Proteome Analysis of Nodule Development in both Sinpaldalkong2 and SS2-2

Lim,Chae-Woo,Park,Ji-Young,Hwang,Cheol-Ho 한국작물학회 2003 한국작물학회 학술발표대회 논문집 Vol.2003 No.-

2,4-D 處理가 'Harcot' 살구와 '美白' 복숭아의 果實 成熟과 品質에 미치는 影響

윤철구,김영호,임상철,김학현,이철희,최관순,김선규 충북대학교 농업과학기술연구소 1999 農業科學硏究 Vol.16 No.-

Effect of 2,4- D application on the fruit maturity and quality of 'Harcot' apricot and 'Mibaek' peach was examined. Leaf area of 'Harcot' apricot was not affected by 2,4-D while that of 'Mibaek' peach was increased by 35mg · L-1 2,4-D. Application of 2,4-D at 35mgㆍL-1 increased the fruit weight of both species, and that of 'Harcot' was doubled. Soluble solids content of 'Harcot' was decreased by 2,4-D while that of 'Mibaek' was not affected. Fruit maturity of 'Harcot' and 'Mibaek' was enhanced for respective 4 and 1 day by 2,4-D application. Percent fruit cracking of 'Harcot' apricot was decreased by 35mg · L-1 2,4-D.

지베렐린과 에세폰의 葉面撒布가 '美白' 복숭아의 熟期와 品質에 미치는 影響

김영호,윤철구,임상철,김학현,이철희,최관순,김선규 충북대학교 농업과학기술연구소 1999 農業科學硏究 Vol.16 No.-

In order to obtain the basic data for artificial maturity control of 'Mibaek' peach, GA and ethephon were foliar sprayed 4 weeks prior to harvest, and their effects on fruit maturity and quality were examined. GA and ethephon tended to decrease the fruit weight except 100mg ㆍ L-1 GA+50 to 100mg · L-1 ethephon treatment. GA increased the fruit firmness, and ethephon at higher concentration increased the fruit drop. Harvest date was advanced for 7 to 8 days by ethephon while was delayed for 6 to 8 days by GA treatment, regardless of concentration.

치과용 콤포짓트 레진의 적정중합을 위한 최소 광조사 시간 평가

임범순,이용근,김철위,최기열,이중배 大韓齒科器材學會 2004 대한치과재료학회지 Vol.31 No.1

The aim of this study was to estimate the minimum irradiation time for dental composites using a dynamic mechanical analyzer (DMA) and FT-IR. Six commercially available dental composites with A3 shade were tested: Heliomolar RO (Vivadent, Liechtenstein), Charisma (Kulzer, Germany), Herculite XRV Enamel (Kerr, USA), Aelitefil (Bisco, USA), Z100 (3M, USA), and Z250 (3M, USA). Storage modulus was measured by using DMA (StressTech Rheometer, Rheologica Instrument, Sweden) with fast oscillation mode (1 Hz). After disk-type (4 ㎜ ?1 ㎜) samples were irradiated with 500 mW/cm2 for 1, 2, 3, 4, 5, 10, 15, 20, and 30 s, storage modulus was recorded continuously for 60 min. Degree of conversion was also measured using FT-IR spectroscopy (FTS-165, Biorad Win-IR, Perkin-Elmer, USA) at 60 min after irradiation with same curing condition as DMA test. Sample irradiated with 500 mW/cm2 for 120 s was used as a control. The average of results for five specimens was compared using Tukey multiple comparison test (p=0.05) and the minimum irradiation time of composites was determined. The minimum irradiation time to get adequate polymerization was different depending on the dental composites. Both Z100 and Z250 require short irradiation times (5 s) and Charisma requires long irradiation time (15 s).

근관와동 가봉재의 변연누출에 관한 실험적 연구

임성삼,노철진 大韓齒科保存學會 1987 Restorative Dentistry & Endodontics Vol.12 No.2

ABSTRACTThe purpose of this study was to evaluate the sealing properties of endodontic cavity filling materials according to the time intervals after filling. Access cavities were prepared in extracted human premolar or molar teeth and filled with caviton, zinc oxide eugenol cement, zinc oxide eugenol cement with a base of gutta percha stopping and gutta percha stopping. After filling at the intervals of immediate, 2 days and 2 weeks the teeth were immersed'for 2 weeks in 1% methylene blue solutions. Longitudinal sections were obtained from approximately center of teeth and the depth of dye penetration into the access cavities were observed by 1 Ox macrolens.The following results were obtained. 1. All the materials experimented showed varying depth of dye penetration. 2. Of the material tested, caviton showed the best marginal sealing qualities regardless of the time intervals after filling and the sealing properties of the gutta percha stopping was the worst. 3. Both in zinc oxide eugenol cement and zinc oxide eugenol cement with a base of gutta percha stopping, the fillings allowed to mature for 2 days in normal saline solution showed the best sealing properties and those with no maturing time revealed the worst sealing qualities. 4. The sealing qualities of zinc oxide eugenol cement with a base of gutta percha stopping reveal- ed slightly lower depth of dye penetration than that of zinc oxide eugenol cements.

티타늄 표면처리에 따른 조골세포의 반응

임영준,이용근,임범순,김철위 大韓齒科器材學會 2004 대한치과재료학회지 Vol.31 No.1

It is well known that surface modification of titanium for implant has been shown to improve the adhesion, migration and differentiation of adjacent cells and tissues. This study presented the results of an experimental study on the interaction between MC3T3-E1 (mouse calvarian osteoblast cell line) cells and cp-titanium treated by thermal oxidation at four different temperatures after TiO2 blasting and NaOH treatment, which could provide the benefits of surface roughening and favorable oxide layer formation. No heat treatment group was used as a control. Cell interactions were studied using the combination of phase contrast microscope and scanning electron microscope. Potential cytotoxicity was tested by MTT assay. The response of osteoblast cells was different according to the condition of surface modifications. Thermal oxidation at 600℃ showed the best early cell attachment and calcium nodule formation compared to other groups. Thermal oxidation at 800℃ showed the worst cell attachment and proliferation. In general, osteoblast cells were attached to accompanying the formation of cellular process, spreaded and differentiated on the specimen surfaces. Calcium nodules were formed on the surface after these cells were developed multiple cell layers. These early osetoblast/titanium interactions might play a critical role in the osteoinduction stage of osseointegration. There was no statistically significant difference in cytotoxicity among the heat treated surfaces from the MTT assay(p>0.05). The results of microstructure analysis of the characterized cp-titanium surface of this study will be published separately.

치과용 아말감과 상아질의 결합강도에 관한 연구

임범순,김철위,김명국,백기석 대한치과기재학회 1996 대한치과재료학회지 Vol.23 No.1

The purpose of this study was to evaluate the shear bond strength of amalgam to dentin treated with the various bonding agents and to examine the failure mode after bond test. Four kinds of dental amalgam and six kinds of dentin bonding agents were used in this study. Copalite varnish was used for control group. The extracted human molars were mounted in a self-cured acrylic resin and the nonocclusal surface of the crown was exposed by grinding. A well-fitted wax mold was placed on the dentin surface and dentin adhesives were applied according to the manufacturer's instructions before condensing the amalgam. After condensation of the amalgam, specimens were stored at 37℃ and 100% relative humidity for 24 hours to complete hardening process. Specimens were aged in a deionized water at 37℃ for 24 hours, then tested in shear on a Instron universal testing machine at a cross-head speed of 0.2mm-min. From the experiment, the following results were obtained: 1. The bonding agents which included NTG-GMA, showed a low shear bond strength. It was observed that the fracture modes between bonding agents and amalgam were adhesive failure. 2. The bonding agents which included 4-META, showed a high shear bond strength. Some fracture modes between bonding agents and amalgam showed cohesive failure, although many fracture modes showed adhesive failure. 3. For the bonding agents which included a phosphate ester system, the shear bond strength showed large scattering depending on bonding agent. When specimens showed a high shear bond strength, the mixed (adhesive/cohesive) failure mode between bonding agents and amalgam were observed. 4. BDX produced a low shear bond strength. It was observed that the control group(CPL) was' not effective for amalgam bonding agent.

광중합 코팅제에 따른 수복용 글라스 아이오노머 시멘트의 경도 변화

임범순,김철위 서울대학교 치과대학 치과생체재료학교실 1994 치과생체재료학 논문집 Vol.2 No.1

This study was done to compare the effect of various surface coating on harness for three different glass ionomer cements. The glass ionomer cements used were self-curing, light-curing and water hardening glass ionomer cement. The experimental groups were coated with Fuji Coat LC, Ketac-Glaze, Fortify, Schotchbond 2 and Fuji Vanish while the control group was uncoated. The half of the experimental groups were stored in 37℃ air, and the others wee placed in lactic acid solution. The surface harness for each specimen was then measured after 15 minutes, 1 hour, 1 day, 7 days and 30 days using a Vickers microhardness tester. From the experiment, the following results wer obtained ; 1. In general for the glass ionomer cements without protective surface coating, stroing in air showed the large hardness number and produced dehydration, which caused increase in hardness with time. After immediately mixing (15 min.) of cements, the glass ionomer cements without surface coating ranked in order of high value of surface hardness were water-hardening, glass ionomer cement, light-curing glass ionomer cement and self-curing glass ionomer cement. 2. The hardness of the glass ionomer cement with aged in lactic acid soultion was smaller than that in air. The surface damage resulting from dissolution in lactic acid caused a commensurate decrease in harness with time. 3. The combination of the self-cured glass ionomer cements and GL or FCS coating material appeared to be more effective than others in providing an enhanced hardness. The light-cured glass ionomer cement showed a relatively high in surface harness when the surface coating materials KGL, FCS and SLA were applied. The FCS coating material leaded to a significant improvement in the surface hardness for the water-hardened glass ionomer cement.

요통에 對한 자석요대(마그네밴드)의 治療效果

林準圭,李哲浣 大田大學校 1984 論文集 Vol.3 No.1

치과용 콤포짓트 레진의 중합수축 응력

임범순,이용근,김철위 대한치과기재학회 2001 대한치과재료학회지 Vol.28 No.2