Indicators are substances that change colour when they are added to acidic or alkaline solutions. Universal indicator is the indicator most commonly used in the laboratory. If universal indicator ...

Litmus indicator solution turns red in acidic solutions ... These are the important points about the pH scale: neutral solutions are pH 7 exactly acidic solutions have pH values less than 7 ...

The consensus process was conducted between June 2012 and October 2013. Each candidate indicator on the Delphi survey questionnaire was rated using a 5-point Likert-type rating scale. Agreement was ...

OBJECTIVE To develop and validate a scale suitable for use in clinical practice as a tool for assessing prolonged pain in premature infants. METHODS Pain indicators identified by observation of ...