An experimental testing program was conducted to quantify leakage through a geomembrane liner system when subjected to high hydraulic heads. Leakage through geomembranes is mainly due to the presence of defects, which may occur during installation and operation. Previous studies focused on leakage through landfill liners (i.e., low hydraulic heads) have led to analytical models and simplified e...

Background and aim: The main factor that influences the durability of dental restorations is secondary caries. Antibacterial activity of dental materials is important from the clinical aspect, as it might inhibit recurrent caries. The aim of the present study was to compare the antibacterial activity of four fluoride-releasing dental cavity liners against Streptococcus mutans (S. mutans) and La...

The efficiency of attapulgite liners as anti-seepage for crude oil is examined. Consideration given to the potential use raw and mixture with prairie hay coconut husk prevent seepage. Attapulgite clay used in this study was brought from Injana formation /Western Desert Iraq. Two types Crude Iraqi fields were experiments; heavy East-Baghdad field light Nassiriya field. Initially basic properties...

Due to increase in the number of goods carrying tricycles, the amount of noise and pollution on our roads has increased. To optimize the control of the engine noise emission for tricycle, different absorptive material liners have been introduced into muffler design. In this study, the performance of Aerogel, Ceramic, Kenaf fibre, Polyester and Rockwool as absorptive material liners on the trans...

landfill is the major method of solid waste disposal in developing countries. to protect soil andgroundwater from contamination, anti-seepage systems have to be installed in landfills. however, during theconstruction of anti-seepage system, many factors can result in holes in geomembrane liners. for the purpose of improving construction quality, the construction company needs to find the leaks ...

Geosynthetics are planar polymeric products, which are used in connection with soil, rock or other soil-like materials to fulfill various functions in geoenvironmental engineering. Geosynthetics are of ever-growing importance in the construction industry. Sealing of waste storage facilities to safely prevent the emission of wastewater, landfill gas and contaminated dust as well as the diffusion...

The new resilient denture liner "M" was evaluated for adhesion, color stability, surface texture, tissue response, deterioration and denture base stability, at periods of 1 month, 3 months and about 30 months after denture liner application. At the observation of approximately 30 months, the usage of 17 dentures had been discontinued within 2 years, and 6 dentures continued to be used. It could...

We report our preliminary results on the role of starbursts in LINERs by use of WR galaxies as a tool. The essence of this approach lies in the different FIR-radio relation of WR galaxies from the pure AGN's. The energetics of LINERs has been a controversial issue since their definition by Heckman (1980). In recent years, several LINERs have been observed by HST, or large ground-base facilities...

Introduction: Ultra-high molecular weight polyethylene oxidation remains an important concern in total joint arthroplasty, since it eventually results in a significant drop in mechanical properties that may compromise implant longevity, especially for TKA [1-3]. In vivo oxidation of polyethylene can occur in the presence of unstabilized macroradicals within the polymer and molecular oxygen upta...

Ionization sources other than HII regions give rise to the right-hand branch in standard ([NII]) BPT diagram, populated by Seyfert 2s and LINERs. However, because majority of Seyfert/LINER hosts are star forming (SF), contaminate observed lines some extent, making it unclear if position along is merely due various degrees mixing between pure SF, or whether reflects intrinsic diversity ionizing ...