Contributors in Science
Science > General science 
electrometer
Science; General science
A highly sensitive instrument which measures all or some of the following variables: current, charge, voltage, and resistance. There are two classes of electrometers, mechanical ...
parametric amplifier
Science; General science
A highly sensitive low-noise amplifier for ultrahigh-frequency and microwave radio signals, utilizing as the active element an inductor or capacitor whose reactance is varied ...
heparin
Science; General science
A highly sulfated mucopolysaccharide isolated from mammalian (chiefly beef) tissues, with blood anticoagulant activity. Heparin was first found in abundance in the liver, hence ...
smart structures
Science; General science
A high-performance fighter aircraft is a self-contained unit with its own energy source in the form of the fuel. However, a pilot is normally needed to take off, perform ...
spitzer space telescope
Science; General science
A high-performance infrared telescope that is one of the four Great Observatories launched by the National Aeronautics and Space Administration (NASA) between 1990 and 2003. It ...
metal halide lamp
Science; General science
A high-pressure discharge lamp that is enclosed in a quartz envelope containing metal halides, usually iodides, and produces high-efficacy white light. These lamps are widely ...
microwave tube
Science; General science
A high-vacuum tube designed for operation in the frequency region from approximately 3000 to 300,000 megahertz. Two considerations distinguish a microwave tube from vacuum tubes ...
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