Does the pH of the grape seed extract interfere in the biomodification capacity of dentin collagen?

The aim of this study was to verify the biomodifying action of 6.5% grape seed extract solutions, with different pH, when applied on dentin collagen. Dentin bars (1.

Testing the genomic overlap between intraspecific mating traits and interspecific mating barriers.

Differences in interspecific mating traits, such as male sexual signals and female preferences, often evolve quickly as initial barriers to gene flow between nascent lineages, and they may also strengthen such barriers during secondary contact via reinforcement. However, it is an open question whether loci contributing to intraspecific variation in sexual traits are co-opted during the formation and strengthening of mating barriers between species. To test this, we used a population genomics approach in natural populations of Australian cricket sister species that overlap in a contact zone: and First, we identified loci associated with intraspecific variation in mating signals: advertisement song and cuticular hydrocarbon (CHC) pheromones.

Can recent evolutionary history promote resilience to environmental change?

Principles of social evolution have long been used retrospectively to interpret social interactions, but have less commonly been applied predictively to inform conservation and animal husbandry strategies. We investigate whether differences in developmental environment, facilitated by divergent social conditions, can predict resilience to environmental change. Upon exposure to harsh novel environments, populations that previously experienced more benign social environments are predicted either to suffer fitness losses (the "mutation load hypothesis" and "selection filter hypothesis") or maintain fitness (the "beneficial mutation hypothesis").