• 대한지역사회영양학회지
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• 제13권2호
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• pp.288-297
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• 2008

It has been reported frequently that clinical features of gallstone disease in Korean were similarly changing to those of Occidentals. This changing was thought to be due to Westernized lifestyle and dietary patterns in Korean. The purpose of this study was to investigate the nutritional risk factor among patients with gallstone. The subjects of this study were 90 gallstone group with biliary stone as confirmed by cholecystectomy and 111 control group with no biliary stone as confirmed by ultrasonography adjusted according to age and gender. Anthropometric indices and biomarkers were measured and dietary habit as well as nutrient consumption pattern were investigated using a structured checklist of health-related eating behavior and a semi-quantitative food frequency questionnaire. The mean age was higher in GG (gallbladder stone patient group) than CG (control group). The average BMI and WHR (waisthip ratio) tended to be higher than those in CG. WC (waist circumference) and WHR of women in GG were significantly higher than in CG. GG had lower levels in TC (p < 0.01), LDL-C (p < 0.05), and HDL-C (p < 0.05), but higher FBG levels (p < 0.001). GG tended to be associated with lower physical activity and more frequent consumption of meat, meats with high fat and high sugar content food. The consumption levels of fiber (p < 0.05), vitamin C (p < 0.05), calcium (p < 0.01) in GG were significantly lower than in CG. These findings showed that the association with incidence of gallbladder stone and anthrophometric indices and dietary consumption patterns. Further study may be necessary to elucidate the dietary risk factors in the changing patterns of gallstone disease.

• 분석과학
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• 제26권3호
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• pp.211-221
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• 2013

본 연구는 원주 법천사지에서 출토된 분청사기의 화학조성과 미세조직, 결정상을 X-선형광분석기와 주사전자현미경-에너지분산형엑스선분석기, X-선회절분석기를 이용하여 알아보았다. 태토의 화학성분 분석 결과, 낮은 실리카($RO_2$) 함량과 높은 융제(RO+$R_2O$) 함량임을 알 수 있다. 유약의 경우 융제 성분 중 CaO 함량이 높은 전형적인 석회계열(lime type)과 석회-알칼리 계열(lime-alkali type) 유약을 사용하였으며 태토의 결정상으로는 quarts, mullite, microcline, albite가 확인되었다. 특히 원주 법천사지에서 출토된 분청사기 태토의 화학적 조성은 제겔식을 이용하여 이미 연구된 다른 유적에서 출토된 분청사기와 비교하였으며 화학조성은 서로 상이한 결과를 보였다.

• 한국지하수토양환경학회지:지하수토양환경
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• 제21권2호
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• pp.29-37
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• 2016

CO₂ injection well sealant is vulnerable to supercritical CO₂ (scCO₂) exposure. To develop an alternative to the conventional sealant system (class G cement/class F fly ash), the performance of slag cement (SPC) systems containing class F fly ash (FFA) or class C fly ash (CFA) was evaluated and compared with the conventional sealant under scCO₂ conditions. All sealant systems showed an immediate increase in compressive strength upon scCO₂ exposure and, at 37.6 MPa, SPC/CFA showed the highest compressive strength after 14 days, which was much higher than the 29.8 MPa of the conventional sealant system. Substantial decreases in porosity were observed in all sealant systems, which were partly responsible for the increase in strength. Carbonation reactions led to pH decreases in the tested sealants from 12.5 to 10~11.6. In particular, the greatest decrease in pH in slag cement/class C fly ash probably supported relatively sustainable alkali activation reactions and the integrity of cement hydrates in this system. XRD revealed the presence of CaCO₃ and a decrease in the content of cement hydrates in the tested sealants upon scCO₂ exposure. TGA demonstrated a greater increase of CaCO₃ and calcium-silicate-hydrate phases in SPC/CFA than in the conventional sealant upon scCO₂ exposure.

• Toxicological Research
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• 제12권1호
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• pp.69-79
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• 1996

Primary culture of cerebellar neuronal cells derived from 8-day old Long-Evans rats was used. Pure granule cells, astrocytes or mixed cells culture systems were prepared. These cells were differentiated and developed synaptic connections. And the astrocytes were identified by immunostaining with glial fibrillary acidic protein (GFAP). Methamphetamine (MAP), which acts on dopaminergic system and cadmium (Cd), a toxic heavy metal, were applied and biochemical assays and electrophysiological studies were performed. $LC_50$ values estimated by MTT assay of MAP and Cd were 3 mM and 2$\mu M$ respectively. Cells were treated with 1 mM or 2 mM MAP and 1$\mu M$ $CdCl_2$ for 48 hour, and the incubation media were analyzed for the content of released LDH. MAP (2 mM) and Cd significantly increased the LDH release. Cell viability was decreased in both groups and some cytopathological changes like cell swelling or vacuolization were seen. The cerebellar granule cells were used for measuring membrane currents using whole-cell clamp technique. Sodium and potassium currents were not affected by MAP neither Cd, but calcium current was significantly reduced by Cd but not affected by MAP. Therefore, in vitro neurotoxicity test system using neuronaI cells and astrocytes cultures were established and can be used in screening of potential neurotoxic chemicals.

• 공업화학
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• 제25권1호
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• pp.58-65
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• 2014

본 연구에서는 국내 4개 화력발전소에서 발생되는 석탄 바닥재를 이용하여 유황 고형화 성형물을 제작하였으며, 이를 이용하여 산업용 건자재 제조를 위한 실용적 데이터에 대하여 고찰하였다. 이러한 유황 고형화 성형물 제조를 위하여, 일축 스크류 형태의 연속식 혼합기를 사용하였다. 또한, 혼합기의 운전 특성으로 인하여, 1.2 mm 이하의 잔골재로서 석탄 바닥재가 사용되었다. 15, 20, 25, 30 wt%의 다양한 유황 농도의 성형물을 제조되었을 때, 압축강도 특성이 분석 되었다. 그리고 높은 생석회 함량의 석탄 바닥재가 사용되었을 때, 시제품에서 균열이 발생하였고 침투액의 pH가 12 이상을 나타내었다. 이러한 실험 결과들은 석탄 바닥재의 재활용 기술에 효과적으로 활용될 수 있을 것이다.

• 생태와환경
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• 제37권3호통권108호
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• pp.313-318
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• 2004

Di-2-ethylhexyl Phthalate (DEHP)는 내분비장애물질로 분류되어 있는 플라스틱 가소제로서 in vitro에서 혈구세포막에 영향을 주는 것으로 알려져 있다. 본 연구는 동자개, Pseudobagrus fulvidraco를 대상으로 DEHP 급성 노출에 따른 혈액학적 영향을 파악하기위하여 어체중 당 300 및 1,000 mg의 DEHP를 복강주사하였다. DEHP (1,000 mg b.w. $^{-1}$에 노출된 동자개는 적혈구수와 혈색소 농도 및 적혈구 용적이 감소하는 경향을 나타내었다. 또한, 혈청 내 유기성분인 총단백질량, 콜레스테를 수치는 300 및 1,000 mg 주사구에서 유의적으로 감소하였으며 지방산의 농도는 1,000 mg 주사구에서 대조구와 비교하여 유의적으로 감소하였다. 혈청 무기성분인 칼슘농도와 혈액 삼투압 농도는 1,000 mg DEHP 노출구에서 유의적인 감소가 관찰되었다.

• 한국축산식품학회지
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• 제30권3호
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• pp.443-448
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• 2010

유제품, 김치 및 신생아 분변 등에서 유산균을 분리하여 우유 casein을 분해시켜 배양상등액에 존재하는 serine의 함량을 측정함으로써 간접적으로 CPP 생산을 평가하였다. CPP 생산 능력은 OPA방법으로 측정했을 때 E. faecalis A-2 균주가 1.244 mg/mL로 가장 많은 peptide를 생산 하였다. 본 실험에 사용된 유산균의 경우, 세포내 효소와 세포외 효소로 각각 나누어 proteolytic 활성을 평가한 결과 세포내 효소에 의한 proteolytic 활성은 E. faecalis A-6 균주가 가장 높은 것으로 나타났으며, 세포외 효소에 의한 proteolytic 활성은 L. plantarum A-14 균주에서 가장 높게 나타났다. 가용성 칼슘함량은 Leuconostoc mesenteroides A-1(11 mg/dL), E. durans A-16(10.481 mg/dL), 그리고 L. planatarum A-3(10.356 mg/dL) 균주의 경우에는 대조구보다 높은 유리 칼슘함량을 나타내었다. 따라서 이러한 유산균을 이용한다면 소장 내에서 칼슘 흡수를 극대화시킬수 있는 장점이 있어 이들 유산균을 이용한 고칼슘 제품 개발이 가능할 것이다.

• 한국식생활문화학회지
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• 제11권5호
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• pp.635-641
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• 1996

As a basic study for preparing pine sprout tea, chemical components in pine sprouts and pine needles were analyzed as follows: In proximate composition the contents of most components except for crude fat were different between in pine sprouts and pine needles. Moisture content in pine sprouts was higher than that in pine needles. Calcium and potassium were major minerals contained in pine sprouts and needles, and their contents in pine needles picked in December were higher than those picked in June. Soluble tannin and vitamin C contents in leaf part of pine sprouts were much higher than those in stem part and their contents in pine needles were increased according to their growth. Free sugars like fructose, glucose and sucrose were contained in both pine sprouts and needles, and their contents in pine sprouts were higher in stem part as compared that in leaf part. Although fourteen kinds of amino acids were detected in pine sprouts and pine needles, their contents were extremely low. Amino acid composition between pine sprouts and pine needles was different each other, but major amino acids contained in them were same, those are acidic amino acids such as aspartic acid and glutamic acid. Amino acid contents in pine needles were increased according to the growth. In fatty acid composition in leaf part of pine sprouts, saturated fatty acid contents were higher than unsaturated fatty acid contents, but in stem part unsaturated fatty acid contents were higher. In pine needles the amount of saturated fatty acid was increased with the growth, but the amount of unsaturated fatty acid was rather decreased.

• Journal of Community Nutrition
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• 제3권1호
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• pp.14-20
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• 2001

A cross-sectional study to determine dietary intake and plasma triglyceride total cholesterol LDL-cholesterol and HDL-cholesterol of 185K Korean men was conducted across three different age groups The younger group (age 21 to 34) was significantly (p<0.001) taller but showed lower (p<0.05) percent body fat than the older group (age 45 to 60) Weight and body mass index was not different among age groups. Older men showed significantly(p<0.01) lower energy and total fat intake than younger men Besides macronutrients, most participants consumed an adequate amount of micronutrients but calcium consumption of the middle age group (age 35 to 44) was less than 75% of RDA In older men plasma triglyceride(207.8$\pm$155.5 mg/dl) total cholesterol (201.4$\pm$40.0 mg/dl) and LDL-cholesterol(106.0$\pm$32.7 mg/dl) concentrations were significantly hight(p<0.001) than in younger men wereas no significant difference was observed in HDL-cholesterol concentration Subjects with a higher BMI(bMI$\geq$25.0) showed significantly higher (p<0.001) triglyceride(200.2$\pm$107.6 mg/dl) total cholesterol(211.0$\pm$40.1 mg/dl) LDC-cholesterol(118.16$\pm$35.5 mg/dl) concentrations and lower(p=0.001) HCL-cholesterol concentration (52.8$\pm$15.9 mg/dl) than subjects with lower BMI(BMI<23.0) Dietary intake of fat cholesterol did not show significant associations with any of the plasma lipid profiles. However, anima fat intake was significantly (p<0.05) correlated with plasma total cholesterol and triglyceride concentrations in the older age group. On the hand percent body fat was correlated (p<0.05) with all of the plasma lipid and lipoprotin concentrations examined for all age groups Results indicate both dietary intake and percent body fat are important determinants of the plasma lipid concentrations is the elderly but only percent body fat or body mass could be valid predictors for the plasma lipid concentrations of the younger age group.

• Journal of Nutrition and Health
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• 제38권6호
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• pp.455-464
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• 2005

The study was designed to observe the correlation between the eating habits and growth development in 1,574 children (3-6 years old) in Kyunggi-do and Seoul, Korea. The eating habits and nutrient intake were determined by mini dietary assessment and food frequency questionnaire (FFQ). 35.6% children had been practicing an unbalanced diets. Children with unbalanced diet consumed less amount of protein source foods (meat, fish, egg, soy products), vegetables and fruits and had irregular meal time, but more of them preferred sweet foods (ice creme, cookies) and carbonated drinks as snack compared with children in balanced diet. 24-35% children consumed energy, iron (Fe), calcium (Ca), Niacin, Zinc (Zn) less than 75% RDA. Energy intake of children with unbalanced diet was not significantly different from those with balanced diet, but they consumed less amount of niacin, Fe, Ca and Zn than those with balanced diet. By using the relative percentage of standard weight-length-index (WLI), 65.7% children was normal weight, 12.9% was underweight, 13.4% was overweight and 7.9% was obese. However, 11.9% of underweight and normal weight children was so called thin obese since their body fat content was greater than 20%. There were 16.8% underweight in children with unbalanced diet and 12.6% underweight in those with balanced diet. Compared to normal weight, the underweight children significantly consumed less amount of milk and its product, high protein foods, fried foods and fruits, but obese children consumed more high protein source foods (meat, fish, egg, etc) and sweet foods. In conclusion, the eating habits of unbalanced meal was prevalent problem in preschool children which resulting in their health risks. Therefore, it would be needed that new approach for nutrition education to improve eating habits in preschoolers.