• Journal of the East Asian Society of Dietary Life
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• v.24 no.4
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• pp.514-528
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• 2014

This study examined the actual state and future improvement of food allergies in adolescents and adults in order to prevent damage. In this survey, proportions of females, people in their 40s, college graduates, and office workers and housewives with allergies were higher than other groups. Exactly 41.1% of participants responded that they had experienced food allergies while 58.9% responded that they had not. According to their responses, the most common food allergy symptom involved the skin while whole-body allergic reactions were rare. Most respondents answered that frequency of their food allergies was two or three times. There was a variety of allergenic foods, including fast food, eggs, mackerel and milk, and instant food was ranked as the most allergenic food. Therefore, in order to protect consumers from damage caused by food allergens, the food allergen labeling system must be improved. A better food allergen labeling system should be implemented to avoid potential risks of allergic reactions and ensure national food safety.

• Journal of Gifted/Talented Education
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• v.25 no.1
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• pp.59-76
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• 2015

The study aimed to investigate elementary school gifted students' hypothesis-generating ability and characteristics of hypotheses and to analyze the correlation between hypothesis-generating ability and meta-cognition. Nineteen students enrolled in a science gifted education center affiliated with a university in 2013 were selected as research subjects. An instrument of open ended items about hypothesis generating was developed and administered to students, and their meta-cognition as well as their preferred science teaching method were examined. Hypotheses generated by students were classified into two categories: scientific and non-scientific hypotheses, and then a closer analysis was conducted on characteristics of non-scientific hypotheses. It was found that 47% (18 out of 38 hypotheses) was scientific ones showing that elementary school gifted students in science in this study presented low level of ability in generating hypothesis. It was also found that non-scientific hypotheses frequently showed characteristics of uncertain in causality or impossible to verify relationships. Furthermore, differences in hypothesis-generating ability and characteristics of hypotheses were appeared in conditions whether inquiry questions and variable identification process were given or not. Students showed high abilities in hypothesis generating and variable identifying when inquiry questions and variable identification process were given. Compared to previous research results, students in the study showed high level of meta-cognition and tendency of utilizing monitoring strategy more than planning and regulating. In ill-structured conditions that students themselves find inquiry questions and identify variables, a significant (p<.05) correlation appeared between hypothesis generating ability and meta-cognition and a high level of correlation between planning and regulating strategies. It was also found that differences existed in hypothesis-generating ability and preferred science teaching methods between students with high level and those with low level of meta-cognition; and students with low level of meta cognition showed difficulties in generating hypothesis and identifying variables.

• Journal of the Korean Society of Food Science and Nutrition
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• v.46 no.11
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• pp.1386-1396
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• 2017

The purpose of this study was to determine the optimum Platycodon grandiflorum root concentrate (PGRC, $65^{\circ}Brix$), fermented P. grandiflorum root extract by Lactobacillus plantarum (FPGRE, $2^{\circ}Brix$), and cactus Chounnyouncho extract (Cactus-E, $2^{\circ}Brix$) for preparation of PGRC stick product with FPGRE using response surface methodology (RSM). The experimental conditions were designed according to a central composite design with 20 experimental points, including three replicates for three independent variables such as amount of PGRC (8~12 g), FPGRE (0~20 g), and Cactus-E (0~20 g). The experimental data for the sensory evaluation and functional properties based on antioxidant activity and antimicrobial activity were fitted with the quadratic model, and accuracy of equations was analyzed by ANOVA. For the responses, sensory and functional properties showed significant correlation with contents of three independent variables. The results indicate that addition of PGRC contributed to increased bitterness and acridity based on the sensory test and antimicrobial activity, addition of FPGRE contributed to increased antioxidant activity and antimicrobial activity, and addition of Cactus-E contributed to increased fluidity based on the sensory test, antioxidant activity, and antimicrobial activity. Based on the results of RSM, the optimum formulation of PGRC stick product was calculated as PGRC 8.456 g, FPGRE 20.00 g, and Cactus-Ex 20.00 g with minimal bitterness and acridity, as well as optimized fluidity, antioxidant activity, and antimicrobial activity.

• Journal of Korean Society of Environmental Engineers
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• v.33 no.1
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• pp.47-53
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• 2011

$SF_6$ (Sulfur hexafluoride) possesses high GWP (Global Warming Potential) as sepcified by the IPCC (Intergonvernmental Panel of Climate Change). Recently, the recovery-separtion of $SF_6$ research area, including permeation properties studies using various membrane's materials and the practical operation of recovery-separtion using membrane of waste $SF_6$ gas is in the initial state. The separation efficiency of a single $SF_6$ and waste $SF_6$ mixture was evaluated using a PSF (polysulfone), PC (tetra-bromo polycarbonate) and PI (polyimide) hollow fiber membranes. According to the results of single gases permeation properties, PI membrane has the highest permselectivity of $N_2$ gas in $N_2/SF_6$ gas. Under the condition of P=0.5 MPa, the highest concentration of recovered $SF_6$ is 95.6 vol % in the separation experiment of $SF_6/N_2$ mixture gas by PC membrane. Under the operation pressure of P=0.3 MPa at a fixed retentate flow rate fixed of 150 cc/min, the maximum recovery efficiency of $SF_6$ is up to 97.8% by PSF membrane. From the results above, it is thought that the separation and recovery technique of $SF_6$ gas using membrane will be used as the representative eco-technology in the $SF_6$ gas treatment in the future.

• Korean Journal of Medicinal Crop Science
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• v.4 no.1
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• pp.68-73
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• 1996

Stem length, main root length and main root diameter showed rapid increasement in two-years-old and three-years-old peony. And there after, the increasement was almost finished. Occurrence of disease was increasing every cultivated year, especially the development of leaf spot was most serious. In propagation by root dividing method, the radix yield (kg/10a) was increasing every cultivated year. However, the difference of radix yield at four and five-years-old peony were not significant. The radix yield of four-years-old peony was higher 26% than three-years-old one. As cultivated year goes by, content of paeoniflorin was increasing then the content was highest at four-years-old peony (4.06%). In 1995, the content, had no certain tendency, was highest at three-years-old peony (3.14%). At hot air drying, browing of peony radix was increasing every cultivated year. If we consider radix yield and color, three-years-old peony was proper object of harvesting.

• Journal of Hospice and Palliative Care
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• v.7 no.1
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• pp.37-48
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• 2004

Purpose: Population using complementary and alternative medicine (CAM) and the cost or it are increasing all over the world. In this study, we investigated the utilization state of CAM in the elderly people during the last 6 months of life. Methods: We found 4,210 persons in Seoul, older than 65 years who received a funeral subsidy from health insurance after death during the latter half of the year, 2001. We stratified them by age and gender and selected 301 persons and surveyed them by questionnaire. Results: 247 persons (83.1%) used at least one of CAM during their last 6 months of life. Diet and Nutrition remedy showed the highest utilatization rate (65.5%), and drug therapies also were much used (29.9%). Utilization rate was higher in female (60%) and according to the cause of death, the highest in a geriatric disease groups, and the lowest in the cancer group. Whole satisfaction to CAM was high with average 4.25 points out of total 6, and adverse effects were almost free with average 5.55 points out of total 6. Satisfaction was the highest in Diet and Nutrition remedy but the lowest in Manipulative and Body-Based methods. Adverse-effect score was best in Manipulative and Body-Based methods. According to age and the causative disease of death, there were significant differences in satisfaction and adverse effect levels. Conclusion: Majority of old people used at least one of CAM during their last 6months of life. Whole satisfaction and adverse-effect level were very excellent.

• Korean journal of food and cookery science
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• v.4 no.2
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• pp.31-38
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• 1988

The chicken cooked by three different methods were put and sensory evaluation, mechanical and chemical composition test. The results were as following : 1. Standard recipe were as followig : \circled1 Kettle cooking was chicken 700 g, waxyrice 100 g, garlic 30 g, water 2000 cc, time 60 min. \circled3 Pressure cooking was chicken 700 g, waxyrice 100 g, garlic 30 g, water 2000 cc, time 30 min. \circled3 Microwave cooking was chicken 700g, waxyrice 100 g, garlic 30 g, water 1000 cc, time 30 min. 2. Sensory evaluation \circled1 There were no typical difference of the color of soupstock with in the three cooking methods. \circled2 The turbidity of soupstock was from Kettle cooking, microwave cooking and pressure cooking in turn. \circled3 There were no typical difference of the viscosity of soupstock with in the three cooking methods. \circled4 The kettle cooking was the best of mouthfeel and taste. \circled5 There were no typical difference of muscle, with in the three cooking methods. 3. Mechanical Test \circled1 The result of the cutting force of muscle which measured by rheomether were the leg muscle was more tough than breast muscle. \circled2 The viscosity of boiled rice was from kettle cooking, pressure cjooking and microwave cooking in turn. \circled3 The result of the turbidity of soupstock which measured by spectrophotmeter was from kettle cooking, pressure cooking and microwave cooking in turn. 4. Proximate chemical composition \circled1 Protein of muscle was 20.30-25.67%, Soupstock was 0.29-0.72% \circled2 Fat of muscle was 27.29-47.15% , Soupstock was 37-68.38%. \circled3 Potasium of muscle was 2.75-3.6 mg, Soupstock was 1.15-6.3 mg. \circled4 Iron of muscle was 1.17-1.39 mg, Soupstock was 0.96 mg.

• Proceedings of the KSCN Conference
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• 2003.11a
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• pp.1053-1054
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• 2003

유아기는 식품 기호도, 식사예절, 식습관 등 식행동의 기초가 형성되는 시기로서 특히 편식이 생기기 쉽고, 식욕부진과 영양과잉 등 불균형한 식품 섭취로 인한 영양문제를 초래할 수 있다. 본 연구에서는 2003년 7월 구미지역 2개 보육시설의 92명 유아들의 부모들을 대상으로 설문조사를 실시하여 유아들의 식습관과 식품 기호도를 조사하고 이를 고려하여 유아를 위한 메뉴를 개발하고 평가하였다. 개발한 메뉴는 일반식 (삼각김밥, 오징어전), 편식 (도라지강정, 브로콜리스프), 빈혈식(쇠간함박스테이크, 참치깻잎쌈밥), 비만식(참치샐러드, 닭안심깻잎조림), 전통식(떡찜, 두부선) 등 각 2가지씩 총 10가지이며, 2003년 10월 시식회를 거쳐 656명의 유아들에게 맛, 냄새, 모양, 조직감, 전반적인 기호도 등에 대해 5점 척도법으로 메뉴평가를 실시하였다. 식습관 조사결과 편식습관이 있는 경우가 70.7%였으며, 평소 싫어하는 음식에 대해서는 권유로 마지못해 먹는다가 67.4%로 가장 많았다. 성별에 따른 유아의 식습관을 분석해 본 결과 전반적으로 남녀간 유의한 차이는 없었으나 남아가 여아보다 탄산음료를 즐겨 마시는 것으로 나타났다(p<0.05). 기호도 조사결과 10가지 식품군 중 과일류에 대한 기호도(3.97$\pm$0.65점)가 가장 높았고, 채소류에 대한 기호도(2.46$\pm$0.68점)가 가장 낮았으며, 기호도가 특히 낮았던 식품으로는 곡류 및 감자류 중에는 보리밥과 콩밥, 육류 및 가공품 중에는 간과 내장, 두류 및 가공품 중에는 팥, 어패류 중에는 굴, 해조류 중에는 파래, 채소류 중에는 토란, 브로콜리, 도라지 등이었다. 조리법별로는 튀김류(3.80$\pm$0.68)가 가장 높았고 그 다음이 볶음ㆍ구이류(3.77$\pm$0.56)였으며 기호도가 가장 낮은 음식은 생채류(2.61$\pm$1.27)와 숙채류(2.85$\pm$1.13)인 것으로 나타났다. 개발한 메뉴의 선호도는 전반적으로 높았으며 맛에 대한 선호도(4.30$\pm$0.91)가 가장 높았고, 모양에 대한 선호도(3.95$\pm$0.89)가 가장 낮았다. 메뉴별 맛에 대한 선호도는 닭안심깻잎조림 (4.85$\pm$0.36)과 두부선(4.85$\pm$0.52)이 가장 높았고, 참치깻잎쌈밥(3.43$\pm$1.61)이 가장 낮았으며 냄새에 대한 선호도는 두부선(4.76$\pm$0.69), 닭안심깻잎조림 (4.64$\pm$0.53), 브로콜리스프(4.59$\pm$0.88)가 유의하게 높았고 참치깻잎쌈밥(2.95$\pm$1.24)은 유의하게 낮았다. 모양에 대한 선호도는 두부선이 4.85$\pm$0.52점으로 유의하게 높은 점수를 보였으며 쇠간함박스테이크(3.03$\pm$0.17)와 참치깻잎쌈밥(3.11$\pm$1.33)이 유의하게 낮은 점수를 보였다. 조직감에 대한 선호도는 두부선(4.80$\pm$0.56)과 브로콜리스프(4.63$\pm$0.60)가 유의하게 높게 나타났고, 참치깻잎쌈밥(3.20$\pm$1.29)이 유의하게 낮았다. 전반적인 선호도는 맛, 냄새, 모양, 조직감에서 모두 선호도가 높았던 두부선이 4.82$\pm$0.49점으로 가장 유의하게 높았으며 참치깻잎쌈밥이 3.17$\pm$1.30점으로 가장 낮게 나타났다. 음식의 맛, 냄새, 모양, 조직감 및 전반적인 기호도간에는 모두 유의한 상관관계가 있는 것으로 나타났다(p<0.01). 따라서 음식의 맛에 영향을 주는 요인은 맛 자체뿐만 아니라 냄새, 모양, 조직감 등 다양하므로 어릴 때부터 가정과 보육시설에서 다양한 식품과 조리법을 이용하여 맛있고, 먹고싶은 냄새가 나고, 부드러우며, 모양도 먹음직스럽게 조리하여 유아들의 올바른 식습관 형성에 도움이 되도록 하는 것이 필요할 것으로 사료된다.

• Journal of Bio-Environment Control
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• v.31 no.2
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• pp.79-89
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• 2022

With the wide use of greenhouses, the working hours have been increasing inside the greenhouse for workers. In the closed ventilated greenhouse, the internal environment has less affected to external weather during making a suitable temperature for crop growth. Greenhouse workers are exposed to organic dust including soil dust, pollen, pesticide residues, microorganisms during tillage process, soil grading, fertilizing, and harvesting operations. Therefore, the health status and working environment exposed to workers should be considered inside the greenhouse. It is necessary to secure basic data on particulate matter (PM) concentrations in order to set up dust reduction and health safety plans. To understand the PM concentration of working environment in greenhouse, the PM concnentrations were monitored in the cut-rose and Hallabong greenhouses in terms of PM size, working type, and working period. Compare to no-work (move) period, a significant increase in PM concentration was found during tillage operation in Hallabong greenhouse by 4.94 times on TSP (total suspended particle), 2.71 times on PM-10 (particle size of 10 ㎛ or larger), and 1.53 times on PM-2.5, respectively. During pruning operation in cut-rose greenhouse, TSP concentration was 7.4 times higher and PM-10 concentration was 3.2 times higher than during no-work period. As a result of analysis of PM contribution ratio by particle sizes, it was shown that PM-10 constitute the largest percentage. There was a significant difference in the PM concentration between work and no-work periods, and the concentration of PM during work was significant higher (p < 0.001). It was found that workers were generally exposed to a high level of dust concentration from 2.5 ㎛ to 35.15 ㎛ during tillage operation.

• Journal of Practical Agriculture & Fisheries Research
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• v.18 no.1
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• pp.13-24
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• 2016

Sixty Hanwoo steers(15 months of age; 409±29.2 kg of BW) were used to evaluate the effects of dietary vitamins A and D restriction on carcass characteristics. Steers were allotted randomly to 1 of 4 treatments: Control(diet supplemented with vitamins A, D and E), -A (diet supplemented with vitamins D and E), -D(diet supplemented with vitamins A and E) and -AD(diet supplemented with vitamin E only). Steers were fed the experimental diet for a period of 8 months(until 23 months of age), and then supplemented with vitamins A and D at 0.05% of the diet(as fed-basis) from 24 to 26 months of age, and at 0.1% of the diet from 27 to 31 months of age(harvesting time). Dietary restriction of vitamins A and D did not affect DM intake, daily gain and feed conversion ratio. But the concentration of serum retinol was significantly(P<0.05) decreased by vitamin A restriction with the lowest concentration being seen at 23 months of age(345.0 ㎍/L and 326.7㎍/L for control and -D treatment versus 169.3 ㎍/L and 175.4 ㎍/L for -A and -AD treatments). The serum concentration of 25(OH)D₃ was also decreased significantly(P<0.05) by vitamin D restriction and the lowest concentration was seen at 18 months of age(53.7ng/ml and 61.8ng/ml for control and - A treatment versus 24.0 ng/ml and 24.5 ng/ml for -D and -AD treatments). After the restriction period of vitamins A and D, the concentrations of retinol and 25(OH)D₃ for - A, -D and -AD treatments were recovered at those of control. Dietary restriction of vitamins A and D did not affect carcass weight, backfat thickness, ribeye area, quality grade and yield grade. But marbling score was significantly increased by vitamin A restriction compared with control(6.73, 6.87 and 5.73 for -A, -AD and control, respectively). The results of the present study suggested that dietary vitamin A restriction could improve marbling score in Hanwoo steers.