수종의 엔진 구동형 니켈-타이타늄 합금파일의 절삭각에 따른 근관성형 효과에 관한 전자현미경적 연구

전인수,금기연,박성호,윤태철 大韓齒科保存學會 2002 Restorative Dentistry & Endodontics Vol.27 No.6

The purpose of this in vitro study was to compare the effects of root canal debridement following rotary Ni-Ti instruments with positive versus negative rake angle. Seventy sound, extracted human anterior teeth & premolars were randomly divided into four groups. The used rotary instruments were Ni-Ti HERO642(Micro-Mega in France, 20 specimens), Ni-Ti ProFile(Maillefer, Ballaigues, Switzerland, 20 specimen), stainless steel engine reamer(Mani, Matutani Seisakusho Co.,Japan, 20 specimen) and negative control group(10 specimens) was only extirpated with barbed broach(Mani, Matsutani Seisakusho Co., Japan) Group 1 & 2 teeth were prepared to a #40 at the apex followed by 1 mm using crown-down technique. Group 3 teeth were instrumented from a #15 to a #40 in sequential order. After preparation and final irrigation, the roots split longitudinally into a bucco-lingual direction. Root halves were cross-sectioned in apical third portion again. all root specimens were prepared for SEM investigation & photographed. Separate evaluations were undertaken for smear layer on prepared walls with a five score-index for each using reference photograph in root halves. the penetration depth of smear layer into dentinal tubules was also estimated in the other halves. the following results were obtained : 1. Smear layer was observed on all the prepared walls with three experimental groups except negative control group 2. Smear layer characteristics1) HERO 642 groups showed snowy & dusty appearance & were observed only few some dentinal tubuli open on the prepared walls, and the penetration depth of it into dential tubules may be 1-2 ㎛ thick. 2) ProFile groups showed shiny & burnished appearance & complete root canal wall covered by a homogenous smear layer with no open dentinal tubuli and penetration depth of it into dentinal tubules may be 1-2㎛ thick. 3) Engine reamer groups showed obviously file's passed tracks on the prepared walls & were observed complete root canal wall covered by a homogenous smear layer with no open dintinal tubuli. The results revealed that a completely clean root canal could not be achieved regardless of positive & negative rake angle, which is in accordance with the majority of studies on root canal cleanliness In conclusion, throughout irrigation with antibacterial solutions or chelating agents is recommended to remove the smear layer on prepared canal walls.

도심 공원의 음 풍경 디자인을 위한 실험적 연구

이태강,송민정,전지현,장길수 대한건축학회 2005 대한건축학회논문집 Vol.21 No.1

This study is an experimental study to introduce the soundscape design in urban parks Objective 4 urban parks were surveyed And four or three subdivision area in these parks were investigated the sound source frequently to be heard and the degree of satisfaction for visual and auditory atmosphere measuring the sound level in 5 minute subjective response to soundscape for each subdivision area were earned out using 7 scale S D method based on pair of adjectives In order to recognized the effect environment sound (bird Sing, sweet ecological music, and nature sounds)for enriching the present soundscape, this study analyzed the subjective response for soundscape before and after providing environmental sound Result of the evaluation of public perception and their sound were vaned at the each subdivision area, which represented the special characteristics of the urban parks The score for image of the places were always higher than those of the sounds, thus visual Image were affected more positively than auditory image The effect of the environmental sound usually resulted in improvement of the subjective cvaluation at cach subdivision area Factor analyzing of the 25 korean vocabulary for using S D method could be induced the appropriate three factors "impression", "calmness" and "delight" These factors can be used for soundscape design of sound sources and images to provide

骨隨細胞에서의 染色體 分折法에 대한 硏究

김태전 서울保健大學 1987 論文集 Vol.7 No.1

청서(Sciurus vulgaris coreae) 대뇌피질의 Neuropeptide Y 면역반응신경세포의 분포

김태전 서울보건대학 1995 서울보건대학 부설 한국보건과학연구소 논문집 Vol.1 No.1

The areal and laminar distribution of neuropeptide Y (NPY)-immunoreactive (IR) perikarya and fibers was investigated using immunohistochemistry in the cerebral cortex of the adult korean squirrels. The neurons which were immunostained by anti-NPY seems to be interneurons None of the pyramidal cells were immunoreactive to anti-NPY. Generally, most NPY-IR neurons were distributed in II - III and V- VI layers in all the areas. NPY-IR neurons were bipolar, bitufted or multipolar in shape, and were medium (10-15m) in size. The general orientation of NPY-IR fibers in each layer was essentially identical in all the areas studied ; (1) roughly parallel fibers to the pia in layer I ; (2) vertically oriented fibers in layer II - V: (3) roughly parallel fibers to the corpus callosum in layer VI. The density of NPY-IR perikarya in the cingulate and frontal cortex was high, and that of the insular and temporal cortex was low, and that of the other cortex was moderate. The insular and perirhinal cortex had more density of NPY - IR fibers than that of the other cortex. The regional differences in the distribution of NPY-immunoreactive neurons and fibers in the cerebral cortex may reflect innate characteristics of local circuit serving specialized functions.

Streptomyes strain에 의한 Polymeric 염료와 Azo염료들의 탈색에 관한 연구

김태전,윤경하,최한영 서울보건대학 1998 서울보건대학 부설 한국보건과학연구소 논문집 Vol.5 No.1

Two Actinomycetes strains that it was excellent for degradablitiy of lignocellulose and lignin, and the highest for decolorization ratio of Remazol brilliant blue R(RBBR) dye, which was good relationship with degradabiliy of lignocellulose and lignin were identified finally with Streptomyces halstedii scabies SAl-36과 Streptomyces lavendulas SA2-14. Authors used these two strains to examine into the visiable spectrum and decolorization ratios of Azo dyes : amaranth, metanil yellow, orangeII. tropaeolin O, congo red, and Polymeric dye; poly R-478. The results to be examined were summarized as following. ① The visible spectrum of poly R-478, and amaranth, congo red. metanil yellow, orange II, tropaelin O were indicated that poly R-478 was 520/350nm. and amaranth. 522/324nm ; congo red. 490/434nm ; metanil yellow. 436/380nm ; orange II 484/310nm ; Tropaeolin O, 410/324 nm ② Each decolorization ratios of Azo dyes and Polymeric dye by Streptomyces halstedii scabies SA1-36 were showed that tropaeolin O was 79.3% ; poly R-478, 78.8% ; amaranth, 75.4%; orange II, 67.0% ; metanil yellow, 51.4% ; and congo red, 47.5%, so that the decolorization ratios of tropaelin O was the highest, and congo red, lowest. Consequently Streptomyces halstedii scabies SA1-36 was regarded as a good strain for the decolorization of tropaelin O into Azo dyes and poly R-478. ③ Each decolorization ratios of Azo dyes and Polymeric dye by Streptomyces lavendulas SA2-14 were showed that tropaeolin O was 81.4%; poly R-478, 80.0%; orangeII, 74.1%; congo red, 65.0%; metanil yellow, 57.7%, so that the decolorization ratios of tropaelin O was the highest. and secondly poly R-478. higher. and other dyes indicated the decolorization ratios of 57.7%-74.1%. Consequently Streptomyces halstedii scabies SA1-36 was regarded as a good strain than Streptomyces halstedii scabies SA1-36, and a good strain for the decolorization of tropaelin O into Azo dyes and poly R-478. ④ Each decolorization ratios of Azo dyes and Polymeric dye by Streptomyces badius ATCC 39117 (control group) were showed that tropaeolin O was 80.3% ; poly R-478, 79.0% ; amaranth, 70.7%; orange II, 66.4% ; congo red, 57.4% ; methenil yellow, 50.3%, so that the decolorization ratios by control group was the highest in tropaelin O, and secondly higher in poly R-478 as well as two experimental strains. ⑤ Two experimental strains were decolorized all of the examined dyes at the early days of culture, but control group, at the latter days of culture. In the above results, two experimental strains that were identified as Streptomyces halstedii scabies SAl-36과 Streptomyces lavendulas SA2-14 was regarded as a good strains for the decolorization of tropaelin O into Azo dyes and Poly R-478, and indicated 1-8% of high decolorization ratios than control group in all of Azo dyes and poly R-478, and among three strains Streptomyces lavendulas SA2-14 was thought as the best strain, when it were based on the days of culture, two experimental strains were decolorized all of the examined dyes at the early days of culture, but control group. at the latter days of culture. In the future, it will be necessary to invastigate what kind of dyes series with the object of more dyes which are decolorized more effectively by two experimental strains, also it will be more important subjects to examine into enzymes produced by Actinomycetes and establish exactly mechanism of decolorization by various produced enzymes.

江原道 一部地域 住民들에서 肝炎B 抗原 陽性率에 관한 調査

김태전 서울保健大學 1982 論文集 Vol.2 No.1

강원도 홍성군 어론리 주민 353명을 對象으로 HBs抗原을 檢出한 結果들을 要約하면 다음과 같다. 1) 어론리 주민 전체에 있어 HBs抗原의 陽性率은 5.1%였다. 2) 性別과 年齡에 따른 HBs抗原의 陽性率은 남자가 7.8%, 여자가 3.0%로 남자가 높은 傾向을 보였으며 年齡에서는 1~10세群이 6.6%, 31~40세群이 5.6%, 11~20세群이 5.5%, 21~30세群이 5.0%, 50세 以上群이 3.5%順으로 나타났다. 3) Group別 HBs抗原의 陽性率에서는 未就學 兒童이 18.8%, 中學生이 9.1%, 國民學生이 5.3%, 기타 group이 3.4%順으로 나타났다. 4) 血液型의 分布에서는 A型이 30.9%. O型이 30.0%, B型이 27.8%. AB型이 11.3%順이었고, 그에 따른 HBs 抗原의 陽性率은 O型이 5.7%, B型이 5.1%, AB 型이 5.0%, A型이 4.6%順이었다. 5) 두 지역 573명의 住民에 대현 HBs 抗原 陽性率은 5.9%였다. 국민전체에 대한 보다 정확한 HBs 抗原의 陽性率을 알기 위해서는 어느 個人의 노력 만으로는 불가능한 일이므로 各界의 硏究家들이 힘을 모아 多方面에서 정확한 感染者를 索出 報告하고 感染者에 대한 적절한 對策이 必要하다고 본다. This study was worked to investigate the positive rate of HBs antigen knowen as an indicator of hepatitis B virus carrier in the inhabitants of Kang Won-Do areas. The results were as follows: 1) The positive rate of HBs antigen in the inhabitants was 5.1%, 2) When the inhabitants were grouped by sex, the positive rate was 7.8% in the male group and 3.0% in the female group. This showed the trend of higher positive rate in male than in female. when the inhabitants were grouped by age, The positive rate was 6.6% in the group of 1-10 years of age, 5.6% in group of 31-40, 5.5% in the group of 11-20, 5.0% in the group of 21-30, and 3.5% in the group of more than 50. 3) The posive rate was 18.8% in the group of pre-school children, 9.1% in the group of middle school students, 5.3% in the group of elementary school children, and 3.4% in the other group. The difference of the rate among the groups seemed to have no significance. 4) 30.9% of the inhabitants had A type of blood, 30.0% had 0 type, 27.8% had B type, and 11.3% had AB type. The blood type seemed to have no significant relation with the spositive rate of HBs antigen.

갑상선에서 세침흡입생검에 의한 세포학적 진단분석

김태전 대한임상병리사협회 1994 대한임상병리사회지 Vol.26 No.1

The Fine Needle Aspiration Biopsy Cytologic(FNABC) preparation made from 1,640 consecutive cases among 1,822 consecutive cases attending at Dept. of Histopathology, college of medicine, H university who were suspected of thryoid diseases were studied. The data analysed in aspects of sex, age, thyroid diseases and cytologic special features were showed in each thyroid disease The results were as follows. 1) The signification of fine needle aspiration biopsy cytologic method was 90%, in sex female were more than male as 93.4%, in ages the prevalence of thyroid diseases were higher in the group of 21-40 years of age(74.6%) and their mean ages was 37.6 years of age. 2) The fine needle aspiration biopsy cytologic findings of 1,822 consecutive cases showed benign, hyperplastic conditions in 1,137 cases (62.4%), inflammatorychanges in 237 cases(l5.0%), neoplasia nodules in 230 cases(12.6%), and incomplete diagnosis due to insufficient materials in 182 cases. mean ages were 35years, 33years and 45years of age in each thyroid disease. 3) 1,137 cases with benign, hyperplastic conditions were classified by 555 cases with nodular nontoxicby 455 cases with cystic changes( 40.0%), and by 127 cases (11.2 %) with hyperplastic conditions(Grave's disease)and mean ages of it`s peak incidence were 37years. 33 years and 35years of age. 4) The analysis of 273 cases with inflammatory changes showed 182 cases with chronic thyroiditis(66.7%), 73 case with subacutic thyroiditis(26.7%), and18 cases with acutic thyroiditis(6.6%). In each inflammatory disease, mean ages of it's peak incidence were 31 years, 42 years and 28 years of age. 5) The analysis of 230 cases showed 109 cases with follicular neoplasia (47.4%), papillary carcinoma(40.0%), 15 cases with medullary carcinoma(6.5%), 9 cases with Hurthle cell tumor(3.9%), 4 cases with undifferented carcinoma(1.8%), 1case with other carcinoma(0.4%) and mean ages of it`speak incidence were 35years, 36years, 44 years, 42years, 55years and 58years of age. 6) Cytologic special features of each thyroid disease were described in detail in the part of discussion and from Fig 1 to Fig 12. In the summary of above results, I thought that the fine needle aspiration biopsy cytologic method was not only usefull for the diagnosis and classification of thyroid diseases, but also recommendable for diagnosis and classification of other diseases.

한국 토양에서의 방선균 분리와 PAH화합물의 분해능에 관한 연구 : Rimazol Brillant Blue R염료의 탈색을 중심으로

김태전 서울保健大學 1995 論文集 Vol.15 No.1

Decolorization of remazol brilliant blue R(RBBR)dye, which can take the place of the degradation of polycyclic aromatic hydorcarbons(PAHS) by actinomycetes isolated in 67 soil samples collected at 8 areas of Korea, and parameters that may influence decolorization were examined from February, 1994 to March, 1995. The results were summarized as following. ① Each actinomycetes isolated on Al medium, A2 medium and A3 medium from 67 soil samples were 822 strains, 763 strains, and 783 strains. therefore Al selective medium was very good for isolation of actinomycetes ② The optimal pH of soil samples for growth of actinomycetes was 7.0∼7.5. ③ The optimal temperature for degradation of lignocellulose, lignin, and decoloization of RBBR(0.005%)dye was 30℃. ④ Strains screened in A1S medium for the degradation of lignocellulose were 205 strains among 822 strains isolated in Al medium, strains screened in M3 IND medium for degradation of lignin were 108 strains among 205 strains, and 108 strains were identified finally with one strain of amycolata autotrophica and 13 strains of streptomyces. Strains indicated decolorization ratios over 50% by agar plug and standing culture were 17 strains among 108 strains, and strains showed decolorization ratios over 60% by cell suspension (O.D; 0.85, inoculation volume: 0.2ml) and shaking culture were 12 strains among 17 strains. ⑤ Decolorization ratios of 12 strains according to carbon sources(0.2%) were very good in glycerin with 73.2% to streptomyces halstedii scabies SAl-36 and in cellobiose with 73.1% to streptomyces lavendulas SA2-14. ⑥ Decolorization ratios according to the concentrations of cellobiose to streptomyces lavendulas SA2-14 and of glycerin to streptomyces halstedii scabies SAl-36 were the most high ratios with 74.1% in 0.25% cellobiose and with 73.4% in 0.25% glycerin. In the above results, it will be possible in the future to screen actinomycetes which can degrade PAH compounds included in natural, industrial wastes and stain solution discharged during to stain tissue preparations through decolorization abillity of RBBR dye by actinomycetes.

토양에서 분리된 방선균들에 의한 Rimazol Brilliant Blue R(RBBR) 염료의 탈색에 질소원과 pH가 미치는 영향

김태전,김승곤,윤경하 서울保健大學 1997 論文集 Vol.17 No.1

Many workers had reported that the degradation of lignocellulose and lignin by white rot fungi were significantily correlative with the degradation of phenol or PAHs (Polycyclic aromatic hydorcarbons) compounds and the decolorization of a various dyes, specially RBBR (Remazol brilliant blue R) and Poly R-478 dyes. but it were not known distinctly that the degradation of these and the decolorization of these by Actinomycetes were related to the degradation of phenol or PAHs compounds, and author had examined in relationship between the degradation of lignocellulose or lignin and the decolorization of RBBR by Actinomycetes isolated in 67 soil samples collected at 8 areas of Korea from February, 1994 to March, 1995. In the experiment, There were selected two strains identified as Streptomyces halstedii scabies SA1-36 and Streptomyces lavendulas SA2-14 which had good correlation between the degradation of lignocellulose or lignin, and it were investigated that the cultural parameters to maximize the decolorization ratios of RBBR by two strains, as the results, Streptomyces halstedii scabies SA1-36 revealed each the highest decolorization ratios with 73.4% in 0.30% glycerin and Streptomyces lavendulas SA2-14, with 74.1% in 0.25% cellobiose at 30℃ in 20 days of culture. There were used their results as basal data in this study that examined the effects of nitrogen sources and pH to maximize the decolorization ratios of RBBR. It were summarized as following that the results examined the effects of nitrogen sources and pH to maximize the decolorization ratios of RBBR by two strains. 1) It were the highest each as 75.7% in casein and 75.7% in yeast extract that the dicolorization ratios of RBBR by Streptomyces halstedii scabies SA1-36 and Streptomyces lavendulas SA2-14 strains according to nitrogen sources(0.l%). 2) It were the highest each as 76.8% in 0.1% casein and 78.3% in yeast extract that the decolorization ratios of RBBR by Streptomyces halstedii scabies SA1-36 and Streptomyces lavendulas SA2-14 strains according to the concentrations of casein and yeast extract. 3) It were the highest each as 76.8% in pH 7.6 and 79.4% in pH 6.6 that the decolorization ratios of RBBR according to pH by Streptomyces halstedii scabies SA1-36 and Streptomyces lavendulas SA2-14 strains. In the above results, we could knowe that it were each different as well as carbon sources that nitrogen sources and pH required between Streptomyces halstedii scabies SAl-36 and Streptomyces lavendulas SA2- 14 strains. and organic nitrogens influence more than inorganic nitrogens to decolorize RBBR dye and nitrogen sources and pH influence lower than carbon sources to decolorize RBBR dye. What`s more, we could knowe that it were very important to use newly formuliged optimal basal media maximize decolorization ratios of RBBR dye by Streptomyces halstedii scabies SAl-36 and Streptomyces lavendulas SA2-14 strains.

리그닌을 분해하는 Streptomyces lavendulas SA-14에 의한 염료의 탈색

김태전,윤경하 순천향대학교 기초과학연구소 1998 순천향자연과학연구 논문집 Vol.4 No.1

This study was undertaken to investigate the activity of ligninolytic enzymes and the decolorization capability of some dyes with streptomyces lavendulas SA-14 isolated from soil and identified. Most ligninolytic enzymes exhibited the maximal activity when the strain was grown in basal medium for 6 days. Activities of LiP 2 and VAO among these enzymes exhibited 14.25 and 11.23n㏖/㎎ protein respectively. Decolorization rate of amaranth, orange Ⅱ, tropaeolin O and poly R-478 was more than 72% on 10 days incubation while that of crystal violet and malachite green was 6.7% and 6.6% respectively.