Preservice teachers' beliefs and values develop due to their long "apprenticeship of observation" (Lortie, 1975) and often filter their teacher education experiences (Feiman-Nemser & Buchman, 1986; Pajares, 1992). Case methods may be one curricular tool by which to instill change in preservice teachers' beliefs and values. This study investigated the...
Litter nutrient dynamics contribute significantly to biogeochemical cycling in
forest ecosystems. These dynamics may be influenced by site attributes, litter nutrient concentrations, and soil nutrient availability either independently or synergistically. Litter nutrient dynamics were examined in two decomposition studies in temperate coniferous forests of Oregon. I used ¹⁵N-labelled litter of...
Superwarfarins are anticoagulant rodenticides that are 100 times more potent and 15 times more persistent than warfarin. They have been used since the 1980s and cause over 10,000 cases of accidental and intentional poisonings per year. Apart from inducing uncontrollable bleeding, by inhibiting the vitamin K cycle, superwarfarins can disrupt...
Methods are presented to acquire data from analytical ultracentrifugation experiments
by computer using the absorption optical scanning system of the Beckman Model-E
ultracentrifuge. A computer program was written which analyzes sedimentation velocity
experiments by the van Holde - Weischet method and by the second moment method. The van
Holde -...
Evidence exists that links a sedentary lifestyle with the emergence of chronic
diseases during adulthood. Reports indicate that many children and adolescents already
have risk factors for chronic diseases and the prevalence of obesity among children is at
an all time high. There are concerns that children may not be...
The positions of the DNase I hypersensitive sites within the
galactose gene cluster of the yeast Saccharomyces cerevisiaa have
been determined. When yeast nuclei were incubated with DNase I, the
purified DNA restriction endonuclease digested and analyzed by
Southern hybridization, five hypersensitive regions were observed in
this cluster of three...
The Carnegie Ridge is a linear, aseismic, submarine ridge
lying between the Galapagos Islands and the coast of South America.
A 2300 meter deep saddle near 86°W. longitude divides the ridge into
western and eastern segments. Surface ship, near bottom, and grain
size studies from the saddle have been used...
Physical Activity (PA) has been shown to significantly improve the overall health of adolescents. The health dimensions that are positively influenced by a consistent level of PA are multiple and range from body composition, chronic diseases management (diabetes, cardiovascular disease, etc.), chronic pain, and mental health (depression, anxiety, etc.). The...
The primary purpose of this study was to determine the effects
of an interdependent group-oriented contingency on the MVPA
levels of middle school students during the fitness portion of physical
education lessons. Participants were randomly selected target
students from three intact eighth grade classes.
A combination of a delayed multiple...