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BRW Stereotaxic System을 이용한 뇌간신경교종의 정위수술적 생검술
지용철,최병연,문충배,백승찬,조수호 영남대학교 의과대학 1986 Yeungnam University Journal of Medicine Vol.3 No.1
본 교실에서는 2례의 뇌간부위 병소에서 BRW system을 이용한 정위적 생검술을 시행하여 악성 신경교종 및 신경교 성상 세포종 Grade II로 확진된 예를 경험하였기에 문헌고찰과 함께 보고하는 바이다. Histopathological diagnosis of brain stem glioma should be performed for the purpose of the determination of its management and clonical course, but its surgical biopsy has been followed by high mortality and morbidity. We performed the tissue sampling for histological examination with BRW stereotaxic system under local anesthesia successfully.
Chi, Suk-Hwan,Kim, Seung-Chan,Shin, Choong-Soo S.,Lee, Tae-Soo 한국정밀공학회 2011 International Journal of Precision Engineering and Vol.12 No.4
Recently demand oxygen delivery (DOD) system has been preferred to continuous flow oxygen (CFO) method for long term oxygen therapy in patients with chronic obstructive pulmonary disease, since DOD system supplies oxygen during only inhalation and saves oxygen consumption. However, the oxygen saving ratio have not properly compared without considering fraction of inspired oxygen ($FIO_2$), though $FIO_2$ determines the efficacy of treatment. The purpose of this study was 1) to investigate the equivalence between the CFO method and a DOD system in terms of $FIO_2$ with considering dead space under various breathing parameters, 2) to propose and calculate the new effective oxygen saving ratio of the DOD method, 3) to compare $FIO_2$ obtained from calculation with that from experiment. The mathematical and experimental models of human respiratory system were developed. $FIO_2$ was calculated depending upon various breathing parameters and the new effective oxygen saving ratio was calculated to accurately compare oxygen saving consumption between the DOD and CFO method. Results of this study have shown that as supplied volume of oxygen increased, $FIO_2$ linearly increased. As beat per minute or tidal volume increased, $FIO_2$ decreased. The obtained $FIO_2$ between mathematical model and experiment showed errors less than 5% in CFO method and less than 11% in DOD method. Effective conserving oxygen ratios of the DOD system changed between 3.4 and 3.8, but had higher values when the volume of supplied oxygen was larger. In conclusion, CFO method had different equivalent values of $FIO_2$ depending on breathing parameters. Therefore it is appropriate to take into account of $FIO_2$ when considering performance of oxygen saving devices. The effective oxygen saving ratio proposed in this study may provide the new valuable index of oxygen saving of the DOD method while maintaining the same treatment effect compared with CFO method. In addition, the mathematical model developed in this study seems to predict $FIO_2$ similarly as obtained using experiment.
池忠洙,崔秉泳 전북대학교 공업기술연구소 1983 工學硏究 Vol.13 No.-
A study has been made on the transformation behavior of austenite from various initial structure, coarse ferrite+pearlite, fine ferrite+pearlite, tempered martensite in low carbon Mn steels. In order to observe the process of austenite formation, specimens were soaked an 890℃ for 10~300 sec. Experimental results showed as follows ; 1. The rate of austenite transformation is increased in case of smaller grain size of initial structure and at higher heating temperature. Transformation from tempered martensite is faster than that from ferrite+pearlite initial structure. 2. There is incubation period prior to nucleation at the beginning of austenite transformation, ant it is shorter in case of smaller grain size and at higher heating temperature. 3. Nucleation of austenite is observed at ferrite-ferrite boundary and ferrite-pearlite interface. Nuclei of austenite form primarily at pearlite region and grow into ferrite region.
Lee, Chi-Hoon,Hur, Sang-Woo,Na, Oh-Soo,Baek, Hae-Ja,Noh, Choong-Hwan,Han, Sang-Hyun,Lee, Young-Don The Korean Society of Developmental Biology 2014 발생과 생식 Vol.18 No.3
We investigated the androgenic effects of $17{\alpha}$-methyltestosterone (MT) on gonadal sex reversal in juvenile red spotted grouper Epinephelus akaara. The fish were immersed in $17{\alpha}$-MT at 1 and 5 mg/L. Treatment method of $17{\alpha}$-MT was once weekly for 4 and 8 weeks. Fish were sampled at 12 months after end of the treatment period in order to histological analysis. At the initiation of an experiment (70 day after hatching), juvenile red spotted grouper have the paired primordial gonads with somatic cells bellow kidney in the posterior portion of the body cavity. Formation of ovarian cavity indicates that the ovarian differentiation beginning at 70 DAH in red spotted grouper. At 12 months after end of the treatment period, control group, $17{\alpha}$-MT 1 mg/L treatment group for 4 and 8 weeks, and $17{\alpha}$-MT 5 mg/L treatment group for 4 weeks were all female. However, sex-changed males without ovarian cavity were observed in the $17{\alpha}$-MT 5 mg/L treatment group for 8 weeks. In grouper, we firstly reported that the red spotted grouper be able to induce the primary males by hormone treatment prior to gonadal sex differentiation.
Lee, Chi-Hoon,Hur, Sang-Woo,Na, Oh-Soo,Baek, Hae-Ja,Noh, Choong-Hwan,Han, Sang-Hyun,Lee, Young-Don 한국발생생물학회 2014 발생과 생식 Vol.18 No.3
We investigated the androgenic effects of 17α-methyltestosterone (MT) on gonadal sex reversal in juvenile red spotted grouper Epinephelus akaara. The fish were immersed in 17α-MT at 1 and 5 mg/L. Treatment method of 17α-MT was once weekly for 4 and 8 weeks. Fish were sampled at 12 months after end of the treatment period in order to histological analysis. At the initiation of an experiment (70 day after hatching), juvenile red spotted grouper have the paired primordial gonads with somatic cells bellow kidney in the posterior portion of the body cavity. Formation of ovarian cavity indicates that the ovarian differentiation beginning at 70 DAH in red spotted grouper. At 12 months after end of the treatment period, control group, 17α-MT 1 mg/L treatment group for 4 and 8 weeks, and 17α-MT 5 mg/L treatment group for 4 weeks were all female. However, sex-changed males without ovarian cavity were observed in the 17α-MT 5 mg/L treatment group for 8 weeks. In grouper, we firstly reported that the red spotted grouper be able to induce the primary males by hormone treatment prior to gonadal sex differentiation.
좌측 대뇌 전두엽 실질내에 발생한 뇌실상의종(Ependymoma) 1치험례
문충배,변박장,이인수,강득용,지제근 대한신경외과학회 1977 Journal of Korean neurosurgical society Vol.6 No.1
A case of papillary ependymoma in the left frontal lobe was presented, because in Korea the cerebral ependymoma with no attachment to the ventricles was very rare. The patient was 40 years old female who had complained of severe headache and experienced occasional generalized tonic convulsions for 2 years prior to admission. We could treat the patient successfully by surgery. The tumor mass was attached to a part of the wall of a large cystic cavity which located within the brain substance of left frontal lobe. The tumor tissue was soft and papillary, and looked like a choroid plexus in the ventricles or a mural nodule in the wall of a large cyst which we may find occasionally in cerebellar hemangioblastomas. The cyst was filled with clear limpid yellow fluid of about 120 cc. The cyst-wall was not lined with any membrane, and was devoid of tumor tissue. The microscopic findings of tumor showed many papillary growths with the stroma having telangiectasias and irregular mixture of fibrous connective tissue and neuroglial cells.
임수덕,허충림,우종설,서웅석,윤재일,지형인 대한피부과학회 1982 大韓皮膚科學會誌 Vol.20 No.6
Marjolin's ulcer seated upon an old cicatrix, especially old burn scar, which may chiefly degenerated into a squamous cell carcinoma with propensity for metastasis. We are experienced two cases of Marjolins ulcer recently. A 54-year-old male who had a Marjolins ulcer(15±×40cm) on his left lower extremity. He was experienced burn at the age of eight and rice sized ulcer was developed at the site of burn scar about 21 years ago. The ulcer progressively enlarged in size to reach 15x40cm for 21 years. The pathologic diagnosia was squamous cell carcinoma grade 1, but cancer cells invaded to deep dermie and subcutaneous tissues. Severe skin lesion and irreversible osteoporotic degeneration on knee joint of affected limb were present. So he was treated by high above knee amputation. Another 58-year-old female who had a Marjolins ulcer(10x20cm) on her right lower extremity. She was experienced burn at the age of forty eight and bean sized ulcer was developed at the site of burn scar about 1 year ago. The pathological diagnosis was squamous cell carcinoma grade 1 and invasian of cancer cells was limited upper dermis. On lymph node biopsy, the histological diagnosis was within normal limit. So she was treated radical surgical excision with split thickness skin graft(Mesh).