Injections of noradrenaline into the lateral parabrachial nucleus (LPBN) increase arterial pressure and 1.8% NaCl intake and decrease water intake in rats treated with the diuretic furosemide (FURO) combined with a low dose of the angiotensin converting enzyme inhibitor captopril (CAP). In the present study, we investigated the influence of the pressor response elicited by noradrenaline injecte...

Maximal oxygen intake and renal plasma flow at rest and in work were measured in normal subjects and patients with aortic valve insufficiency; the tests measure some aspects of cardiovascular function. The lower maximal oxygen intake and renal plasma flow at rest and in work in these cardiac patients indicate a decreased cardiovascular performance capacity even though the patients were asymptom...

The effects of electronic properties of inner and outer surfaces of Carbon Nano Tubes (CNTs) on the deactivation of cobalt Fischer-Tropsch (FT) catalysts were studied. The comparative characterization of the fresh and used catalysts by TEM, XRD, TPR, BET and H2 chemisorption showed that cobalt re-oxidation, cobalt-support interactions and sintering are the main sources o...

Maximal oxygen intake and renal plasma flow at rest and in work were measured in normal subjects and patients with aortic valve insufficiency; the tests measure some aspects of cardiovascular function. The lower maximal oxygen intake and renal plasma flow at rest and in work in these cardiac patients indicate a decreased cardiovascular performance capacity even though the patients were asymptom...

Simple design of a rotary valve system is capable of controlling intake and exhaust gases, which will eliminate the need of known complex mechanisms. The cost of material and production, maintenance, and noise level of the system can be further reduced. The new mechanism enables the elimination of the overlapping of valves work that reduces gas leakage. This paper examines theoretically the gas...

Next level of passenger vehicles engines evolution is needed to comply with fuel economy and pollutant regulation legislative requirements. Turning a combustion engine with modern control systems into reverse uniflow two-stroke engines improves the power density of the engine and minimizes negative aspects of using the classic two-stroke engines. Variable valve timing allows control of the inta...

In the refrigerator compressors, the suction mufflers are commonly used to reduce the notse propagated through the intake valve system. In order to optimize the muffler design, it is necessary to characterize the source characteristics, i.e., the source impedance and the strength, of the intake system. In this paper, assuming the intake system as one-port, linear, time-invariant one, the acoust...

Intake valve parameters significantly affect the performance of piston-type expander (PTE). To improve compressed energy utilization efficiency, intake need to be regulated according load. In this paper, an electro-pneumatic variable actuation (EPVVA) system was proposed for independent control distributing parameters. The trajectory planning obtain good mechanical properties. Then, duration an...

A new camless compressed air engine is proposed, which can make the compressed air energy reasonably distributed. Through analysis of the camless compressed air engine, a mathematical model of the working processes was set up. Using the software MATLAB/Simulink for simulation, the pressure, temperature, and air mass of the cylinder were obtained. In order to verify the accuracy of the mathemati...