Spawning Behavior, Egg Development, Larvae and Juvenile Morphology of Hyphessobrycon eques (Pisces: Characidae) Characidae Fishes

Jae-Min Park,Na-Ri Kim,Kyeong-Ho Han3,Ji-Hyeong Han,Maeng-Hyun Son,Jae-Kwon Cho 한국발생생물학회 2014 발생과 생식 Vol.18 No.4

Hyphessobrycon eques is a famous fish for ornamental fish market and aquarium. They are inhabit in regions of Amazon and Paraguay River basin. Serpae fishs were investigated 2–3 males are chased to female, and then males attempted to simulate the females abdomen. After fertilization, eggs were kept in incubators at 28oC. The fertilized eggs had adhesive and demesal characteristics and had a mean diameter of 0.92 ± 0.01 mm. Larvae hatched at 16 hrs post fertilization. The hatched larvae averaged 2.90 ± 0.16 mm in total length (LT). Complete yolk sac resorption and mouth opening occurred on the third day post hatching. At 45 days post hatching, the larvae were 12.5 ± 1.60 mm LT and had reached the juvenile stage.

3관능성 BPA-3MA를 기질로한 광중합형 치면열구전색재의 물성 연구

박경준,김경남,안광덕,김광만,한동근,전호욱 대한치과기재학회 1998 대한치과재료학회지 Vol.25 No.2

The BPA-3MA(bisphenol-A trimethacrylate) in which one of two hydroxy group was substituted by methacrylate was synthesized by reaction of Bis-GMA with methacryloyl chloride. To investigate the possibility to apply BPA-3MA as matrix of composite resin or pit and fissure sealant, BPA-3MA(3MA) or Bis-GMA(GMA) as matrix, TEGDMA as diluent, CQ as photosensitizer, EDMAB as photoinitiator and 5㎛ pyrogenic silica as filler were used for making experimental sealants. In addition, these experimental sealants were compared to a commercial Concise L/C White sealant(CLW, 3M Co, U.S.A.) for flexural strength, diametral tensile strength, amount of abrasion, surface hardness, water sorption and solubility, and degree of conversion. The flexural strength of CLW was the highest value but there was not significant difference with 3MA. Diametral tensile strength of all 3 groups were similar(p>0.05) and the amounts of abrasion of 3MA and GMA were less than that of CLW(p<0.05). The surface hardness of 3MA was higher than that of GMA(p<0.05) but similar to that of CLW. The water sorption of 3MA was less than that of GMA and CLW(p<0.05) and the solubilities of 3MA and CLW were than that of GMA(p<0.05). GMA and CLW were relatively polymerized well as compared to 3MA. From these results, pit and fissure sealant using trifunctional BPA-3MA as matrix had superior physical and mechanical properties to existing Bis-GMA sealant. Furthermore, it will be possible to develop composite resin having superior properties to existing composite resin.

흰쥐와 햄스터 연수에서의 Phenylethanolamine N-methyltransferase 활성 및 분포에 관한 면역조직화학적 비교 연구

박경한 보건장학회 1989 보건장학회보연구논문집 Vol.11 No.-

분무열분해법에 의한 MgO 및 NiO첨가 Al₂o₃분체로 제조한 소결체에서의 Spinel확인

박정현,김한태,조경식 연세대학교 산업기술연구소 1991 논문집 Vol.23 No.2

Powders prepared by spray pyrolysis method are expected to have the compositional homogeneity and homogeneous distribution of additives. Pure MgO doped and NiO doped Al₂O₃ powders were synthesized by spray pyrolysis method at 1000℃. Sintered specimens were prepared by firing at 1600, 1650 and 1700℃ for 2 hrs. with their calcined powders of 1100℃ for 1 hr. The microstructure of pure Al₂O₃ sintered specimen showed large grains and grain-boundary pores, and its ralative density was about 91% even thought it was fired at 1700℃, 2hrs. 0.25 wt% MgO or 0.3 wt% NiO doped Al₂O₃ prevented discontinuous grain growth and eliminated residual pores, and allowded the specimen to densify to near a theoretical density. More MgO or NiO doping into Al₂O₃ impeded the grain growth and included many pores. According to SAD (selected area diffraction) and EDS analysis of sintered Al₂O₃bodies doped with 0.25, 5.0 wt% MgO and 0.3, 0.5 wt% NiO, the second phase Mg-Al spinel particles and Ni-Al spinel particles were observed at grain boundary and inside Al₂O₃ grains.

경추손상이 의심되는 환자에서 경추전방 연부조직 폭 측정의 의의

박주경,김성근,윤한덕,허탁,조석주,민용일 대한응급의학회 1995 대한응급의학회지 Vol.6 No.2

Prevertebral soft tissue swelling of cervical spine lateral radiogram is well known as an indirect evidence of occult cervical spine injury. But the clinical and statistical value of it has been of debate. We tried to analyse the value of cervical prevertebral soft tissue width as a screening test for cervical spine injury by comparison of two categorized study groups; the control group, traumatized patients without cervical spine injury and the injury and the injury group, traumatized patients with bony cervical injury. The injury group consisted of patients admitted between September 1993 and December 1994 with an ED diagnosis of bony cervical injury. The control group consisted of patients admitted between January 1994 and June 1994 who received cervical spine lateral radiograph because of suspicion of cervical spine injury or as a routine check. In both group, we sampled the patients who received cervical spine lateral rediograph within 24 hours after injury and excluded the patients less than 15 years old and more than 65 years old, In the control group, we confirmed the patients had no problem in cervical spine of follow-up. 101 control patients and 68 injury patients were identified. The injury group was further divided into two subgroups: those with injuries at C1-C3 to the upper injury subgroup and those with injuries at C4-C7 to the lower injury sub group. The prevertebral soft tissue widths of injury group were larger than of control group at C2(mean 6.1mm versus 4.5mm) and also at C6(mean 13.4mm versus 11.2mm). Especially upper injury subgroup had quite large value of C2 prevertebral soft tissue width(mean 14.1mm). Nevertheless, both in C2 and C6, there is no cutoff value with acceptable sensitivity and specificity as a screening test. But the 7mm at C2 and 14mm at C6 had high specificity(90%) and were thought to be a good radiologic indicators of further evaluation.

전위된 소아 상완골 과상부 골절의 치료 : 도수정복 되지 않는 골절의 최소 절개를 통한 정복술 Open Reduction with Minimal Incision of the Manually Irreducible Fracture

한경진,어수익,박응석,강신영 대한골절학회 2002 대한골절학회지 Vol.15 No.4

목 적 : 전위된 소아 상완골 과상부 골절의 치료에서 도수 정복 후 석고 고정술 또는 경피적 K-강선 고정술을 시행하거나 도수 정복이 되지 않은 경우 최소 피부절개를 통한 관혈적 정복 및 경피적 K-강선 고정술을 시행한 결과를 분석하고자 하였다. 대상 및 방법 : 전위된 상완골 과상부 골절(Gartland 제 Ⅱ, Ⅲ형)로 치료한 8세 이하의 환아중 1년 이상 추시가 되었던 총 74명 (74 골절) 을 대상으로 하였다. Gartland분류에 의한 제 Ⅱ형이 19차례, 제Ⅲ형이 52차례 이었고 정복의 기준은 건측의 주관절 Bauman 각으로 하였다. 안정적인Gartland 제 Ⅱ형, 6례에서 석고 고정을 시행하였고 불안정한 Gartland 제 Ⅱ형 13례와 Gartland 제Ⅲ형 52 례는 경피적 K-강선 고정술을 시행하였다. 도수 정복이 되지 않은 20례 (제 Ⅱ 형 1례, 제 Ⅲ 형 19례)의 경우, mini C-arm 영상하에 주관절 후면에 최소절개를 가하고 소절골도를 이용하여 정복하였다. 결과의 분석에는 주관절 운반각과 기능적인 운동범위의 소실 정도에 따른 Flynn의 분류를 사용하였다. 결과 : 저자들의 결과를Flynn의 분류에 따라 분석하면, 운반각의 경우 excellent는 52 례 (73.2%). good은 13례(18.3%) 로 만족할 만한 결과는 91.5% 이고 운동 범위의 경우 excellent는 49례 (69.0%), good은 20례(28.2%) 로 만족할 만한 결과는 97.2% 로서 비슷한 결과를 보였다. 도수 정복 및 경피적 K-강선 고정술이 운동 범위 요소(Functional factor)에서 더 많은 excellent, 그리고 최소 절개를 이용한 관혈적 정복 및 경피적 K-강선 고정술은 운반각 요소(Cosmetic factor)에서 더 많은 excellent를 나타내었다. 결 론 : 소아의 상완골 과상부 골절의 치료는 소아 골단의 성장판의 손상과 향후 발생할 수 있는 각변형을 고려하여 되도록 정확하고 세심한 정복과 안정적인 고정을 요한다. 또한, 도수 정복이 불가능할 경우 무리한 도수 정복 조작을 계속하지 말고 관혈적 정복을 시행하며 연부조직 손상을 줄이기 위해 가능한 최소 절개를 통한 정복 및 경피적 K-강선 고정을 하는 것이 좋은 결과를 나타내는 것으로 생각된다. Purpose : We evaluated the results of the displaced supracondylar fractures in children treated by closed reduction and cast immobilization, closed reduction and crossed K-wires fixation. Materials and Method : We retrospectively reviewed the results after 1 years of the treatment of 71 extension-type fractures (Gartland type Ⅱ-19 cases, type Ⅲ-52 cases) of supracondylar humeral fractures in children under age of 8 years. Closed reduction was impossible in 20 cases (1 type Ⅱ, 19 type Ⅲ) and we performed open reduction with minimal incision and cross percutaneous pinning. We measured Baumanns angle and range of motion of elbow and evaluated the results by Flynns criteria. Result : By Flynns criteria, 91.5 % of satisfactory (excellent, good) resuts in cosmetic factor and 97.2 % in more excellent in functional factor and that of the minimal open reduction and percutaneous pinning in cosmetic factor but over all satisfactory results were similar. Conclusion : The treatment of the displaced supracondylar humeral fractures in children need accurate and delicate reduction and firm fixation to prevent deformity and to preserve function of the elbow. Open reduction with minimal incision instead of general incision for the manually irreducible supracondylar humeral fracture would be a reliable and convenient method for the treatment of supracondylar humeral fractures in children.

점농어(Lateorabrax sp.)의 종묘생산에 관한연구 1. 稚魚期에 있어서 成長과 生存에 미치는 염분의 영향

박준택,한경호 麗水大學校 産業基術硏究所 1999 産業基術硏究所 論文集 Vol.8 No.-

점농어 稚魚(孵化後 150일째)의 염분 농도별 실험구(A : 30‰, B : 20‰, C : 10‰, D : 0‰)에서의 성장율과 생존율은 다음과 같다. 부화 150일루 稚魚들을 각각의 염분 농도에 수용하였을 때 수용 수 50일째까지는 고염분에서 성장이 다소 빨랐으나, 수용 후 60일째 부터는 담수와 저염분의 실험구에서 성장이 매우 양호하였다. 각 염분별 사육일수 (X)에 따른 전장(Y)과의 회귀직선식은 다음과 같다. 30‰ 실험구 : Y = 20.26X + 57.20 (r=0.9799), 20‰ 실험구 : Y = 19.74X + 57.82 (r=0.9825), 10‰ 실험구 : Y = 20.80X + 56.34 (r=0.9823), 담수(0‰) 실험구 : Y = 21.43X + 54.71 (r=0.9845). 염분 농도를 달리하여 사육하였을 때 生存率은 수용 초기에는 담수 실험구에서 生存率이 떨어졌으나, 수용 후 50일째부터는 오히려 담수 실험구에서 生存率이 높았으며, 수용 후 90일째부터는 生存率이 86.0∼91.0%로 실험구별로 큰 차이는 없는 것으로 나타났다. 각 실험구간의 기울기에 유의성 검정결과 담수(0‰) 실험구와 10‰, 20‰실험구 및 30‰실험구 사이에는 유의한 차이가 있었다. This study was conducted to compare the growth and survival rates of spotted sea bass, Lateorabrax sp., juveniles in different salinities (0‰, 10‰, 20‰, 30‰). The growth rate of sea bass juveniles were not observed significant difference in all test group until 50 days after rearing. After that, However rate of sea bass juveniles in low salinity was higher than the high salinity. The relationship between the days of rearing (X) and the total length (Y) of the fingerlings were as follows : 30‰ treatment group : Y = 20.26X + 57.20 (r=0.9799), 20‰ treatment group : Y = 19.74X + 57.82 (r=0.9825), 10‰ treatment group : Y = 20.80X + 56.34 (r=0.9823), 0‰ treatment group : Y = 21.43X + 54.71 (r=0.9845). The slopes of regression line estimated from 0‰, 10‰ and 20‰groups were significantly different from that of 30‰ group. Survival rate of sea bass juveniles was fall down slightly at low salinitly () until 50 days after rearing. But significant difference of survival rate was observed in all test group from 90 day after rearing to the end of experimental period.

무수치 표백시술시 치경부를 통한 표백제 누출량의 정량적 측정

박수경,이정식,최한석 大韓齒科保存學會 1996 Restorative Dentistry & Endodontics Vol.21 No.1

가로변 건물 외장 재료의 구성과 이미지에 관한 연구 : 전주시를 중심으로

한상수,남해경,박한규 대한건축학회 2004 대한건축학회논문집 Vol.20 No.12

This study aims to find out the composition of the architectural materials for the exterior design of the urban buildings and their facade Image. To carry out this study, the field survey for the buildings of the 5 main streets in Chonju area was done And each one of the exterior building materials of the selected 15 buildings were investigated by a specialist group and non-specialist group They were analyzed as their built age, function, story and materials and their image It is concluded as followings 1 The tiles are mostly used as the building facade materials 2 As the built age, the tiles are chiefly used in the buildings that were built from 1970 to 1980, the granite and glass are more widely used in the recent buildings 3 As the function, the tiles are largely used in the kinds of daily life buildings and hospital buildings, and the glasses are in the office buildings 4 As the building story, the tiles are generally used In the lower story buildings, however in the middle story buildings granite and glasses are generally used. And in the higher story buildings, the glass is mostly used The compositional proportion of the buildings, as its used materials, are 70%, 23% and 7% respectively It is shown that the image of cool and modernness is taken with the buildings of glass, steel, timber and aluminum made And the buildings of red brick, tile, dry-bite and concrete have their own Images of warm together with the images of physical properties In the process of architectural design, the design of its exterior materials will be applied as its physical properties and images

소화관내 이물에 대한 고찰

윤한덕,류진호,박주경,허탁,조석주,김성근,민용일 大韓應急醫學會 1997 대한응급의학회지 Vol.8 No.1

We analyzed records at Chonnam university hospital from Sep. 1. 1993 to Aug. 31. 1996 to assess clinical significance of the foreign body in the gastrointestinal tract. There were 133 episodes consisting of 79 pediatric and 54 adult patients as possible to review. In the pediatric patients, the coin was the most common cause of foreign body ingestion, while adult patients were usually caused by bones and meat. We removed foreign bodies in the oral cavity and oropharynx in 12 cases using direct laryngopharyngoscpy and forcep. Endoscopy was performed successfully in 47 of 51 patients in which was attempted; there were two complications composed of an aspiration pneumonia and a mediastinitis due to esophageal perforation. There were spontaneous passage of foreign bodies in 48 cases. We observed complications in 6 cases in which 4 cases needed operations due to complications. Foreign bodies which pass into the stomach can be observed for development of complications, as 94% of foreign bodies which reach the stomach spontaneously pass. Only 4 patients required interventions, which was done without mortality.