A study for the dangerous properties measurment of dust explosion was attended by the various dust concentration on Anthraquinone, Sodiumbenzoic acid, Corn starch, soy sauce powder, and cheese powder. As the result, maximum explosion pressure, the maximum rate of pressure rise, autoigntion temperature, and the water content of dust on lower limit explosion concentration was obtained as follows 1. The lower limit explosion concentration on soy sauce powder with the humidity of 65 to 90% increased by increasing the con tent of moisture, and the effect of dry air and moisture air decreased better in make of dry air. 2. The effect of a various dust concentration on autoigntion temperatures is investigated, If the vessel of dust explosion is small size and the easiness of autoignition was controled by air within the vessel, because it was better decreased air with increasing of dust concentration 3. The maximum explosion pressures of Anthraguinone, sodiumbenzoic acid, com starch, soy sauce powder, and cheese powder were 1.0g/l, 1.0g/l, 1.5g/l, 1.5g/l, and 1.5g/l, respectively, and the maximum rate of pressure rise were 0.5g/l, 0.5g/l, 1.0g/l, 1.0g/l, and 1.0g/l, respectively.

The main purposes of this study are to know the contents and forms of impressions that the general public, and the consumerists and environmentalists have of irradiated food, and to know what information of irradiated food influences their impressions. Other purposes are to know what sources those impressions derive from, to know which media they have recently been exposed to and paid attention to irradiated food through, to know which sources they trust of information regarding irradiated food most greatly, and finally to suggest policies and strategies of communication in order to shed positive impressions of irradiated food on people. This study was conducted through the person-to-person interview survey toward 1,200 adults, and 150 consumerists and environmentalists in 1999. Adults are sampled nationally in South Korea. Only 8.7% of the general public have heard of irradiated food. Impressions of irradiated food that the general public mentioned most frequently are: harmful, insecure, negative, etc. The consumerists and environmentalists were found to have the most inaccurate knowledge of irradiated food. Television and newspaper were the major sources of impressions of, exposure to and focus of attention on irradiated food. Based on these results, we seem to devise methods to enhance impression of irradiated food by disseminating information of advantages and benefits that irradiation provides food with and to promote the fact that irradiation on food is totally irrelevant to being radioactive, danger of a nuclear power plant, genetically modifying food, etc.

Following the recent policy, enlargement of foodservice and contracted management systems of high school foodservices have been accelerated, and the scales of foodservices have been gradually increased. A sudden growth of domestic foodservice companies have remarkably disparated. Yet compared to that of the foodservice control in advanced countries, domestic foodservice control has a lot more to learn. Due to the characteristics of foodservice establishment serving many people at a time, there is always a high potential of food borne outbreak. The purpose of this study was to evaluate hazard factors in the steps of production, holding and assembly and service of fried curry hair-tail, cold seaweed and cucumber, fried pork cutlet, that were served by contracted management in high school foodservice centre, then to suggest method of control with the Hazard Analysis Critical Control Point(HACCP) program. Also we suggested the possibility that the contracted management of foodservice system can be established and utilized to identify the variation of holding temperature among foods up to 6 hours after cooking. The results are as follows; The hazard factors in food product had come from the temperature, time, pH, Aw, equipment and utensils. The critical control point(CCP) of each food product; curry hair-tail, cold seaweed and cucumber and pork cutlet was cooked and held before serving, prepared and held before serving, cooked and held before serving, and prepared, cooked and held before serving, respectively.

This study was undertaken to investigate meal pattern, nutrition knowledge and food preference of 438 rural middle school students living in ChunNam area. As far as nutrition knowledge is concerned, most subjects did not answer correctly on the items of basic five food groups, animal fat and vegetable oil, empty source of soft drink, nutrient requirement and water's role in energy metabolism. However they responded well on the item of iron deficiency and dietary source of Ca. Male students were significantly better in the answering the items of dietary source of energy and nutrient requirement than females, while female students were significantly better on the items of water's role in energy metabolism related to obesity. Generally the respondents did neither consume oil often nor consider consumption of salty food. Furthermore, only 38.6% of subjects drink milk daily in spite of understanding dietary source of Ca, which suggested that they should incorporate nutrition knowledge into dietary behavior. The preferred foods for most subjects were fruit, kimbab and ice cream. Contrastingly the food that they did not prefer was fermented vegetable probably due to strong flavor.

This study was designed to evaluate food habits, anthropometry and obesity of 252 children(136 boys, 116 girls) aged 2~6 years old. The anthropometric indices were measured and food habits were surveyed. Average food habit score was 11.7/20.0 in boys and 11.8/20.0 in girls. It was found that 60.3% of the subjects belonged to fair score group(7-13) in food habits, while subjects in poor (0-6) and in excellent (14-20) were 30.6% and 9.1% respectively. There was no significant difference in food habits score between boys and girls. The food habits score tended to be higher as the mother's education level, total family income, number of siblings were increased. The mean height, weight and chest circumference of the subjects were much higher than the Korean standards. Evaluating the obesity by weight for height, 77.8% subjects was normal, 4.0% was underweight and 18.3% was obese. Underweight children did not seem to enjoy their meals and ate too slowly compared to normal or obese children. Therefore they needed to promote food habits by good nutritional education.

The purpose of this study was to investigate several aspects of eating out behavior especially in relation to food waste. The data were collected from 620 housewives in Jeonbuk area but, except for 134 case not eating out . The 66.9% of subjects ate eating out 1 to 2 times monthly. The younger in age, higher in education level and employed housewives, higher in monthly income have a more increase in eating out frequency. In the 50.8% of subjects food rest was rare when eating out. The higher in educational level and higher in monthly income have an inclination to more food waste. The 51.4% of subjects don't know [Good Menu System]. We housewives should order a planned and moderate food amount when eating out, and make an effort normally anywhere for the reduction of food waste, and then the wasted food and food rubbish will be reduced. Besides this, the restaurants should practice [Food Bank] & [Good Menu System] and the academic world should make further researches on this field. Moreover the government administration should enlighten the people and have a public information for the more reasonable food culture.

부산지역 대학생 340명을 대상으로 패스트푸드점 이용실태를 조사한 결과 다음과 같다. 1. 조사 대상자는 남학생 56.2%, 여학생이 43.8%이었고, 20-24세가 66.8%를 차지하였고, 자기집에 거주하는 학생이 73.6%이었으며. 평균용돈은 16-20만원이 31.8%로 가장 많은 비율을 차지하였다. 2. 대상자 중 패스트푸드점을 이용하는 대학생이 83.3%로 남학생이 77.6%, 여학생이 90.3%, 19세이하가 88.1%를 차지하였으며, 자기집에 거주하는 학생이 87.7%, 월평균용돈의 액수에 상관없이 높은 비율의 학생이 이용하고 있었다. 3. 패스트푸드점을 이용하는 시간대는 아무 때나가 44.7%로 가장 많았으며, 저녁시간, 점심시간 순으로 남학생은 아무 때나, 저녁시간대가 많았고, 여학생은 모든 시간대에 비슷한 비율로 높았다. 또한 자기집에 거주하는 학생이 아무 때나, 저녁시간대 이용하는 비율이 높았다. 4. 1회 이용시 평균비용은 삼천원대가 가장 많았는데 남학생은 삼천원이상 비용대의 비율이 높았고 여학생은 삼천원 비용대에서 두드러지게 그 비율이 높았다. 또 연령이 높을수록 비용이 많이 들었고, 자취와 하숙생이 삼천원 이상의 비용을 이용하는 비율이 높았으며, 평균용돈이 많을수록 삼천원 이상의 비용대의 비율이 상대적으로 높았다. 5. 패스트푸드점 이용시 메뉴선택은 기호에 따라 선택하는 비율이 64.5%로 가장 높았고, 남학생에 비해 여학생이 기호에 따라 선택한다는 비율이 80.1%로 높았다. 6. 대학생들이 이용하는 패스트푸드점은 맥도널드이었으며 특히 남학생보다 여학생이 상대적으로 월등히 높게 나타났다. 연령이 낮을수록 맥도널드, 롯데리아 등을 많이 이용하였고, 나이가 많을수록 다른 패스트푸드점도 이용하는 것으로 나타났다. 이와같은 결과로 볼때 대학생들의 패스트푸드점 이용은 점점 증가하고 있고, 소비하는 비용도 많아져 가고 있어 젊은이들의 식습관에 문제가 되리라 사료된다. 그러므로 패스트푸드의 영양성을 고려한 메뉴개발 등의 노력이 필요하며 미래의 주역이 될 대학생들의 식습관에 대한 보다 심도있는 연구가 함께 병행되어야 할 것으로 생각된다.

A survey was conducted to examine the effect of food irradiation education on college students' knowledge and acceptance of food irradiation. The instrument for the knowledge and acceptance of food irradiation was administered before and after food irradiation education, to 150 students majoring in food and nutrition or food technology in the Chungnam National University. Before the education approximately 93% of the respondents did not know that radioactivity dose not remain in food after irradiation; whereas, after education half of them thought that radioactivity dose not remain in irradiated food. Knowledge about food irradiation has improved through education. The education significantly increased all the mean scores of need for food irradiation and willingness to use irradiated foods for the six food groups (p<0.01). The education significantly decreased the mean scores of concern about the irradiated food for all the six food groups (p<0.01). Although the responses to irradiated foods are, in general, negative or neutral even after education, the mean scores of acceptance of the irradiated foods have improved through education in all the six food groups (p<0.01). In conclusion, this study showed that food irradiation education may positively affect the college students' knowledge and acceptance of food irradiation, and that the development of both the appropriate detection methods to identify irradiated foods and the education programs to enlighten the college students are needed.

A survey was conducted to examine the knowledge and acceptance of food irradiation in order to provide baseline data required in the development of food irradiation education programs for college students. 150 students majoring in food and nutrition or food technology in the Chungnam National University were chosen for a survey. The results are as follows. First, college students' knowledge about food irradiation is scanty. Knowledge assessment showed that 56% of the participants had previously heard of food irradiation. 68% of the respondents thought that radioactivity remains in food after irradiation and 25.3% of them were not sure whether radioactivity remains in food after irradiation or not. Only half of the respondents thought that nutrient loss due to irradiation is equal to or lower than that due to cooking or freezing. Second, approximately 56% of the respondents showed that food irradiation is somewhat or strongly needed for meat or fish; whereas, over 60% of them showed that food irradiation is not needed for grain, vegetable and fruit. Almost 40% of the respondents were seriously concerned about irradiation of vegetables and fruits; whereas, they showed less concern about spice irradiation. More than half of the respondents were not willing to use irradiated food in all the six food groups. Third, the correlation analysis showed that the need of food irradiation is negatively correlated with concerning about the irradiated fish and fruits, but positively correlated with willingness to use irradiated food in all the five food groups, except in spices. Concern about the irradiated food is negatively correlated with willingness to use irradiated food from all the six food groups. Fourth, almost all the respondents (over 90%) agreed that the irradiated food labeling is required as well as the development of proper methods to identify irradiated foods.

The purpose of this study was to describe the levels of market goods substitution of housework and find out the determinants on it in the domain of food among married female home-based workers. The data were collected from 169 married female home-based workers in Pusan and Kyungnam province, by self-administered questionnaires. Frequencies, percentiles, Cronbach's alpha, Pearson's correlations, and multiple regression were used to analyze the data. In the convenience foods, frozen foods had the highest substitution level, whereas prepared stew had the lowest. The substitution level of Korean traditional storage foods was the middle. And in dining-out service, the substitution level was mostly high: the level of delivery service was higher than that of dining-out. Compared to the previous research, these results showed that market goods substitution tended to increase, and its level in the domain of food will promote continually over time. The variables affecting the substitution level of convenience food were the number of family members, occupation, the existence of elderly/disabled person in the family, sex-role attitude, and weekly hours at home-based work. The substitution level of Korean traditional storage foods was influenced by sex-role attitude, occupation, education, monthly household income, and the existence of elderly/disabled person in the family. The significant variables affecting the substitution level of dining-out service were weekly hours at home-based work, the number of family members, occupation, monthly household income, education, and sex-role attitude.

The contamination levels of food poisoning bacteria was investigated from 350 samples of beef, 338 samples of pork, and 350 samples of chicken during the period from March 1996 to October 1998. The contamination levels of pathogenic organisms were higher in refrigerated meat than packed frozen meat and were relatively higher in chicken and packed meat than in beef. The highest level detected for each of the various pathogens was : less than 10,000 cfu/g for Staphylococcus aureus : less than 0.9 MPN/g for Salmonella and Literia monocytogenes: 7MPN/g for Campylobacter jejuni /coli. In the comparisions of cross- contamination ratio of tested meat for four species food poisoning bacteria 14.3% of beef, 23.5% of pork and 55.0% of chicken were contained only one species of pathogen, whereas 2.7 of beef, 5.6% of pork and 14.7% of chicken contained two species and 2.3% of pork contained a total of three species. Generally, pathogens was encounted higher isolation freguency in packed frozen chicken meat than in chilled chickens.

Daily intakes of 14 preservatives were evaluated by using their maximum permitted levels(MPL) and national food disappearance data in 1998. The estimated daily intake (EDI) of each preservatives were compared with corresponding acceptable daily intakes (ADIs). EDIs of dehydroacetic acid, sodium dehydroacetate, p-hydrobenzoic acid ester, propionic acid, sodium propionate and calcium propionate were leas than 2% of ADI and judged to be safe. However, EDI of sorbic acid and potassium sorbate were 76.61 mg/person/day and it reached 5% of its ADI. EDI of benzoic acid and sodium benzoate were 85.65 mg/person/day and it reached 31% of its ADI. The highest intake of benzoic acid came from carbonated drink.

This experiment was carried out to investigate the effects of application levels of food waste compost andmineral nitrogen in 3 cuttings per annurn on the nutritive value and nutrient yields of orchardgrass (Dactylisglomerata L.). Annual food waste compos