http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
석면함유 슬레이트 지붕 물받이 퇴적물 중 석면 섬유 함유율
임지현,한솔민,김현석,신유민,박시은,허정윤,김민영,장봉기 순천향대학교 기초과학연구소 2022 순천향자연과학연구 논문집 Vol.28 No.1,2
This study attempted to determine the degree of asbestos release from the aging slate roof by comparing the asbestos content in the slate roof rain gutter with a colored steel plate (tin plate) over the slate roof. Four slate roof houses located in Haengmok-ri, Asan-si, Chungcheongnam-do, and one house constructed with a colored steel plate on the slate roof were selected to collect the sediment of the roof rain gutter. The asbestos fiber content was calculated by a point counting method using a polarization microscope after pretreatment with conversion treatment and hydrochloric acid treatment. The average asbestos content of the four slate roof rain gutter were 1.89%. However, asbestos was not detected in the Slate covering roof rain gutter, which were constructed on the slate roof. Asbestos fiber content was the highest at 2.89% in the slate roof rain gutter installed in 1976, followed by 2.44% in 1953. From the above results, it is necessary to minimize secondary damage as asbestos fibers released from slate roof houses to the surrounding atmosphere or leaked from slate roofs as rainwater may cause soil pollution and seriously affect residents' health. Although covering with colored steel plates (tin plates) has been shown to prevent the leakage of asbestos fibers to some extent, it is believed that a policy alternative to remove the slate roof as soon as possible is needed to solve the fundamental problem.
( Han Sol Chang ),( Sung Yeon Hwang ),( Jong Eun Park ),( Taerim Kim ),( Joo Hyun Park ),( Hee Yoon ),( Won Chul Cha ),( Min Seob Sim ),( Ik Joon Jo ),( Tae Gun Shin ) 대한응급의학회 2019 대한응급의학회지 Vol.30 No.6
Objective: Research on calcium use as an adjunctive rescue therapy for refractory septic shock is limited. In this study, we aimed to investigate the short-term hemodynamic response after calcium supplementation in patients with refractory septic shock. Methods: This was a single-center, retrospective study of patients who presented to the Emergency Department from October 2014 through February 2018. Patients with refractory septic shock requiring norepinephrine-equivalent (NE) dose ≥ 0.5 μg/kg/min and receiving calcium supplementation, were included in the analysis. Patients were categorized into response group and no-response group, based on the changes in NE doses and mean arterial pressure after calcium administration. A multivariable logistic regression model was used to evaluate the association between hemodynamic response and 28-day survival. Results: A total of 66 patients were included in the study. Of these, 34 patients (52%) were classified as the response group, and 32 patients (48%) encompassed the no-response group (17 patients who deteriorated and 15 patients who had no significant changes in the clinical status). The 28-day mortality was determined to be 44% in the response group and 63% in the no-response group (P=0.14). Multivariable analysis revealed that the response group had a significant association with lower 28-day mortality (adjusted odds ratio, 0.23; 95% confidence interval, 0.06-0.89; P=0.03). Conclusion: Short-term hemodynamic changes after calcium administration were variable in patients with refractory septic shock. Hemodynamic improvement after calcium supplementation may be associated with better survival. Further studies are required to determine when calcium supplementation needs to be considered, and how it impacts patientcentered outcomes in refractory septic shock.
Jang, Min-Kyung,Han, Yu-Ran,Nam, Jeong Soo,Han, Chang Woo,Kim, Byung Joo,Jeong, Han-Sol,Ha, Ki-Tae,Jung, Myeong Ho MDPI 2015 INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES Vol.16 No.11
<P>Endoplasmic reticulum (ER) stress is associated with the pathogenesis of hepatic steatosis. <I>Alisma orientale</I> Juzepzuk is a traditional medicinal herb for diuretics, diabetes, hepatitis, and inflammation. In this study, we investigated the protective effects of methanol extract of the tuber of <I>Alisma orientale</I> (MEAO) against ER stress-induced hepatic steatosis <I>in vitro</I> and <I>in vivo</I>. MEAO inhibited the tunicamycin-induced increase in luciferase activity of ER stress-reporter constructs containing ER stress response element and ATF6 response element. MEAO significantly inhibited tunicamycin-induced ER stress marker expression including GRP78, CHOP, and XBP-1 in tunicamycin-treated Human hepatocellular carcinoma (HepG2) cells and the livers of tunicamycin-injected mice. It also inhibited tunicamycin-induced accumulation of cellular triglyceride. Similar observations were made under physiological ER stress conditions such as in palmitate (PA)-treated HepG2 cells and the livers of high-fat diet (HFD)-induced obese mice. MEAO repressed hepatic lipogenic gene expression in PA-treated HepG2 cells and the livers of HFD obese mice. Furthermore, MEAO repressed very low-density lipoprotein receptor (VLDLR) expression and improved ApoB secretion in the livers of tunicamycin-injected mice or HFD obese mice as well as in tunicamycin or PA-treated HepG2 cells. Alismol, a guaiane-type sesquiterpenes in <I>Alisma orientale</I>, inhibited GRP78 expression in tunicamycin-treated HepG2 cells. In conclusion, MEAO attenuates ER stress and prevents hepatic steatosis pathogenesis via inhibition of expression of the hepatic lipogenic genes and VLDLR, and enhancement of ApoB secretion.</P>
열량계와 겉보기 활성화 에너지를 이용한 콘크리트의 압축강도 예측에 관한 실험적 연구
김한솔 ( Kim Han-sol ),장종민 ( Jang Jong-min ),김영관 ( Kim Yeung-kwan ),이한승 ( Lee Han-seung ) 한국건축시공학회 2020 한국건축시공학회 학술발표대회 논문집 Vol.20 No.2
Predicting the compressive strength of concrete is important for shortening construction time and reducing construction costs. In this study, the coefficients required for maturity method and compressive strength prediction equation were calculated by measuring the cement hydration reaction rate, concrete setting time and ultimate strength. The experiment was conducted in an isothermal environment of 10°C, 20°C and 30°C using a normal Portland cement, and the experiment was conducted with a total of 9 levels of W/C (40%, 50%, 60%) of 3 levels for each temperature. As a result of comparing the predicted strength and the measured strength for each blend, only an error of less than 5% was found for all blending and curing periods.