Compound Annual Growth Rate (CAGR) The compound annual growth rate (CAGR) is a useful measure of growth over multiple time periods. It can be thought of as the growth rate that gets you from the initial investment value to the ending investment value if you assume that the investment has been compounding over the time period.
In an ELISPOT assay, the membrane surfaces in a 96-well PVDF-membrane microtiter plate are coated with capture antibody that binds a specific epitope of the cytokine being assayed.ypically 200,000 - 400,000 PBMC will be used per well for an assay, but up to one million cells are commonly used for detection of rare events. ELISPOT is capable of detecting a single antigen positive cell within this population, giving it a theoretical low limit of detection of one in one million cells.
Positive Economics refers to a science which is based on data and facts. Normative economics is described as a science based on opinions, values and judgement. Positive economics is descriptive, but normative economics is prescriptive. Positive economics explains cause and effect relationship between variables.