생활치 미백제가 우치 법랑질의 투명도에 미치는 영향

김동준,김영주,김학근,박은종,서은주,황윤찬,오원만,황인남 大韓齒科保存學會 2005 Restorative Dentistry & Endodontics Vol.30 No.3

본 연구에서는 현재 임상에서 home bleaching을 위해 사용되고 있는 표백 재료들이 치아 법랑질의 투명도에 어떠한 변화를 일으키는지 고찰해 보고자 시행하였다. 실험 대상으로는 하루 전 발거한 우치 (bovine tooth)를 사용하였다. 치아의 순면에 수직되게 다이아몬드 드릴을 이용해 수주 하에서 직경 6 mm의 원통형 치아 시편을 만들어 순면이 노출된 상태로 투명한 아크릭 레진에 포매한 후, low speed diamond saw (Isomat, Buehler Co., USA)를 사용하여 1.2 mm 두께로 절단하였다. 절단된 시편은 순면을 먼저 편평하게 연마하고,절단된 면을 연마하여 두께 1 mm의 시편을 완성하였다. 완성된 시편(우치 25개)을 무작위로 추출하여 3개의 그룹으로 나누고 나머지는 대조군으로 하였다. Opalescence (10% carbamide peroxide, Ultradent, Milford, USA), Rembrandt (10% carbamide peroxide, DenMat, USA) 및 Opalescence F(15% carbamide peroxide with fluoride, Ultradent)를 시편의 순면에 1주일 동안 적용 (표백제는 24시간마다 교체)하였고, 설측면은 증류수를 적신 거즈에 접촉된 상태로 보관하였다 표백제를 적용하기 전과 적용 3, 5, 7일째에 시편의 삼자극치 X, Y, Z 값을 색채색차계 (Color & Color Differencemeter, Model TC-6FX, Tokyo Denshoku Co., Japan)로 백색 배경판과 흑색 배경판 상에서 측정하였다 백색 배경판과 흑색 배경판 상에서 측정된 Y값의 평균값을 이용해 contrast ratio를 계산하였다 얻어진 값을 One Way Repeated Measured ANOVA를 이용하여 통계 처리한 결과 10% Opalescence처치군, 15% Opalescence-F처치군 및 대조군에서는 통계적으로 유의할만한 증감을 보이지 않았고, Rembrandt처치군에서는 Contrast ratio가 증가하였다 (p < 0.01) . This study was done to evaluate whether vital bleaching agents could influence on the translucency of the bovine enamel. The anterior bovine teeth that were extracted one day before and without any gross discoloration were obtained and then were preserved in physiologic saline. 6 mm cylindrical tooth specimens were fabricated with diamond puncher perpendicularly on labial surface of bovine tooth. After embedded in transparent acrylic resin with labial surface being exposed, they were cut to a thickness of 1.2 mm with low speed diamond saw (Isomat, Buehler Co., Lake Bluff, IL, USA). They were smoothly ground to 1 mm thickness of enamel with sandpaper. 24 specimens were randomly divided into 3 groups and control group respectively. Opalescence (10% carbamide peroxide, Ultradent, South Jordan, USA), Rembrandt (10% carbamide peroxide, DenMat, USA) and Opalescence F (15% carbamide peroxide with fluoride, Ultradent, USA) were applied on labial sides of the bovine enamel for 7 days (bleaching agents were reapplied every 24 hours) and the opposite surface was contacted to cotton that soaked in distilled water. The control group was soaked in distilled water. Three stimulus value X, Y and Z were evaluated with colorimeter (Color ' Color Differencerneter, Model TC-6FX, Tokyo Denshoku Co., Japan) on the labial surface of all specimen three times on white and black background plate before the bleaching agents were applied and on 3rd, 5th and 7th day after applied. The degree of translucency was normally assessed by measuring the inverse property, opacity (contrast ratio). 10% Opalescence, 15% Opalescence-F, and control group showed no significant variation in the translucency of bovine enamel, However Rembrandt decreased the translucency of it (p < 0.01).

제 3형 Gaucher세병으로 인한 진행성 근간대성 간질 2예

허경,예종수,김상진,김성은,김응규,조효근,김찬환,김현주 대한신경과학회 1999 대한신경과학회지 Vol.17 No.3

충북 지역 초등학교 과학교육의 실태 조사

김찬종,이선경,김수환,고은성 淸州敎育大學校 科學敎育硏究所 科學과 數學敎育論文集 Vol.23 No.-

A survey was carried out comprehensively to investigate the present status of science education in primary schools 496 teachers in 199 primary schools in Chungbuk area participate in the survey. They questionnaire used in this study included items regarding goals or objectives for science education, approaches for instruction, teaching-learning strategies, assessment for instruction, teaching-learning strategies, assessment for instruction, computer use in science classes students' activity and the status of experimental equipment or tools for science education. Items on science textbooks and the understanding of the 7th national curriculum were also included in it. The results based on the teachers' responses were summarized and provided in this paper and it showed practices of science education in Chungbuk area.

컴퓨터 작업 시 의자 등받이 위치가 근육 활성도에 미치는 영향

김민우,변승진,이경은,정소영,조주영,최원자,최찬양,김경 대구대학교 특수교육재활과학연구소 2011 再活科學硏究 Vol.29 No.1

이 연구는 컴퓨터 작업시 의자 등받이 위치가 근육활성도에 미치는 영향을 알아보기 위해 36명의 근골격에 문제가 없는 성인 남녀가 참가하였으며 대상자들은 등받이가 뒤에 있는 의자와 등받이가 없는 의자, 등받이가 앞에 있는 우리들 의자를 무작위로 배정하고 동일한 컴퓨터 작업을 실시하게 하였다. 실험 중, 표면근전도기를 사용하여 의자에 따른 위등세모근, 머리널판근 그리고 척주세움근의 근활성도 변화를 측정하였다. 이 연구의 결과를 종합해보면 등받이가 앞에 있는 의자는 허리 근육의 부담을 줄이지만 목근육에 부담이 늘어나고 등받이가 뒤에 있는 의자와 없는 의자는 허리근육에는 다소 무리가 가지만 목근육에는 부담이 덜하다는 것을 알 수 있었다. 이러한 결과로 환자의 증상에 다라 컴퓨터 작업을 하는 동안 의자 등받이의 위치를 조절하여 치료에 도움이 될 수 있다고 생각되어진다. Objective : In this study, we checked and observed people's change of body muscle and muscle activity who do computer work on different chairs. We set three kind of chairs which one is a stool and another one is the back is fixed, and the other one is the back is fixed in front of chair. Subject : Accounting for 36 health men and women, we divided these people to 3 groups and put them on the three cases(position 1, position 2, position 3). We measured muscle activity of upper trapezius, Splenius Cervics, Erector Spinae from the groups by using surface electromyogram system. Methods : The standard of the electromyogram was 'reference voluntary contraction', and we carried out 'one way anova' to compare muscle activity of three groups. Results : In position 1, reference voluntary contraction of upper trapezius muscle activity was 123.2821%, Splenius Cervics was 141.7526%, and Erector Spinae was 254.5233%. In position 2, reference voluntary contraction of upper trapezius muscle activity was 132.9395%, Splenius Cervics was 141.7526%, and Erector Spinae was 246.6540%. In position 3, reference voluntary contraction of upper trapezius muscle activity was 190.6487%, Splenius Cervics was 270.2332%, and Erector Spinae was 182.1021%. Both upper trapezius and Splenius Cervics muscle activity of position 3 group was higher than the others groups. In position 1 group, Erector Spinae muscle activity was hight than the other groups. And either was position 2 group's(p<0.05). Conclusion : Therefore the chair which is the back is fixed in front is more comfortable for waist muscle but it's not good for neck. And the other chairs are better in waist muscle but not in neck muscle. So far, when we do a computer work, it's prefer to sit on the group 1&2's chairs to reduce neck muscle's stress and sit on group 3's chair to reduce waist muscle's stress.

냉간 압연가공에서 작업롤과 강판의 표면조도에 관한 연구

김순경,전언찬 韓國工作機械學會 2000 한국생산제조학회지 Vol.9 No.4

황토와 생석회의 혼합비율에 따른 축산폐수 처리에 관한 연구

김보국,신은섭,원찬희 全北大學校 附設 都市및環境硏究所 1999 都市 및 環境硏究 Vol.14 No.1

This study was conducted in order to investigate removal efficiency of turbidity, organic matter, nitrogen and phosphorus to reduce environmental pollution of treatment livestock wastewater with mixed proportion of loess and lime. The result of study, the removal of turbidity, COD_Cr and T-P increased along the dosage, and was to be fixed above the appropriate dosage. In the removal turbidity, the appropriate mixed proportion of loess and lime was Loess:Lime = 3:7, the appropriate dosage was 30g. In the removal COD_Cr, T-P and TKN was Loess:Lime = 3:7, 30g, Loess:Lime = 5:5, 20g, Loess:Lime = 5:5, 40g, respectively.

자궁암세포(HeLa)에 대한 사군자탕과 수종 항암제의 병용투여 효과

은재순,김현욱,소준노,오찬호,이송재 又石大學校 1993 論文集 Vol.15 No.-

The studies were conducted to investigate the combined effects of Sa Kunja Tang(SKT) and several anti-cancer drugs. The effects of SKT and several anti-cancer drugs on the proliferation of HeLa cells, human cervical cell line, was estimated by MTT colorimetric assays. The SKT extract inhibited the proliferation of HeLa cell at 10^-4g/ml. The inhibitory action of the mitomycin C(MMC), mercaptopurine(MCP) and 5-fluorouracil(5-Fu) treated group, respectively, on the proliferation of HeLa cell was increased by the SKT. When the mice were treated by the MMC, the number of leukocyte was decreased significantly at the 1st and 3rd day, but recovered at the 7th day. In the groups of the MMC treated with the SKT, the number of leukocytes was increased significantly than the group of the MMC treated only at the 3rd day. The SKT extract decreased the thymus weight of mice. The SKT extract increased the number of plaque forming cells(PFC), but the MMC treated group decreased the number of PFC. The combined treatment of MMC and the SKT increased the number of PFC significantly than the MMC treated group. The SKT extract increased the proliferation of T cells, but the MMC treated group decreased the proliferation of T cells. The combined treatment of MMC and the SKT increased T cell proliferation significantly than the MMC treated group. In conclusion, the results presented in this paper suggest that the SKT extract can decrease the dose of anti-cancer drugs on HeLa cell, and recover the side dffects of the MMC, such as leukopenia and immunosuppresion, without any intercalating the anti-proliferative action of the MMC in vivo.

국제 경기를 통한 스포츠 산업의 활성화 방안

김인형,최동일,남희은,이근모,김찬룡 釜山大學校 附設 體育科學硏究所 1998 體育科學硏究所 論文集 Vol.14 No.-

This study was mainly focused on the relationship between sports industry and international games. According to the category of both sports information ·service industry and sports technology industry. The way of activating sports industry by international games is proposed as follows; 1. Sports information · service industry 1) Sports Event (1) Expending the inducement of sports event sponsored by domestic international enterprises. (2) Improving image of enterprise by activating character industry. (3) Elevating the mood of international games by pre-event and post-event. (4) Attracting tourist during games session by opening various cultural and artistic events. 2. Media (1) Establishment of Media facilities such as international broadcasting center or media center. (2) Providing best media services by digitalizing every kind of broadcasts. (3) Using aggressive internet advertisement of game's information, cultural events, tourism, and etc. 3. Sports Event Tourism (1) Providing sports event package tourism. (2) Rehabilitating accomodation and convenience facility at the level of advanced country. (3) Building sports theme complex well international sports heros are taken as theme. (4) Building sports mall well every sports-related businesses can be a solved as one-stop service. 2. Sports technology industry 1) Sports Facility (1) Founding the organization of which mission is to induce long-term fund for building and repairing sports facilities. (2) Acquiring economic benefit by selling the right to call sports facilities after company names. (3) Building all weather and multi-purpose sports facilities and practically using after games. 2) Sports Goods (1) Following consumers' demand for design and colors of goods. (2) Developing marketing strategy by opening sports goods expo. (3) Reinforcing the information network among company groups. (4) Acquiring government support for developing sports goods marketers. (5) Developing new kind of leisure goods.

사군자탕이 L1210 세포를 이식한 마우스의 면역세포에 미치는 영향

殷載淳,金大根,柳東和,權鎭,徐龍勳,蘇俊魯,全焄,吳贊鎬 우석대학교 의약품개발연구소 1997 藥學硏究誌 Vol.2 No.-

The purpose of this research was to investigate effects of Sa-Kunja-Tang(SKT) on immune cells of L1210 cell-transplanted mice. The apoptosis and T lymphocytes subopoulation were tested using a flow cytometry, and the proliferation was tested using a MTT assay. Nitric oxide production from mouse peritoneal macrophage was tested using a Griess reagents, and the phagocytic activity of mouse peritoneal macrophage was tested using a lucigenin chemiluminescence. SKT suppressed apoptosis of T-lymphocytes induced by L1210 transplantation. SKT decreased nitric oxide production from mice peritoneal macrophages increased by L1210 transplantation, and the phagocytic activity decreased by L1210 transplantation. These results suggest that SKT suppresses T lymphocyte apoptosis and macrophage activity in L1210 transplanted mice.

개 원발성 면역매개성 혈소판 감소증 증례

유찬,임수정,이선희,박형진,김태신,송은식,김덕환,송근호 忠南大學校 獸醫科大學 附設 動物醫科學硏究所 2009 動物醫科學硏究誌 Vol.16 No.1

A 13-year-old, castrated male, Maltese-dog was admitted to the Veterinary Medical Teaching Hospital of Chungnam National University with the history fo petechiae. On physical examination, she had petechiae and ecchymoses at her back, bilateral inguinal region, and inner part of ear pinna. CBC indicated neutrophilia and severe thrombocytopenia. A few platelets, no autoagglutination of RBC, and no spherocyte were observed. Coagulation profile demonstrated normal PT, and aPTT. No significant findings was not found on serum biochemical profile and electolytes test. FNA of a splenic mass which was found on the abdominal radiograph and sonograph demonstrated extramedullary hematopoiesis, Proteinuria was observed on urinarysis. Primary immune-mediated thrombocytopenia was diagnosed by ruling out of other underlying disease, severe thrombocytopenia, and response to immunosuppressive therapy. Prednisone and antibiotics were administered orally and parenterally, respectively. After altering prednisone to azathioprine, the number of platelets was recovered to normal range and petechiae and ecchymoses were improved.