OBJECTIVES Dental composite wear in posterior restorations is a concern and is affected by different factors. This study was conducted to evaluate the effect of polishing and mechanical loads on wear of silorane-based and methyl methacrylate-based composites resins. MATERIALS AND METHODS Of each dental composite (Filtek P90 and Filtek P60), 40 samples were fabricated in a polyethylene mold (4...

Increasing demand and resource overuse has prompted the exploration of spent secondary materials as a primary raw material for variety applications, leading to more sustainable environment. Spent electric grid ceramic insulator, one waste industry, good hardness strength. It can be reused value-added in Abrasive Water Jet Machining (AWJM) industry. The present work deals with generation cost-ef...

Researchers developed the Original Grit Scale (Grit-O), Short (Grit-S), and Grit-5 to investigate role of grit in explaining educational vocational outcomes. The present study examined structure psychometric characteristics these three measures using data from residents United States (n = 1,915) who completed Grit-O online. We conducted confirmatory factor analyses Kline’s (2016) method assessi...

The role of personality traits in sporting achievement has generated interests among sport researchers and practitioners, however, studies on the relationship between sporting achievement and personality traits have yielded no clear evidence of a cause effect relationship. Instead, psychological skills and attitudes have shown evidence of influence over sporting achievement. This study explored...

This study investigated the effects of reed and willow on bioremediation of landfill leachate in comparison with an unplanted control by measuring redox potential levels in the rhizosphere of microcosm systems in a greenhouse. Plants had a significant influence on redox potential relative to the plant-less system. Redox potential in the reed rhizosphere was anoxic (mean -102±85 mV), but it was ...

Microwear, the quantification of microscopic scratches and pits on the occlusal surfaces of tooth enamel, is commonly used as a paleodietary proxy. For ungulates (hoofed mammals), scratch-dominant microwear distinguishes modern grazers from browsers, presumably as a result of abrasion from grass phytoliths (biogenic silica). However, it is also likely that exogenous grit (i.e. soil, dust) is a ...

Iodine is an essential micronutrient for human health. Its deficiency causes a number of functional and developmental abnormalities such as goitre. The limestone region of Derbyshire, UK was goitre-endemic until it declined from the 1930s and the reason for this has escaped a conclusive explanation. The present study investigates the cause(s) of goitre in the UK-Peak District area through an as...

Bioretention is a novel best management practice for urban storm water, employed to minimize the impact of urban runoff during storm events. Bioretention consists of porous media layers that can remove pollutants from infiltrating runoff via mechanisms that include adsorption, precipitation, and filtration. However, the effectiveness of bioretention in treating repetitive inputs of runoff has n...