6160 results about "Working temperature" patented technology

A method is provided of localizing a drug action where the drug is present throughout a vascular system. The localization occurs to within a volume of blood in a blood vessel, the vascular system having an initial temperature substantially within a first temperature range. A temperature-specific enzyme is delivered throughout a vascular system including a volume of blood in a blood vessel, the temperature-specific enzyme having a working temperature within a prespecified temperature range that does not substantially overlap the first temperature range. A heat transfer element is delivered to a blood vessel in fluid communication with the volume of blood. The temperature of the heat transfer element is adjusted such that the volume of blood in the blood vessel is heated or cooled to the prespecified temperature range. In this way, the action of the temperature-specific enzyme is substantially limited to the volume of blood heated or cooled. In an alternative embodiment, the temperature-specific enzyme is localized to the volume of blood in the blood vessel, and the heat transfer element is disposed in fluid communication with the volume of blood in the blood vessel. The enzyme localization may occur by way of direct injection or by way of injection through a lumen of a catheter. The injection lumen of the catheter may be disposed at least partially adjacent or in combination with the heat transfer element and its associated inlet and outlet lumens.

Apparatus for maintaining the temperature of a component of a gas turbine engine below a predetermined maximum working temperature comprises a reservoir for a cooling fluid having a boiling point below the working temperature and in which the component is immersed or with which it is in contact. At least two heat exchangers are associated with the reservoir and operable to effect condensation of vaporised cooling fluid and return of same to the reservoir. Preferably the apparatus is a closed system incorporating three heat exchangers respectively adapted to effect heat exchange with engine fuel, compressed air derived from a fan or low pressure compressor of the engine and ambient air. Means may advantageously be provided to ensure return of condensed cooling fluid to the reservoir when the attitude of the reservoir is altered as a result of aircraft maneuvers.

The invention provides a terahertz light source chip and a manufacturing method thereof, a terahertz light source device and a manufacturing method thereof, and a terahertz light source module and a manufacturing method thereof. The light source chip comprises a two-dimensional electron gas mesa, an electrode, a terahertz resonant cavity and an optical grating, wherein the electrode is formed on the two-dimensional electron gas mesa and used for exciting plasma waves; the terahertz resonant cavity is formed below the two-dimensional electron gas mesa, and a holophote is arranged on the bottom surface of the resonant cavity; the optical grating is formed on the two-dimensional electron gas mesa and used for coupling a plasma wave mode to a terahertz resonant cavity mode so that terahertz wave emission can be generated. Plasma polaritons are formed by strongly coupling the terahertz resonant cavity mode to the plasma wave mode in two-dimensional electron gas under the optical grating, terahertz wave emission can be generated through electric excitation of the plasma polaritons, the problem that terahertz emission is low in frequency or working temperature because of high frequency oscillation relaying on a single electron or quantum jump relaying on a single electron is solved, and the emission frequency range and the working temperature range are widened.