Rubin number

Clearly, the smaller is the gold or rubin number, the more effective is the biopolymer at shielding the dispersion from coagulation by electrolytes. To describe this shielding phenomenon, Zsigmondy coined the term protective colloid ( Schutzkolloide ), which functions by protective action. From the results recorded in Table 2.1, it can be inferr that sodium casemate is considerably more effective in its protective action than is, say, dextrin or potato starch. Note that both of these latter polymers are nonionic in character. 

Biopolymer Gold number (mg/lOcm ) Rubin number (g/10 cm )... 

As in the case of pH effects and concentration effects, the effects of electrolytes on dye spectra can sometimes be minimized by the addition of surface active agents or protective colloids. The efficacy of the latter to resist the coagulant effect of ionic strength upon the dye Congo rubin is measured as Congo Rubin Number. ... 

Table 7 gives a fev values of the gold numbers and oi anaiogously defined silver numbers, rubin numbers (sol of congorubin) sulphur numbers, Prussian blue-numbers and iron oxide-numbers ... 

Cubic equations, although simple and able to provide semiquantitative descriptions of real fluid behavior, are not generally useful for accurate representation of volumetric data over wide ranges of T and P. For such appHcations, more comprehensive expressions with large numbers of adjustable parameters are needed. 7h.e simplest of these are the extended virial equations, exemplified by the eight-constant Benedict-Webb-Rubin (BWR) equation of state (13) ... 

The controhing effect of various ions can be expressed in terms of thermodynamic equhibria [Karger and DeVivo, Sep. Sci., 3, 393 1968)]. Similarities with ion exchange have been noted. The selectivity of counterionic adsorption increases with ionic charge and decreases with hydration number [Jorne and Rubin, Sep. Sci., 4, 313 (1969) and Kato and Nakamori, y. Chem. Eng. Japan, 9, 378 (1976)]. 

Random maps have been studied by a large number of different authors, including Kruskal [krus54], Rubin and Sitgreaves [rubin54], Pittel [pittel83] and Kolchin [kolc86]. 

Beginning in the late 1980s, a number of groups have worked to develop reactive transport models of geochemical reaction in systems open to groundwater flow. As models of this class have become more sophisticated, reliable, and accessible, they have assumed increased importance in the geosciences (e.g., Steefel et al., 2005). The models are a natural marriage (Rubin, 1983 Bahr and Rubin, 1987) of the local equilibrium and kinetic models already discussed with the mass transport... 

Synonyms AI3-015101 BRN 0744602 CCRIS 3742 Desmodur T80 2,4-Diisocyanato-l-methylbenzene Diisocyanatoluene 2,4-Diisocyanotoluene Hylene T Hylene TCPA Hylene TLC Hylene TM Hylene TM-65 Hylene TRF Isocyanic acid, methylphenylene ester Isocyanic acid, 4-methyl-/ 3-phenylene ester 4-Methylphenylene diisocyanate 4-Methylphenylene isocyanate Mondur TD Mondur TD-80 Mondur TDS Nacconate 100 NCI-C50533 Niax TDI Niax TDI-P NSC 4791 NSC 56759 RCRA waste number U223 Rubinate TDI 80/20 TDI 2,4-TDI TDI-80 Toluene 2,4-diisocyanate Tolyene-2,4-diisocyanate Tolylene-2,4-diisocyanate 2,4-Tolylene diiso-cyanate /n-Tolylene diisocyanate UN 2078. 

As already said, Taylor s effective model contains a contribution in the effective diffusion coefficient, which is proportional to the square of the transversal Peclet number. Frequently this term is more important than the original molecular diffusion. After his work, it is called Taylor s dispersion coefficient and it is generally accepted and used in chemical engineering numerical simulations. For the practical applications we refer to the classical paper (Rubin, 1983) by Rubin. The mathematical study of the models from Rubin (1983) was undertaken in Friedman and Knabner (1992). 

Many developments have been made in the use of statistics to aid in experimental design over the last decades. The most important aspect of experimental design methods is that they provide a mathematical framework for changing all pertinent factors simultaneously, and achieve this in a small number of experiments. The description of such methods, though, is beyond the scope of this book and the reader is referred to the literature (Box et al., 1978 Bayne and Rubin, 1986 Haaland, 1989 Morgan, 1991) or to the internet for the latest design software (e. g. StatSoft, 1999). 

Rubin Walls provide a conceptual discussion of the anagenesis and the neogenesis of the chromophores of vision as understood up to 196993. It makes interesting reading but includes a large number of conflicts enumerated by the authors. It deviates from the common assumption of a Schiff base connecting the retinoid to the opsin, based on... 

A number of factors have been shown to alter the rate of excretion of chromium in humans. Intravenous injection of calcium EDTA resulted in a rapid increase in the urinary excretion of chromium in metal workers (Sata et al. 1998). Both acute and chronic exercises have been shown to increase chromium excretion in the urine, though the increased excretion did not appear to be accompanied with decreased levels of total native chromium (Rubin et al. 1998). An increased rate of chromium excretion has been reported in women in the first 26 weeks of pregnancy (Morris et al. 1995b). Chromium supplementation did not appear to alter the rate of excretion into breast milk in postpartum women (Mohamedshah et al. 

ISOCYANIC ACID, METHYLPHENYLENE ESTER -METHYL-m-PHENYLENE DDSOCYANATE METHYLPHENYLENE ISOCYANATE MONDUR-TD MON-DUR-TD-80 NACCONATE-100 NIAX ISOCYANATE TDI RCRA WASTE NUMBER U223 RUBINATE TDI... 

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