Spin speed, effect

RF pulse and spinning speed effects/ (iv) When the second-order quadrupolar interaction is much smaller than the chemical shift anisotropy, the quadrupolar parameters can be estimated by monitoring the frequency shift of the centre band as a function of the Bo field and the chemical shift anisotropy can be determined by Herzfeld—Berger sideband analysis/ We shall discuss the applicabihty of these methods to Co systems in turn. 

Fig. 11. Effect of spinning speed on properties of nylon-6 fibers, where (T) is the tangent modulus (° ), the tenacity and (A ), the elongation. To convert...

If j Rf is exactly the magic angle and infinite spinning speed is assumed, the first-order anisotropic terms are zero for both single and DQ coherence (33). This does not hold true for finite spinning speed, but a complete averaging of the first-order effect occurs at the exact rotor cycles. Therefore, the x evolution time has to match exactly a multiple of the rotor period. The second-order anisotropy refocusing occurs for... 

With the abundance of wash process signals mentioned here it is fair to say that this information can only be evaluated effectively with a fully electronic program control. From the actual wash requirements and the information registered, an optimal process sequence is worked out and then set automatically, taking into account important parameters such as wash and spin speeds, program duration, water levels and number of rinses. 

Figure 12.9 Effect of spinning speed on fiber orientation and shrinkage [14]. From Brunnschweiler, D. and Hearle, J. (Eds), Polyester - 50 Years of Achievement, 1993, p. 193, and reproduced by permission of The Textile Institute, Manchester, UK...

Adopting 60-mm [2.4-in.] cyclones, which operate at lower spin speeds for the same flow rate, resulted in smaller centrifugal separation forces. This probably results in a less dense central core, which requires a higher reject ratio to allow complete oil removal. Additionally, the TLP crude exhibits a high tendency to foam, which, when combined with the flash gas that exists preferentially in the reject stream, creates a foamy gassy mixture. This in effect reduces the Vortoil capacity because the flow rate needs to be limited to reduce Ato ensure that sufficient driving force exists. 

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