The majority of research in environmental education (EE) has focused on measuring knowledge, attitudes, and behavior using quantitative tools and methods. Few studies have attempted to elicit and characterize children's conceptions of the environment or nature, particularly those resulting from a residential EE experience, which contextualize knowledge, attitudes, and may...
Problem-based learning (PBL) is one type of inquiry-based learning. Many community college instructors use inquiry-based learning as an instructional strategy. There is much literature on the use of problem-based learning in undergraduate, graduate and medical school education, with a multitude of examples of specific techniques and problems to be addressed,...
Four experimental groups were designed to examine the effects of a "greens" dietary supplement (wheat clippings), as well as individual versus group-housing, on the adrenal and reproductive physiology of Microtus canicaudus. Organ culture of adrenal glands, thin-layer chromatography, and fluorescence analysis of steroid-containing medium were used to quantitatively assess adrenal...
The taxonomic status of Microtus canicaudus was compared
with that of a morphologically similar vole, Microtus montanus. Four
means of comparison were utilized: hybridization experiments, comparative
karyology, growth distinctions (total length and body weight),
and qualitative behavioral observations. The hybridization experiments
indicated that, while the incidence of pregnancy of M....
Agonistic behavior among three species of Microtus live-trapped
near Corvallis, Oregon was recorded in order to interpret habitat
segregation by the species in areas of syrnpatry. The method used to
measure agonistic interaction was similar to that of Colvin (1970).
Agonistic behavior was recorded under red light in a neutral...
The gray-tailed vole (Microtus canicaudus) demonstrated a
requirement for selenium and vitamin E. Animals deficient in both
nutrients suffered from liver necrosis and an unthrifty condition
characterized by inappetence, profuse diarrhea, and swollen eyes.
Vitamin E appeared less effective than selenium as a prophylaxis
against this syndrome.
Total body weights,...
Exposure to a strange male increased the sexual development of
18-day-old females to a greater extent than did exposure to either
young or adult females. Reproductive tract weights, mean diameters
of Graafian follicles, and incidence of vaginal estrus were all
greater in the male-exposed group during either the first or...
A study was performed to assess the uptake and retention patterns
of cesium-134 in the gray-tailed vole, Microtus canicaudus Miller. To
furnish a realistic source of contaminated food for the voles, wheat
seedlings were raised in hydroponic solutions to provide radiocesium
labeled wheat clippings. The hydroponic system was designed to...
The testes of the gray-tailed vole (Microtus canicaudus Miller) exhibited a high affinity for selenium relative to other selected tissues. Uptake of selenium-75 in the testis-epididymis complex was delayed relative to uptake by the whole body, kidney, and liver. This pattern of uptake suggested that selenium was metabolically incorporated into...