대기 건식침적 측정을 위한 물표면 매체 포집기의 성능평가

이승묵,정장표 이화여자대학교 환경문제연구소 1998 이화환경연구 Vol.2 No.-

원형 모양의 물 표면 매체 포집 기기가 대기중의 가스와 입자들의 건식 침적 유동량을 측정하기 위하여 개발되었다. 포집 기기는 날카로운 모서리와 아크릴로 만들어진 판(지름 37cm, 깊이 0.5cm)에 순환시스템을 통하여 계속해서 물이 공급되어지는 구조로 설계되어 있다. 물 표면 매체 포집 기기의 성능을 평가하기 위하여 황산염, 칼슘 그리고 납의 유동량(flux)을 일리노이주(Illinois) 시카고(Chicago)에서 측정하였다. 대기중 입자상의 건식 침적 유동량을 측정하기 위하여 날카로운 모서리를 지닌 침적판 위에 놓여진 그리스 표면 매체를 물 표면 매체와 동시에 대기중에 노출하였다. 통계학적 분석 결과에 의하면 칼슘과 납의 유동량(flux)은 두표면 매체에서의 침적량이 동일한 것으로 분석 평가되어져 물과 그리스 표면 매체는 입자상의 침적에 대해서는 동일한 특성을 지니는 것으로 판명될 수 있었다. 황산염의 건식 침적의 경우, 가스상(SO₂) 과 입자상(SO₄())의 물질이 동시에 물로 침적될 수 있기 때문에 황산염을 시험대상 화합물로 선택하였다. (이산화황은 물 속에서 빠르게 가수 분해되고 황산염으로 산화된다). 이산화황(SO₂ )의 유동량을 물 표면 매체와 그리스 표면 매체사이의 황산염 유동량의 차이에 의하여 결정하였다. 저항모델(resistance model)을 사용하여 계산한 개별 이산화황 기체상 질량전달계수(individual SO₂gas phase mass transfer coefficient)와 대기중의 이산화황 농도를 곱하여 황산염 유동량을 예측하였다. 저항 모델은 질량 전달을 일련의 저항들을 통과하는 전기 및 열적 흐름과의 유사성과 연관지어서 개발한 모델이다. 물 표면 매체 포집기기를 사용하여 직접 측정한 이산화황 유동량을 저항 모델을 사용하여 예측된 유동량들과 잘 일치하였다. 이 결과는 물 표면 매체 포집기기가 대기중에서 가스상과 입자상의 물질로 동시에 존재하는 질소 화합물, PCBs, PAHs 및 수은과 같은 화합물질들의 침적을 측정하는데도 유용하게 쓰일 수 있는 가능성을 시사하고 있다. A circular water surface sampler was developed to measure the dry deposition flux of atmospheric gases and particle. The sampler consists of a sharp edged, acrylic plate, filled with water(37cm in diameter and 0.5cm deep) that is continuously replenished from a reservoir by a pump that maintains a constant water depth. To evaluate the water surface sampler, the flux of sulfate, calcium and lead were measured in Chicago. IL. A sharp edged greased surface was exposed to the atmosphere simultaneously with the water surface to measure the dry deposition flux of atmospheric particles. Calcium and lead fluxes were found to be statistically the same indicating that the water and greased surfaces had the same particulate phase deposition characteristics. Sulfate was also selected as the test compound because it can be deposited to water as both a gas(SO₂) and particulate(SO₄()) from the atmosphere(SO₂is quickly hydrolized and oxidized to SO₄() in water). The flux of SO₂was determined from the difference in the sulfate flux between the water surface and the greased surface. For each sample the calculated SO₂ flux was calculated as the product of the individual SO₂ gas phase mass transfer coefficient calculated using a resistance model multiplied by the ambient SO₂ concentration. A resistance model was developed by analogy to electrical or heat flow through a series of resistances. The SO₂ fluxes measured directly with the water surface sampler agreed well with those predicted with the resistance model. These findings indicate this sampler will be useful for measuring the deposition of other compounds which exist in both the gas and particulate phases like nitrogen, PCBs, PAHs and Hg.

새열기형의 임상적 고찰

김장묵,김대식,백승혁,한동렬,김희중,백병준,오천환 순천향의학연구소 2000 Journal of Soonchunhyang Medical Science Vol.6 No.2

Background and Objectives : Branchial cleft anomalies are encountered rarely in clinical practice. We reviewed medical records of branchial cleft anomalies according to age and sex distribution, site distribution, characteristics of mass on physical examination, location of mass, preoperative diagnosis, type of branchial cleft cyst and report our experience with 25 cases of branchial cleft anomalies. Materials and Methods : A review of medical records was performed on 25 cases of branchial cleft anomalies diagnosed in pathologic report from January, 1990 to March, 2000. Result : Sex distribution was 11 male and 14 female, age distribution was most common in third decade which was 8 cases(32%). Site distribution was predominant in left side(13 cases), and in physical examination, the characteristics of the mass was nontender(76%), mobile(60%), soft(80%). The lesion site was submandibular area in 2 cases, upper 1/3 portion of sternocleidomastoid muscle(SCM) in 2 cases, middle 1/3 portion of SCM in 20 cases and parotid area in 1 case. The preoperative diagnosis was branchial cleft cyst in 16 cases, cervical lymphadenitis in 3 cases, tuberculous lymphadenitis in 3 cases, branchial cleft fistula in 1 case, dermoid cyst in 1 case and parotid mass in 1 case. Among 25 cases, first branchial cleft cyst was seen in 4 cases, second branchial cleft cyst in 20 cases and second branchial cleft fistula in 1 case. Conclusion : The clinical history of recurrent neck inflammatory episodes in young patients and nontender, mobile, soft neck mass should raise the suspicion of this entity. Investigation using CT scanning in combination with aspiration is useful. Treatment of all branchial cleft anomalies is complete surgical excision because there is lack of spontaneous regression, a high rate of recurrent infection, the possibility of other diagnosis, and rare malignant degeneration. Complete removal without complications depends on a good understanding of regional embryogenesis, a knowledge of the surrounding structure, and awareness of the different anatomical presentation.

목재부후성 담자균류 배양균사체의 생물활성 연구 : Antimicrobial,Plant Growth Regletory,Antitomor and enzymatic activities 향균활성, 식물생장조절활성, 항암활성, 효소활성탐색

조수묵,유승헌,신관철 충남대학교 생물공학연구소 1997 생물공학연구지 Vol.5 No.-

목재부후성 담자균류의 배양 균사체의 생물활성을 조사하기 위하여 항균활성, 식물생장조절활성, 항암활성 및 그들이 생산하는 효소활성을 검정한 결과 Coriolus versicolor 5129와 C. pubescens 5131 균주는 그람양성세균에, Lenzites betulina 8029 균주는 그람음성세균에 저지 효과를 나타내었으며 L. betulina 8085 균주는 세균과 진균에 저지 효과를 나타내어 광범위한 항균 spectrum을 보였다. 대부분의 균주가 0.8㎖/㎖ 농도 처리시 배추 및 무의 발아 및 생장을 억제하였으며, 특히 Fomitopsis pinicolor 8059와 Fomitella fraxinea 8084 균주의 경우 생육을 강하게 억제하였다. 그러나, Bjerkandera adusta 8054 균주는 0.4 및 0.2 ㎖/㎖ 농도에서 배추 및 무의 생육을 촉진하였다. 몇종의 목재부후균 다당체를 추출하여 암세포를 이식한 ICR mouse에 투여한 결과 거의 전 균주가 항종양 작용을 나타내었으나 버섯종류 간에 큰 차이를 보였고 그중 L. betulina 8029와 미분류된 8058 균주는 효과가 비교적 높았다. 목재부후균의 세룰로스와 리그닌 분해력은 거의 전 공시균주에서 나타났고 종류간에 역가가 다양하여 강력한 분해균의 선발 가능성을 보였다. For screening of biological activities of culture broth of some wood rotting basidiomycetes, antimicrobial activity, plant growth regulating activity, antitumor activity, and various enzyme activities were checked. Coriolus versicolor 5129 and C. pubescens 5131 strains showed inhibition activity against gram-positive bacteria and Lenzites betulina 8029 strain showed the activity against gram-negative bacteria. L. betulina 8085 inhibited the growth of both bacteria and plant pathogenic fungi. All of tested basidiomycetes inhibited the germination and growth of radish and cabbage at concentration of 0.8 ㎖/㎖. Especially, Fomitopsis pinicolor 8059 and Fomitella fraxinea 8084 showed strong inhibition activity. In contrast, Bjerkandera adusta 8054 stimulated the growth of cabbage and radish at concentration of 0.4 and 0.2 ㎖/㎖. All polysaccharides from tested basidiomycetes showed anti-tumor activity against sarcoma 180 and the stronger antitumor activity was observed in L. betulina 8029 and unidentified 8058 strain. All tested basidiomycetes had also an ability to degrade cellulose and lignin.

메탄올 수용매에서 18-Crown-6와 알칼리 금속이온의 착물 안정도

장승현,박성묵 대구대학교 산업기술연구소 1985 産業技術硏究 Vol.4 No.-

The stabilty constants for the 1:1 complexes of 18-crown-6 with alkali metal ion in 70 wt% CH₃OH and and 30 wt% H₂O are determined conductometrically. In the temperature range between 25℃ and 40℃ the values of the enthalpy and entropy changes can be calculated. It is found that the stability constants of 18-crown-6 with alkali metal cation complexes depended highly on the relatively ratio of cavity size in 18-crown-6 and cation size. And so the stability constants of the complexes are in the order of K^(+)>Rb^(+)>Cs^(+)>Na^(+)>Li^(+). The enthalpy changes in the order of K^(+)>Rb^(+)>Cs^(+)>Na^(+)>Li^(+) and the negative entropy changes also are obtained.

FA/MA 방법에 의한 부산시 부유분진의 오염원 할당

정장표, 이승훈, 윤항묵 경성대학교 환경문제연구소 2000 環境硏報 Vol.10 No.1

The object of this study was to identify source categories of Busan area through FA/MA methodology which contribute to the concentration of suspended particles at receptor. According to the purpose of this study, twenty-seven chemical species such as elements, anions, and total carbon of chirty-six PM10 and TSP data sets sampled at Bumchun receptor site for a 24hr period from May to Aug. 1992, were analyzed and applied to FA/MA model. From this study, the following conclusions were obtained. From the factor analysis for measured data, steel, mill-related, transportation, soil dust resuspension, marine, fuel oil, secondary aerosol source, and etc., of which total variance explained by the identified factors was calculated as 84 ∼ 91%, were identified. And the trend was shown that the more the number of input trace materials was, the more difficult the identifications of factors were, relatively. Selecting the representive tracers for identified factors based on the factor loadings, the following equations were obtained by use of stepwise method in multiple linear regression for the cases. TSP(㎍/㎥) = 27.996+0.033Mg +0.016Cl-+0.O05SO42 Case 1 TSP(㎍/㎥) = 11.779 + 2.013Ti + 0.034Na + 0.026Mg + 0.006ca Case 2 PM10(㎍/㎥) = 3.130+0.O04 SO42 +0.010 Cl- + 1.812Ti Case 1 PM10(㎍/㎥) = -14.028+1.515Ti +0.D38Na + 0.O09 Cl- + 0.003 SO42- Case 2 In comparison with the results of FA/MR model with the change of the newly added input tracers, the case with TSP showed relatively unstable results of factor analysis for the case studies because of insufficient number of data available to complete a factor analysis for the tracers used.

잉어 담즙이 간장에 미치는 영향에 대한 연구

김대중,양승하,안상묵,강상균,김의한 순천향의학연구소 1997 Journal of Soonchunhyang Medical Science Vol.3 No.1

To investigate the effect of Cyprinus carpio bile acid on human liver, concentrated and 10:1 diluted Cyprinus carpio bile acid were injected at the dose of 10ul at mouse tail vein One, three, five, seven and nine days after injection, the mice were sarcificed. The change in hepatic function were estimated by determining GOT, GPT and compared to histologic findings of liver tissue. The results of GOT level was not consistent, but the GPT was significant. From these, we concluded. 1. In concentrated injected group (A), the GPT level was highest in first day and the increased level lasted through observation. 2. In 10:1 diluted injected group (B), the GPT level was only high above normal in first day. Thereafter, the GPT level curiously decreased below the normal, which need more study. 3. Histologic hepatic changes in A group, until 3 days, hepatic cell cord disarrary and marked hepatic cellular degeneration around the central vein were seen. Therefater, although elevated GPT level, the hepatic changes showed only mild regenerated change Histologic hepatic change in B group showed no remarkable change. Above findings suggested that the liver injury was dependent on injected concentration and the hepatic injury, which was observed in early phase, appeared to be reversible. So the hepatic injury by the Cyprinus carpio bile acid appeared complete recovery course without specific complication.

충격관을 이용한 메탄의 연소반응 연구

류시옥,이승철,송병수,황순묵 영남대학교 공업기술연구소 2001 工業技術硏究所論文集 Vol.29 No.1

Study on the ignition of methane fuel system highly diluted with argon was carried out in the temperature range of 1515∼1905K behind a reflected shock wave to investigate the rate coefficients for the reaction CH3+O2=CH3O+O. Ignition delay times were measured by monitoring the light absorption by methyl radical at ca. 214nm and pressure profiles. Computer modeling study of methane oxidation was also performed using a GRI_MECH, version 2.11 mechanism for sensitivity analysis and calculation of ignition delay times. The correlation of τp with the maximum heat release rate (dq/dt)max in the reaction zone was also investigated.

腦動脈瘤 患者에서 血淸 LDL, Total cholesterol, Phospholipids 및 HDL cholesterol 의 動態

黃性守,朴淵默,金乘來 慶北大學校 醫科大學 1980 慶北醫大誌 Vol.21 No.2

지주막하 출혈을 일으킨 뇌동맥류 환자에서 혈청 LDL, total cholesterol, phospholipids 및 HDL cholesterol치를 분석, 정량하여 정상 대조군과 비교, 검토하였다. 뇌동맥류 환자에서 혈청 LDL과 total cholesterol의 평균치(mean±SE)는 각각 286±21㎎/㎗ 및 215±10㎎/㎗로써 대조군에 비하여 상승치를 나타내었으며 내경동맥류에서 현저 하였고 신경학적 장애 소견이 심한 군에서 현저히 상승되어 있었다. 그리고 혈청 phospholipids의 평균치는 149±8㎎/㎗로써 신경학적 장애 소견에 관계없이 대조군에 비해 현저히 감소되었고 내경동맥류와 중대뇌동맥류에서 현저하였다. 뇌동맥류 환자에서 혈청 HDL cholesterol의 평균치는 29±2㎎/㎗, total cholesterol에 대한 HDL cholesterol의 백분비 평균치는 15.1%로써 대조군에 비해 차이 있는 변화는 없었다. On the intracranial aneurysmal patients with subarachnoid homorrhage, serum lipid and lipoprotein values, including LDL, total cholesterol, phospholipids and HDL cholesterol level, were studied. Mean values (mean±SE) of serum LDL and total cholesterol level in aneurysmal group were 286±21㎎/㎗ and 215±10 ㎎/㎗ respectively, showing higher level than those from normal control group, and the levels were more elevated in aneurysmal patients of internal carotid artery and aneurymal patients with severe neurological disorders such as grade 3,4 according to Botterell's classification. In aneurysmal group, serum phospholipids level was decreased remarkably by 149±8 ㎎/㎗ in mean value, compared to control group, and it showed no relationship with neurological deficits. However, it was decreased more in patients with aneurysm of internal carotid and middle cerebral artery. In aneurysmal group, mean value of serum HDL cholesterol level was 29±2㎎/㎗ with percent of HDL cholesterol to total cholesterol, 15.1%. The findings showed no significant difference between aneurysmal and control group.

Korea-Japan Special Symposium : Source Identification and Health Effects of PM2.5 in Seoul, Korea

( Seung Muk Yi ),( Jong Bae Huh ) 한국폐기물자원순환학회(구 한국폐기물학회) 2007 한국폐기물자원순환학회 춘계학술발표논문집 Vol.2007 No.-

Source Identification and Health Effects of PM<SUB>2.5</SUB> in Seoul, Korea

Seung-Muk Yi,Jong-Bae Huh 한국대기환경학회 2007 한국대기환경학회 학술대회논문집 Vol.- No.-