Classification과 Ordination에 依한 俗離山 森林群集의 分析

兪在殷,宋鎬京 忠南大學校 環境問題硏究所 1989 環境硏究 Vol.7 No.-

Vegetational data from Mt Sokri in central Korea were analysed in relation to 17 environmental variables. Two multivariate methods were applied two-way indicator species analysis (TWINSPAN) for classification and detrended canonical correspondence analysis (DCCA), a recent technique which extracts ordination axes that can be related to environmental factors. The relationship between the distribution of dominant species of forest vegetation and soil condition in Mt Sokri was investigated by analyzing altitude and soil nutrition gradient. Quercus mongolica forest was distributed in the high altitude and good nutrition area, Quercus serrata-Acer pseudo-sieboldianum forest in the medium altitude and good nutrition area, Quercus variabilis and Quercus serrata forest in the medium altitude and medium nutrition area, and Pinus densiflora forest in the low altitude and poor nutrition area. Quercus mongolica forests were distributed in the xeric parts of northern part of warm-temperate deciduous boardleaf forest and in the mesic parts of cool-temperate deciduous boardleaf forest in Korea. The dominant compositional gradient related to altitude.

피질하 혈관성 치매 환자에서 협착성 뇌혈관 병변의 의의 : 자기공명 혈관조영술과 양전자방출단층촬영을 이용한 연구 MR Angiography and ^(18)FDG-PET Study

유경호,이병철,마효일,김윤중,정지향,나덕렬,강연욱 대한치매학회 2004 Dementia and Neurocognitive Disorders Vol.3 No.1

Background and Objective:Subcortical vascular dementia (SVD) incorporates small vessel disease as the primary vascular etiology, represents in MRI by lacunar infarct and deep white matter lesions. In clinical practice, a number of SVD patients present with various vascular risk factors for large artery disease (LAD) i.e., old age, hypertension, and diabetes. However the current diagnostic criteria for SVD did not include angiographic findings as a key feature. Therefore we tried to find out the frequency of large artery disease in SVD and to elucidate whether the presence of LAD affects clinico-radiological manifestations of SVD. Methods:Thirty three patients fulfilling 'Research criteria for SVD' by Erkinjuntti from 17 study centers were recruited. Of these 33 patients, 21 who underwent comprehensive neuropsychological test battery, MRI ^(18)FDG-PET, and MR angiography were classified into two subgroups according to the patterns of MRI abnormality:white matter dominant (WM) type (n=5) and multiple lacunar (LC) type (n=16). Clinical and neuropsychological profile and ^(18)FDG-PET findings of 21 SVD patients with and without LAD were compared. Results: Twelve (57%) of 21 SVD patients had mild stenotic lesions in intracranial large arteries:4 in middle cerebral artery, 8 in posterior cerebral artery, and 4 in vertebrobasilarj artery. There were no differences in vascular risk factors, characteristics of cognitive dysfunctions, and ^(18)FDG-PET findings between SVD with and without LAD. Conclusions:Our results showed that the presence of mild degree of large artery stenosis did not affect the clinical., neuropsychological profile and cerebral metabolism in PET. Therefore, the current 'Research criteria for SVaD' by Erkinjuntti could be used to diagnose SVD as a homogenous clinical group regardless of angiographic abnormalities.

Metachromasie에 依한 海苔中 多糖類黃酸의 檢索

劉炳淑,李鎬順,洪璟珠 梨花女子大學校 藥學硏究所 1961 梨花藥學硏究 Vol.- No.2

뇌졸중 후 발생한 괴잉성욕에 대한 Cimetidine의 치료효과 : 증례보고

유경호,마효일,정승철,이병철 대한치매학회 2002 Dementia and Neurocognitive Disorders Vol.1 No.1

Most studies have agreed that there is a considerable decline in sexual activity following stroke. but the hypersexuality after stroke as a relatively isolated behavioral abnormality has been less frequently reported Hypersexuality has no proven treatment, although reports have described reductions in hypersexual behavior did not response to three medications were not uncommonly observed in clinical practice A 65-year-old right-handed male presented with acute left hemipararesis. His MRI showed a right middle cerebral artery infarct involving the temporal, parietal regions and the basal ganglia. Four weeks after stroke he showed abnormal behavior, such as incessantly holding and hugging the nursing staff without assent, but no increased orality or change in eating habits But several weeks after taking cimetidine. a histamine H₂-receptor antagonist. his sexual behavior showed a marked improvement This case demonstrates that cimetidine as a non-hormonal anti-androgenic effect decreased libido and hypersexual behavior without serious side effects in patients with cognitive decline after stroke Further studies that obviously define the response and long-term side effects of cimetidine are needed to confirm our observations.

구치부 2급와동에 있어 심미성 수복물의 변연접합도에 관한 연구

유미경,이광원,손호현 全北大學校 齒醫學硏究所 1993 전북치대논문집 Vol.11 No.1

The purpose of this study was to evaluate the cervical marginal adaptation of direst composite resin, composite resin, composite resin inlay and porcelain inlay technique. 40 cavities of class Ⅱ were prepared 40 extracted maxillary premolr teeth, which were divided into four groups. Group 1 : restored by direct filling method(P50) Group 2 : restored by direct filling method(Z100) Group 3 : restored by resin inlay method(Estilux posterior CVS) Group 4 : restored by procelain inlay method(Vita-dur N) All the specimens were embedded into stainless steel mold after thermocycling between 5℃ and 55℃. Phototaking under microscopic image and measuring the marginal gap on the photographs and statistical analysis were peformed Specimens from each group were cut mesio-distally and observed under SEM. The results were as follows : 1. The groups restored by inlay method showed significantly less marginal gap than groups restored by direct filling method(P<0.05). 2. There was no significant difference in marginal gap between composite resin inlay group with porcelain inlay group(P>0.05). 3. The group restored by direct filling method(Z100) showed significantly less marginal gap than group restored by direct filling method(P5O)(P<0.05). 4. SEM examination indicated that direct composite resin groups were larger gaps(10- l5μm) than groups(2-5μm).

수술후 경막외강에 주입한 ketamine의 진통효과에 관한 연구

정기호,조남수,임경준,유병식,정종달,김용일 朝鮮大學校 附設 醫學硏究所 1993 The Medical Journal of Chosun University Vol.18 No.1

Author divided 60 patients who got lower abdomen or lower extremity surgical operation into three groups. Each group consisted of 20 patients. We injected ketamine 10㎎, 20㎎, and 30㎎ respectively into the epidural space when the patient complained of pain postoperatively and observed the postoperative analgesic effect of ketamine. Finally, we concluded the following : 1) The onset time of analgesic effect. : The analgesic effect appeared within 10 minutes in 3 groups and the significant difference among them was not seen. 2) The duration of analgesic effect : The duration of analgesia was relatively short with less than 1 hour on an average in all 3 groups and was not constant. 3) Cardiopulmonary system. : The significant change of blood pressure, pulse and respiratory rate was not seen in all three groups and and the difference among them also was not seen. 4) Side effects. : Sedative action(16%), nausea(10%), dizziness(5%), headache(3.3%) From above results, the epidural administration of ketamine is not suitable for postoperative pain management because of a lot of side effects as well as short and inconstant duration of analgesic effeet.

동종 조혈모세포이식 후 발생한 크립토콕쿠스 척추염 1예

고윤호,임동준,이성수,조유경,이동건,최정현,김유진,민창기,김동욱,박정미,김춘추,신완식 대한감염학회 2001 감염 Vol.33 No.4

Skeletal cryptococcosis is an uncommon infection. Cryptococcus is a common cause of meningitis and infects 7∼10% of patients with AIDS. As well as AIDS, the infection may be seen in association with leukemia, lymphoma, Hodgkin's disease, sarcoidosis, tuberculosis and diabetes, also in patients on steroid medication. But there is no case report of skeletal cryptococcosis following allogeneic hematopoietic stem cell transplantation. A 40-year-old woman was admitted to the hospital because of low back pain. She had chronic myelogenous leukemia for 2 years and underwent allogeneic hematopoietic stem cell transplantation 8 months ago. She have been treated with steroid and cyclosporine orally because of chronic graft versus host disease. On examination she was afebrile and had posterior lower lumbar tenderness. But, she had no reduced strength of low extremities. Open biopsy was underwent. Histology demonstrated budding, round-to-oval, refractile yeast-like organisms within debris. The results of a lumbar puncture were unremarkable and cerebrospinal fluid culture failed to grow bacteria and yeast. The patient was treated with amphotericin B (1 gram) and AmBisome□ (2.8 gram) over 6 weeks. Three months after cessation of therapy, the patient was doing well.(Korean J Infect Dis 33:298∼301, 2001)

주야 교대 근무가 편두통에 미치는 영향 : 한림대학교 의료원 간호사 연구 Hallym Medical Center Nurse Study

주민경,유경호,마효일,김윤중,김주용,송흥기,이병철 대한두통연구회 2004 두통 Vol.5 No.1

충수돌기에 발생한 비호지킨 림프종 1예

정유경,이미숙,김윤식,이미자,전호종 조선의대 1995 The Medical Journal of Chosun University Vol.20 No.2

다중회귀모형을 이용한 수완부 골성숙도의 추정에 관한 연구

김경호,유형석,김석현 대한치과교정학회 1997 대한치과교정학회지 Vol.27 No.5

성장의 잠재력에 대한 평가는 개체의 성숙도를 나타내는 여러 생리학적 지표(physiologic indicators)들에 의해 이루어지며 그 중 골성숙도(skeletal maturity)는 성적성숙도(sexual maturity)와 신장의 성장변화와 밀접한 관계가 있는 것으로 알려져 있으나, 치아발육과의 상관관계에 대해선 논란이 많은 실정이다. 그러나 최근의 연구에 의하면 하악견치를 포함한 일부치아의 발육이 골성숙도와 밀접한 관련이 있는 것으로 알려져 있으나, 치아발육과의 상관관계에 대해선 논란이 많은 실정이다. 그러나 최근의 연구에 의하면 하악 견치를 포함한 일부 치아의 발육이 골성숙도와 밀접한 관련이 있는 것으로 보고된 바 있다. 이에, 본 연구에서는 7세에서 15세까지의 한국인 남, 녀 아동 387명의 수완부 방사선 사진과 파노라마 사진을 이용하여 Fishman방법과 Greulich와 Pyle방법에 의해 골성숙도을 평가하였으며 변형된 Demirjiran방법에 의해 치아의 성숙도를 평가하여, 수완부 방사선의 사진의 도움 없이 골성숙도를 추정할수 있는 방법을 구하고자 다중회귀모형을 이용한 수완부 골성숙도의 추정에 관한 연구를 시행하였으며 다음과 같은 결론을 얻었다. 1. 골성숙 지수의 추정을 위한 아래의 다중회귀모형은 84%의 설명력을 나타내며 연대연령, 성별, 하악 견치의 회귀계수는 통계학적 유의성을 보였다. 골성숙지수 = 0.60x 연대연령 -1.67x성별 + 0.88x하악견치 - 0.05x하악 제2대구치 -10.3 2. 골연령의 추정을 위한 아래의 다중회귀모형은 87%의 설명력을 나타내며 연대연령, 성별, 하악 견치의 회귀계수는 통계학적 유의성을 보였다. 골연령 = 0.75x 연대연령 - 0.55x성별 + 0.71x하악 견치 + 0.09x하악 제2대구치- 5.77 (성별: 남자=1, 여자=0., 하악견치, 제2대구치 : 각 발육단계별 평균연령) The evaluation of growth potency can be done with many physiologic indicators. It has been well known that skeletal maturity has a close relation with both sexual maturity somatic maturity, but the correlation between skeletal maturity and dental maturity was believed to be less certain. But, recent studies show that specific teeth, including lower canines, present close correlations with skeletal maturity. So, in this study, we study, we studied hand-wrist X-ray films and orthopantomograms of 387 Korean boys and girls aged from 7 to 15; the purpose was to determine skeletal and dental maturity, and to find out a new method to estimate individual skeletal maturity using multiple-regression model, without the help of hand-wrist X-ray film. As a result of this study, followings were observed. 1. The following multiple-regression model can estimate skeletal maturity index(SMI) with 84% of accuracy, and regression coefficient of chronologic age, sex and lower canine show statistical significance. SMI = 0.60 x chronologic age - 1.67 x sex** + 0.88 x lower canine* - 0.05 x lower 2nd molar* - 10.3 *: mean age corresponding each developing atage, **: male= 1, femal = 0 2. The following multiple-regression model can estimate skeletal age with 87% of accuracy, and regression coefficient of chronologic age, sex and lower canine show statistical significance. Skeletal age = 0.75 x chronologic age - 0.55 x sex** + 0.71 x lower canine* - 0.09 x lower 2nd molar* - 5.77 *: mean age corresponding each developing atage, **: male= 1, femal = 0