Number of Determinations

I. DETERMINATION OF NUMBER OF HYDROXYL GROUPS IN PHENOL. CjHjOH. Molecular Weight, 94. 

It must be stressed that the identification of the causative organism(s) may be extremely difficult since it often depends on the quantitative determination of numbers of each microbial type in a complex mixture together with an assessment of its chemical and physical activities in that particular environment. 

Determination of number o/per/ro/jenZ-exudative cells after i.p. (intraperitoneal) application of polysaccharide fractions and during infection with Y. pseudotuberculosis in experimental animals. 

Determination of Number of PEG Chains Linked to a Protein Molecule. This parameter was calculated by multiplying total number of amino groups on a particular protein by the fraction of amines that were consumed by the modification, which was measured by TNBS assay (28) or in some instances by fluorescamine assay (29). 

Mushak P, Crocetti AF. 1989. Determination of numbers of lead-exposed American children as a function of lead source Integrated summary of a report to the U.S. Congress on childhood lead poisoning. Environ Res 50 210-229. 

PL-3.2.1 Determination of Number of Buildings Intended for Human Occupancy... 

The determination of the molecular weight of nanoparticles is performed by gel permeation chromatography (GPC). The experimental setup consists of a high performance liquid chromatography system with a size exclusion column and a refractive index detector. The nanoparticles are usually freeze-dried and dissolved in tetrahydrofuran for analysis on the system. Poly(styrene) or poly(methylmethacrylate) standards are used to calibrate the column, to enable the determination of number average molecular weight (Mn), as in... 

Figure 11.15. Determination of number of plates by the McCabe-Thiele method (Example 11.8)...

ISO 580 1990 Injection-moulded unplasticized poly(vinyl chloride) (PVC-U) fittings -Oven test - Test method and basic specifications ISO 727-1 2002 Fittings made from unplasticized poly(vinyl chloride) (PVC-U), chlorinated poly (vinyl chloride) (PVC-C) or acrylonitrile/butadiene/styrene (ABS) with plain sockets for pipes under pressure - Part 1 Metric series ISO 727-2 2002 Fittings made from unplasticized poly(vinyl chloride) (PVC-U), chlorinated poly (vinyl chloride) (PVC-C) or acrylonitrile/butadiene/styrene (ABS) with plain sockets for pipes under pressure - Part 2 Inch-based series ISO 1163-1 1995 Plastics - Unplasticized poly(vinyl chloride) (PVC-U) moulding and extrusion materials - Part 1 Designation system and basis for specifications ISO 1163-2 1995 Plastics - Unplasticized poly(vinyl chloride) (PVC-U) moulding and extrusion materials - Part 2 Preparation of test specimens and determination of properties ISO 1265 1979 Plastics - Polyvinyl chloride resins - Determination of number of impurities and foreign particles... 

ISO 4602 1997 Reinforcements - Woven fabrics - Determination of number of yarns per unit length of warp and weft... 

TABLE 2 DETERMINATION OF NUMBER AVERAGE BY BENZYL PICOLYL MAGNESIUM IN MOLECULAR WEIGHTS OF BENZENE. POLY(2-VINYL PYRIDINE) INITIATED... 

The equilibrium curve also can be transformed into these coordinates. These transformations are useful for graphical determinations of numbers of theoretical trays rather than for determination of numbers of transfer units. Example 13.13 employs both sets of units. 

Determination of Number-Average Molecular Weights by Ebulliometry... 

Number Density and Volume Flux. The determination of number density and volume flux requires accurate information on the sample volume cross-sectional area, droplet size and velocity, as well as tine number of droplets passing through the sample volume at any given instant of time. Volume flux is the volume contained by the droplets passing through a unit cross-sectional area per unit interval of time. 

An apparently straightforward method for the determination of number and strength of acid sites consists of the determination of the amount of base required to poison catalytic activity for a model reaction. By means of plots of activity versus amount of added base, the number of acid sites is obtained from the threshold amount of base required to remove catalytic activity acid strength is gauged from the slope of the titration curve. This method can therefore be called a catalytic titration. 

Determinations of Numbers and Types of Essential Residues. Determining the number and types of essential residues in proteins has been approached by a number of methods (I). The simplest, but perhaps... 

FIGURE 7.8 Determination of number average molecular weight by osmometry. [Graph reconstructed from data by Roughton and Kendrew, Haemoglobin, Butterworth, London, 1949, p. 197.]... 

Table I. Macroeoulometric determination of number of electrons transferred (n) and amount of NHj evolved during electrochemical reduction of pyrimidone-2, cytosine and cytidine...

Determination of number of (chemically different) polypeptide chains or subunits in the protein. 

Nevertheless, the technique is slow, difficult and not amenable to automation [ 1]. The main disadvantages of algae determination in water by microscopy are [ 2 ] — the long time required for a proper microscopic determination of number concentration and volume, and the large variance usually associated with the results obtained ... 

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