소아 두뇌외상의 임상적 고찰

서성일,송시헌,김성호,김관태,김윤 대한신경외과학회 1995 Journal of Korean neurosurgical society Vol.24 No.2

The clinical analysis was carried out with 182 cases of craniocerebral injuries under 15 years of age, admitted at the Department of Neurosurgery, Chung Nam National Universty Hospital during the period from September, 1990 to September 1993. Following results were obtained : 1) There were 133 males and 49 females and sex ratio was 2.7% 2) Age incidence of the accidents was greatest at 6 years of age and mostly distributed to the age group between 4 to 7. 3) Seasonal peak of the accidents was at May. 4) The accident occurred mostly botween 4 P.m. and 6 P.m in a day.5) The most frequent cause of the craniocerebral injuries was traffic accident(105cases, 57.69%) 6) No deterioration of cansciousness before and after the admission was doserved in 68cases(37.36%) 7) Pupillary change was observed in 25 cases and Babinski sign was elicitable in 31cases 8) Early convulsion and vomiting were frequent symptoms in childhood. 9) Skull fracture was observed in 72 cases(39.56%) in which linear fracture was most frequent and predilection site was parietal bone. 10) The accompanying rate of skull fracture in intracranial hemorrhage was 65.54% 11) Associated injures were found in 44 cases(24.18%). The frequent ones were e xtremity fracture, clavicle fracture 12) The overall mortality was 7.14%.

3차원 전산화단층촬영 영상을 이용한 안면 연조직 두께 계측의 임상적 유용성

정호걸,김기덕,한승호,허경석,이제범,박혁,최성호,김종관,박창서 대한구강악안면방사선학회 2006 Imaging Science in Dentistry Vol.36 No.2

Purpose : To evaluate clinical usefulness of facial soft tissue thickness measurement using 3D computed tomographic images. Materials and Methods : One cadaver that had sound facial soft tissues was chosen for the study. The cadaver was scanned with a Helical CT under following scanning protocols about slice thickness and table speed; 3 mm and 3 mm/sec, 5 mm and 5 mm/sec, 7 mm and 7 mm/sec. The acquired data were reconstructed 1.5, 2.5, 3.5 mm reconstruction interval respectively and the images were transferred to a personal computer. Using a program developed to measure facial soft tissue thickness in 3D image, the facial soft tissue thickness was measured. After the ten-time repeation of the measurement for ten times, repeated measure analysis of variance (ANOVA) was adopted to compare and analyze the measurements using the three scanning protocols. Comparison according to the areas was analyzed by Mann-Whitney test. Results : There were no statistically significant intraobserver differences in the measurements of the facial soft tissue thickness using the three scanning protocols (p>0.05). There were no statistically significant differences between measurements in the 3 mm slice thickness and those in the 5 mm, 7 mm slice thickness (p>0.05). There were statistical differences in the 14 of the total 30 measured points in the 5 mm slice thickness and 22 in the 7mm slice thickness. Conclusion : The facial soft tissue thickness measurement using 3D images of 7 mm slice thickness is acceptable clinically, but those of 5 mm slice thickness is recommended for the more accurate measurement.

扶正益氣方의 抗癌活性과 免疫調節作用에 관한 硏究

具滋權,宋昊哲,金東熙,徐榮培,朴陽春,金聖勳 대한본초학회 2000 大韓本草學會誌 Vol.15 No.1

To evaluate the antitum or activity and immune response Bujungikgibang(BJ1GB) studies were done experimentally. The results were obtained as follows: 1. BJIGB extracts exhibited a weak cytotoxicity against SK-OV-3, and SK-MEL-2 cell lines. While it showed cytotoxicity against B16-Fl0 cell line up to 30% of control at concentration of 0.5 mg/ml. 2. BJIGB extracts significantly showed inhibitoty effect on DNA topoisomerase 1 from calf thymus in a dose-dependant manner. 3. BJIGB extracts showed antiadhesive rates against A549, at 30% at 0.5 mg/ml, 60% at 1 mg/ml 4. BJIGB extracts inhibited CAM angiogenesis up to 60%. 5. BJIGB extracts prolonged life span of ICR mice bearing S-180 sarcoma cells up to 130.5%. 6. In FACS analysis, the population of helper T cell was increased weakly, while cytotoxity T cell was decreased insignificantly. 7. The production of nitric oxide in RAW cell stimulated by LPS was incresed at 0.5mg/ml or more in dose dependant fashion as compared with control. 8. Proliferation rate of splenocyte was increased at 0.5mg/ml or more a dose dependant fashion as compared with control. These results suggested that BJIGB extracts might be usefully applied for treatement of cancer and also it was nesessary to do more studies about its mechnisms.

N-메틸화된 폴리(4-비닐피리딘)과 메틸오렌지동족체와의 상호작용에 있어서 무기전해질 첨가의 영향

김우식,서관호 경북대학교 산업기술연구소 1987 産業技術硏究誌 Vol.15 No.-

The binding of methyl orange and its homologs by N-methylated poly (4-vinylpyridine) has been investigated in the presence of sodium ch1-oride by the equilibrium dialysis method. The first binding constants and the Gibbs free energy changes for these binding systems were calculated in various concentrations of NaCl in order to clarify the effects of sodium chloride on the binding behaviors and to gain some insight into the nature binding energy. It was found that the first binding constants decreased with an increase in sodium chloride concentration and tend to approach a constant value above 0.4 mol NaCl. This might be due to the shielding of electric field around the binding system. The electrostatic force for the binding of methyl orange, ethyl orange, propyl orange by N-methylated poly (4-vinylpyridine) were estimated to be -1.97~-1.96㎉/㏖ and the other binding forces -4.31, -4.53, -4.78 ㎉/㏖ respectively. From these results, the calculated hydrophobic contribution for these binding systems were 69~71%. Therefore, the hydrophobic interaction seems to play an important role in these binding systems.

정신분열병 환자의 가족부담 척도 개발에 대한 예비연구

김철권,조진석,서지민,김용관,김호찬,김현수,김상수,제영묘 大韓神經精神醫學會 1999 신경정신의학 Vol.38 No.3

연구목적 : 정신분열병 환자의 가족이 느끼는 부담을 측정하기 위한 가족부담 척도를 개발하기 위함이다. 방 법 : 200명의 정신분열병 환자 가족과의 비구조적 면담과 외국 부담척도 고찰을 통하여 94문항을 수집하였고 그 다음에 전문가들과 가족들이 문항 및 영역을 분류하고 통합하여 최종적으로 36문항을 선정하였다. 그리고 정신분열병 환자의 가족 135명, 불안장애 환자의 가족 22명, 기분부전장애 및 신체화 장애 환자의 가족 26명, 치매 환자의 가족 49명을 대상으로 신뢰도와 타당도를 검증하였다. 결 과 : 자료분석 결과 검사-재검사 신뢰도, 내적 일치도, 감별타당도 모두 높게 나타났으며, 요인분석을 통해 다섯 가지 구성요인이 추출되었다. 결 론 : 본 가족부담 척도는 정신분열병을 포함한 만성 정신질환을 앓고 있는 환자의 호전과 가족의 부담을 덜어주기 위한 다양한 프로그램의 효과를 검증하는데 유용하게 사용되어질 수 있을 것이다. Objectives : This preliminary study was carried out to develop the Family Burden Scale(FBS) of the schizophrenics. Methods : Ninety-four items were collected by interviewing in a free unstructured format with one relative of each 200 schizophrenic patients and reviewing foreign FBS's. Several professionals and relatives were asked to group and integrate them into several categories. Finally 36 burden items were chosen to constitute a FBS. The FBS was administered to the relatives of 135 schizophrenic, 22 anxiety disorder, 26 dysthymic disorder and somatization disorder, and 49 dementia patients for examining the reliability and validity. Results : The FBS showed high test-retest reliability, internal consistency, and discriminant validity. The results of the factor analysis revealed five-factor solution. Conclusion : The FBS can be used to evaluate the effectiveness of various programs intended not only to reduce decompensation among schizophrenics, but also to alleviate family burden.

Drag Reduction of Dilute Poly(acrylamide) Solutions in Flow

Seo, Kwan-Ho,Kim, Woo-Sik,Kang, Inn-Kyu 慶北大學校 1992 論文集 Vol.52 No.-

흐름과정에서의 항력감소에 미치는 고분자의 효과를 조사하기 위해 직경이 서로 다른 두 종류의 관을 사용하여 여러농도에서의 레이놀즈 number를 구하였다. 이대 계산의 근거가 되는 모델은 저자에 의해 이미 제안된 것을 사용하였다. 항력감소효과는 사용한 관의 직경 및 고분자 용액의 농도에 따라 서로 다르게 나타났고 이로 미루어 고분자 사슬의 형태가 항력감소에 중요한 인자로 작용하는 것을 알았다.

Effect of Thermoplastic Elastomer on the Foaming of Polypropylene with Chemical Blowing Agent

Kwan Ho Seo,Do Young Kim,Gi Hong Kim,Eun Ho Seo,Dong Gug Kang 한국고분자학회 2016 한국고분자학회 학술대회 연구논문 초록집 Vol.41 No.2

리튬 이온 전지 씰링에의 응용을 위한 EPDM, NBR, FKM, VMQ 및 FVMQ 특성연구

서관호 ( Kwan Ho Seo ),조광수 ( Kwang Soo Cho ),윤인섭 ( In Sub Yun ),최우혁 ( Woo Hyuk Choi ),허병기 ( Byung Ki Hur ),강동국 ( Dong Gug Kang ) 한국고무학회 2010 엘라스토머 및 콤포지트 Vol.45 No.3

리튬 이온 전지의 가스켓 재료로 사용되기 위해서는 내전해액성, 전기절연성, 낮은 압축 영구 줄음률, 비오염성, 내열성이 요구된다. Perfluoroalkoxy (PFA)보다 압축 영구 줄음률이 우수한 고무의 적합성을 평가하기 위하여 Ethylene Propylene Diene Monomer (EPDM), Nitrile Butadiene(NBR), Fluoro Elastomers(FKM), Methyl-Vinyl Silicone Rubber (VMQ), Fluorosilicone(FVMQ)을 이용하여 최적상태의 compound를 제작하고 특성을 살펴보았다. 시험편을 80 ℃의 propylene carbonate액에 침적하여 경도 및 체적변화를 1,000시간까지 시간별로 측정하였다. EPDM과 VMQ가 내전해액성이 우수하였으며, 전기절연성에서도 체적저항 기준 10(10)Ωcm이상의 결과를 얻을 수 있었다. 따라서, EPDM과 VMQ가 적절한 것으로 판단되었다. The materials of the lithium ion battery gasket require chemical resistance to the electrolyte, electrical insulating, compression set, anti-contamination and heat resistance. To estimate suitability for rubber which has better performance to compression set than PFA, each compound were made with various rubbers, such as EPDM, NBR, FKM, FVMQ, VMQ and we checked the characteristics of each compound. Samples from each compound was deposited in Propylene Carbonate and tested for changing of Hardness and Volume during 1,000 hr with 80 ℃. EPDM and VMQ showed good performance to chemical resistance to the electrolyte, and also we could get the values over 10(10)Ωcm on volume resistance basis in electrical insulating. EPDM and VMQ were judged as the most suitable material.

아크릴계 4 원공중합체 및 이들과 염화비닐 - 초산비닐 공중합체와의 블렌드의 점착물성

서관호(Kwan Ho Seo),고영철(Young Cheol Ko),이석기(Suk Kee Lee) 한국고분자학회 1998 폴리머 Vol.22 No.3

Effect of Co-agent on Cure, Mechanical Properties of NBR Compounds in Peroxide System

( Eun Ho Seo ),( Gi Hong Kim ),( Do Young Kim ),( Dong Won Lee ),( Kwan Ho Seo ) 한국고무학회 2017 엘라스토머 및 콤포지트 Vol.52 No.3

In this study, the effect of the cure, mechanical properties, and oil resistance of NBR (acrylonitrile-butadiene rubber)/ peroxide compounds were investigated for various co-agents. NBR compounds were characterized using a swelling test, a rheometer (MDR), and a compression set test. Mechanical properties were tested with original compounds, heated in air and exposed to the ASTM No.1, IRM 903 oil. NBR compounds were prepared using peroxide as the crosslinking agent. Trimethylolpropane trimethacrylate (TMPTMA), triallyl isocyanurate (TAIC), and 1,2-polybutadiene (HVPBD) were used as co-agents. The NBR compounds containing TMPTMA and HVPBD lowered the scorch time, while the addition of TAIC did not significantly change the scorch time. NBR compounds containing TMPTMA increased the crosslinking density, while the addition of TAIC and HVPBD lowered the crosslinking density. Moreover, the addition of TMPTMA improved the oil resistance of the NBR compound.