Hormones play key, functional roles in mediating the tradeoff between survival and reproduction. Glucocorticoid hormones can inhibit reproduction and improve chances of survival during periods of stress. However, glucocorticoid hormones are, at times, also associated with successfully engaging in energetically costly courtship and mating behaviors. Corticosterone (CORT), a primary glucocorticoi...

Five new species of Thyridopyralis Dyar, 1901 from Brazil are described, including diagnosis and illustrations: bonita Becker, sp. n., T. leucophthalma minor proxima n. viridescens n.; the range gallaerandialis is extended to Mexico Antilles (Guana Id., British Virgin Islands).

To develop a nisin- and lysozyme-based antimicrobial treatment for use with processed ham and bologna, in vitro experiments were conducted to determine whether inhibition enhancing interactions occur between the antimicrobials lysozyme, chrisin (a commercial nisin preparation), EDTA, NaCl and NaNO(2). Inhibitory interactions were observed between a number of agents when used against specific pa...

The adhesion of lactic acid bacteria (LAB) to the intestinal mucosa is one of the criteria in selecting for probiotics. Eighteen LAB were isolated from porcine intestinal mucin (PIM): ten strains of Lactobacillus, six strains of Weissella, and two strains of Streptococcus. Using sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) for phosphate-buffered saline (PBS) extracts fro...

The eastern newt, Notophthalmus viridescens, is widely distributed in eastern North America and has been divided into four subspecies. These subspecies differ geographically in morphology and life history, suggesting that the subspecies represent locally adapted and differentiated entities between which gene flow is significantly reduced. We investigated the relationships among subspecies by as...

In its response to light of approximately 11.3 m.c. intensity Diemyctylus viridescens may be either positive or negative. Negative phototropism is characteristic of animals from which food has been withheld. Feeding suppresses this negative phototropism.