• 한국항공우주학회지
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• 제31권10호
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• pp.40-50
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• 2003

저고도, 태양동기궤도인 아리랑 1호의 최초 임무운영 목표였던 3년 동안 관측된 궤도 변화를 분석하였다. 초기운영기간 동안 최적화된 궤도를 획득하기 위해 총 4회의 궤도조정이 있었으며, 총 8회의 안전모드가 발생하였다. 예상치 않은 안전모드 발생과 임무기간 동안 최고조에 달했던 태양활동이 궤도변화에 미치는 영향을 분석하였고, 초기 궤도조정 완료 직후 임무운영 기간에 대해 예측되었던 장기 궤도예측 결과와 궤도결정을 통해 실측된 궤도와의 차이를 분석하였다. 최적화된 궤도에서부터 운영된 3년의 임무기간 동안 고도를 제외한 나머지 궤도요소들은 설계된 임무궤도 범위 내에서 변화하였고, 태양동기궤도 특성을 유지하였음을 확인하였다.

• 생약학회지
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• 제28권1호
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• pp.26-34
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• 1997

The total MeOH extracts of 149 herbal medicines were screened far angiotensin ll receptor antagonistic activity using rat liver membrane fraction. Four medicinal plants- Atractylodes japonica, Evodia officinalis, Scutellaria baicalensis, Machilus thunbergii showed strong angiotensin ll antagonistic activity.

• 천문학회보
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• 제36권2호
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• pp.102.1-102.1
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• 2011

In this study we use three-dimensional magnetohydrodynamic simulations to investigate how the dynamic state of emerging magnetic field is related to the twist of field lines. Emerging magnetic field forms a magnetic structure on the Sun where various kinds of activity such as solar flares, jets, and coronal mass ejections are observed. To understand the physical mechanism for producing such activity, we have to know the dynamic nature of this structure. Since flares are the manifestation of rapidly dissipating electric current in the corona, we also investigate the distribution of current density inside the structure and examine how it depends on the field-line twist. To demonstrate the dynamic structure of emerging magnetic field, we focus on the factors characterizing the geometric property and stratification of emerging magnetic field, such as the curvature of field line and the scale height of field strength. These two factors show that emerging field forms a two-part structure in which the central part is close to a force-free state while the outer marginal part is in a fairly dynamic state where magnetic pressure force is dominant. We discuss how the field-line twist affects the two-part structure and also explain a possible relation between electric current structure and sigmoid observed in a preflare phase.

• 동의생리병리학회지
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• 제23권1호
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• pp.93-96
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• 2009

This study was attempted to investigate the anti-hypertensive activity of Solanum tuberosum, cv. Gui valley. Ethanol extract of Gui vally (EGV) increased free radical scarvenge activity up to 91.6% of control at $200{\mu}g/m{\ell}$. It's anti-oxidant activity is similar to 10 uM of ascorbic acid, well known as antioxidant. EGV inhibited Angiotensin-I-converting enzyme (ACE) activity in vitro. ACE plays a important role in regulation of blood pressure and ACE inhibitors are important for the treatment of hypertension. Anti-hypertensive activity of EGV in vivo was assessed in lead acetate (LAT)-induced hypertensive rats for 8 weeks. Elevated blood pressure in control group was significantly decreased by EGV at 200 mg/kg. Also, ACE activity in blood was also suppressed by EGV treatment. Taken together, these results suggest that EGV has an anti-hypersive activity via inhibition of ACE and can be used for the treatment or prevention of hypertension.

• 한국식품조리과학회지
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• 제27권6호
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• pp.763-772
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• 2011

This study evaluated the antioxidative activity and quality characteristics of Sulgidduk (traditional rice cakes) prepared with ramie leaf powder, in order to measure the antioxidative activity of ramie leaves, which are a potentially useful antioxidant food. Antioxidant activities were measured by total phenolic contents, the scavenging activities of DPPH radicals and ABTS+ radicals, and the reducing power. The total phenolic content of freeze dried ramie leaves was estimated at $58.70{\pm}11.42mg$ GAE/g. The $IC_{50}$ values for DPPH radicals and the ABTS+ radical scavenging activity of the ramie leaves were $23.76{\pm}1.41ug/mL$ and $174.82{\pm}6.4ug/mL$, respectively. The leaves also showed a high reducing power of $1.1057{\pm}0.03$ (O.D). To increase the utilizability of ramie leaf, we made Sulgidduk with added ramie leaf powder. Re-grading the quality characteristics of the altered Sulgidduk, the 3% and 5% addition levels most satisfied texture profile analysis and sensory evaluation. The antioxidative effect of the Sulgidduk significantly increased as the addition level increased, compared to the original Sulgidduk. In term of DPPH radical scavenging activity, the 5% or more addition level Sulgidduk showed an antioxdative effect increase of more than 50%. At the 3% or higher addition level, there was higher antioxidant activity than in the positive control group, which included vitamin C and BHT additions. We thus concluded that Sulgidduk with added ramie leaf power can be manufactured as a food that can satisfy sensory preferences as well as boosting antioxidant activity, at both the 3% and 5% addition level.

• 보건교육건강증진학회지
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• 제28권2호
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• pp.15-25
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• 2011

Objectives: This study aimed to assess the association between physical activity and health-related quality of life (HRQOL) in Koreans. Methods: A total of 9,689 adults(${\geq}19$ years, 4,036 men) from the Fourth National Health and Nutrition Examination Survey(2007-2008) were examined by the International Physical Activity Questionnaraire (IPAQ)-short form and Korean EuroQol-5 Dimension(KEQ-5D). Results: For the physical activity by IPAQ, 'Inactive group' was 75.3%, 'Minimally active group' was 23.5%, and 'Health-Enhancing Physical Activity(HEPA) group' was 1.2%. The mean HRQOL index was $0.89{\pm}0.13$. These relations of physical activity and HRQOL remained significant after adjustment for age, sex, smoking, subjective health status, stress, depression, and socioeconomic status variables (Adjusted $R^2$ = 0.334). Conclusions: Physical activity was associated with health-related quality of life. Physically active group had higher health-related quality of life than the inactive group.

• 한국유기농업학회지
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• 제26권3호
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• pp.477-488
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• 2018

본 연구에서는 국내 주요재배 매실 품종의 총 페놀, 플라보노이드 함량과 항산화 효과를 확인하고자 하였다. 총 페놀 함량은 $64.13-93.43mg{\cdot}100g^{-1}$으로 품종 간 함량에 차이가 있었다. 이 중 '앵숙'과 '단아'의 함량이 비교적 높게 나타났다. 또한 총 플라보노이드 함량을 측정한 결과 $6.16-18.57mg{\cdot}100g^{-1}$으로 총 페놀과 같이 품종 간에 유의적인 함량 차이를 보였다. 이 중 '고성'에서 가장 높은 함량을 보였다. DPPH 라디칼 소거활성을 측정한 결과 '남고', '회향실', '장속', '단아', '앵숙'에서 모두 50% 이상 비교적 강하게 나타났다. ABTS 라디칼 소거활성 측정 결과 모든 품종에서 80% 이상으로 전체적으로 높은 소거할성을 보였다. 이 중 '앵숙'이 가장 높은 소거활성을 보였다. 아질산염 소거 능력은 모든 품종에서 50% 이상의 높은 소거능력을 가지고 있는 것으로 확인 되었는데 이중 '남고'(76.03%), '고성'(70.56%), '양로'(70.32%)에서 70% 이상으로 비교적 높은 소거 활성을 보였다.

• 한국임상수의학회지
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• 제9권1호
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• pp.333-366
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• 1992

Safety of recombinant porcine somatotropin administration on pig was studied using 32 Landrace x Yorkshire crossbred pigs. The starting body weight ranged from 55.5kg to 65.3kg. Eight pigs were allotted to each low dose group of sustained releasing rPST(SL), high dose group of sustained releasing rPST(SH), daily injection group of rPST(DI), and control group(C). Pigs in SL group and SH group were injected subcutaneously twice in 3 week-interval with 1000$\mu\textrm{g}$ and 2000$\mu\textrm{g}$ of sustained releasing rPST per kg body weight, respectively. Pigs in DI group were injected intramuscularly with 100$\mu\textrm{g}$ of rPST everyday for 6 weeks. Blood was collected from anterior vena cava just before the first treatment, and at four weeks and six weeks of experiment. Hematological parameters and blood chemical parameters indicating liver function, kidney function, electrolyte metabolism, mineral metabolism and lipid metabolism were determined. Necropsy and urinalysis were performed after final blood collection. The results were summarized as follows, and it is concluded that rPST administration does not affect pig health negatively. 1. rPST administration did not affect kidney function as manisfested by BUN, creatinine and urinalysis. 2. rPST administration did not affect liver function as manisfested by total protein, albumin, serum AST activity serum ALT activity serum ALP activity, serum LDH activity, serum GGT activity and serum SDH activity. 3. rPST administration did not affect skeletal muscle, cardiac muscle and brain as manifasted by serum AST activity and serum LDH activity. 4. rPST administration increased blood glucose level within normal range. 5. rPST administration did not affect lipid metabolism as manisfested by triglyceride, cholesterol, and phospholipid concentrati on. 6. rPst administration dia not affect mineral metabolism as manisfested by calcium, phosphorus, magnesium and iron concentration. 7. rPST administration did not affect electrolyte metabolism as manisfested by Na, K, chloride concentration. 8. rPST administration did not affect erythrocyte count, leukocyte count, thrombocyte count, and plasma fibrinogen level.

• ALGAE
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• 제30권3호
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• pp.241-246
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• 2015

This research was conducted to develop effective and safe marine-derived antiviral compounds against norovirus. The ethyl acetate (EtOAc)-extract from Eisenia bicyclis exhibited strong antiviral activity against murine norovirus (MNV) as a norovirus surrogate. Among the phlorotannins from E. bicyclis, dieckol (DE) and phlorofucofuroeckol-A (PFF) were known to possess the strongest antibacterial activity. In this study, DE and PFF were evaluated for antiviral activity against MNV. DE and PFF exhibited strong anti-MNV activity with 50% effective concentration ($EC_{50}$) of $0.9{\mu}M$. However, PFF exhibited more effective antiviral activity against MNV with higher selective index (668.87) than that of DE (550.60), due to its lower cell toxicity against RAW 264.7. This is the first report on the anti-MNV activity of phlorotannins from seaweed. The results obtained in this study suggest that the phlorotannins could be used as a potential source of natural antiviral agents.

• 한국전문물리치료학회지
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• 제21권2호
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• pp.67-73
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• 2014

The aim of this study was to compare the activity of the upper trapezius (UT) and serratus anterior (SA) and ratio of UT to SA during shoulder elevations. Ten subjects with UT pain (UTP) and 13 subjects without UTP participated in this study. Subjects with a UTP of over five in a pain intensity visual analogue scale (0-10 ㎝) for more than 2 months and latent myofascial trigger points (MTrPs) in the UT muscle were included in the UTP group. Electromyography (EMG) data of UT and SA at 1st and 10th elevations were analyzed. Two-way repeated analyses of variance were used to compare the EMG activity of UT and SA and the ratio of UT to SA during shoulder elevations between groups with and without UTP. There was a significant increase in UT/SA ratio in the group with UTP compared to the group without UTP (p=.01). The activity of UT and SA measured at the 10th elevation was significantly greater than that in the first elevation (p<.05). The activity of SA was significantly greater in the group without UTP than the group with UTP (p=.03). However, there was no significant difference between groups with and without UTP in terms of UT activity (p=.28). These results indicate that UTP may have relevance to the increased muscle activity ratio of UT to SA during shoulder elevations.