Direct visual inspection

Over time, statisticians have devised many tests for the distributions of data, including one that relies on visual inspection of a particular type of graph. Of course, this is no more than the direct visual inspection of the data or of the calibration residuals themselves. However, a statistical test is also available, this is the x2 test for distributions, which we have previously described. This test could be applied to the question, but shares many of the disadvantages of the F-test and other tests. The main difficulty is the practical one this test is very insensitive and therefore requires a large number of samples and a large departure from linearity in order for this test to be able to detect it. Also, like the F-test it is not specific for nonlinearity, false positive indication can also be triggered by other types of defects in the data. 

Meldal et al. developed a novel protease assay based on the long-range resonance energy transfer (FRET) [25] fluorescence quenched (EQ) pair 3-nitrotyro-sine/2-aminobenzoic acid. This served to characterize enzyme specificity by direct visual inspection of the resin beads (33). 

The colonies are counted by direct visual inspection after incubation in the sealed protective wrapper. The microbial count is to be stated with reference to the sampling volume. The microbial count (CPUs) corresponding to the selected sample should be recorded as CFUs/sample volume). For calculation of CPUs per volume, the following formula is applied. 

Direct visual inspection of Fig. 4 shows that, an astonishingly much larger amount of energy is consumed in the laminated material at moderate tension. The reason for this could be that the extension of LDPE requires multiple fracture of the Al-foil or delaminating. Multiple fracture of the Al-foil would consume a large amount of energy. 

OH defonnation vibration can be found in the region 1410 - 1260 cm . Strong C-0 valence vibrations between 1150 and 1040 cm" overlap with aromatic fingerprint bands at 1225 - 950 cm". CH3 symmetric deformation vibrations occur in the region 1370 - 1190 cm". Ofter authors ascribe the 1049 cm-1 region to C-OH and C-C stretching mode (27, 28). However, it is not excluded that the FTIR spectra may contain useful information located in too weak peaks not visible by direct visual inspection. More specific chemical and spectroscopic application knowledge is required to fully interpret this plot. 

Geological data observations cover many different aspects such as observations of lithology, fracturing, alteration, mineralisation, tectonic indications, and hydraulic indications from flow etc. The tools for observing these characteristics are both by direct visual inspection and using indirect tools, such as various types of geophysical logging tools, packer tests, down-hole cameras, radar and seismics. 

Screening for blood Chemical testing for blood or traces of blood is often needed to provide physical evidence in cases in which direct visual inspection is not a decisive proof. 

Jin D. Y., J. A. Piper. Time-Gated Luminescence Microscopy Allowing Direct Visual Inspection of Lanthanide-Stained Microorganisms in Background-Free Condition, Anal. Chem., 83, 2294— 2300 (2011). 

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