상악동의 형태에 관한 방사선학적 연구

김봉영,김재덕 大韓口腔顎顔面 放射線學會 1991 Imaging Science in Dentistry Vol.21 No.2

The purpose of this study is to improve the availabilities of radiographic technics as diagnostic methods to evaluate maxillary sinus in dental clinic. For the morphologic study of maxillary sinus, 20 dry maxillas were used and intraoral standard views, orthopantomograms, and skull P-A views were taken. For measuring the vertical image magnification rates, 5 sites in maxillary molar regions of 5 dry mandibles were selected radndomly and 25 wires of the determined sizes for selected portions were attached to the sites, after then, intraoral radiograms with bisecting technic and orthopantomograms were taken. The acquired results were as follows: 1. The anterior extension of the maxillary sinus on orthopantomogram was the distal side of the canine in 45.45% of subjects, the mesial side of the canine in 27.27%, the lateral incisor in 9.09%, the mesial side of the 1st premolar in 9.09%, and the mesial side of the 2nd premolar in 9.09%. 2. The positional relationship between the floor of maxillary sinus and the apex of alveolar socket revealed superimposed type in 58.3% of subjects, approached type in 33.3%, and separated type in 8.4%. 3. The morphology of inferior border of maxillary sinus was simple V or U shape in edentulous stage and V or wide U shape in alveolar socket stage. 4. The vertical image length on intraoral film taken by bisecting technic was magnified by 27.23% on the average and the length on orthopantomogram by 12.35%. 5. The inferior borders of maxillary sinus coinciding with each of the areas bearing the anterior and the posterior teeth on skull P-A view were determined.

2-[(4-Cyanophenyl)amino]-3-chloro-1,4-naphthalenedione(NQ-Y15)의 돌연변이원성

김봉희,정기화,유충규,창동신,이기선,전선덕,소동수,채상호,문창규 한국환경독성학회 2000 환경독성보건학회지 Vol.15 No.4

2-[(4-Cyanophenyl)amino]-3-chloro-1, 4-naphthalenedione (NQ-Y15) was asssayed for its genotoxic potential by using Salmonella typhimurium reversion assay and in vitro chromosome aberration test on Chinese hamster lung cells. In the Ames test, NQ-Y 15 induced his+ revertants of Salmonella typhimurium TA 98 and TA1537, reaching levels twice the negative control values. But, NQ-Y15 induced only his^(+) revertants of Salmonella typhimurium TA1537 more than twice the control values under the condition with metabolic activation system. In the cytogenetic test on chinese hamster lung cells, NQ-Y15 showed significant chromosomal aberrations, but the incidence was significantly reduced in the presence of metabolic activation.

Toluene-Cyclohexane 혼합물의 에멀젼 액막분리에 있어서 막의 안정성에 관한 연구

김주덕,안봉전 東國專門大學 1996 金龜論叢 Vol.3 No.1

o/w/o(oil in water in oil)형 유화액막에 의한 2성분 탄화수소 혼합물인toluene-cyclohexane의 분리에 있어서 투과율, 막의 안정성과 분리계수에 미치는 영향을 계면활성제 농도 emulsion과 용매와의 교반속도 등을 변수로 하여 실험하였다. 계면활성제의 농도가 증가함에 따라 투과율은 증가하는데 0.5wt% 이상에서는 증가율이 둔화되었다. 막 파괴율은 0.1wt%에서 가장 낮게 나타났으며, 그 이상에서는 농도가 증가하면서 파괴율도 증가하였다. 또한 분리계수는 계면활성제의 농도가 0.5wt%에서 가장 높게 나타났다. 에멀젼 제조시 교반속도 변화에서는 투과율이나 막 파괴율에 큰 영향을 미치지 않는 것으로 나타났다. 막 강화제의 농도가 증가함에 따라 투과율은 감소하였고, 에멀젼과 용매의 접촉시 교반속도가 증가할수록 막 파괴율도가 증가하였다.

2-[(4-Cyanophenyl)amino]-3-chloro-1,4-naphthalenedione (NQ-Y15)의 돌연변이원성

김봉희,정기화,유충규,창동신,이기선,전선덕,소동수,채상호,문창규 德成女子大學校 藥學硏究所 2001 藥學論文誌 Vol.12 No.1

2-[(4-Cyanophenyl)amino]-3-chloro-1, 4-naphthalenedione (NQ-Y15) was asssayed for its genotoxic potential by using Salmonella typhimurium reversion assay and in vitro chromosome aberration test on Chinese hamster lung cells. In the Ames test, NQ-Y15 induced his+revertants of Salmonella typhimurium TA 98 and TA 1537, reaching levels twice the negative control values. But, NQ-Y15 induced only his+revertants of Salmonella typhimurium TA 1537 more than twice the control values under the condition with metabolic activation system. In the cytogenetic test on chinese hamster lung cells. NQ-Y15 showed significant chromosomal aberrations, but the incidence was significantly reduced in the presence of metabolic activation.

복합열화환경 하에서의 단면복구재의 철근부식특성 평가에 관한 실험적 연구

김영덕,박종호,조봉석,김용로,권영진,김무한 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1

The duties of the restorative material are to bear up against stress and to protect reinforcement corrosion. So the restorative material are estimated by various kinds of strength, permeability and etc. But to evaluate performance of the restorative material accurately, it is necessary to estimate their reinforcement corrosion directly in environment of combined deterioration. In this study, to evaluate performance of restorative materials, we compare their properties in terms of compressive and bending strength and permeability of water and air with actual reinforcement corrosion like ratio of corrosion area, weight reduction and corrosion velocity of steel bar under environment of complex deterioration. The results showed that strength and permeability of restorative materials are similar but their reinforcement corrosions are very different. And there is a case that strength and permeability of restorative material are better than normal concrete but reinforcement corrosions are worse.

Photon Noise의 실험적 고찰

朴奉斗,朴德圭 慶北大學校 師範大學 1974 敎育硏究誌 Vol.16 No.-

Statistics for the photon noise was checked and a relatively simple apparatus for the oservation of photon noise was constructed. We observed pulse shapes of photon noise and calculated noise voltage, anode current, counting rate and photoyield factor of RCA 931A PM tube. Also we checked the best condition for the measurement of photon noise.

생약을 이용한 기능성 화장품

안봉전,김주덕 東國專門大學 1996 金龜論叢 Vol.3 No.1

생약은 우리 조상들이 오래 전부터 사용된 것으로 이것을 화장품에 이용하여 새로운 차원의 천연 한방 화장품 개발이 이루어지고 있다. 그중 미백 효과를 입증하는 타이로시나아제 저해제로서 오매, 계피, 만형자, 하고초등이 미백제로서 그 기능이 우수하였고 보습효과는 당귀, 백지, 국약등이 효과가 좋았다. 피지분비 억제작용으로는 중약, 인삼, 진피등이, 육모와 양모작용으로서는 여정자, 백급, 백지, 하수조등이 효과가 있는 것으로 확인되었다.

광합성세균 Phodospirillum rubrum의 무기질소원의 이용

강봉조,오덕철,이동헌 濟州大學校 基礎科學硏究所 1997 基礎科學硏究 Vol.10 No.2

Rhodospirillum rubrum, a photosynthetic bacterium, was tested for the utilization of inorganic nitrogen sources such as NH₄Cl, NaNO₂ and NaNO₃. The cell growth was most abundant with NH₄Cl among three nitrogen sources regardless of aerobic or anaerobic condition. With usable nitrogen sources, the cell growth was always greater in anaerobic condition than aerobic condition. R. rubrum used NH₄Cl and NaNO₃, but not NaNO₂ as nitrogen source in anaerobic condition. But in aerobic condition, R. rubrum used all nitrogen sources. The sonsumption of total nitrogen by R. rubrum used was highest in the NH₄Cl medium among three kinds of media regardless of culture conditions. The pH of media were increased according to the cell growth. The production of nitrite from nitrate in the NaNO₃ medium was much greater in anaerobic condition than aerobic condition.

제주연안 갯녹음(백화) 지역의 해수에 분포하는 세균군의 분자생물학적 분석

강봉조,김미란,윤병준,이동헌,오덕철,강형일 濟州大學校 基礎科學硏究所 2002 基礎科學硏究 Vol.15 No.2

본 연구에서는 갯녹음(백화)현상이 세균생태계와 어떤 관련이 있는지에 대한 기초자료 및 정보를 얻기 위하여 갯녹음 현상이 일어난 제주도 성산과 강정지역 연안의 해수에 존재하는 세균군을 16S rRNA 증폭기법을 이용하여 조사하였다. 강정지역에서는 Alcanivorax, Paracoccus, Damselae, Pseudomonas, Rhodovulum, Silicibacter, Sulfitobacter, Roseobacter 등 다양한 종류의 세균이 분포되어 있었으며, Alcanivorax가 20%의 빈도로 가장 많이 나타났다. 반면, 성산 지역에서는 Pseudomonas속 균주가 우점종으로서 존재하였으며, Pseudomonas tolaasii(혹은 Pseudomonas corrugata)와 유연관계가 가까운 세균은 44%, Pseudomonas mandeli와 가까운 세균이 24%, Verrucomicrobiales와 가까운 세균은 4%, 기타 동정되지 않은 세균은 세 group으로 구분되었으며, 각각 8%, 8%, 12%를 차지하여, 두 곳에 분포되어 있는 세균군상이 상당한 차이점이 있음을 확인하였다. 갯녹음 지역인 강정과 성산 해수의 8월(표품 채집시기)의 수온은 27℃-27.5℃, 염분의 농도는 30.24-30.60%, pH는 8.23-8.36, 용존산소량(DO)은 각각 7.20-7.28로, 두 지역에서 매우 비슷한 것으로 조사된 바 있는데, 이는 수온이나 염분의 농도, 또는 pH보다는 다른 원인에 의하여 두 갯녹음 지역에 분포하는 세균군의 차이를 가져왔음을 제시해 주었다. In this study, the bacterial communities distributed in sea water of the whitening areas of Gangjeong and Seongsan, Jeju-do have been analyzed using the PCR amplification of 16S rRNA to obtain fundamental data and information on relationship of the whitening phenomenon and microbial ecosystem. In Gangjeong, diverse bacteria such as Alcanivorax, Paracoccus, Damselae, Pseudomonas, Rhodovulum, Silicibacier, Sulfitobacter, and Roseobacier have been found, and Alcanivorax was the most abundant clone. The most abundant clone from Seongsan was Pseudoinonas, of which Pseudomonastolaasii and Pseudonionas mandeli were most abundantly occurred in the frequency of approx 44% and 24%, respectively. Approx 4% of the bacterial clones closest to firruconiicrobiales and other unidentified clones were also found in Seongsan, suggesting there is a great discrepancy between bacterial communities from the whitening areas of Seongsan and Gangjeong. The mean tem- perature, chlorine concentration, pH, and dissolved oxygen (DO) of the sea water of Gangjeong and Seongsan in August of 2001 (sampling period) was 27℃-27.5℃, 30.24-30.60%, pH 8.23-8.36,7.20-7.28 ㎎/ℓ, suggesting other environmental factors except for the factors mentioned above might result in difference of bacterial communities distributed in both areas.

계면활성제 혼합 천연지방산유지 고형 비누의 세척성 및 생분해성 연구 : 생분해성을 중심으로 On Based Biodegradation

이봉연,류덕환,이태관 한국의류산업학회 2003 한국의류산업학회지 Vol.5 No.3

The purpose of the study was to get the valuable data for developing the new natural fat soaps which have an excellent biodegradation performance. Thus, natural fat soaps mixed with the two types of detergents (AOS and LAS) on the various concentrations were made and the biodegradation of the samples were analysed by Dissolved Oxygen method using active sludge. Also, the results were compared with the commercial synthetic detergents and market soaps. The results from the study were the followings: I. The plant fat soap and the wasted oil soap with the concentration of 5 mg/i and 15 mg/1 had an excellent biodegradation rather than animal fat soap. 2, There was little difference among samples with the concentration of 5 mgtl, but there was much difference among them with the concentration of 15 mg/l. 3. The periods for consuming oxygen of wasted oil soap mixed AOS and LAS was the fastest.