총설 : 전자기파의 생체 위해성에 관한 소고

정경아 ( Kyung Ah Jung ),계명찬 ( Myung Chan Gye ) 한국환경생물학회 2011 환경생물 : 환경생물학회지 Vol.29 No.4

The safety of human exposure to an ever increasing number and diversity of electromagnetic field (EMF) sources both at work and at home has clearly become a public health issue. To date many in vivo and in vitro studies revealed that EMF exposure can alter cellular metabolism, endocrine function, immune activity, reproductive function, and fetal development in animal system. The major parameters found to be altered in cells or individuals following EMF exposure include an increase of free radicals, DNA damage, cancer risk, developmental defect, and reproductive dysfunctions. Epidemiological studies reported EMF can increase life threatening illnesses such as leukemia, brain cancer, amyotrophic lateral sclerosis, clinical depression, suicide, and Alzheimer`s disease has been identified. These effects of EMF exposure differ according to duration of exposure, frequency of waves, and strength (energy) of EMF. In the present review, we briefly introduced the physical properties of EMF and summarized the effect of EMF on human and wildlife animals according to types of EMF, duration of exposure at cellular and organism levels.

학령기 아동의 식생활 문제에 관한 국내 연구 동향

정경아(Kyung-Ah Jung) 한국실과교육학회 2009 한국실과교육학회지 Vol.22 No.3

본 연구는 학령기 아동의 식생활 문제에 관한 국내 연구 동향을 분석하기 위하여 수행되었다. 1980년~2008년까지 국내 학회지에 발표된 연구 논문을 대상으로 국내 대표적 전자문헌 검색 사이트를 이용하여 초등학교, 초등학생, 학동기, 학령기 등을 키워드로 하는 논문을 검색하여 수집하였다. 그 결과1980년 이후 학령기 아동의 식생활 문제에 관한 연구 논문은 총 256편이 발표되었고 1990년 중반부터 양적으로 꾸준히 증가하였다. 연도별로 발표된 논문의 연구 주제에 차이가 있었으며(p=0.000), 1986년~1990년에는 학교급식(31.3%) 및 영양상태(31.3%)에 관한 연구가 주를 이루었고, 1991년~1995년에는 식품섭취(25.0%) 및 학교급식(25.0%)에 관한 연구, 1996년~2000년에는 비만에 관한연구(31.7%), 2001년~2005년에는 비만(26.4%)과 식습관(26.4%)에 관한 연구, 2006년~2008년에는 식품섭취에 관한 연구(21.7%)가 많이 수행되었다. 영양교육에 관한 연구는 비교적 늦게 시작되어 최근에 활발하게 수행되고 있었다. 주로 사용된 연구 방법은 실태조사였으며(79.7%) 연구 주제에 따른 연구 방법에 차이가 있었다(p<0.001). 연구 지역에 관한 연구 동향을 보면 1개 지역을 연구 대상으로 한논문이 87.5%로 가장 많았고, 1990년 후반으로 오면서 2~3개 지역을 대상으로 하는 논문들이 증가하였다. 지역별로는 서울(31.3%)과 경기도(21.9%)가 가장 많이 연구 지역으로 포함되었고, 상대적으로 다른 지방 도시들이 연구에 포함되는 경우는 적었다. 대부분의 논문들이 일반 아동을 대상으로 수행되었고(90.2%), 1개 학년을 연구 대상으로 한 논문이 가장 많았다(32.0%). 연구의 대부분이 5, 6학년을대상으로 수행되어 저학년을 대상으로 한 논문은 상대적으로 적었다. 연구 대상자의 수는 실태조사의 경우 201~300명 정도를 대상으로 한 논문이 18.6%로 가장 많았고, 실험 연구는 100명 이하를 연구대상으로 한 논문이 77%인 것으로 분석되었으나 연구마다 편차가 매우 심하였다. 향후 학령기 아동을 대상으로 식생활과 관련된 연구를 하고자 할 때는 본 연구의 결과를 토대로 그동안 소외되었던 연구지역이나 학년을 고려하는 것이 필요하다. 또한 학령기 아동을 대상으로 한 영양교육의 필요성이 강조되고 있으므로 다양한 방법으로 시도된 영양교육의 효과에 관한 연구뿐만이 아니라 효과적인 영양교육을 위한 매체 개발에 관한 연구가 요구된다. This study is to investigate the trend of researches on problems related to eating behaviors of elementary school students from 1980 to 2008, especially focused on the subject, design, and target population of research. The literatures were collected by performing key word searches from web site: children elementary school elementary students etc. Total 256 studies were published during the period and the studies have increased quantitatively since the mid 1990s. The major subjects of study are categorized as obesity, food consumption, dietary behaviors, school lunch, nutrition status and nutritional education. When analyzing the trends of research subject according to the period of 5 years, during 1986~1990, researches on school lunch(31.3%) and nutrition status(31.3%) were the most frequently reported, during 1991~199, on food consumption(25.0%) and school lunch(25.0%), during 2001~2005, on obesity(26.4%) and dietary behaviors(26.4%), and during 2006~2008, on food consumption(21.7%)(p=0.000). Researches on nutritional education were conducted comparatively recently. The most frequent research design was the descriptive survey(79.7%). There were differences in design according to the research subjects(p<0.001). When analyzing the trends of target areas, most were studied in 1 area(87.5%) and Seoul(31.3%) and Gyeongi-do(21.9%) were the most frequent target areas. Most studies were conducted in normal children(90.2%) and at only 1 grade(32.0%). The grade of target population was usually 5th or 6th grade. Studies for lower grade of 1st~3rd were not many. The numbers of target population were different according to the research design and have severe deviation even in the same research design. In conclusion, the researches on problems related to eating behaviors of elementary school students conducted since 1980 have a bias toward research design, target area, and target grade. When studying problems related to eating behaviors of the elementary school students, it is needed to diversify research design, target areas and target grades. Also, more studies on the effects of nutritional education and the nutrition education materials for elementary school students are recommended.

곡류 급원에 따른 흰쥐의 간과 혈중 지질농도에 관한 연구

정경아(Jung Kyung-Ah),장유경(Chang Yu-Kyung) 韓國營養學會 1995 Journal of Nutrition and Health Vol.28 No.1

초등학교 5, 6학년 아동의 식습관과 교사의 식생활교육 실태 및 인식에 관한 연구

정경아(Kyung Ah Jung) 한국조리학회 2012 한국조리학회지 Vol.18 No.3

This study was conducted to investigate the dietary habits and nutritional knowledge of 5th and 6th graders and the teachers` perception of dietary life education at the elementary schools in Chuncheon area. The children who had breakfast and supper everyday accounted for 54.1% and 80.3% each. Children consumed ``breads or confectioneries``(42.6%) and ``fruits or juices``(39.3) as snacks. Only 57.4% of the children had balanced diet. Only 59% of the children answered correctly at the nutritional knowledge test, and only 75% had good dietary behaviors. About 78% of the teachers had the experiences of dietary life education, and they taught it in class(38.9%) or at school lunchtime(35.2%). The teachers answered that the major nutrition problems of elementary students were bad eating habits(37.7%) and too much ingestion of fast or instant foods(36.2%). They also answered that dietary life education was necessary(79.7%) and should be started more earlier(87.0%). Ironically, about 49% of the teachers answered that dietary life education should be taught by dietitians even if the teacher who spent most of the time with their students is the best person for dietary life education at school. It should be done in children`s daily life, especially for elementary school students. Therefore, teachers should recognize the importance and the specialty of dietary life education at the elementary schools.

강원지역 초등학교 5, 6학년 학생들의 조리활동에 필요한 기초 조리능력 및 식품준비 능력에 관한 연구

정경아(Kyung Ah Jung) 한국조리학회 2011 한국조리학회지 Vol.17 No.3

This study was conducted to investigate the cooking and food preparation skills of the elementary students based on the total 310 recipes made by the students who participated in the ``Cooking Competition`` in Gangwon Province. Of cutting methods, the ``cutting into small dice`` was used in 79.4% of the recipes and ``stir frying`` in 76.8% of the recipes. Other cooking methods were used as follows; ``blanching``(24.2%), ``roasting``(22.6%), ``pan frying``(21.0%), ``deep fat frying``(18.7%), etc. The use of ``Boiling`` increased significantly(p=0.044) from 4.5% in 2008 to 10.0% in 2010 while the use of ``deep fat frying`` decreased significantly(p=0.027) from 21.8% to 10.9%. The frequency of using cooking tools was as follows; knives and cutting boards(100.0%), dishes(92.9%), frypans(91.3%), chopsticks(40.3%), spoons(38.7%), etc. The foods used in cooking were as follows; rice(100.0%), carrots(67.1%), onions(61.9%), eggs(41.6%), paprika(27.7%), kimchi(25.2%), pizza-cheese(22.9%), etc. Natural and processed foods were used in cooking as the ratio of 80:20 approximately. Of the 5 food groups, ``meat·fish·egg·bean`` decreased from 24.44±13.27% in 2008 to 20.84±10.59% in 2010, but ``vegetables`` increased from 44.38±15.65% to 50.64±14.07% significantly(p<0.05). In conclusion, 5th and 6th graders had an ability to select various foods for their health when cooking even if they have some foods they don`t like while they lacked cooking skills such as using various cutting methods and proper cooking tools.

초등 예비교사 대상 실과 식생활 실습수업에 문제중심학습(PBL) 적용 효과

정경아(Jung, Kyung-Ah),양정혜(Yang, Jeonghye) 한국실과교육학회 2021 한국실과교육학회지 Vol.34 No.4

이 연구는 예비교사의 실습지도 능력을 향상시키기 위하여 문제중심학습(PBL)을 적용하여 효과를 분석하였다. 본 연구에서 예비교사들이 해결해야 할 문제는 건강한 간식 만들기 실습을 구안하고, 실습수업을 위한 계획을 세워 직접 실행해보고 그에 적합한 지도안을 작성하는 것이다. 수업은 1) 문제제시 및 확인 2) 문제해결을 위한 자료 수집 3) 문제 해결안 도출 4) 실습진행 5) 문제해결안 수정 6) 결과 발표로 진행하였다. 연구대상자는 C 교육대학교 3학년 학생 중 초등 실과교육 과목을 수강하는 학생 154명이다. 창의적 문제해결력, 자기효능감, 수업만족도 등에 대하여 통계적 검증을 진행하였다. 연구결과 예비교사의 창의적 문제해결력과 교사효능감은 Paired t-test 결과 통계적으로 유의미한 차이가 나타났으며(P<.001), 수업 만족도는 4.7로 높은 편으로 나타났다. 예비교사의 문제중심학습에 대한 성찰지를 분석한 결과를 살펴보면 첫째, 문제중심학습을 진행하면서 교사로서 실습수업에 대한 이해도가 높아졌다. 둘째, 비대면과 대면으로 진행된 조별활동을 통해서 의사소통 및 배려의 역량을 기를 수 있었다. 셋째, 교사에게 주어진 문제를 해결하는 역량을 기를 수 있었던 것으로 나타났다. This study analyzed the effectiveness of applying problem-based learning to improve the practice guidance ability of pre-service teachers. The problem that pre-service teachers need to solve in this study is to devise a healthy snack cooking practice, make a plan for the practice class, implement it themselves, and prepare a suitable guidance plan. Classes were conducted by 1) presenting and confirming problems 2) collecting information for problem solving 3) deriving problem solving plans 4) conducting practice 5) revising problem solving 6) presenting results. This study used the one group pretest and posttest design, sampling 156 students who were in the 3rd grade of C University of Education. Statistical verification was conducted on creative problem-solving skills, self-efficacy and class satisfaction. As a result of the study, there was a statistically significant difference in the creative problem-solving ability and self-efficacy of pre-service teachers(P<.001), and the class satisfaction was high at 4.7. The results of analyzing the reflection papers on problem-based learning of pre-service teachers show that, first, the understanding of practical classes as teachers increased while conducting problem-based learning. Second, it was possible to develop the ability to communicate and be considerate through non-face-to-face group activities. Third, it was found that it was possible for teachers to develop the ability to solve problems given to them.

경북지역 초등학교 6학년 학생들의 가정과 학교에서의 조리활동 실태

정경아(Kyung Ah Jung),박상와(Sang Wa Park) 한국조리학회 2012 한국조리학회지 Vol.18 No.2

This study was conducted to investigate the state of cooking activities at home and at school among the elementary school 6th graders in Gyeongbuk province. For ``interest in cooking``, 86.9% of the subjects answered ``very interested,`` and the answers were significantly different according to sex(male 45.6%, female 77.8%, p<0.01). Above 70.0% of the subjects answered that they could cook by themselves and the responses were significantly different according to sex(male 35.3%, female 66.7%, p<0.01). The children had experiences of chopping(64.8%), slicing round(62.3%), cutting dice(62.3%), cutting julienne(53.3%), cutting diagonally(45.1%), slicing semicircle(34.4%), and cutting paysanne(22.1%). 93.4% of the subjects had cooking experience at home and most parents(95.1%) were positive to children`s cooking at home. The reasons for cooking at home were ``like to cook``(55.3%), ``to satisfy hunger``(17.5%), ``to eat foods that I want``(14.0%), etc. The only 10.7% of the subjects answered ``difficult`` or ``very difficult`` for the cooking classes at school. The 62.3% of the subjects have cooked the foods again at home that they learned at school, and the responses were significantly different according to sex(p<0.05). The foods that the children wanted to cook at school were pizza, spaghetti, Tteokbokki, hamburgers, etc. The children answered that they had difficulties in ``seasoning``(34.4%) and ``cleaning up after cooking``(21.5%). What the children wished about the cooking class of their schools included ``to cook more often``(35.8%), ``to cook more diverse foods``(29.7%), ``to have the school equipped with cooking tools and facilities``(14.8%), etc. Therefore, the cooking classes for the elementary school students need to be planned considering these results about children`s cooking abilities, skills and demands.

폐경기 여성의 식이 지방산 및 혈청 인지질의 지방산 조성과 혈청 지질 농도의 관계

정경아 ( Kyung Ah Jung ),김상연 ( Sang Yeon Kim ) 대한가정학회 2006 Family and Environment Research Vol.44 No.7

일부 중,고등학교 리듬체조 선수와 지도자의 영양정보원 및 영양지식에 관한 연구

정경아 ( Kyung Ah Jung ),황세희 ( Se Hee Hwang ),김찬 ( Chan Kim ),차상은 ( Sang Eun Cha ),장유경 ( Yoo Kyung Chang ) 한국운동영양학회 2004 Physical Activity and Nutrition (Phys Act Nutr) Vol.8 No.2

The purpose of this study was to investigate the nutrition information sources and the nutrition knowledge in 41 rhythmic gymnasts aged 14.8±1.5 years and 17 coaches by questionnaires. Information about weight control, nutritional knowledge and its source, and food intake were collected by individual interview. Food intake was investigated with the 24 hours recall and two days dietary record methods. The results were as follows. All rhythmic gymnasts had experienced weight control. Most of them (97.6%) preferred `food restrict` as methods for weight control. Only fifty-one percent of rhythmic gymnasts had ever received the nutritional information. Their major information sources were parents & friends (76.2%). Eighty-two percent of rhythmic gymnasts wanted to obtain the nutritional information from the mass media and nutritionist & dietitian by the methods such like internet or nutrition counseling. Seventy-seven percent of coaches had ever counseled rhythmic gymnasts on nutrition, especially on the diet for weight control (92.3%). Their major information source were the mass media and curriculum. All coaches wanted to get the nutritional information from the nutritionist & dietitian and specialized books & dictionary by the methods such like internet or nutrition counseling. Total nutritional knowledge score of rhythmic gymnasts was 28.4 of 50 scores. Categorical score was the highest at the knowledge on `food source` and the lowest at the knowledge on `food exchange`. Total nutrition knowledge score of coaches was 37.6 of 50 scores, and higher than score of rhythmic gymnasts. Categorical score was the highest at the knowledge on `food sources` and the lowest on `food exchange` like rhythmic gymnasts. All nutrient intakes except vitamin C were higher in the group have received nutrition information compared with the group have not. In conclusion, it is very necessary to give rhythmic gymnasts and their coaches professional nutrition information by the information sources and methods they want. It could be helpful for improving the nutrition knowledge and enhancing performance of rhythmic gymnasts.

폐경기 여성의 혈청 과산화지질 농도에 따른 항산화비타민의 영양상태

정경아(Jung Kyung-Ah),김상연(Kim Sang-Yeon),최윤정(Choi Yoon-Jung),우정익(Woo Jeong-Ik),장유경(Chang Yu-Kyung) 韓國營養學會 2001 Journal of Nutrition and Health Vol.34 No.3