Cerebral arteries are abundantly innervated by sympathetic fibers, but their influence on cerebral vessels was held unimportant for almost a century (2, 20). Whether there is sympathetic influence on cerebral blood flow (CBF) is important in the management of hypotensive patients. If there is no -adrenergic influence on CBF, a low mean arterial pressure (MAP) can be increased to the cerebral au...

For better design and optimization of the heat exchanger (HX), forced convective transfer flow characteristics supercritical carbon dioxide (SCO2) in a water-cooled experimental counter-flow tube-in-tube HX were studied numerically with three-dimensional Reynolds-averaged Navier-Stokes equations shear stress transport (SST) turbulence model by using computational fluid dynamics method ANSYS CFX...

The most common technology for the recovery of energy and valuable materials from sewage sludge is anaerobic digestion (AD). Ensuring thermophilic conditions during AD has been proven to cause process intensification an improvement in its final outcomes. Nonetheless, search underway other methods bolster effectiveness aerobic granular (AGS), which characterized by a compact complex structure. A...

The variations in the chemical composition, and consequently, on the biological activity of the propolis, are associated with its type and geographic origin. Considering this fact, this study evaluated propolis extracts obtained by supercritical extraction (SCO2) and ethanolic extraction (EtOH), in eight samples of different types of propolis (red, green and brown), collected from different reg...

The sitting beach-chair position is regularly used for shoulder surgery and anesthesia may be induced in that position. We tested the hypothesis that the cardiovascular challenge induced by induction of anesthesia is attenuated if the patient is placed in a reclining beach-chair position. Anesthesia was induced with propofol in the sitting beach-chair (n = 15) or with the beach-chair tilted bac...

Loss models are used to evaluate the aerodynamic performance of axial turbines at preliminary design stage. The commonly loss were derived for air and steam have not been sufficiently investigated working with non-conventional fluids, relevant new power systems, such as organic fluids supercritical CO2 (sCO2). Thus, aim this study is explore deviation between predictions different models, namel...

Supercritical carbon dioxide (sCO2) cycles can achieve higher efficiencies than an equivalent steam Rankine cycle at turbine inlet temperatures (>550 °C) with a compact footprint (tenfold). sCO2 are low-pressure ratio (~4–7), therefore recuperation is necessary, which reduces the heat-addition temperature range. Integration of boiler requires careful management low-temperature heat to plant eff...