Tester Comparison

Brinell Tests of Steel Products Comparison Hardness Tester Practice Rockwell Test on Cemented Carbides Rockwell Test for Sintered Materials Knoop Test for Electrodeposited Coatings Webster Hardness Gauge Barcol Test of Aluminum Alloys... 

Acetone cyanohydrin nitrate should be regarded as a moderately explosive material and should be handled carefully and distilled behind a safety shield. For purposes of comparison, the drop-weight sensitivities on the Olin-Mathieson drop-weight tester of three materials are propyl nitrate, 10 kg.-cm. acetone cyanohydrin nitrate, 40 kg.-cm. nitromethane, 60 kg.-cm. 

A direct comparison of the results obtained by the simplified shear cell methodology and the Flowfactor Tester of Jenike and associates is difficult since the experimental procedures differ. Figures 10 and 11 show the yield loci obtained using both methods. For free flowing spray-dried lactose the yield loci are very similar (Fig. 10) and nearly linear, as is generally observed [45]. Bigger... 

Wilcox, R, Naidoo, A., Wedd, D.J. and Gatehouse, D.G. (1990). Comparison of Salmonella Typhimurium TA102 with Escherichia coli WP2 tester strains. Mutagenesis 5 285-291. 

Figure 12 Comparison of release of salbutamol from an MR product under simulated fasted and fed conditions using the BioDis (USP Type 3 tester) apparatus. Triangle corresponds to simulated fasted state and circles to simulated fed state.

Gee, R, Sommers, C.H., Melick, A.S., Gidrol, X.M., Todd, M.D., Burris, R.B., Nelson, M.E., Klemm, R.C. Zeiger, E. (1998) Comparison of responses of base-specific Salmonella tester strains with the traditional strains for identifying mutagens the results of avahdation study. Mutat. Res., 412, 115-130... 

Packard, V. S., Jr., Ginn, R. E. and Rosenau, J. R. 1973. A comparison of Babcock, Mojonnier, and Milko tester Mark III methods in the analysis of milkfat in cream. J. Milk Food Technol. 36, 523-525. 

The properties of a material and, hence, the test results obtained will depend on the processing used to produce the test material or product. Frequently, this is beyond the control of the tester and he or she is only required to characterise the samples received. Nevertheless, if any controlled comparison is to be made it is essential that the test material is produced in exactly the same way. Similarly, any preparation which is performed on the material to produce the test pieces is likely to influence the results. Consequently, it is highly desirable that preparation is standardised and comparisons only made between test pieces produced in the same way, including the direction within the sheet that test pieces were cut. Standard procedures are discussed in chapter 4. 

It is to some extent pointless to compare abrasion testers except in the context of their correlation with a particular product and service condition. If a general comparison is attempted, this will inevitably be subjective. However, it can be commented that the DIN abrader has become increasingly popular and is very convenient for routine control use. The... 

Ed. McNaughton and the Staff of Chemical Engineering. New York McGraw-Hill. Kamath, S., Puri, V. M., Manbeck, H. B. and Hogg, R. (1993). Flow Properties of Powders Using Four Testers Measurement, Comparison and Assessment. Powder Tech., 76,277. 

When dealing with small volumes, a fairly common approach has been to take the glass vessel and reduce its size to 100-200 mL, and to also scale down the size of the paddle shaft or basket shaft and baskets accordingly (Fig. 11.1). In most cases, the modified and smaller vessels are configured within the standard dissolution tester. Table 11.1 provides a comparison between standard USP dissolution Apparatus 2 and minidissolution assembly. Because the minidissolution assembly is not compendial, chemical and mechanical calibration procedures should be developed for performance verification. 

Two modes of operation are possible in applying a load to an agglomerate. With an automated tester the more common procedure is to move the platens at a constant rate this is a constant deformation rate tester (CDRT). A second mode is possible in which the compressive force on the agglomerate is increased at a constant rate this is a constant loading rate tester (CLRT). Cahn and Karp inski [29] provide an interesting comparison of these two modes of operation and conclude that the CLRT should be used when accuracy and precision are emphasized whereas the CDRT will suffice for routine testing. 

Fig. 6 Comparison of two different theoretical extinction lines with measurements carried out in a reaction vessel shown in fig.1. Kinetic data for eq. 3 are taken from Tester et al. [6] ...

Mallinckrodt (1992) TechneScan MAG3 product information. Malinckrodt, Phillipsburg, NJ Russel CD, Thorstad B, Tester MV, Stutzman M, Baker T, Dubovsky EV (1988) Comparison of tech-netium-99m MAG3 with iodine-131 hippuran by a simultaneous dual channel technique. J Nucl Med 29 1189-1193... 

Despite intensive efforts only Zipperling has recently succeeded [66] in putting commercial applications for conductive polymers into practice (with one exception a small rechargeable button cell for a solar-powered circuit tester [25], although its performance data are very modest by comparison with existing competing accumulators [26], so that it was withdrawn soon after its market introduction). 

Comparison with NiOi Cure Tester Results... 

A comparison of mutagenic activity using normal and nitroreductase-deficient bacteria provides a method for detection and identification of nitroaromatic mutagens. But this idea is complicated by the existence of several bacterial nitroreductases with differing specificities (11). Three different nitroreductase-deficient derivatives of the normal tester strain TA98 were obtained from Dr H. S. Rosenkranz at Case Western University who has isolated and characterized these strains. Strain TA98NR was selected for its resistance to the nitrocompound niridazole and subsequently found to be resistant to the mutagenicity of niridazole, and also to that of the nitrofurans, nitronaphthalenes, and nitrofluorene (3). It is also resistant to 1-nitropyrene and a number of other nitro-PAH... 

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