ALTERNATIVE WAY FOR DETERMINATION OF YIELDS STRESS AS RHEOLOGY PARAMETER FOR MUDFLOW
Published In: 3RD INTERNATIONAL CONFERENCE ON ADVANCES IN CIVIL AND STRUCTURAL ENGINEERING
Author(s): BUDIJANTO WIDJAJA , AGLENTIA DWI FITRI , DIANITA ANDRIANI , RIZKA A. SUTISNA
Abstract: To understand the behavior of mudflow as one of notorious mass movement in geotechnical engineering, two rheology parameters should be obtained as yield stress and viscosity. Water content for mudflow could be equal to or higher than liquid limit. Viscosity could be obtained using a flow box test. Flow box test uses couple theory from Terzaghi’s trap door and Bingham model. There is a limitation for flow box test that it needs yield stress (i.e., undrained cohesion) value for deriving viscosity. Hence, fall cone penetration test could be used to determine yield stress by using the empirical equation based on its penetration. This test uses 80 g of cone with 30o cone angle. In this paper, the authors use kaolin, bentonite, Parakan Muncang, and Cipali. The range of water content of each soil is from plastic limit and over liquid limit. The results show that the shear strength of kaolin and Parakan Muncang is higher than bentonite and Cipali. This may due to the type of soil mineral. Henc
- Publication Date: 12-Apr-2016
- DOI: 10.15224/978-1-63248-057-6-45
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PROTECTIVE ACTION OF HERBAL MELANIN AGAINST CARBON TETRACHLORIDE INDUCED HEPATOTOXICITY
Published In: 3RD INTERNATIONAL CONFERENCE ON ADVANCES IN APPLIED SCIENCE AND ENVIRONMENTAL ENGINEERING
Author(s): ADIL HASEEB , ADILA EL-OBEID , KAMAL EL DIN EL TAHIR , MOHAMED ANWAR K ABDELHALIM
Abstract: The present study investigated the efficacy of a herbal melanin derived from Nigella sativa L. seed coats (NS melanin) on prevention of carbon tetrachloride (CCl4) induced acute hepatic injury in Wistar rats. Hepatic damage due to CCl4 intoxication was assessed by quantifying the markers of hepatic oxidative damage, aspartate transaminase (AST), alanine transaminase (ALT) and hepatic liver peroxide marker malondialdehyde (MDA). Treatment of the rats with CCl4 increased the levels of AST, ALT in the blood and MDA in liver homogenate. Pre-treatment with herbal melanin solutions resulted in significant reduction in the levels of the hepatic enzymes and peroxides in a dose related manner. Our findings provide evidence to demonstrate that Nigella sativa L. melanin has a potent hepato-protective effect on CCl4- induced liver injury in rats. It is proposed that the action of melanin is through its antioxidative and immunomodulatory activity via activation of Toll-like receptor 4 and subsequen
- Publication Date: 12-Apr-2015
- DOI: 10.15224/978-1-63248-055-2-01
- Views: 0
- Downloads: 0