.4 and 41.8 kJ/mol for inverse of lag time and growth rate of the microbial spoilage, respectively. MAP of 100% $CO_2$ could double the product shelf life at $10^{\circ}C$ compared to air package. High $CO_2$ concentration MAP at low temperature was found to be effective to prolong the shelf life.