Stressed in Alaska

Alaska

Stressed mucosa.

Stress has been defined as an acute threat to the homeostasis of the organism. The mucosal lining of the gastrointestinal tract, a single layer of epithelial cells held together by tight junctions, provides a barrier between the external environment and the body's internal milieu. Any mechanism that breaches the tight junction exposes the body to foreign material be it protein, microorganisms o...

Divergence problem in Alaska

Eliminating the “divergence problem” at Alaska’s northern treeline M. Wilmking and J. Singh Institute of Botany and Landscape Ecology, Grimmer Strasse 88, Greifswald University, 17487 Greifswald, Germany Received: 3 June 2008 – Accepted: 5 June 2008 – Published: 11 June 2008 Correspondence to: M. Wilmking ([email protected]) Published by Copernicus Publications on behalf of the Europea...

Acoustoelastic anomaly in stressed heterostructures

We investigated the influence of stress on the acoustic wave propagation in single crystalline heterostructures using a transfer matrix method. Both Rayleigh-type and Sezawa modes exhibit an acoustoelastic anomaly, where the stress-induced change of the phase velocity is maximum for finite film thicknesses, considerably smaller than the acoustic wavelength. For Ge/Si~001! compressed by 1 GPa th...

Stressed-out podocytes in diabetes?

Diabetic nephropathy is the most common cause of ESRD in the United States.1 Although current strategies can slow disease progression,2,3 development of renal failure requiring renal replacement therapy is a distressingly common outcome in patients with diabetes.1 As a result, much effort has been devoted to understanding the mechanisms that promote glomerular damage in diabetic kidney disease ...