• Asian-Australasian Journal of Animal Sciences
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• v.20 no.8
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• pp.1174-1181
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• 2007

To study the immunity of the buffalo mammary gland during involution and around parturition and compare it with the mastitic mammary gland, milk samples were collected from 9 Murrah buffaloes during the above critical periods. SCC of buffalo milk increased significantly (p<0.01) by day 21 of involution and one week prepartum. SCC was significantly higher around parturition but became normal at 14 days postpartum. Phagocytic activity (PA) and phagocytic index (PI) of the buffalo milk neutrophils decreased as the duration of the dry period increased. Elevated levels of immunoglobulins at calving improved the PA and PI, but the lowest PA of 18.8% and PI of 1.75 were recorded at 7 days postpartum. Buffaloes suffering from clinical mastitis had PA of 12.3% and PI of 1.46 that increased significantly (p<0.01) on the third day of treatment. Distance of teat from ground level was found to be minimum at one week before parturition. The investigation showed that in vitro phagocytic activity of buffalo neutrophils was weakest at one week postpartum.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.42 no.5
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• pp.481-486
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• 2009

In 2007, 43.5% mortality of the cultured oyster population occurred in Gamak Bay. Mortality rapidly increase in September and peak in October. To prevent future mass-mortality event, we investigated spawning and variation of oyster body composition. The main spawning period of culture oyster occurred from August to September. Condition index and body composition (protein and glycogen) appeared to be influenced by the spawning activity. Condition index and glycogen content in September were lowest (13.5% and 5.6 mg/g, respectively). However, protein, lipid and glycogen contents did not rapidly recover after the spawning activity. The data indicates that mass-mortality of cultured oysters in Gamak Bay may be due to deteriorated health, spawning activity, stress of the high water temperature and decreasing food resources.

• Journal of Nutrition and Health
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• v.36 no.3
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• pp.245-254
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• 2003

The aim of this study was to investigate the effects of P/S ratio of fatty acid and antioxidant (vitamin E, selenium) supplements on the serum lipid levels and hepatic antioxidant enzyme activity in rats. Female 16-week-old Sprague-Dawley rats were fed 6 different experimental diets for 4 weeks. While the peroxidizability index (PI) levels of fatty acids in the experimental diets were fixed at 81.22, the levels of P/S ratio of fatty acids were formulated at 0.38, 1.00, 4.81 (LP, MP, HP). These diets were supplemented with vitamin E (1,000 mg/kg diet) and selenium (2.5 mg/kg diet) (LP-S, MP-S, HP-S). This study showed that the serum concentrations of total-cholesterol and HDL-C increased with the increasing of the P/S ratio in the diet (p <0.05). Antioxidant supplementation significantly lowered the concentrations of triglyceride (TG) and VLDL-C of serum (p<0.05). Levels of thiobarbituric acid reactive substance (TBARS) in the liver tended to decrease with the increasing of the P/S ratio in the diet (p<0.001), but antioxidant enzyme activity in the liver was not significantly different. In addition, antioxidant supplementation significantly lowered TBARS level in the liver (p<0.05), but had no effect on antioxidant enzyme activity except for glutathione reductase (p<0.05). In conclusion, it is necessary to consider the properties of dietary fatty acids and antioxidants supplementation for the prevention of cardiovascular diseases.

• Nutrition Research and Practice
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• v.1 no.1
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• pp.14-18
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• 2007

This study investigated the effect of physical training and oxidative stress on the anti oxidative activity and on plasma lipid profile. Forty eight rats were given either a physical training or no training for 4 weeks and were then subdivided into 3 groups: before-exercise (BE); during-exercise (DE); after-exercise (AE). The antioxidative activity was evaluated with the activities of catalase in plasma and superoxide dismutase (SOD), the ratio of reduced glutathione/ oxidized glutathione (GSH/GSSG) and the level of malondialdehyde (MDA) in liver. The plasma concentrations of triglyceride (TG), total cholesterol (TC), high-density lipoprotein-cholesterol (HDL-C)) were also compared. Compared to those of non-training group. catalase activities of training group were lower before exercise but higher during and after exercise. SOD activities were higher regardless of exercise. GSH/GSSG ratio was higher before exercise but was not significantly different during exercise and even lower after exercise. There were no differences between non-training group and training group in MDA levels regardless of exercise. Compared to those of non-training group, atherosclerotic index of training group was lower after exercise and there were no significant differences before and during exercise. There were no differences between non-training group and training group in HDL-C regardless of exercise. These results suggest that moderate physical training can activate antioxidant defenses and decrease the atherosclerotic index and this beneficial effect is evident under exercise-induced oxidative stress.

• Journal of Nutrition and Health
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• v.43 no.3
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• pp.215-223
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• 2010

Sasa borealis leaf has been known to have anti-diabetic properties. In this study, we tried to evaluate the effects of Sasa borealis leaf extract (SBE) on the inhibition of $\alpha$-glucosidase activity and postprandial glycemic response following ingestion of four carbohydrate-rich foods; cooked rice, ramen (instant noodle), noodle, and bread. Fourteen healthy female adults consumed 50 g of glucose (control) or one of the four foods containing 50 g of available carbohydrate with or without 2,000 mg of SBE. The activity of $\alpha$-glucosidase was inhibited dose-dependently by SBE. With SBE, blood glucose concentration at 15 min and the positive area under the curve (AUC) of postprandial glycemic response at 15 min and 30 min after consuming each of the four foods were reduced significantly. As the result, total positive AUC during 120 min was decreased in case of taking cooked rice or bread. Glycemic index and glycemic load of the four foods were declined from 13% to 23% with SBE. The results of this study suggest that SBE may be effective for postprandial glucose control by inhibiting $\alpha$-glucosidase activity.

• Journal of Biosystems Engineering
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• v.38 no.2
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• pp.163-170
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• 2013

Purpose: The purpose of this study is to provide analysis of physiological, biomechanical responses occurring from the operation to lifting or twist lifting task appears frequently in agricultural work. Methods: This study investigated the changes of physiological factors such as heart rate, heart rate variability (HRV) and biomechanical factors such as physical activity and kinetic analysis in the task of twisting at the waist while lifting. Results: Heart rates changed significantly with the workload. The result indicated that the workload of 2 kg was light intensity work, and the workload of 12 kg was hard intensity work. Physical activity increased as the workload increased both on wrist and waist. Besides, stress index of the worker increased with the workload. Dynamic load to herniated discs was analyzed using inertial sensor, and the angular acceleration and torque increased with the workload. The proposed measurement system can measure the recipient's physiological and physical signals in real-time and analyzed 3-dimensionally according to the variety of work load. Conclusions: The system we propose will be a new method to measure agricultural workers' multi-dimensional signals and analyze various farming tasks.

• Journal of the Korean Dietetic Association
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• v.12 no.2
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• pp.146-156
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• 2006

The purpose of this study was to analyze characteristics of the obese children in depth and provide basic information for a comprehensive educational program for the obese children. Physical and biochemical characteristics, nutrient intake, and self-esteem, etc. of 16 obese elementary school children (OC) and 14 normal weight elementary school children (NWC) were examined. Self-esteem was measured using Likert-type scales with description. Plasma levels of total cholesterol, LDL-cholesterol, and glucose of OC were higher than those of NWC. Dietary intake with a lunch provided more energy and vitamin B1 in OC than in NWC. Physical appearance and athletic competence among self-esteem in OC were lower than in NWC. However, there was no significant difference in physical activity between OC and NWC. In OC, atherogenic index was positively related with waist circumference, obesity index and BMI while athletic competence self-esteem was negatively related with them. It is recommended that the children should receive the comprehensive educational program for improving children' dietary behavior and their self-esteem.

• The Journal of Asian Finance, Economics and Business
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• v.7 no.10
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• pp.95-107
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• 2020

This study analyzes the effect of corporate social responsibility (CSR) activity on investors' heterogeneous beliefs. The hypothesis of this study is based on the conflicting effects of CSR activities on firm value and earning's quality. Investors' heterogeneous beliefs used in the empirical analysis of this study are trading volume, and CSR activity is measured by the KEJI Index (Korea Economic Justice Institute Index). This study performs an empirical analysis using regression analysis including control variables. CSR activities are found to have a positive relationship with trading volume. This is consistent regardless of the low and high accounting information (earning's quality). It can be interpreted that Korea's CSR activity acts as an incentive to increase investors' heterogeneous beliefs about target companies. In other words, it implies that the investor judges CSR activities negatively when evaluating firm value. This study could have a policy implication in that it analyzes how CSR activities affect investors' decision-making. In other words, this study analyzed CSR activities from the perspective of shareholders. Therefore, this study is expected to provide useful information for policymaking by regulatory agencies. In particular, its contribution is to presents data that CSR activities can be a negative factor in evaluating firm values.

• Preventive Nutrition and Food Science
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• v.11 no.3
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• pp.218-225
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• 2006

Freeze-dried kimchi fractions, water-soluble (WSK) versus water-insoluble (WISK), on their effects on plasma lipids and for their fibrinolytic activities were studied. Nineteen middle-aged healthy subjects were assigned to WSK, WISK, or placebo during 6 weeks of kimchi supplementation. Subjects in the WSK and WISK groups were supplemented with 3 grams of kimchi pills (equivalent to 60 grams of fresh kimchi), while the placebo group was on their normal diets. LDL/HDL and atherogenic index decreased in the subjects who received kimchi pills, but not in those in the placebo group. The levels of plasma triglyceride were significantly decreased in the WSK group compared with those in the WISK group (p<0.05). However, there was no difference in the levels of total cholesterol and HDL between the two groups. Fibrinolytic activity of WISK was significantly higher than that of WSK.

• Journal of the Korean Society of Food Science and Nutrition
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• v.21 no.4
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• pp.381-385
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• 1992

The effect of antioxidant activity of soyasaponin on the liposomal phospholipid membrane were investigated by spectrophotometry. The oxidation index and oxidation rate of ${\alpha}-tocopherol$ containing egg phosphatidylcholine (EPC) liposomes were markedly decreased in the presence of soyasaponin relative to those of purephospholipid liposmes. ${\alpha}-tocopherol$ containing liposomes delayed the oxidation of liposomes. Especially soyasaponin stimulated the antioxidant activity of ${\alpha}-tocopheroal$ in liposomes. These results indicates that soyasaponin in liposomes had some additive effect on antioxidant of ${\alpha}-tocopherol$ toward liposomes.