cell membrane


  • WordNet 3.6
    • n cell membrane a thin membrane (a double layer of lipids) enclosing the cytoplasm of a cell; proteins in the membrane control passage of ions (like sodium or potassium or calcium) in and out of the cell "all cells have a cell membrane"
    • ***


In literature:

The nuclear membrane then disappears and fibrillar cell-plasma or cytoplasm invades the nuclear area.
"Darwin and Modern Science" by A.C. Seward and Others
The epithelial cell membrane allows the water of the blood with certain salts in solution to pass, but rejects the albumen.
"A Practical Physiology" by Albert F. Blaisdell
By the segmentation of the fertilized egg, now invested by cell-membrane, the embryo-plant arises.
"Encyclopaedia Britannica, 11th Edition, Volume 2, Part 1, Slice 1" by Various
On the outside of the elastic membrane, just beneath the ectoderm, is a plexus or cobweb of nervous cells and fibrils.
"The Whence and the Whither of Man" by John Mason Tyler
"Valere Aude" by Louis Dechmann
The cell membrane of this class contains no pure cellulose, but a modification called fungus cellulose.
"Scientific American Supplement, No. 623, December 10, 1887" by Various
So long as the pavement-cells of our mucous membranes are healthy, they can keep them out indefinitely.
"Preventable Diseases" by Woods Hutchinson
Peripodal membrane: the cell layer surrounding the peripodal cavities.
"Explanation of Terms Used in Entomology" by John. B. Smith
The vegetable cell, on the contrary, is surrounded by a membrane of cellulose, which condemns it to immobility.
"Creative Evolution" by Henri Bergson
All strains show involution form, exhibiting vacuoles, and often show empty cell membranes.
"The Bacillus of Long Life" by Loudon Douglas

In news:

Instead, these cells retain robust PDK1 activation and membrane localization and exhibit dependency on the PDK1 substrate SGK3 SGK3 undergoes PI3K- and PDK1-dependent activation in PIK3CA mutant cancer cells.
Cell membranes capture electrical energy to amplify sound.
Proton exchange membrane (PEM) fuel cells offer chlor-alkali makers the opportunity to extract value from byproduct hydrogen without any compression or transportation costs.
Unlike most other organisms, coral eggs produce embryos that are not surrounded by a protective membrane, which makes them vulnerable to separation into component cells by even mild turbulence.
Cholesterol is a member of the sterol group of lipids, and it must be present in the membrane of every cell in the body.
ENrG Inc recently announced that it has entered into a licensing agreement with Corning Inc that enables ENrG to produce thin ceramic membranes with unique properties for solid oxide fuel cells (SOFCs).
Rab25 proteins bind integrins in the cell membrane and shuttle them to lysosomes.
Such membranes can also be found within cells, for example encapsulating the nucleus, and even surrounding many kinds of viruses.
In the meantime, the supplement SAMe has more research behind it SAMe helps to maintain cell membranes .
Robert Lefkowitz and Brian Kobilka identified the form and function of G-protein-coupled receptors , proteins located on the surface of cells, which allow the transmission of information across the cell membrane.
"This is the cell membrane, this is the cytoplasm, this is the nucleus, this is a food vacuole where food is digested, this is a waste product vacuole, these are pseudopods that move around and trap food".
Whole-cell patch clamping involves bringing a hollow glass pipette in contact with the cell membrane of a neuron Sputnik Animation and MIT McGovern Institute.
The researchers stretched Nafion, a polymer electrolyte membrane, or PEM, commonly used in fuel cells and increased the speed at which it selectively filters substances from ions and water.
After each type of milk had been "digested," they tested for levels of free fatty acids, which have been shown in adult stomachs to damage cell membranes.
Torrance based Toyota Motor Sales USA flipped the switch on their 1.1 megawatt Proton Exchange membrane fuel cell generator, the largest of its kind.

In science:

One can form with them tunable or “active” filters, simulating, as it were, the action of the cell membrane.
Amphiphilic Membranes
Figure 12: Freeze-fracture of a cell membrane from an onion root tip.
Amphiphilic Membranes
The center area shows the fracture face of the cell membrane (plasmalemma, PL).
Amphiphilic Membranes
The fluidity of biological membranes can be exhibited by fluorescence photobleaching recovery experiments in intact cells.
Amphiphilic Membranes
We are currently attempting to gain some estimate of the amount of information carried by phonons across cell membranes, but there is unfortunately very little data available on the phonon spectrum of living tissue.
Comment on Book Review of `Quantum Evolution' (Johnjoe McFadden) by Mathew J. Donald