Tetracycline이 白鼠의 骨成長 및 鑛化作用에 미치는 影饗에 關한 實驗的 硏究

金宗哲 최신의학사 1974 最新醫學 Vol.17 No.7

For the purpose of studying the effect of tetracycline on mineralization and growth, the rats were given a daily dose of 40mg. /kg. /day and 80mg. /kg. /day of tetracycline during the 8th-15th day of gestation. The effect of tetracycline on young rats delivered from adult rats receiving tetracycline had been assessed mainly through studies of body weight, length of tibia, size of mandible and contents of calcium. The latter was determined by atomic absorption spectrophotometry. The results were drawn as follows. 1. Tetracycline had the inhibitory effects on growth and mineralization in rats. 2. The more dosage of tetracycline had the severer inhibitory effects on growth and mineralization in rats. 3. The inhibitory effect on body weight was observed in group 1 (40mg. /kg. /day) during the 1st week after delivery, in group 2 (80mg. /kg. /day) during the 3rd week after delivery. The highest value of depression rate on body weight was 28.7% in group 2 (80mg. /kg. /day) at the 1st day after delivery. 4. The inhibitory effect on growth rate of tibia was observed in group 1 (40mg. /kg. /day) during the 2nd week after delivery, in group 2 (80mg. /kg. /day) during the 3rd week. after 4elivery. The highest value of depression rate on tibia growth was 36. 2% in group 2 (80mg. /kg. /&a.y) at the 1st day after delivery. 5. The inhibitory effect on growth rate of mandible was observed in group 1 (40mg. /kg. /day) during the 1st week after' delivery, in group 2 (80mg. /kg. /day) during the 3rd week after deiivery. 6. The calcium contents on mandible, tibia, anterior teeth and posterior teeth were incraasel in group 1 (40mg. /kg. /day) during the 1st week after delivery, in group 2 (80mg. /kg. /day) during the 4th week after delivery.

耐蟲性 水稻品種에서 屢代飼育된 벼멸구의 生態型 發達에 관한 硏究

安始榮,정규관,金種喆 東亞大學校生命資源科學大學附設 農業資源硏究所 1993 農業生命資援硏究 Vol.2 No.1

耐蟲性 水稻品種을 加害할 수 있는 새로운 벼멸구(Nilaparvata lugens Stal) 生態型의 人爲的 選拔을 위해 選拔世代別 生存率, 羽化率, 發育期間, 成長指數, 成 의 體重, 攝食量 및 被害度를 調査한바 그 結果는 다음과 같다. 1.三綱벼와 密陽 63號는 生存率이 各各 51.8%, 56.8%로 나타나 耐蟲性反應을 보였으나, 秋晴벼는 97.9%로 높게 나타나 感受性反應을 나타내었다. 2.第1世代에서 三綱벼와 密陽 63號는 낮은 生存率을 보였으나 世代가 進行됨에 따라 漸次 높게 나타나 第11世代에서는 各各 91%, 94%로 感受性品種 秋晴벼의 95%와 거의 같은 生存率을 나타내었다. 3.三綱벼系(生態型-2)와 密陽 63號系(生態型-3)는 各各 三綱벼와 密陽 63號에서 秋晴벼와 같이 羽化率, 成長指數 및 成 의 體重이 높게 나타났으며, 또 若 期間도 짧게 나타났다. 4.filter paper 위에 나타난 甘露排泄面積과 排泄된 甘露의 무게와는 서로 相關이 있었다. 즉 三綱벼系는 三綱벼에서, 密陽 63號系는 密陽 63號에서 甘露排泄面積과 무게가 모두 높게 나타났다. 5.三綱벼系와 密陽 63號系는 各各 三綱벼와 密陽 63號에서 接種 30日, 26日 後에 被害度 9.0을 나타내어 感受性反應을 나타내었다. The present study was designed to obtain detailed information on some of the processes involved in the selection of biotypes of brown planthopper(BPH), Nilaparvata lugens Stal, on the rice cultivars with different major genes for resistance. The BPH population selected for the study has been reared on a susceptible cultivar(Chucheongbyeo) for 10years and initially had a low survival on the resistant rice cultivars, Samgangbyeo(Bph-1 gene) and Milyang 63(bph-2 gene) and high survival on the susceptible cultivar, Chucheongbyeo(no gene). Monitoring the survival and length of the developmental period for eleven generations indicated a progressive increase in the survival and shortening of the nymphal period in each heneration on the resistant cultivars until they were similar to Chucheongbyeo. The feeding amount of the BPH biotype-1 reared for eleven generations on Samgangbyeo or Milyang 63 was as high as Chucheongbyeo with no resistant gene, but biotype-1 reared on susceptible rice cultivar was remarkably lower on Samgangbyeo and Milyang 63 than on Chucheonbgyeo. In addition, the BPH populations selected on Samgangbyeo or Milyang 63 were able to kill Samgangbyeo or Milyang 63 in the 11th generation, respectively. But Samgangbyeo biotype was able to kill Milyang 63 and Milyang 63 biotype ot able to kill Samgangbyeo in the 11th generation.

전치부 반대교합아동의 발음장애에 관한 음향적 연구

박정삼,손동수,이상훈,김진태,한세현,장기택,김종철 大韓小兒齒科學會 1996 大韓小兒齒科學會誌 Vol.23 No.2

It has widely known for speech problem in patients with malocclusion,but there have been insufficient studies on degrees of serverity.Patients with openbite and CIⅢ malocclusion usually have speech problem.It has widly known that fricative /s/ is pronunciated most abnomally in CIⅢ malocclusion than any other consonant.Therefore 20 childen with anterior crossbite selected for control group.7 sounds such as /사(sa),서(sδ),소(so),수(su),스(sω),시(si),세(se)/ were recorded,and the formants and formants ratio were measured by using Sensimetric Speech Station,which is speech analyzing program in IBM pc. The results were as follows: 1.In anterior crossbite group,F1 of all 7 sounds were significantly higher than normal anterior relationship group(P<0.05). 2.There were no significant difference in F2 between two groups except/소(so),수(su)/(P>0.05). 3.In anterior crossbite group,F2/F1 ratio of all 7 sounds were significantly smaller than normal anterior relationship group(P<0.05). 4.There were no significant difference in accordance with tongue position(P>0.05).

Frankel Appliance Type-Ⅲ 사용 전, 후의 안모 연조직 변화에 관한 측모 두부 방사선 계측학적 연구

김민찬,김진태,김종철 大韓小兒齒科學會 1993 大韓小兒齒科學會誌 Vol.20 No.1

The purpose of this study was to evaluate the soft tissue changes following FR-Ⅲ therapy. The sample consisted of 18 males and 15 females. The mean age of pretreatment was 9.0 years in males and 8.3 years in females, and the mean thratment time was 10.8 mos. in males and 12.2 mos. in females. In this study the endex method was adopted to exclude the effect of growth during FR-Ⅲ therapy. The obtained results were as follows: 1.In the linear measurement of male, Apex nasalis, Superior labial sulcus, Labrale superior, Subspinale, and Incision superior moved forward significantly in both actual and index value, Incision inferior, Supramentale, and Pogonion moved backwaud significantly in both actual and index value, and Labrale inferior, Inferio labial sulcus and soft-tissue Pogonion moved backward significantly in index value. 2.In the linear measurement of female, Apex nasalis, Superio labial sulcus, Incision superios moved forward significantly in both actual and index values, Labrale superior, Subspinale in only actual value, and Incision inferior in both value, Labrale inferior, Inferior labial sulcus in only index value moved backward significantly. 3.In the measurement of soft tissue thickness, Superior labial sulcus and Labrale inferior of male increased in both actual and index value. 4.In the angular measurement, upper incisor angle of both sexes increased ingnificantly, facial convexity angle of bothe sexes decreased significantly,, and upper lip angle of male increased significantly. 5.In the measurement of differnces between hard and soft tissue changes, there were significant differences in between Subspinale: Superior labial sulcus, Incision superior: Labrale superior, Incision inferio:Labrale inferio of male and Subspinale:Superior labial sulcus of female in both actual and index value, and Incision superior: Labrale superior of femlle in only index value. There was significant difference between upper incisor angle change and upper lip angle change.

Ⅲ급 부정교합 아동의 교정 치료시 저작근의 근전도 POWER SPECTRUM 변화에 관한 연구

김형두,김진태,김종철 大韓小兒齒科學會 1992 大韓小兒齒科學會誌 Vol.19 No.1

The purpose of this study is to evaluate the changes in the electromyographic power spectrum of the masticatory muscles before and after treatment of the class Ⅲ malocclusion children. Twenty one children with class Ⅲ malocclusion, seventeen children with mormal occlasion, and thirteen children who received orthodontic treatment were included in this study. Class Ⅲ malocclusion children were treated with Frankel appliances. The myoeletric signals from the masseter and anterior temporal muscles were recorded for thirty seconds in 80% level of maximum voluntary contraction using computer-aided EMG system. The power spectral analyses were done with computer and the following results were obtained : 1. In all subjects the median frequency of the electromyographic power spectrum of both muscles showed shift to lower frequency range as isometric contraction was sustained(P<0.001). 2. The slope of median frequency in normal occlusion children was a little higher than that in class Ⅲ malocclusion children, but did not show any significant difference statistically. 3. After treatment the slope of median frequency increased slightly, but did not show any significant difference statistically. 4. After treatment the median frequency of the 1st block dropped significantly in both muscles, and the temporal muscle showed greater drop than the masseter muscle(masseter muscle:P<0.05, temporal muscle:P<0.001). 5. After treatment the median frequency of the 30th block dropped significantly in both muscles, and the temporal muscle showed greater drop than the masseter muscle(masseter muscle:P<0.05, temporal muscle:P<0.001) 6. After treatment the mean value of the median frequencies for thirty seconds dropped significantly in both muscles, and the temporal muscle showed greater drop than the masseter muscle(masseter muscle:P<0.01, temporal muscle :P<0.001).

Dril 加工時 drill 磨耗 및 切削力에 關한 硏究

金鍾喆 忠州大學校 1987 한국교통대학교 논문집 Vol.20 No.2

This paper is a study of drill wear and cutting force in cutting working working using drill. First, I measured cutting resistances according to varing the depth of cut. The result shows that there is more variation in torque than in thrust as the depth of cut increases. Second, in the relation between feed speed and cutting force there is more thrust increased than torque increased. Third, in the relation between depth of cut and tool wear the shorter is the drill dismeter, the more remarkably increases web wear.

C.N.C. 旋盤에서 工具磨耗와 切削性에 關한 硏究

金鐘喆 忠州大學校 1985 한국교통대학교 논문집 Vol.18 No.2

In this paper, I considered a state of tool wear and the creation of chip in C. N. C Lathe. Results of this paper are as follows : 1. Cratering wear and flank wear are proprtioned to feed speed and depth of cut. Therefore, They are coming to into an exponent function. 2. Flank wear is greater than crater wear from relation of depth of cut and feed speed. 3. When I considered the creation course of chip from relation of feed speed f and depth of cut d, the most idial chip obtain at 0.15 section.

緞造素材 切削에서 切削工具의 摩耗 및 表面組度에 關하여

金鍾喆 충주대학교 1979 한국교통대학교 논문집 Vol.12 No.2

I am going to study the surface roughness and the tool life arising from the working condion for the design of machine tool with the superior quality of cutting working. I used st 10P. st 20E and st 30E producing from koryoy an the tools, and measured crater wear and flark wear arising from the changes of cutting speed and cutting time. In result, I found that st 10P was the best cutting tool.

敎權伸長

金鍾喆 원광대학교 교육대학원 1985 교사와교육 Vol.2 No.-

난소 과립막 세포 종양의 방사선학적 소견

김종철 충남대학교 의과대학 지역사회의학연구소 1997 충남의대잡지 Vol.24 No.1

Ovarian granulosa cell tumor (GCT) is one of the hormone-secreting sex cord stromal tumors and comprises approximately 2-3% of all ovarian tumors. Retrospective analysis of radiologic findings (ultrasonography, computed tomography, and magnetic resonance imaging, etc.) of pathologically proven eleven ovarian GCTs in ten patients was done for the orgin site, staging, largest diameter, margin, solid (enhancement degree) and/or cystic components, and associated endometrial hyperplasia, ascites, local and/or distant metastases. The purpose of this study was to evaluate whether there were any specific radiologic findings of these tumors. Nine patients had unilateral GCTs, and one patient had bilateral ovarian GCTs. Of total eleven GCTs, eight were of adult type and three were of juvenile thpe. the largest diameters of GCTs ranged form 1 to 26 cm (mean, 15.5 cm), Eight tumors were well-defined. One small tumor was solid, and two tumors were cystic (multilocular or unilocular). Eight tumors were mixed ones of both soft tissue componets and some cystic components: of these tumors, two tumors had hemorrhagic and necrotic portions, and four had multilocular of bilocular cystic portions. Metastatic nodules in the liver, invasion to uterus or rectum, omental or pelvic lymphadenopathy were observed in four patients. Ascites was found in six patient. Endometrial hyperplasia was associated with GCTs in two patients. Ovarian GCTs had radiologic findings of well-defined encapsulated soft tissue masses with some hemorrhagic, multiloucular cystic, or vocal cystic components, in association with endometrial thickening, ascites, and local and/or distant metastasis. These findings, in combination with clinical ones, may be useful to diagnose and follow ovarian GCTs.