• 한국환경농학회지
• /
• 제12권3호
• /
• pp.281-297
• /
• 1993

Nitrogen is an element required to meet optimal plant growth. However, when it was applied (as chemical fertilizer or animal waste) more than the demand of plant and managed it unreasonably can be accumulated in subsoil and leached from soil system. Nitrogen also can be act as an pollutant to soil and water through water contamination if its concentration exceed the critical level. The concentration and downward movement of nitrate in soil is influenced by cultural practices and soil properties. High level of nitrate nitrogen in drinking water is harzadrous for animal and human health, especially for infants and the restoration of the quality of groundwater is impossible by now. Therefore it is the only way to prevent from leaching of nitrate nitrogen to keep the quality of groundwater as vital water resource. The aims of the presentation of this review paper are to understand the relationship between agricultural practices and the concentration of nitrate nitrogen in groundwater and to suggest further informations for the rational management methods to reduce the leaching of nitrate nitrogen in soil.

• 대한지역사회영양학회지
• /
• 제15권2호
• /
• pp.227-239
• /
• 2010

The purpose of this study was to compare weight control behaviour, eating habits and health-related life habits according to the obesity degree by body fat percentage (%Fat) among middle-aged women. The subjects were 170 middle-aged women who lived Gunsan City, and they were assigned to one of the following groups based on their %Fat; normal weight group (18% - < 28%), overweight group (28% - < 33%) and obesity group (over 33%). The height, body weight, %Fat, the circumference of waist and hip of them were measured. Eating habits and health-related life habits were evaluated based on questionnaires. The results were as follows. Their weight, %Fat, body mass index (BMI), relative body weight (RBW), waist, hip, and waist-hip ratio (WHR) were significantly higher in the obesity subjects when compared to the normal and overweight subjects. Self-perception for weight (p < 0.001), desire for weight control (p < 0.01), and reasons of weight control (p < 0.05) were different among three groups. The main skipped meal was breakfast (67.9%), reasons of skipping meals were different among three groups (p < 0.05), and main reasons were "lose one's appetite" and "have not enough time". Food habits score for each food was not significantly different among three groups, but eating the meal on thinking with food combination in normal group was higher than overweight and obesity group (p < 0.01). Correlation coefficients of food habits score and anthropometric measurements were that salty of food was negative and food habits scores were positive correlation for anthropometric measurements and obesity index (p < 0.05 - p < 0.001). Frequency of exercise and fitting exercise for body were different among three groups (p < 0.05). Obesity group was lower frequency of exercise than the other groups. Regular diet was positive correlation with food combination (p < 0.01), taking fish (p < 0.05), taking vegetables (p < 0.01), taking bean products (p < 0.01) and food habits score (p < 0.01), frequency of eating out and snacks were negative correlation with taking fruits and fishes. Therefore, proper nutritional education for middle-aged women in obesity group is recommended regular diet, good food habits and exercise. The middle-aged women must decrease the frequency of eating out, snack and the salty foods, and increase the fruits and vegetables. They must have healthy life styles for exercise, smoking, and drinking.

• Asian Pacific Journal of Cancer Prevention
• /
• 제14권4호
• /
• pp.2217-2220
• /
• 2013

Background: Knowledge regarding risk factors and primary signs of oral cancer in the general population can help them to avoid risky behaviour and seek timely advice from a physician. The aim of this study was to survey adult knowledge about risk factors and signs of oral cancer in Shiraz Dental University. Materials and Methods: In this descriptive cross-sectional study using an investigator-made questionnaire, 783 adults who were referred to Shiraz Dental University participated. Questionnaire data were analyzed by ANOVA and T-test. Results: The results showed that 32.3% of participants were aware of oral cancer and gained their knowledge from the media. The risk factors mentioned by these participants was as follows: sunlight 30.8%, hot and peppery food 40.7%, alcoholic drinks 47.4% and smoking 73.6% (there was significant relationship for drinking alcohol and gender, education and times of using dental service, p<0.05). They also mentioned the primary signs of oral cancer as follows: red patch without pain 27.8%, white patch without pain 13.5% and prolong scarring without pain 56.7% (there was significant relationship between these three signs and education and times of using dental service, p<0.05). The mean knowledge about the risk factors and signs of oral cancer were 1.94 from 5 with 1.14 standard deviation and 0.96 from 3 with 0.93 standard deviation. Conclusions: The observed low level of knowledge of people regarding both risk factors and signs of oral cancer emphasizes the need for more efforts to be made about the above mentioned issues by the media.

• Advances in environmental research
• /
• 제3권1호
• /
• pp.45-69
• /
• 2014

The groundwater has been a major source of water supply throughout the ages. Around 50% of the rural as well as urban population in the developing countries like India depends on groundwater for drinking. The groundwater is also an important source in the agriculture and industrial sector. In many parts of the world, groundwater resources are under increasing threat from growing demands, wasteful use and contamination. A good planning and management practices are needed to face this challenge. A key to the management of groundwater is the ability to model the movement of fluids and contaminants in the subsurface environment. It is obvious that the contaminant source activities cannot be completely eliminated and perhaps our water bodies will continue to serve as receptors of vast quantities of waste. In such a scenario, the goal of water quality protection efforts must necessarily be the control and management of these sources to ensure that released pollutants will be sufficiently attenuated within the region of interest and the quality of water at points of withdrawal is not impaired. In order to understand the behaviour of contaminant transport through different types of media, several researchers are carrying out experimental investigations through laboratory and field studies. Many of them are working on the analytical and numerical studies to simulate the movement of contaminants in soil and groundwater of the contaminant transport. With the advent of high power computers especially, a numerical modelling has gained popularity and is indeed of particular relevance in this regard. This paper provides the state of the art of contaminant transport and reviews the allied research works carried out through experimental investigation or using the analytical solution and numerical method. The review involves the investigation in respect of both, saturated and unsaturated, porous media.

• 한국지구물리탐사학회:학술대회논문집
• /
• 한국지구물리탐사학회 2003년도 Proceedings of the international symposium on the fusion technology
• /
• pp.544-547
• /
• 2003

The objective of this study is to investigate the contamination levels and dispersion patterns of arsenic and heavy metals and to estimate the bioaccessible fraction of the metals in soil and plant samples in the vicinity of the abandoned Songcheon Au-Ag mine. Tailings, soils, plants (Chinese cabbage, red pepper, soybean, radish, sesame leaves, green onion, lettuce, potato leaves, angelica and groundsel) and waters were collected around the mine site. After appropriate preparation, all samples were analyzed for As, Cd, Cu, Pb and Zn by ICP-AES and ICP-MS. Elevated levels of As and heavy metals were found in tailings. Mean concentrations of As in agricultural soils were higher than the permissible level. Especially, maximum level of As in farmland soil was 513 mg/kg. The highest concentrations of As and Zn were found in Chinese cabbage (6.7 mg/kg and 359 mg/kg, respectively). Concentrations of As, Cd, and Zn in most stream waters which are used for drinking water around this mine area were higher than the permissible levels regulated in Korea. Maximum levels of As, Cd and Zn in stream waters were 0.78 mg/L, 0.19 mg/L and 5.4 mg/L, respectively. These results indicate that mine tailings can be the main contamination sources of As and heavy metals in the soil-water system in the mine area. The average of estimated bioaccessible fraction of As in farmland soils were $3.7\%$ (in simulated stomach) and $10.8\%$ (in simulated small intestine). The highest value of bioaccessible fraction of metal in farmland soils was $46.5\%$ for Cd.

• 한국학교보건학회지
• /
• 제28권3호
• /
• pp.211-219
• /
• 2015

Purpose: The purpose of this study was to examine the effect of health education based on life skill training (LST) on middle school students' health knowledge, attitude, and behavior. Methods: For this study, 961 middle school students, residing in Seoul, Korea, were selected. The students received health education one day a week for 7 weeks from September 1, 2014 to October 25, 2014. Before and after the whole education program, the students filled out questionnaires surveying on their health knowledge, attitude, and behavior. Excluding inappropriate data, the data of 843 students was analyzed through Paired t-test. Results: After the education program based on LST, there were statistically significant increases in the scores for knowledge about drinking, body image distortion, good eating habits, right usage of smartphone, and prevention of smartphone addiction (p<.05). There were also statistically significant increases in the scores for attitude toward smoking, drug, good eating habits and prevention of smartphone addiction (p<.05). There were statistically significant increases in the scores for behavior regarding drug, good eating habits, right usage of smartphone and prevention of smartphone addiction (p<.05). Conclusion: Health education based on life skill training was especially effective in improving the subjects' scores for health knowledge, attitude, and health behavior. Therefore, various and systemic LST educational programs should be developed and implemented and their effects should be evaluated in further studies.

• 한국학교보건학회지
• /
• 제21권2호
• /
• pp.119-134
• /
• 2008

Purpose: The purpose of this study is to understand a variety of intervention studies to prevent smoking by adolescents in U.S. and find out implications for Korea. Methods: This study reviewed articles found in the internet and analysed the data of US DHHS and CDC. Results: The School Health Policies and Programs Study (SHPPS) is a national survey periodically conducted to assess school health policies and programs of U.S. The main components of SHPPS are health education and physical education, health services, mental health and social services, school policies, and school environments. The CDC guidelines for school health programs to prevent tobacco use and addiction are composed of policy, instruction, curriculum, training, family involvement, tobacco-use cessation efforts, and evaluation. School-based interventions to prevent smoking can be classified into the categories of information-giving curricula, social competence curricula, social influence approaches, combined methods draw on social competence and social influence approaches and multi-modal programmes and Youth Empowerment study. The key programs for adolescent smoking prevention are ALERT Project, HSPP, TNT Project, MPP, NC YES. Conclusions: As smoking is often the first step of unhealthy behaviour such as alcohol drinking, illegal drugs, and violence, smoking prevention programmes for adolescents in U.S. have been comprehensive school-based health programs. In smoking prevention programs for adolescents, CDC plays a critical role by supporting survey, research, policy, and funds. The effectiveness of the programs was high when it was based on school and involved parents, community, and mass media. As the effect of each programme is not expected to last for a long time, consistent repetition of these interventions is essential. Current smoking prevention programs for adolescents are exploring the empowerment approach focused on the active involvement of participants rather than traditional approaches using order and discipline.

• Journal of Nutrition and Health
• /
• 제39권4호
• /
• pp.392-402
• /
• 2006

The purpose of this study was to compare the eating habit, food intake frequency and preferred food and taste of juvenile delinquents (100 numbers) and male high school students (100 numbers), using questionnaires from August to October 2004. 1) It was shown that the juvenile delinquents took more unbalanced diet (p<0.05), smoking (p<0.001) and drinking (p<0.001) than general students, while general students had more eating between meals (p<0.01). 2) The intake of food was a significant difference in white rices (p<0.01), bibimbab (p<0.001), kimbab (p<0.001), fried rice (p<0.001), ramen (p<0.001), jajangmyun (p<0.001), jambong (p<0.001), hamburger (p<0.001), pizza (p<0.001) and breads (p<0.05). The juvenile delinquents took more major food than that of general students in all the items except for white rice. It was observed, then, that the juvenile delinquents showed more intake of such subsidiary foods as bulgoki (p<0.001), roasted thin pork chops (p<0.001), grilled pork belly (p<0.001), pork cutlet (p<0.01), sweet and sour pork (p<0.001), chicken with ginseng (p<0.001), fried chicken (p<0.001), kimchi pot stew (p<0.01) and zucchini (p<0.05) than general students, with general students taking more kimchi (p<0.01) and fried or boiled soybean curd (p<0.01). The intake of dessert was a significant difference in yogurt (p<0.01), orange juice (p<0.001), cola (p<0.001), soft drinks (p<0.001), ion drinks (p<0.001), coffee (p<0.001), apple (p<0.01), banana (p<0.001), orange (p<0.001), cake (p<0.001), hot dog (p<0.001), ddokbokgi (p<0.01), mandu (p<0.001), fried fish paste (p<0.05), steamed korean sausage (p<0.001), fried foods (p<0.05), hem & sausage (p<0.001), cheese (p<0.001), ice-cream (p<0.001), candy (p<0.01), chocolate (p<0.001), mayonnaise (p<0.05), jam (p<0.01) and butter & margarine (p<0.01). Then, the juvenile delinquents were shown to entirely have more intake of all the desserts than those of general students. 3) Regarding preference of foods, it was shown that the juvenile delinquents preferred cereals (p<0.05), grilled pork belly (p<0.001), chicken with ginseng (p<0.01), anchovies and small fish (p<0.05), chicken with ginseng (p<0.05), seasoned spinach (p<0.001), seasoned zucchini (p<0.001), milk (p<0.05), coffee (p<0.001) and butter & margarine (p<0.05) while general students did egg (p<0.01), soybean sprout soup (p<0.001), boiled or fried potato (p<0.05), seasoned soybean sprout (p<0.05), boiled or fried soybean curd (p<0.01), fried foods (p<0.01) and snack (p<0.05). For their preference of tastes, hot taste (p<0.01) was higher in the juvenile delinquents. 4) Under general environments there was a change of the difference in their behaviour of pork cutlet (p<0.01) intake in accordance with other family and of milk (p<0.001) and butter & margarine (p<0.05) preference in accordance with growth in a big city between the two groups.

• 농업과학연구
• /
• 제13권2호
• /
• pp.219-226
• /
• 1986

평지(平地), 경사(傾斜) 및 임간초지(林間草地)의 유형(類型)이 가축(家畜)에 의한 목초이용(牧草利用)과 방목(放牧) 및 사회습성(社會習性)에 미치는 영향(影響)을 비교검토(比較檢討)하고자 4년차(年次) 기존(旣存) 혼파초지(混播草地)에서 한우육성빈우(韓牛育成牝牛) 30두(頭)와 재래산양(在來山羊) 5두(頭)를 공시(供試)하여 시험(試驗)한 결과(結果)는 다음과 같다. 1. 재래산양(在來山羊)에 의한 상대섭취빈도(相對攝取頻度)는 평지초지(平地草地)가 35.2%, 경사초지(傾斜草地)가 35.0%, 임간초지(林間草地)가 29.8%이었고, 두당(頭當) 1일(日) 건물섭취량(乾物攝取量)은 평지초지(平地草地)가 462g, 경사초지(傾斜草地)가 459g, 임간초지(林間草地)가 391g이었으며 건물소화율(乾物消化率)은 평지초지(平地草地)가 63.7% 경사초지(傾斜草地) 63.0% 임간초지(林間草地)가 62.1%이었다. 2. 한우(韓牛)에 의한 채식시간(採食時間)은 초지류형(草地類型)에 따라 차이(差異)가 없었으나 반추시간(反芻時間)은 경사초지(傾斜草地)에서 길었고, 임간초지(林間草地)에서 짧았다. 휴식시간(休息時間)은 임간초지(林間草地)에서 길었고 경사초지(傾斜草地)에서 짧았다. 보행시간(步行時間)은 평지초지(平地草地)에서 길었고, 방황시간(彷徨時間)은 임간초지(林間草地)에서 길었다. 반추회수(反芻回數), 식괴당저작회수(食塊當咀嚼回數) 및 배분회수(排糞回數)는 임간초지(林間草地)에서 적었고, 배뇨회수(排尿回數)는 임간초지(林間草地)에서 많았다. 음수인수(飮水因數) 및 음수량(飮水量)은 경사초지(傾斜草地)에서 많았고 보행거리(步行距離)는 경사초지(傾斜草地)에서 길었다. 3. 한우(韓牛)에 의한 사회적(社會的) 거리(距離)는 임간초지(林間草地)가 3.70m, 경사초지(傾斜草地)가 3.56m, 평지초지(平地草地)가 3.41m였고, 두당점유면적(頭當占有面積)은 임간초지(林間草地)가 $14.6m^2$, 평지초기(平地草地)가 $11.9m^2$, 경사초지(傾斜草地)가 $11.0m^2$이었다. 우군형성(牛群形成)은 경사초지(傾斜草地)가 3.7두(頭), 평지초지(平地草地)가 3.6두(頭), 임간초지(林間草地)가 3.4두(頭)이었다. 방목이동순위(放牧移動順位)는 복합적(複合的)인 pear-shaped grazing formation에 가까웠으나 초지유형(草地類型)에 따른 상하(上下) 방목축간(放牧畜間)의 우열관계(優劣管係)는 분명(分明)치 않았다.