Doane College 2 articles published in JoVE Chemistry Inkjet Printing All Inorganic Halide Perovskite Inks for Photovoltaic Applications Dylan Richmond1, Mason McCormick2, Thilini K. Ekanayaka3, Jacob D. Teeter2, Benjamin L. Swanson1, Nicole Benker3, Guanhua Hao3, Sharmin Sikich4, Axel Enders5, Alexander Sinitskii2, Carolina C. Ilie1, Peter A. Dowben3, Andrew J. Yost3 1Department of Physics, State University of New York-Oswego, 2Department of Chemistry, University of Nebraska-Lincoln, 3Department of Physics, University of Nebraska-Lincoln, 4Department of Chemistry, Doane University, 5Physikalisches Institut, Universität Bayreuth A protocol for synthesizing inorganic-lead-halide hybrid perovskite quantum dot inks for inkjet printing and the protocol for preparing and printing the quantum dot inks in an inkjet printer with post characterization techniques are presented. Biology Using Flatbed Scanners to Collect High-resolution Time-lapsed Images of the Arabidopsis Root Gravitropic Response Halie C Smith*1, Devon J Niewohner*1, Grant D Dewey*1, Autumn M Longo*1, Tracy L Guy1, Bradley R Higgins2, Sarah B Daehling1, Sarah C. Genrich1, Christopher D Wentworth2, Tessa L Durham Brooks1 1Department of Biology, Doane College, 2Department of Physics, Doane College This protocol describes a process for rapid collection of images of Arabidopsis seedlings responding to a gravity stimulus using commercially-available flatbed scanners. The method allows for inexpensive, high-volume capture of high-resolution images amenable for downstream analysis algorithms.