در هنگام جستجو کلمه در قسمت عنوان میتوانید کلمات مورد جستجو را با کاراکتر (-) جدا کنید.
کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Iranian Journal of Chemistry and Chemical Engineering
- نوع مقاله: Journal Article
- کلمات کلیدی: Adsorption,Corrosion inhibitor,Steel,Cationic gemini surfactants,Weight loss, Surface tension
- چکیده:
- چکیده انگلیسی: α, ω-alkane-bis(N-myristoyloxyethyl-N, N-dimethyl)-diammonium bromide were synthesized and confirmed by FT-IR, FT-Raman and 1H-NMR spectroscopy. Surface tensions were measured by sigma 70 and conductivity meter EC-470C. Critical micelle concentration values were 2.70×10-4∼3.05×10-4 mol/L. The Krafft points were measured at 39.1 ~ 43.2℃. Their inhibition effects on the corrosion of low carbon steel were tested by the weight loss method in hydrochloric acid. The corrosion inhibition capacity of synthesized cationic gemini surfactant was 24.8% at 1 X 10-7mol/L concentration. Corrosion inhibition efficiency has increased by 93.8% after the concentration was increased to 1 X 10-4mol/L. As a result, these surfactants are expected to be applied as corrosion inhibitors.
- انتشار مقاله: 19-10-1393
- نویسندگان: Jong Kwon Park,Noh Hee Jeong
- مشاهده
- جایگاه : پژوهشی
- مجله: Asian Pacific Journal of Cancer Prevention
- نوع مقاله: Journal Article
- کلمات کلیدی: Prostatic Neoplasms,social class,income,Educational status
- چکیده:
- چکیده انگلیسی: Background: Prostate cancer prevalence recently has increased among male adults in South Korea. But, few study has evaluated the reason. Therefore, we investigated the relationship between socioeconomic status and prevalent prostate cancer. Methods: This study enrolled 16,215 males aged 40 years and over who took part in the Korean National Health and Nutrition Examination Survey 2007-2016. In addition, we obtained the 2000-2016 age-standardized incidence rate and age-standardized mortality rate of prostate cancer from the Korean Statistical Information Service. Results: After adjusting for other covariates, prevalent prostate cancer was significantly associated with monthly household income (OR 3.71, 95% confidence interval [CI] 1.48–9.30, for highest vs. lowest) and significantly associated with education level (OR 3.66, 95% CI 1.54–8.70, for ≥ 13 vs. ≤ 6). In the analysis of the age-standardized incidence rate and the age-standardized mortality rate, the age-standardized incidence rate has soared from 2000 to 2011 and then decreased gradually, but the age-standardized mortality rate did not change. Conclusion: In our results, prevalent prostate cancer increased significantly with socioeconomic status and the increase in prevalent prostate cancer may be attributable to earlier detection rather than to a real increase in prevalence.
- انتشار مقاله: 04-05-1398
- نویسندگان: Hee-Won Hur,So-Yeon Ryu,Jong Park,Seong-Woo Choi
- مشاهده