When the President of the United States has opinions which are sometimes counter to those of Congress, he is known to encounter opposition.
The assigned counter, of how many customers came into the store last month, laid out his report on the counter when he was discussing the counter offensive with his supervisor.
Antigens in a gel medium in which the pH is controlled are strongly negatively charged and will migrate rapidly across the electric field toward the anode.
The antibody in such a medium is less negatively charged and will migrate in an opposite or "counter" direction toward the cathode.
If the antigen and antibody are specific for each other, they combine and form a distinct line of precipitation.
This technique is becoming increasingly useful for detecting antigens or antibodies specific for given infectious diseases, diagnosing clinical bacterial infections, and choosing medications to treat the infections.
2. An electronic circuit using electron tubes or equivalent devices for counting electric pulses or transient sharp changes in voltage, currents, or some other normally constant quantities in an electronic system.
3. An instrument capable of counting up to several million electrical pulses per second.
2. Efforts made to ensure effective use of electromagnetic radiation in spite of the use of countermeasures by an enemy.
3. Retaliatory tactics used to reduce the effectiveness of electronic countermeasures.
2. An apparatus that counts the number of unit charges of electricity that are contained in a sampled volume of the atmosphere.
The general procedure is to pass a sample of the atmosphere through a charged cylindrical condenser.
The change in the potential across the condenser is a measure of the ionic charge contained in the sample volume and the change in potential depends upon such factors as the polarizing potential of the condenser, the mobility and charge of the ions, volume and length of the condenser, and sample flow rate.
2. A portable instrument for making a rough and rapid evaluation of airborne dust concentrations.
It consists of a hand-primed pump that draws a known volume of air through a jet on to a plate on which particles ar counted under magnification.
Named after John Aitken (1839-1919), a Scottish physicist and meteorologist, one of the founders of cloud physics and aerosol science who invented the first koniscope.