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장가연,조소연,강호정,함정희 梨花女子大學校 醫科大學 醫科學硏究所 1998 EMJ (Ewha medical journal) Vol.21 No.3
목적: 아토피 피부염의 중증도나 동반 알러지 질환 유무에 따른 임상 및 검사실 소견의 차이와 그 의의를 알아보고자 하였다. 방법: 1995년 8월부터 1996년 7월까지 1년동안 본원 피부과 외래를 방문한 환자를 대상으로 피부과 의사의 직접적인 면담, 신체검사, 세균배양검사, 단자 검사 및 면역학적 검사를 시행하였다. 결과: 1) 피부 건조증, 이개 균열, hyperlinear paim의 동반이 중증도에 따른 유의성을 보였다. 2) 땀, 음식, 흡입항원이 중증군에서 통계학적으로 유의하게 악화요인으로 작용하였다. 3) 아토피 피부염의 가족력 도압ㄴ율이 중증군에서 57.9%, 경증군에서 26.3%로 중증도에 따른 유의성을 보였다. 4) 호흡기 아토피 질환 유무에 따른 집먼지 진드기에 대한 피부단자검사 양성율이 통계학적인 유의성을 보였다. 5) 총 혈청 IgE가 중증군에서 938.3±601.8IU/mL, 경증군에서 526.7±352.1IU/mL로 통계학적인 유의성을 보였다.(p<0.05) 6) 호흡기 아토피 질환이 동반된 아토피 피부염환자의 혈청 IgE는 1025.8±713.2IU/mL, 호흡기 아토피 질환이 동반되지 않은 군은 403.3±273.4IU/mL 로 유의한 차이를 보였다(p<0.05). 7) 혈청 호산구 값은 중증군에서는 509.9±398.4/㎣, 경증군에서는 340.5±219.4/㎣로 중증군에 따른 유의성을 보였다(p<0.05). 결론: 1) 아토피 피부염의 임상적 중증도와 연관있는 것은 피부 건조증, 이개균열, hyperlinear palm 같은 피부 보조증상, 땀, 음식, 흡입항원같은 악화요인이며, 혈청 IgE 증가 및 혈중 호산구증가같은 거사실 소견이었다. 2) 호흡기 아토피 질환이 있는 아토피 피부염 환자에서 높은 혈청 IgE치와 집먼지 진드기에 대한 높은 단자 검사 양성율을 보였다. Objectives : This study was performed to investigate the clinical manifestations and labora-tory findings, and to see whether the severity of atopic dermatitis(AD) implies a relationship to the clinical and laboratory findings. Methods : Our study was designed by analyzing outpatients with AD via physical examinat-ion, questionnaires and laboratory investigations such as prick test to house dust mites, bacterial cultures, total IgE, IgA, IgG, IgG_4, IgM, and peripheral eosinophil count. Results : 1) Xerosis, ear fissuring and hyperlinear palms were related to the severity of AD(p<0.05). 2) Sweating, foods and aeroallrgen were related to the severity of AD(p<0.05). 3) The presence of family history of AD differed significantly(p<0.05) between the severe group(57.9%) & the mild group(26.3%). 4) The positivity of the prick test to Dermatophagoides pteronyssinus and D.farinae was found in 90.0% of respiratory group and in 30.0% of AD only(p<0.05%). 5) Serum IgE level was higher in the severe group(938.3±601.8 IU/mL) than the mild group(526.7±352.1IU/mL)(p<0.05). 6) Serum IgE level in AD patients with respiratory disease(1025.8±713.2IU/mL) was higher than AD only(403.3±273.4IU/mL)(p<0.05). 7) Peripheral eosinophil counts were higher in the severe group(509.9±389.4/㎣) than the mild group(340.5±219.4/㎣)(p<0.05). Conclusion : The factors related to severity of AD were xerosis, ear fissuring, hyperlinear palms, sweating, food, aeroallergen, serum IgE and peripheral eosinophil count. The AD pati-ents with respiratory allergic disease had higher IgE levels and higher positive rates of prick test with house dust mite.
Washout resistance of fast-setting pozzolan cement under various root canal irrigants
장가연,박수정,허석모,유미경,이광원,민경산 대한치과보존학회 2013 Restorative Dentistry & Endodontics Vol.38 No.4
Objectives Fast-setting pozzolan cement (Endocem, Maruchi) was recently developed. The aim of this study was to investigate the effects of various root canal irrigants on the washout of Endocem in comparison to the previously marketed mineral trioxide aggregate (ProRoot; Dentsply) in a furcal perforation model. Materials and Methods ProRoot and Endocem were placed into acrylic molds on moist Oasis. Each mold was then immediately exposed to either physiologic saline, 2.5% sodium hypochlorite (NaOCl), or 2% chlorhexidine (CHX) under gentle shaking for five minutes. Washout testing was performed by scoring scanning electron microscope (SEM) images. Results Endocem exhibited higher washout resistance compared to ProRoot, especially in the NaOCl group. Conclusions These results suggest that Endocem can be considered a useful repair material for furcal perforation, especially in a single-visit scenario.
기후변화 시나리오의 기온상승에 따른 낙동강 남세균 발생 예측을 위한 데이터 기반 모델 시뮬레이션
장가연,조민경,김자연,김상준,박힘찬,박준홍 한국물환경학회 2024 한국물환경학회지 Vol.40 No.3
Harmful cyanobacterial blooms (HCBs) are caused by the rapid proliferation of cyanobacteria and are believed to be exacerbated by climate change. However, the extent to which HCBs will be stimulated in the future due to increased temperature remains uncertain. This study aims to predict the future occurrence of cyanobacteria in the Nakdong River, which has the highest incidence of HCBs in South Korea, based on temperature rise scenarios. Representative Concentration Pathways (RCPs) were used as the basis for these scenarios. Data-driven model simulations were conducted, and out of the four machine learning techniques tested (multiple linear regression, support vector regressor, decision tree, and random forest), the random forest model was selected for its relatively high prediction accuracy. The random forest model was used to predict the occurrence of cyanobacteria. The results of boxplot and time-series analyses showed that under the worst-case scenario (RCP8.5 (2100)), where temperature increases significantly, cyanobacterial abundance across all study areas was greatly stimulated. The study also found that the frequencies of HCB occurrences exceeding certain thresholds (100,000 and 1,000,000 cells/mL) increased under both the best-case scenario (RCP2.6 (2050)) and worst-case scenario (RCP8.5 (2100)). These findings suggest that the frequency of HCB occurrences surpassing a certain threshold level can serve as a useful diagnostic indicator of vulnerability to temperature increases caused by climate change. Additionally, this study highlights that water bodies currently susceptible to HCBs are likely to become even more vulnerable with climate change compared to those that are currently less susceptible.