509682.fig.001
Figure 1: Cosmic microwave background anisotropies. With small dash symbol are the WMAP 7 years experimental observations [53]. We have plotted several cases in which the Newton constant has been modified. The standard case is shown with a small dash line. With a long dash line is shown an effective gravitational constant, . With a dotted line is shown the case with , and with a dash-dotted line is shown the case with .