THE method for determining the concentration gradient in the ultra-centrifuge cell has to be chosen differently according to the different properties of the solution centrifuged, and the different ...

All straight line graphs have an equation that can be written in the form 𝑦 equals 𝑚𝑥 add 𝑐, where 𝑚, the coefficient of the 𝑥 term, is the gradient or slope of the line. The constant, 𝑐, is ...

Morphogens are secreted signalling molecules that organize a field of surrounding cells into patterns. They form a gradient of concentration emanating from a localized source, and determine the ...