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재생 폴리에텔렌의 기계적 성질 : 충격 보강재 효과에 대하여
계형산,강경민,박종훈,정융권,이상환 목원대학교 자연과학연구소 2002 自然科學 硏究論文集 Vol.11 No.2
본 연구는 재활용이 가능한 폴리에틸렌 필름 등에 비산회(Fly Ash) 등의 충진재를 사용하여, 신재와 물성을 비교하여 재생 PE의 재활용 가능성 및 사용 가능한 충진재의 종류를 알아보는데 그 목적이 있다. 또한 본 연구에서는 치합형 동방향 회전 이축 압출기(Fully Intermeshing Co-rotating Twin Screw Extruder)를 이용해서 재생 Polyethylene에 비산회 및 다양한 충진재(filler)를 첨가하여 ASTM에 의거하여 충격시편을 만들었고, 각 충진재의 무게비에 따른 충진재 충격 시험을 하였으며 Capillary Rheometer를 이용하여 유변학적인 성질을 분석해 보았다.
김종달,신말순,전형권 龍仁大學校 體育科學硏究所 1998 體育科學硏究論叢 Vol.8 No.1
The purpose of this study was carried to investiate the effects of a long term on blood lipid peroxidation. To achieve the purpose, a chain of experiments were carried out as the followings. First, sixty three Sprague-Dawley rats were randomly assigned into three group: the control group, the endurance training group, the endurance exhaustive group. 21 rats were exercised by endurance training and 21 rats were training in endurance exhaustive training for 12 weeks, but 21 rats were not exercised at all. Endurance training animals were trained 5 days per weeks, for 12 weeks, running for 1 hour at 20m/minute, 0% grade. Endurance exhaustive training animals were trained 5 days per weeks, for 12 weeks, swimming to physical exhaustion. Second, human subjects were randomly assigned to control and endurance training groups. 7 subjects were exercised by endurance training and 7 subjects were not exercised at all. Endurance training groups were trained 4 days per weeks, for 12 weeks, swimming for 2 hour. The trained and rested animals were sacrified for 48 hours after their last training session and sedentary control animals were sacrified at the same time of the day. In human, after their last training session, which was for 48 hours their blood was taken from antecubital vein for sampling. Following 8 weeks, 12 weeks training period, the rats and human were hematological analyzed by the changes of LPO(lipid peroxide: MDA). Statistical techniques for data analysis were One-way ANOVA training times(before, 8 week, 12 week) and two way repeated measure ANOVA to determine the differences among groups. The 5% level of significance was used as the critical level for acceptance of hypotheses for the study. The analysis of data revealed the following findings. There weren't any significant differences in the LPO among three groups following pre and 8 weeks training, but significantly lower in training groups than in control group 12 weeks training in rats. On the other hand, in human, there were no significant differences among three groups following pre training and 8 weeks training, but significantly lower in training groups following 12 weeks training.
조백기,박종갑,김형옥,김성욱,백승철,김진우,김시용,안규중,전재복,오지원,김낙인,이규석,오칠환,김수남,김상태,손숙자,신용우,김동석,이원우,권경술,서대헌,황규왕,이종석,고재경,강원형,정기양,최응호,김기홍,박석돈,강승주,함정희,명기범,김방순,구상완,김병수,원영호,김한욱,송은섭,정병수,노병인,홍창권,박장규,한지윤,김광중,구대원,김종민,김재홍,유희준,양경미 대한의진균학회 1998 대한의진균학회지 Vol.3 No.2
Background: Onychomycosis, especially toenail onychomycosis has become one of the common fungal infection and has historically been regarded as a cosmetic rather than medical problem by many patients, even by physicians. Recently, however, there are several reports that is a refractory disease which may cause a deleterious effect on patiets quality of life (QOL). Objective: The purpose of this study was to investigate the impact of toenail onychomycosis on QOL in Korea and to assess the chandes of QOL after treatment. Methods: Total 1004 patients with toenail onychomycosis which was confirmed by clinical findings and KOH preparation were were enrolled at 47 dermatologic centers in Korea, and interviewed with standardized QOL questionnaire before and after sytemic antifungal treatment. Responses to the questionnaire were scored by 5-point scale (1∼4) and averaged, and were analyzed for 5 dimensions of emotional impact, social impact, symptorn and functional impact, patients views concerning treatment, and relationship with doctor. Results: 1. Before and after treatment, the most serious impact was emotional dimension showing 1.90 and 1.30 in average score (AS), and social (AS: 1.14 and 0.83) and symptom and functional impact (AS: 1.05 and 0.92) was also affected. 2. In female rather than male, statistically more significant impact on patients QOL was observed in all dimensions. 3. After treatment, 3 of 5 dimensions were improved significantly - emotional dimension (AS : from 1.90 to 1.30), social dimension (AS: from 1.14 to 0.83), patients view concerning treatment (AS: from 1.34 to 1.02). 4. The drgree of patients satisfaction at the therapeutic effect was very high- 62.4% (immediately after treatment) and 65.8% (9 months affer initiation of treatment) of patients answered excellent or good. Conclusion: This study confirms that toenail onychomycosis has significant impact on the overall QOL of patients. Also the effect of antifungal therapy on patients QOL were watisfactory. Therefore, both doctor and patient should pay more attention to the treatment of onychomycosis. [Kor J Med Mycol 3(1): 115∼124]