• 한국지반환경공학회 논문집
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• 제8권4호
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• pp.41-45
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• 2007

바이오필터의 운전에 있어 큰 표면적, 높은 한계 역압력을 가지고 있는 충진 담체의 선택은 매우 중요하다. 본 연구의 목적은 황산화 세균을 분리하고 분리된 황산화 세균과 바이오필터를 이용해 담체 종류에 따른 황화수소의 제거특성을 조사하는 것이며 연구결과는 다음과 같다. 1) 전남 화순의 폐탄광 폐수에서 Thiobacillus sp. IW.를 분리하였다. 2) 다양한 담체를 이용해 유입농도, 공간속도에 따른 바이오필터의 황화수소 제거특성 및 압력손실 변화 살펴본 결과 무기성 담체가 유기성 담체에 비해 우수한 성능을 나타내었다. 3) 무기성 담체 중에서는 섬유상, PU 담체가 다른 담체에 비해 우수한 성능을 나타내었다.

• 화훼연구
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• 제18권3호
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• pp.171-178
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• 2010

수출용 접목선인장 '황월'의 기존에 사용되는 배지인 피트모스 보다 가격이 낮으며, 생육이 피트모스와 비슷한 배지를 선발하고자 7가지 종류 배지 (피트모스, 배양토 BM6, 코코피트, 하이드로크레이, 하이드로볼, 휴가토, 버미큘라이트)에 재배하여 배지의 이화학적 성분과 생육변화를 조사하였다. 배지의 이화학적 분석결과로는 코코피트가 식재 90일 후에도 이화학적 성분의 변화가 거의 없어 안정적이었으며, 하이드로볼이 보수력이 높은 것으로 조사되었다. 수출용 접목선인장 '황월'의 생육조사 결과 유기질 배지에서 대조구인 피트모스와 비슷한 생육을 보인 배지는 코코피트 였으며, 무기질 배지에서는 휴가토, 버미큘라이트, 하이드로클레이가 대체적으로 양호한 생육을 보였다. 그러나 무기질 배지는 무게가 가벼워 식물식재 후 이동 시 쓰러지는 단점이 있었다. 피트모스와 비슷한 생육조건과 낮은 가격을 가진 배지로는 유기질 배지인 코코피트와 수태를 감싸지 않고 사용할 수 있는 무기질 배지인 무게가 상대적으로 무겁고 값이 낮으며 국내 생산이 되는 하이드로볼이 수출용 선인장 재배 배지로 적합할 것으로 판단되었다.

• 한국인쇄학회지
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• 제29권2호
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• pp.83-92
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• 2011

A inorganic powder EL lamp was made by screen printing technique with phosphor ink and dielectric ink. The thickness change of a phosphor ink layer and a dielectric ink layer were not influenced on dielectric content, but rely on phosphor size and vehicle. Once finishing screen printing technique with phosphor ink and dielectric ink, and its surface has been printed again before not drying of phosphor ink and dielectric ink. Then phosphor ink and dielectric ink were not transferred. The electric capacity of inorganic powder EL lamp was more influenced on dielectric content than the thickness of dielectric ink layer, and it was more dependent on the thickness of phosphor ink layer than the thickness of dielectric ink layer.

• 한국인쇄학회지
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• 제29권2호
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• pp.33-44
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• 2011

The inorganic powder EL lamp was made by screen printing technique with a phosphor ink and a dielectric ink. The thickness of a phosphor ink layer and a dielectric ink layer is $35{\mu}m$ and $54{\mu}m$ respectively. A increasing ratio of the luminance of inorganic powder EL lamp to be a 1P1PD-phosphor ink layer in which increased voltage at constant frequency is higher 12% than when increased frequency at constant voltage. It is higher 57% than when increased frequency at constant voltage that the rate of increase of the luminance of inorganic powder EL lamp to be a 2PD-phosphor ink layer in which increased voltage at constant frequency. Finally, when increased voltage at constant frequency, a increasing ratio of the luminance of inorganic powder EL lamp to be a 2PD-phosphor ink layer is higher about 40% than that to be a 1P1PD-phosphor ink layer.

• Applied Biological Chemistry
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• 제14권1호
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• pp.99-102
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• 1971

Saccharomyces rouxii $T_9$의 생육에 있어서 질소원 및 무기염류의 영향을 실험한 결과는 아래와 같다. (1) 무염배지의 경우 유기질소원으로서는 peptone을 $2.5{\sim}5.0%$ 첨가했을때 균의 생육이 가장 양호하였으며 무기질소원으로서는 $(NH_4)_2HPO_4$를 1.0% 첨가했을때 가장 양호하였다. (2) 20% 식염함유배지의 경우 유기질소원으로서는 yeast ext.를 1.5% 첨가했을때 가장 양호하였으며 무기질소원으로서는 urea를 5% 첨가 했을매 가장 양호하였다. (3) 무기염류로서 $NaNO_3$는 무염배지의 경우 1% 첨가했을때 가장 양호하였으나 20% 또 식염함유배지의 경우에는 26% 첨가했을 때보다 5%첨가했을때 더욱 양호 하였다. (4) $MgSO_4$와 $CaCl_2$는 0.5% 첨가한 경우 무염배지에서 보다도 20% 식염함유 배지에서 더욱 효과가 있었으며 $MgCl_2$는 26% 식염함유배지에 1%첨가 했을때 가장 효과가 있었다.

• 한국원자력학회:학술대회논문집
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• 한국원자력학회 1999년도 춘계학술발표회요약집
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• pp.318-318
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• 1999

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2002년도 International Meeting on Information Display
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• pp.825-827
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• 2002

The polymer encapsulation of white inorganic $TiO_2$ pigment particles was prepared by a two stage dispersion polymerization technique for applications in electrophoretic displays (EPDs). In order to give functionality for inorganic pigment particles in the EPD, we have investigated the density of the polymer encapsulated $TiO_2$ particles. The average density of the polymer encapsulated $TiO_2$ particles was 2.2 at 25$^{\circ}C$. The average density of the polymer encapsulated $TiO_2$ particles is suitable to 1.7, due to density matching with suspending media. Therefore, we will attempt density compatibility of dispersion polymerization technique for encapsulation of $TiO_2$ particles in suspending media.

• 한국자원식물학회지
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• 제28권4호
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• pp.533-540
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• 2015

Germination properties, leachate electrical conductivity (EC), and inorganic compound leaching were analyzed to ascertain the storage ability and change of physiological characteristics during storage of Hippophae rhamnoides seeds. Seeds were placed in an incubator at 25℃ and sown in different soil media (sand, vermiculite and horticultural substrate) after being stored for 6, 18 and 30 months at 2℃. All germination properties decreased in accordance to an increase of the seed storage period. Compared with the seed storage for 18 months, germination percentage (GP), germination performance index (GPI), and germination value (GV) of seeds stored for 30 months decreased by more than 50%. When the seeds were sown in different soil media in a greenhouse, those germination properties were similar to the seeds germinated in an incubator, and mean germination time, GPI and GV had a significant difference except GP among soil media. EC and inorganic ion concentration had a strong positive correlation with the seed storage period, but the ratios of inorganic ions from stored seeds revealed that K⁺/Mg²⁺ and Na⁺/Mg²⁺ were inversely correlated with the storage period.

• 한국재료학회지
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• 제27권1호
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• pp.12-18
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• 2017

Transparent organic-inorganic hybrid hard coating films were prepared by the addition of $SiO_2$ or $ZrO_2$, as an inorganic filler to improve the hardness property, filler was highly dispersed in the acrylic resin. To improve the compatibility in the acrylic resin, $SiO_2$ or $ZrO_2$ is surface-modified using various silanes with variation of the modification time and silane content. Depending on the content and kind of the modified inorganic oxide, transparent modified inorganic sols were formulated in acryl resin. Then, the sols were bar coated and cured on PET films to investigate the optical and mechanical properties. The optimized film, which has a modified $ZrO_2$ content of 4 wt% markedly improved in terms of the hardness, haze, and transparency as compared to neat acrylate resin and acrylate resin containing modified $SiO_2$ content of 8 wt%. Meanwhile, the low transparency and high haze of these films slowly appeared at $SiO_2$ content above 10 wt% and $ZrO_2$ content of 5 wt%, but the hardness values were maintained at 2H and 3H, respectively, in comparison with the HB of neat acrylate resin.

• 한국물환경학회지
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• 제31권1호
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• pp.42-48
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• 2015

This study focused on effective decomposition methods for low concentrated organic compounds from the reuse of industrial wastewater, and confirmed the possibility through photocatalyst media. Photocatalyst immobilized media was developed to carry on this experiment which confirmed the removal possibility of low concentrated organic compounds. Considering the stability and efficiency of photocatalyst immobilization, inorganic support, hollow bead, and $TiO_2$ nano powder were used. As a result of the removal experiment, the removal efficiencies of acetonitrile, ethanol, IPA(Isopropyl alcohol), methanol were above 75% after 15 minutes while those of acetone, acetaldehyde, urea were 10%, 45%, 20%, respectively after 60 minutes. If further studies were made to increase the surface area of the photocatalyst immobilized media, the efficiency of the removal of low concentrated organic compounds can be improved and this solution can also be used in an actual treatment process.