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UPS in the gas phase, IPREM, Pau, France, Dr. JM Sotiropoulos, CNRS. The ultraviolet photoelectron spectroscopy (UPS) was pioneered by Feodor I. Vilesov, a physicist at St. Petersburg (Leningrad) State University in Russia (USSR) in 1961 to study the photoelectron spectra of free molecules in the gas phase.
To measure wavelengths above 650 nm, the bottom of the instrument is opened, and a red filter and a red-sensitive photocell is installed. [ 11 ] : 7 The original design of the Spectronic 20 utilized an analog dial [ 19 ] for readout of transmission from 100%T to 1%T (top scale), [ 2 ] 0A - 2A (lower scale).
A boiling tube is essentially a scaled-up test tube, being about 50% larger. They are designed to be wide enough to allow substances to boil violently as opposed to a test tube, which is too narrow; a boiling liquid can explode out of the end of test tubes when they are heated, as there is no room for bubbles of gas to escape independently of ...
P&IDs are originally drawn up at the design stage from a combination of process flow sheet data, the mechanical process equipment design, and the instrumentation engineering design. During the design stage, the diagram also provides the basis for the development of system control schemes, allowing for further safety and operational ...
They typically consisted of a tube tester atop a locked cabinet of tubes, with a flip chart of instructions. One would remove the tubes from a malfunctioning device, such as a radio or television, bring them to the store, and test them all, looking up the instructions from the part number on the tube and the flip chart.
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