• 한국대기환경학회지
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• 제21권1호
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• pp.119-129
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• 2005

The ambient TSP data measured at Seoul, Incheon. Taean, Daegu, Busan in Korea were used to explain the chemical composition and general features of Asian Dust (AD) observed in Korea. 9 episodes out of 19 were sampled from 2000 through May 2002, and measurements were conducted covering ionic and metal components with mass concentration. The results showed that daily averaged mass concentration (TSP) during the AD episodes was 458 $\mu\textrm{g}$/㎥, and ionic and metal concentrations were 27.93 $\mu\textrm{g}$/㎥ and 71.7 $\mu\textrm{g}$/㎥, respectively, accounting for 6.1 % and 15.5% of the total aerosol mass. TSP concentrations during episodes were varied from 120 to 1742 $\mu\textrm{g}$/㎥ according to the impact of Asian Dusts and had a tendency of showing higher values at sites in the west side of Korea, which can be explained by the effect of diffusion and deposition. In this study, ionic components like Ca (NO$_3$)$_2$, CaSO$_4$, NaNO$_3$, Na$_2$SO$_4$ were prominent types in secondary aerosol during AD periods and also indicated that V, Co as well as soil elements such as Ca, Fe, Mg, Mn, K correlated well with Al, while Cu, Cd, Pb, Zn didn't agree well with it. In addition, enrichment factors (EFs) for each metal component were obtained to provide simple information about source contribution of Asian Dust, and the results were compared with those from other AD studies. In this study, the results showed that aerosol properties in Korea during the Asian Dust were considerably different from those of general atmospheric condition and specially varied from case to case rather than site to site, which implies that there are certain variations in the soil of source region, pathways of air mass, and meteorological condition. For the enhanced study, those factors should be combined with the features of Asian Dust resolved from this study.

• 한국환경과학회지
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• 제27권4호
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• pp.241-250
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• 2018

The objective of this study was to estimate air quality trends in the study area by surveying monthly and seasonal concentration trends. To do this, the mass concentration of $PM_{10}$ samples and the metals, ions, and total carbon in the $PM_{10}$ were analyzed. The mean concentration of $PM_{10}$ was $33.9{\mu}g/m^3$. The composition of $PM_{10}$ was 39.2% ionic species, 5.1% metallic species, and 26.6% carbonic species (EC and OC). Ionic species, especially sulfate, ammonium, and nitrate, were the most abundant in the $PM_{10}$ and had a high correlation coefficient with $PM_{10}$. Seasonal variation of $PM_{10}$ showed a similar pattern to those of ionic and metallic species. with high concentration during the winter and spring seasons. $PM_{10}$ showed high correlation with the ionic species $NO_3{^-}$ and $NH_4{^+}$. In addition, $NH_4{^+}$ was highly correlated with $SO{_4}^{2-}$ and $NO_3{^-}$. We obtained four factors through factor analysis and determined the pollution sources using the United States Environmental Protection Agency(U.S. EPA) pollution profile. The first factor accounted for 51.1% of $PM_{10}$ from complex sources, that is, soil, motor vehicles, and secondary particles: the second factor indicated marine sources; the third factor, industry-related sources; and the last factor, heating-related sources. However, the pollution profile used in this study may be somewhat different from the actual situation in Korea because it was from US EPA. Therefore, to more accurately estimate the pollutants present, it is necessary to create a pollution profile for Korea.

• Clinical and Experimental Pediatrics
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• 제45권10호
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• pp.1219-1226
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• 2002

목 적 : 국내에서는 1960년대 중반 이후 꾸준히 홍역 예방 접종을 시행해 옴에도 불구하고 2000-2001년에 전국적인 홍역의 대유행이 발생하였다. 저자들은 수도권 지역내 홍역 환아 중 입원 치료를 받은 환아를 대상으로 임상 양상의 특징을 조사하고 예방 접종의 효과에 대하여 알아보았다. 방 법: 2000년 6월부터 2001년 2월까지 고려대학교 안산병원, 관동대학교 일산 명지병원 및 서울 동부시립병원 소아과에서 임상적으로 진단된 홍역 환자 305명을 대상으로 연령과 성, 홍역 예방 접종력, 증상이 나타난 후 입원까지의 기간, 입원 기간, 합병증의 유무 및 그 유형 그리고 혈청 홍역 특이 IgM/IgG 항체를 검사하여 백신 실패율을 구하였다. 결 과 : 대상 환아 305명 중 12개월 미만은 118명(38.7%), 12-47개월은 84명(27.5%), 48개월 이상은 103명(33.8%)이었고 남녀비는 1.2 : 1로 남아가 많았다. 발병 연령은 $50.0{\pm}56.4$개월, 발진이 나타난 후 입원할 때까지의 기간은 $2.5{\pm}1.6$일, 재원 기간은 $6.4{\pm}3.4$일이었으며, 발진 발생 후 입원까지의 기간과 재원기간은 연령군 별로 유의한 차이를 보이지 않았다. 홍역 입원 환아는 2000년 6월부터 발생하기 시작하여 10월부터 현저히 증가되었으며 12월에 최고조에 달하였고 2001년 2월 이후로는 거의 발생하지 않았다. 유행은 연장아부터 시작되어 점차 어린 연령군으로 전파되는 양상을 보였다. 홍역 환아 중 1회 이상 홍역 예방 접종을 시행한 경우는 65.2%(199명)였고, 48개월 이상의 환아 중 현재의 예방 접종 권장안대로 2회 접종을 받은 경우는 13.6%였다. 1회의 홍역 예방 접종력이 있는 환아 180명 중 일차 백신 실패율은 59.4%(107/180명), 이차 백신 실패율은 3.9%(7/180명)였다. 61.6%의 환아가 합병증을 나타냈으며, 38.4%는 합병증이 나타나지 않았다. 합병증은 폐렴이 31.8%로 가장 많았고, 기관지염 11.5%, 중이염 4.6%의 순이었으며 백신 접종력 및 접종 횟수는 합병증의 발생과 유의한 상관성이 없었다. 결 론 : 2000년-2001년에 유행한 홍역의 임상 양상은 이전의 유행과 비교하여 볼 때 특이한 변화를 보이지는 않았으나 나이가 많은 연령층에서 시작하여 어린 연령층으로 확산되는 특징이 있었다. 홍역 환아들 중에서는 특히 일차 백신 실패율이 매우 높으므로 홍역 예방을 위해서는 이차 접종을 철저히 시행하는 것이 매우 중요하다.

• 원예과학기술지
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• 제33권2호
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• pp.251-258
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• 2015

Eurycoma longifolia is an important rare medicinal plant that contains valuable bioactive compounds. In the present study, cell suspension culture of E. longifolia was established for the production of biomass and phenolic compounds. Various medium parameters, such as concentration of auxin, salt strength of the medium, and sucrose and nitrogen concentrations, were optimized for the production of biomass at the flask-scale level. Full strength Murashige and Skoog (MS) medium supplemented with $3.0mg{\cdot}L^{-1}$ naphthaleneacetic acid (NAA), 3% (w/v) sucrose, 0:60 $NH{_4}^+:NO{_3}^-$ was found suitable for biomass accumulation. Based on the optimized flask-scale parameters, cell suspension cultures were established in balloon-type bubble bioreactors, and bioprocess parameters such as inoculum density and aeration rate were optimized. Inoculum density of $50g{\cdot}L^{-1}$ and increasing aeration rate from 0.05 to 0.3 vvm, with increases every 7 days, were suitable for the accumulation of both biomass and phenolic compounds. With the optimized conditions, $14.70g{\cdot}L^{-1}$ dry biomass, $10.33mg{\cdot}g^{-1}$ DW of phenolics and $3.89mg{\cdot}g^{-1}$ DW of flavonoids could be achieved. Phenolics isolated from the cell biomass showed optimal free radical scavenging activity.

• 대한한의학회지
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• 제44권4호
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• pp.26-40
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• 2023

Objectives: This study was to evaluate the effectiveness and safety of Bojungikgi-tang for lung cancer patients with anorexia. Methods: This was a single-arm, open-label, and single-center trial, and suitable participants took Bojungikgi-tang (Buzhongyiqi-tang in Chinese, Hochuekki-to in Japanese) three times a day before or between meals for six weeks (42 days). After registration of clinical trials (visit 2), they visited the hospital every three weeks (visits 3 and 4) and measured or tested the effectiveness or safety evaluation variables to analyze the results. The primary outcome was the anorexia/cachexia subscale (A/CS) of functional assessment of anorexia/cachexia therapy (FAACT) score. Results: Seventeen lung cancer patients were included in the intention-to-treat (ITT) analysis. Lung cancer patients had higher A/CS of FAACT scores after six weeks of Bojungikgi-tang administration compared to that at the baseline. This was not significant four lung cancer (p=0.1668). In the secondary outcomes, the visual analog scale (VAS) score of anorexia decreased significantly (p=0.0009), and the CD4/CD8 ratio (p=0.0396) and CD4 levels (p=0.0345) significantly increased after six weeks of treatment. No serious adverse events were reported with Bojungikgi-tang in lung cancer patients. Conclusions: Bojungikgi-tang can be an effective and safe treatment for anorexia in lung cancer patients undergoing chemotherapy.

• 한국대기환경학회지
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• 제30권5호
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• pp.434-448
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• 2014

The aerosol characteristics between haze episode and Asian dust event were identified in January and March, 2013 in Gwang-ju of Korea to investigate the metal elements, ionic concentrations and carbonaceous particles of $PM_{2.5}$ and $PM_{10}$. In the haze episode, the concentrations were increased 1~3.2 times of ionic species and 1.6~2.7 of metal elements. Especially, the concentration of $NO{_3}{^-}$, $SO{_4}{^2-}$ and $NH{_4}{^+}$ consists of 50 percent in ionic species during haze episode that was higher than Asian dust event. This suggests that secondary aerosols from anthropogenic air pollution were mainly contributed by haze episode. During the Asian dust event, increase of metal concentrations was higher than haze episode because of remarkable increase of Ti, K and Fe originated from soil. The concentrations of carbonaceous particles were increased 2.5 times during haze episode, and 2.4 times of OC and 2.1 times of EC during Asian dust event in $PM_{2.5}$. However, these aerosol mass concentration does not affect the OC/EC ratio. The average equivalence ratios of cations/anions in $PM_{2.5}$ were 0.99 in haze episodes and 0.94 during non-event day. The neutralization factor of $NH_3$ was higher than that of $CaCO_3$. Futhermore, $NH{_4}{^+}$ aerosol was aged due to atmospheric stagnation that might be affected by the haze episode.

• 한방안이비인후피부과학회지
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• 제23권3호
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• pp.138-153
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• 2010

Purposes : The object of present study is to detect the Effects of Snail Secretion Filtrate and Hyaluronic acid on the skin barrier's recovery of the Atopic dermatitis. Methods : A total of 20 patients who visited Semyung Hanny Oriental Medical Center from september 1st, 2009 to August 31th, 2010 were included in this study. In this study, they were treated with Snail Secretion Filtrate(experimental group) and Hyaluronic acid(control group). For 4 weeks gross examination, hematological examination and instrumentation through skin-ANBT equipment were made before and after the experiments to see how well the products for experimental group act against those for control group in recovering the damaged skin barriers by Atopic dermatitis. Results : 1. In the primary endpoint, SCORAD Index showed a statistically significant decline in both the control group and the experimental group. However, the experimental group showed greater statistical significance than the control group. 2. In the secondary endpoint index of skin hydration, both the control group and the experimental group did not show a statistically significant increase. However, the degree of skin hydration in the experimental group is greater than in the control group. 3. In global assessment of efficacy, it was higher in the experimental group than in the control group for both the subjects and the researchers. 4. To evaluate the safety of the products for the human body, hematological examination and hematological biochemical examination were conducted; both the control group and the experimental group showed no abnormal level. Therefore, the safety of the products, if used for so long a time, proved to be safe for the human body. 5. Product satisfaction was higher in the experimental group than in the control group. Conclusions : According to above experiments, Snail Secretion Filtrate was effective on the Atopic dermatitis.

• 한국환경보건학회지
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• 제35권1호
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• pp.21-35
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• 2009

The Asian dust storms which originated in the deserts of Mongolia and China transported particles to Korea and led to a high concentration of atmospheric particulate matters (PM) of more than $1000{\mu}g/m^3$ throughout the country in the spring, of 2007. Public concern, in Korea, about the possible adverse effects of these dust events has increased, as these dust storms can contain various air pollutants emitted from heavily industrialized eastern China. The objectives of this study were to understand the concentration characteristics of PM as a function of particle size between the Asian dust storm episodes and non-Asian dust period and to consider the mass size distribution of PM in the Asian dust storms and their water soluble ion species on the potential, possible effects on deposition levels in the three regions (nasopharyngeal, tracheobronchial, and alveolar) of the human respiratory system. The size distribution of PM mass concentration during the Asian dust storms showed a peak in the coarse particle region due to the long-range transport of soil particles from the deserts of Mongolia and China, which was identified by HYSPLIT-4 model for backward trajectory analysis of air arriving in the sampling site of Iksan. During the non-Asian dust period, there were two different types in PM size distribution: bimodal distribution when low concentrations of $PM_{2.5}$ were observed, while unimodal distribution having a peak in fine particle region when high concentrations of $PM_{2.5}$ were showed. This unimodal distribution with high concentrations of fine particulate and secondary air pollutants such as ${SO_4}^{2-}$, ${NO_3}^-$, ${NH_4}^+$ was found to be due to the long-range transport of air pollutants from industrialized eastern China. During the Asian dust storms, the mean concentrations of PM that can be deposited in the nasopharyngeal, tracheobronchial, and alveolar region were $128.8{\mu}g/m^3$, $216.5{\mu}g/m^3$, and $89.6{\mu}g/m^3$, respectively. During the non-Asian dust period, the mean concentrations of PM that can be deposited in the nasopharyngeal, tracheobronchial, and alveolar region were $8.4{\mu}g/m^3$, $9.5{\mu}g/m^3$ and $38.5{\mu}g/m^3$, respectively.

• Journal of Ginseng Research
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• 제45권1호
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• pp.191-198
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• 2021

Background: Most clinical studies of immune responses activated by Korean Red Ginseng (KRG) have been conducted exclusively in patients. However, there is still a lack of clinical research on immune-boosting benefits of KRG for healthy persons. This study aims to confirm how KRG boosts the immune system of healthy subjects. Methods: A total of 100 healthy adult subjects were randomly divided into two groups that took either a 2 g KRG tablet or a placebo per day for 8 weeks. The primary efficacy evaluation variables included changes in T cells, B cells, and white blood cells (WBCs) before and after eight weeks of KRG ingestion. Cytokines (TNF-α, INF-γ, IL-2 and IL-4), WBC differential count, and incidence of colds were measured in the secondary efficacy evaluation variables. Safety evaluation variables were used to identify changes in laboratory test results that incorporated adverse reactions, vital signs, hematological tests, blood chemistry tests, and urinalysis. Results: Compared to the placebo group, the KRG intake group showed a significant increase in the number of T cells (CD3) and its subtypes (CD4 and CD8), B cells, and the WBC count before and after eight weeks of the intake. There were no clinically significant adverse reactions or other notable results in the safety evaluation factors observed. Conclusion: This study has proven through its eight-week intake test and subsequent analysis that KRG boosts the immune system through an increase in T cells, B cells, and WBCs, and that it is safe according to the study's safety evaluation.

• 한국환경과학회지
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• 제29권2호
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• pp.177-189
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• 2020

We analyzed the recent characteristics of Particulate Matter (PM) including PM₁₀ (PM with diameter of less than 10 ㎛) and PM_2.5 (PM with diameter of less than 2.5 ㎛) observed in Busan metropolitan area, and compared them with those measured in Seoul metropolitan area. This analysis includes the monthly, seasonal, and annual variations and differences, in emissions and chemical compositions observed in both Busan and Seoul areas. Synoptic meteorological conditions were investigated at the time when high PM concentrations occurred in each of the two areas. The results showed clearly decreasing trends of annual mean concentrations with strong seasonal variations: lower in summer and higher in winter in both areas. In comparison with Seoul, the seasonal variation in Busan demonstrated relatively lower, but showed greater summer fluctuations than in Seoul metropolitan area. This is implying the importance of secondary generation of PM in summer via active photochemical reaction in Busan area. In high concentration days, Busan's chemical composition of sulfate was higher than that of nitrate in summer, whereas nitrate was higher than sulfate in Seoul. The ratios of NO₃^- to SO₄^2-(N/S ratio) showed lower in Busan approximately by a factor of 1/2(half of N/S ratio) in Busan compared with that in Seoul. Others such as synoptic characteristics and emission differences were also discussed in this study.