• Journal of Preventive Medicine and Public Health
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• 제47권2호
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• pp.74-83
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• 2014

Mercury exists naturally and as a man-made contaminant. The release of processed mercury can lead to a progressive increase in the amount of atmospheric mercury, which enters the atmospheric-soil-water distribution cycles where it can remain in circulation for years. Mercury poisoning is the result of exposure to mercury or mercury compounds resulting in various toxic effects depend on its chemical form and route of exposure. The major route of human exposure to methylmercury (MeHg) is largely through eating contaminated fish, seafood, and wildlife which have been exposed to mercury through ingestion of contaminated lower organisms. MeHg toxicity is associated with nervous system damage in adults and impaired neurological development in infants and children. Ingested mercury may undergo bioaccumulation leading to progressive increases in body burdens. This review addresses the systemic pathophysiology of individual organ systems associated with mercury poisoning. Mercury has profound cellular, cardiovascular, hematological, pulmonary, renal, immunological, neurological, endocrine, reproductive, and embryonic toxicological effects.

• 산업경영시스템학회지
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• 제10권16호
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• pp.7-18
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• 1987

인간은 누구나 출생에서부터 사망에 이르기까지 신체내부에서 시작되는 신체리듬(physical rhythm), 감성리듬 (emotional rhythm), 지성리듬(intellectual rhythm)이라고 불리는 세가지 리듬 곡선의 지배를 받는다. 이러한 바이오리듬은 신체적 내구성이라든가 창조성, 학교에서의 시험성적 같은 인간행동 내용에 서로 다른 리듬이 영향을 미치게 된다. 본 연구에서 조사해 본 결과 학생의 저조기(low, weak)에 나타난 성적은 고조기(high, strong)에 나타난 성적보다 더 낮음을 볼 수 있었다. 따라서 과연 저조기가 인간능력에 영향을 끼쳐 성적이 고초기에 비하여 더 낮은 것인지 아니면 우연히 일어난 것인지의 여부를 통계적 방법으로 검증하였다. 또한 본 연구에서는 한 군을 대표할 수 있는 평균 혼합바이오리듬 개념을 총빈 혼합바이오리듬을 이용하여 산출하였다.

• 한국가구학회지
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• 제16권2호
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• pp.59-65
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• 2005

As physical condition of students improves, there is a need to develop human body-friendly desk and chair for students. In this study, desks and chairs were manufactured with curved veneer lamination under high frequency heating and pressing, using ten wood species such as Japanese red pine, Korean pine, pitch pine, Japanese larch, yellow poplar, black locust, oak, radiata pine, beech, and birch. The performance of these products were evaluated. The results obtained were summarized as follows; With high frequency heating, the turned lamination of veneers with full size sheet ($3{\times}6\;feet$) prepared by rotary lathe peeling was successfully applied for making the members of desk top, leg frames of desk and chair. Bending strengths of desk tops were relatively greater for yellow poplar, black locust and red pine, which were similar to those of beech and birch. Bending strengths of desk legs were classified into greater species group (red pine, yellow poplar, larch) and lower species group (radiata pine, Korean pine, pitch pine). Compressive strengths of chair legs in parallel direction to the lamination were greater in black locust and larch. On the other hand, differences between outer and inner gap at the top and drawer bottom of desk top were rather larger for the laminations of birch and beech, and less for those of yellow poplar and pitch pine, showing greater stability of open drawer space. In results, yellow poplar, larch, pitch pine and red pine showed good appearance and strength properties at the curved veneer lamination. Accordingly, it was believed that these domestic woods were able to substitute for birch which was being imported for the use of veneer-laminates type furniture.

• 한국약용작물학회지
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• 제25권6호
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• pp.367-374
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• 2017

Background: An imbalance in energy intake and expenditure can cause obesity, which is a major risk factor for chronic diseases such as heart disease, type 2 diabetes, insulin resistance, cancers and hyperlipidemia. Methods and Results: In this study, we evaluated the anti-obesity effects of a water extract from the young leaves of barley sprout (BS) in 3T3-L1 cells and in high-fat diet (HFD)-induced obese mice (HF). Lipid accumulation measurement indicates that BS markedly inhibited adipogenesis by reducing lipid droplet production in a dose-dependent manner. Furthermore, the mRNA expression of adipogenic transcription factors peroxisome proliferator-activated receptor-${\gamma}$ and fatty acid synthetase, CCAAT/enhancer binding protein-${\alpha}$ and fatty acid binding protein 4 in 3T3-L1 cells was significantly inhibited by BS treatment. In an in vivo test, the BS-administered group of HFD-induced mice showed less body weight gain, and lower liver and epididymal white adipose tissue weights. The BS-treated mice showed decreased serum levels of leptin and lipids compared to untreated HFD mice and the levels of adiponectin and the HDL-cholesterol/total cholesterol ratio increased. These results indicate that BS inhibits body fat accumulation by reducing the mRNA expression of lipogenesis transcription factors and increasing serum adipokine concentration in in vitro and in vivo tests. Conclusions: BS reduced high fat diet-induced weight gain and had a positive effect on dyslipidemia.

• 한국항해항만학회지
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• 제35권10호
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• pp.811-816
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• 2011

이 논문에서는 저전력 통신 기법 가운데 하나인 PSPM(Phase Shift Pulse position Modulation) 전송 기법이 근거리 수중음향 채널에서 어떠한 성능을 나타낼지 고찰하기 위해 해상실험을 통해 분석하였다. PSPM은 QPSK(Quadrature Phase Shift Keying)와 PPM(Pulse Position Modulation) 기법을 서로 혼합한 형태로 WBAN(Wireless Body Area Network) 시스템에서 저전력 통신을 위해 제안된 기법이다. 이는 기존의 일반적인 전송 방식에 비해 대역효율은 떨어지지만 전력효율은 증가하는 것으로 알려져 있다. 이 논문에서는 실해역에서 취득한 PSPM 데이터를 통해 BER 성능을 분석한다. 실험 결과 QPSK의 경우 총 56,000개의 전송 데이터 비트 중 오차 비트 수가 3,384개로 BER이 약 $6.04{\times}10^{-2}$이고, PSPM의 경우는 19,652개로 BER이 약 $3.5{\times}10^{-1}$를 얻었다. 또한 영상 데이터 전송에 따른 PSNR(Peak signal-to-noise ratio)을 비교한 결과 QPSK의 경우 9.37 dB 였으며, PSPM의 경우 9.11 dB 였다.

• 대한한방내과학회지
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• 제30권3호
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• pp.632-638
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• 2009

The patient was hospitalized for treatment of cerebral infarction (Lt. BG). He was a 61-year-old man who was diagnosed with membranous nephropathy (MN) in 2000. Before admission, he was admitted for treatment for cerebral infarction at another hospital. During that admission, his MN symptoms went from bad to worse, and medication for MN was started (steroid and cyclophosphamide therapy). In our hospital, we started herbal medicine and western medicine combination therapy as well as oriental rehabilitation therapy. Our main herbal medicine was Magsungsinyeom-bang(Moxingshenyanfang). After 5 months, levels of 24 hrs proteinuria, total cholesterol, LDL-cholesterol and triglyceride decreased, levels of serum albumin, total protein increased, and clinical symptoms (lower limb edema, general body weakness) improved.

• 한국산업보건학회지
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• 제21권1호
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• pp.25-32
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• 2011

Objectives: This study aims to evaluate the dietary intake and blood concentrations for examination of exposure levels and exposure characteristics of Cd and Pb via food among college students aged 20 years living in Busan area. Methods: Food duplicate per a day and venous blood samples were accepted from healthy man and women college students. The samples were analyzed with graphite furnace atomic absorption spectrophotometer. Results: Dietary intake of Cd and Pb in the participants were $17.5{\mu}g\;Cd/day$, $21.7{\mu}g\;Pb/day$. Blood concentrations were $2.01{\mu}g\;Cd/L$, $4.32{\mu}g\;Pb/dL$, respectively. Conclusions: Smoking and drinking habits might be high influential factors in 20 years college students. Dietary intake of Cd and Pb, however, from food group of seaweed, or fish and shellfish in 20 years college students were lower than that in any other age group.

• Journal of Nutrition and Health
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• 제26권1호
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• pp.21-33
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• 1993

This balance study was performed to investigate nutritional effects of guar gum and calcium supplement for 8 weeks. 36 male rate of Sprague-Dawley strain weighing 50g were blocked into six groups : 5CN, 5GN, 5CS, 5GS, FFN, 10GN. Food intake, body weight gains, FER, PER, bioavailabity of energy, protein, fat, Ca and P, and Ca & P content of femur and kidney was measured. The results obtained in this study were summarized as follows: (1) Feed intake, weight gains, FER, PER and bioavailabilities of protein and P and the contents of Ca & P in femur of 5GB were significantly higher than 5CN and 5CS (p<0.05) but was not significant different with those 5GN. Fat bioavailabilities of 5GS was significantly lower than 5CN and 5GN (p<0.05) but was not significant different with those of 5CS. Ca contents of kidney of 5GS was significantly higher than 5CN and 5GN(p<0.05) but was not significant different with those of 5SC. (2) According to guar gum levels feed intake. FER and PER were not sifgnificantly different among groups but body weight gains, bioavailabilities of energy, protein, fat and Ca, Ca & P content of femur was significantly decreased (p<0.05). Bioavailabilities of P was significantly increased according to the guar gum levels (p<0.05). Ca contents in Kidney of 10GN was significantly higher those of 5GN(p<0.05) but P contents in kidney was not significant difference by guar gum levels. Therefore 5% supplemental guar gum in diet of obese man and diebetics could be recommended. But it should be careful in using 10% guar gum in diet.

• 한방재활의학과학회지
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• 제28권2호
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• pp.1-20
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• 2018

Objectives This study was conducted to experimentally evaluate the effects of Younggyechulgam-tang-ga Hwanggi(YGT) on obesity in mice induced by high fat diet. Methods The experiment was conducted with 4-week-old male mice divided into 5 groups. They were a normal diet group(Nor), a high fat diet group(Veh), a positive drug control group-orlistat 40 mg/kg(Oris), a 1.08 g/kg group(YGTL), and a 2.16 g/kg group(YGTH), and were tested for five weeks. Changes in antioxidant activity, body weight, organ weight, ROS, AST, ALT, TC, TG, HDL-C, LDL-C and lipid metabolism protein were checked. Results YGTL and YGTH group significantly reduced body weight compared to Veh group. YGTH group significantly reduced visceral fat weights compared to Veh group. In blood biochemistry analysis, ROS, AST, ALT, TC, TG and LDL-C in YGTL and YGTH group were significantly lower than Veh group. HDL-C increased significance in YGTL and YGTH group. In antioxidation protein analysis, Catalase, GPx and HO-1 have increased significantly in YGTL and YGTH group. YGTH group have increased $PPAR-{\alpha}$, p-AMPK compared to Veh group. but decreased FAS. SREBP-1, p-ACC levels in YGTL and YGTH group were decreased compared to Veh group, however CPT-1, UCP-2 levels in YGTL and YGTH group were increased compared to Veh group. Conclusions YGT has anti-obesity effects by regulating lipolysis and antioxidation in a diet-induced obesity model. Additional clinical studies are needed.

• Nutrition Research and Practice
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• 제18권4호
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• pp.534-543
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• 2024

BACKGROUND/OBJECTIVES: Studies on the impact of dietary fiber intake on kidney stones are few, and their results were controversial. This study aimed to explore the association between dietary fiber intake and kidney stones in the nationally representative population of the USA. SUBJECTS/METHODS: This cross-sectional research included 8,588 participants from the National Health and Nutrition Examination Survey, 2011 to 2018. Information regarding dietary fiber intake was obtained from a 24-h recall survey. Participants were categorized into different dietary fiber intake tertiles according to the average of 2 days of dietary recall data. The outcome was self-reported kidney stones. After adjusting for the traditional risk factors, a multivariate logistic regression model was used to examine the association between dietary fiber intake and kidney stones. RESULTS: Eight hundred seventy-two participants had kidney stones. The weighted prevalence (SE) of kidney stones in the lowest tertile, medium tertile, and highest tertile of dietary fiber intake was 11.8% (0.8%), 10.3% (0.8%), and 9.1% (0.8%), respectively. After adjusting for age, sex, race and ethnicity, education level, smoking status, alcohol consumption, physical activity, body mass index, hypertension, diabetes, dyslipidemia, daily water intake, chronic kidney disease stage 3-5, and total energy intake, participants with the highest tertile of fiber intake had a significantly lower risk of kidney stones (odds ratio [OR], 0.68; 95% confidence interval [CI], 0.48-0.95) compared to those in the lowest tertile. Every 5 g/day increment in dietary fiber intake was associated with a significant decrease in risk of kidney stones (OR, 0.90; 95% CI, 0.83-0.98). CONCLUSION: An increase in dietary fiber intake was associated with a lower risk of kidney stones, suggesting adults should be encouraged to maintain an adequate dietary fiber intake to prevent the development of kidney stones. Our results provide evidence to formulate nutrition management strategies for the prevention of kidney stones.