A Basic Study on Leaf and Stem Production of Angelica acutiloba

Choi,Seong-Kyu,Yun,Kyeong-won,Chon,Sang-Uk,Lee,Jong-Ill,Seo,Young-Nam,Seo,Kyoung-Sun,Choi,Kyeong-Ju 한국자원식물학회 2004 Plant Resources Vol.7 No.3

This study was conducted to develop effective production system in greenhouse for leaves and stems of Angelica acutiloba by using connect pots in 2003 and 2004. Seed germination rate and plant biomass of Angelica acutiloba collected in 2004 were higher than those harvested in 2003. Germination rate of Angelica acutiloba seeds collected in 2003 was 10%, while germination rate of seeds collected in 2004 was above 90%. Especially, plant growth and yield of Angelica acutiloba grown in connect pots sized with 4×4×5cm(length×width×height) were the highest. These results indicate that leaf and stem production of Angelica acutiloba can be improved by using connect pots and optimizing seed collecting time in greenhouse.

Air Rotor Stripping with Essix Anterior Anchor를 이용한 교정치료

최남기,김숙의,양규호 大韓小兒齒科學會 1999 大韓小兒齒科學會誌 Vol.26 No.1

Air turbine handpiece를 사용하여 치간 법량질을 삭제하는 Air-rotor stripping 술식은 악궁확장이나 발치 술식에 대한 대체방안으로써 arch length discrepancy를 해결할 수 있는 효과적인 접근법으로 시료된다. Conventional interproximal stripping using abrasive strips is normally limited to the anterior teeth. The strips must be forced between the contact points of the teeth creating patient discomfort and the risk of cutting gingival tissue. Air-rotor stripping (ARS) with Essix anterior anchor enables the clinician to remove a precise amount of interproximal enamel to create space, primarily in the buccal quadrants, for aligning or retracting teeth. In selected cases, ARS can resolve significant differences in ratios of tooth size to arch length, and the technique can become an alternative to extraction or expansion. ARS can create substantially more space than that is usually obtained by conventional interproximal stripping, and it can be done at any time during treatment without discomfort to the patient and without adversely affecting the function of the dentition, interocclusal relations, or tooth form.

Study on Leaf Production of Angelica acutiloba by Mulching with Polyethylene Film

Choi,Seong-Kyu,Yun,Kyeong-Won,Chon,Sang-Uk,Seo,Young-Nam,Seo,Kyoung-sun,Kwon,Byung-Sun 한국자원식물학회 2003 Plant Resources Vol.6 No.3

This study was conducted to produce effectively more leaves of Angelica acutiloba through year-round production system by using various mulching materials and polyethylene(PE) tunnel. Soil temperature by covering treatment was higher in PE mulching and PE tunnel than in rice straw mulching, especially showing the highest temperature in PE tunnel from April through May. Water content of soil was higher in PE mulching than in non-mulching. Leaf production of Angelica acutiloba through year-round production showed the highest in PE tunnel and root production in PE mulching. These results suggest that leaf production of Angelica acutiloba can be maximized through PE tunnel cultivation system.

이유백서에서 교근절제후 하악과두의 면역조직화학적 연구

최남기,양규호 전남대학교 치과대학 1995 전남치대논문집 Vol.7 No.1

The purpose of this study was to determine whether there was any correlation between temporomandibular joint dysfunction and structure of the mandibular condyle. Weanling rats had their masseter muscles resected and immunohistochemical findings were observed a light microscope. The results obtained were as follows : 1. The condylar cartilage region was divided into articular, proliferating, cartilage cell and hypertrophic cell layers according to cell morphology. 2. In light microscopic views, the proliferating and cartilage cell layers of the experimental group decreased gradually and at the 8the week significantly. 3. In immunohistochemical staining for type Ⅰ and Ⅱ collagen, a reaction was detected in the lower part of proliferating cell and cartilage cell layers. In the acrtilage cell layers, a stronger cellular reaction was present. Immunohistochemical staining for type Ⅱ collagen reacted more strongly than that of type Ⅰ collagen. 4. In immunohistochemical staining for proteoglycan, the staining of the experimental group resembled the control group and gradually showed a weak reaction. The proliferating and cartilage cell layers reacted more strongly than the hypertrophic cell layer. 5. In immunohistochemical staining for proliferating cell nuclear antigen(PCNA), the strong reaction was detected in the nucleus of the proliferating cell layer both in control and experimental groups. But the thickness of the proliferating layer decreased in experimental group, consequently the reaction of the experimental group was reduced more than that of the control group.

4세 유아에 발생한 몰입성 하마종(plunging ranula); 증례보고

최진호,양동환,김일규,오남식 대한악안면성형재건외과학회 2001 Maxillofacial Plastic Reconstructive Surgery Vol.23 No.4

Whereas oral ranula is relatively common and presents as a cyst in the mouth, the plunging ranula is rare and manifests itself as a mass in the neck with or without an associated oral lesion. When there is a soft anterior neck swelling without oral swelling, diagnosis is still difficult. In such a case, clinical suspicion may be low and the pathologist may be misled by the histologic appearance. Recognition of the diagnosis of plunging ranula is essential for the correct treatment of these lesions We report a case of a 4-year-old girl and review the literatures to discuss the differential diagnosis and treatment modalities.

1980~1990년대 기능인력 부족 및 양성정책의 성격

최규남,노태천 충남대학교 공업교육연구소 1999 論文集 Vol.22 No.1

The major purpose of this study is to investigate the characteristic of skilled worker deficiency and training policy from a manpower supply point of view. To achieve the purpose of study wrote out research problems as follows: First in which section did deficiency situations of skilled worker bring about before and after 1990 ? And what was the basic cause of them? Second, did an avoidance tendency of skilled occupation that was generated mainly at manufacturing industry bring about by any factors before and after 1990 ? How was the characteristic of it? Third, were what relations between the governmental training policy of skilled worker and the characteristic of skilled worker deficiency? The major conclusions of this study were as follows : 1) The basic cause of deficiency situation of skilled worker came from pool diminution of 15 year old men - 24 year old men. The deficiency of skilled worker was largely generated at a labor intensive industry of low wages and at a smaller business rather than a large enterprise. And in skill levels high-skilled worker lacked so much. These large deficiency of high-skill worker couldn't be solved as just a huge quantity training of a low-skilled worker : the policy that enlarge school such as an industrial high school, a training center etc. 2) An avoidance tendency of skill occupation was mostly generated by a wage disparity, an uncleanness of working environment, an anxiety of the future in their job etc. In the most of them, the wage disparity was the most significant factor. Also an social avoidance tendency of 3D job was one of the main factors. 3) The governmental policy to solve the deficiency situation of skilled worker was the way that enlarge low-skilled worker : increase student of industrial high school and training center. But these policy was the type that followed 1970s's method, moreover was the plan that overlooked 1990s's social·economical variation that a structure of industry and a need of labor supplier was variously changing. Accordingly, the governmental policy couldn't be actualized as the original supply plan until now. In conclusion, to accomplish the object of training policy and to solve the situations of skilled worker deficiency, the training method of skilled worker should be change into qualitative education which can reflect on student's need and today's uniformly quantitative education should be reformed in the future.

백서의 원위부 피편에 동맥유입의 중요성에 관한 실험적 연구

최규남,최희윤,강희문,김한중 大韓成形外科學會 1983 Archives of Plastic Surgery Vol.10 No.2

Microsurgery and myocutaneous flap have been developed recently for wide employment in plastic and reconstructive surgery. Therefore, the delay procedure has been declined in its use recently, because it has many difficult problems. If the flap is longer and larger, it should be delayed for complete survival, but delay requires considerable time. Therefore, as a substitute for delay, vascular anastomosis in the distal part of a flap will theoretically give the same effect. In this study, we investigated the importance of arterial inflow in the distal side of a flap in rats. The experiment was done in 3 different groups according to the design of flaps and in each group 3 subgroups were made. In A flap, the superficial epigastric artery was preserved or anastomosis. In V flap. the superficial epigastric vein was preserved or anastomosis. In C flap, as a control flap, both artery and vein were severed. In result, A flaps in all 3 groups were completely survived. Both V and C flaps in all 3 groups were showed distal necrosis. But C flaps were showed more necrosis than V flaps. In conclusion, we suggest the possibility that a large flap may be transposed in one stage with vascular anastomosis in the distal part-preferably artery and vein, or artery only.

유치와 영구치에서 치과용 접착제의 전단결합강도

최진영,최남기,박영준,최충호,양규호 大韓小兒齒科學會 2007 大韓小兒齒科學會誌 Vol.34 No.4

The objective of this study was to compare the shear bond strengths of five adhesive systems to the enamel and dentin of primary and permanent teeth. Fifty noncarious primary and fifty permanent teeth were collected and stored in an 0.1% thymol solution at room temperature after extraction. The tested adhesives were: Adper Scotchbond Multi-purpose Plus Adhesive (SM) Adper Single bond 2 (SB), Clearfil SE Bond (SE), Adper Prompt L-Pop (PL), G-Bond (GB). For the shear bonding test, the labial and lingual surfaces of primary and permanent teeth were used. To obtain a flat surface, the labial and lingual surfaces of the teeth were sanded on SiO₂with number 600 grit and then divided into 20 groups of 10 surfaces each. All samples were theromocycled in water 5℃ and 55℃ for 1000 cycles. The results were as follows: 1. For primary enamel, shear bond strengths of SM and SB were significantly higher than that of SE and also SM, SB, and PL were higher than GB(p<0.05). 2. For primary dentin, there were no significant differences among the shear bond strengths of any other bonding systems except differnece between SE and GB. 3. For permanent enamel, SB showed significantly higher mean shear bond strength than those of any other bonding systems(p<0.05). 4. For permanent dentin, SM showed significantly higher mean shear bond strength than that of PL and GB(p<0.05). 5. Between the primary enamel and dentin, there were significant differences in SM, SB, and GB, whereas there was statistically significant difference in PL between the permanent enamel and dentin(p<0.05). 6. Between the primary and permanent teeth on enamel, there were no significant differences among all bonding systems, whereas there were statistically significant differences in SM and SB between the primary and permanent teeth on dentin(p<0.05). 본 연구에서는 최근에 개발된 치과용 접착제를 대상으로 유치와 영구치의 법랑질과 상아질에 대한 결합력을 비교 평가하여 입상에서 상아질 접착제를 적절하게 선택하는데 도움을 주고자 시행하였다. 실험재료로 Adper Scotchbond Multi-purpose Plus Adhesive (SM; 3M ESPE,USA),Adper Single bond 2 (SB; 3M ESPE,USA),Clearfil SE Bond (SE; Kuraray Medical Inc.,Japan),Adper Prompt L-Pop (PL; 3M ESPE,USA),G-Bond (GB:GC Cooperation Toyko,Japan)를 이용하여 전단결합강도를 평가하여 다음과 같은 결과를 얻었다. 1. 유치 법랑질에서 전단결합강도는 SM이 28.47±7.93 MPa로 가장 높았고 SB (28.18±6.84),PL (24.02± 6.14),SE (21.70±6.56),GB (17.70±6.68) 순이었다. SM과 SB는 SE보다 통계적으로 유의하게 높은 결합 강도를 보였으며,SM,SB,PL은 GB보다 높았다(p<0.05). 2. 유치 상아질에서 전단결합강도는 SE가 28.72±14.44MPa로 가장 높았고,PL (20.10±6.13),SM 07.72± 10.65),SB (15.48±2.66),GB (10.10±5.45) 순이었으며 SE와 GB간 에는 유의한 차이가 있었으나,다른 군 들 간에는 유의한 차이가 없었다. 3. 영구치 법랑질에서의 전단결합강도는 SB가 28.36±5.68 MPa로 가장 높았고 SM (22.77±4.63), PL(22.05 士6.57),SE (21.74±4.62),GB (15.60±6.75)순이었다. SB는 다른 접착제보다 통계적으로 유의하게 높은 결합력을 나타냈으며,GB는 가장 낮은 결합력을 보였다(p(0.05). 4. 영구치 상아질에서의 전단결합강도는 SM이 28.22±5.56 MPa로 가장 높았고,SB (21.68±7.44),SE (20.13 ±9.88),GB (14.30±6.81),PL (14.18±5.88)순이었으며,SM은 PL,GB와 유의한 차이가 있었다(p<0.05). 5. 유치의 법랑질과 상아질 간에는 SM,SB,GB에서 유의한 차이가 있었고,영구치 법랑질과 상아질 간에는 PL에서 유의한 차이가 있었다(p<0.05). 6. 유치 법랑질과 영구치 법랑질 간에는 모든 접착제에서 유의한 차이가 없었으나,유치 상아질과 영구치 상아질 간에는 SM과 SB에서 유의한 차이가 있었다(p<0.05).

하악골 성장 지표로서 경추골 성숙도의 유용성

최봉선,최남기,김선미,양규호,정성수 大韓小兒齒科學會 2007 大韓小兒齒科學會誌 Vol.34 No.4

This study was to investigate if cervical vertebrae maturation stages are as useful as hand-wrist maturation stages in evaluating the mandibular growth. The subject consisted of 292 girls aged from 8 to 16 years with normal occlusion. They were classified according to diagnosis by using studycast. lateral cephalogram, and handwrist X-ray film. The results were as follow: 1. Cervical vertebrae and hand-wrist maturation stages increased with age. 2. All mandibular measurements (Ar-Go, Go-Me, N-Go, S-Gn, N-Me) increased linearly with cervical vertebrae maturation stages. 3. Ar-Go, Go-Me, N-Go, S-Gn increased linearly with hand-wrist maturation stages. 4. Ar-Go, Go-Me, N-Go, S-Gn increased relatively rapidly between cervical vertebrae maturation stages 3 and 4. Go-Me and S-Gn increased relatively rapidly between hand-wrist maturation stages 6 and 7. 5. Ar-Go, Go-Me, N-Go, S-Gn, N-Me had high correlations with cervical vertebrae maturation stages as well as hand-wrist maturation stages. These results suggest that cervical vertebrae maturation stages are reliable on evaluating the mandibular growth. 하악골 성장을 평가하는 데 경추골 성숙도가 수완부골 성숙도만큼 유용한가 규명하고자 본 연구를 시행하였다. 정상교합을 가진 만 8세∼만 16세 여성 292명을 연구대상으로 하여 진단석고모형,측모두부규격방사선사진,그리고 수완부방사선사진을 이용하여 경추 및 수완부의 골성숙도를 비교하여 다음과 같은 결과를 얻었다. 1. 연령 증가에 따라 경추 및 수완부의 골성숙도가 일정하게 증가하였다. 2. 경추골 성숙도가 증가할수록 Ar-Go,Go-Me,N-Go,S-Gn,N-Me이 일정하게 증가하였다. 3. 수완부골 성숙도가 증가할수록 Ar-Go,Go-Me,N-Go,S-Gn이 일정하게 증가 하였다. 4. 경추골 성숙도 3단계와 4단계 사이에서 Ar-Go,Go-Me,N-Go,S-Gn이 크게 증가하였고,수완부골 성숙도 6단계와 7단계 사이에서 Go-Me,S-Gn이 크게 증가 하였다. 5. Ar-Go,Go-Me,N→Go,S一Gn,N-Me은 경추 및 수완부 골성숙도와 각각 유의 한 상관성을 보였다. 이상의 결과는 하악골 성장을 평가하는 데에 경추골 성숙도가 수완부골 성숙도처럼 유용하게 사용될 수 있음을 시사한다.

이유백서에서 교근절제후 하악과두의 면역조직화학적 연구

최남기,양규호,최홍란 大韓小兒齒科學會 1996 大韓小兒齒科學會誌 Vol.23 No.2

The purpose of this study was to determine whether there was any correlation between temporomandibular joint dysfunction and structure of the mandibular condyle. Weanling rats had their masseter muscles resected and immunohstochemical findings were observed with a light microscope. The results obtained were as follows: 1.The condylar cartilage region was divided into articular,proliferating,cartilage cell and hypertrophic cell layers according to cell morphology. 2.In light microscopic views,the proliferating and cartilage cell layers of the experimental group decreased gradually and at the 8th week significantly. 3.In immunohistochemical staining for type Ⅰand Ⅱ collagen,a reaction was detected in the lower part of proliferating cell and cartilage cell layers.In the cartilage cell layers,a stronger cellular reaction was present.Immunohistochemical staining for type Ⅱ collagen reacted more strongly than that Ⅰ collagen. 4.In immunohistochemical staining for proteoglycan,the staining of the experimental group resembled the control group and gradually showed a weak reaction.The proliferating and cartilage cell layers reacted more strongly then hypertrophic cell layer. 5.In immunohistochemical staining for proliferating cell nuclear antigen(PCNA),the strong reaction was detected in the nucleus of the proliferating cell layer both in control and experimental groups.But the thickness of the proliferating layer decreased in experimental group,consequently the reaction of the experimental group was reduced more than that of the control group.