Turn Down the Volume

Turn It Down a Notch

In the developing vertebrate embryo, segmentation initiates through the formation of repeated segments, or somites, on either side of the posterior neural tube along the anterior to posterior axis. The periodicity of somitogenesis is regulated by a molecular oscillator, the segmentation clock, driving cyclic gene expression in the unsegmented paraxial mesoderm, from which somites derive. Three ...

Signal Amplification: Let's Turn Down The Lights

G protein activation by membrane-bound receptors initiates a chain reaction that amplifies cellular responses to external signals. In retinal photoreceptors, amplification by the phototransduction cascade is regulated by quickly switching off the visual pigment that acts as the receptor for light.

FAA turns down the volume.

Administration (FAA), air traffic is expected to double nationally by the year 2017. Increased air traffic also means an increase in airplane noise. To help regulate the impact of noise on the environment, the FAA established the Airport Noise and Capacity Act in 1990, which required all civil jet aircraft over 75,000 pounds to reduce noise and lessen their environmental effects overall by 1 Ja...

Neural Energetics: Hungry Flies Turn Down the Visual Gain

Food-deprived flies reduce the gain of a visual-motion-sensitive interneuron whilst walking, and the optomotor reflex to which it contributes, providing evidence of coupling between nutritional state, behavior and neural activity.

Turning Down the Volume on Granular Materials