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irritation where the pads are placed. the home devices, many costing less than $ , allow you to adjust the intensity (pulse frequency and amplitude) of the current and the length of the session. if you purchase a tens unit, follow the instructions to ensure that you use it safely. for example, electrodes...
currents and voltages of relatively small amplitude. usually they are intended, as their name suggests, to trigger other larger devices. typically cold cathode trigger tubes are designed to switch pulses of a few hundred volts and a few hundred milliamperes. most trigger tubes have three or four electrodes...
organic chemists. read the virtual issue view virtual issues from organic letters current issue the latest published issue of organic letters. see all articles . copper-catalyzed asymmetric propargylic alkylation with oxindoles: diastereo- and enantioselective construction of vicinal tertiary and all-carbon...
pit leading to corrosion. their colour ranges from red through yellow to white, depending on their copper content. bronzes are used in springs, gears and bearings. alother uses include organ pipes, the manufacture of superconductors, in glass making to obtain a perfectly smooth surface, in lead electrodes...
to % sn, but this use has been virtually eliminated as a result of the development of the offset printing process. also present in certain pb–sn–sb anti-friction metals used to make bearings for large compressors and propeller shafts. used in lead-acid batteries to harden the lead of which the electrodes...