def supplements(parms, countrate=None):
    u"""Supplementary parameters:
        Effective number of freely diffusing particles in 3D solution:
        [9]  n3D = n*F
        Effective number particles diffusing on 2D surface:
        [10] n2D = n*(1-F)
    """
    n = parms[0]
    F3d = parms[3]
    Info = list()
    Info.append([u'n3D', n * F3d])
    Info.append([u'n2D', n * (1.0 - F3d)])
    if countrate is not None:
        cpp = countrate / n
        Info.append([u'cpp [kHz]', cpp])
    return Info
