Home > Iowa Academy of Science > Journals & Newsletters > Iowa Science Teachers Journal > Volume 11 > Number 3 (1974)
Cover - Iowa Science Teachers Section Officers & Regional Directors - Front Matter - Table of Contents
Iowa Science Teachers Journal
© Copyright 1974 by the Iowa Academy of Science
"Cover - Iowa Science Teachers Section Officers & Regional Directors - Front Matter - Table of Contents,"
Iowa Science Teachers Journal: Vol. 11:
3, Article 1.
Available at: https://scholarworks.uni.edu/istj/vol11/iss3/1
Per table of contents page: This month's cover shows two views of an unusual chloroplast-a supergranalchloroplast from virus-infected plant cells. The upper micrograph is a normal electron microscope view of one of these chloroplasts magnified 39,000 times. The lower micrograph shows one of these chloroplasts following freeze-fracture preparation and is magnified 65,000 times. The freeze-fracture technique reveals the interior surfaces of the membranes within the chloroplast and the characteristic particles associated with these surfaces. (Photographs by Dr. Richard Sjolund and Dr. Donna D. Smith)