http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 홍선희(Sun Hee Hong) (검색결과 119 건)
- 무료
- 기관 내 무료
- 유료
-
Acrylic Resin에 혼합된 Polyphosphate가 미생물의 부착 및 성장에 미치는 영향
홍선희,최영철,Hong, Sun-Hee,Choi, Yeong-Chul 대한소아치과학회 2003 대한소아치과학회지 Vol.30 No.1
The purpose of this present study was to develop a new way of self-curing acrylic resin, using commercially available polyphosphate, Calgon, which is known to be antimicrobial and safe. For the study, polyphosphate(polyP) was blended with acrylic powder and devided into four groups as follows: no polyP(control), 1% polyP, 2% polyP, and 3% polyP. For the experiment, Streptococcus mutans GS5, Streptococcus sobrinus 6715, Streptococcus gordonii G9B and Challis, Porphyromonas gingivalis 2561, and Candida albicans ATCC 90027 were used. Resin specimens in each group were tested in vitro for the purpose of investigating the effect of polyP on the microbial attachment, growth and hydrophobicity of the resin surface. The results were as follows. 1. PolyP added to the acrylic resin decreased attachment of S. mutans GS5, S. sobrinus 6715, S. gordonii G9B. The greater binding inhibition was found in acrylic resin polymerized with polyP at higher concentrations. 2. The addition of polyP to acrylic resin failed to significantly affect the growth of the tested microorganisms. 3. The addition of polyP to acrylic resin seemed to reduce hydrophobicity of the acrylic resin. PolyP in acrylic resin does not seem to exert a direct antibacterial activity, but rather inhibit attachment of oral bacteria, especially mutans streptococci to saliva-coated acrylic resin. The acrylic resin reduces attachment of streptococci may be due to the decreased hydrophobicity caused by polyP added to the resin. PolyP may be included to acrylic resin to inhibit dental caries which often occurs when removable acrylic resin appliance is placed.
-
16S와 23S rRNA에 결합하는 probe를 이용한 겨울철 소양호 세균 군집 구조의 분석
홍선희,변명섭,안태석,Hong, Sun-Hee,Byeon, Myeong-Seop,Ahn, Tae-Seok 한국미생물학회 1997 미생물학회지 Vol.33 No.4
To scrutinize the bacterial community composition of Lake Soyang in winter, bacterial numbers belonging to Eubacteria, Proteobacteria and Cytophaga-Flavobacterium group were estimated by using 16S and 23S rRNA targeted oligonucleotide probes. Total bacterial numbers ranged from $0.7{\times}10^6$ to $1.1{\times}10^6cells{\cdot}ml^{-1}$, and vertical profile of total bacteria showed a peak at 5 m depth. The ratio of eubacteria to total bacteria were 34~90% and at 5 m and 10 m depths those were low exhibiting, 39 and 34%, respectively. The percentage of proteobacteria ${\alpha}$-group ranged 10.8~28.7%, ${\beta}$-group 4.5~53.5%, ${\gamma}$-group 4.9~35.5% and Cytophaga-Flavobacterium group 6.1~21.1%. The dominant groups were ${\beta}$-group at 0, 2 and 5 m, ${\gamma}$-group at 10 m, ${\alpha}$-group at 30 m and Cytophaga-Flavobacterium group at 50 m depth. In winter season, Lake Soyang can be divided into three layer, 0~2 m, 5~10 m and 30~50 m, by the bacteria community composition. By this method, new informations about aquatic ecosystem were developed.
-
Fluorescent In Situ Hybridization방법으로 분석한 소양호 세균 군집 구조의 계절적 변화
홍선희,안태석,Hong, Sun-Hee,Ahn, Tae-Seok 한국미생물학회 1998 미생물학회지 Vol.34 No.3
To define the structure and diversity of bacterial communities in the aqutic ecosystem, Lake Soyang, the largest artificial reservoir in Korea, a new method, fluorescent in situ hybridization was applied. This technique relies on the specific hybridization of the nucleic acid probes to the naturally amplified intracellular rRNA. By this method, the bacterial community composition of Lake Soyang and bacterial numbers belong to eubacteria, proteobacteria and Cytophaga-Flavobacterium group were estimated. Total bacterial numbers ranged from $0.3{\times}10^6{\sim}2.0{\times}10^6cells{\cdot}ml^{-1}$, and vertical profile of total bacteria showed the peak at 2 and 5 m depths. The ratio of eubacteria to total bacteria were 22~100% and varied with depth and season. The percentage of Proteobacteria ${\alpha}$-group ranged 2.6~66.7%, ${\beta}$-group 4.5~53.5%, ${\gamma}$-group 4.6~76.7% and Cytophaga-Flavobacterium group 2.1~35.9%. Also, bacteria] community had spatial and temporal characteristics. The dominant groups were ${\beta}$-group in winter, ${\gamma}$-group in spring and early summer and ${\alpha}$-group in summer.
-
홍선희(Sun Hee Hong),Pradeep Adhikari,이용호(Yong Ho Lee),이인용(In Yong Lee) 한국농약과학회 2022 한국농약과학회 학술발표대회 논문집 Vol.2022 No.4
기후 변화는 생태계의 다양한 변화를 야기한다. 이중 외래 침입 잡초의 변동성은 향후 농작업에 있어서 큰 혼란을 야기할 수 있다. 특히 현시점에도 농경지 우점잡초 중 절반 이상이 외래 침입 잡초이며, 기후변화로 야기된 잡초의 변동 중 외래잡초의 위해성이 높아질 수 있음을 많은 연구자들이 보고하고 있다. 이에 외래 침입 잡초의 미래 변동성을 예측하고 이에 대비하기 위해 본 연구에서는 종분포 모델링을 이용하여 주요한 외래 침입 잡초의 침입 위험을 평가하고, 침입 종의 제어 및 관리를 위한 우선 순위를 지정하는데 활용하였다. 특히 본 연구에서는 침입 종의 위협이 인정된 생태계교란식물 및 향 후 전국적인 문제가 일어날 수 있을 것으로 판단되는 남방계 침입 외래 잡초에 대한 평가를 MaxEnt 모델을 활용하여 평가하였다. RCP 4.5 및 8.5 시나리오를 적용했을 때 모두 현재보다 높은 수준의 남방계 외래 침입 잡초의 서식처가 늘어났으며, 생태계교란식물의 경우에도 국토 절반 가량이 매우 높은 위해도를 가질 것으로 예측 되었다. 본 연구는 기후 변화가 남쪽 지역에서 침입하는 잡초의 기후 장벽을 이동시켜 북쪽으로의 잡초 침입 위협을 악화시킬 것이라는 주장에 강력한 근거가 되며, 새로운 지역으로의 추가 침입을 방지하기 위해 적극적 이동경로의 통제, 예방적 관리가 필요하며, 이를 실행하기에 앞서 우선순위의 도출에 과학적 근거를 제공할 수 있음을 확인하였다.
-
홍선희(Sun Hee Hong),이용호(Yong Ho Lee),나채선(Chae Sun Na),김대연(Dae Yeon Kim),김정규(Jeong Gyu Kim),강병화(Byeung Hoa Kang),심상인(Sang In Shim) 韓國雜草學會 2010 Weed&Turfgrass Science Vol.30 No.1
폐광산 주변의 토양 중금속 오염과 이 지역의 식생조사를 실시한 결과 As의 오염이 가장 심각하게 나타났다. 조사된 광산에서 모두 나타난 초종은 달맞이꽃, 닭의장풀, 며느리밑씻게, 개망초, 망초 등 5개 초종이며, 이들은 식생천이의 초기종으로, 중요치(important value)는 달맞이꽃이 가장 높았다. 달성광산은 종풍부도 및 종다양성이 가장 높았으며, 오염의 정도와는 별개로 작토층이 잘 발달한 것으로 밝혀졌다. 조사 지점 사이의 리차가 큼에도 불구하고 군집유사도는 비교적 높은 것으로 밝혀졌으며 이는 교란에 의한 천이 초기종들의 우점이 강하기 때문으로 생각된다. Field study to find appropriate species for phytoremediation and phytomonitoring with higher plants was carried out at four abandoned metalliferous mines. In order to know the tolerant degree of plant resources collected at heavy metal polluted sites, soil and plants were sampled at same sites and metal concentrations were determined. Most serious heavy metal polluted in the sites was As that showed range from 29.1 to 1372.2 mg kg-1 in investigated area. The dominant species were Oenothera biennis, Commelina communis, Persicaria senticosa, Conyza annuus, Artemisia princeps, and Erigeron canadensis. These species were predominant species that were proliferated in any survey area. Compared with other sites, vegetational characteristics of Dal-Seong, a mine site abandoned early in 1973, showed higher diversity index and lower dominance index. Distributions of weed species according to life cycle indicated that the proportions of perennial plants were lowered in every investigated site. Although the polluted areas were distant from each other, similarity indices among these vegetation were relatively similar. These results means the vegetations of abandoned mine areas were beginning stage of vegetational succession, and the vegetations were adversely affected by disturbance with heavy-metals and lack of water in soil.
-
-
-
VA/E/MMA 터폴리머 분말수지와 아질산형 하이드로칼루마이트를 병용한 저수축 단면복구재의 성능평가
홍선희(Hong Sun-Hee),김완기(Kim Wan-Ki) 대한건축학회 2011 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.31 No.2(구조계)
In this study, performance of patching repair materials using a VA/E/MMA terpolymer powder with nitrite-type hydrocalumite(calumite) is evaluated. The patching repair materials using calumite are prepared with shrinkage-reducing agent contents(SRA/C) of 0, 2, 4, 6% and VA/E/MMA terpolymer powder, VAE copolymer powder for performance comparison. And they are tested for physical properties and durabilities. As a result, the physical and durable performance of the patching repair materials decrease with increasing SRA/C. However, drying shrinkage is improved by increasing SRA/C. Finally, all the performance of the patching repair materials meet the quality requirement, and VA/E/MMA terpolymer powder is superior to VAE copolymer powder in the performance.
-
-
RISS
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
