2694 20160701171709.0 10.1051/eas/1571026 DOI ASTROimport-851 Hrivnak, B. J. 2015 A Radial Velocity and Light Curve Study of Pulsations and Binarity in Proto-Planetary Nebulae We have investigated pulsations and searched for binarity in 7 bright proto-planetary nebulae. All are found to pulsate, with dominant periods of 39-132 days. However, no strong evidence of binarity is found in any of them. This implies that any binary companion must have either a very long period (>30 yr) or low mass (0.2 Msun). This appears to rule out Roche lobe overflow as a contribution to the shaping of the surrounding nebula. Lu, W. Van de Steene, G. Van Winckel, H. Sperauskas, J. Bohlender, D. EAS Publications Series 71 2015 127-128 http://esoads.eso.org/abs/2015EAS....71..127H published in NONREF