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RISS 인기검색어
- 검색키워드
- 저자 : 崔泰燁 (검색결과 5 건)
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崔泰燁,金春泳 전북대학교 공업기술연구소 1988 工學硏究 Vol.19 No.-
The experiment is carride out in a 10㎝ diameter. cocurrent continuous bubble column. The axial mixing characteristics is studied by measuring an axial dispersion coefficient using a dispersion model. The superficial gas velocity is varied from 0.5-3.5㎝/s, the superficial liquid velocity from 0.5-1.0㎝/s. axial dispersion coefficients of loquid phase are increased with ad increase in gas flow rate, and liquid flow rate. Dispersion coefficients of liquid phase is explained using the modified isotropic turbulence model.
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도서형 동맥피판의 생존에 대한 Chemical Leech의 효과
최태엽,심영기,이세일,홍인표 大韓成形外科學會 1992 Archives of Plastic Surgery Vol.19 No.1
A good circulatory balance between arterial inflow and venous outflow is vital in the success of replantation of amputated digits or free flap transfers. However, under some circumstances, it is not easy to anastomose the vein after arterial sutures. Several methods have been tried to enhance the survival of the replanted finger when veins were difficult to anastomose. In 1989 Barnett et al experienced three successful cases of digital replantation without venous anastomosis by injecting the calcium heparin subcutaneously into the replasnts at intervals over 9 days, and they called it 'chemical leech'. The objective of this study is to identify the effect of chemical leech in the rabbit. 14 rabbits were used as the experimental animals in the present study and were divided into 2 surgical groups. Each animal was anesthetized with intramuscular ketamine. Arterialized island flaps where vascular pedicles were composed of a central auricular artery and denuded ear cartilage were elevated. The chemical leech applied the rt. ear and It. ear was the control. The results were obtained after observation of 14 rabbits for 7 days. 1. The period from postoperative 3rd to 5th was the most critical to the survival of the flap 2. The survival rate of the chemical leech group (57.14%) was higher than that of the control group (21.42%) So we recommend this method in such various clinical situations as a replanted digits without venorrhaphy or flaps with venous insufficiency.
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최태엽,심영기,이세일,백현중 大韓成形外科學會 1991 Archives of Plastic Surgery Vol.18 No.4
Recently due to rapid development of instruments, knowledge of vascular anatomy and microsurgical technique, the free flap transfer has come into wide use in plastic and reconstructive surgery. And it offers another alternative for coverage of major defects in the lower extremity. From Jan. 1981 to Jun. 1989 authors had performed 16 free flap transfers for reconstruction of major tissue defects in the lower extremity which were thought to be difficult in repair by other conventional methods. Used donor flaps were latissimus dorsi musculocutaneous flap (7 cases), Groin cutaneous flap (3 cases), groin osteocutaneous flap(2 cases), dorsalis pedis flaps(3 cases)and a medial plantar flap. An overall success rate was 87.5%. It is felt that flap transfer is efficient, reliable and last choice to cover extensive tissue loss or severe wounds in the lower extremity with no fear of amputation above the damaged area.
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인태아 척수 외측운동주의 발육에 관한 전자현미경적 연구
윤재룡,최태엽,남광일,Yoon, Jae-Rhyong,Choi, Tai-Yeop,Nam, Kwang-Il 한국현미경학회 1996 Applied microscopy Vol.26 No.3
The prenatal development of lateral motor columns in the lumbar spinal cord was studied by electron microscopy in human embryos and fetuses ranging from 9 mm to 260 mm crown-rump length ($5{\sim}30$ weeks of gestational age). At 9 mm embryo, the lateral motor column were developed from ventro-lateral projection into the marginal layer and composed of primitive neuroblasts. At 20 mm embryo the primitive motor neurons were packed closely together and could readly be distinguished from primitive glioblasts by a presence of large nuclei. The primitive multipolar neurons were observed in lateral motor column at 40 mm fetus. At 80 mm fetus multipolar neurons were characterized by their many dendrites and axons in the vicinity of motor neuron perikarya. At 260 mm fetus, the motor neurons were large and contained all intracytoplasmic structures in the cytoplasm which were also found in mature motor neuron in lateral motor column. The first axo-dendritic synapses found at 40 mm fetus and increased in number throughout fetal development. Axo-somatic synapses with spherical vesicles were first observed at 80 mm fetus. A few axo-somatic synapses were found at next prenatal stages. Axo-dendritic and axo-somatic synapses contained mixed populations of spherical and flattened vesicles by 120 mm fetus. These findings indicate that axo-dendritic synapses develop prior to axo-somatic synapses in the spinal cord during neurogenesis.
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2상 기포탑에서 기포의 역학적 및 혼합특성에 관한 연구
전병관,최태엽,이진만 東新工科大學 1988 論文集 Vol.1 No.-
Gas holdup and axial dispersion coefficient have been measured to study the hydrodynamic and mixing characteristics of bubbles in dilute alcohol solutions. The experiments were carried out in a 10cm diameter, 130cm tall, continuous bubble column and gas velocities were varied from 0.5 cm/s to 3.5cm/s, while liquid velocities were varied from 0.5cm/s to 1.0cm/s. The gas holdup was correlated with the superficial gas velocities and the carbon number and the correlation appeared as follows. ε_G=0.03459 · V_SG^1.1235 · C_N^0.09122 In aliphatic alcohol solutions, the axial dispersion coefficient was increased with an increase in the superficial velocities and the carbon number, decrease of the carbon number effected the higher mixing because of the finer dispersion.
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