• Preventive Nutrition and Food Science
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• v.3 no.3
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• pp.234-240
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• 1998

This study attempted to determine the effect of various thawing methods and storage periods on the quality of froen cooked rice. Frozen cooked rice was thawed at four different methods, such as pressure cooking, conventional cooking, microwave heating and thawing at room temperature after 10 days, 30days and 90 days frozen storage. We conducted a physico-chemical analysis (moisture content, dehydration rates, degree of gelatinization, color value and texture) and sensory evalution on the frozen-thawed cooked rice. The study showed that there were no significant differences on the quality characteristics of frozen-thawed cooked rice during the storage period of 90 days. However, the thawing method of pressure cooking caused high moisture content, rapid dehydration rates, and a high degree of gelatinization on the cooked rice. Thus, the desirabililty for the rice diminished becaused of the excess moisture content and the change of appearance and testure in the rice due to the high temperature. There were similiar quality characteristics to the cooked rice after forzen-thawing whether by conventional cooking or by microwave heating and just after cooking. Thawing at room temperature also caused a significant decrease in quality characteristics.

• Journal of the East Asian Society of Dietary Life
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• v.6 no.3
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• pp.307-316
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• 1996

This study was carried out as part of a basic works to improve the native chicken uses. The mechanical test on the native chicken boiled plain broth and the sensory test was surveyed the preference of three kinds of chickens(native chicken, whangchu, broiler) prepared with six different cooking methods-chicken boiled plain, chicken broiled in microwave, stewed chicken, chicken fried with spice, chicken cutlet, chicken curry using 120 Yeungnam University students and graduate students as the panel. The results were as follows; The panels preferred the viscosity of chicken boiled plain broth for two hous. The viscosity of chicken boiled plain broth for two hous with the spindle at 5, r.p.m. of 20.50.100 was 8.6, 13.6, 9.9 respectively, and salt concentration was 0.40wt%. In the wensory test by cooking mehtods, the results of preference are in the following order-chicken curry, chicken cutlet, chicken fried with spice, stewed chicken, chicken boiled plain and chicken broiled in microwave. The most preferred cooking method of the native chicken, whangchu and broiler is chicken boiled plain, broiled in microwave and stewed chicken resectively. They preferred the native chicken in texture and taste. But in color, aroma and appearence among the sensory characteristics, whangchuwas preferred by the panels.

• Journal of Applied Tourism Food and Beverage Management and Research
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• v.11
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• pp.107-120
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• 2000

무, 당근 및 감자를 대상으로 조리방법 (boiling, pressure cooking, microwave cooking)에 따른 dietary fiber 성분, 수분함량 및 조직감의 변화에 대하여 조사하였으며 조직감에 영향을 미치는 성분에 대해 연구해보았다. 시료내에 존재하는 pectin의 함량은 조리시 원료시료에 비해 현저하게 감소하였으며, microwave cooking>pressure cooking>boiling의 순서로 점차 감소하였다(P<0.05). ADF, NDF 및 Cellulose, Hemicellulose, Lignin은 boiling과 pressure cooking의 경우에는 원료시료에 비해 모든 성분이 증가현상을 나타내었으며, microwave cooking의 경우에는 감소하였다(P<0.01). Hemicellulose와 lignin은 조리에 의한 영향을 거의 받지 않는 것으로 나타났으며, cellulose는 조리 방법에 따라 상당한 영향을 받는 것으로 나타났다. 조리방법에 따른 수분함량의 변화는, boiling시에는 원료시료에 비해 현저한 증가를 보였으며, pressure cooking의 경우에는 조금 감소하였으나 뚜렷한 차이가 없었고, microwave cooking시에는 현저한 감소현상을 나타내었다(P<0.001). 조리 방법에 따른 조직감의 변화는 침투시험시에는 maximum force가 raw>microwave cooking>pressure cooking>boiling의 순서로 점차 감소하였으며, 절단 시험시에는 maximum force가 microwave cooking>pressure cooking>raw>boiling의 순서로 점차 감소하였다. 관능검사 결과, 견고성은 원료시료가 가장 컸으며, microwave cooking>pressure cooking>boiling한 시료의 순서로 점차 감소하였고 씹힘성은 microwave cooking방법으로 조리한 시료가 가장 컸으며, pressure cooking>raw>boiling의 순서로 점차 감소하였다. 기계적 측정 결과와 관능검사 결과를 연관시킨 결과, 높은 연관성이 있었다. 이러한 결과로부터 조리시 시료의 견고성은 pectin의 함량과 밀접한 관계가 있어서, 즉 pectin의 함량이 증가함에 따라 견고성이 증가되는 것을 알 수 있었고, 씹힘성은 수분함량과 밀접한 관련이 있어서, 즉 수분함량이 감소함에 따라 씹힘성이 증가되는 것을 알 수 있다. 이상과 같은 결과들은 무, 당근 및 감자에 있어서 모두 같은 경향을 나타내었다.

• Food Science of Animal Resources
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• v.30 no.6
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• pp.1024-1030
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• 2010

The focus of the study was to maximize the output data for Korean cuisine. This study evaluated the nutritional retention factor for different cuts of Korean beef (Hanwoo beef) subjected to various cooking methods. Five cuts (short rib, sirloin, chuck roll, tenderloin, and fore shank) of Korean Hanwoo beef were prepared and used in this experiment. Two different cooking methods (dry-heat cooking and moisture-heat cooking) were applied to each cut. The sodium contents of dry-heat cooked short rib (86.44), sirloin (76.81), tenderloin (86.65), and fore shank (85.89) decreased. Potassium contents of dryheat cooked sirloin (94.99), chuck roll (89.19), and fore shank (92.66) decreased. Calcium contents of dry-heat cooked sirloin (61.49), chuck roll (73.97), and fore shank (91.46) decreased. Iron contents of dry-heat cooked chuck roll (79.71), and tenderloin (90.79) decreased. Phosphorus contents of dry-heat cooked sirloin (87.87), and tenderloin (99.88) decreased. Mineral contents of all cuts cooked by moisture-heat decreased. Finally, the nutritional retention factor represents output data of each cooking method with yield % of each item.

• Food Science of Animal Resources
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• v.36 no.1
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• pp.23-28
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• 2016

This study investigates the effect of cooking, storage, and reheating conditions on the formation of cholesterol oxidation products (COPs) in pork loin. Samples of pork loin procured 24 h postmortem were initially processed and assessed for total fat and cholesterol content. The cooking methods evaluated were pan roasting, steaming, oven grilling, and microwaving. Cooked pork loin samples were stored at 4℃ and reheated after 3 and 6 d of storage using the original method of preparation or alternately, microwaving. Fat content increased significantly with cooking as a result of the loss in moisture but cholesterol content remained unchanged. Pan roasting and microwave cooking caused a significantly higher production of COPs, as with the process of reheating using microwave, pan roasting, and oven grilling methods. The major COPs found in pork loin were cholestanetriol, 20-hydroxycholesterol, and 25-hydroxycholesterol, whose concentrations varied according to the different cooking and reheating methods used. Moreover, the aerobic storage of cooked pork loin under a refrigerated condition also increased the formation of cholesterol oxides on reheating.

• Journal of the Korean Society of Food Culture
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• v.37 no.6
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• pp.540-546
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• 2022

This study aimed to determine the changes in the vitamin B₅ content of raw and cooked vegetables. The nineteen vegetables were subjected to different cooking methods, viz. blanching, boiling, pan-broiling, and steaming. Vitamin B₅ was quantified by reversed-phase high-performance liquid chromatography (HPLC) using photodiode-array (PDA) detection (200 nm). The standard reference materials (SRM) were used to validate the accuracy of vitamin B₅ measurement method used in this study. The cooking yields ranged from 82.63 to 107.62% and decreased in most of the vegetables except bitter melon, curled mallow, and eggplant. The raw kabocha squash, Danhobak, had the highest vitamin B₅ content (0.671 mg/100 g) among the samples. All cooked vegetables showed lower vitamin B₅ content compared to the raw samples. The true retention ranged from 0% (crown daisy, blanching) to 84.49% (kabocha squash, steaming). These results indicate that vitamin B₅ is degraded after cooking. Pan-broiling and steaming are better cooking methods than the others for retaining vitamin B₅. The true retention of vitamin B₅ in the samples markedly depends on the cooking method and food matrix. These results can be used as important basic data for nutritional evaluation of meals.

• Korean Journal of Agricultural Science
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• v.43 no.1
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• pp.87-99
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• 2016

Phytosterol contents in nine vegetables such as paprika (red, yellow, and orange), kohlrabi, bamboo shoot, cherry tomato, cucumber, Chinese chive, and corn were analyzed by gas chromatography. Individual contents of ${\beta}$-sitosterol, campesterol, and stigmasterol in fresh and cooked vegetables (boiling, grilling, stir-frying, deep-frying, steaming, roasting, and microwaving) were determined and compared. Total phytosterol content of paprika, cucumber, Chinese chive and cherry tomato ranged from 23.19 to 46.51 mg/kg (0.002-0.005%) of fresh weight of raw vegetables. Total phytosterol content variation (%) was obtained as follows: [(the content of phytosterol after cooking) - (the content of phytosterol before cooking)] / (the content of phytosterol before cooking) ${\times}100$. Total phytosterol content was found to be high in raw kohlrabi at 138.99 mg/kg fw (0.01%), in corn at 302.86 mg/kg fw (0.03%), and in bamboo shoot at 443.15 mg/kg fw (0.04 %). Total phytosterol content variation (%) in orange paprika ranged from 27.5 to 267.3 while that in cherry tomato ranged from -11.0 to 337.5. Generally, high content variation of total phytosterol was found in stir-fried and deep-fried vegetables. Therefore, higher phytosterol levels were obtained from cooked vegetables than raw vegetables. We suggest that these data will be useful to investigate cooking methods for increased intake of phytosterols.

• Korean Journal of Human Ecology
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• v.6 no.2
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• pp.49-56
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• 2003

The effects of cooking methods on the total dietary fiber(TDF) and enzyme-resistant starch(RS) contents of nonwaxy and waxy milled and brown rices were investigated. The TDF contents of raw rices were 3.77% for nonwaxy brown, 3.41% for waxy brown, 1.37% for nonwaxy milled and 1.14% for waxy milled rices. The TDF contents were higher in brown rices than milled ones and slightly higher in nonwaxy than waxy ones. However, there were no significant differences among raw and cooked rices with. automatic electric cooker and automatic pressure cooker. The TDF contents of cooked rices did not show any increase, but that of waxy milled ones rather slightly decreased by cooking. The RS contents analysed were not significantly different between automatic electric cooking and automatic pressure cooking. The RS contents of cooked rices were 0.05∼0.06% for nonwaxy milled, 0.09∼0.12% for nonwaxy brown, 0.07∼0.08% for waxy milled, 0.11∼0.13% for waxy brown, which showed higher RS content in brown than milled ones, and in waxy than nonwaxy ones. The ratios of RS/TDF were 4.1∼4.2% for nonwaxy milled, 2.8% for nonwaxy brown, 7.5∼8.9% for waxy milled, 3.6∼3.7% for waxy brown, which showed that the higher the TDF contents, the less the contribution of RS to the TDF.

• Journal of the Korean Society of Food Culture
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• v.24 no.5
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• pp.533-539
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• 2009

Frying is the most popular cooking style used in food service institutions in Korea because fried dishes are well accepted by students. However, trans fat contents reduction have recently been required in many foods for health reasons Therefore, alternatives to frying such as oven baking or roasting are being used in many institutions. Steam convection ovens provide dry heat as well as steam so that they can be used to make a wide variety of Korean dishes. In this study, a menu acceptance test was conducted over 2 weeks. Pork, chicken, fish and potato dishes cooked by conventional cooking methods were served for 4 successive days, after which the same dishes were prepared using the oven. Overall, 322 junior high school students evaluated the traditionally cooked foods, while 316 evaluated the oven cooked foods. Comparison of the foods prepared using both methods only revealed a significant difference in the acceptability of foods on the fish menu (p<0.05). Specifically, the acceptance of fried fish was higher than that of the oven baked fish. Additionally, overall acceptance of the menu by males was higher than the acceptance by girls. Furthermore, students who had the preference for special ingredients showed a higher menu acceptance for the menu cooked with those ingredients. On average, approximately 25% of the meal was not consumed and left as plate waste. The portion of the fried fish not consumed was smaller than that of the oven cooked fish, but the portion not consumed did not vary based on cooking method for any other foods evaluated. Overall, it is expected that the oven cooking method will be a good substitute for frying or other cooking method for traditional Korean dishes.

• Journal of the Korean Society of Food Culture
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• v.9 no.1
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• pp.23-41
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• 1994

In this study kinds of Lamb cooking and preservation and the ingredients of lamb cooking are surveyed through the references written from 1670 to 1943. The lamb cooking found in the literature totaled to more than 53. They can be classified into fourteen different groups according to their processing features which as follows: Salnum and Pyunyuk(boiled and slices of boiled), Kui(roasted), Chim(steamed), Whe(raw meat), Hounjae(smoking), Po(dried), Juk(gruel), Tang(soup), Sundae(stuffed small interstines), Jokpyun(jellied foot), Jungol(happiness pot), Sikhae(salt+meat+malt), Oumjang(salted meat), Kunjo(dried). Korean lamb cooking methods were primarily adopted from Mogolia in late Korea Dynasty but they had unique characteristics different from Mongolian ones. Furthermore, they were creatively applied to other meat cooking such as beef, pork and dog. About twenty one ingredients were mainly used in lamb cooking, including fresh meat, ribs, breast, heart, liver and the like. In particular, most popularly used ones were fresh meat and the heart in internal organs, which coincide with the main ingredients in beef cooking of today. The number of seasoning used in lamb cooking was twelve and especially salt, vineger, ginger and stone leek were most commonly used ones. Fourteen other addition were put into lamb cooking and the rice(Korean) wine was the most frequently used addition.