Continuous Wave of Condensation Technique으로 근관충전시 치근면 온도상승 분석

김영주,황윤찬,김선호,황인남,최보영,정영진,정우남,오원만 전남대학교 치의학연구소 2003 구강과학 Vol.15 No.4

This study was conducted to evaluate safety to the supporting tissues of the root while the root canal is obturated using continuous wave of condensation technique. A extracted maxillary central incisor was prepared for repeated canal obturation. After conventional access opening, working length was then established to the point 1㎜ from anatomical root apex. The root canal was prepared with GT rotary Ni-Ti file (Dentsply Maillefer, Switzerland). Five thermocouples (Onega Engineering Inc., USA) were placed at 2㎜ increments on one side beginning 1㎜ from the anatomical root apex and the other five thermocouples at 2㎜ increments on the other side beginning 2㎜ from it. For obturation, a nonstandardized medium size gutta-percha cone and a ML Buchanan plugger (Analytic technologies, USA) were selected. After drying of root canal, AH 26 root canal sealer (Dentsply Detrey, Germany) was applied on the wall of the root canal. Baseline temperature was measured on the root surface. The ML size plugger was preheated for 2seconds and then the real temperature of it was recorded before insertion into the root canal. The root canal was obturated with continuous wave of condensation technique as described by Buchanan. The root surface temperature was recorded during obturation and it was performed ten times at each of the following temperature settings: 150℃, 200℃, 250℃ and 300℃. After completion of the temperature recording, the dentinal-cementum thickness at each sites where thermocouples were attached was measured. The data were analyzed using one-way ANOVA followed by Scheffe's test and linear regression test. The results were as follows. 1. When the temperature was set at 150℃, 200℃, 250℃ and 300℃ on the digital display of System B HeatSource, the real temperature of the plugger at the 1㎜ point from the tip revealed 130.82±2.96℃, 158.00±5.26℃, 215.92±6.91℃ and 249.88±3.65℃ respectively. 2. The position of 8 ㎜ from the anatomical apex showed the highest temperature increase at each temperature settings and it was significantly higher than those of other positions (p<0.01). The temperature rise was constantly increased toward coronal portion from apex of the root. 3. The maximum temperature increase on the root surface was 2.37±0.09℃ at 150℃ setting, 3.11±0.12℃ at 200℃ setting, 3.93± 0.09℃ at 250℃ setting and 5.69± 0.15℃ at 300℃ setting. These results suggest that it be relatively kind to the supporting tissues of the root that the root canal is obturated using continuous wave of condensation technique at 150℃, 200℃, 250℃ and 300℃ temperature settings on digital display of System B HeatSource.

Continuous Wave of Condensation Technique으로 근관충전시 치근면 온도상승 분석

김영주,황윤찬,김선호,황인남,최보영,정영진,정우남,오원만 大韓齒科保存學會 2003 Restorative Dentistry & Endodontics Vol.28 No.4

This study was conducted to evaluate the temperature rise on the root surface while the root canal is being obturated using continuous wave of condensation technique. Maxillary central incisor was prepared for repeated canal obturation. Ten thermocouples (Omega Engineering Inc., Stanford, USA) were placed at 1mm increment from the anatomical root apex. The real temperature of Buchanan plugger was recorded before insertion into the root canal. The root canal was obturated with continuous wave of condensation technique as described by Buchanan and the root surface temperature was recorded during obturation at 150℃, 200℃, 250℃ and 300℃ temperature settings of System B HeatSource (Model 1005, Analytic technologies, Redmond, WA, USA). After completion of the temperature recording, the dentinal-cementum thickness at each sites was measured. The data were analyzed using one-way ANOVA followed by Scheffe's test and linear regression test. The results were as follows. 1. When the temperature was set at 150℃, 200℃, 250℃ and 300℃ on the digital display of System B HeatSource, the real temperature of the plugger at the 1mm point from the tip revealed 130.82±2.96℃ 158.00±5.26℃, 215.93±6.91℃ and 249.88±3.65℃ respectively. 2. The position of 8 mm from the anatomical apex showed the highest temperature increase at each temperature settings and it was significantly higher than those of other positions (p<0.01). The temperature rise was constantly increased toward coronal portion from apex of the root. 3. The maximum temperature increase on the root surface was 2.37±0.09℃ at 150℃ setting, 3.11±0.12℃ at 200℃ setting, 3.93±0.09℃ at 250℃ setting and 5.69±0.15℃ at 300℃ setting respectively. These results suggest that it be relatively kind to the supporting tissues of the root that the root canal is obturated using continuous wave of condensation technique at 150℃, 200℃, 250℃ and 300℃ temperature settings on digital temperature display of System B HeatSource.

대동맥 협착증과 동반된 출혈성 위장관 동정맥 기형에서 Estrogen-Progesterone 치료 1예

김도연,김화정,김효정,남준식,박수영,박영미,신정은,주미순,황민규,정혜경,손혜영,이선영,이한주 大韓消化器內視鏡學會 1999 Clinical Endoscopy Vol.19 No.부록2

좌심실비후 환자에서 베타차단제의 급중단이 임상증상 및 좌심기능에 미치는 영향

황종현,김영태,배용학,임현주,조용근,채성철,전재은,박의현 慶北大學校 醫科大學 1997 慶北醫大誌 Vol.38 No.1

목적 : 베타 차단제와 칼슘 길항제의 장기투여로 안정상태에 있는 비후형 심근증이나 고혈압성좌심실비후 환자에서 이들 약제를 갑자기 중단하였을 때 혈역학, 심기능 및 임상상에 미치는 영향을 알아보기 위하여 본 연구를 시행하였다. 대상 및 방법 : 경북대학교 병원 순환기내과에서 통원치료중인 비후형 심근중 환자 5명과 심한좌심실비후를 동반한 고혈압 환자 6명(남자 6명, 여자 5명)을 대상으로 장기투여 중이던 베타 차단제와 칼슘 길항제를 최소 5일 중단한 후 임상증상, 혈압 및 심박수의 변동, 그리고 투약중지 전후에 도플러 심초음파도를 기록하여 좌심실내경, 벽두께, 좌심실근량, 구혈율 및 승모판혈류속도곡선의 변화를 관찰하였다. 결과 : 1) 약물치료 중단 후, 베타차단제의 경우 9명 중 6명에서, 그리고 칼슘길항제 및 디소피라미드를 복용하던 각 1명, 도합 7명의 환자에서 심계항진, 호흡곤란의 악화, 흉통이 관찰되었고, 심계항진을 호소한 1예에서는 심방세동이 재발되었다. 2) 혈압, 심박수, 확장말기 및 수축말기 좌심실내경, 심실중격 및 심실후벽 두께, 좌심실근량 및 구혈을 모두는 치료약물 중단 전후에 다소 변화하였으나 유의하지 않았다. 3) E파 최고속도와 E파 시간속도적분은 약물투여 중단 전후에 유의한 변화는 없었으나, A파 최고속도와 A파 시간속도적분은 중단 후에 각각 유의하게 증가하였으며(both P<0.01), E/A 최고속도비와 E/A 시간속도적분비는 각각 유의하게 감소하였다(both P<0.01). 한편, E파 감속시간, 등용이완시간 그리고 A-Ar 간격[A파의 최고점에서 A reversal(Ar)파의 최저점간의 시간] 모두는 중단 후 유의한 변화가 없었다. 1 결론 : 비후형 심근증 이나 고혈압성 좌심실비후 환자에서 장기투여중이던 베타 차단제와 칼슘길항제를 일시적으로 중단하였을 때 임상중상의 악화와 더불어 확장기 기능의 변화를 초래하였다. 따라서 약물치료로 비록 임상적으로 안정상태에 있더라도 치료를 갑자기 중단할 때는 주의해야 할 것으로 생각된다. Objectives : This study was done to evaluate the changes in clinical findings, hemodynamics and cardiac function after abrupt withdrawal of longterm beta-blockers and/or calcium channel blockers in hemodynamically stable patients with hypertrophic cardiomyopathy and left ventricular(LV) hypertrophy associated with hypertension. Methods : Eleven patients with hypertrophic cardiomyopathy(n=5) and LV hypertrophy associated with hypertension(n=6) were studied. Symptom assessment, blood pressure, electrocardiography and echocardiography including pulsed Doppler examination were obtained before and at least 5 days after abrupt cessation of beta-blockers and calcium antagonists. Results : 1) Deterioration in symptoms(i.e. palpitation, aggravation of dyspnea and chest pain) was observed in seven patients after abrupt withdrawal. 2) There were no significant changes in blood pressure, heart rate, end-systolic and end-diastolic LV dimensions, interventricular septal thickness, LV posterior wall thickness, LV mass, and ejection fraction before and after drug withdrawal. 3) Doppler time intervals and E wave peak-velocity and time velocity integral(TVI) were not significantly changed before and after drug withdrawal. But A wave peak-velocity and TVI after abrupt withdrawal were significantly increased(both p<0.01), and E/A peak-velocity ratio and TVI ratio were significantly decreased(both p<0.01). Conclusions : These findings suggest that temporary omission of beta blockers and calcium channel blockers develops deterioration in symptoms and LV diastolic dysfunction in hypertrophic cardiomyopathy and LV hypertrophy associated with hypertension. Physicians should avoid abrupt withdrawal of longterm beta blockers in LV hypertrophy.

폐목질을 사용한 모르터의 물성에 관한 기초적 연구

황병준,김영주,강태경,정근호,임서형,정상진 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2(구조계)

Recently, as the alternatives to preserve environment such as effective usage of wastes or unusable resources are drawing attentions, researches and measures for the two tasks, which are reuse of waste wood and development of eco friendly materials, are being examined and established in various fields. However, they are still insufficient. Therefore, in this study, for the efficient application of waste woods and eco-friendly effects, mortar was produced using sawdust as the waste wood and mineral material cement for combination, in order to produce inorganic boards using waste woods, which were made when sawing. This study attempted to suggest a basic material about the physical properties of mortar, which used waste woods, after examining the features of wood mixture rate, water-cement rate, congelation according to the mixture rate of the setting accelerator, specific gravity, compression intensity, and bending intensity as experiment factors.

벼의 배발생 세포로부터 식물체 재분화

황성진,정병균,민영주,황 백 全南大學校 農漁村開發硏究所 1992 農業科學技術硏究 Vol.27 No.-

벼 현탁배양 세포로 부터 체세포 배발생에 의해 재분화 개체가 이루어졌다. 배발생에 의해 재분화 개체가 이루어졌다.배발생 캘러 스는 2.5mg/ℓ2.4-D 가 첨가된 MS 배지에서 유도되었으며,현탁배양은 5mM proline, 2.5mg/ℓ2.4-D 그리고 200mg/ℓcasein hydrolysate 가 첨가된 N6 medium 에서 계대배양하였다. 이와같은 현탁배양세포는 세포질이 충만된 세포들로 구성되었으며,액체배지에서 10개월이상 유지시켰을때,체세포 배 발생 빈도는 지속적으로 유지되었으며 현탁배양세포를 5mg/ℓkinetin, 1mg/ℓNAA, 1mg/ℓABA, 3% sucrose 와 1% sorbitol이 첨가된 MS 고체배지로 옮겨졌을때 높은 빈도의 식물체 재분화가 이루어졌다. This study was carried out to obtain the high frequency of plant regeneration from cultured cells of rice(Oryza sativa L. ev Taebaeg). Embryogenic callus was induced from matured-seed on MS medium conatining 2.5mg/ ℓ 2.4-D and used to establish embryogenic cell suspension culture. Embryogenic cell suspension cultures were subcultured every one week in N6 medium supplemented with 5 mM proline,200mg/ℓcasein hydrolysate and 2,5mg/ℓ2.4-D. Embryogenic suspension cultures were composed of cells that were densely cytoplasmic, potentially embryogenic and maintained for more than 10 months. Somatic embryo formed when embryogenic cell suspentions were transferred to solid medium which consisted of MS medium containing 5mg/ℓkinetin, 1mg/ℓNAA, 1mg/ℓABA,3% sucrose and 1% sorbitol and subsequently the high frequency of plant regeneration were achived.

Removal of Cochlodinium polykrikoides using a novel material produced from sediment - A field study

Young一Chae Song,S. Sivakumar,Sung-Chung Ko,Eung-Ju Hwang,Qtae Jo 한국항해항만학회 2007 한국항해항만학회 학술대회논문집 Vol.2 No.추계

The present study was conducted in three fields at Namhae to examine the removal efficiency of organic free, heavy metal immobilized sediment on Cochlodinium polykrikoidesand on sea water quality. The present study results concluded that removal efficiency was depends on the initial number of red tide cells. There was no drastic change in the sea water quality after sediment spray. For the comparison of effectiveness of betonite, zeolite and lime were mixed with sediment did not show any marked difference in removal. Finally, the present study evaluated 5Og/m² sediment is Sufficient to remove 100% cells density, even though various environmental factors are interfering the mechanism.

農民所得增大를 위한 고구마의 栽培와 利用에 관한 硏究

黃鍾奎,梁熙天,崔定植,權涌周 全北大學校 1977 論文集 Vol.19 No.-

New varieties of sweet potato Sinmi and Hwangmi were cultivated in the reclaimed hilly area of four kinds of soil series in Jeonbug province and their growth conditions such as cutting time, row spacing, application of fertilizers and plant growth regulators and covering effect were investigated. Besides these studies on cultivation of sweet potatoes, experiments on the change of chemical components of sweet potato tubers, adaptibility for storage and drying of sliced sweet potato tubers were carried out. The results are summarized as follows : 1. The early cutting of May 20, alley of 90 X 20cm, application of potassium(28kg/10a)and covering produced the high yield of sweet potatoes. The apllication of OED green did not increase the yield of sweet potatoes, 2. The yield of Hwangmi was higher than that of Sinmi. These two varieties of sweet potatoes grew well in all the test soil series except Bansan. By early cutting of May 20, the highest yield of Hwangmi was obtained in Songjung series soil and the highest yield of Sinmi was in Yesan. 3. Starch content was higher in Sinmi than in Hwangmi while yield of starch per unit area was high in Hwangmi because of its high yield of sweet potato tubers. Both Hwangmi and Sinmi showed very high water content of more than 70 per cent. The highest yield of total solid matter from Sinmi was on September 15 and that from Hwangmi on September 30. Sinmi and Hwangmi harvested on September 30 showed the highest starch content. 4. Variation in water content, starch, soluble sugar, protein and fat content during storage was minimum in the sweet potatoes stored in the temperature controlled storage chamber and was maximum in those stored in the cave under ground. As a result, percent of grade A sweet potatoes remaining was highest in the temperature controlled storage chamber and lowest in the cave under ground. 5. Hwangmi was more susceptible to Rhizopus nigricans than Sinmmi, especially under the humid condition. 6. Shape and thickness of slice did not affect the yield of dried sweet potatoes but affected the time needed for drying. Depending on the thickness and the shape of slice, variations of 36 hours and 12 hours in drying time were observed respectively. Drying table was most effective in drying of sweet potatoes and drying rack was also effective and required 2 days less time than mat. Dipping in water did not show any effect on drying time but improved the color of dried sweet potatoes.

槐花에 關한 文獻的 考察

朱榮丞,黃成淵 又石大學校 1998 論文集 Vol.20 No.-

In order to strengthen objectivity and availability of oriental herb medicine, the standard formula for herbs has been attempted to set up by documentary testing. original herbs which were recorded in authorized document. The object herb midicine is SOPHORAE FLOS. Specially the internal and external morphological standard in this study is expected to supply the search for several physiochemical reaction, biological reaction, determination of indicator material and indicator material and identification of gene with basic sources in the future. As for the supplement about this search, considering that many kinds of same genus-degree of relatedness are being current now, it is necessary that each herb should be collected only after identifying and that the succeeding search of each herb should be proceeded for the regular establishment of internal and external standard.

Apt. 거주주부의 부엌공간과 식생활 가사작업에 대한 만족도 연구

황경애,주영애 진주산업대학교 1994 論文集 Vol.33 No.-

This study is to investigate the satisfaction of kitchen space and household work. 223 homemakers of upper and middle class residing in Seoul were slected for the survey. For the statistical analysis of data, frequency, Pearson's γ, F-test, regression and cronbach's α for reliability were performed. The satisfaction of kitchen space was significantly related to the satisfaction of household work. Significant differences in degree of satifaction of kitchen space could be found independent variables.