Abstract: A method and system for detecting or quantifying biologically effective radiation emitted from an activated wireless communication device such as a cellular phone or the antenna of a cellular phone. The method uses microorganismal cells producing a detectable response when exposed to biologically effective radiation. The device is placed a predetermined distance from microorganismal cells and then activated for a predetermined amount of time. At the end of the predetermined amount of time, it is determined whether the response was produced in the cells. Production of the response indicates that the device emitted biologically effective radiation.

Abstract: A main electrode (2, 20, 30, 44, 127) for plasma arc generator, a generator (50, 70, 80, 126) comprising same and a process for treatment of solidifying liquid metal by the mentioned generator, wherein the main electrode in association with a counter electrode (15, 28, 42, 54, 73, 86, 122) provides a two-rail structure capable of generating a plasma arc discharge displaceable along a closed path uninterruptedly. The uninterrupted movement of the arc discharge is achieved by a specific design of the main electrode. The electrode comprises an essentially tubular body having a first rim (3, 24, 33, 89) usually connected to a d.c. power source via at least one connector site (12), and a second, working rim (4, 27, 34, 46, 63, 78, 90) serving for the electric arc discharge. The tubular body is divided by at least one slot (gap) (6, 22, 32, 49, 52, 88) associated with one connector site and extending between the first and second rims so that it forms at the second rim region a second rim gap.