Preparation and Characterization of Surface Energy of BPDA-BAPP Polyimide

Kim, Kyung-Hoe,Kim, Yong-Gwon,Kwon, Young-Hwan The Polymer Society of Korea 2009 Macromolecular Research Vol.17 No.6

The surface properties (water sorption and repellency, adhesion) are closely related to the surface tension of polymer solids. The critical surface tension (${\gamma}_c$) and surface tension (${\gamma}_s$) of a polymer solid were estimated by the contact angle method by our quantitative imaging system. BPDA (3,3',4,4'-biphenyl tetracarboxylic dianhydride)-BAPP (1,3-Bis(4-aminophenoxy) propane) polyimide was successfully synthesized. The ${\gamma}_c$ values were analyzed by a Zisman plot, a Young-$Dupr\acute{e}$-Good-Girifalco plot, and a log ($1+cos{\theta}$) vs log ${\gamma}_L$ plot. The ${\gamma}_s$ value of BPDA-BAPE polyimide was evaluated using the geometric mean equation and our multiple regression analysis. The calculated values of ${{\gamma}_s^d$ (a dispersion component), ${{\gamma}_s^p$ (a polar component), ${{\gamma}_s^h$ (a hydrogen bonding component), and ${\gamma}_s$ were 30.79, 9.32, 0.20, and 40.31 $mN{\cdot}m^{-1}$, respectively. The ${\gamma}_s$ of BPDA-BAPP polyimide containing both a methylene group and an ether group was larger than that of the polyimide containing only a methylene group.

남자 알코올 의존 환자의 기질적 특성에 관한 연구

김성곤,민영기,이덕기,김미영,송영상,권도훈,고영훈,박제민,정병선 대한생물치료정신의학회 2003 생물치료정신의학 Vol.9 No.1

목 적: 본 연구의 목적은 한국인 남자 알코올 의존 환자의 기질적 특성을 Temperament and Character Inventory(TCI)를 이용하여 조사하는 것이다. 방 법: DSM-Ⅳ 진단 기준에 맞는 알코올 의존 환자 30명과 정상인 36명을 대상으로 연구학적 특성을 조사하고, 기질적 특성을 한글판 TCI를 이용하여 조사하였다. 모든 대상자의 나이는 30~60세였다. 결 과: 1) 두 군간 평균 나이는 유의한 차이가 없었으나, 교육 정도와 결혼을 유지하고 있는 비율 및 취업률은 알코올 의존군이 정상 대조군에 비해 유의하게 낮았다. 2) 알코올 의존군에서는 정상 대조군에 비해 Harm Avoidance(HA) 점수와 Self-transcendence(ST)점수는 유의하게 높았으며, Self-directiveness(SD)점수는 유의하게 낮았다. 3) 알코올 의존군 내에서의 각 척도들 간의 상관관계는, HA와 SD 점수, HA와 Persistence(PE) 점수, ST와 SD 점수는 각각 유의한 음의 상관관계, ST와 PE 점수, SD 점수와 Cooperativeness(CO) 점수, Reward Dependence(RD)와 CO 점수는 양의 상관관계를 보였다. 결 론: 이러한 본 연구의 결과는 한국인 남성에서 수줍음을 잘 타며, 걱정도 많고, 염세적이고 쉽게 피로해지는 기질적 특성이 알코올 의존과 연관성이 있음을 의미한다. Objectives : The purpose of this study was to assess the temperament of male parients with alcohol dependence. Methods : The subjects were 30 patients who met DSM-Ⅳ criteria for alcohol dependence and 36 normal controls. All subjects completed Temperament and Character Inventory(TCI) which was developed by Cloninger. Results : 1) The educational level, marital status, and occupation in alcohol dependence group were significantly lower than those of normal control group, but there was no difference in the age between two groups. 2) Among the scores of TCI, the score of harm avoidance(HA) and self-transcendence(ST) were significantly higher in the alcohol dependence group than in the normal control group. 3) In the alcohol dependence group, a significant negative correlation among the scores of TCI was between HA and SD, HA and Persistence(PE), ST and SD, and positive correlation between ST and PE, SD and Cooperativeness(CO), Reward Dependence(RD) and CO. Conclusion : These results suggest that shy, fearful, pessimistic and fatigable temperament are related to developing alcohol dependence in Korean males.

Gitelman씨 증후군 1예

차영학,송명준,신요식,김성민,김영욱,김윤권,김소연,김영중,조민구,이권전 全南大醫大 2001 전남의대학술지 Vol.37 No.3

제1형 신경섬유종증 환아의 구강내 병소의 치험례

권순연,김태완,김영진,김현정,남순현 大韓小兒齒科學會 2008 大韓小兒齒科學會誌 Vol.35 No.3

신경섬유종증은 상염색체 우성 유전성 질환으로,17번 염색체의 장완에 위치한 종양 억제 유전자의 변성에 의해 발생한다. 이는 두가지 형이 있으며 신경섬유종의 발생은 제1형 신경섬유종증의 임상적 진단 기준 중 하나이다. 신경섬유종증의 임상적 증상으로는 피부병소,골변형,중추신경계의 종양 등이 있으며 환자의 25%가 구강내 신경섬유종을 보인다. 악골내 신경섬유종은 드물며 방사선학적으로 하악공,하악관,이공을 포함하고 단방성으로 잘 경계된 방사선 투과성으로 나타난다. 신경섬유종은 하나 또는 그 이상의 병소에서 신경육종으로 전이된다는 점에서 임상적으로 중요하며 현재 특이한 치료법은 없으나,외과적 절제술이 좋은 치료법으로 여겨지고 있다. 본 증례는 제1형 신경섬유종증 진단을 받은 환아로,구강내 신경섬유종의 외과적 절제 후 양호한 결과를 보여 이를 보고하는 바이다. Neurofibromatosis is an autosomal dominant disorder caused by a mutation of a tumor supressor gene on the long arm of chromosome 17. There are two types of neurofibromatosis, and development of neurofibroma is one of clinical diagnostic criteria for neurofibromatosis. The clinical signs of neurofibromatosis include as skin lesions, bone deformities, and tumors involving central nervous system. About 25% of neurofibromatosis involves oral neurofibroma. Radiographically, oral neurofibroma is well-defined unilocular radiolucency, which involves mandibular canal, mandibular foramen and mental foramen. When a lesion is small and approachable, complete resection, including lcm of marginal connective tissue, is feasible. However, there are studies reporting that the recurrence rate after surgical resection is high and frequent recurrence may even increase the risk of malignant transformation. This case reports a patient with neurofibromatosis type I, accompanying oral neurofibroma, who shows a favorable result after surgical resection of the oral lesion.

한국산야생등줄쥐(Apodemus agrarius coreae)의 해마복합체에서 neuropeptide Y 면역반응세포에 관한 연구

김무강,송치원,이경열,박일권,정영길,이강이,김종섭 충남대학교 수의과대학 동물의과학연구소 1997 動物醫科學硏究誌 Vol.5 No.-

Neuropeptide Y(NPY) was first isolated from porcine brain. This discovery has lead some workers to study the distribution of this peptide in the central nervous system of various mammals. In this study the distribution pattern of neuropeptide Y-immunoreactive neurons was examined in the hippocampal complex of Striped field mouse in Korea(Apodemus agrarius coreae) Experimental animals were anesthesized with thiopental sodium and perfused with 4% paraformaldehyde through the left ventricle and the ascending aorta. The brains were removed and transferred 10%, 20% and 30% sucrose solution. Sections were cut on a cryostat into 40㎛-thick. The tissue was immunostained with free-floating and avidin-biotm complex(ABC) method. The results obtained in this study were summarized as followings. 1. The most of NPY-IR neurons in hippocampus proper were found in the polymorphic layer and a few was found in the pyramidal layer. 2. The process run vertically in the deep polymorphic layer and run parallel to corpus callosum in superficial polymorphic layer. 3. The shapes of neurons in hippocampus proper were varied of polymorphic, oval or round, and the nerve fibers were found in the molecular laver and the hippocampal fissure. 4. The highest density in number of NPY-IR neurons on dentate gyrus were found in hilar area of dentate gyrus. 5. The most of NPY-IR nerve fibers were found in molecular cell layer.

우리나라 도시와 농촌 지역 주민의 혈중 연 및 혈중 Zinc Protoporphyrin농도 비교 연구

김준연,김병권,홍영습,이용언,정갑열 동아대학교 부설 산업의학연구소 1997 산업의학연구소 논총 Vol.- No.3

The study was carried out on healthy population in urban and rural area, in order to compare the level of blood lead (PbB) and blood zinc protoporphyrin (ZPP) between the population living in each area from July 1 1994 to December 31 1994. We stratificated the results with sex, age and area. The results obtained were as follows; 1. In urban area, overall mean of the PbB level was 7.08±1.61㎍/dl and both men and women had the highest level of PbB, which were 8.15±0.85㎍/dl, 6.90±1.48㎍/dl, in less than 39 years old group. In rural area, overall mean of the PbB level was 6.75±1.61㎍/dl and both men and women had the highest levels of PbB, which were 7.25±2.29㎍/dl, 7.00±2.92㎍/dl in 40∼49 years old group. And there was statistically significant difference between mean of the men's PbB level in urban area and that in rural area (p<0.05). 2. In urban area, overall mean of the ZPP level was 32.08±8.28㎍/dl and men had the highest level of ZPP, which was 29.59±5.13㎍/dl, in 40∼49 years old group, and women had that, which was 36.83±7.95㎍/dl, in less than 39 years old group. In rural area, overall mean of the ZPP level was 34.54±11.31㎍/dl and men had the highest level of ZPP, which was 32.10±5.45㎍/dl, in less than 39 years old group and women had that, which was 40.17±14.02㎍/dl, in 40∼49 years old group. And there was statistically significant difference between mean of the men's ZPP level in urban area and that in rural area (p<0.05). 3. There was statistically significant difference in PbB and ZPP between men and women group in both area (p<0.05) but not significant among age group in both area (p>0.05).

야자 활성탄에 의한 폐수성분 제거 효율에 관하여

김용권,옥치율 부산교육대학교 과학교육연구소 1993 科學敎育硏究 Vol.18 No.-

By studying the relations between natures of activated carbon based on coconut shell and its changes with COD, SS and pH, it is shown that the results of sand filter and activated carbon adsorption of waste-water from automaker company turn out good. But this study shows that the only activated carbon adsorption treatment is not good enough when the concentration of untreatment water is too high.

가정용청소기의 유해전자파 억제대책에 관한 연구

김재이,고영권,전숙희 東新大學校 1999 論文集 Vol.11 No.-

In this paper, various emission patterns of vacuum cleaners were investigated. The typical models of each marker were selected in the study. The frequency and included voltage of EMI(electromagnetic interference) from each vacuum cleaners were measured by using electromagnetic receptor. As the result, we were found that the vertical deflection frequency and induced voltage is about 1~8[㎒] and 6~20[㏈㎶] respectively.

OA용 CRT 모니터의 유해 전자파환경 개선대책

김재이,고영권 동신대학교 환경연구소 2002 환경연구 Vol.7 No.1

오늘날 우리는 많은 정보통신 단말기, 사무자동화기기 그리고 측정기기를 사용하고 있다. 본 논문에서는 가장 대표적인 PA용 CRT 모니터에서 방출되는 유해전자파방출패턴을 조사하였다. 각 제작사의 대표적 모델이 본 연구를 위해 선정되었으며, 각 CRT로부터 방출되는 유해전자파의 유기전압과 주파수는 특별히 제작된 전자파수신기를 사용하여 측정 하였다. 연구결과로서, 메쉬방법을 이용한 EMI차폐 효과는 매우 안전하고 효과적임을 확인하였다. Nowadays, we are using many information and communication apparatus, office automation machinery and tools and measurement instruments. In this paper, various emission patterns of typical cathode-ray tubes were investigated. The typical models of each maker were selected in the study. The frequency and induced voltage of EMI(Electromagnetic interference) from each cathode-ray tubes were measured by using special electromagnetic receptor. As the result, we knew that the EMI shielding effect by mesh method is very effective and safe.

당뇨병성 신증 환자 20예에서 복합한약전탕액이 신기능에 미치는 영향

최우정,김동웅,신선호,이언정,최진영,신학수,조권일,이광석 대한동의생리학회,대한동의병리학회 2003 동의생리병리학회지 Vol.17 No.2

Diabetic Nephropathy is one of the major causes of chronic renal failure. It is a common microvascular complication and clinically defined as the presence of persistent Proteinuria. We studied the effects and change of the renal function of Complex Herbal medication of the 20Diabetic Nephropathy patients. We measured the initial levels of Total Protein, Creatinine Clearance Rate(Ccr), Serum Creatinine(Serum-Cr), Urine Creatinine(Urine-Cr) and HbA1C on admission and followed up the level changes of Total Protein, Ccr, Serum-Cr and Urine-Cr on discharge. The results are following : Complex Herbal Medication does not cause the renal toxicity. The longer hypertension period is, the higher Serum-Cr level and Urine-Cr level. In an older age group, Urine-Cr is lower. 4.From the "Deficiency in Origin and Excess in Superficiality(本虛表實)“points of view, Complex Herbal Medication improves the Serum-Cr in Diabetic Nephropathy patients. According to this results, it could be suggested that Complex Herbal Medication does not cause the renal toxicity in Diabetic Nephropathy patients and intensive controls of blood sugar, blood pressure and Complex Herbal Medication prevent the renal failure in Diabetic Nephropathy patients with early stage of Microalbumiuria.