P diffusion

Mitra, PP Sen, PN Schwartz, LM Le Doussal, P, Diffusion Propagator as a Probe of the Structure of Porous Media, Physical Review Letters 68, 3555, 1992. 

Trinh, S Locke, BR Arce, P, Diffusive-Convective and Diffusive-Elechoconvective Transport in Non-Uniform Channels with Application to Macromolecular Separations, Separation and Purification Technology 15, 255, 1999. 

Details of the extended triple zeta basis set used can be found in previous papers [7,8]. It contains 86 cartesian Gaussian functions with several d- and f-type polarisation functions and s,p diffuse functions. All cartesian components of the d- and f-type polarization functions were used. Cl wave functions were obtained with the MELDF suite of programs [9]. Second order perturbation theory was employed to select the most energetically double excitations, since these are typically too numerous to otherwise handle. All single excitations, which are known to be important for describing certain one-electron properties, were automatically included. Excitations were permitted among all electrons and the full range of virtuals. 

The calculation performed for the metastable N (ls2s) + He system has necessitated somewhat larger Cl spaces (200-250 determinants) in order to reach the same perturbation threshold ri = 0.01, the la molecular orbital being not frozen for this calculation.The basis of atomic orbitals has been also expanded to a 10s6p3d basis of gaussian functions for nitrogen reoptimized on N (ls ) for the s exponents and on N (ls 2p) for the p exponents and added of one s and one p diffuse functions [22]. For such excited states,... 

Thc energies of the electronic transitions are labelled according to the parent symmetry of the excited states. P refers to the free ion term which contributes mostly to the indicated state. bThc conditions under which the electronic spectra were obtained S, solution P, diffuse reflectance C, single crystal. 

The conditions under which the electronic spectra were obtained S, solution P, diffuse reflectance C, single crystal. 

A typical result is shown in Figure 18, with micrographs showing variations of stacking faults inside a narrow P-diffused region and the enhance-... 

Figure 18. Micrographs showing variation of stacking faults inside a narrow phosphorus diffusion region and the slight enhancement of arsenic diffusion and retardation of antimony diffusion. P diffusion was at 1150 °C for 60 min. (Reproduced with permission from reference 24. Copyright 1987 The Electrochemical Society, Inc.)...

This result agrees well with the observed value of 6.62 eV and supports the notion that the reduced diffusion of Sb is a result of a reduced vacancy population caused by self-interstitial generation from the P-diffused layer. 

In addition to generating excess self-interstitials, high-concentration P diffusion also causes the local equilibrium vacancy concentration to increase. Nishi et al. (49) showed that significant enhancement of Sb diffusion occurs inside the highly doped P profile, a result suggesting a strong enhancement of the vacancy concentration there. 

Lee, P. Diffusion-controlled matrix systems, in Kydonieus, A. (ed.), Treatise on Controlled Drug Delivery Fundamentals, Optimization, Applications. New York Marcel Dekker, 1992, pp. 155—198. 

Maines A, Ashworth D, Vadgama P. Diffusion restricting outer membranes for greatly extended hnearity measurements with glucose oxidase enzyme electrodes. Analytica Chimica Acta 1996, 333, 223-231. 

Physical or material properties density p, diffusivity D and kinematic viscosity v The corresponding dimensional matrix can be written as... 

A14. Armitage, J. O., Dick, F. R., and Corder, M. P., Diffuse histiocytic lymphoma after histologic conversion A poor prognostic variant. Cancer Treat. Rep. 65, 413—418 (1981). 

Brody, J.P., Yager, P., Diffusion-based extraction in a microfabricated device. Sensors Actuators A 1997, 58, 13-18. 

Weigl, B.H., Holl, M.R., Schutte, D., Brody, J.P., Yager, P., Diffusion-based optical chemical detection in silicon flow structure. Micro Total Analysis Systems 96, Proceedings of 2nd International Symposium on pTAS, Basel, 19-22 Nov. 1996, 174-184. 

Shewmon, P. Diffusion in Solids, The Minerals, Metals, and Materials Society, Warren-dale, PA, 1989. 

Gao, P. and Fagerness, P., Diffusion in HPMC gels. I. Determination of drug and water diffusivity by pulsed-field-gradient spin-echo NMR, Pharmaceutical Research, Vol. 12, No. 7, 1995, pp. 955-964. 

Meares, P. Diffusion of allyl chloride in polyvinyl acetate. I. The steady state of permeation. J. Polymer Sci. 27, 391 (1958a). 

Chemical and isotopic exchange between fluid and crack walls mobile elements include alkalis, alkaline earths, Mn, Cu, Zn, P. Diffusion important... 

Barrie JA, Levine JD, Michaels AS, and Wong P. Diffusion and solution of gases in composite rubber membranes. Trans. Faraday Soc. 1962 59 869-878. 

Gekas, V., Tragardh, G., and Aimar, P., Diffusive flows in ultrafiltration and their effect on membrane retention properties, J. Membr. Sci., 80, 73, 1985. 

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