• Animal Bioscience
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• 제34권4호
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• pp.539-545
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• 2021

Objective: Endometritis is a major disease, that causes infertility in cattle, and is usually categorized as clinical or subclinical endometritis (SCE). The nutritional condition during the dry period is important for recovery after the last stage of the lactation period, and for postpartum production and reproduction. This study aimed to clarify the relationship between nutritional and metabolic characteristics in the dry period, and the risk of postpartum SCE. Methods: Multiparous Holstein dairy cows (n = 25, raised in a tied stall) were used. Endometrial cytological analysis was performed around 30 days post-partum, with 5% to 14% polymorphonuclear (PMN) as a cut-off point to define SCE. Serum levels of glucose, non-esterified fatty acids, β-hydroxybutyric acid (BHBA), blood urea nitrogen, total cholesterol, aspartate aminotransferase, γ-glutamyl transpeptidase, calcium, phosphorus, and magnesium were measured in the cows at the dry period to evaluate energy status, protein metabolism, and mineral metabolism. Results: The incidence of SCE in the cows was 60.0% (n = 15/25) and the mean PMN% in postpartum cows diagnosed as SCE was 8.05%±2.6%. Overall, 17 and 8 samples were collected from the cows in the far-off and close-up periods, respectively. The serum concentration of BHBA in the far-off period and serum glucose concentration in the closeup period were correlated with postpartum PMN% (r = 0.62, p<0.01; r = -0.74, p<0.05, respectively). Serum levels of calcium and magnesium in the dry period were associated with the incidence of postpartum SCE (healthy vs SCE cows, p<0.05). Conclusion: Blood levels of glucose, BHBA, calcium, and magnesium in dry periods could be useful parameters for predicting the risk of postpartum SCE. The present study also suggests that management in the close-up period is essential for promoting recovery from calving fatigue.

• 한국물환경학회지
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• 제23권1호
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• pp.161-168
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• 2007

The main aim of this work is focus on the Geum river water quality evaluation of pollution data obtained by monitoring measurement during the period 2001-2005. The complex data matrix 19 (entire monitoring stations)*13 (parameters), 60 (month)*13 (parameters) and 20 (season)*13 (parameters) were treated with different multivariate techniques such as factor analysis/principal component analysis (FA/PCA). FA/PCA identified two factor (19*13) classified pollutant Loading factor (BOD, COD, pH, Cond, T-N, T-P, $NH_3$-N, $NO_3$-N, $PO_4$-P, Chl-a), seasonal factor (water temp, SS) and three Factor (60*13, 20*13) classified pollutant Loading factor (BOD, COD, Cond, T-N, T-P, $NH_3$-N, $NO_3$-N, $PO_4$-P), seasonal factor (water temp, SS) and metabolic factor (Chl-a, pH). Loadings of pollutant factor is potent influence main factor in the Geum river which is explained by loadings of pollutant factor at whole sampling stations (71.16%), month (52.75%) and season (56.57%) of main water quality stations. Result of this study is that pollutant loading factor is affected at Gongju 1, 2, Buyeo 1, 2, Gangkyeong, Yeongi stations by entire stations and entire month (Gongju 1, Cheongwon stations), April, May, July and August (buyeo 1) by month. Also the pollutant Loading factor is season gives an influence in winter (Gongju 1, buyeo 1) from main sampling stations, but Cheongwon characteristic is non-seasonal influenced. This study presents necessity and usefulness of multivariate statistic techniques for evaluation and interpretation of large complex data set with a view to get better information data effective management of water sources.

• Safety and Health at Work
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• 제9권2호
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• pp.149-158
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• 2018

Background: Work comfort studies have been extensively conducted, especially in the underground and meteorological fields resulting in an avalanche of recommendations for their evaluation. Nevertheless, no known or universally accepted model for comprehensively assessing the thermal work condition of the underground mine environment is currently available. Current literature presents several methods and techniques, but none of these can expansively assess the underground mine environment since most methods consider only one or a few defined factors and neglect others. Some are specifically formulated for the built and meteorological climates, thus making them unsuitable to accurately assess the climatic conditions in underground development and production workings. Methods: This paper presents a series of sensitivity analyses to assess the impact of environmental parameters and metabolic rate on the thermal comfort for underground mining applications. An approach was developed in the form of a "comfort model" which applied comfort parameters to extensively assess the climatic conditions in the deep, hot, and humid underground mines. Results: Simulation analysis predicted comfort limits in the form of required sweat rate and maximum skin wettedness. Tolerable worker exposure times to minimize thermal strain due to dehydration are predicted. Conclusion: The analysis determined the optimal air velocity for thermal comfort to be 1.5 m/s. The results also identified humidity to contribute more to deviations from thermal comfort than other comfort parameters. It is expected that this new approach will significantly help in managing heat stress issues in underground mines and thus improve productivity, safety, and health.

• 대한수의학회지
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• 제25권2호
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• pp.133-144
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• 1985

The changes of acid-base status in vitro of the venous blood for 24 hours in ten Korean native goat were investigated. The acid-base parameters were measured within ten minutes after collection of the blood, and every hour during the first six hours and finally after twenty four hours of storage. Blood samples were stored at two different temperatures ($0-4^{\circ}C$ and $21-24^{\circ}C$). Twelve goats were induced acute acid-base disturbances by intravenous infusion of either hydrochloric acid or sodium bicarbonate and inhalated with $CO_2$ gas mixture (20% $CO_2$, 80% $O_2$) or hyperventilation were performed by means of respirator. The results were as follows; 1. Blood samples could be stored during the first two hours in ice water ($0-4^{\circ}C$) and one hour at room temperature without significant changes in pH. The magnitudes of changes were similar to those of cow, and lower than those of men and dogs. 2. The mean values of acid-base parameters in normal goat were arterial pH, 7.40; $P_{CO_2}$, 35.4mmHg; $HCO_3{^-}$, 21.8mEq/L. 3. Both the base excess and the bicarbonate showed high correlation (r=0.99) during the metabolic disturbance and were represented as $B.E.=1.38\;HCO^-{_3}-29.7$. 4. The slope of blood buffer curve obtained from the in vivo experiment was 16.3mEq/L/pH. 5. The magnitudes of changes in hydrogen ion concentration per unit change of $P_{CO_2}$ were 0.8nM/mmHg in hypercapnia and 1.0nM/mmHg in hypocapnia. 6. The ranges of acid-base parameters in normal goat urine were pH, 6.0-8.1; $P_{CO_2}$, 42-61mmHg; $HCO_3{^-}$, 2-110mEq/L. The concentration of potassium was higher (60-200mEq/L), and that of sodium was lower (8-70mEq/L) than those of human urine.

• Clinical and Experimental Reproductive Medicine
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• 제48권4호
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• pp.374-379
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• 2021

Objective: We aimed to evaluate associations between the ratio of serum estrone (E1) to estradiol (E2) and parameters related to serum glucose metabolism and insulin resistance in women with polycystic ovary syndrome (PCOS). Methods: In total, 133 women between the ages of 18 and 35 diagnosed with PCOS were enrolled in this study. All participants with PCOS underwent blood tests to determine hormonal and biochemical metabolic parameters and a standard 2-hour 75-g oral glucose tolerance test. They were divided into two groups according to the serum E1-to-E2 ratio: group 1 (E1/E2 ratio <2.0) and group 2 (E1/E2 ratio ≥2.0). Results: In the comparative analysis, the waist-to-hip ratio (WHR) was the only clinical variable that was significantly different between the two groups. Patients with a higher E1/E2 ratio showed higher fasting insulin levels, homeostasis model for insulin resistance, and postprandial glucose level at 2 hours (PPG2). In a correlation analysis, only PPG2 was significantly related to the serum E1/E2 ratio. However, after controlling for the confounding effects of body mass index (BMI) and WHR, fasting glucose was also significantly correlated with the serum E1/E2 ratio. Conclusion: Women with PCOS with a higher serum E1/E2 ratio were found to be more likely to show higher fasting insulin and postprandial glucose levels. Significant correlations were found between the serum E1/E2 ratio and both fasting and postprandial serum glucose levels after adjusting for BMI and WHR in women with PCOS.

• 대한본초학회지
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• 제34권2호
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• pp.49-58
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• 2019

Objectives : Obesity is a public health concern associated with chronic diseases including hyperlipidemia, diabetes, fatty liver, atherosclerosis and cancer. As several anti-obesity drugs have been limited owing to their side effects, the development of new anti-obesity drugs through herbal medicines has been increasing. Cynanchum Wilfordii Radix (CW) traditionally is consumed for various health benefits including immune enhancing, anti-inflammation and anti-tumor activities. The aim of the present study is to evaluate the effects of CW on High fat diet (HFD)-induced obese mice. Methods : The mice were randomly divided into four groups (n=7). The mice were respectively fed a normal diet (ND), a high-fat diet (HFD), HFD plus CW (50 mg/kg/day), HFD plus CW (100 mg/kg/day). All groups were assayed for body weights, food efficiency ratio, blood biochemistry parameters, and organic tissue weights. Results : HFD-fed mice showed an increase in the body weight and serum biochemistry parameters levels (total cholesterol and triglycerides) as well as organic tissue weights. However, the administration of CW to obese mice induced a reduction in their body weight, food efficiency ratio, blood biochemistry parameters and weight of liver and fat compared with the HFD fed mice. Additionally, we observed that CW inhibited the lipid accumulation in liver and serum lipid parameter induced by HFD. Conclusions : Taken together, the findings of this study suggest that CW may be a potential agent for use in the treatment of obesity and obesity-related metabolic diseases.

• 한국식품영양과학회지
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• 제36권3호
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• pp.311-317
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• 2007

본 연구에서는 대사증후군의 예방과 관리를 위한 식사지침을 마련하기 위한 기초자료를 제시하고자 일부 성인을 대상으로 NCEP-ATP Ⅲ와 WHO 아시아태평양 비만 기준에 의해 대사증후군 성인을 분류한 후 영양소섭취상태와 혈액성상을 살펴보았으며, 그 결과를 요약하면 다음과 같다. 대사증후군 대상자의 평균 연령, 신장, 체중 및 체질량지수는 각각 58.8세, 158.0 cm, 66.3 kg, $26.5\;kg/m^{2}$이었으며, 대조군은 각각 58.4세, 158.9 cm, 59.6 kg, $23.5\;kg/m^{2}$로 대사증후군 대상자의 체중과 체질량지수가 대조군보다 유의하게 높았다(p<0.001, p<0.001). 총 식품섭취량은 대사증후군 대상자와 대조군이 각각 1063.8 g과 1183.4 g으로 유의한 차이가 없었다. 각 식품군별 섭취량도 두 군 간에 유의한 차이가 없었다. 남자 대상자의 경우 대사증후군 대상자의 버섯류 섭취는 대조군보다 유의적으로 높은 반면(p<0.05), 난류 섭취량은 대조군보다 유의하게 낮았다(p<0.01). 또한 여자 대상자의 경우 대사증후군 대상자의 채소류 섭취가 대조군보다 유의하게 낮았다(p<0.05). 에너지 섭취량은 대사증후군 대상자가 1527.9 kcal, 대조군이 1578.9 kcal로 유의한 차이가 없었으며, 그 밖의 영양소 섭취량도 두 군 간에 유의한 차이가 없었다. 여자 대상자의 경우 대사증후군 대상자의 식이섬유 섭취량이 대조군보다 유의하게 낮았다(p<0.05). 대사증후군 진단기준으로 사용한 혈청 HDL-콜레스테롤, 중성지질, 혈당 및 혈압은 대사증후군 대상자가 각각 39.9 mg/dL, 183.9 mg/dL, 126.6 mg/dL, 138.1/78.8 mmHg로 대조군의 45.8 mg/dL, 125.5 mg/dL, 93.6 mg/dL, 120.8/72.8 mmHg와 비교할 때 HDL-콜레스테롤은 유의하게 낮고 나머지는 유의하게 높았다(p<0.001, p<0.001, p<0.001, p< 0.001, p<0.001). 혈청 GPT, 동맥경화지수, 백혈구수는 대사증후군 대상자가 각각 27.8 IU/L, 3.7, $5964.2\;{\mu}/L$로 대조군의 22.6 IU/L, 3.2, $5250.0\;{\mu}/L$보다 유의하게 높았다(p<0.01, p<0.001, p<0.01). 이상의 결과를 종합할 때 대사증후군의 여성 대상자의 경우 섬유소 및 채소류의 섭취가 정상 성인보다 낮게 나타나, 이들 식품 및 영양소의 섭취가 대사증후군의 증상에 도움이 될 수 있음이 제시되어 이러한 결과는 대사증후군의 예방과 관리를 위한 식사지침을 마련하기 위한 기초자료로서 활용될 수 있을 것으로 사료된다. 또한 대사증후군 대상자의 혈청 GPT와 동맥경화지수가 정상 성인보다 유의하게 높게 나타나, 본 연구를 기초로 하여 향후 염증과 군집으로서의 대사증후군과의 관계를 밝히는 연구를 수행하는 것이 필요하다고 생각한다.

• Pediatric Gastroenterology, Hepatology & Nutrition
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• 제9권1호
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• pp.48-57
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• 2006

목 적: 연구자는 adipocytokine의 일종인 leptin, adiponectin과 leptin/adiponectin 비를 이용하여 비만아에서 신체 계측치와 인슐린, 지질 농도와의 상관관계를 알아보고자 한다. 방 법: 2005년 1월부터 2005년 6월까지 조선대학교병원 소아과에 방문한 BMI 95백분위수 이상인 7~15세 사이의 비만군 25명(남: 20명, 여: 5명)과 정상 체중 아동인 대조군 25명(남: 20명, 여: 5명)을 대상으로 하였다. 신체 계측(신장, 체중, 팔둘레, 피부주름두께, 체지방률)을 시행하고 공복상태에서 채혈하여 adiponectin, leptin과 혈당, 인슐린, 지질 농도를 측정하였다. 통계는 Student t-test와 Pearson's correlation coefficient 분석법을 이용하였다. 결 과: 비만군에서 대조군에 비해 체질량 지수, 체지방률, 팔둘레, 삼두박근 피부주름두께 및 견갑골하 피부주름두께가 대조군에 비해 유의하게 높았고, 인슐린 농도($17.9{\pm}15.6{\mu}U/mL$ vs $6.5{\pm}2.7{\mu}U/mL$, p<0.05)는 유의하게 높았으며 고밀도 지질 단백 콜레스테롤($50.0{\pm}12.4mg/dL$ vs $68.9{\pm}15.9mg/dL$, p<0.005)은 유의하게 낮았다. Leptin은 비만군에서 $10.6{\pm}5.1ng/mL$로 대조군에 비해 유의하게 높았고(p<0.001), adiponectin은 비만군에서 $2.85{\pm}0.7{\mu}g/mL$로 유의하게 낮았다.(p<0.05). 비만군에서 leptin은 체질량지수, 체지방률과 유의한 양의 상관관계를 보였고 adiponectin은 체질량지수, 체지방률과 유의한 음의 상관관계가 있었다. 대조군에서 leptin은 유의한 상관관계를 보인 인자가 없었으나, adiponectin은 인슐린과 유의한 양의 상관관계가 있었다. Leptin/adiponectin 비는 비만군에서 대조군에 비해 유의하게 높았고($4.03{\pm}2.8$ vs $1.53{\pm}0.74$, p<0.01), 비만군에서는 체지방률, leptin과 유의한 양의 상관관계가 있었으나 대조군에서는 체질량지수 및 체지방률과 유의한 양의 상관관계가 있었다. 결 론: 소아비만에서 leptin과 adiponectin은 비만지표들과 유의한 연관성이 있었음에도 불구하고, 대사장애를 나타내는 인자들과는 연관성이 없었다. Leptin/adiponectin 비는 비만군에서 대조군에 비해 유의하게 높았고, 비만군뿐만 아니라 대조군에서도 비만지표들과 유의한 상관관계가 있었다.

• Nutrition Research and Practice
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• 제9권2호
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• pp.137-143
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• 2015

BACKGROUND/OBJECTIVES: Mulberry leaves contain quercetin derivatives, which have the effects of reducing obesity and improving lipid and glucose metabolism in mice with obesity. It is not clear whether or not mulberry leaves can directly affect metabolic disorders, in the presence of obesity, because of the interaction between obesity and metabolic disorders. The aim of the current study was to assess the direct action of quercetin derivatives on metabolic disorders in non-obese conditions in short-term high-fat diet fed mice. MATERIALS/METHODS: C57BL/6N mice were fed a high-fat diet, supplemented with either 0% (control), 1%, or 3% mulberry leaf powder (Mul) or 1% catechin powder for five days. Anthropometric parameters and blood biochemistry were determined, and hepatic gene expression associated with lipid and glucose metabolism was analyzed. RESULTS: Body and white fat weights did not differ among the four groups. Plasma triglycerides, total cholesterol, and free fatty acids in the 1%, 3% Mul and catechin groups did not differ significantly from those of the controls, however, plasma glucose and 8-isoprostane levels were significantly reduced. Liver gene expression of gp91phox, a main component of NADPH oxidase, was significantly down-regulated, and PPAR-${\alpha}$, related to ${\beta}$-oxidation, was significantly up-regulated. FAS and GPAT, involved in lipid metabolism, were significantly down-regulated, and Ehhadh was significantly up-regulated. Glucose-metabolism related genes, L-PK and G6Pase, were significantly down-regulated, while GK was significantly up-regulated in the two Mul groups compared to the control group. CONCLUSIONS: Our results suggest that the Mul quercetin derivatives can directly improve lipid and glucose metabolism by reducing oxidative stress and enhancing ${\beta}$-oxidation. The 1% Mul and 1% catechin groups had similar levels of polyphenol compound intake ($0.4{\times}10^{-5}$ vs $0.4{\times}10^{-5}$ mole/5 days) and exhibited similar effects, but neither showed dose-dependent effects on lipid and glucose metabolism or oxidative stress.

• 미생물학회지
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• 제45권1호
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• pp.32-40
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• 2009

수변 낙엽퇴적층에서 호열성 세균의 분포와 물질분해 양상을 파악하기 위하여, 호열성 세균을 분리하고 그 특성을 조사하였다. 고분자 유기물의 분해력이 높고 $60^{\circ}C$에서 생장하는 균주들을 탐색한 결과, 10개의 균주가 선별되었다. 16S rRNA 유전자 염기서열을 결정하고 계통분석한 결과, 모두 Geobacillus 속으로 동정되었다. 균주들의 최적 성장온도는 $55^{\circ}C$와 $60^{\circ}C$, 최적 pH는 초기 pH가 6.0${\sim}$8.0일 때로 나타났으며, 염분 3%일 때를 기준으로 성장속도의 저해가 뚜렷하게 나타났다. 균주의 효소 활성도와 API 50 CHB kit에 의한 탄수화물 이용도를 바탕으로 균주의 생태학적 기능을 알아본 결과, G. stearothermophilus 균주들과 G. kaustophilus 균주들의 특성은 다른 종의 균주들과 명확히 구분되었으며, 나머지 균주들은 최적 성장환경의 생태학적 특징이 다양하게 나타나, 종별 구분과 정확히 일치하지는 않았다. 약산성 환경에서 최적 성장하는 G. stearothermophilus 균주들은 높은 단백질분해효소활성을 보이면서 다당류 분해와 단당류 이용도가 낮았고, 알칼리환경을 최적 서식지로 하는 G. kaustophilus 등은 이와 대조적으로 지질 분해 및 당류의 이용도가 높게 나타났다. 따라서, 수변 낙엽퇴적층에는 호열성 내성포자 형성 세균인 Geobacillus 속 균주들이 다양한 생태학적 지위를 가지며 퇴비화와 유사한 천이과정을 거치면서 수변 퇴적물질을 분해하는데 기여하는 것으로 보여진다.