서울시 수도수 중의 위생물학적 조사연구

조영채 한국환경보건학회 1981 한국환경보건학회지 Vol.7 No.1

This study was carried out to investigate Water Temperature, Residual Chlorine, Coliform Groups, and the Standard Plate Counts of Water Supply Areas provided by 7 Water Purification Plant (W.P.P) in Seoul from September 20, 1979 through October 20, 1979. The results were summarized below: 1) The mean water temperature of the 63 Water Samples was 19.8$\circ$C, the mean pH 7.18, and the mean residual chlorine concentration 0.52 ppm by each Water Supply Areas. There is no statistically significant differences between the WPP Areas, but there is significant differences between water supply areas. 2) 30(47.6%) out of the 63 Water Samples were Standard Plate Counts free and 33 Samples (52.4%) were contaminated by Standard Plate Counts. 30 (47.6%) out of 33 samples showed the existence of Standard Plate Counts less than 15 and the other 3 samples 15-30. 3) 2 (3.2%) out of the 63 Samples had the coliform. Those 2 Samples had 2 and 6 coliform group counts per 50ml respectively both of them were 0.1ppm in residual chlorine. 4) There is correlation among Water Temperature, pH, Residual Chlorine, Standard Plate Counts, and Coliform Groups. The Coefficient of Correlation(r) between Water Temperature & Residual Chlorine was 0.147, 0.240 between Water Temperature & Standard plate Counts and 0.215 between pH & Standard Plate Counts. These correlations are statistically no significant, But the correlation of coefficient between pH & Residual Chlorine was -0.291 which is showed significant correlation at p<0.05. The coefficient of correlation between Residual Chlorine & Standard Plate Counts was -0.441 which is showed Negative Correlation Statistically Significant difference at p<0.01.

탈구된 인공수정체 재고정술과 공막내고정술을 이용한 인공수정체 교환술 임상결과 비교

조영채,박정민 대한안과학회 2020 대한안과학회지 Vol.61 No.7

Purpose: To investigate the clinical outcomes of refixation of a dislocated intraocular lens (IOL) and IOL exchange with intrascleral fixation. Methods: We performed a retrospective study of 90 patients (91 eyes) who underwent refixation or exchange of IOLs from January 2014 to April 2019. The patients were divided into an ab externo scleral refixation group (group 1), an intrascleral refixation group (group 2), and an exchange with intrascleral fixation group (group 3). We evaluated the best-corrected visual acuity (BCVA), spherical equivalent, cylindrical power, intraocular pressure, and postoperative complications. Results: The BCVA was 0.10 ± 0.17 (group 1), 0.15 ± 0.29 (group 2), and 0.31 ± 0.52 (group 3) at 6 months after surgery. The BCVA change in group 3 was significantly greater than that in groups 1 and 2 (p = 0.018 and p = 0.046, respectively). The final BCVA was not significantly different among the groups (p = 0.422). The spherical equivalent was -1.26 ± 1.72 diopters (D) (group 1), -1.32 ± 2.09 D (group 2), and -0.17 ± 1.58 D (group 3) at 6 months after surgery, showing that group 1 and group 2 were more myopic than group 3 (p = 0.004 and p = 0.001, respectively). Haptic slippage was the most common complication. Conclusions: Refixation of dislocated IOLs and IOL exchange with intrascleral fixation did not differ significantly in terms of the final visual outcomes. Refixation was associated with more myopia and a higher risk of IOL dislocation or haptic slippage than exchange. 목적: 탈구된 인공수정체 재고정술과 공막내고정술을 이용한 인공수정체교환술에 대한 임상결과를 알아보고자 하였다. 대상과 방법: 2014년 1월부터 2019년 4월까지 탈구된 인공수정체 재고정술 또는 인공수정체교환술을 시행한 환자 90명(91안)을 대상으로 후향적 연구를 진행하였다. 기존 인공수정체로 외부 공막고정술을 시행한 군(1군), 기존 인공수정체로 공막내고정술을 시행한 군(2군), 공막내고정술을 이용한 인공수정체교환술을 시행한 군(3군)으로 나누어 최대교정시력, 구면렌즈 대응치, 난시값, 안압 및 합병증을 관찰하였다. 결과: 최대교정시력(logMAR)은 수술 6개월 후 1군에서 0.10 ± 0.17, 2군에서 0.15 ± 0.29, 3군에서 0.31 ± 0.52로 향상되었다. 최대교정시력의 변화는 1, 2군보다 3군에서 유의하게 높았으나(p=0.018, p=0.046), 최종 최대교정시력은 유의한 차이가 없었다(p=0.422). 구면렌즈 대응치는 수술 6개월 후 1군에서 -1.26 ± 1.72 diopters (D), 2군에서 -1.32 ± 2.09 D, 3군에서 -0.17 ± 1.58 D로 근시화되었고, 3군보다 1, 2군에서 유의하게 더 큰 근시값을 보였다(p=0.004, p=0.001). 합병증 중 지지부 미끄러짐이 가장 많았다. 결론: 탈구된 인공수정체 재고정술은 인공수정체교환술과 비교하여 최종 최대교정시력에서 유의한 차이가 없었다. 인공수정체교환술보다 재고정술에서 더욱 근시화되는 경향이 있었고, 인공수정체 탈구 또는 지지부 미끄러짐의 위험이 높았다.

첩대요법으로 호전된 요추 추간판탈출증 환자 1례 보고

조영채,이시형,조태영,이병이,진성순,임형호,Cho, Young-Chae,Rhee, See-Hyung,Cho, Tae-Young,Lee, Byeong-Yee,Jin, Sung-Soon,Lim, Hyung-Ho 척추신경추나의학회 2006 척추신경추나의학회지 Vol.1 No.1

Objectives : The objective of this study is to evaluate the treatment effect of Taping therapy in Herniation of Inter-Vertebral Disc. Methods : Taping therapy were performed for 31 days ambulatory care in a patient who had Herniation of Inter-Vertebral Disc. Results : Physical examination of Lumbar Spine has improved, VAS were also decreased. Conclusion: Taping therapy were effective in reducing the symptoms. We think that it need the further study and clinical trial for Herniation of Inter- Vertebral Disc.

일부 대학생의 자가 판단에 의해 사용하는 일반의약품에 대한 지식, 인식태도 및 사용실태와 관련요인

조영채,양혜경 한국보건교육건강증진학회 2007 보건교육건강증진학회지 Vol.24 No.2

on their own judgment and the relevant factors having impact on them. Methods: The questionnaire survey was conducted by visiting the students in 3 colleges in Daejeon and Chungcheongnam-Do. 792 students were finally selected as the subjects. The results were statistically analyzed using the SPSSWIN(ver 13.0) and x2-test, ANOVA and multiple regression analysis were conducted. Results: The usage status of college students showed the significant difference by general features, knowledge and recognition attitude. The knowledge level of students on the general drugs was very low. They had excessive expectation on the general drugs in terms of the recognition attitude. The lowest factor was the distrust on the general drugs. 27.5% of subjects was satisfied with the effect after using 48.1%m when the drugs were frequently used. Those who experienced the side effects accounted for 9.6%. In accordance with the analysis on the factors related to the knowledge on, recognition attitude on and usage status of general drugs, the education had the highest influence on the abuse and misapplication of drugs. For the mistrust factor on the drugs and negligence factor on abnormal response, the gender was the most influencing. The knowledge level was the greatest impact on the excessive expectation factor on the drugs. The factor that the usage status was the most influential was the education on the abuse and misapplication of drugs. Conclusions: The systematic approach including establishment of health policies for the improvement of health and health education activity should be implemented on the basis of the thorough analysis on the knowledge level and recognition on drugs and the factors influencing on the usage of drugs.

카드뮴에 폭로된 폐포된 폐포대식세포의 세포독성 평가를 위한 세포자계측정, LDH활성도 및 Apoptosis

조영채 한국환경보건학회 2000 한국환경보건학회지 Vol.26 No.4

To evaluate the cytotoxicity of cadmium compounds, this study was conducted to measure the in vitro magnetometry, LDH release and cellular apoptosis using alveolar macrophages of hamsters. A series of magnetometric measurements in cadmium-added groups showed a significant dose-dependent decay of the relaxation curves. The LDH release rates showed a dose-dependently increasing tendency as the dose gradually increased. The positive rates of apoptosis were significantly higher in cadmium-added groups than the control groups. Conclusively, the cytotoxicity increased in a dose dependent way as the concentration of cadmium added increased, which reflected in the decay of relaxation curve in magnetometry, and increased LDH release rate and positive rate of apoptosis.

산업장 근로자들의 연령과 건강습관에 따른 비만, 혈압 및 혈청지질의 특성

조영채,송인순 대한보건협회 2000 대한보건연구 Vol.26 No.2

This study was performed to monitor the characteristics of the levels of BMI, blood pressure and serum lipids(total cholesterol, triglyceride, HDL-cholesterol and LDL-cholesterol) according to age and health behavior in industrial workers. The subjects for this study were 3,981 industrial workers(male 2,467, female 1,514) who underwent medical examinations at a general hospital in Taejon City. We analyzed the data obtained from medical examinations and questionnaires for their health behavior from January 1, 1998 to December 31, 1999 BMI and blood pressure were lower at the age group of 20s' than those of any other groups of both sexes, and the sequential trends of those showed increasing patterns as the age increased. The level of total cholesterol, triglyceride and LDL-cholesterol were lowest at the age group of 20s'of both sexes, and those levels showed increasing patterns by 50s', but decreased at 60s'. The level of HDL-cholesterol was highest at the age group of 20s', and it gradually decreased by 50s', but thereafter increased at 60s'. In comparison of health practicing group with non-practicing group in terms of health behavior, BMI of non-practicing group was significantly higher than that of practicing group in both sexes. In male, blood pressure was higher in health practicing group than non-practicing group, but it was reversed in female. Total cholesterol and LDL-cholesterol were significantly higher in non-practicing group than in practicing group of both sexes, but they were reversed in the case of HDL-cholesterol. These results of this study suggested that age and health behavior is associated with BMI, blood pressure, and serum lipid levels. Therefore, we need to develop the new programme for the effective practice of health behavior.

Lactobacillus acidophilus 발효유가 cadmium투여된 흰쥐의 혈액상과 신장조직에 미치는 영향

조영채,전무형,장경수,Cho, Young-chae,Jun, Moo-hyung,Chang, Kyung-soo 대한수의학회 1994 大韓獸醫學會誌 Vol.34 No.4

To elucidate the protective effects of Lactobacillus acidophilus-fermented milk against cadmium toxicity, the effects of administration of L acidophilus-fermented milk on hematological values and histopathological changes in cadmium-treated rats were investigated. The experimental rats were divided into 2 groups that were consisted of the one group administered with cadmium alone, and the other group administered with cadmium mixed with the fermented milk. Each group was orally administered with different doses of cadmium such as $1.7{\mu}g/g$ bw/day, $3.4{\mu}g/g$ bw/day, $6.8{\mu}g/g$ bw/day, and $13.6{\mu}g/g$ bw/day, respectively, for 1 to 8 weeks. Hematological values and enzyme activities, histopathological changes of kidney tissues were examined for the experimental groups. The values of RBC, WBC, and Hb in the groups administered with cadmium mixed with the fermented milk showed no significant differences to those of the groups administered with cadmium alone, but Hct showed significant reducing values. The activities of glutamic oxaloacetic transaminase(GOT) and glutamic pyruvic transaminase (GPT) in serum were significantly reduced than those of the groups administered with cadmium alone, at the low dose of cadmium treated groups. But alkaline phophatase(ALP) and lactate dehydorgenase(LDH) were significantly reduced at the high dose of cadmium treated groups. In histopathological study, a severe acute tubular necrosis of the convoluted tubules and distalation of tubules were showed in the groups administered with cadmium alone, but the kidney tissues of the groups administered with cadmium mixed with the fermented milk were similar to those of the normal group. In conclusion, the above results would suggest that L acidophilus-fermented milk has reducing effects on cadmium toxicity, at the low dose of cadmium administration.

냉방환경 근무자의 냉방병 증상 실태조사

조영채 충남대학교 의과대학 지역사회의학연구소 1992 충남의대잡지 Vol.19 No.2

In order to evaluate the effect of cooling disorder symptoms, this study was conducted from the 418 workers employed in iar-conditioned buildings(case group) and 215 worder who worked in naturally ventiled buildings(control group). The thermal condition of indoor environment maintain the optimum condition in case group than control, but the complain rates of cooling disorder symptoms of "paresthesia of shoulder and back" "headache" and "upper respiratory infection symptoms" were higher in case group than control, whereas the symptoms of "easy fatigability" and "facial flushing" were higher in control group than case. The thermal condition of case group according to the air-conditioned types of carrier system and air-conditioned system were not statistically different, but the complain rates of cooling disorder symptoms were higher in an air-conditioned system than a crrier system. The rates of cooling disorder symptoms were significantly different from work hour and exposure time in an air-conditioned environment, and the correlation among the factors related the cooling disorder symptoms were significant negative correlation in age and positive correlation in work hour.

흡수성 치주조직 재생 차폐막에 대한 비교연구

조영채,정다연,이득용 한국결정성장학회 2023 한국결정성장학회지 Vol.33 No.2

Absorbable periodontal tissue regeneration barrier membranes (total 6; domestic 4; import 2) were comparatively analyzed. In the case of the xenograft barrier membrane, the collagen product had excellent tensile strength but low strain,and the porcine pericardial membrane had good mechanical properties, but its thickness was too thick to control. The synthetic PLLA membrane manufactured by the electrospinning had a relatively low water absorption capacity. However,the hybrid barrier membrane was able to control mechanical properties and biocompatibility through proper mixing of synthetic polymer and natural polymer. DA02 (PLLA/gelatin), a newly developed hybrid absorbable periodontal tissueregeneration membrane that is entirely dependent on imports, can be applied to an absorbable periodontal tissue regeneration barrier membrane due to suitable mechanical properties and biocompatibility. 흡수성 치주조직 재생유도재(국내 4개, 국외 2개) 총 6개 제품을 비교 연구하였다. 이종소재 차폐막의 경우, 콜라겐 제품은 우수한 기계적 강도를 보였으나 연신율이 작았다. 돼지심막은 우수한 기계적 물성에도 불구하고 두꺼운 두께로 사용에 제약이 되었다. 전기방사법으로 제조한 독일 PLLA/콜라겐 하이브리드형 복합 차폐막은 강도값과 흡수도는 낮았지만, 합성 및 천연고분자를 적절히 혼합함으로써 원하는 특성의 기계적 물성과 생체적합성 구현이 가능하였다. 본 연구에서 DA02(PLLA/젤라틴) 하이브리드형 복합고분자 소재는 기계적 물성과 생체적합성이 적절하여 100% 수입에 의존하는 하이브리드형 흡수성 치주조직 재생 차폐막에 적용이 가능하였다.

지연성으로 증상이 발현된 수정체 내 덱사메타손 삽입물

조영채,염명인,김상수 대한안과학회 2020 대한안과학회지 Vol.61 No.9

Purpose: To report a case of delayed symptoms after intralenticular dexamethasone implant (Ozurdex®; Allergan, Irvine, CA, USA). Case summary: A 65-year-old male was referred for myodesopsia and decreased visual acuity. A dexamethasone implant was located in the crystalline lens, and the lens showed mild nucleus opacity. The patient had been treated with multiple intravitreal injections of anti-vascular endothelial growth factor and had received an injection of dexamethasone implant about seven weeks before symptom onset. Based on the symptoms, phacoemulsification was performed and an intraocular lens was placed within the capsular bag. After surgery, symptoms improved. One month after surgery, as cystoid macular edema worsened, the patient was treated with an intravitreal injection of triamcinolone acetonide (MaQaid®; Wakamoto Pharmaceutical Co., Ltd., Tokyo, Japan). After intravitreal injection, cystoid macular edema improved. Conclusions: Intralenticular injection of the dexamethasone implant is very rare; however, great care should be taken during the procedure. It should be noted that the onset of symptoms by intralenticular dexamethasone implant may not occur immediately following the procedure. Thus, close follow-up is necessary, with the possibility of surgical intervention depending on visual acuity and underlying complications. 목적: 지연성으로 증상이 발현된 수정체 내 덱사메타손 삽입물(Ozurdex®; Allergan, Irvine, CA, USA) 1예를 경험하여 이를 보고하고자 한다. 증례요약: 65세 남자 환자가 우안 비문증과 시력저하를 주소로 내원하였다. 세극등현미경검사상 경도의 수정체핵 혼탁과 수정체 내덱사메타손 삽입물이 관찰되었다. 환자는 당뇨황반부종으로 수차례 유리체강내 혈관내피성장인자억제제 주사를 받았으며, 증상 발생 약 7주 전 덱사메타손 삽입물주입술을 받았다. 환자가 증상에 따른 불편감을 지속적으로 호소하여 수정체유화술과 후방인공수정체삽입술을 시행하였다. 수술 후 증상은 호전되었다. 수술 1개월 후 낭포황반부종이 악화되어 유리체강내 트리암시놀론 아세토나이드(MaQaid®; Wakamoto Pharmaceutical Co., Ltd., Tokyo, Japan) 주사를 시행하였다. 유리체강내 주사 후 낭포황반부종은 점차 호전되는 양상을 보였다. 결론: 수정체 내로 덱사메타손 삽입물을 주입하게 되는 경우는 매우 드물지만 시술 중 주의하여야 하며, 지연성으로도 수정체 내 덱사메타손 삽입물로 인한 증상이 발현될 수 있음을 인지할 필요가 있다. 따라서 면밀한 경과 관찰이 필요하며, 시력과 합병증에 따라 수술을 시행할 수 있다.