• 핵의학기술
• /
• 제17권1호
• /
• pp.3-6
• /
• 2013

Purpose: The treatment of thyroid cancer patients was continuously increased. According to the increment of thyroid cancer patients, the establishment of iodine therapy site was also increased in each hospital. This treatment involves the administration of radioactive iodine, which will be given in the form of a capsule. Therefore, protections and managements for radioactive source pollution and radiation exposure should be necessary for radiation safety. Among the many problems, the problem of disposing the radioactive wastes was occurred. In this study, The date for self-disposal for radioactive wastes, which were contaminated in clothes, bedclothes and trash, were calculated. Materials and Methods: The number of iodine therapy ward was 15 in Korea Institute of Radiological Medical and Sciences. Recently, 8 therapy wards were operated for iodine therapy patients and others were on standby for emergency treatment ward of any radiation accidents. Radioactive wastes, which were occurred in therapy ward, were clothes, bedclothes, bath cover for patients washing water and food and drink which was leftover by patients. Each sample was hold into the marinelli beaker (clothes, bedclothes, bath covers) and 90 ml beaker (food, drink, and washing water). The activities of collected samples were measured by HpGe MCA device (Multi Channel Analysis, CANBERRA, USA) Results: The storage period for the each kind of radioactive wastes was calculated by equation of storage periods based on the measurement outcomes. The average storage period was 60 days for the case of clothes, and the maximum storage period was 93 days for patient bottoms. The average storage period and the maximum storage period for the trash were 69 days and 97 days, respectively. The leftover foods and drinks had short storage period (the average storage period was 25 days and maximum storage period was 39 days), compared with other wastes. Conclusion: The proper storage period for disposing the radioactive waste (clothes, bedclothes and bath cover) was 100 days by the regulation on self-disposal of radioactive waste. In addition, the storage period for disposing the liquid radioactive waste was 120 days. The current regulation for radioactive waste self-disposing was not suitable for the circumstances of each radioactive therapy facility. Therefore, it was necessary to reduce the leftover food and drinks by adequate table setting for patients, and improve the process and regulation for disposing the short-half life radioactive wastes.

• Journal of Nutrition and Health
• /
• 제29권1호
• /
• pp.9-21
• /
• 1996

This study was carried out to evaluate the fatty acid intakes of employees in employee feeding operations in Seoul and to provide prudent dietary guidelines with special concern on dietary fat. Four establishments were selected in large scale group and other four were selected as small scale group according to feeding numbers and food cost. Food intake was measured by substracting the leftover from the averaged portion amount. The leftover was measured by the modified aggregate selection plate waste measurement technique. The results were as follows : Employees from the large scale institution consumed more energy, protein, carbohydrate and niacin compared to those from the small scale institution(p<0.05). The mean calorie compositions of carbohydrate, protein and fat of all subjects were 66.7, 16.4 and 16.9%. The mean fat intake was 12.1g/lunch. Linoleic acid(C18:2 $\omega$6, 3.67g) was the most abundant fatty acid contained in the diet, followed by oleic acid (C18:1 $\omega$9, 3.53g) and palmitic acid(C16:0, 1.83g). The subjects consumed 5.2g polyunsaturated fatty acids(PUFA), 4.6g monounsaturated fatty acid(MUFA), 3.2g saturated fatty acid(SFA) per lunch per person. The average ratios of P/M/S and $\omega$6/$\omega$3 fatty acids were 1.6/1.5/1.0 and 8.5/1/0., respectively. the dietary $\omega$3 fatty acid status can be improved, even though the ratios found belong to the desirable range, by including $\omega$3 fatty acid rich-foods such as bean products and seafoods more frequently in the diet. Caution is needed for higher unsaturated nature of $\omega$3 series fatty acids to be prevented from peroxidation.

• 대한영양사협회학술지
• /
• 제12권3호
• /
• pp.299-306
• /
• 2006

The purpose of this study was to analyze effect of nutrition education after executing education nutrition with the nutrition education textbook, reconstructed 12 units, focused on older elementary school children and to evaluate interest and understanding of textbook. The subjects were 4th grade children. The results were as follows. The most interesting lesson contents was 'obesity(16.3%)', and the next were 'food poisoning' (13.3%), 'kimchi'(13.3%), and 'Korean table manners'(10.2%) in the 12 unit. Children who attended education nutrition answered 'interesting'(94.1%), 'understand easily'(97.1%) about the developed textbook. With regard to change in nutrition knowledge after education, the percentage of correct answers was increased in most of question except 'reason of snack' and 'weight-control'. And the total score of nutrition knowledge was risen(p<0.01), because the ratio of correct answer of 'importance of breakfast'(p<0.05) and 'nutrition labeling'(p<0.01) was improved especially. The ratio of desirable snack time 'between lunch and dinner' was higher after education(91.2%) than before(55.2%)(p<0.01). After education, the choice of 'Fruit and vegetable' of which desirable snack food was increased. Both the choice of 'bread' and 'fast food', a factor of oversupply calorie, was decreased. And after education, the percentage of sound snack place 'home' was improved. In regard of a meal environment, the percentage of 'every wash hand before eating' is 65.1% and there is scarcely change after education. Before education, children answered 'use it rightly'(82.4%) about 'how to eat with spoon and chopsticks', but it is lower after education. The ratio of 'leave food sometimes or always' is 47.1% before education, and the ratio of leftover food tend to decreased in school lunch. Relate to reason of leftover, the percentage of 'because of hate food' tend to decrease. This results suggests that the activity-centered nutrition education can help to change food behaviors and increase nutrition knowledge level of school children.

• Journal of Magnetics
• /
• 제20권2호
• /
• pp.97-102
• /
• 2015

The waste of sintered Nd-Fe-B magnets was recycled using the method of dopingPrNd nanoparticles. The effect of PrNd nanoparticle doping on the magnetic properties of the regenerated magnets has been studied. As the content of the PrNd nanoparticles increases, the coercivity increases monotonically, whereas both the remanence and the maximum energy products reach the maximum values for 4 wt% PrNd doping. Microstructural observation reveals that the appropriate addition of PrNd nanoparticles improves the magnetic properties and refines the grain. Domain investigation shows that the self-pinning effect of the rare earth (Re)-rich phase is enhanced by PrNd nano-particle doping. Compared to the magnet with 4 wt% PrNd alloy prepared using the dual-alloy method, the regenerated magnet doped with the same number of PrNd nanoparticles exhibits better magnetic properties and a more homogeneous microstructure. Therefore, it is concluded that PrNd nanoparticle doping is an efficient method for recycling the leftover scraps of Nd-Fe-B magnets.

• 대한지역사회영양학회지
• /
• 제24권3호
• /
• pp.208-222
• /
• 2019

Objectives: This study examined the usage status and the degree of satisfaction of university foodservice (UF) perceived by international students in Busan. Methods: A questionnaire survey was conducted on the utilization of UF, improvement requirements, preference type and recipe, as well as the importance and satisfaction of UF quality attributes as perceived by international students (n=604) at universities in the Busan area between April and June 2017. Results: UF was 'generally satisfied' or 'very satisfied' in about 35.4% of the study population, and 'not very satisfied' or 'not satisfied at all' in approximately 11.5%. Approximately 21.7% said that UF contributed to dietary life 'very much' or 'quite significantly' and 36.4% said 'not very much' or 'not at all'. The largest demand for improvement of UF was 'variety of menu' (52.0%). The most leftover food in UF was kimchi (30.3%) and broth/stew (19.2%), and the major reason for having leftover was 'not to one's taste' (27.8%). After dividing the foodservice quality attributes into 5 factors - food quality and price, sanitation, convenience, physical environment, and service environment - and analyzing the importance and satisfaction of each factor, it was shown that satisfaction was generally lower than the degree of importance. Sanitation factor was high for both importance and satisfaction of UF, while convenience factor was high for the importance but low for satisfaction of UF. Four variables in the food quality and price factor ('food taste', 'freshness of food', 'nutritive value of food', and 'reasonable price') and 3 variables in the convenience factor ('variety of menu', 'prompt food service', and 'display of the meals for the day') had high importance but low satisfaction, showing the need for an improvement on these areas. Conclusions: Based on the study results, it is necessary to improve the food quality, as well as the price and convenience factors, and to provide various menus to increase the satisfaction of UF in international students.

• 한국식품조리과학회지
• /
• 제18권6호
• /
• pp.579-585
• /
• 2002

A survey on the school foodservice was conducted from 693 middle school students to examine their degree of satisfaction on foodservice with the object to enhance the quality of school foodservice in Gwangiu and Chonnam area. The degree of satisfaction with school foodservice ranked high in taste, temperature and service categories. There were notable differences in the satisfaction level by the gender of the students. Male students ranked higher than female students in taste, temperature and the sanitary condition of food containers. According to grades, first grade students ranked the highest in satisfaction of food selection, temperature, services and cafeteria. Regarding the amount of left-overs, soup and pot-stew were the greatest followed by side dishes. Reasons for leftover food were listed as being tasteless, having no appetite, or large serving size. The items of priorities on school foodservice were revealed as sanitary conditions, taste and variety in menu selection by the students.

• 농업과학연구
• /
• 제11권1호
• /
• pp.45-52
• /
• 1984

Changes of chemical componts and populations of total bacteria and lactic acid bacteria were examined during a month-long storage of sweet potatoes crushed and sealed up with polyethylene film at $7-8^{\circ}C$. 1. Changes of starch, total protein, volatile acid and ammonia-nitrogen contents were li 2. In a three days, pH down and increase of non-volatile acid content were notable, populations of total bacteria and lactic acid bacteria were maximum. 3. Vitamic C and soluble sugar contents tended to be reduced during the storage and the leftover were 75-85% and 41-45% respectively. 4. ${\beta}$-Amylase activity decreased gradually and vanished 15-30days. 5. Variations of chemical compontents of the samples inoculated lactic acid bacteria were larger than non- treated to some extent. 6. As above results, mainly homo lactic acid fermentation was done in this storage condition.

• 한국식생활문화학회지
• /
• 제12권4호
• /
• pp.411-417
• /
• 1997

A survey of 28 school foodservice establishments in Seoul and Kangnung was undertaken and detailed information was collected from 3,590 elementary school students. Childrert's satisfaction with the quality of school food was evaluated by questionnaires. It was measured by assessing 15 variables. Statistical data analysis was using SAS package program for descriptive analysis and T-test. Elementary schools in Seoul were all located in urban areas, whereas elementary schools in Kangnung were in urban areas (40.4%), provincial areas (40.0%) and in isolated areas (20.0%). Children seemed to be generally satisfied with the food served, with the lowest score of milk. Mean wastes for soups and Kimchi were found to be larger than those for milk and side dishes. The major reasons for leaving leftover were 'dislike the food (27.4%)'>'too big portion size (23.6%)'>'food is not tasty (19.2%)'>'low appetite (17.6%)'>'food is too overcooked or undercooked (3.9%)'>'food is not hot enough (3.2%)' in order.

• Biotechnology and Bioprocess Engineering:BBE
• /
• 제8권3호
• /
• pp.205-209
• /
• 2003

Solubilization of domestic household waste through Steam explosion with Subsequent ethanol production by the microbial saccharifitation and fermentation of the exploded product was studied. The effects of steam explosion on the changes of the density, viscosity, pH, and amounts of extractive components in artificial household waste were determined. The composition of artificial waste used was similar to leftover waste discharged from a typical home in Japan. Consecutive microbial saccharification and fermentation, and simultaneous microbial saccharification and fermentation of the Steam-exploded product were attempted using Aspergillus awamori, Trichoderma viride, and Saccharomyces cerevisiae; the ethanol yields of each process were compared. The highest ethanol yield was obtained with simultaneous microbial saccharification and fermentation of exploded product at a steam pressure of 2 MPa and a steaming time of 3 min.

• Journal of Nutrition and Health
• /
• 제48권1호
• /
• pp.113-121
• /
• 2015

본 연구는 무상급식 전환을 경험한 광주지역 중학생과 학교에서 근무하는 영양(교)사를 대상으로 하여 무상급식 전환에 따른 학교급식의 만족도와 인식을 조사하였으며 그 주요 내용은 다음과 같다. 학생들의 급식만족도는 무상급식으로 전환된 후에도 높은 편 (53.8%)이었는데 급식 만족도는 여학생이 남학생 보다 유의하게 높았다 (p < 0.001). 학생들의 불만족의 이유는 배식량의 감소 (35.2%)였으며, 만족의 이유는 경제적 이유 (50.0%)가 가장 높았다. 무상급식 전과 비교하여 전체 학생의 69.9%는 학교급식 만족도에서 변화가 없다고 하였는데, 성별 간의 유의적인 차이가 있었다. (p < 0.05). 전체 중학생의 80.2%는 식단의 변화가 없다고 하였고, 70.6%는 기호도가 높은 음식의 빈도가 변하지 않았다고 하였으며, 64.0%는 잔반의 양이 변하지 않았다고 하여, 유상급식에 비해 학교급식의 만족도에서 큰 차이를 느끼지 못하고 있었다. 무상급식 전환에 따른 학생들의 학교급식 만족도에 있어 영양(교)사의 85.7%는 학생들의 만족도가 차이가 없다고 인지하여 중학생보다 다소 높은 수준이었다. 또한 영양(교)사는 학생들의 불만족 이유에 대해 66.7%가 급식 양의 부족이라고 하였고, 만족의 이유로는 79.5%가 식재료의 질적 향상이라고 답하여, 학생들의 만족 이유와는 다소 다른 인식이었다. 무상급식으로의 전환에 따른 식단에 대해 영양(교)사의 40.5%는 변화가 있다고 하였는데, 식품비의 상승이 가장 큰 원인이었다. 영양(교)사들은 59.5%는 기호도가 높은 음식의 횟수에 대해 변화가 없다고 하였고, 식재료의 질적 변화에 있어 채소의 종류가 증가하였으며, 95.2%의 영양(교)사는 학생의 잔반량이 변하지 않았다고 인지하였다. 영양(교)사들은 무상급식 전환에 따른 급식 업무에 있어 식단을 작성 할 때 식재료의 구매 및 비용 (26.2%)에 의해 제약을 받으며, 식단 선택 시 급식비 (45.2%)를 우선 고려하였다. 무상급식 전환에 따라 달라진 업무의 내용은 사무관리 (26.2%), 조리법 연구 및 개발 (19.0%)이었다. 본 연구의 결과, 학생과 영양(교)사가 인식하는 학교급식의 만족도는 무상급식 전에 비해 크게 변하지 않았다. 또한 학생과 영양(교)사 모두 식단과 선호도가 높은 음식 및 잔반에 있어 큰 변화를 인지하지 못하였다. 다만 영양(교)사는 무상급식에 따라 사무관리 업무량이 변화하였다고 하였고 급식비에 의해 식단선택이 제한되며, 질적 변화를 가져온다고 한 바, 위의 결과를 토대로 급식환경을 포함한 다양한 요인들이 중학생들의 학교급식 만족도에 미치는 영향을 밝힐 추후 연구가 필요할 것이다.