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Selection factors

Now that we have defined capacity factor, selectivity, and column efficiency we consider their relationship to chromatographic resolution. Since we are only interested in the resolution between solutes eluting with similar retention times, it is safe to assume that the peak widths for the two solutes are approximately the same. Equation 12.1, therefore, is written as... [Pg.556]

Example 1 Sizing a Dish Filter Eqiiipmeut physical factors, selected from Table 18-9 Maximum effective siihmergeuce = 28% maximum portion of filter cycle available for dewatering = 45%. (High submergence versions require tninnion seals, and their use is hmited to specific apphcations.)... [Pg.1703]

Example 2 Sizing a Drum Belt Filter with Washing Equipment physical factors, selected from Table 18-9 Maximum effective submergence = 30% max. apparent suhm. = 35% max. arc for washing = 29% portion of cycle under vacuum = 75%. [Pg.1704]

Each topology has predictable voltage and current stresses for the power switches and rectifiers. These estimates have about a 90 percent confidence factor. Selecting the power devices at this stage in the design cycle can save precious time later in the program by not having to wait for parts. Table 3-2 contains equations that may be conservative in nature, but will work in the application. [Pg.35]

Table II shows, as an example, the combinations of low and high levels for three factors selected by a design team for an accelerated test Involving photovoltaic solar cells. In column 2 the three factors are seen to be temperature T (50 C, 95 C), relative humidity RH (60%, 85%), and ultraviolet radiation UV (five suns, 15 suns). The eight combinations of the high and low levels are shown, together with the predicted months to failure for each combination. In this example the documentation to support each prediction is symbolically referenced as shown in the last column. The documentation includes assumptions, calculations, references to the literature, laboratory data, computer simulation results, and other related material. Such a factorial table is first completed by each scientist independently. Subsequently, the team alms to generate a single consensus factorial table has the same form as that shown in Table II. Table II shows, as an example, the combinations of low and high levels for three factors selected by a design team for an accelerated test Involving photovoltaic solar cells. In column 2 the three factors are seen to be temperature T (50 C, 95 C), relative humidity RH (60%, 85%), and ultraviolet radiation UV (five suns, 15 suns). The eight combinations of the high and low levels are shown, together with the predicted months to failure for each combination. In this example the documentation to support each prediction is symbolically referenced as shown in the last column. The documentation includes assumptions, calculations, references to the literature, laboratory data, computer simulation results, and other related material. Such a factorial table is first completed by each scientist independently. Subsequently, the team alms to generate a single consensus factorial table has the same form as that shown in Table II.
Following are some examples of safety factors selected by choosing from the comparative table of LC50, LVE, MVE and IDLH substances, which are hardly, moderately and highly toxic. The vapour pressures of the substances come from the tables in Part Three, the estimation techniques in paragraph 1.1.2 should be applied, if need be. [Pg.135]

By convention, the adjusted retention tine or the capacity factor ot the later of the two eluting peaks is made the numerator in equation (1.10) the s junration factor, consequently, always has values greater than or equal to 1.0. The separation factor is a measure of the selectivity of a chromatographic systn. The separation factor is sometimes called the selectivity factor, selectivity or relative retention. [Pg.528]

The system selected here was also a tablet formulation. The five independent variables or formulation factors selected for this study are shown in Table 2. The dependent variables are listed in Table 3. Since each dependent variable is considered separately, any number could have been included. [Pg.615]

Factors Selected to Represent the Inherent Safety in Preliminary Process... [Pg.41]

The membrane performance for separations is characterized by the flux of a feed component across the membrane. This flux can be expressed as a quantity called the permeability (P), which is a pressure- and thickness-normalized flux of a given component. The separation of a feed mixture is achieved by a membrane material that permits a faster permeation rate for one component (i.e., higher permeability) over that of another component. The efficiency of the membrane in enriching a component over another component in the permeate stream can be expressed as a quantity called selectivity or separation factor. Selectivity (0 can be defined as the ratio of the permeabilities of the feed components across the membrane (i.e., a/b = Ta/Tb, where A and B are the two components). The permeability and selectivity of a membrane are material properties of the membrane material itself, and thus these properties are ideally constant with feed pressure, flow rate and other process conditions. However, permeability and selectivity are both temperature-dependent... [Pg.330]

The damping factors take into account 1) the mean free path k(k) of the photoelectron the exponential factor selects the contributions due to those photoelectron waves which make the round trip from the central atom to the scatterer and back without energy losses 2) the mean square value of the relative displacements of the central atom and of the scatterer. This is called Debye-Waller like term since it is not referred to the laboratory frame, but it is a relative value, and it is temperature dependent, of course It is important to remember the peculiar way of probing the matter that EXAFS does the source of the probe is the excited atom which sends off a photoelectron spherical wave, the detector of the distribution of the scattering centres in the environment is again the same central atom that receives the back-diffused photoelectron amplitude. This is a unique feature since all other crystallographic probes are totally (source and detector) or partially (source or detector) external probes , i.e. the measured quantities are referred to the laboratory reference system. [Pg.105]

This value is, in a strict sense, no longer a RBE but a weighting factor (selected of course on the basis of RBE data) applied to compensate for RBE dilferences/variations. It is the RBE weighting factor, Rrbe-... [Pg.754]

THE COLUMNS OF CONTRAST COEFFICIENTS FOR THE THREE-FACTOR INTERACTIONS OF THE HALF-FRACTION FACTORIAL DESIGN FOR FOUR FACTORS SELECTED FROM TABLE 3.8... [Pg.98]

All analytical methods involve some kind of sample preparation and thus the type of factors selected for a HPLC method as shown in Table 5.2 are similar for all methods. However, different stages in the preparation will be more critical for some methods. For instance, derivatisation will be more common for gas chromatography methods and hence more critical. [Pg.201]

Transcription initiation in procaryotes is controlled via promoters and regulatory DNA sequences located near the promoter. The role of the promoter is to provide a defined association site for the RNA polymerase and to correctly orient it. The binding of the RNA polymerase to its promoter is controlled by the sigma factor, a component of the RNA polymerase holoenzyme. The sigma factor selects which genes are to be transcribed by specifically recognizing the promoter sequence and structure and by allowing the RNA polymerase to form a transcription-competent complex at the transcription start site. [Pg.35]

Given that extruders of various designs, types and geometries are available in the marketplace, let us examine some aspects that drive selection of the appropriate extruder for a product. The key factors relevant in selecting the extruders are formulation factors (selection of excipients, thermal stability, plasticity, aqueous solubility, and moisture holding capacity) and equipment factors (batch versus continuous operation and scalability of the extruder). [Pg.340]


See other pages where Selection factors is mentioned: [Pg.301]    [Pg.290]    [Pg.599]    [Pg.142]    [Pg.328]    [Pg.319]    [Pg.319]    [Pg.23]    [Pg.533]    [Pg.164]    [Pg.240]    [Pg.70]    [Pg.134]    [Pg.1103]    [Pg.161]    [Pg.75]    [Pg.187]    [Pg.360]    [Pg.225]    [Pg.89]    [Pg.29]    [Pg.227]    [Pg.388]    [Pg.30]    [Pg.120]    [Pg.150]    [Pg.146]    [Pg.301]    [Pg.68]    [Pg.168]   


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Alkenes selectivity factors

Capillary column selection factors

Chemical reaction processes factor range selection

Chromatographic theory selectivity factor

Chromatography properties selectivity factor

Chromatography selectivity factor

Coatings selection factors

Coatings selection factors application properties

Coatings selection factors costs

Coatings selection factors maintenance

Column factors affecting selection

Column selectivity factor (

Commercial products, selection factors

Concentration factors affecting method selection

Contaminant selectivity factors

Cracking selectivity, influencing factors

Design and Selection Factors

EGFR (epidermal growth factor inhibitor selectivity

Effectiveness factor selectivity considerations

Enantioselectivity selectivity factor

Ensemble Selection Factors

Factor selection case studies

Factor selection method development

Factor selection mixture-related factors

Factor selection quantitative factors

Factors Affecting International Supplier Selection

Factors Determining the Selection of Fillers and Fibers

Factors affecting selection

Factors determining AO selection

Factors for Selecting a Cleaning Method

Factors governing selectivity in formation of protecting groups

Factors governing selectivity in removal of protecting groups

Factors in Control-Equipment Selection

Factors in pump selection

Factors in selecting natural colours

Factors in selection

Factors influencing the selection of clay modifiers

Factors range selection

Factors that control retention and selectivity

Factors to Be Considered for Selection of Fuel

Factors to Consider in Pilot-Site Selection

Factors to Consider when Selecting a Method

Fiber selection factors

Filters factors when selecting

Franck-Condon factors vibronic selection rules

Fuel selection, considering factors

Growth factors species selection

Guidance for the selection of a factor analysis method

Host selection chemical factors

Host selection environmental factors

Host selection physical factors

Hydrocarbon oxidation, factors affecting selectivity

Hydrogen sulfide selectivity factor

Implementation site selection factors

Interspecies assessment factor, selection

Isomerization selectivity factor

Kinetic selectivity factor

Material selection influencing factors

Materials selection factors

Matrix selection factors

Oligosaccharide synthesis by selective NodRM-IV factor

Operating Principles Design and Selection Factors

Parallel factor analysis selection

Pilot testing site selection factors

Process selection influencing factors

Program selection factors

Program selection factors treatments

Programmed factors affecting selectivity

Reactor selection engineering factors

Reactor selection environmental factors

Selected Conversion Factors

Selected fundamental constants and conversion factors

Selecting the Number of Independent Variables (Factors)

Selection Factors 1 Selectivity

Selection drug factors

Selection factors, filter media

Selection host factors

Selection of Factors, Levels and Basic Level

Selection of factors

Selection of factors for other analytical methods

Selection of the factors

Selection pathogen factors

Selection procedure production factors affecting

Selection rules factor

Selectivity Factor 1 - Electron Density

Selectivity Factor 2 - Polarisability

Selectivity factor

Selectivity factor

Selectivity factor species specificity

Selectivity factor, chiral selectors

Selectivity factors affecting

Selectivity, factors controlling

Selectivity, steric factors influence

Sensor selectivity factors influencing

Separation (or selectivity) factor between two solutes

Shape selectivity factors influencing

Site selection, factors affecting

Size reduction equipment, selection factors

System selection factors

Thermodynamic equilibrium selectivity factor

Waste selection factors considered

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