• 한국축산식품학회지
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• 제44권2호
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• pp.408-429
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• 2024

The color, lipid oxidation, heme iron (HI) and non-heme iron (NHI) contents, metmyoglobin content and Soret band of myoglobin of ground pork subjected to supercritical CO₂ treatment under different conditions, or to heat treatment (40℃, 2 h) and subsequent storage at 4℃ were evaluated during 9-day period. Supercritical CO₂ treatment significantly increased CIE L^* and CIE b^* values of ground pork during subsequent storage, while the HI content was slightly affected. In general, CIE a^* value and metmyoglobin content were decreased. Supercritical CO₂ treatment for 2 h could increase the thiobarbituric acid-reactive substances (TBARS) value, while treatment for 1 h or less had no effect. The NHI content could be increased only after treatment at above 40℃ or 17.2 MPa for 2 h. The Soret band of myoglobin was shifted to longer wavelength. Increasing treatment temperature from 35℃ to 45℃ could increase CIE L^*, CIE a^*, CIE b^* and TBARS values, HI and NHI contents of the ground pork, while decreasing metmyoglobin content. As the treatment pressure increased from 13.8 MPa to 20.7 MPa, CIE b^* and TBARS values were decreased, while the NHI and metmyoglobin contents were increased. However, the other parameters were unchanged. Extending exposure time from 0.5 h to 2 h could increase CIE L^*, CIE b^* and TBARS values, HI contents, while decreasing CIE a^* value and metmyoglobin content. Correlation analysis showed that the TBARS value was significantly and negatively correlated with the HI content or metmyoglobin content in samples treated at 40℃ or above for 2 h.

• 한국가정과교육학회지
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• 제9권1호
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• pp.83-94
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• 1997

The purpose of this study was to provide fundamental information for the determination on secondary Home Economics educations contents on food/nutrition. For this purpose, the Home Economics teachers’needs assessment was performed in view of three(technical, interpretive, emancipatory) systems of action. Questionnaire survey was performed. Among 564 questionnaires sent to Home Economics teachers of 396 secondary school selected by systemic random sampling 362 questionnaires were received and 335 questionnaires were analyzed for this study. As a statistical tool, SPSS/PC(sup)+ was used to analyze frequency, mean, standard deviation, T-test and ANOVA. The major findings in this study were as followings： 1. The most important system of action Home Economics teachers recognized on the contents of food/nutrition was interpretive action, followed by emancipatory action. Technical action was turned out to be the least important system of action. 2. Home Economics teachers recognized that the content of interpretive action was the most achieved action in the text book. The least achieved action was emancipatory action, and the middle was technical action. 3. The needs related to contents of emancipatory action was the highest, followed by interpretive action. The lowest needs was the contents related to technical action. 4. Home Economics teacher’s personal background and situation variables make no difference in the importance, achievement in the text book, and the needs of food/nutrition contents.

• Preventive Nutrition and Food Science
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• 제16권1호
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• pp.29-36
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• 2011

The purpose of this study was to investigate the phytochemical contents and biological activities, including $\alpha$-glucosidase inhibitory activity and antioxidant activity, from the fruits of Elaeagnus multiflora using different solvent systems. The 50% ethanol extract of this species showed the most potent $\alpha$-glucosidase inibitory activity (88.5%) at a concentration of 1 mg/mL. Moreover, this extract also displayed the strongest antioxidant activity in each assay, showing 96.3% in DPPH scavenging activity, 98.2% in ABTS scavenging activity, and 2.5% in reducing power. The highest total phytochemical contents, including flavan-3-ols, phenolic acids, and flavonoids, were observed in the 50% ethanol extract. Interestingly, flavan-3-ols (3.150 mg/g) were detected at a significantly higher total content than those of phenolic acids (0.380 mg/g) and flavonoids (not detected). Additionally, the contents of individual phytochemicals showed remarkable differences, especially the epicatechin gallate (2.008 mg/g) and gallic acid (0.099 mg/g), which were the predominant constituents of each phytochemical type. Therefore, our results suggest that the 50% ethanol extract of E. multiflora fruits has strong biological activities, which are correlated with high phytochemical contents.

• 한국조리학회지
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• 제23권3호
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• pp.158-165
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• 2017

This study examined the components and physicochemical properties of citrus peel as a natural health food source by measuring the general and antioxidative contents of citrus peel. Total contents of carbohydrates, crude protein, crude lipid, and ash were 72.1%, 6.6%, 1.3%, and 3.7% respectively. Caloric content of citrus peel was 334.5 kcal, while total dietary fiber was 32.1%. Regarding mineral contents, Ca was the most abundant mineral, followed by K, Mg, and P. Total phenol contents of the 70% ethanolic extracts of citrus peel was $66.4{\pm}8.74mg\;GAE/g$. Total flavonoid contents of the 70% ethanolic extracts were $14.4{\pm}3.28mg\;RE/g$. The antioxidative activities of citrus peel were significantly increasing in a dose dependent manner on DPPH (1,1-diphenyl-2-picrylhydrazyl) radical scavenging, ABTS (2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt) radical scavenging, FRAP(ferric reducing antioxidant power) activity and reducing power. Therefore, the general nutrients and other antioxidant bioactive materials in citrus peel proved that citrus peel possesses a high potential materials as a nutritious food.

• 대한지역사회영양학회지
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• 제4권1호
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• pp.74-82
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• 1999

This study evaluated the quality of meals served by the elementary schools in Muan based on nutrient contents and food diversity. The contents, nutrient densities and nutrient adequacy ratios(NAR) of most nutrients were higher than those calculated from the Korean RDA. However, the content, nutrient density, and NAR of iron were lower than those calculated from the RDA for 10 to 12 year old girls. The content of sodium was somewhat high. The average number of different kinds of food and dishes per meal were 19.2 and 6.0, respectively. The more the number of dishes, the higher the NARs of calcium, calories, niacin, phosphorus and protein. However, the NAR of iron showed no correlation with the number of dishes. The meals belonging to the food group intake pattern containing fruits had more vitamin C and fiber, and less protein, lipid, and phosphorus than those belonging to the food group intake pattern not containing fruits. In conclusion, the quality of nutrition of meals served by school lunch program(SLP) was considered fairly good. However, the nutritionists should consider the iron for 10 to 12 year old girls and cut down the amount of sodium. In addition, unless the children prefer the foods served by SLP or adjust to the general aspects of SLP, SLP can't accomplish its purposes. Therefore, we suggest that nutritionists should survey children's food preference and satisfaction with the general aspects of SLP.

• Preventive Nutrition and Food Science
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• 제2권4호
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• pp.301-303
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• 1997

To elucidate the contents of phytic acid and minerals in rice produced in Korea, samples of 68 verieties of brown rice and 9 varieties of polished rice were analyzed for phytic acid by colorimetric method, and Ca, Fe, Mg and Zn contents by the atomic absorption spectrophytometer. Selenium was measured by fluorometry. Averages of phytic acid content of the 68 brown rice were 12.6 g/kg, whereas that of the 8 polished rice were 1.83 g/kg on dry matter. Averages of Ca, Fe, Mg and Zn contents on the 68 brown rice were 111, 7.4, 1,068 and 19.1 mg/kg, and those of the polished rice were 45.6, 2.1, 250 and 14 mg/kg, respectively. A averge of selenium content of the brown rice was 38.3 $\mu\textrm{g}$/kg.

• 한국식생활문화학회지
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• 제6권3호
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• pp.293-299
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• 1991

The purpose of this study were to investigate opinions on the contents and method of the educational public information of food sanitation, to enrich education of food sanitation for consumer. Data of questionnaires were collected from 78 consumer protection association and 66 food industrial company. The results of the study were summarized as follows; The educational public contents of food sanitation appropriated is remarked as a basic knowledge in a safety of food (an additive, an agricultural medicines) and in nutrition and sanitation. The effective method of public information is suggested as a TV, Radio, utilization of periodicals and pamphlet. The crucial problem of the imported food surveyed in the consumer protection association is an agricultural medicines and a heavy metal. In the food industrial company, it is remarked that the problem occurs in deposit and storage of food from the standpoint of sanitation. Finally, improvement of sanitary condition in food selling place is suggested.

• 한국식품영양학회지
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• 제21권4호
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• pp.499-509
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• 2008

The purpose of this study was to investigate the changes in physicochemical and sensory properties of raw fruits during washing and chlorine treatments. Strawberry and banana were pre-prepared at different concentration of chlorinated water(0 ppm, 50 ppm and 100 ppm), immersion time(3 min and 5 min), and number of post-rinsing(1 time, 2 times and 3 times). The physicochemical properties such as pH, sugar contents, residual chlorine contents, color values and hardness of the fruits were analyzed, and the sensory quality were evaluated throughout the sterilization treatment process. After washing strawberry with 100 ppm chlorinated water and 3 times of post-rinsing, pH and residual chlorine contents were showed a little difference, while sugar contents, hardness, and color values(L, a and b) were reduced. In case of banana, pH, sugar contents and residual chlorine contents were not affected, and hardness and L color value were reduced. However, a and b color values of banana were gradually increased as the development of brown discoloration. Sensory properties of the samples were affected by the chlorine sterilization treatment. In overall acceptance, strawberry and banana treated with 100 ppm chlorinated water showed the lowest scores among treatments. Therefore it could be suggested that the application of 50 ppm chlorinated water for $3{\sim}5$ minutes with over 3 times of post-rinsing was the effective pre-preparation method without affecting the quality of the fruits.

• 한국식품영양학회지
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• 제29권6호
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• pp.962-970
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• 2016

Commercialized production of onion vinegar, which has biological activities formed through alcohol and acetic acid fermentation, requires standardization. The objective of this study was to determine optimal conditions of sugar contents ($11{\sim}15^{\circ}Brix$) and agitation rate (100~300 rpm) of fermenter in the alcohol-acetic fermentation for producing onion vinegar. The alcohol and total acidity contents increased, whereas contents of total sugars decreased during alcohol fermentation. Contents of alcohol of 13 and $15^{\circ}Brix$ reactants were about 8% in 36 hr and total acidities of all samples were below 0.2% in 60 hr. During acetic fermentation, total acidity increased with highest value at 9 days (3.2% in 100 rpm), 10 days (4.1% in 200 rpm) and 8 days (4.3% in 300 rpm), respectively. From these results, sugar contents ($13^{\circ}Brix$) were measured for alcohol fermentation and agitation rate (300 rpm) for fast fermentation method of vinegar. The contents of total phenols, flavonoids and quercetin in onion vinegar were 33.3 mg/100 g, 3.0 mg/100 g and 2.0 mg/100 g, respectively. Onion vinegar showed an antimicrobial activity against Bacillus cereus, Staphylococcus aureus, Listeria monocytogenes, Salmonella typhimurium, Escherichia coli and Enterobacter aerogenes. Antioxidant effect of onion vinegar was 26.23% in DPPH radical inhibition and 58.58% in superoxide dismutase like activity, respectively. Fibrinolytic activity was 1.51 plasmin unit/mL in onion vinegar. In conclusion, onion vinegar processed by alcohol and acetic fermentation had nutritional values and potential biological activities.

• 한국식품과학회지
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• 제35권3호
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• pp.342-346
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• 2003

본 연구는 국내 유통되고 있는 207건의 음료류에 대하여 납, 카드뮴, 비소, 주석함량은 습식분해 후 유도결합플라스마분광기(ICP), 원자흡광광도계(AAS)를 사용하여 분석하였으며 수은함량은 수은분석기 등을 이용하여 측정하였다. 그 결과는 다음과 같다. [단위: min-max(mean), mg/kg]; Hg 0.0001-0.0025(0.0004), As 불검출-0.0245(0.0003), Pb 불검출-0.089(0.004), Cd 불검출-0.006(0.001), Sn 불검출-45.36(1.97). 본 조사결과 우리나라에서 유통되고 있는 음료류 중 납 등 중금속 함량은 외국의 모니터링 결과와 유사하였다. 또한 우리나라 국민이 음료류를 통한 중금속 섭취량은 FAO/WHO에서 설정한 잠정주간섭취허용량의 약 $0.01{\sim}0.06%$ 이하로 매우 낮았다.