머리염색이 인체에 미치는 영향

윤형식,황성호,이현륭,김수호,박연석,권낙현,정호진,김동훈,노현주,홍성호,박병찬,이관,정해관 東國大學校醫學硏究所 2002 東國醫學 Vol.9 No.1

일상생활에서 모발염색은 흔히 접할 수 있는 미용의 한 종류로 특히 젊은층을 중심으로 폭발적으로 유행하고 있다. 염색을 위항 사용하는 약제는 표백제와 발색제 등 각종 화학약품이 사용되고 있으나 이로 인한 건강장해에 대한 연구는 그리 많지 않다. 저자들은 염색이 인체의 모발건강에 미치는 영향을 파악하기 위하여 염색과 관련된 주관적 증상과 모발의 변화에 대한 실험적 연구를 시행하였다. 동국대학교 경주 캠퍼스 재학생 80명을 대상으로 설문조사를 시행하여 염색 유 ·무 및 염색 후에 경험한 증상에 대해 설문 조사하였고, 의과대학 재학생 46명을 대상으로 피부 반응 테스트를 실시하였다. 또한 염색 전후의 모발 탄성도를 측정하였고 모발의 상태를 파악하기 위해 전자 현미경검사를 실시하였다. 설문조사 결과 염색 전에 비하여 염색 후 안구혼탁, 안구건조, 시력저하, 발진 및 접촉성 피부염, 모발손상, 모근손상 등의 증상을 더 많이 경험한다고 호소하였다(p<0.05). 모발손상과 모근손상은 헤어드라이어 사용 빈도에 따라 증가하는 것으로 조사되었다(p<0.05). 피부반응검사에서 가려움증이 가장 많은 증상이었으며 이는 여성보다는 남성에서 높은 것으로 조사되었다. 염색 전후의 모발장력은 염색 전 134.5±10.37g, 염색 128.0±30.69g, 염색 이틀 후 112.5±19.69g으로 나타났다. 염색 전후의 모발의 전자현미경 케라틴 층이 현저히 감소하고 모발이 가늘어지는 차이를 보였다. 염색은 모발손상, 모발 케라틴 손상 및 모근 손상, 발진 및 접촉성 피부반응, 안구혼탁, 안구건조, 시력 저하를 유발한다. 따라서 염색약으로 인한 손상에 대한 주의와 예방이 필요하다고 생각한다. 예방대책으로 염색 전 피부테스트를 통한 적합성 여부를 판단하는 것이 필요하며 가급적 염색을 피하는 것이 좋을 것이다. 염색약에 발암물질이 포함되어있다는 보고도 있어 염색 제조사의 철저한 실험과 염색 물질의 선별이 염색으로 인한 부작용을 최소화하는데 중요한 역할을 할 것이다. Hair coloring has became one of the most popular cosmetic activities to younger generations during last decade. However, there are few studies on the health effect of widespread use of chemical dyes. This study was conducted to study the effects of hair coloring dye on hair and other systems. We conducted a questionnaire survey of 80 persons in Kyongju campus, Dongguk University. We have done open patch skin test on 46 medical students. We also conducted scanning electron microscopy to examine the hair strength and structure before and after hair coloring process. Injury of hair and hair bulb, contact dermatitis, turbid eyes, xerophthalmia, and poor visual acuity were the main symptoms complained after hair coloring (p<0.05). Injury of hair and hair bulb were increased by frequency of hair-dryer use(p<0.05). In open patch test, pruritus was complanined by more than half of the subjects. Mean strength of hairs before and after hair coloring was as follows; 134.5 (SD 10.37)g before hair coloring, 128.0 (SD 30.69)g immediately after hair coloring, and 112.5 (SD 19.69)g after two days. The scanning electron microscopic findings of hair surface before and after hair coloring showed decreased keratin layer and thinning of the hair. Hair coloring induces injury to hair, its keratin layer, and hair bulb as well as contact dermatitis, turbid eyes, xerophthalmia, and poor visual acuity. Therefore, we think that precaution is needed in use of hair coloring dye. To prevent complications induced by hair coloring dye, it is necessary, especially to those with allergy or skin disorders, to perform skin test before action and avoid hair coloring whenever possible. Longterm health effects of hairdye should be studied and manufacturing companies should try to minimize complications induced by hair coloring dye.

근접센서를 이용한 자동 두께 측정 시스템

주해호,박현제,정길도,이재원 嶺南大學校 工業技術硏究所 1994 工業技術硏究所論文集 Vol.22 No.2

This paper describes the automatic thickness measurement of the surface grinder for a grinding wheel by application of a proximity sensor, a limit switch, and PLC. The control system is designed to provide feeding a workpiece on the turn-table and pressing it by the upper disk automatically. In the process, the automation of checking the thickness of a grinding wheel is most important. In order to measure the relative displacement, the proximity sensors were employed and the sensitivities of the sensors were investicated and discussed the superiority. It has been shown by model experiment that the automation system of the surface grinder is performed satisfactory.

결핵 환자의 치료 순응도 향상을 위한 자기 간호교육의 효과

오영주,전진호,손혜숙,이종태 인제대학교 백병원 2002 仁濟醫學 Vol.23 No.2

Objectives : Good compliance to standard guideline might be the most important factor for success of tuberculosis treatment. This study was performed to propose the way to promote the compliance through evaluating the effect of self-care education in pulmonary tuberculosis treatment. Methods : The subjects were 100 patients(male 82, female 18) admitted in the national tuberculosis hospital, and study period was from December 1, 2000 to March 31, 2001. Study method was a direct interview survey with questionnaire that consisted of knowledges, attitudes, compliances about tuberculosis treatment, and some characteristics of subjects. The pre- and post-educational data were compared by chi-square test and paired t-test using SPSS(ver 10.0) with α-error=0.05. Results : The mean age of the subjects was 41.8±12.8years, and most of them was male. Half of them was still drinking and smoking, and the tuberculosis treatment categories of WHO was categoryⅢ 42%, categoryⅣ 22%, categoryⅡ 21%, categoryⅠ 15% when admitted. Average prevalent period was 56.8 months, and 68% of them showed positive sputum smear test. The average knowledge level was increased from 6.88±1.85 when admitted, and 8.02±1.57 when two months after(p〈0.001), that means, the effect of education was recognized. In contrast, recognition and attitudes showed no difference. And, the frequency of subjective aggravation was higher in the group of low compliance: voluntary medication stop(p=0.022). Conclusions : This study had some limitations; lack of representativeness because the subjects were limited to the patients in one tuberculosis hospital, and, not sufficient sample size etc. Nevertheless, because the effect of the education was partly recognized, to enhance the effect of tuberculosis treatment, the contents of self-care education would be changed toward the practice with a close monitoring of the patients' compliance.

Retinoic Acid가 흰쥐 태자 혀조직의 분화와 Laminin 합성에 미치는 영향에 대한 연구

김혜주,정호삼,서윤경,백두진,김원규,윤지희,이방헌 대한췌담도연구회 2000 대한췌담도연구회지 Vol.5 No.4

지방 국립대학의 우수학생 유치방안에 관한 연구 : 부산대학교를 중심으로

이원호,안창규,정영홍,황해익,주철안 釜山大學校 敎育硏究所 1992 敎育硏究 Vol.2 No.1

Korean universities have developed rapidly since its liberation from hapanese rule in 1945. Korean higher education system has contributed to the socio-economic development of the country. However, Korean higher educational system has some problems. One of the problems is its unbalanced development of higher educational institutions between the capital city and other cities. Koreans traditionally regarded highly colleges and universities in the capital city. The government including private foundations have invested large resources in building colleges and universities in cities and providences had been neglected. However, colleges and universities play crucial role in the local, regional development of the country. It is important to raise academic quality of the colleges and universities in non-capital cities. The quality of colleges and universities depended primarily on faculty, finance, etc. Therefore, it is an imperative condition to recruit academically excellent students for the development of colleges and universities in non-capital cities. Three research questions have guided the research. 1) How the college entrants' academic performance has changed. 2) What colleges and universities have utilized admission policy to recruit excellent students. The research has found out the following results. 1) The academic performances of college entrants in non-capital city were lowered in the 1980s. 2) Colleges and universities have emphasized the academic excellence, which is primarily related to research and academic activities of the faculty. 3) High school students and teachers in Pusan city give local university lower rate than what it is The findings suggest that local college and university make sustained, ststematic efforts in order to develop its status among the institutions. The efforts should include short-term and long-term policies : 1) Marketing activities about scholarship programs, graduates' career prospects, facilities, and the faculty etc. 2) Hiring excellent faculty members 3) Strengthening graduates' gaining job 4) furnishing required facilities and making attractive campus 5) Upgrading the quality of academic and research activities

심첨부 비후 심근증에서 심근 내 미세 관상동맥의 혈류 예비력 평가 : 경흉부 도플러 심초음파를 이용한 연구 Study Using Transthoracic Doppler Echocardiography

윤호중,박철수,신재원,임상현,조은주,정해억,전희경,오용석,정욱성,김재형,최규보,홍순조 대한순환기학회 2004 Korean Circulation Journal Vol.34 No.3

優先順位를 附與한 ATM 멀티캐스트 스위치의 呼處理 構造에 關한 硏究

황성호,오주현,임해진 三陟大學校 1999 論文集 Vol.32 No.1

An ATM multicast switch which can effectively accommodate diverse classes of traffic, is the core component of broadband ISDN. In this paper, we proposed a new call scheduling algorithm assigning priority according to the quality of service under the diverse traffic environment in multicast switch. The algorithm presented in this paper is using unfairness of switch structure, and delay-sensitive traffic may be given the high priority such that it can be transmitted as soon as possible. Also, we proposed a new hardware structure for the algorithm which can be constructed with combinational logic gates and it is beneficial for high-speed operation and VLSI implementation. The results of simulation for performance evaluation show that mean waiting time of delay-sensitive call is considerably reduced.

미세혈관 협심증 환자의 임상상 및 지표에 관한 연구

박상호,온영근,김현정,이태훈,길효욱,김현건,박수진,송해정,한대희,방덕원,신원용,이내희,김성구,권영주 순천향의학연구소 2003 Journal of Soonchunhyang Medical Science Vol.9 No.1

Background : Microvascular angina or syndrom X is heterogenous and encompasses different pathogenetic entities. Several studies suggest that microvascular angina have good prognosis and occurs predominantly in postmenopausal women. Lipoprotein (a), total cholesterol, LDL-cholesterol, HDL-cholesterol, triglyceride, homocystein, CRP and fibrinogen are the independent risk factor of acute coronary syndrome and are the chief underlying cause of atherosclerosis. We investigated clinical characteristics and markers in patients with microvascular angina. Methods : We studies 23 patients diagnosed with microvascular angina and 16 control group with negative treadmill exercise test and no significant coronary angiogram. We investigated clinical characteristics in patients group and evaluated symptom during a follow-up period of 4.2± 2.5 month. Exercise time in treadmill exercise test was compared between patients and control group. We assessed the level of markers, such as lipoprotein (a), total cholesterol, LDL-cholesterol, HDL-cholesterol, triglyceride, homocystein, CRP and ESR in two groups. Results : There is no difference in age between two groups. Patients group had a tendency to increase in female, hypertension, DM, and smoking history, but there was no statistical significance difference. Exercise duration time was significantly decreased in patients with microvascular angina (p<0,05). Serum lipoprotein (a), total cholesterol, LDL-cholesterol, HDL-cholestrol, Triglyceride, ESR, Fibrinogen and Homocystein value were no significant difference between microvascular angina and control group. Only CRP was significantly high in patients with microvascular angina (p<0.05). Conclusion : There was no statistical significance difference in age, sex, hypertension, DM and smoking history between two groups but patients group had a tendency to increase the prevalence in hypertension, DM and smoking history, female. Also, Symptom improvement and disappearance in follow-up was presented in 11 patients of 19(57.9%). Exercise tolerance was worse in patients group than control group. CRP value was significantly higher in patients group than control group. There was no statistical significance difference in lipoprotein (a), total cholesterol, LDL-cholesterol, HDL-cholesterol, triglyceride, homocystein, ESR and Fibrinogen between two groups.

일차성 식도이완불능증의 풍선확장술후 치료효과의 객관적 평가지표

손영해,나호영,조성범,주영은,김현수,최성규,유종선,김세종 全南大醫大 2001 전남의대학술지 Vol.37 No.2

성형입력에 의한 유연한 조작기의 잔류진동제어

이재원,이지형,주해호 嶺南大學校 工業技術硏究所 1995 工業技術硏究所論文集 Vol.23 No.2

This paper discusses the control of one link flexible robot which can run in high speed with no residual vibration. The preshaped input command is produced by convoluting the impulse sequence with the step command. The impulse sequences is produced by Singer's method and Tuttle's method. The result show that Tuttle's method is more simple in terms of mathematical modeling and more general in terms of producing impulse sequences than Singer's method.