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.

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.

일부 농촌지역 노인들의 낙상발생과 관련된 요인

조영채(Young-Chae Cho),윤현숙(Hyun-Suk Yoon) 한국농촌의학 지역보건학회 2004 농촌의학·지역보건 Vol.29 No.2

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.

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.

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.

산업장 근로자들의 연령과 건강습관에 따른 비만 , 혈압 및 혈청지질의 특성

조영채(Young Chae Cho),송인순(In Soon Song) 대한보건협회 2000 대한보건연구 Vol.26 No.2

N/A N/A

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.

심혈관 위험요인과 청력역치의 상관성

조영채,이태용,이동배,정성필,김수영 大韓産業醫學會 1998 대한직업환경의학회지 Vol.10 No.2

To investigate the effects of cardiovascular risk factors on hearing loss, hearing threshold and cardiovascular risk factors such as blood pressure, hematologic values, and serum lipid levels of 3,827 persons who visited the Health Center of a University Hospital in Kumi for health examination from January 1, 1995 to July 31, 1997 were analysed. The results were summarized as follows; 1. Hearing threshold was shifted highly in both sex groups with age increased. Smoking did not influence increase of hearing loss, but drinking alcohol amount increased the hearing threshold when sex was adjusted. The most highly increased hearing threshold showed among farmers group, but next was blue collars group. Hearing threshold increasing basis with BMI increased. 2. Systolic and diastolic blood pressure and hematocrit value increased the hearing threshold in both sex groups, but hemoglobin value did not related to the hearing threshold. 3. Total cholesterol, LDL-cholesterol, triglyceride, and atherosclerosis index were significantly increased with the grade of hearing loss increased, when age was adjusted. 4. In the logistic regression analysis, the atherosclerosis index, age, and hematocrit value revealed risk factors which contributed in that orders, though the values were small they showed statistical significaces, but the risks were lowered when hemoglobin values increased, in both sex groups. Consequently, hyperlipidemia was significantly related to the hearing loss when age was adjusted.

종합건강검진 수검자들의 대사증후군 유병률 및 관련요인

조영채(Cho, Young-Chae),권인선(Kwon, In-Sun),박재영(Park, Jae-Young),신민우(Shin, Min-Woo) 한국산학기술학회 2012 한국산학기술학회논문지 Vol.13 No.11

본 연구는 대사증후군 및 대사증후군 진단기준 인자의 유병률을 파악하고, 인구사회학적 및 건강관련행위 요인과의 관련성을 검토하며, 진단기준 인자의 군집화를 통해 대사증후군 위험의 분포를 분석하고자 하였다. 조사는 한 대학병원 건강검진센터에서 종합건강검진을 받았던 30세 이상의 지역주민 1,388명을 대상으로 허리둘레, 중성지 방, 고밀도지단백콜레스테롤, 수축기혈압, 확장기혈압, 및 공복 시 혈당 등 대사증후군 진단기준 인자를 측정하였다. 분석은 이들 대사증후군 위험인자에 대한 유병률을 파악하고 위험인자의 군집화를 통해 대사증후군 위험의 분포를 파악하였으며, 관련요인에 따른 대사증후군의 위험비를 구하였다. 연구결과 조사대상자의 대사증후군의 유병율은 21.7%로 나타났으며, 대사증후군 위험인자별 유병률은 HDL-C, 혈압, TG, 허리둘레, FBS의 순으로 나타났다. 또한 관련변수에 따른 위험비에서 BMI, 흡연습관, 식품섭취 및 당뇨에 대한 가족력 등이 대사증후군의 위험비를 높이는데 관련된 것으로 나타났다. 따라서 대사증후군의 위험 관리를 위해서는 모든 생활습관 요인에 대한 평가와 중재가 필 요함을 시사하고 있다. The purpose of this study was to estimate the prevalence of metabolic syndrome and determine the distribution of the clustering of the metabolic risk factors, and we wanted to evaluated the related factors in urban areas. 1,388 adults of 30 years and over, not recognized as taking medicines for or having cardiovascular diseases, who underwent health package check-up at the health promotion center of a university hospital. All subjects were measured by height, weight, waist circumference, blood pressure and blood chemistry(lipid profile). As a results, the prevalence rates of metabolic syndrome of study subjects were 21.7%, and the rates of metabolic risk factors were HDL-C, blood pressure, TG, abdominal obesity and FBS in that order. And the factors such influencing on metabolic syndrome as age, BMI, smoking habits, vegetable consumption and family history of the diabetes. Consequently, it is suggested that the evaluation and intervention for lifestyle factors may be needed in order to the risk management of metabolic syndrome.