Factor combinations

Figure 10-140 is used for determining the friction factor (dimensional) for segmental type baffles. The loss across the tube bundle and through the baffle window is represented in the combined factor, f, which is to be used with the equation for pressure drop. ... 

An imbalance profile can be excited due to the combined factors of mechanical imbalance, lift/gravity differential effects, aerodynamic and hydraulic instabilities, process loading, and, in fact, all failure modes. 

Piagentini, A.M., Guemes, D.R., and Pirovani, M.E., Sensory characteristics of fresh-cut spinach preserved by combined factors methodology, J. Food Sci., 67, 1544, 2002. 

It is possible to use such a conversion factor, but it is advisable while you are learning to use the factors involved with moles to use as few different ones as possible. That way, you have to remember fewer. Also, in each conversion you will change either the unit (mass - moles) or the chemical (CaCO, - O atoms) in a factor, but not both. Many texts do use such combined factors, however. 

Antihemophilic factor-human recombinant heavy and light chains combination (factor VIII) produced in CHO cells... 

Factor deficiencies include disorders of fibrinogen such as afibrinogenemia and dysfibrinogenemias, prothrombin deficiency, factor V VII, X, XI, XII, and XIII deficiency, prekallikrein and high-molecular-weight kininogen deficiency, combined factor deficiencies, a2 anti-plasmin deficiency, a] antitrypsin Pittsburgh, and protein Z deficiency. 

Combination Factor A Factor B Factor C Yield % w/w Effect Significance 95%... 

Combination Factor Factor Factor Yield Effect Significance... 

Several combined factors lead to this conclusion. They include ... 

Calculate the combined factors for buildings and auxiliaries, fAB. from Equation 2.13.9. 

Obtain fAB, the combined factors for buiidings and auxiliaries, from Equation 2.15.8. 

Other studies evaluated for interspecies dose-response relationships by these workers, primarily between rats and humans, included metals (Evans et al. 1944, as cited in Dourson and Stara 1983), pesticides (Hayes 1967, as cited in Dourson and Stara 1983), arsenic and fluorine (Lehman and Fitzhugh 1954). Dourson and Stara (1983) concluded that although separate factors of 10-fold for interspecies and intraspecies response adjustments for chronic data appeared reasonable, more experimental data were needed. They believed that intermediate UFs of less than 10-fold for individual factors or less than 100-fold for combined factors could be used to estimate the ADI and may be developed on a logarithmic scale (e.g., 31.6 being halfway between 10 and 100 on a logarithmic scale). 

The analysis of toxicity data in terms of speciation products is a difficult task since the variables, species activities, usually are numerous and often are Interrelated. Factor Analysis allows one to determine a small number of statistically independent, linear combinations of activities (factors). Correlation of these combinations (factors) with toxicity allows discrimination to be m.ade between toxic and non-toxic species. 

To highlight the combined factors of ring size and endo-exo double bonds, we have assembled heats of formation in Figure 7 (data are scanty). On thermochemical grounds we see that endo-6 should be favoured over exo-5 and exo-6 should be... 

Loose contamination on the surface of solid objects should be treated as a powder, and as the form factor for a powder is much higher than that for the solid it is associated with (0.1 compared with 10 ), the results will be sensitive to assumptions made about the inventory of the loose contamination. Such assumptions must be explicit and defensible. The bulk item that has been contaminated would then be treated independently. Alternatively, a combined factor for powder plus solid can be derived. 

Franke, R., Gruska, A. and Presber, W. (1994). Combined Factor and QSAR Analysis for Antibacterial and Pharmacokinetic Data from Parallel Biological Measurements. Pharmazie, 49, 600-605. 

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