This study aims to understand college students customer’s preference and the difference of coffee grade by comparing the result of Q-grader, who was trained professionally and received certification for a sensory evaluation of coffee grade. The results of the chemical analysis of raw coffee and coffee berry show that those of specialty grade had slightly higher, but not significant, water content. Further, the pH of specialty grade coffee was high in coffee beans and after roasting, the commercial grade became high. There was no significant difference between the specialty degree and commercial degree in color before and after roasting. In this study, the panels for the sensory evaluation included 24 university students. The preference of evaluation items of sensory evaluation consist of aroma, acidity, bitterness, astringency, aftertaste, and overall satisfaction. Items for the strength evaluation consist of aroma, acidity and bitterness. The sensory evaluation was expressed by applying a 5 point Likert scale (1: extremely low∼5: extremely high). In the sensory evaluation, it was evaluated that specialty grade coffee had strong acidity and commercial grade coffee was strongly bitter. The result of the sensory evaluation shows that female students are sensitive to coffee taste. In the analysis of frequent visit to coffee shop, the not-frequently-use-group rated that specialty grade coffee with higher overall satisfaction than commercial grade coffee in factors such as aroma and acidity. The group which did not prefer Americano coffee rated that specialty grade was higher than commercial grade in all factors except aroma, of which the result is similar to the cupping test.

This study was done to provide basic information about the storage and distribution of specialty grade coffee of which the market will be expanded through customer sensory evaluation according to the storage period of specialty grade coffee by the SCAA classified method with consideration to defective beans and scent. The specialty grade coffee sample of this study was extracted on day 1, day 14, and day 28. The water content showed a significant reduction on the 28th storage day and there was no pH change according to the storage period. Color degree was brightened according to the preservation period before and after grinding but there was no significant difference. The panels for sensory evaluation considered of 24 university. The sensory evaluation consist of aroma, bitterness, and astringency, acidity, aftertaste, overall satisfaction, and items for strength estimation consist of aroma, acidity and bitterness. The sensory evaluation was expressed by applying a 5 point Likert scale. The results showed that as the storage period increased so too did the aroma and the strength of bitterness. Preference was the highest on day 1 in every items except aroma and astrigency. However on day 14 and day 28, most of the sensory evaluation became low and then became high, which was inconsistent. Male students were not consistent in their evaluation according to the preservation period, but female students rated aroma and bitterness the lowest on preservation period day 1 and they prefer after a storage period of 1 day in regards to the entire degree of satisfaction including sour test. astrigency and aftertaste. The analysis of visiting frequency for coffee shops used demonstrated that the longer the preservation period, the lower the preference but was not significant in the case of involving a little frequency group. The group that did not like Americano coffee evaluated that the longer the preservation period, the lower the preference based on Americano coffee preference analysis. There was no consistency between the storage period day 14 and day 28 in strength and preference, but preference for storage period day 1 was high in every group, which means that the quality of coffee is affected by the preservation period.

Using green tea(GT), oolong tea(OT), black tea(BT) and green tea bag(GTB) out of tea products in market, this study quantified polyphenol and catechins as anti-oxidant substances and analyzed their respective anti-oxidant capacities. As a result, more epigallocathechin(EGC) was found in GT and GTB as well as caffein(CAF) in GT and BT. GT contained more epigallocathechin gallate(EGCG) than other tea types. Both FRAP and ORAC, as two methods of analyzing anti-oxidant capacities, showed that GTB had highest anti-oxidant capacities, while OT had lowest of all. By brand, it was found that all the 3 brands of GT had similarly high anti-oxidant capacities, but there were differences in the anti-oxidant activities of GTB and BT depending on brand. Out of catechin components, it was found that epicatechin(EC), epicathechin gallate(ECG) and EGCG were major components affecting anti-oxidant capacities.

The purpose of this study was to investigate the preference on Korean food and the nutritional knowledge of the college students. Self-administrated questionnaires were completed by 556 college students majoring food-related subjects in Kangwon-do area. The results were as fellows : 1. Male subjects liked meat (Calbi, Bulgogi, Seolungtang) and female subjects liked Kimchi and soybean soup. Both genders, however, disliked seasoned vegetables. 2. In the frequency of taking, Kimchi had the highest rank followed by Bibimbab and Seolungtang in higher order. 3. The first choice of both family and friends eating out was Korean foods. 4. The top two reasons for selecting Korean foods were their deliciousness and availability in higher order. 5. According to this study, the establishment of standardized recipe and the different way of facing Korean foods of individuals (Koreans) are promptly required for the globalization of Korean foods. 6. The nutritional knowledge of the subjects were limited and restricted to simple facts regardless of their major.

This study was carried out in order to investigate effective aroma components of Korean traditional soy sauce. Volatile aroma compounds were extracted by solvent extraction, TMS esterification of methyl acetate extracts and SDE, and analyzed by GC/MSD. 140 voltile aroma compounds were detected by three different extraction methods. Most abundant volatile compounds were acids and phenols and identified aldehydes, hydrocarbons, ketones, furans, furanone, alcohols, esters, nitrogen compounds, sulfur compounds and thiazoles, too. In the analytical sensory evaluation of soy sauce aroma, there were significant differences between each soy sauce sample in all test item. To sum up, Sweet odor was high in Kyupjang. Nutty odor and traditional soy sauce odor were similarly high in Kyupjang and high concentration soy sauce. Kyupjang had high score in overall odor preference than Chungiangs. The result of multiple regression of soy sauce odor characteristics and gas chromatography pattern demonstrated that offensive and sour odor was affected by octadecanoic acid. Contributive compounds to sweet odor were 1,2-benzenedicarboxylic acid and 3,6-dioxa-2,7-disilacotane. Benzoic acid 4-methyl ethyl ester and nonacotane were identified as major compounds of nutty odor. Contribu live variables of traditional soy sauce odor were benzoic acid 4-methyl ethyl ester and 9,12-octadecadienoic acid. The main factors of odor preference were 3-methyl pentanoic acid, acetic acid, 2,6-dimethyl heptadecane and 3,6-dioxa-2,7-disilacotane.

This study was carried out in order to investigate general characteristics, sugars and organic acids contents of Korean traditional soy sauce, and to find out possibility of high quality soy sauce production in a short period through high concentration soy sauce making. In this study, we prepared three different types of soy sauce, low concentration soy sauce (Chungjang), high concentration soy sauce and Kyupjang, high quality traditional Korean soy sauce. pH of soy sauce were 4.46~4.90 and did not show difference among three samples. Titratable acidity, buffering power and total free acid content were the highest value in Kyupjang. Kyupjang showed the highest contents of salt and pure extract. As the ripening period increased, the salt content increased in Chungjang samples, but decreased in Kyupjang. Reducing sugar contents of Kyupjang, high concentration soy sauce and low concentration soy sauce were 1.13%, 0.76% and 0.53%, respectively. Free sugar in soy sauce were analyzed maltose, glucose, galactose and fructose. Total free sugar content was highest in high concentration soy sauce, however, contents of glucose and fructose were higher in Kyupjang than in Chungjang samples. Galactose was the main free sugar in Chungjang, but glucose was in Kyupjang. Among identified volatile organic acid, acetic acid was present in the highest concentration, and volatile organic acid content was highest in the high concentration soy sauce at 150 days. 20 nonvolatile organic acids were detected in Korean traditional soy sauce. Succinic acid, lactic acid and 2,5-pyridine dicarboxylic acid were the main nonvolatile organic acid in soy sauce.

Infanthood is a crucial period when mental and emotional developments take place along with physical growth. Adequate supply of nutrition is essential during this period and there is an urgent need for proper education and guidance on balanced nutrition. Therefore, this study tried to set the direction for developing baby food by investigating the conditions of weaning status and mothers perspectives on weaning. According to the result of this study, the average period when interviewees began weaning of their infants is 4.1 months and finishing period of weaning is 14.2 months on average. The frequency of consuming commercial weaning food is once a week. As high as 88.4% and the fruit juice was mainly used as the starting weaning food. The consumtion rate, more than once a day, is as high as 60%, they use commercial weaning food for convenience, especially when they are out. The 65% of surveyed group show rather dissatisfactory view about the commercial weaning food, and wanted improvements and changes. Interviewees wanted to obtain the information on baby food sold in the market and how to prepare baby food through technical literatures, and they frequently relied on commercial baby food due to its convenience. The most desired type of baby food was semi-solid paste in a disposable package that can be stored at room temperature.

본 연구에서는 한국 전통 간장의 담금용기를 달리하였을 때와 메주의 농도를 상법보다 높게 하였을 때의 질소성분 함량과 향기성분을 분석하고 향미의 관능검사를 실시한 후 향기성분 패턴과의 통계적 해석을 통해 어떠한 성분이 간장의 관능 특성에 영향을 주는지 알아보았다. 본 연구에서 얻은 결과들을 요약하면 다음과 같다. 1. 간장의 맛에 가장 큰 영향을 미치는 요인으로 평가되고 있는 질소성분의 함량에서, 총질소의 경우는 메주의 농도와 상관없이 유리병이 항아리보다 높았으며 메주의 농도가 높은 경우 많은 양을 함유하는 것으로 나타났다. 그러나 유리병은 항아리보다 적은 양의 amino태 질소와 더 많은 양의 ammonia태 질소를 함유하고 있어 질적인 면에서 떨어지는 것으로 나타났다. 2. 유리아미노산의 함량을 조사한 결과, 총유리미노산의 함량은 150일 이후 최고치를 보였다. 지미와 감미를 내는 glutamic acid, aspartic acid, serine, alanine, Iysine의 함량이 높게 나타났고, 쓴맛에 관여하는 valine, phenylaalanine, leucine, isoleucine의 함량도 높게 나타났다. 3. 휘발성 유기산으로는 acetic acid가 가장 많이 함유되어 있는 것으로 나타났고 항아리가 유리병보다 함량이 높았으며 메주농도 1 : 4는 완만한 증가를 보이나 1.3 : 4는 숙성기간 150일에 급격한 증가를 나타냈다. 고린내의 주요성분으로 알려져 있는 butyric acid는 유리병 1 : 4와 항아리 1.3 : 4가 비슷한 경향을 보였으며 유리병 1.3:4에서는 급격하게 감소하였다. 그러나 모든 군에서 숙성기간이 경과할수록 감소하는 일정한 경향을 보였다. 이 외에 valeric acid와 capric acid가 소량씩 함유되어 있는 것으로 나타났다.