In order to globalize Korean foods successfully, it is necessary to understand foreigners' attitudes about ethnic foods and how foreigners perceive Korean foods. It would be valuable to survey the degree of interest from foreigners when purchasing Korean foods. Thus, a survey was performed on the most common tourists in Korea, the Japanese, Chinese and Americans. 313 respondents completed the survey on ethnic foods (16 questions), purchasing intention of Korean foods (3 questions), and socio-demographic conditions (9 questions). Factor analysis and reliability analysis were conducted to identify the indicators of attitudes toward ethnic foods. Correlation analysis was conducted to confirm the relation between attitudes toward ethnic foods and Korean food purchasing intention. From the results of factor analysis, 5 factors emerged from the 13 out of 16 questions; and were labeled new food seekers, ethnic food seekers, familiarity seekers, new taste seekers and challenge seekers. Items were analyzed to determine the differences according to nationality by using the ANOVA, and it showed that Americans have the highest Korean food purchasing intentions. The regression analysis indicated that attitude factors on ethnic foods, new foods and new taste seekers are strongly related to Korean food purchase intentions.

The study is being conducted to investigate the perceptions and preferences of the Korean kimchi by the Chinese international students in Jeonbuk area. Self-administered questionnaires were collected from 197 male (48.9%) and 203 female (51.1%) students. Statistical data analysis is being completed using SPSS v. 12.0. Approximately 95% of Chinese female and 91% of male students know about kimchi before coming to Korea through the Korean movies and dramas. The perceptions for kimchi according to the residence period showed a significantly difference 'kimchi is a nutritious and health food' (p<0.05), 'kimchi has good taste but too hot to eat' (p<0.05), and 'Kimchi is difficult to eat because of the smell' (p<0.05). Approximately 52% of Chinese female and 44% of male students consumed kimchi once or twice a day. The most popular form of kimchi among the 13 varieties was baech kimchi. Chinese female students preferred the 'kkakdugi' (p<0.05), 'chonggak kimchi' (p<0.05), and 'young radish kimchi' (p<0.05) more than the male students. The most liked reason was the 'refreshing taste' (44.8%) whereas the most disliked reasons were 'unfamiliar with eating kimchi' (28.7%) and 'sour taste' (24.2%). Approximately 85% of Chinese female and 60% of male students would like to experience making kimchis by themselves. Extended kimchi consumptions for Chinese answered 'not too fish-like smell' (36.0%), 'not too overly-ripe' (34.5%), 'not too sour' (25.4%), and 'not too hot' (25.4%). Therefore, in order to improve the awareness for kimchi among Chinese students, we need to relate kimchi with the taste of Chinese traditional foods.

The study classified 83 obese adults by constitution and had them follow a strict diet according to their constitution in order to see if the Yin-Yang method would be effective on the metabolic syndrome, which is one of the main causes of death in Korea. Overall, the application of both Yin and Yang methods improved the following factors: weight, body fat percentage, systolic blood pressure, diastolic pressure, neutral fats and total cholesterol. In particular, the Yin constitution group of men showed more improvements than the Yang constitution group. Furthermore, waist circumference and the prevalence rate of systolic blood pressure, diastolic pressure, total cholesterol and metabolic syndrome were decreased noticeably. Total energy intake was increased in both men and women after the constitutional diet, along with the increase of nutrient intake, such as dietary fiber, vitamins and minerals, among others. Among various nutrients, vitamin A, vitamin C, thiamine, vitamin B6, folic acid, calcium, phosphorus, potassium, magnesium and iron intake were increased noticeably after the constitutional diet. In addition, subjects' intake of all nutrients, except for magnesium, satisfied the nutrition intake standards. Further, the nutrients adequacy ratio (NAR) and the mean adequacy ratio (MAR) improved for both men and women. The intake of potatoes, starch, greens and mushrooms increased noticeably, whereas the intake of meat, dairy, drinks and alcohol decreased after the constitutional diet. For the Yin constitution, the intake of Yin foods noticeably decreased, where as the intake of Yang foods decreased for the Yang constitution. In conclusion, the constitutional diet effectively improves the metabolic syndrome. Among many nutrients, the intake of dietary fiber, vitamins A, C and E, potassium and magnesium is positively associated with the improvement of metabolic syndrome biomarkers.

본 연구에서는 성인기 초반에 있는 대학생 271명(남성 155명, 여성 116명)을 대상으로 야식으로부터 섭취하는 열량의 비율에 따라 야식 비섭취군, 25% 미만 야식군, 25% 이상 야식군으로 나누어 조사한 후, 야식으로부터 섭취하는 열량의 비율에 따른 군간 생활 습관 및 식습관, 영양소 및 식품섭취 상태, 영양의 질적 지수를 평가하였으며, 야식으로부터의 식품 및 열량 섭취량, 열량 섭취에 대한 기여율과 영양의 질적 지수와의 관련성을 분석하였고, 그 결과는 다음과 같다. 연령 및 신체계측 사항(신장, 체중, 체질량지수 및 체지방율)은 남녀 모두에서 야식으로부터의 섭취 열량 비율에 따른 군간 유의한 차이를 보이지 않았다. 또한 흡연, 규칙적 운동 여부, 세끼 식사 횟수 및 식사시간의 경우, 남녀 모두에서 야식으로부터의 섭취 열량 비율에 군간 유의한 차이를 보이지 않았으며, 아침의 식욕 저하 및 불면증과 같이 야식으로 야기될 수 있는 임상 증상의 경우 남녀 모두에서 각각 35%와 10% 미만의 비율을 가지는 것으로 나타났으나, 야식으로부터의 섭취 열량 비율에 따른 군간 유의한 차이는 나타나지 않았다. 1일 섭취 열량의 경우 남성에서는 야식 비섭취군, 25% 미만 야식군 및 저녁식사 각각 1,517.67 kcal, 1,970.69 kcal, 2,353.68 kcal였으며, 여성에서 야식 비섭취군, 25% 미만 야식군 각각 1,768.95 kcal, 2,019.57 kcal로 야식을 섭취하는 군에서 유의적으로 높은 열량 섭취량을 보였다(p<0.001, p<0.05). 그러나 남성의 경우 섬유소, 비타민 $B_1$, 비타민 $B_2$, 엽산, 비타민 C, 칼슘, 칼륨 및 철 등 미량영양소의 섭취 밀도에서 세군 중 25% 이상 야식군이 유의적으로 낮게 나타났으며, 여성의 경우 25% 미만 야식군의 비타민 C 섭취 밀도가 야식 비섭취군에 비해 유의적으로 높게 나타났다. 또한 영양소별영양의 질적 지수를 분석한 결과, 남성에서 비타민 $B_1$, 비타민 $B_2$, 엽산, 비타민 C, 칼슘 및 철의 INQ에서 25% 이상 야식군이 세 군 중 유의적으로 가장 낮게 나타났으며, 여성에서는 25% 미만 야식군의 비타민 C INQ가 야식 비섭취군에 비해 유의적으로 높게 나타났다. 식품군별 섭취량 분석 결과, 남성에서 식품 섭취량은 야식 비섭취군, 25% 미만 야식군 및 25% 이상 야식군에서 각각 849.84 g, 1,138.91 g, 1,449.16g으로 25% 이상 야식군에서 유의적으로 가장 높게 나타났으며(p<0.001), 여성에서도 25% 미만 야식군의 1일 총 식품 섭취량은 1,280.97 g으로 야식 비섭취군의 1,034.98 g에 비해 유의적으로 높게 나타났다(p<0.01). 남성에서 육류, 유지류 및 음료류의 섭취량의 경우 25% 이상 야식군에서 유의적으로 가장 높게 나타났으며, 여성에서 25% 미만 야식군의 과일류 및 우유류의 섭취량이 야식 비섭취군에 비해 유의적으로 높게 나타났는데, 이는 야식으로부터의 식품군별 섭취량을 분석해 본 결과에서도 유사하게 나타났다. 또한 연구 대상자들의 야식으로부터의 식품 및 열량 섭취량, 열량 섭취에 대한 기여율과 영양의 질적 지수와의 관련성을 분석한 결과, 남성에서 비타민 $B_1$, 비타민 $B_2$, 비타민 C, 칼슘 및 철 INQ의 경우 야식으로부터의 식품 및 열량 섭취량, 열량 섭취에 대한 기여율에서 모두 유의적인 음의 상관성을 보였으며, 여성에서 비타민 $B_1$ INQ는 야식으로부터의 열량 섭취량 및 열량 섭취에 대한 기여율과 유의적인 음의 상관성을 보였다. 이와같은 결과를 종합해볼 때 본 연구 대상자인 남녀 대학생의 경우 야식으로 섭취하는 열량의 비율이 5.74%로 야식으로부터 섭취하는 열량의 비율이 높지 않은 것으로 나타났으나, 25% 이상 야식으로부터 열량을 섭취하는 남자 대학생의 경우 1일 절대적인 양적 식품 및 열량 섭취량은 다른 군에 비해 높고, 영양섭취기준을 충족하는 비율도 높았지만, 미량 영양소의 1,000 kcal당 섭취량이나 영양의 질적 지수는 낮게 나타나 미량 영양소의 섭취가 질적으로 낮을 가능성이 나타났다. 또한 야식으로부터의 식품 및 열량 섭취량, 열량 섭취에 대한 기여율도 미량영양소의 INQ와 유의적인 음의 상관성을 보여 야식의 섭취와 미량 영양소 섭취의 질과의 음의 관련성을 시사하여 주었다. 따라서 이와 같은 결과를 성인기 초반에 있는 대학생을 대상으로 한 건강 관련 적절한 식습관에 대한 영양 교육 시 고려해야 할 것으로 생각된다.

The purpose of the present study is to investigate the effects of green tea catechin on microsomal phospholipase $A_2(PLA_2)$ activity and the arachidonic acid (AA) cascade in hearts of microwave exposed rats. Sprague-Dawley male rats weighing $100{\pm}10$ g were randomly assigned to one normal group and three microwave exposed groups. The microwave exposed groups were subdivided into three groups: catechin free diet (MW) group, 0.25% catechin (MW-0.25C group and 0.5% catechin (MW-0.5C) group according to the levels of dietary catechin supplementation. Rats were sacrificed $6^{th}$ day after microwave irradiations (2.45 GHz, 15 min). The heart microsome $PLA_2$ activity in the MW group was 130% greater than that of normal groups, whereas there was no significant difference between normal group and MW-0.25C, MW-0.5C group. The per- centage phosphatidyl ethanolamine (PE) hydrolyzed in the heart microsome in the MW was increased 54% by microwave irra- diation, whereas there was no significant difference between normal group and MW-0.5C group. The percentage phosphatidyl choline (PC) hydrolyzed in the heart microsome in the MW group was increased by 104% and by microwave irradiation, whereas there was no significant difference between normal group and MW-0.5C group. The formation of thromboxane $A_2(TXA_2)$ in the heart microsome was 70% greater in the MW group than in the normal group. However, the MW-0.25C and MW-0.5C group maintained the normal level. The formation of prostacyclin ($PGI_2$) in the heart microsome was 21% lower in the MW group than in the normal group, while that of MW-0.25C and MW-0.5C group were maintained in the normal group. The heart microsomal thiobarbituric acid reactive substances (TBARS) concentrations, as an index of lipid peroxide, were 71% greater in the MW group, as compared with normal group. However, the MW-0.25C and MW-0.5C group were 4.6% and 9.2% lower, respectively, than that of MW group. In conclusion, heart function appeared to be improved by green tea catechin supplementation due to its antithrombus action, which in return controls the AA cascade system.

Omija, the major material of omigalsu, has liver protective and antioxidant effects, while mung bean has detoxification effects. A series of studies were conducted to standardize the traditional recipe for omigalsu to develop traditional functional drinks made from Omija extract and mung bean juice. Study 1 was designed to determine the optimal conditions for Omija extraction and mung bean juice. A higher water temperature and longer immersion time was associated with higher, free sugar and organic acid contents of omija extract; however, sensory evaluation revealed that the optimal extraction conditions for the highest acceptability, proper taste and red tone were $23^{\circ}C$ and 18 hrs of immersion. Conversely, the pH of the mung bean juice produced by varying the immersion time (5 hr, 11 hr, 17 hr) was found to be neutral, containing small levels of organic acid and free sugar, and showing a yellow tone. The results of the sensory evaluation also showed that the optimal conditions for taste, flavor and yellowness of mung bean juice was 5-hour-long immersion. Study 2 was designed to determine the optimum mixing ratio of omigalsu concentrate. Sensory evaluation revealed that the contents of sugar and total free sugar were highest when the mixing ratio among omija extract, mung bean juice and sugar was 1:1:20%, indicating that these conditions produced the most attractive color and highest overall acceptability. Study 3 was designed to determine the optimum dilution magnification for omigalsu. Sensory evaluation during summer revealed that the omigalsu produced by mixing 54 g of omigalsu concentrate into 200 cc water of $4^{\circ}C$ or $80^{\circ}C$ was most preferred, while during winter. Overall, the optimum dilution magnification for omigalsu was 4.7~5.4.

The aim of this study was to investigate the quality characteristics of makgeolli that was produced by using different percentages (control, 3%, 5%, 7%, 9% by rice weight) of Angelica gigas Nakai water extracts during fermentation at $25^{\circ}C$ for 7 days. Yeast cell count in makgeolli steadily increased and showed the highest value at day 4 of fermentation, since then, the count decreased consistently. The final alcohol contents were higher than 15% in all samples. Soluble contents and antioxidation activity were significantly increased in percentage as Angelica water extracts increased (p<0.05). As the amount of Angelica water extracts increased, total polyphenol contents increased as well. Soluble contents and total polyphenol contents were increased according to the fermentation period. Total acidity increased up to day 3, but slowly decreased afterwards. However, the pH rapidly decreased by day 3, but then increased steadily. Reducing sugar amount was increased sharply by day 2 of fermentation and then, diminished gradually. Hunter's color value was not significantly different among samples however, they were significantly different between day 2 samples of fermentation and day 3 or more samples (p<0.05). In sensory evaluations, the sample produced using 5% Angelica water extracts received the highest score in herbal flavor, herbal taste, sourness, sweetness, and overall acceptance. Makgeolli using Angelica gigas Nakai water extracts showed excellent characteristics in antioxidative activity and higher total polyphenol content. Makgeolli produced using 5% Angelica water extracts received the highest score in sensory evaluation. Therefore, makgeolli produced using 5% Angelica water extracts was considered to be the most suitable for manufacturing makgeolli.

The Rubus coreanus Miquel concentrate was added in 0 (control), 10, 20, 30, and 40% substitution ratios by weight per sugar. The specific gravity and water content in pound cake batter tended to increase specific gravity according to the added Rubus coreanus Miquel concentrate. The volume, weight, and specific loaf volume in pound cake tended to decrease by according to the addition Rubus coreanus Miquel concentrate. Moisture contents in pound cake tended to increase long the addition Rubus coreanus Miquel concentrate. Brix and pH also decreased. 'L' and 'b' along with the increase in 'a' values were followed in proportion to the substitution ratio. Typical textural parameters like hardness, gumminess, and chewiness were increased in proportion to the substitution ratios, but springiness decreased. Adhesiveness and cohesiveness did not show any considerable differences between the pound cakes. The sensory evaluation showed a high preference for pound cake made with 30% Rubus coreanus Miquel concentrate.

When making a yellow layer cake, an existing chemical leavening agent, sourdough starter powder, was used instead of using baking powder in order to produce batter where the acid agent in the baking powder was reduced using baking soda. The control group had the lowest share of the batter and therefore had the highest specific volume. In a test group, the share of SP4 was low and therefore, the specific volume was high. In terms of physiochemical characteristics, the volume, symmetry and uniform index was high in SP4 in the test group. The control group had the highest moisture content followed by SP4. In terms of texture, the control group had the lowest hardness and highest springiness. In the test group, SP4 had the lowest hardness and highest springiness. The result of the sensory evaluation indicates that SP4 had the best taste and flavor. In terms of overall preference, SP4 showed significantly higher preference overall. However, it did not show any significant difference compared to the control group.

The purpose of this study is to investigate the quality characteristics of choco-chip when using the baking soda. Medium flours are more commonly used for choco-chip cookies than cake flours due to the higher pH levels. The L and b values of the flours decreased but the redness colors were increased with the increased percentage of baking sodas. The hardness, brittleness and gumminess of cake flours and increased baking sodas were lower than the medium flours. Micrographs of the choco-chip cookies showed that the baking sodas with the medium flours had better tendency to melt the proteins than cake flours. Sensory characteristics suggested that the additional 2% of baking soda generated good appearance, flavor, color, texture and over all acceptance. According to the results, we gained knowledge on the effects of adding baking soda to the quality of cookies. And, the most recommended percentages of baking sodas base as suggested by bakers are 2%.

This study is performed to investigate the quality characteristics of sulgidduk added with cheonnyuncho fruit powder. Sulgidduk was prepared with freeze-dried cheonnyuncho, rice flour, sugar syrup and salt. The sulgidduk was made with various amounts (0, 3, 6, 9, 12%) of added cheonnyuncho fruit powder. The proximate composition, pH, Hunter's color value, texture profile analysis, sensory characteristics and SEM of cheonnyuncho sulgidduk were being examined. The addition of cheonnyuncho fruit powder has a tendency to decrease the moisture contents of sulgidduk while the crude ash, crude lipid and crude protein increased. The pH of sulgidduk decreased when the amounts of cheonnyuncho fruit powder increased. As the amount of cheonnyuncho fruit powder increased, the lightness (L) decreased, while the redness (a) and yellowness (b) increased. In texture profile analysis, the hardness decreased with increasing cheonnyuncho fruit powder contents, whereas cohesiveness, springiness, gumminess and brittleness increased. The results of sensory evaluation showed that the sulgidduk with 3%, 6% of cheonnyuncho fruit powder got the highest scores on the color, taste, springiness and acceptability. The air cells of sulgidduk observed by SEM were big and uniform with the amount of cheonnyuncho fruit powder increased. In conclusion, these results show that the quality and preference increased when 3%, 6% of cheonnyuncho fruit powder was added to the sulgidduk.

The purpose of this study was to analyze the antioxidant effects and antimicrobial activity of extracts from yacon powder. The total polyphenol contents of yacon powder extracted with methanol was 38.5 mg/g, while extracted with water was 24.0 mg/g. Extractions with methanol were therefore more effective than with water. The total flavonoid contents of yacon powder extracted with methanol was 9.2 mg/g, while that with water was 7.8 mg/g. The electron donating ability of yacon powder extracts, natural antioxidant, and artificial antioxidant at 1.0 mg/mL arranged in order of decreasing concentration were ascorbic acid (98.7%) > BHT (44.7%) > methanol extract (12.1%) > water extract (7.8%). Nitrite-scavenging ability of yacon powder extracted with methanol at pH 1.2 was 13.1%, while that of powder extracted with water at pH 1.2 was 6.8%. And, the hydroxyl radical scavenging activities of yacon powder with methanol at 5 mg/mL was 40.2%. The antimicrobial activity of yacon powder extracted with methanol could be detected on Bacillus cereus ($10,000{\mu}g/disc$) and Staphylococcus aureus ($10,000{\mu}g/disc$).

The purpose of this study is to provide the basic findings concerning a quality evaluation. The first conclusion is the coffee's $CO_2$ gas production between a roast brewed at 0 hour and 72 hours after grinding. The espresso, 48 hours after its grind, emits a small amount of $CO_2$ gas, whereas 72 hours after being grinded there is no discharge. In the sensory evaluation, the overall preference is the 72 hours later grind, in accordance to the decrease of the bitter, acid, and sour taste with the increase of the sweet, nutty, and chocolaty flavors. The foam index indicates a significant reduction between the roasts brewed at 0 hour and 72 hours after grinding. A persistence of crema in the Colombian Colombia and Ethiopian Yirgacheffe decline for the 72 hours after its grind coffee. The Tanzanian Kilimanjaro and Brazilian Cerrado roasts show no difference. The pH is decreased in the 72 hours after its grind roast. Moreover, sugar contents in the Colombian Excelso and Brazilian Cerrado are increased, whereas the Tanzanian Kilimanjaro sugar contents are decreased, along with its density.