Sentence examples for testing of the ph from inspiring English sources
Regarding the three methods for testing the PH assumption presented in this paper, we suggest the supremum test or the weighted Schoenfeld residuals for diagnostic testing of the PH assumption to determine if a fixed covariate can be used in a Cox PH model.
Testing of the pH sensitivity of ligand binding indicated that, as with human LSECtin, the binding activity of mouse LSECtin is enhanced at low pH.
However, if one is interested in examining the nature of age-related heterogeneity or evaluating the PH assumption with a time-varying covariate, we recommend modeling RCS and performing the hierarchical testing of the PH assumption by first determining whether the covariate of interest is associated with the event.
Battery-powered portable pH meters are widely used for field tests of the pH of soils; such tests may also be performed, less accurately, by mixing indicator dyes in soil suspensions and matching the resulting colours against a colour chart calibrated in pH.
The tests of the pH effect on the above-mentioned heavy metal ion sorption were carried out for MBC1 and MBC2.
In order to understand the influences of admixtures on the soil properties, tests of the pH value, Atterberg limits, compaction, California bearing ratio (CBR), unconfined compressive strength, and triaxial compression were performed on those samples.
The tests of the PH assumption indicated significant global deviations and significant deviations for some of the factors in some of the models.
A standard test of the PH assumption for the model in the validation dataset with a single predictor (the PI) using scaled Schoenfeld residuals suggests some breach of the PH assumption (P = 0.03).
To this end, we have used a new, flexible spline-based model that permitted testing of the conventional PH and linearity assumptions, and accounting for their violations (Abrahamowicz and MacKenzie, 2007).
If you're over the idea of professional soil testing, you can easily test the pH of your soil at home, but understand that it won't be as accurate as a professional reading.
Odor pairings for the differential conditioning paradigms were intended to produce a modest, ecologically valid offset in ph and to test both ends of the ph range, so either ph = 0.1 was conditioned with ph = 0.3, or ph = 0.9 with ph = 0.7.
