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Early Growth

For reactions of the type A + B = AB (or a+P = y), the situation is different. If one has a linear reaction geometry and the y product forms at different times and locations on the A/B interface, the patches of y eventually merge by fast lateral (interface) transport. Eventually, a full y layer is formed between a and / . At first, this layer has a non-uniform thickness (Fig. 6-4). In Chapter 11 we will show, however, that the uneven a/y and y/p interfaces are morphologically stable and become smooth during further growth. This leads to constant boundary conditions for the y formation after some time of reaction and eventually results in a parabolic rate law, as will be discussed later. [Pg.143]

In summary, the nucleation rate R (t) is difficult to assess and kinetic theories for transforming systems often assume (ad hoc) R (t) dependencies. In contrast, the growth kinetics of an individual particle of p precipitate in the supersaturated matrix (a) is a transport problem with well defined boundary conditions, as long as [Pg.143]

Equation (6.11) is valid for the initial particle growth. Interface control of the growth kinetics would lead to a linear rate law. Details can be found, for example, in [H. Schmalzried (1981)]. [Pg.144]

Let us define X = X as the portion of the system that has already transformed into 0 and X° = (1 -X) as the untransformed fraction. The reaction rate as referred to untransformed a is [Pg.144]

Unless we deal with autocatalytical reactions, the function f(t) must decrease with time. From Eqn. (6.12) it can be seen that f(t) is the (normalized) increase of the product at time t. For spherical product particles, this means [Pg.144]


BE-5249 Optimization of methodologies to predict crack initiation and early growth In comoonents under comolex creeo-fatiaue loadina tC FAT) Dr. S. Holdsworth GEC ALSTHOM Ltd... [Pg.936]

A. M. Kierzek, W. M. Wolf, P. Zielenkiewicz. Simulations of nucleation and early growth stages of protein crystals. Biophys J 75 571, 1997. [Pg.929]

A. R. Nerheim, E. K. Samuelson, and T. M. Svartaas. Investigation of hydrate kinetics in the nucleation and early growth phase by laser light scattering. In Proceedings Volume, volume 1, pages 620-627. 2nd Soc Offshore Polar Eng et al Offshore Polar Eng Int Conf (San Francisco, CA, 6/14-6/19), 1992. [Pg.440]

Ohlsson, T., Smith, H. G., Raberg, L., and Hasselquist, D. 2002. Pheasant sexual ornaments reflect nutritional conditions during early growth. Proc. R. Soc. Lond. B 269 21-27. [Pg.508]

Adverse effects on reproduction, early growth, and development... [Pg.1152]

Nagasawa, S., M. Kondo, and M. Kasuya. 1981. Concentration of PCP inhibiting the development of roots at the early growth stage of rice and the difference of susceptibilities in varieties. Bull. Fac. Agric. Shimane Univ. 15 101-108 (in Japanese, English summary). [Pg.1231]

TF transcription factor, R receptor, Fur ferric uptake regulation protein, NF-kB nuclear factor-kB, AP-1 activator protein-1, Egr-1 early growth response-1, VDR la,25-dihydroxy-vitamin D3 receptor, RXR retinoid X receptor, PPARy peroxisome proliferator-activated receptor y NFAT nuclear factor of activated T-cells, HSF heat shock factor, p53 tumor suppressor p53, HIF-1 hypoxia inducible factor-1. ... [Pg.331]

Burrows WC, Larson WE (1962) Effect of amount of mulch on soil temperature and early growth of corn. Agron J 54 19-23... [Pg.254]

Duchenne muscular dystrophy dimethyl formamide 5,5-dimethyl-1 -pyrroline-1 -oxide deoxynucleic acid diphenylene iodonium endothelium-derived relaxing factor epidermal growth factor early growth phase response gene ethyleneglycol- bis- (p- aminoethyl)-N,N,N, N -tetraacetic acid... [Pg.315]

Reduced germination and inhibition of radicle growth Causes morphological deformities in germinating medic seedlings by interfering with cell division and early growth of meristems... [Pg.159]

Bioassav of Organic Compounds from the Soil. Bioassay experiments measured the germination and early growth (generally the most sensitive time of any plant s life) of wheat. The methods are similar to those of McPherson and Muller (151 and others in the field, and are summarized below. [Pg.373]

Sanchez, A., Rubano, D. A., Shavlik, G. W., Hubbard, R., and Horning, M. C. (1988). Cholesterolemic effects of the lysine/arginine ratio in rabbits after initial early growth. Arch. Latinoam. Nutr. 38, 229-238. [Pg.245]


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