BACKGROUND Mechanical ventilation causes ventilator-induced lung injury in animals and humans. Mitogen-activated protein kinases have been implicated in ventilator-induced lung injury though their functional significance remains incomplete. We characterize the role of p38 mitogen-activated protein kinase/mitogen activated protein kinase kinase-3 and c-Jun-NH(2)-terminal kinase-1 in ventilator-i...

OBJECTIVE This research aimed to compare, through traction tests, eight types of superelastic and heat-activated NiTi archwires, by six trade companies (GAC, TP, Ormco, Masel, Morelli and Unitek) to those with addition of copper (CuNiTi 27°C and 35°C, Ormco). METHODS The tests were performed in an EMIC mechanical testing machine, model DL10000, capacity of 10 tons, at the Military Institute o...

AlCoCrFeNi High Entropy Alloys were here synthesized by the combination of Planetary Ball Milling and Spark Plasma Sintering at 1100 °C. The relatively low rotating speed led to a peculiar agglomerate state referred as “Mechanical Activated”. reactive sintering activated agglomerates leads unique dualphase microstructure: sintered sample exhibited distinctive nanostructured lamellar microstruct...

Tristel Sporicidal Wipes are chlorine dioxide-based disinfectant wipes for disinfecting non-lumened semi-critical medical devices. In this study, the mycobactericidal activity of this product was assessed by a modified version of the European Standard prEN 14563 carrier test under clean conditions against Mycobacterium avium. The chlorine dioxide concentration in the activated wipe was 200ppm. ...

chlorination of natural water containing humic compounds, produce significant amount of disinfectant by - products. the most important of such compounds are thlvis and halo acetic acids, suspected to cause cancer in animals and human. studies showed that under usual processes of water treatment plants, thms can not be removed effectively. since chlorination is the final process of treatment, it...

Several in vivo and in vitro studies with different loading regimens showed that mechanical stimuli have an influence on proliferation and differentiation of bone cells. Prerequisite for this influence is the transduction of mechanical signals into the cell, a phenomenon that is termed mechanotransduction, which is essential for the maintenance of skeletal homeostasis in adults. Mechanoreceptor...

Background Cardiac resynchronization therapy (CRT) benefits selected heart failure patients; however, CRT has a nonresponse rate of approximately 30-40%. Important factors that contribute to lead placement decisions and overall CRT success include determination of mechanical dyssynchrony, presence and location of scar, and the identification of late-activated segments. Recent imaging studies ha...

Storage of hydrogen is one of the key challenges in developing hydrogen economy. Magnesium hydride (MgH2) is an attractive candidate for solid-state hydrogen storage for on-board applications. In this study, 10 wt.% ZrB2 was co-milled with magnesium hydride at different milling times to produce nanocrystalline composite powder. The effect of milling time and additive on the hydrogen desorption...

Intracellular and extracellular mechanical environments have a significant impact on survival and proliferation of cells. While the extracellular signal-regulated kinase (ERK) subfamily of MAP kinases plays critical roles in regulations of these cellular behaviors, activation of ERK is affected by mechanical conditions of cells. We have recently found that ERK is activated on contractile actomy...

Mechanical activation is known to greatly influence the reactivity of fly ashes. In this paper, we report a comparative study properties alkali-activated geopolymer materials prepared using both ball-milled and attrition-milled Ball milling was carried out for 30 min 60 while attrition continuously in high-speed attritor. The surface area raw ash decreased from 4017 cm2/g 3999 3912 after ball m...