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- 저자 : 황순구 ( Soon Gu Hwang ) (검색결과 14 건)
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기초 :뇌종양 조직으로부터 Telomerase의 순수분리와 활성 억제에 관한 연구
황순구 ( Soon Gu Hwang ),이영우 ( Young Woo Lee ) 대한뇌종양학회 2009 대한뇌종양학회지 Vol.8 No.1
Objective:Telomerase activity was examined in human brain tumor and compared with their histological diagnosis. Methods:The 70 brain tumor tissues were surgically obtained from 68 cases at Department of Neurosurgery, Pusan National University Hospital between 1996 and 1999. Results:The result of telomerase assay of various brain tumor tissues, 6 of 8 glioblastoma multiforme, 7 of 8 anaplastic astrocytoma, 1 of 1 anaplastic oligodendroglioma and 5 of 6 metastatic brain tumor, demonstrated telomerase activity. But epidermoid tumor, cystic teratoma, pituitary adenoma, ependymoma and meningioma did not exhibit high activity. Immunohistochemistry study using anti-CD68 primary antibodies was performed and the proliferative activity of tumor cells were evaluated. By immunohistochemistric study and then, the mean CD68 proliferative cell indexes(PCI) were the followings: glioblastoma(38.4%), anaplastic astrocytoma(18.0%) and anaplastic oligodendroglioma(16.70%). The results recognized that there was no correlation between telomerase activity and CD68 PCI. But the malignant brain tumors had higher PCI values than those of benign tumors. The telomerase from brain tumor cells was purified to homogeneity through one step affinity column chromatography using Ultralink- immorbilized Neutravidin plus beads. The resulting affinity purified telomerase was active in PCR-amplified telomerase assays. The purified telomerase complex was a molecular weight of 374 KD and had triple components. The effect of antisense oligonucleotides complementary to the RNA component of telomerase on telomerase activity in purified enzyme had been studied. Pronounced inhibition of telomerase activity was observed at the oligonucleotide concentration in the reaction mixture of about 0.4 μM. Conclusion:It might be considered that the antisense oligonucleotide complementary to the human telomerase RNA component in the region of the template synthesis of telomeric repeats is the efficient inhibitor of telomerase activity.
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노인곤 ( In Gon Ro ),황순구 ( Soon Gu Hwang ),우인성 ( In Sung Woo ),황명환 ( Myung Whan Hwang ) 한국안전학회(구 한국산업안전학회) 2013 한국안전학회지 Vol.28 No.8
This study, as a basic research on how to lower the harmonic current spreading to the power source system, presents the theoreticalanalysis of harmonics current generating at the source part of electric facility. For the analysis, the harmonics current influencing on thesource as well as its sub-parts was analyzed and the standards of harmonic current controll a few of developed countries were multiplechecked and investigated. Besides, to analyze the harmonic current appearing at the various power sources of electric facilities with poweranalyzer, 15 electricity accommodators and the wave-types according to the loading system were chosen and measured, respectively. Also,the harmonics current depending upon power-loading style was investigated after the level of harmonic current was rated. From the results, itwas checked that the total harmonic distortion (THD) lowers down to 9.3 percent due to the reduction of current harmonic by installing aseries reactor on the streetlamp and that the series reactor is effective for the reduction of current harmonic.
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전혜리,박정한,박순우,허창규,황순구,Jun, Hae-Ri,Park, Jung-Han,Park, Soon-Woo,Huh, Chang-Kyu,Hwang, Soon-Gu 대한예방의학회 1998 예방의학회지 Vol.31 No.4
This study was conducted to assess the attitude of pregnant women toward delivery method, understanding of the reason for determining her own delivery method, participation in decision-making process and satisfaction with delivery method after labor. Study subjects were 693 pregnant women who had visited obstetric clinic for prenatal care in the last month of pregnancy in one general hospital and one obstetrics-gynecology specialty hospital in Taegu city from February 1 to March 31 in 1998. A questionnaire was administered before and after labor and a telephone interview was done one month after labor. Proportion of women who had health education and/or counselling about delivery method during prenatal care was 24.0% and this proportion was higher for women who had previous c-section(35.5%) than others. Women thought vaginal delivery is better than c-section for both maternal and baby's health regardless of previous delivery method. About 90% of primipara and multiparous women who had previous vaginal delivery wanted vaginal delivery for the index birth, while 85.6% of multiparous women who had previous c-section wanted repeat c-section. Reasons for choosing c-section in pregnant women who preferred vaginal delivery before labor were recommendation of doctors(81.9%), recommendation of husband (0.8%), agreement between doctor and pregnant woman(4.7%), and mother's demand (12.6%). Reasons for choosing vaginal delivery were mother's demand(30.6%) and no indication for c-section(67.2%). Reasons for choosing c-section in pregnant women who preferred c-section before labor were recommendation of doctors(76.2%), mother's demand(20.0%), recommendation of husband(1.3%), and agreement between doctor and pregnant woman(2.5%). Of the pregnant women who had c-section, by doctor's recommendation, the proportion of women who had heard detailed explanation about reason for c-section by doctor was 55.1%. Mother's statement about the reason for c-section was consistent with the medical record in 75.9% . However, over 5% points disparities were shown between mother's statement and medical record in cases of the repeat c-section and mother's demand. In primipara and multiparous women who had previous vaginal delivery, the delivery method for index birth had statistically significant association with the preference of delivery method before labor(p<0.05). All of the women who had previous c-section had delivered the index baby by c-section. Among mothers who had delivered the index baby vaginally, 84.9% of them were satisfied with their delivery method immediately after labor and 85.1% at 1 month after labor. However, mothers who had c-section stated that they are satisfied with c-section in 44.6% immediately after labor and 42.0% at 1 month after labor. Preferred delivery method for the next birth had statistically significant association with delivery method for the index birth both immediately after labor and in 1 month after labor. The proportion of mothers who prefer vaginal delivery for the next birth increased with the degree of satisfaction with the vaginal delivery for the index birth but the proportion of mothers who prefer c-section for the next birth was high and they did not change significantly with the degree of satisfaction with the c-section for the index birth. These results suggest that the current high technology-based, physician-centered prenatal and partritional cares need to be reoriented to the basic preventive and promotive technology-based, and mother-fetus-centered care. It is also suggested that active involvement of pregnant woman in decision-making process for the delivery method will increase the rate of vaginal birth after c-section and decrease c-section rate and improve the degree of maternal satisfaction after delivery. 본 연구는 임산부들의 분만전 분만방법에 대한 태도, 자신의 분만방법에 대한 이해 및 개입 정도, 분만후 분만방법에 대한 만족도 등을 평가하기 위하여 대구시내 1개 대학병원과 1개 산부인과 전문병원에서 산전진찰을 목적으로 내원한 임신 36주 이상의 임부 693명을 대상으로 분만전, 분만직후, 분만 1개월 후 3차례에 걸쳐 설문조사를 시행하였다. 임신기간 중 분만방법에 대한 교육이나 상담을 받은 임부는 24.0%였으며, 교육이나 상담을 받은 임부의 비율은 이전에 제왕절개분만을 한 임부에서 유의하게 높았다(p<0.05). 초산부, 자연분만을 했던 경산부, 제왕절개분만을 했던 경산부 모두 자연분만이 엄마나 아기의 건강에 더 좋다고 대답하였으나, 제왕절개분만을 했던 임부들 중 9.2%는 제왕절개분만이 아기의 건강에 더 좋다고 생각하였다. 분만전 선호하는 분만방법은 초산부와 자연분만을 했던 경산부는 90% 이상이 자연분만을 원했으나, 제왕절개분만을 했던 경산부는 85.6%가 제왕절개분만을 선호하였다. 분만전 자연분만을 선호하였던 임부들이 제왕절개 분만을 결정하게 된 이유는 의사의 권유가 81.9%, 남편의 권유가 0.8%, 충분히 상담후 결정한 경우가 4.7%, 산모가 원하여 12.6%였으며, 자연분만을 결정하게 된 이유는 대부분이 제왕절개분만을 할 특별한 사유가 없었거나(67.2%) 산모가 원한 것(30.6%)으로 나타났다. 제왕절개분만을 원했던 임부들의 제왕절개분만을 결정하게 된 이유는 의사의 권유가 76.2%, 산모가 원한 경우 20.0%, 남편의 권유가 1.3%, 의사와 충분히 상담후 결정한 경우는 2.5%였다. 의사의 권유로 제왕절개분만한 산모가 수술 이유에 대해 충분히 설명을 들은 경우는 55.1%였다. 제왕절개분만을 한 산모들의 수술 이유에 대한 의무기록과 산모 대답간의 일치율은 75.9%였으며, 반복 제왕절개분만일 경우와 산모가 원한 경우에 5% point 이상 응답을 차이가 났다. 초산부와 자연분만을 했던 경산부의 산전에 선호한 분만방법은 실제 분만방법과 유의한 관련성을 보였고(p<0.05), 제왕절개분만을 했던 경산부들은 선호도에 관계없이 100% 제왕절개분만을 하였다. 분만후 분만 방법별 자신의 분만방법에 만족하는 비율은 자연분만한 산모는 분만직후 84.9%, 분만 1개월 후 85.1%였으나 제왕절개분만을 한 산모는 분만직후 44.7%, 분만 1개월 후 42.0%로 나타냈다(p<0.05). 분만후 분만방법에 대한 선호도는 분만직후, 분만 1개월 후 모두 분만방법과 유의한 관계를 보였고, 각 시기별 분만방법에 대한 만족도와는 자연분만을 한 산모들은 자신의 분만방법에 만족할수록 자연분만을 선호하였지만, 제왕절개분만을 한 산모들은 만족 정도와 관계없이 제왕절개분만에 대한 선호도가 높았다. 이러한 결과는 그동안의 의사 중심의 전문적인 기술위주의 산전관리와 분만관리에서 기본적인 예방 및 건강증진 위주의 임부와 태아 중심 관리로의 방향 전환이 필요하며, 임부의 임신과 분만에 관한 적극적인 교육 및 상담이 필요하며, 분만방법 결정과정에 임부가 적극적으로 참여함으로써 제왕절개 분만율을 낮추고 제왕절개술후의 자연분만을 유도할 수 있을 뿐만 아니라 분만후 분만방법에 대한 만족도도 향상시킬 수 있음을 시사한다.
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Hwang, Soon Gu,Lee, Young Woo 대한신경외과학회 1993 Journal of Korean neurosurgical society Vol.22 No.7
가토에서 대조내 자가 신선혈 0.2㎖를 주입 후 6시간에 생리식염수와 여러 농도의 운nimodipine 용액(10, 30 및 60㎍/㎏)을 각각 정맥주사하여 야기되는 뇌연막혈관들의 반응(직경변화)을 연구하였다. 혈관의 측정은 개두술 후 수술현미경 최고 확대(40×)하에서 현미경의 대안렌즈에 Filar micrometer eyepiece(424 and 426, AO)을 부착하여 시행하였다. 이 Filar micrometer eyepiece의 한 눈금은 3.4㎛로 매우 미세한 소혈관까지 직접 측정할 수 있었다. PaO₂, PaCO₂ 및 동맥혈 pH는 대개 전 실험을 통해서 의의있는 변화를 보이지 않았다. 수축기 동맥압은 nimodipine 용액 주입 직후에 다소의 하강을 보였으나(p<0.05) 이러한 변화는 수축기 동맥압의 일시적인 하강현상이고 곧 정상 수준으로 복귀했다. 실험적 뇌지주막하 출혈 6시간 후 nimodipine 용액과 동일한 량의 생리식염수를 주입하였을 때 뇌연막혈관의 반응은 미미하여 그 통계학적 의의는 없었다(p>0.05). 그러나 nimodipine 용액을 정주하였을 때는 Group Ⅰ, Group Ⅱ 그리고 Group Ⅲ 모두에서 뇌연막혈관의 확장을 보였다. 이러한 혈관의 확장은 동맥, 특히 소동맥에서 현저한 양상을 보였으며 대연막동맥에서도 상당히 의의있는 혈관 확장을 보이기는 했으나 소연막동맥에서만큼 현저하지는 않았다. 이러한 뇌 연막동맥의 확장은 약물 주입 후 5, 10분에 가장 뚜렷하였으며 그 후는 시간이 경과함에따라 혈관의 직경이 서서히 감소하는 양상을 보였다. 뇌연막정맥의 경우에도 nimodipine용액의 정주 후 미약한 정도의 혈관확장을 보였으나 그 확장된 정도는 뇌연막동맥에 비해 미미하였으며 통계학적 의의도 적거나 없었다. 뇌연막동맥의 nimodipine에 대한 반응은 10, 30 그리고 60㎍/㎏의 약물 양의 변화에 비교적 민감하여 용량에 비례하는 소견을 보였다. 이상의 결과에서 뇌 지주막하 출혈이 야기된 실험동물에 nimodipine을 정주했을 때 뇌연막동맥의 현저한 확장이 야기되며 특히 소동맥이 민감하게 확장되는 사실은 뇌지주막하출혈에 의한 뇌허혈성 질환에 있어 nimodipine의 치료적 유용성을 입증할 수 있는 좋은 증거가 될 것으로 생각되며 그 효능은 정주된 실험약물의 양에 비례하였다. 이로서 부작용이 허용되는 범위 내에서 다량의 nimodipine을 허혈성 뇌혈관질환에 사용하여 치료적인 효과를 기대할 수 있을 것이라 생각된다. The author have studied effects of intravenous injection of normal saline and nimodipine solution(10, 30 and 60㎍/㎏) on cerebral pial vessels at 6 hours after experimental subarachnoid hemorrhage. Measurement of pial vessels were performed under operation microscope through the bilateral craniectomy area. Filar micrometer eyepiece was attached on the oculus of microscope(40×) to make it easier to measure fine pial vessels directly. Measuring unit of this micrometer eyepiece was 3.4㎛. Physilogic parameters(PaO₂, blood pH) generally did not show significant change all through the experiments except that systolic blood pressure showed temporary decrease immediately after the injection of nimodipine solution, which returned to base level soon. Small pial arteries were by far most effectively dilated by intravenous injection of nimodipine solution especially in 5 minutes. Large arteries also presented significant dilatation after the injection. The arteries were dilated as dose-dependent manner. Veins showed dilatation to the lesser degree than arteries independent of dosage of nimodipine, that was statistically of no significance. Conclusively, nimodipine might be used in treatment of vasospasm in subarachnoid hemorrhage in practice.
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황순구,장병조,이영우,박동준,최창화 대한신경외과학회 1993 Journal of Korean neurosurgical society Vol.22 No.11
Oligodendroglioma that occurs in the ventricle has been reported uncommonly. The case is reported of a 38-year-old man who presented with severe headache and vomiting and was discovered to have an oligodendroglioma in the lateral and third ventricles. The clinical presentation, radiological finding, pathology and response to radiation are described with brief review of general biology in oligodendroglioma.
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