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소목(Caesalpinia sappan) 추출물의 Streptococcus mutans에 대한 성장, 산생성, 부착 및 비수용성 글루칸 합성 억제에 미치는 영향
유용욱,유현희,김윤정,유미선,서세정,이황,이흥수 대한구강보건학회 2003 大韓口腔保健學會誌 Vol.27 No.2
Streptococcus mutans is known as the causative bacterial playing the most important role in forming plaque and it is being noticed as major causative bacteria of dental caries. Therefore, development of more effective, substantial and safe preventive agent against dental caries and periodontal disease is honestly required. The present study was designed to investigate the effect of chloroform extract(CE), n-butanol extract(BE),methanol extract(ME) and water extract(WE) of Caesalpinia on the growth, acid production, adhesion, and insoluble glucan synthesis of Streptococcus mutans. The CE, BE, ME and WE decreased the growth and acid production of S.mutans than that of control, especially, the ME was more effective than other extracts. The effect of CE, BE, ME and WE on the adherences to saliva-coated hydroxyapatite bead(S-HA) were evaluated. At the concentration of 2,000 ㎍/㎖, the CE showed 32% rate of bacterial adherence to S-HA, whereas, other extracts of the same concentration producedgreater than 50% rate. The CE and BE were significantly decreased the reduction rates of water insoluble glucan formation from sucrose by crude glucosyltransferase of S.mutans. Thus, the application of C. sappan can be considered a useful and a practical method for the prevention of dental caries.
김주현,최유희 우리말글학회 2001 우리말 글 Vol.22 No.-
This paper is about establishment of authentic text and annotation on Lee Sang's literature. Frist, we pointed out the fallacies of the first printing of Lee Sang's Japanese Poems and scrutinized the fallacies of translation and compiling process of collection in many aspects. The fallacies of translation were grouped 10category such as opposite translation, absurd translation, colloquial expression, chinese writing style expression and so on. Some of the results have already been pointed out but many of them are new We believe that this paper ascertained more authentic text version but the establishment of authentic text has not been finished. Still, we can not identify initial name 'R' presented in the prefaces of 〈ChoSeon and Architecture(朝鮮と建築)〉. We reserve this part of work unfinished for another time and another researcher. Secondly, this paper also focused on 〈Raven's eye view(烏瞰圖)〉 which is the most annotated poem of Lee Sang. After we studied former researcher's opinions about the title 〈Raven's eye view〉, We bring up the possibility that the title 〈bird's eye view(烏瞰圖)〉is more original one than 〈Raven's eye view〉. In addition to that, we studied annotation of 〈poem number 1〉the most discussed poem of Lee Sang's and studied 〈poem number 1(詩第1號)〉. Annotation work about poems of Lee Sang first developed by Lee Ur-rhyueng and studied more seriously by Lee Seoung-hun. Based on their studies. This paper presented more particular and detailed annotation work after fully surveying almost all papers, criticisms, and books, which are related to Lee Sang. Specifically we supplemented annotation that Lee Seoung-hun omitted annotation amongst papers published by 1989 and added new research results. We still feel something wanting that we can not bring up everything. It is because of the shortage of research period and different style of this paper from general paper. The remainder of works are annotation of full 〈Raven's eye view〉and the whole works of Lee' Sang. Then, we can avoid duplicated study and will present new results based of authentic text version. If this is completed, we can enhance the level of study about Lee Sang.
정수영,유현희,김금숙,신미경 원광대학교 생활자원개발연구소 2005 생활자원개발연구 Vol.7 No.-
The purpose of this study is to find out the optimal mixing ratios of amounts of Mal-Cha for preparation of Jeung-Pyun through Sensory, Mechanical characteristics test. The proximate composition of Mal-Cha were a 5.46±0.15% of moisture, 4.43±0.11% of total nitrogen, 7.52±0.21% of crude lipid, 8.74% of crude fiber, 8.51±0.09% of ash. Overall quality in 1.5% Jeung-Pyun showed the worst of 0, 0.5, 1.0% Jeung-Pyuns(p<0.05), especially 1.0% Jeung-Pyun had relatively the best overall quality. But the sweetness, sourness, flavor, hardness, moistness were not significantly different among all Jeung- Pyuns. 0, 0.5, 1.0% Jeung-Pyuns showed the best quality of Jeung-Pyun through sensory, mechanical property. Total color difference was increased as amount of Mal-Cha(p<0.001).
Berberine의 항생제 내성 확색포도구균에 대한 항미생물 효과
김강주,차정단,김해경,유현희,유용욱,이동근 대한악안면성형재건외과학회 2002 Maxillofacial Plastic Reconstructive Surgery Vol.24 No.2
Antibiotic-resistant Staphylococcus aureus (S. aureus) emerged in many parts of the world and increased complex clinical problems. Therefore, new agents are needed to treat the antibiotic-resistant S. aureus. Some natural products are candidates of new antibiotic substances. Previous reports showed that the extract of Coptidis Rhizoma and Phellodendri Cortex have antimicrobial effects. The main antibacterial substance of Coptidis Rhizoma and Phellodendri Cortex is berberine. In this study, we examined the antimicrobial activity of berberine to antibiotic-resistant S. aureus. We isolated the 13 strains of antibiotic-resistant S. aureus from the oral cavity of healthy children in a preschool, and investigated the antimicrobial activity of berberine. We examined the effects of berberine on the level of resistance to antibiotic-resistant S. aureus. We observed that the invasion of S. aureus into human gingival fibroblasts was blocked by berberine. Berberine inhibited the growth of antibiotic-resistant S. aureus as a dosw dependent maner. Minimum inhibitory concentration (MIC) of berberine against antibiotic-resistant S. aureus was 50∼100㎍/㎖. The inhibition of S. aureus invasion was depended on the concentration of berberine in human gingival fibroblasts. The MIC of ampicillin against antibiotic-resistant S. aureus was 32㎍/㎖. However, the MIC of ampicillin against antibiotic-resistant S. aureus in the presence of 50㎍/㎖ berberine was 1㎍/㎖. These data indicate that the combination with berberine and β-lactam antibiotics resulted in the synergistic reaction. These results suggest that the berberine may have the antimicrobial activities to antibiotic-resistnat S. aureus, and the mechanism may be the inhibition of growth and intracellular invasion, and alteration of antibiotic-resistance level of antibiotic-resistant S. aureus.
Jun Hyeon Cho,Jong Hee Lee,Ji Yun Lee,Young Bo Son,Soo Kwon Park,Sang Yeol Kim,Choon Woo Lee,Un Sang Yeo,Dong Soo Park,You Cheon Song,Min Hee Nam 한국육종학회 2012 한국육종학회 심포지엄 Vol.2012 No.07
Geneally, rice seeds regardless indica or japonica are showing low germination ratio or completely lost germination ability together with lost of good eating quality under high temperature and humidity conditions. Thus, this study was designed to evaluate a longevity for conservation of good eating quality during long term storage in rice. For the longevity evaluation, germination ability was studied after 5 days of high temperature and humidity stress (50℃/RH 95%). Dharial, originated from Bangladesh and showing weedy type with red pericarp, was selected as a good donor for longevity genes. A mutant was developed from Dharial through EMS mutagenesis and two populations of Dharial/4*Ilmibyeo and Dharial/4*Gopumbyeo were also developed for genetic study. In the 2-DE analysis followed by MALDI-TOF MS with wild and mutant lines, several candidate genes were identified. In the longevity test of two populations, a few lines showing good germination ability after high temperature and humidity stress were selected and subjected to confirm the relationships between longevity and conservation of good eating quality under long term storage.
You, Jang Youl,Nam, Byung Hee,Park, Hyeon Ku,You, Ki Pyo Trans Tech Publications, Ltd. 2018 Applied mechanics and materials Vol.878 No.-
<P>As 70% of the terrain of Korea consists of mountains, it is required to incorporate embankments, bridges and tunnels, etc. into road construction plans. The change in wind flow caused by the construction of embankment, in particular, has led to the increase of wind flow damage. In this study, a research was conducted on the method to facilitate wind flow, changed by the road embankment using culvert. There were a total of 52 points, of which 26 points were in front of the road embankment and 26 points in the back of the road embankment. When the number of two culverts were the same, the wind speed around the culvert was greater by more than 5% ~ 40% in the culvert size 6.0m x 4.5m than in the culver size 3.0m x 2.5m. The findings of the experiment indicates that the reduced wind speed of the wind flow entering and passing through the inlet of culvert can mitigate the congestion of wind flow that would otherwise be caused by the installation of the culvert.</P>
Hee Chang Kang,HAEJINJEONG,Jin Hee Ok,Ji Hyun You,Se Hyeon Jang,이승연,Kyung Ha Lee,박재연,Jung-Rae Rho* 한국조류학회I 2019 ALGAE Vol.34 No.2
The phototrophic dinoflagellate Biecheleriopsis adriatica is a small suessioid species characterized by a fragile thinwall. Although the morphology of this dinoflagellate is well established, there is currently little information availableon its distribution and the environmental factors that influence this distribution. Thus, to investigate the spatial andseasonal distributions of the vegetative cells of B. adriatica in Korean waters, surface water samples were collected on aseasonal basis from 28 stations in the East, West, and South Sea of Korea and Jeju Island from April 2015 to October 2018,and abundances of the vegetative cells of B. adriatica were quantified using quantitative real-time polymerase chainreactions, for which we developed the species-specific primer and probe set. Simultaneously, major environmentalparameters, including temperature, salinity, nutrient concentrations, and dissolved oxygen concentrations were measured. The vegetative cells of B. adriatica were detected at 20 of the 28 sampling stations: 19 stations in summer and 6 inautumn, although from no stations in either spring or winter. The ranges of water temperature and salinity at sites wherethis species was detected were 17.7-26.4°C and 9.9-34.3, respectively, whereas those of nitrate and phosphate concentrationswere not detectable-96.2 and 0.18-2.66 μM, respectively. Thus, the sites at which this species is found are characterizedby a narrow range of temperature, but wide ranges of salinity and concentrations of nitrate and phosphate. Thehighest abundance of the vegetative cells of B. adriatica was 41.7 cells mL-1, which was recorded in Jinhae Bay in July2018. In Jinhae Bay, the abundance of vegetative cells was significantly positively correlated with the concentration ofnitrate, but was negatively correlated with salinity. On the basis of these findings, it appears that the abundance of B. adriatica vegetative cells shows strong seasonality, and in Jinhae Bay, could be affected by the concentrations of nitrate.