• 한국초지조사료학회지
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• 제23권3호
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• pp.169-178
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• 2003

Orchardgrass 및 white clover의 단파 및 혼파재배에서 미량요소 붕소(B)의 시비수준별 목초의 생육상, 뿌리/근류 형성, 수량성, 영양성분/무기양분의 함량 및 초종간 경합지수 등에 미치는 영향을 구명하였다. 처리내용은 다양 및 미량요소 시비를 동일하게 한 조건에서 5 수준의 붕소 처리: 1) $B_{0}$ ; 0.0, 2) $B_1$; 0.2, 3) $B_2$; 2.0. 4) $B_3$; 6.0, 5) B$_4$; 15.0me B/pot로 glasshouse에서 시험으로 수행하였다. 본 III보에서는 목초 중 질소화합물(조/순단백질 및 수용성 N-화합물)의 함량 및 이들의 수량성 등에 미치는 영향을 검토하였다. 1. 단파재배에서 white clover는 무추비시 $B_{0}$ 와 $B_4$ 처리구는 함량 감소와 N-결핍증상을 보였다. 이에 비해서 $B_2$ 처리구는 이들의 함량이 양호하였으며 추비(특히 N)시보다 순단백질 함량이 더 높았고 이에 따라서 순단백질/수용성 질소화합물의 함량비도 높았다. 추비(특히 N)시에는 B-처리별 조/순단백질의 함량차이가 상대적으로 경미하였다. 2. 혼파재배에서는 추비(특히 N)로 인한 white clover 생육의 열세로 단파재배의 경우와는 다소 다른 B 시비효과를 보였으며, 조/순단백질 함량이 단파보다는 낮았다. 그러나 적합한 B 시비($B_2$)의 시비효과는 단파재배시와 같이 양호하였다. orchardgrass에 대한 붕소의 시용효과는 단파 및 혼파재배 공히 $B_2$, 처리구가 순단백질의 함량 제고에 다소 긍정적 효과를 보였으나 white clover보다 상대적으로 경미하였다. 3. 적합한 B 시비($B_2$)는 white clover의 건물 수량에 미치는 효과보다 조/순단백질의 수량에 미치는 효과가 상대적으로 더 높았다. N-화합물의 함량과 이들의 수량에 미치는 붕소의 시비효과는 초종, 단파와 혼파재배, 그러고 추비의 시비조건에 따라서 차이가 있었다

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2001년도 총회 및 춘계학술발표회
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• pp.136-139
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• 2001

In this study, we have examined potential degradation of MTBE (methy1 tert-butyl ether) by pure culture ENV425 and mixed culture isolated from gasoline contaminated soil using n-butane as the sources of carbon and energy. The results described in this study suggest that MTBE is degraded cometabolically by ENV425 and mixed culture grown n-butane, and the disappearance of TBA after complete degradation of MTBE suggest the further degradation of TBA. Butane and MTBE degradation was completely inhibited by acetylene, which indicated that both substrates were degraded by butane-utilizing bacteria. MTBE was degraded ENV425 and mixed culture grown n-butane, and TBA (tert-butyl alcohol) was produced as product of MTBE oxidation. TBA production was accounted 54.7% and 58.6% for MTBE oxidation by ENV425 and mixed culture, respectively. The observed maximal transformation yield (T$_{y}$) were 44.7 and 34.0 (nmol MTRE degraded/$\mu$mol n-butane Utilized) by ENV425 and mixed culture, respectively.y.

• Journal of Periodontal and Implant Science
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• 제26권1호
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• pp.143-160
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• 1996

The purpose of this study was to evaluate the response in aspect of attachment and growth rate of osteoblasts and growth rate of osteoblasts and human gingival fibroblasts to the commercially pure titanium(CP titanium)and titanium alloy(Ti-6AI-4V) that are used widely as implant materials, and to obtain the basic information to ideal implant materials. In the studly, commercially pure titanium in first test group, titanium alloy(Ti-6AI-4V) in second test group, cobalt-chrome-molybdenum alloy(Co-Cr-Mo alloy) in positive control group, and tissue culture polystyrene plate in negative control group were used. The results of this study were as follows. 1. Bone marrow cells cultured on CP titanium and Ti-6Al-4V showed significantly greater attachment and growth rate(p(0.05) compared to Co-Cr-Mo alloy in each time. 2. There were no significant differences(p>0.05) in attachment and growth rate of bone marrow cells cultured on CP titanium and Ti-6AI-4V or tissue culture plate. 3. Most bone marrow cells cultured on CP titanium, Ti-6Al-4V and tissue culture plate were attached well to each substratum in first 2days, and then, grew at higher growth rate. On the other hand, some cells cultured on Co-Cr-Mo alloy failed to attach in first 2 days, and then, attached cells grew at lower growth rate than other groups. 4. Attachment and growth rates of gingival fibroblasts cultured on CP titanium and Ti-6Al-4V showed no significant differences(p>0.05) compared to Co-Cr-Mo alloy in 2 days, but significantly greater increase(p<0.05) in 5 and 9 days. 5. There were no significantly differences(p>0.05) between growth rates on gingival fibroblasts cultured on CP titanium, Ti-6Al-4V and tissue culture plate in 2 and 5days, but a significant lower growth rate(p<0.05) on CP titanium and Ti-6Al-4V versus tissue culture plate. 6. Some gingival fibroblasts cultured on all specimen groups failed to attach, but attached cells grew well, especially on CP titanium, Ti-GAl-4V and tissue culture plate. 7. There were no significant differences(P>0.05) between growth rates of both bone marrow cells and gingival fibroblasts cultured on CP titanium and Ti-6AI-4V. As a result of this study, both commercially pure titanium and Ti-6AI-4V showed excellent biocompatibility and there was no significant difference in the cellular response to the both metals. Bone marrow cells cultured on each substratum showed significantly greater growth rate and responded sensitively to cytotoxic effects of metal surfaces compared to gingival fibroblasts. Considering cell response to the substrate, it was likely that the composition itself of titanium metals have no significant effect on the biocompatibility. Further study need to be done to evaluate the influence of surface characteristics on cellular responses.

• 한국생활과학회지
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• 제22권2호
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• pp.315-328
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• 2013

The purpose of this study was to analyze on the aesthetic collaboration appeared on the modernism arts and Haute Couture designers in the 20th century as the necessity of analyzing on the pure meaning of collaboration which is a talking point associated with culture of the 21st century. The study was performed by means of documentary method. The results are as follows; First, it was analyzed that the collaboration in the pure meaning of the first half of the 20th century had partial common points which was stated as Art Inspiration in the arts collaboration out of the 21st century collaboration. Secondly, the Haute Couture designers(Paul Poiret, Gabriell Chanel, Madeleine Vionnet and Elsa Schiaparelli) have common point that they involved into the artworking through active exchange with many artists from diversified fields in the 20th century. Especially, the characteristics of the collaboration in the forms, materials and color of their works were appeared visually. When the collaboration in the first half of 20th century was regarded entirely as mental matter of manifestation of pure aesthetics, in can be said that the big difference was mostly the maximization of mutual interest between collaborator and collaboratee in the 21st century collaboration.

• Journal of Periodontal and Implant Science
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• 제29권3호
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• pp.607-621
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• 1999

This study examined the human fibroblasts cell attachment to commercially pure titanium surface which had been instrumented by 3 types of periodontal instruments. Commercially pure titanium plates were uniformly scaled using plastic, stainless steel, titanium curette. these all experimental groups 65 undirectional strokes with the designated curettes. Alteration of the surfaces due to instrumentation was evaluated by Form Talysurf(R) and reported as Ra value(mean surface roughness). Then other experimental groups were immersed in a cell suspension of human gingival fibroblasts($1{\times}10^5$ cell/ml). After 3 days of culture, cell attachment and morphology was observed by SEM, and attached cell were counted by Hemocytometer. A significant difference in mean Ra value was observed for surface instrumented by metal curette compared to either control surface or surface instrumented by the plastic curette(P<0.01). No stastically significant difference was noted between control surface and those instrumented by the plastic curette. SEM observation showed that cell morphology and attachment to the commercially pure titanium plate was similar appearance on the all experimental groups. Experimental groups instrumented by titanium curette and stainless steel curette were more attached cell number than control group, but experimental group instrumented by plastic curette were similar with control groups(P<0.01). In summary, metal curette produced an significant alteration of the commercially pure titanium surface and more favorable surface topography for cell attachment. Otherwise plastic curette was insignificantly altered the commercially pure titanium surface(P<0.01).

• Journal of Yeungnam Medical Science
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• 제15권2호
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• pp.286-296
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• 1998

비중격 만곡증 환자의 비내수술시 채취한 정상 하비갑개 점막조직으로 부터 상피세포만을 분리세포의 단층배양법(monolayer culture of dissociated cells)으로 배양하여 비점막 상피세포 배양법을 정립하고 또한 배양된 세포가 상피세포임을 동정하기 위하여 간접 면역형광항체법으로 상피세포 특유의 cytokeratin을 확인하였고 투과전자현미경으로 상피세포만이 가지고 있는 교소체(desmosome) 및 장세사(tonofilament) 등을 확인하였으며 6회까지 계대배양을 할 수 있었다. 향후 본 연구에서 배양된 비점막 상피세포를 이용하여 알레르기성 비염 등과 같은 비점막 염증성 질환의 병태생리에서 상피세포의 역할에 대한 연구와 호산구등 염증 세포의 침윤과 상피세포의 손상에 접착분자 및 cytokine의 상호작용에 관한 연구가 계속될 수 있을 것으로 기대한다.

• KSBB Journal
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• 제13권5호
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• pp.518-523
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• 1998

A large quantity of ethylene glycol(EG) is remained in the effluent after pretreating polyester weight-loss wastewater physicochemically in the fist stage and must be treated biologically in the second stage. Therefore, an excellent EG-utilizing bacteria strain was isolated from the natural system and the optimal culture conditions of the strain were investigated. The optimal culture conditions of temperature, pH, and nitrogen source were found to be 35$^{\circ}C$, 7.5 and ammonium chloride, respectively, when CODCr removal efficiency was more than 90%. The growth of stains and EG removal efficiency was slightly improved by adding elements such as niacin and biotin. With increasing inoculation size in a batch culture, the removal efficiency of EG was conspicuously increased. Growth rate was inhibited when the initial concentration of EG was more then 30g/L. The strain was identified as Pseudomonas sp. based on morphological and biological characteristics and named as Pseudomonas sp. EG1.

• 대한의생명과학회지
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• 제12권2호
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• pp.127-130
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• 2006

It is important to coordinated interaction among neurons, astrocytes and endothelial cells to maintain the function of brain. To study their regulatory mechanisms in vitro system, the co-culture system among the isolated cells from brain may be needed. However, the method for purifying brain microvascular endothelial cells (BMEC) far culture have not established yet. In this study, the proper culture methods of mice cells using two different strains, CD1 and C57BL6, to obtain the pure and plentiful endothelial cells were described. The flatted-round forms of CD1 endothelial cells grew on the collagen-IV coating plates, while the purified cells from C57 mice preferred type collagen-I dishes for their growth. Both cells displayed anti-PECAM-1 (CD31) and von Willebrand Factor immune-reactivity. These results indicated that different coating materials not only improve attachment of isolated cells but also promoting growth of cells, suggesting that this method of purifying murine Brain microvascular endothelial cells (BMEC) provides a suitable model to investigate blood-brain-barrier (BBB) properties within neurovascular unit in vitro.

• 예술경영연구
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• 제58호
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• pp.89-119
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• 2021

국민의 문화예술향유가 확대됨에 따라, 문화예술 관람에 영향을 미치는 요인에 대한 연구가 지속적으로 진행되고 있다. 그러나 대부분의 실증연구는 인구통계학적 및 환경적 요인에 치중하여 분석을 수행하였으며, 주로 순수문화예술 영역 내 장르를 구분하지 않고 수행된 경우가 많은 실정이다. 따라서 본 연구는 국민의 순수문화예술 향유 중 특히 미술전시회 관람에 영향을 미치는 요인을 실증적으로 분석하는 것을 주요 목적으로 한다. 이에 6개년의 「국민문화예술활동조사」 결과를 통해 수집된 총 56,588개의 표본을 활용하여 다중회귀분석 및 다원 분산분석을 수행하였다. 분석 결과 문화예술행사, 문화예술교육, 문화예술동호회에 참여한 경험이 있는 집단의 미술전시회 평균 관람횟수가 더 많은 것으로 나타났다. 또한 변수 간 상호작용효과를 확인하였다. 즉 문화예술행사, 문화예술교육, 문화예술동호회에 모두 참여한 경험이 있는 집단의 미술전시회 평균 관람횟수가 더 많은 것으로 나타났다. 본 연구는 다년간 수집된 빅데이터를 취합 및 분석하여 개인의 문화예술경험이 미술전시회 관람에 영향을 미치는 것을 실증적으로 확인했다는 점에서 의의가 있으며, 미술전시회 관련 중기 정책의 수립에 정책적 함의를 제공할 수 있을 것으로 기대된다.

• Applied Biological Chemistry
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• 제25권3호
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• pp.126-134
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• 1982

$^{14}C-2$, 6-Diethylaniline을 토양중에서 호기적으로 21 주간 배양시 발생된 $^{14}CO_2$는 살균하지 않은 A토양(clay loam)과 B토양(coarse sandy loam)에서 각각 6.5%와 10.1%이었다. Methanol로 토양을 추출시 A토양에서는 3.1%, B토양에서는 13.5%의 토양방사능이 추출되었다. 토양중에서의 분해산물은 2, 6-diethylacetanilide 이었으며 Chaetomium globosum은 순수배양시 분해산물로 2, 6-diethyl-p-benzoquinone을 생성하였고 이의 생성경로는 2, 6-DEA의 p-hydroxylation, quinoneimine의 형성 그리고 암모니아 발생을 수반하는 가수분해 등으로 제안하였다.