The silver nanoparticles (AgNPs) incorporated reverse osmosis (RO) membranes with an excellent antibacterial property has been reported. However, the incorporated AgNPs could increase the hydraulic resistance of membrane, indicating the decline of water flux. Here, hybrid silver nanoparticles (Ag@SiO2, 400 nm) were strongly immobilized using Ag-S chemical bonding on the polyamide surface of RO membrane for both protecting the decline membrane performance and having a strong antimicrobial property. The membrane performance was unchanged after the immobilization of silver nanoparticles, when compared to that of unmodified membrane. In addition, the silver-polyamide composite membrane significant reduced the number of live bacteria attached on the membrane surface by 92.7 ± 1.8, 99.5 ± 0.3, and 73.3 ± 5.5% for E. coli, P. aeruginosa, and S. aureus, respectively. The strong antimicrobial property is ascribed to the combination effect by the directly attachment to bacteria surface and the penetration of released silver ions inside the cell membrane of bacteria.

This study was carried out to make functional laver added with sericulture powder which have a effect of prevention adult diseases such as diabetes mellitus, hypertention, and obesity. In our lab. a lot of study have been performed about functional effect of sericulture(mulberry leaf, silkpeptide and silkworm) for examples decrease of serum cholesterol, triacylglyceride and control of serum glucose in rat. sericulture powder was prepared by pulverizing freeze-dried. Functional laver samples were prepared, and the sensory evaluation quality, physical characteristics and mineral contents of those were compared. In case of overal quality of sensory evaluation, silkpeptide powder laver was lower than other samples. The content of moisture of functional laver added with sericulture powder samples(control, sample 1, 2, 3) were 0.30, 0.98, 0.24 and 0.28%, respectively. The content of crude protein of functional laver added with sericulture powder samples were 40.50, 44.10, 56.75, and 62.50%, respectively. The content of crude fat of functional laver added with sericulture powder samples were 4.00, 4.10, 4.00 and 4.40%, respectively. The content of ash of functional Laver added with sericulture powder samples were 7.07, 7.53, 7.60 and 7.27%, respectively. The content of calcium of functional laver added with sericulture powder samples were 219, 253, 224 and 229mg/100g, respectively. The content of potassium of functional laver added with sericulture powder samples were 1879, 1919, 1890 and 1907mg/l00g, respectively. The content of iron of functional laver added with sericulture powder samples were 18.03, 18.23, 18.46 and 18.53mg/100g, respectively. The content of zinc of functional laver added with sericulture powder samples were 1.86, 4.47, 4.57 and 5.64mg/100g, respectively. The content of manganese of functional laver added with sericulture powder samples were 4.50, 8.50, 7.00 and 6.00 mg/100g, respectively. It was concluded that this functional laver added with sericulture powder is low calorie, high protein and high mineral health food which have a preventive effect of adult disease.

Food habit, eating-out pattern, smoking and drinking habits of 814 elderly (aged over 60) living in Incheon were surveyed by questionnaire. The ratio of the elderly who have balanced meals at moderate amount was slightly higher in urban area. Urban elderly tended to have mild foods, while rural elderly preferred hot and salty foods. Score for food habit was higher in urban elderly and there was no difference between male and female elderly. Most urban elderly had their meal at the public facilities for elderly, while most rural elderly used general restaurant and public room for elderly. Korean foods were the most favorite menu when ate out. Ratio of elderly who have difficulties in chewing was 21.2 and 39.6% for urban and rural elderly, respectively. Many elderly, especially more than 70% of female elderly, prepared the meals for themselves. Rural elderly smoked and drank more than urban elderly and male elderly did more than female elderly.

Preferences of 814 elderly living in Incheon for dishes, food materials and cooking methods were investigated. The survey was conducted from Dec. 2000 to Jan. 2001 by questionnaires. Subjects preferred cooked rice with beans, kalkooksoo(hot noodle), gomtang(soup with beef), bibimbap(rice with assorted mixture) to other staple dishes. However, preference for hashed rice or curried rice was very low. More than 50% of the subjects liked soybean paste soup and stew, and the ratio of elderly who liked Chinese cabbage kimchi was 68.7%. There was no significant difference in preference for pan-fried foods according to food materials in them. Subjects liked injolmi(waxy rice cake), shikhye(fermented rice drink) and coffee the most. Most subjects preferred plant foods like vegetables, legumes and seaweeds to animal foods. Preference of elderly for milk and yoghurt was reatively high; however, that for ham, butter and cheese was low. Elderly in Incheon liked roasted beef, beef soup and roasted pork the most. Chicken was preferred when it was boiled in water with garlic, ginseng, and so on. Cooked and seasoned vegetables (Namul) were the most preferred type by elderly. Preferences for dishes and food materials were more affected by living places of the subjects than by sex, and the reverse was true in preference for cooking method of food materials.

To compare actual obesity rate and self-evaluated body shape, 651 women living in Inchon were participated in the measurement of anthropometric indices and in the survey by questionnaire. Mean RBW and BMI were in normal range except the girl in 13-15 years. RBW and BMI of the women in 40s and 50s were significantly higher than those in women in younger ages(p<0.001). Triceps skinfold thickness of the subjects were not significantly different. Significantly low DRBW in teenagers and women in 20s showed that their desire to reduce body weight were very strong. Over the half of the subjects thought they were too heavy and unsatisfied at their body shapes. The parts of the body desired to remove extra fat were the waist & abdomen in women over 30s and the thigh & legs in teenagers. It is thought that women, especially in 10s and 20s need the education about the appropriate evaluation of body shape and also need the nutrition education about the deteriorated influence of underweight on health.

The status of general food service administration and nutrition education was investigated in 111 elementary schools located in Inchon Metropolitan Area by questionnaires. The results are as follows ; 1. Most schools served 5 lunches per week. Meal cost per capita was 1212.1 won in urban type school and 979.0 won in rural type school. Most schools(91.9%) had 1 regular dietitian and 1 regular cook. With increasing number of students the number of temporary employees increased significantly. Most school dietitians(86.5%) were in their twenties and had 2 year careers. 2. Most dietitians(90.1%) planned the menu based on the RDA with the first consideration in nutritional needs of the students. Many dietitians(81.8%) surveyed on the food preferences of the students at least once a year. About 86% of the schools had the food service committee which was helpful. Dietitians were the first one in charge of food purchasing and checking, and sometimes a manager in general school affairs worked together. One third of the schools used the volunteer parents in food services. 3. Most school dietitians(97.2%) gave the students nutrition education using handouts once a week. However, they could not teach the students through the classroom lecture because they are not the regular teachers. Food garbages were removed by the professional trash collecting company or by using fermentation machines or by giving them to animals as feeds. School events concerning the food and nutrition were mostly drawing pictures and composition. Only 36.4% of the school dietitians had experienced in nutrition counseling for an individual student. Most of them(99.1%) thought that individual counseling is necessary if they have enough time and chances to do.

균일하고 치밀한 미세구조를 갖는 Pd박막이 PdCl2를 사용하는 전기도금방법으로 제조되었다. 본 연구에서는 도금온도와 전류밀도가 주요 공정변수로서 고려되었고 이에 따른 음극효율 및 제조된 Pd도금막의 결정성, 형상 및 경도 등의 특성이 측정되었고, 이들간의 상호관계성이 검토되었다. 연구결과에 따르면, PdCl2를 사용하는 본 Pd전기도금 시스템에서는 50˚C와 5mA/cm2의 조건이 도금막의 형상으로 볼 때, 최적의 도금조건이라고 간주된다. 최적 조건에서 제조된 Pd도금막의 경도는 약 600kg/mm2이었다. 변수 및 특성간의 관계성 검토 결과, Pd막의 경도는 미세구조에 의해 큰 영향을 받지만, 결정의 배향성과의 연관성은 작은 것으로 해석된다.

Perception and knowledge on the diet among 651 women living in Inchon were surveyed by questionnaires in March through May, 1998. Respondents consisted of middle school girls(12.3%), high school girls(16.4%), and women in twenties(16.4%), thirties(18.9%), forties(15.7%) and fifties and over(20.3%). Ratio of high school graduates was the highest(37.0%) among respondents, and there was a tendency of less education with ages. Seventy-six percent of women practised the diet for the self-satisfaction of a nice figure, 20% for healing diseases, and 3.4% for attracting boy friends' or husbands' attention. The purpose of the diet was significantly different with ages(p<0.01). The diet methods which the respondents perceived effective and wanted to practise were exercise and food therapy. Average score of the knowledge on the diet was 8.27 out of 10, and significantly different with ages and education(p<0.05). Twenties showed the highest score and high school girls, thirties, middle school girls, forties and fifties and over were followed in decreasing order. Also the score was in decreasing order of graduates of college, high, elementary and middle school.