Prolonged or perpetual growth of replacement teeth in the rock hyrax.

Tusks are ever-growing teeth present in mammals of the clade Paenungulata. Unlike the perpetually growing incisors of rodents, tusks are not used in mastication, and in at least some paenungulatans, the tusk is composed of dentin alone in adults. Few studies have provided tissue-level information on tusks of adult paenungulatans with embedding techniques that identify epithelial and other soft tissues.

Adsorption Modes of Na, Li, and Mg to a Model Zwitterionic Lipid Bilayer.

The adsorption of ions to soft-porous interfaces plays a critical role in many physical and biological processes, such as the function of electrochemical energy storage devices or the attachment of membrane proteins to cell surfaces. In this work, we characterize different adsorption modes and describe the adsorption behavior of Na, Li, and Mg onto a porous substrate. We identify three categories of adsorption based on the degree of dehydration of the ion, viz.

A descriptive cross-sectional online survey of nursing and midwifery students and graduates' readiness to provide unplanned pregnancy and abortion care.

Background: Our understanding of how nursing and midwifery students in Australia are prepared to support people in unintended pregnancy prevention and care is currently limited.

Objective: This study examined Australian nursing and midwifery students and recent graduates' perspectives on their preparation and confidence in providing unintended pregnancy prevention and care.

Methods: A descriptive, cross-sectional online survey of nursing and midwifery students and graduates was undertaken.

Combining sterile insect releases with refuge areas to delay the evolution of resistance to Bt sugarcane: an agent-based modeling approach.

The strategic use of refuge areas is a well-known method for delaying the development of pest resistance to Bacillus thuringiensis (Bt) crop. A lesser-known method to control against resistance development is sterile insect releases. In this article, an agent-based simulation model is used to test the effectiveness of combining the use of Bt sugarcane, refuge areas, and sterile insect releases as an integrated strategy against Eldana saccharina Walker (Lepidoptera: Pyralidae) infestation and resistance development.

Evolutionary divergence of facial muscle physiology between domestic dogs and wolves.

Domestic dogs (Canis familiaris) are descended from gray wolf (Canis lupus) populations that inhabited Western Europe and Siberia. The specific timing of dog domestication is debated, but archeological and genetic evidence suggest that it was a multi-phase process that began at least 15,000 years ago. There are many morphological differences between dogs and wolves, including marked divergence in facial muscle morphology, but we know little about the comparative physiology of these muscles.