Publications by authors named "N A Greenblatt"
Article Synopsis
- Small apes like gibbons and siamangs are monogamous and experience strong social bonds, making them sensitive to the loss of a group member, which can trigger stress.
- Glucocorticoids (GCs) are often used to measure stress, but combining them with dehydroepiandrosterone-sulfate (DHEAS), a hormone that regulates stress responses, gives a clearer picture.
- Research involving two zoo-housed northern white-cheeked gibbons after a death in their group showed increased stress indicators in the adolescent male, highlighting the importance of measuring both FGCMs and DHEAS for understanding stress levels.
We investigate the dynamics of fracture in drying films of colloidal silica. Water loss quenches the nanoparticle dispersions to form a liquid-saturated elastic network of particles that relieves drying-induced strain by cracking. These cracks display intriguing intermittent motion originating from the deformation of arrested crack tips and aging of the elastic network.
View Article and Find Full Text PDFDrying aqueous suspensions of monodisperse silica nanoparticles can fracture in remarkable patterns. As the material solidifies, evenly spaced cracks invade from the drying surface, with individual cracks undergoing intermittent motion. We show that the growth of cracks is limited by the advancement of the compaction front, which is governed by a balance of evaporation and flow of fluid at the drying surface.
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