منابع مشابه
Sleep: Switching Off the Off-Switch
What are the synaptic drives controlling the sleep-wake circuitry in the mammalian brain? In a new study it was found that GABAergic cells in posterior lateral hypothalamus inhibit sleep-promoting anterior hypothalamic cells to cause waking, whereas their inhibition augments sleep.
متن کاملSwitching off photosynthesis
Sometimes the elementary experiment can lead to the most surprising result. This was recently the case when we had to learn that so-called "photosynthetic slugs" survive just fine in the dark and with chemically inhibited photosynthesis. Sacoglossan sea slugs feed on large siphonaceous, often single-celled algae by ingesting their cytosolic content including the organelles. A few species of the...
متن کاملShear strength properties of wet granular materials.
We investigate shear strength properties of wet granular materials in the pendular state (i.e., the state where the liquid phase is discontinuous) as a function of water content. Sand and glass beads were wetted and tested in a direct shear cell and under various confining pressures. In parallel, we carried out three-dimensional molecular dynamics simulations by using an explicit equation expre...
متن کاملIntracellular Signalling: Switching off signals
In hematopoietic cells, the protein tyrosine phosphatase PTP1C appears to play a central role in the termination of signalling by receptors that activate protein tyrosine kinases.
متن کاملSwitching myelination on and off
Schwann cells are remarkably plastic cells that can both form and stably maintain myelin sheaths around axons and also rapidly dedifferentiate upon injury. New findings (Parkinson, D.B., A. Bhaskaran, P. Arthur-Farraj, L.A. Noon, A. Woodhoo, A.C. Lloyd, M.L. Feltri, L. Wrabetz, A. Behrens, R. Mirsky, and K.R. Jessen. 2008. J. Cell Biol. 181:625-637) indicate that the transition between these di...
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ژورنال
عنوان ژورنال: Nordic Pulp & Paper Research Journal
سال: 2019
ISSN: 2000-0669,0283-2631
DOI: 10.1515/npprj-2018-0074