연안도시지역 해풍지연이 오존분포에 미치는 영향

오인보,김유근,황미경 한국대기환경학회 2004 한국대기환경학회지 Vol.20 No.3

The late sea-breeze and its impacts on ozone distributions were investigated during April to September from 1998 to 2002, in the Busan metropolitan area (including surrounding areas) using the surface ozone concentrations (obtained at 9 monitoring sites), local meteorological variables (obtained near the shore), together with synoptic data. The urban scale ozone concentration was also simulated using the MM5/UAM-V to better understand the role of late sea-breeze in Busan. The results from observation study showed that most of the late sea-breeze occurred when weak offshore synoptic flow (northwesterly) suppressed development of sea-breeze, and the ozone concentration level and frequencies exceeding ozone standard increased with the onset time of sea breeze. We also found that the late sea-breeze clearly induces relatively weak wind speed and high temperature during the daytime. As a result it enhances the photochemical ozone accumulation and delays the occurrence time of the averaged maximum ozone concentrations. The results of simulation for high ozone episode (24 August, 2001) by MM5/UAM-V revealed that the late sea-breeze interacted with weak offshore synoptic wind can contribute significantly to high ozone concentration in the coastal urban area. The simulated horizontal and vertical distribution of ozone concentration indicated that ozone can be accumulated over the sea under stagnant condition and return to the land in the late afternoon with the sea breeze, suggesting both the relationship between late sea-breeze and recirculation and the importance of late sea-breeze effects influencing severe ozone pollution in Busan.

산성강하물의 침착량과 동태 해명에 관한 연구 -춘천과 서울 강우의 화학조성 비교 : Comparison of Chemical Composition of Rain Water between Chunchon and Seoul

김만구,강미희,임양석,박기준,황훈,이보경,홍승희,이동수 江原大學校 附設 環境硏究所 1999 環境硏究 Vol.16 No.-

The rain water samples were collected at Chunchon and Seoul by using wet only automatic sampler from January 1996 through December 1997. The daily base rain water samples collected over than 95% rainy events during the whole period. The samples were measured both pH and conductivity, and were analysed major ionic components, SO₄^(2-), NO₃^(-), Cl^(-), NH₄^(+), Ca^(2+), Na^(+) and K ^(+), by ion chromatography. In 1996, about 77% sampled rain water showed below pH 5.6 and the 60% of rain water was lower than pH 5.0. The volume weighted average pH was 4.7 at all sites. In 1997, the volume weighted average pH was 4.6 and 4.9 at Seoul and Chunchon, respectively. Among the rain water samples, 87% and 55% of samples showed below than pH 5.6 and 5.0, respectively. The pH value of Chunchon was significantly (p<0.05) lower than Seoul at the rain samples for less than 20 ㎜ rainfall. However conductivity of the rain samples were 20.9 μS/㎝ for 1996 and 27.7 μS/㎝ for 1997 at Seoul, and 19.1 μS/㎝ for 1996 and 14.1 μS/㎝ for 1997 at Chunchon. H₂SO₄AND HNO₃CONTRIBUTED 65.9% and 29.6% of free acidity at Seoul, respectively. The ratio of [NO₃^(-)]/[nss-SO₄^(2-)] were 0.43 at Seoul and 0.51 at Chunchon for rain samples for less than 20 ㎜ rainfall. The annual wet deposition of Cl^(-), NO₃^(-), SO₄^(2-), H^(+), Na^(+), NH₄^(+), K ^(+), Mg^(2+) and Ca^(2+), respectively, 568.8 ㎏/㎢, 1489.3 ㎏/㎢, 3184.8 ㎏/㎢, 20.9 ㎏/㎢, 249.4 ㎏/㎢, 1091.2 ㎏/㎢, 189.8 ㎏/㎢, 90.2 ㎏/㎢, and 702.4 ㎏/㎢ at Seoul for 1996; 656.4 ㎏/㎢, 2029.7 ㎏/㎢, 3280.7 ㎏/㎢,27.2 ㎏/㎢, 229.4 ㎏/㎢, 1063.9 ㎏/㎢, 106.9 ㎏/㎢, 7802 ㎏/㎢, and 645.3 ㎏/㎢, at Seoul for 1997; 116.9 ㎏/㎢, 983.3 ㎏/㎢, 1797.0 ㎏/㎢, 21.4 ㎏/㎢, 83.2 ㎏/㎢, 648.1 ㎏/㎢, 78.0 ㎏/㎢, 22.2 ㎏/㎢ and 368.8 ㎏/㎢ at Chunchon for 1996; 100.2 ㎏/㎢, 1077.6 ㎏/㎢, 1754.0 ㎏/㎢, 13.4 ㎏/㎢, 146.0 ㎏/㎢, 602.3 ㎏/㎢, 88.8 ㎏/㎢, 16.2 ㎏/㎢ and 206.8 ㎏/㎢ at Chunchon for 1997.

서울과 부산지역 기상의 영향을 제거한 오존농도 추세

김유근,오인보,황미경 한국대기환경학회 2003 한국대기환경학회지 Vol.19 No.5

Surface ozone concentrations are highly sensitive to meteorological variability. Therefore, in order to reveal the long-term changes in ozone due to the changes in precursor emissions, we need to remove the effects of meteorological fluctuations on the annual distribution of surface ozone. In this paper, the meteorologically adjusted trends of daily maximum surface ozone concentrations in two major Korean cities(Seoul and Busan) are investigated based on ozone data from II(Seoul) and 6(Busan) sites over the period 1992~2000. The original time series consisting of the logarithm of daily maximum ozone concentrations are splitted into long-term, seasonal and short-term component using Kolmogorov-Zurbenko(KZ) filter. Meteorological effects are removed from filtered ozoned ozone series using multiple linear regression based on meteorologcial variables. The long term evolution of ozone forming capability due to changes in precursor emission can be obtained applying the KZ filter to the residuals of the regression. The results indicated that meteorologically adjusted long-term daily maximum ozone concentrations had a significant upward trend(Seoul:+3.02%yr¹, Busan: +3.45%yr¹). These changes of meteorologically adjusted ozone concentrations represent the effects of changing background ozone concentrations as well as the more localized changes in emissions.

창원지역에서의 대기오염물질 배출량 산정

김유근,박상철,문윤섭,오인보,황미경 부산대학교 환경문제연구소 2002 環境硏究報 Vol.20 No.-

Emissions of air pollutants (TSP, SO2, NO2, CO, and HC) was estimated in Changwon city that has the industrial complex and basin terrain. We found that the emissions of TSP, SO2, NO2, CO, and HC were 897 tons, 3,287 tons, 5,706 tons, 10,057 tons, and 1,470 tons for a year, respectively and the main source of air pollutants were vehicle. The ratios of vehicle emissions to total emissions ware TSP 63.8%, SO2 26.1%, NO2 65.5%, CO 91.0%, HC 94.4%. The ratios of industry emissions to total emissions were TSP 30.8%, SO2 60.2%, NO2 25.2%, CO 6.4%, HC 3.7%. The ratio of life emissions to total emissions are TSP 5.4%, SO2 13.7%, NO2 9.3%, CO 2.6%, HC 1.9%. The concentration distributions of air pollutants simulated by ISCST3 model were similar to its emission distributions, and relatively high concentrations of air pollutants occurred in the Palyong-dong (industrial area) and Banlim and Chungang (residual area).

Decursin inhibits UVB-induced MMP expression in human dermal fibroblasts via regulation of nuclear factor-κB.

Hwang, Bo-Mi,Noh, Eun-Mi,Kim, Jong-Suk,Kim, Jeong-Mi,Hwang, Jin-Ki,Kim, Hye-Kyung,Kang, Jae-Seon,Kim, Do-Sung,Chae, Han-Jung,You, Yong-Ouk,Kwon, Kang-Beom,Lee, Young-Rae D.A. Spandidos 2013 INTERNATIONAL JOURNAL OF MOLECULAR MEDICINE Vol.31 No.2

<P>Decursin, a coumarin compound, was originally isolated from the roots of Angelica gigas almost four decades ago, and it was found to exhibit cytotoxicity against various types of human cancer cells and anti-amnesic activity in vivo through the inhibition of AChE activity. However, the anti-skin photoaging effects of decursin have not been reported to date. In the present study, we investigated the inhibitory effects of decursin on the expression of matrix metalloproteinase (MMP)-1 and MMP-3 in human dermal fibroblast (HDF) cells. Western blot analysis and real-time PCR revealed that decursin inhibited the ultraviolet (UV)B-induced expression of MMP-1 and MMP-3 in a dose-dependent manner. Decursin significantly blocked the UVB-induced activation of nuclear factor-κB (NF-κB). However, decursin showed no effect on MAPK or AP-1 activity. In this study, decursin prevented the UVB-induced expression of MMPs via the inhibition of NF-κB activation. In conclusion, decursin may be a potential agent for the prevention and treatment of skin photoaging.</P>

WO₃ NANOPLATES AS AN ANODE MATERIAL FOR IMPROVED LITHIUM ION STORAGE PROPERTIES

Bo-Mi HWANG,Si-Jin KIM,Young-Woo LEE,Han-Chul PARK,Da-Mi KIM,Kyung-Won PARK 한국신재생에너지학회 2013 AFORE Vol.2013 No.-

Protein tyrosine phosphatase controls breast cancer invasion through the expression of matrix metalloproteinase-9

( Bo Mi Hwang ),( Hee Suk Chae ),( Young Ju Jeong ),( Young Rae Lee ),( Eun Mi Noh ),( Hyun Zo Youn ),( Sung Hoo Jung ),( Hong Nu Yu ),( Eun Yong Chung ),( Jong Suk Kim ) 생화학분자생물학회(구 한국생화학분자생물학회) 2013 BMB Reports Vol.46 No.11

The expression of matrix metalloproteinases (MMPs) produced by cancer cells has been associated with the high potential of metastasis in several human carcinomas, including breast cancer. Several pieces of evidence demonstrate that protein tyrosine phosphatases (PTP) have functions that promote cell migration and metastasis in breast cancer. We analyzed whether PTP inhibitor might control breast cancer invasion through MMP expression. Herein, we investigate the effect of 4-hydroxy- 3,3-dimethyl-2H benzo[g]indole-2,5(3H)-dione (BVT948), a novel PTP inhibitor, on 12-O-tetradecanoyl phorbol-13-acetate (TPA)-induced MMP-9 expression and cell invasion in MCF-7 cells. The expression of MMP-9 and cell invasion increased after TPA treatment, whereas TPA-induced MMP-9 expression and cell invasion were decreased by BVT948 pretreatment. Also, BVT948 suppressed NF-kB activation in TPA-treated MCF-7 cells. However, BVT948 didn`t block TPA-induced AP-1 activation in MCF-7 cells. Our results suggest that the PTP inhibitor blocks breast cancer invasion via suppression of the expression of MMP-9. [BMB Reports 2013; 46(11): 533-538]

Truncated octahedral LiMn₂O₄ cathode for high-performance lithium-ion batteries

Hwang, Bo-Mi,Kim, Si-Jin,Lee, Young-Woo,Park, Han-Chul,Kim, Da-Mi,Park, Kyung-Won Elsevier 2015 Materials chemistry and physics Vol.158 No.-

<P><B>Abstract</B></P> <P>Spinel-type LiMn<SUB>2</SUB>O<SUB>4</SUB> has been studied as a promising cathode candidate capable of replacing LiCoO<SUB>2</SUB> in lithium-ion batteries. Here we demonstrate LiMn<SUB>2</SUB>O<SUB>4</SUB> powders prepared by a calcination process as a function of temperature and time. LiMn<SUB>2</SUB>O<SUB>4</SUB> structure electrode prepared at 700 °C for 10 h forms a truncated octahedral structure consisting of {111} and {100} surfaces. In particular, the truncated octahedral structure exhibits the crystal orientation toward dominant {111} surfaces of octahedral structure to minimize Mn dissolution and a particular portion of {100} surfaces of the truncated structure to stabilize the electrode. The truncated octahedral structure shows excellent discharge capacity (∼132.14 mAh g<SUP>−1</SUP> at 1 C), high capacity retention (∼100%) and durable cycling performance (after 100 cycle) compared to the octahedral shaped electrodes. In particular, the truncated octahedral structure of LMO-700-10h exhibits the crystal orientation toward majority {111} surfaces of octahedral structure and minority {100} surfaces.</P> <P><B>Highlights</B></P> <P> <UL> <LI> LiMn<SUB>2</SUB>O<SUB>4</SUB> nanostructure materials were prepared for Li-ion batteries. </LI> <LI> LiMn<SUB>2</SUB>O<SUB>4</SUB> nanostructure materials were controlled by calcination temperatures. </LI> <LI> The truncated octahedral nanostructure consists of {111} and {100} surfaces. </LI> <LI> The truncated octahedral structure shows an excellent performance. </LI> </UL> </P>

Preventive Effects of Standardized Siegesbeckia orientalis Extract and Its Active Compound Kirenol on TNF-α-induced Muscle Atrophy in L6 Myotubes

Mi-Bo Kim,Changhee Kim,Sun-kyu Lee,Jieun Hwang,Jae-Kwan Hwang 한국식품영양과학회 2016 한국식품영양과학회 학술대회발표집 Vol.2016 No.10

한국토종닭 3원 교잡종의 부화 및 육성 능력 (pp.399-404)

강보석(Bo-Seok Kang),홍의철(Eui-Chul Hong),김학규(Hak-Kyu Kim),유동조(Dong-Jo Yu),박미나(Mi-Na Park),서보영(Bo-Young Seo),추효준(Hyo-Jun Choo),나승환(Seung-Hwan Na),서옥석(Ok-Suk Seo),황보종(Jong Hwang bo) 韓國家禽學會 2010 韓國家禽學會誌 Vol.37 No.4

본 시험은 한국토종닭 3원 교잡종의 부화 및 육성 능력을 보고자 수행하였다. 공시계는 국립축산과학원에서 생산된 종란을 인수하여 부화시킨 3원 교잡종 병아리 암컷이다. 4가지 교배 조합으로 생산된 360수의 암평아리들을 3반복으로 반복당 30수씩 완전 임의배치하였다. 4개의 교배 조합은 A) 토착겸용종 C계통×재래종 Y계통×토착겸용종 C계통, B) 토착겸용종 C계통×재래종 L계통×토착겸용종 C계통, C) 토착 겸용종 C계통×재래종 G계통×토착겸용종 C계통, D) 토착겸 용종 C계통×재래종 W계통×토착겸용종 C계통이다. 수정률은 A, B, C 및 D에서 각각 89.8, 91.2, 92.4 및 92.8%였으며, 부화율은 각 계통에서 69.8, 70.7, 75.5 및 77.4%였다. 육성률은 계통간 유의적인 차이가 없었다(P>0.05). 20주령 체중은 B계통에서 높게 나타났으며(P<0.05), 0~20주령까지의 사료 요구율은 4계통에서 유의적인 차이는 없었다(P>0.05). 이런 결과들은 한국토종닭 3원 교잡종의 부화 및 육성 성적에 대한 기초적인 자료로서 이용될 것이라 사료된다. This work was conducted to evaluate the hatching and growing performance of Korean native chicken (KNC) 3 strains crossbred. A total of 360 female pullets were produced from CY × C (A), CL × C (B), CG × C (C) and CW × C (D) crossbred kept in National Institute of Animal Science, Korea. Hatchability of A, B, C and D were 69.8, 70.7, 75.5 and 77.4%, respectively. Livability were not significantly different by 20 weeks among 4 strains. Body weight B was high compared to other strains at 20 weeks. The feed conversion ratio of 4 strains was no significantly different among strains at 20 weeks. These results suggested the basic data that needed to develope the new strains.