플라즈마 화학증착법을 이용하여 Corning glass 1737 기판에 안티몬 도핑 산화주석 박막을 증착하였다. 플라즈만 화학증착시 반응변수에 따른 박막의 결정상 및 형성된 표면거칠기에 대하여 XRD와 AFM을 이용하여 검토하였다. 반응온도 450˚C, 유입가스비 R[PSbClPSnCl4]=1.12, r.f. power 30W에서 비교적 결정성이 뛰어난 박막을 얻을 수 있었다. 화학증착법(TCVD)에 비해 플라즈마 열화학증착법(PECVD)으로 얻은 박막의 표현형상이 보다 균일하였다. 안티몬 도핑농도가 증가할수록, 증착온고가 낮을수록, 증착두께가 작을수록 박막의 표면거칠기가 보다 감소하였다.

Microbial mats, the yellow and reddish brown deposits formed from the mine drainage, occur on the bottom of drain and mine tailing pond of the Ilkwang mine in Pusan, Korea. The constituents of microbial mats and their biomineralization were studied by using XRD, IR, and SEM-EDX. The upper part of the microbial mat is yellow-colored and composed of tube-shaped and small spheroid bacterial materials, which are mainly made up of amorphous and poor-crystalline iron-oxide minerals. The shape and composition of bacterial materials suggest that they are probably belong to iron-oxide mineral aggregates. The iron-oxide minerals of the yellow microbial mats are mainly goethite, but those of the reddish brown microbial mats contain abundant hematite along with goethite. This implies that with the evolution of biomats, goethite may be transformed to hematite.

Environmental problems caused by certain geologic conditions include pollution of soil by heavy metal, acidization of soils, acid mine drainage, ground-water pollution, and natural radioactivity, as well as geological hazards such as landslide and subsidence. The acid mine drainage contains large amount of heavy metals and, therefore, cause serious pollution onto the nearby drainage systems and soils. In spite of this prospective environmental danger, few studies have been done on the acid mine drainage derived from non-metallic ore deposits such as pyrophyllite(Napseok) deposits. The sulfide-bearing pyrophyllite ores, alteration zones, and mine tailings of pyrophyllite deposits produce acid mine drainage by the oxidation of weathering. Compared to the fresh host rocks, the ores and altered rocks of pyrophyllite deposits produce acidic solution which contain higher amount of heavy metals because of their lower buffering capacity to acid solution. The pHs of mine water and nearby stream water of pyrophyllite deposits are 2.1∼3.7, which are strongly acidic and much lower than that (6.2∼7.2) of upstream water and than that (6.8∼7.6) of the stream water derived from the non-mineralized area. This study reveals that this acid mine drainage can affect the downstream area which is 8km far from the pyrophyllite deposits, even though the drainage is diluted with abundant non-contaminated river water. This suggests that not only acid mine drainage but also the sulfide-bearing sediments originated from the pyrophyllite deposits move downstream and form acidic water through continuous oxidation reaction. The heavy metals such as Pb, Zn, Cu, Cd, Ni, Mn and Fe are enriched in the mine water of low pH, and their contents decrease as the pH of mine water increases because of the influx of fresh stream water. Soils of the pyrophyllite deposits are characterized by high contents of heavy metals. The stream sediments containing the yellowish brown precipitates formed by neutralization of acid mine drainage occur in all parts of the stream derived from the pyrophyllite deposits, and the sediments also contain high amounts of heavy metals. In summary, the acid mine drainage of the pyrophyllite deposits is located in the upstream part of Hoidong water reservoir in Pusan contains large amounts of heavy metals and flows into the Hoidong water reservoir without any purification process. To protect the water of Hoidong reservoir, the acid mine drainage should be treated with a proper purification process.

광릉쥐오줌풀과 넓은잎쥐오줌풀을 표고가 다른 지역에서 생육시켜 유효성분의 차이를 조사하였다. 정유함량은 산지에 따른 차이가 인정되지 않았으나, 정유조성은 미미한 차이를 보였다. 양적으로 많이 함유된 성분은 광릉쥐오줌풀에서는 모든 지역에서 bornyl acetate 및 sesquiterpene alcohol이었고, 넓은잎쥐오줌풀에서는 borneol, bornyl actate 및 β -sesquiphellandrene이었다. 유럽산과 네팔산의 주요 약리성분으로 알려져 있는 valepotriate 화합물 중 valtrate가 광릉쥐오줌풀 및 중국산쥐오줌풀에서 미량 검출되었으며, 이의 함량은 산지에 따라 큰 차이는 없었다.

광릉쥐오줌풀 뿌리의 정유성분 조성 및 정유의 특성을 더욱 정밀하게 조사하기 위하여 수증기 증류에 의해 얻어진 정유성분을 산성, 페놀성, 염기성 및 중성성분 분획으로 분리하여 분획별 향의 관능평가 및 분획물의 조성을 조사한 결과는 다음과 같다. 1. 광릉쥐오줌풀 뿌리의 정유성분분획물 각각의 조성은 중성성분 분획물 92%, 산성성분 분획물 6%, 염기성성분 및 페놀분획물은 각각 1% 미만이며 각 분획물의 향특성은 중성성분 분획은 sweet-balsamic, woody, musky, medicinal 향이며 산성성분 분획은 sweat-socks, valeric-like, cheese-like 향이었다. 2. 중성성분분획물을 용매의 극성을 달리하여 분획한 결과 용출 용매별 분획 비율은 ethyl ether분획물이 44%, pentane : ethyl ether분획물 34%, pentane과 methanol분획물은 각각 11%였다. 분획별 향 특성은 ethyl ether 분획물은 woody, medicinal 향이며 pentane :. ethyl ether 분획물은 sweet-balsamic, woody, herb-like향 특성을 나타내었다. 극성을 달리한 용출용매별 분획물에서 확인된 성분은 ethyl ether 분획물에서 valeranone 등 12종, pentane : ethyl ether(9 : 1) 분획물에서는 bornyl acetate등 26종, pentane 분획물에서 camphene등 43종을 확인하였다. 3. 산성성분분획에서는 n-butanoic acid 외 44종을 확인하였고 그 중 양적으로 많은 성분은 3-methyl butanoic acid 42.1%, dimethoxy-2-propanoic acid 11.5%, 5-ethyldihydro-2H-furanone 5.7% 등 이었다.