Programmed cell death is a normal aspect of neuronal development. Typically, twice as many neurons are generated than survive. In extreme cases, all neurons within a population disappear during embryogenesis or by early stages of postnatal development. Examples of transient neuronal populations include Cajal-Retzius cells of the cerebral cortex and Rohon-Beard cells of the spinal cord. The nove...

After injection of horseradish peroxidase into single blastomeres in Xenopus embryos at 2- to 512-cell stages, all of the descendants could be traced and counted at tailbud stages. Progenitors of Rohon-Beard neurons and of primary spinal motoneurons were identified, and all neurons of each type that originated from individual progenitors were counted. From these data were derived the geometric ...

Before Justin Kurzel’s 2019 adaptation of Peter Carey’s 2001 Booker Prize winning The True History the Kelly Gang came out, almost a dozen films had already been made about outlaw Ned Kelly. Raising money for new film seemed like an impossible task. What untold aspects are there this story? Kurzel, as Carey, was not interested in telling how it really was. Rather he became history can be "stole...

Vol. 27, No. 5, 2015 635 Received October 27, 2014, Revised December 5, 2014, Accepted for publication December 15, 2014 Corresponding author: Do Won Kim, Department of Dermatology, Kyungpook National University Hospital, 130 Dongdeok-ro, Jung-gu, Daegu 41944, Korea. Tel: 82-53-420-5838, Fax: 82-53-426-0770, E-mail: [email protected] This is an Open Access article distributed under the terms of t...

A new Lyp<~ of variable-stroke c·o"'rressor, he1Jceforth referred to as the Beard-Pennock compressot•, is presented in this papc1·. Th" stroke is ~.djusted by changing Lhe lengLll of the ground link using a.n auxiliary mcclnllti;,m. AJjustin[\ Lhe ground link, dta.nges Lhe rotation angle and the el\cctiv~ lengtL of' tl1e <:ounecting rod, which in Lurn controls the pumping volume of the compress...