Tungsten spectra

A second unusual EPR spectrum was observed in the oxidized (as-isolated) protein (Fig. 3). This spectrum, which was assigned to an S = z system, was not reminiscent of any Fe-S cluster. Indeed, with g-values of 1.968, 1.953, and 1.903, it looked more like a molybdenum or tungsten spectrum. However, chemical analysis ruled out the possibility that this EPR spectrum arose from Mo or W, and the spectrum was assigned to an Fe-S center instead. The spin concentration, however, was sub stoichiometric and sample-dependent. Furthermore, when the as-isolated protein was oxidized with ferricyanide, it became EPR silent. This, together with the iron determination and the fingerprint of the reduced protein, led Hagen and colleagues to the... 

Samples were tested on in a melt of salts (75% Na SO, 25% NaCl) at 950°C in an air atmosphere for 24 hours. Micro X-rays spectrum by the analysis found that the chemical composition of carbides of an alloy of the ZMI-3C and test alloys differs noticeably. In the monocarbide of phase composition of an alloy of the ZMI-3C there increased concentration of titanium and tungsten is observed in comparison with test alloys containing chemical composition tantalum. The concentration of more than 2% of tantalum in test alloys has allowed mostly to deduce tungsten from a mono carbide phase (MC) into solid solution. Thus resistance of test alloys LCD has been increased essentially, as carbide phase is mostly sensitive aggressive environments influence. The critical value of total molybdenum and tungsten concentration in MC should not exceed 15%. 

It follows from the spectrum of the electron energy losses that the hydrogen atom on the (110) face of a tungsten crystal participates in vibrations with frequencies 1310cm 820 cm and. 

In the continuous wave (CW) experimental setup a sample is constantly illuminated by a probe beam and the steady state change in the transmission is detected (see Fig. 7-1). An argon ion laser has been used to generate the pump beam and the probe beam was from an incandescent lamp (tungsten or others), producing a broad spectrum (0.5 to 5 pm) [6]. Both pump and probe beams are directed onto the sample film and the transmitted probe light is collected, filtered through a monochromator, and detected by a photodetector. Both the pump and the probe... 

Fig. 15-2. Contrast between the continuous spectrum of a hot tungsten ribbon and the line spectrum of a hydrogen discharge tube.

Fig. 5-3. The spectrum, recorded photographically, from a tungsten tube. The silver and bromine absorption edges due to the selective absorption by the chemicals in the film are clearly shown.

Background spectrum, tungsten, copper, and nickel lines in, 229 Backlash, error due to, 285-287 Bank notes, histograms from x-ray spec-trographic chart recordings of, 225-227... 

Interference filters with 7-17 nm band width Tungsten lamp [G] [LDi] [L-ns]12 Phototaxigraph (light trap). Rate photoaccumulation. Spectrum is relative response to that at 499 nm corrected for incident quanta Diehn and Tollin29)... 

DIBF has the absorbance spectrum shown in Figure 4. Coating mixtures containing this photoinitiator can be cured with an intense tungsten halogen lamp, such as a projector bulb. When DIBF is irradiated it forms an excited state which has a very low absorbance, i.e., it photobleaches (1). This allows light to penetrate deeply into the coating. 

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