• 한국식품과학회지
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• 제26권6호
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• pp.683-689
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• 1994

With a view to utilizing effectively fish skin wastes from marine manufactory, a gelatin solution extracted from yellowfin sole skin was fractionated by precipitation with ethanol, and then the functional and physico-chemical properties for the fractionated gelatin were determined. Ethanol was added up to 50% of ethanol content to a gelatin solution extracted from yellowfin sole skin, then the mixture was left to stand at $0^{\circ}C$ for 12 hours. Finally, the precipitates were dried by hot-air ($40^{\circ}C$). The gel strength and melting point of a 10% gel of gelatin prepared from yellowfin sole skin by precipitation with ethanol has 322.4g and $23.3^{\circ}C$, respectively. The physico-chemical properties of the ethanol treated fish skin gelatin were superior to those of fish skin gelatin prepared without ethanol treatment. Besides, the functional properties of the ethanol treated gelatin were lower in solubility and higher in water holding capacity, oil binding capacity, emulsifying activity, emulsifying stability, foam expansion and foam stability than those of pork skin gelatin sold on market as well as gelatin prepared without ethanol treatment. It may be concluded, from these results, that the fish skin gelatin prepared by precipitation with ethanol can be effectively utilized as a human food by improving the functional properties.

• Journal of Nutrition and Health
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• 제1권2호
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• pp.87-91
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• 1968

Food and nutritional survey was made on two kinds of milk (one: 30 samples of bottled milk, the others: 30 samples of prepared milk), which are bottled market cow milk in Seoul city to examine the general ingredients, adulteration and degeneration. The results of survey indicated that the bottled milk delivered to home is relatively better than the prepared milk from the view point of food and nutrition. Moreover the quality of the prepared milk is poor because of adulteration through adding water or skim milk powder in order to increase quantity, consequently the prepared milk is under the nutritional standard. However it indicated that some of the bottled milk are rather inferior from the view point of food and nutrition, so certain measure is required for improving the quality of bottled and prepared milk. Most of the bottled milk and the prepared milk containing Coli-form bacteria have a possiblity to harm the citizen's health as a medium of infectious disease, such a fact is really serious problem from the view point of the national health, considering the general trend of milk consumption increase. It is urgent for us to take a scientific inspection on the sanitary management and take a formidable measure in handling of milk.

• 한국식생활문화학회지
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• 제36권6호
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• pp.640-648
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• 2021

In this study, when manufacturing Yakgwa, 0, 25, or 50% of embryonic rice flour (ERF) was substituted for wheat flour (WF) to make the dough. After making Yakgwa by hot air frying (HF) or deep-fat frying (DF) methods, physicochemical characterization and acceptance tests were conducted. ERF had a higher water-binding capacity and a lower fat-binding capacity than WF (p<0.05). Yakgwa prepared by HF had lower crude fat contents, peroxide values, and expansion rates, but higher hardnesses, lightnesses, and rednesses (p<0.05) than that prepared by DF. Higher ERF substitution ratios reduced acid values and expansion rates and increased hardness (p<0.05). Acceptance testing showed 0% ERF Yakgwa prepared by HF had a significantly higher acceptance than Yakgwa prepared by DF. HF was found to have a positive effect on product acceptability. Yakgwa prepared with the DF method by substituting WF with ERF resulted in better flavor and overall acceptability than Yakgwa prepared with WF alone (p<0.05).

• 한국식생활문화학회지
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• 제31권2호
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• pp.178-187
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• 2016

The principal objective of this study was to investigate the quality characteristics of Yukwa prepared with chlorella powder. The tested concentrations of chlorella powder were 0, 1, 2, and 3%. As more chlorella powder was added, spread ratio, moisture content, and volume increased, whereas L-value and a-value decreased and b-value increased. The hardness of Yukwa made with 3% chlorella powder was highest among the samples. The results of the sensory evaluation test show that Yukwa with 1% chlorella powder was significantly more preferable in term sof overall acceptability. The acid value and peroxide values were lower in Yukwa prepared with chlorella powder than the control. Yukwa prepared with chlorella powder showed strong inhibition of lipid oxidation. Thiobarbituric values were lower in Yukwa prepared with 2% chlorella powder compared to Yukwa prepared with 1% and 3% chlorella powders and control Yukwa. These results suggest that chlorella powder can be applied to Yukwa for high quality and functionality.

• 한국식품과학회지
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• 제32권5호
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• pp.1173-1178
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• 2000

본 연구에서는 크림이 첨가된 난백젖산균발효식품에서 Lactobacillus acidophilus(KCTC 2182)생균수의 경시적인 변화, 크림 첨가 난백젖산균발효식품으로 만든 아이스크림의 관능적인 특성과 경도를 조사하여 다음과 같은 결과를 얻었다. (1) 크림의 첨가비율이 높을수록 젖산균 생육곡선의 stationary phase가 연장되고, 발효시간별 생균수도 높은 경향을 나타냈다. (2) Formula 4(크림 첨가비율 40%)와 Formula 5(크림 첨가비율 50%)로 만든 아이스크림의 관능적 특성이 다른 시료보다 우수하였으며, Formula 4의 15시간 발효시료가 아이스크림 제조원료로서 적합하였다. (3) 경도의 측정 결과를 보면 크림의 첨가비율이 증가할수록 경도가 감소하여 Formula 5의 경도가 가장 낮았다.

• 한국식품영양학회지
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• 제33권1호
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• pp.86-90
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• 2020

Herb soy sauce was prepared by extracting rosemary, lemon balm, spearmint and peppermint at a low temperature in fresh soy sauce. The antioxidant and physicochemical properties of herb soy sauces were examined. Herb soy sauces were prepared by adding 2.5% (w/v) of herbs to fresh soy sauce at 60℃. The total polyphenol, DPPH%, ABTS% increased with extracting time but five minutes extraction with sufficient antioxidant herb soy sauce could be prepared. The antioxidant powers of herb soy sauces were higher in lemon balm extract, and the rosemary extract showed the lowest. Soy sauces added with herbs had lower pH and salinity (p<0.05) and higher sugar content than without herbs. The colorness according to the type of herbs showed significant difference.

• Food Science and Biotechnology
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• 제17권3호
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• pp.527-533
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• 2008

For preparation of high quality kochujang by the traditional fermentation method, 4 types of kochujang were prepared with brick- or grain-shaped meju fermented with different strains (Aspergillus sojae, Aspergillus oryzae+Bacillus subtilis). After 100 days of fermentation at $25^{\circ}C$, the moisture, pH, salt, and ethanol content of kochujang were 40.52-43.20%, 4.71-4.82, 8.7-9.1%, and 0.75-0.94%, respectively, showing slight differences according to the strains and shapes of meju. Titratable acidities were slightly increased for up to 60 days of fermentation. The amino-type nitrogen content of kochujang prepared with brick-shaped meju (A. oryzae+B. subtilis) was the highest (164.20 mg%) among all of the kochujang types. The redness (a) value of kochujang prepared with brick-shaped meju (A. sojae) were higher (19.08) than those of other treatments (18.37-18.59). Sensory evaluation of kochujang prepared with grain-shaped meju (A. sojae) showed the highest scores for color and overall acceptability, 'at $6.43{\pm}1.87$ and $6.29{\pm}1.44$, respectively. It was estimated that high quality kochujang could be made by using meju fermented with selected strains.

• Asian-Australasian Journal of Animal Sciences
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• 제28권7호
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• pp.1020-1027
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• 2015

The combined effect of tumbling marination methods (vacuum continuous tumbling marination, CT; vacuum intermittent tumbling marination, IT) and effective tumbling time (4, 6, 8, and 10 h) on the water status and protein properties of prepared pork chops was investigated. Results showed that regardless of tumbling time, CT method significantly decreased the muscle fiber diameter (MD) and significantly increased the total moisture content, product yield, salt soluble proteins (SSP) solubility, immobilized water component (p<0.05) compared with IT method. With the effective tumbling time increased from 4 h to 10 h, the fat content and the MD were significantly decreased (p<0.05), whereas the SSP solubility of prepared pork chops increased firstly and then decreased. Besides, an interactive effect between CT method and effective tumbling time was also observed for the chemical composition and proportion of immobilized water (p<0.05). These results demonstrated that CT method of 8 h was the most beneficial for improving the muscle structure and water distribution status, increasing the water-binding capacity and accelerating the marinade efficiency of pork chops; and thus, it should be chosen as the most optimal treatment method for the processing production of prepared pork chops.

• 한국식품조리과학회지
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• 제23권2호통권98호
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• pp.261-269
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• 2007

This study was performed to provide basic data for the sous vide cook-chill(SVCC) System by comparing and evaluating food quality, according to preparation method and days of storage, of foods that were prepared by SVCC to those prepared using the cook-chill(CC) System. Boiled quail eggs and fish paste in soy sauce were prepared using CC and SVCC and their quality was evaluated at the time of preparation and by days of storage. Viable cell counts were increased to 5.65(CC) and 3.40(SVCC) LogCFU/g by 15 days(p<.0001) and increased more over time in foods prepared with CC than with SVCC. For the CC method, Coliform counts increased to 4.58 LogCFU/g by 15 days(p<.0001). With SVCC, colirorms were not detected at 0 days, but counts reached 3.70 LogCFU/g by 15 days(p<.0001). After reheating, no coliforms were detected for CC or SVCC at 0 days, however, by 15 days, coliform counts reached 3.61 and 2.52 LogCFU/g(p<.0001) for CC and SVCC, respectively. Finally, the sensory scores of SVCC were higher than those of CC.

• 한국식품저장유통학회지
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• 제17권4호
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• pp.478-486
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• 2010

최적화된 분자압축 탈수건조 생강에 열풍건조, 동결건조, 재사용 탈수액을 사용한 탈수건조 생강을 비교하여 품질평가를 실시하였다. 품질평가항목은 일반성분, 색도, 수분흡수지수(WAI) 및 수분용해지수(WSI), 총당, 환원당, DPPH 항산화활성 측정, gingerol 함량 측정을 통하여 생강의 품질을 비교하였다. 일반성분의 경우 분자압축 탈수 건조한 생강이 열풍건조 및 동결 건조한 생강보다는 낮았지만 이는 탈수액으로 성분이 용출되는 공정의 특성의 차이로 나타나는 현상이였다. 색도에서는 분자압축 탈수 건조한 생강이 다른 건조조건의 생강보다 원물의 상태의 색을 유지하였다. 수분흡수지수(WAI) 및 수분용해지수(WSI)에서는 열풍 건조된 시료가 수분흡수지수가 가장 높았고 분자압축 탈수 건조한 시료는 표면수분을 적용한 수분함량과 수분활성도에 비교하여 낮게 나타났다. 이 결과를 통하여 판단할 때 분자압축 탈수공정을 적용한 생강이 수분흡수지수(WAI)와 수분용해지수(WSI)에서 우수하다고 판단된다. 총당의 경우 유의적인 차이는 없었지만 분자압축 탈수 건조한 생강이 비교적 높았다. 환원당은 열풍 건조한 생강시료가 비교적 높았으며 이는 갈변에 영향을 미친다고 판단된다. DPPH를 통한 항산화활성 측정에서 BHA, BHT 보다 낮았지만 다른 건조방법 보다는 분자압축 탈수 건조한 생강이 항산화활성이 높았다. Gingerol 함량 측정은 건조방법에 따라한 건조한 분말을 측정하였으며 동결건조가 가장 우수하였다. 하지만 분자압축 탈수건조한 생강의 경우 다른 건조방법 보다는 낮았지만 탈수액에 형성되는 gingerol이 발생하기 때문에 활용가치와 기능성면에서 우수하다고 판단된다. 이 처럼 모든 품질평가 항목의 결과를 통하여 분자압축 탈수건조가 이전에 열풍건조와 동결건조보다 품질이 우수하고 시설과 가격에서 경쟁적으로 우수하며 활용가치와 기존의 건조방법의 단점을 보완해 주는 건조방법으로 판단이 되어진다.