Richardson, Edward

Values of Dr can be calculated from the change in shape of a pulse of tracer as it passes between two locations in the bed, and a typical procedure is described by Edwards and Richardson(27). Gunn and Pryce(28), on the other hand, imparted a sinusoidal variation to the concentration of tracer in the gas introduced into the bed. The results obtained by a number of workers are shown in Figure 4.6 as a Peclet number Pe = ucd/eDL) plotted against the particle Reynolds number (Re c = ucdp//j ). 

Figure 4.6. Longitudinal dispersion in gases in packed beds. ER—Edwards and Richardson B — Blackwell etalS29 CB — Carberry and Bretton(32) DW—de Maria and White(33) MW—McHenry and Wilhelm(34) SP—Sinclair and Potter 35) EK — Evans and Kenney(36>, N2 + He...

Working on modifications of trehalose, Richardson (with P.A. Monroe and Les Hough) demonstrated the selective tosylation at 0-2 of 4.6.4. 6 -di-(9-benzylidene-a,a-trehalose to afford a symmetrical 2,2 -ditosylate, which could be converted into the bis-manno-epoxide by the action of base (Scheme 24). The latter underwent trans-diaxial ring-opening with nucleophiles at C-3 and C-3, and many synthetic applications of this intermediate have now been recorded. One of these is shown in Scheme 24, from the Richardson-Hough laboratory, performed by postdoctoral fellow, Edward Tarelli, who contributed voluminously with Richardson to the exploration and development of trehalose chemistry. 

R. G. Edwards, L. Hough, A. C. Richardson, and E. Tarelli, A reappraisal of the selectivity of the DMF-mesyl chloride reagent. Chlorination at secondary positions, Tetrahedron Lett. (1973) 2369-2370. 

Gas-solid fixed beds For axial dispersion in gas-solid fixed beds, the Edwards-Richardson correlation can be used (Wen and Fan, 1975 Andrigo et al., 1999). 

In Figure 3.36, the Edwards-Richardson and Hiby correlations are compared for gas-solid systems, while in Figure 3.37, the Edwards-Richardson and Kubo conelations are compared for gas-solid and liquid-solid systems, respectively. 

Figure 3.36 Edwards-Richardson versus Hiby s correlation (for s = 0.45 and Sc= 1).

Figure 3.37 Comparison of Edwards-Richardson and Kubo correlations (for s = 0.45, for liquid Sc = 1000 and for gas Sc = 1).

The Reynolds number is 4.56 and using the Edwards-Richardson correlation (eq. (3.317)) the particle Pec let number is found equal to 2.18 and thus, the bed Pec let number is 2179, which is fairly high and the plug-flow condition is assured. 

From Table 1-15 of Appendix I, we find that the diffusion coefficient of toluene in air is 8.7 X 10-6 m2/s. Then, using the properties of ah at 25 °C (Table 1-6, Appendix I), we find that Sc = 1.74 and Rep = 6.92, and using the Edwards-Richardson correlation (eq. (3.317)) the particle Peclet number is found to be 1.98 and thus, the bed Peclet number is 609.2, which is fairly high, and plug-flow condition can be assumed. 

Many patients remarked on the tendency of opiates to diminish sexual appetite, and for Richardson this fact seemed to be consistent with the lack of ambition and planning that he saw in many of the patients he interviewed. A few patients, like Zachary Edwards, were singled out as being particularly effeminate in appearance and manner. However, Richardson s reluctance to discuss homosexual behavior in any explicit way undoubtedly prevented patients from volunteering any such encounters. 

As with Edwards, Richardson also revealed much of himself in his physical description of Miller ... 

Nikolov, A.D. Wasan, D.T. Huang, D.W. Edwards, D.A. The Effect of Oil on Foam Stability Mechanisms and Implications for Oil Displacement by Foam in Porous Media in Proc. 61st Ann. Tech. Conf. SPE, Society of Petroleum Engineers Richardson, TX, 1986, paper SPE 15443. 

Richardson JH, Edwards AJ, Cruickshank JK, Rudge P, Dalgleish AG (1990) In vivo cellular tropism of human T-cell leukemia virus type 1. J Virol 64 5682-5687. 

Edwards AD, Wyatt JS, Richardson C, Potter A, Cope M, Delpy DT, Reynolds EO. Effects of indomethacin on cerebral haemodynamics in very preterm infants. Lancet 1990 335(8704) 1491-5. 

J. S. Wyatt, M. Cope, D. T. Delp, C. E. Richardson, A. D. Edwards, S. Wray, and E. 0. Reynolds, Quantitation of Cerebral Blood Volume in Human Infants by Near-Infrared Spectroscopy, J. Appl. Physiol., 68, 1086 (1990). 

Phosphorus chemistry and biochemistry are enormous topics, and obviously this essay touches on only a few aspects of the subject many other aspects are discussed in detail in this volume by others. This introduction to the symposium is built around the commanding importance of electrostatics in the chemistry and biochemistry of phosphates and phosphites, but that emphasis necessitated omitting a discussion of many other topics. These include, for example, pseudorotation in the hydrolysis of cyclic esters of phosphorus, a fascinating topic to which Edward Dennis and David Gorenstein and others in my laboratory have made significant contributions (28). The brilliant work of Usher, Richardson and Eckstein (29) which (if you will pardon a pun) ushered in the determinations of the stereochemistry at phosphorus in the reactions of phosphate esters, has been omitted, as has the work of Jeremy Knowles (30) and his coworkers, who demonstrated how to use 0 6, 0 7 and 0 8,... 

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