Although the results were quite similar under all pH conditions, alkaline pH was selected as it permitted ease of operation and lower operational costs due to the elimination of pH adjustment stages.
So, with the view of increasing the extraction efficiency of morphine, codeine, and methadone in the pH 9.8, this pH was selected as optimum for extraction of the opioids from postmortem urine samples (Fig. 2).
As a result, the neutral pH was selected as the appropriate pH for per run.
However, the structural rearrangements during formation of the W+-state are likely to be subtle, and it is likely that the two pH points selected in this early study (pH 8 and 4) are insufficient for characterizing a detailed picture of low pH-induced structural change of the T domain.
Tumor variables (grade and volume), extracellular pH (pHe), T(2) relaxation times, intracellular pH, and selected phosphometabolite ratios were examined for correlation with clinical outcome.From 39 dogs, pHe was a predictor of metastasis-free survival (MFS), with hazard ratio (HR, 0.29; P = 0.005) and overall survival (OS) with (HR, 0.36; P = 0.013).
However, values of pH were selected at 2 to simulate heavily polluted wastewater and pH 7 for studying wastewater under normal environmental conditions.
CSL and initial pH were selected as the critical factors using Plackett Burman design.
Gradient time, temperature and pH were selected as the factors of a full factorial design.
The concentration of phosphate, applied voltage, organic modifier content and buffer pH were selected as variable parameters.
