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Full-Text Articles in Biochemistry, Biophysics, and Structural Biology

Behavior Patterns In Free-Ranging Black Rat Snakes, Charles Amlaner, James Withgott Aug 1997

Behavior Patterns In Free-Ranging Black Rat Snakes, Charles Amlaner, James Withgott

Charles J. Amlaner

While activity patterns of some animals are guided strictly by light-dark cycles or circadian rhythms, others show more flexible behavior. For ectothermic animals such as snakes, the temperature of their surroundings is a key factor in their physiology, behavior, and ecology. Various other factors, e.g., hunger, reproductive behavior, ecdysis, prey availability, and predation risk, also influence a snake's patterns of activity, often in conflicting and unpredictable ways. Studies of sleep patterns in such animals with variable and irregular activity may yield insights into the functions of sleep.


Ingredient Selection For Plastic Composite Supports For L-(+)-Lactic Acid Biofilm Fermentation By Lactobacillus Casei Subsp. Rhamnosus, K.L. Ho, A. L. Pometto Iii, P. N. Hinz, James S. Dickson, A. Demirci Jul 1997

Ingredient Selection For Plastic Composite Supports For L-(+)-Lactic Acid Biofilm Fermentation By Lactobacillus Casei Subsp. Rhamnosus, K.L. Ho, A. L. Pometto Iii, P. N. Hinz, James S. Dickson, A. Demirci

Food Science and Human Nutrition Publications

Plastic composite supports containing 50% agricultural products (oat hulls, soybean hulls, yeast extract, soybean flour, dried bovine erythrocytes, bovine albumin, and/or mineral salts) and 50% (wt/wt) polypropylene were produced by high-temperature twin-screw extrusion. The research employed two half sets of a five-factorial fractional design (2(5 - 1)) to evaluate the effects of different agricultural components on the properties of the plastic composite supports and to select the best plastic composite support formulation for lactic acid fermentation. The biofilm population was affected by the contact angle and relative hydrophobicity of the supports (r = 0.79 to 0.82). Lactic ...


A Study Of Biochemical And Haematological Variables With Performance In Showjumping Horses, Darren B. Simmons Jan 1997

A Study Of Biochemical And Haematological Variables With Performance In Showjumping Horses, Darren B. Simmons

Theses : Honours

This honours project examined the biochemical and haematological changes induced by exercise in the showjumping horse to determine whether a relationship exists between these values and performance. To complete this study 7 geldings and 1 stallion who were considered competition fit by their trainers were subjected to 2 forms of exercise. The first phase of this study involved an incremental exercise test performed at the Byford City Council horse training facility. The horses were cantered/galloped around a 1300m all weather training track at velocities of 6, 8, 10, and 12 m/sec for a duration of 2 minutes for ...


Pou Domain Genes And The Immunoglobulin Octamer Motif In Chickens , Lynn Marie Heltemes Jan 1997

Pou Domain Genes And The Immunoglobulin Octamer Motif In Chickens , Lynn Marie Heltemes

Retrospective Theses and Dissertations

This research was undertaken to test the hypothesis that multiple POU genes exist and that POU proteins are involved in transcriptional regulation in the chicken. The POU protein Oct-2 has been hypothesized to partially regulate immunoglobulin gene expression through its interaction with the octamer motif found in the promoter of immunoglobulin genes. Transcriptional regulation of immunoglobulin genes provides a model for tissue-specific gene expression in the immune system. In searching for a chicken Oct-2 homologue, two partial chicken POU domain genes were identified. A cDNA clone encoding the POU domain of Brn-3a was isolated and showed near identity to the ...


Description Of Tadpoles Of Three Species Of Scinax (Anura: Hylidae), Rafael O. De Sá, Rocjard Wassersig, Arturo I. Kehr Jan 1997

Description Of Tadpoles Of Three Species Of Scinax (Anura: Hylidae), Rafael O. De Sá, Rocjard Wassersig, Arturo I. Kehr

Biology Faculty Publications

Larval morphological characteristics have been used to cluster species of Scinax in seven species groups and to support the monophyly of some of these groups. However, our present knowledge of Scinax tadpoles is incomplete; currently, tadpoles of only 21 of the approximately 80 recognized species have been described. Herein, we describe and illustrate the external morphology and oral disc characteristics of larval Scinax berthae, S. nebulosa, and S. boesemani. The presence of a "labial arm" supporting the P3 tooth row in S. boesemani, and its absence from S. nebulosa, is discussed in the light of our limited knowledge of tadpoles ...