Ultrasonic energy is used for applying severe plastic deformation on metal surfaces. In the present work, the effect of ultrasonic vibration on the formability, microhardness and microstructural proper...

To assess the sources, transport and deposition of atmospheric mercury (Hg) in Michigan, a multi-site network was implemented in which Hg concentrations in event precipitation and ambient samples (vapor aod particulate phases) were determined. Results from the analysis of 2 years of event precipitation samples for Hg are reported here. The volume-weighted average Hg concentration in precipitati...

Section 112(m) of the 1990 Clean Air Act Amendments, referred to as the Great Waters Program, mandated an assessment of atmospheric deposition of hazardous air pollutants (HAPs) to Lake Champlain. Mercury (Hg) was listed as a priority HAP and has continued to be a high priority for a number of national and international programs. An assessment of the magnitude and seasonal variation of atmosphe...

Ultrasonic-assisted grinding processing can effectively reduce the surface roughness and enhance efficiency in of hard brittle materials. However, most common ultrasonic assisted is a type contact where tool directly contacts workpiece, which means that it necessary to accurately control pre-pressure on workpiece. The will inevitably increase complexity device, easy wear workpiece because impro...

In this study, the effects of three different independent variables (extraction temperature, extraction time, ultrasonic power) on total phenolic content, yield and antioxidant capacity (IC50) value olive leaf extracts Halhalı variety which is originated from South-eastern Anatolia Region were investigated. As a result evaluation made with Box-Behnken Design Model, optimum conditions determined...

An enzymatic biotransformation process based on extracted pyruvate decarboxylase (PDC) overcomes the problem of by-product benzyl alcohol production. Seven methods of cells disruption which included application of glass beads, freezing/thawing sequence, silver nanoparticles, ultrasonication, freezing/thawing sequence with glass beads, freezing/thawing sequence with silver nanoparticles, and fre...

High density reduced graphite oxide was prepared via a novel precipitation-assisted method, and the micropore area was found to be above 70% of the total surface area for the as-prepared sample. Electrochemical experiments showed that the as-prepared samples exhibited high volumetric capacitance and excellent cycling stability as an electrode material in supercapacitors.

The 'windows' or 'doors' on the surface of a closed hollow structure can enable the exchange of material and information between the interior and exterior of one hollow sphere or between two hollow spheres, and this information or material exchange can also be controlled through altering the window' size. Thus, it is very interesting and important to achieve the fabrication and adjustment of th...

PURPOSE To assess whether a combined treatment of low-frequency (25 kHz) ultrasonic-debridement systems followed by vacuum-assisted wound closure (VAC) produces a better outcome in deep sternal wound infections (SWIs) compared to that of VAC alone. METHODS We evaluated 45 consecutive patients (25 males) between January 2013 and December 2016, in whom deep SWI was treated with a combination of...