1School of Dentistry, University of California Los Angeles, 10833 Le Conte Ave., Los Angeles, CA 90095, USA 2Department of Pharmaceutical and Biomedical Sciences, Touro College of Pharmacy, New York, 230 W 125th St., New York, NY 10027, USA *Corresponding author Xuesong He, DDS, PhD Assistant Adjunct Professor School of Dentistry University of California Los Angeles 10833 Le Conte Ave., Los Ang...

BACKGROUND The essential role of glucose transporter 2 (GLUT2) in glucose homeostasis has been extensively studied in mammals; however, little is known about this important protein in lower vertebrates. The freeze-tolerant wood frog (Rana sylvatica), which copiously mobilizes glucose in response to freezing, represents an excellent system for the study of glucose transport in amphibians. METH...

The wood frog ( Rana sylvatica) is a freeze-tolerant species that encounters subzero temperatures during its winter breeding season, whereas the leopard frog ( R. pipiens) is freeze intolerant and breeds in spring. Osmotic and freezing tolerances of spermatozoa from these species were inferred from spermolysis rate, integrity of the plasma membrane as judged using vital dye assay, and motility ...

la morphologie, c’est l’étude des formes ou bien la mise en place des éléments constitutifs du conte. le travail de vladimir propp consiste à étudier non pas le contenu des contes folkloriques mais le contenant, c’est-à-dire la forme extérieure des contes et leur structure globale. ainsi, l’analyse de le petit poucet et de le chat botté fait appel à une logique fictionnelle propre au merveilleu...

Experiments are described in which eggs of Rana species were treated prior to insemination with antisera prepared against oviducal materials of Rana, Bufo, and Ambystoma species. Three types of treatment with antisera were employed. Eggs of Rana pipiens and R. clamitans were treated with antisera against materials prepared from whole oviducts, or from upper and lower segments of oviducts, of R....