The ultracentrifuge rotor usually works at 30,000 r/min or more, so centrifuge chamber must maintain a high vacuum to reduce friction of rotor and air. The paper described the vacuum control system design based on MSP430 microcontroller. The system included the MCU, sensors, measurement and conditioning circuitry, vacuum control circuit, power circuit components and so on. Tests proved that the...

Most institutions performing cardiopulmonary bypass for congenital heart disease patients use an integrated hard shell cardiotomy and venous reservoir attached to an oxygenator. It is of paramount importance that the integrated reservoir be vented so as not to cause pressurization. A pressurized sealed cardiotomy has been reported to occur secondary to issues with vacuum assisted venous drainag...

The nature of the encephalopathic agent present in monkey bone marrow has been investigated. It is readily soluble at a pH of 7.4, as well as at the low pH of 2.0 and 3.0. The point of minimal solubility is pH 4.2. Heat inactivation is produced by a temperature of 75 degrees C., acting for 15 minutes. The agent is digested by pepsin. It exhibits a slight degree of sedimentation with the air-dri...

Article deals with the problem of heat transfer by condenser and evaporator for a closed loop pipe cooling hermetically sealed electrotechnical box. In an article can find design exchanger optimal solution, construction description experimental state measuring their performance. Air temperatures, system pressure, air flow data were recorded. The measured values are then evaluated capacity excha...

This paper describes the electro-thermal design of a medium voltage modular multilevel converter prototype, from the submodule power semiconductor thermal requirements to the overall system level integration. The high number of semiconductors and capacitors involved are stressed differently depending on the actual operating conditions, as discussed in the paper. The presented design considers a...

Electromagnetic waves propagating in air are visually observed with phase evolution in real time by live electro-optic imaging technique. We show how geometrical and crystallographic arrangements of an electro-optic sensor plate enable the realization of the real-time visual observation of traveling 100-GHz electromagnetic waves. For this purpose, a generation technique for a 100-GHz optical lo...

Coupled electro-thermal field exists widely in chemical batteries and electrolysis industry. In this study, a three-dimensional numerical model, which is based on the finite-element software ANSYS, has been built to simulate the electro-thermal field in a magnesium electrolysis cell. The adjustment of the relative position of the anode and cathode can change the energy consumption of the magnes...