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bilayer in Medical Dictionary

Lipid

...polyunsaturated fatty acids by reactive oxygen ... Conjugated dienes (CD) and lipid hydroperoxides (ROOHs) are two independent and ... lipid bilayer ( ¦ lipid ′bī′lāər ) ( cell and molecular biology ) The foundational structure of plasma membranes; it is composed of two layers ...

Erythrocyte

...ythrocyte is little more than a container ... is an immature erythrocyte . ... The erythrocyte membrane consists of two domains, the lipid bilayer and the cytoskeleton.3 ... The cytoskeleton is the other domain of the erythrocyte membrane. ... The B-cell antigen CD22 mediates monocyte a...
bilayer in Biological News

Nanotubes could help study retrovirus transmission between human cells

...cts of the cellular membrane. Giant lipid vesicles resemble micron-sized spherical soap bubbles that exist in water. They are composed of a lipid bilayer membrane only five nanometers thick. The object for experimenters was to create conditions in which the spheres would morph into cylinders of nanom...

Carnegie Mellon develops computer model to study cell membrane dynamics

...goes awry within a cell and leads to disease, Deserno said. Deserno and his team created a computer simulation of a cell membrane with a lipid bilayer a soap-like film made of 50,000 individual lipids molecules and studded it with 36 evenly spaced and contact lens-shaped disks representing remodeli...

Researchers reveal HIV peptide's possible pathway into the cell

... to uncover how the peptide interacts with a lipid bilayer that is used to model the cell membrane. A highly ...l system, the cell membrane is composed of a lipid bilayer (made up of two monolayers) designed to protect th...eventing the influx of material. Each lipid in the bilayer has a polar, or charged, end and a non-polar end. ...

Biophysical Society announces winners of 2008 Minority Travel Awards

...iciency of DNA. Danyell Wilson, University of Florida, Single Channel Analysis of a Mechanosensitive Channel Reconstituted in a Tethered Lipid bilayer Membrane Gated by an Applied Voltage. Ramallo Pardo, University of New Mexico, Mapping Nucleosome-DNA Interactions on Single Molecules of Chroma...

With record resolution and sensitivity, tool images how life organizes in a cell membrane

... the Science study, Boxer and colleagues made a spherical lipid vesicle to model a cell membrane, placed it on a small silicon wafer to make the lipid bilayer flatten into two dimensions and organized the flat membrane with a pattern of chrome grids to provide ''landmarks'' on the surface. That system let th...

Wrinkled membranes create novel drug-delivery system

...orts his findings in the Feb. 17 issue of the journal Physical Review Letters. To make the capsules, Chaieb begins by confining a drug inside lipid bilayer membranes. Some of the lipids are then "sewn together" through a polymerization process. Cooling the capsules by 10 degrees Celsius causes the capsule...

Beyond genes: Lipid helps cell wall protein fold into proper shape

...lethanolamine, or PE for short. Phospholipids, unlike their fatty acid and cholesterol cousins, include a phosphate group that spurs them to form a bilayer with water-friendly outer layers sandwiching an impermeable water-unfriendly inner layer that defines the outer surface of cells. Transport of nutrien...
bilayer in Biological Technology

Bilayer graphene gets a bandgap

...He and his colleagues have engineered a bandgap in bilayer graphene that can be precisely controlled from 0 t... the June 11 issue of Nature . Constructing a bilayer graphene transistor As with monolayer graphene...atoms are arranged in "chickenwire" configuration, bilayer graphene which consists of two graphene layers ly...

Gold-palladium nanoparticles achieve greener, smarter production of hydrogen peroxide

... aldehydes in a more environmentally friendly manner. That reaction is important to the production of spices and perfumes. In 2008, they reported that bilayer clusters of gold nanoparticles measuring about 0.5 nm in diameter were responsible for enabling the oxidation of CO to CO 2 . Their research has be...

Scientists engineer superconducting thin films

...cement and in which part of the sample the superconductivity was located. To investigate this further, they synthesized more than 200 single-phase, bilayer and trilayer films with insulating, metallic, and superconducting blocks in all possible combinations and of varying layer thickness. The films were g...

Scientists peel away the mystery behind gold's catalytic prowess

...ute of Standards and Technology (NIST) report that bilayer clusters measuring about one-half nanometer in dia... was the clue that enabled us to identify the tiny bilayer clusters as the important species in the catalytic...at the active species in the catalyst are the tiny bilayer clusters. "We believe we have obtained the firs...
bilayer in Biological Definition

Lipid bilayer

A DPPC bilayer simulation Color scheme: PO4 = green, N(CH3)3 = violet, water = blue, terminal CH3 = yellow, O = red, glycol C = brown, chain C = grey In biology and chemistry , a lipid bilayer is a membrane or zone of a membrane composed only of lipid molecules. The ...

Biological membrane

... A biological membrane or biomembrane is a membrane which acts as a barrier within or around a cell . It is a lipid bilayer , being composed of a double layer of lipid -class molecules , specifically phospholipids , with occasional proteins intertwined, some of which f...

Cell biology

... Adhesion Chloroplast Cilia Cytoplasm Cytoskeleton Endoplasmic reticulum Flagella Glycolysis Golgi apparatus Lipid bilayer Membrane Mitochondrion Nucleus Organelle Passive transport Ribosome Signal transduction Vesicle Important public...

Chloroplast

...ay take, and are generally considered to have originated as endosymbiotic cyanobacteria . In green plants chloroplasts are surrounded by two lipid bilayer membranes , now thought to correspond to the outer and inner membranes of the ancestral cyanobacterium. The genome is considerably reduced compare...

Chloroplast membrane

...their function. Like mitochondria , chlorplasts have a double-membrane envelope, called the chloroplast envelope . Each membrane is a phospholipid bilayer , between 6 and 8 nm thick, and the two are separated by a gap of 10-20nm, called the intermembrane space. The outer membrane is permiable to most ...

Endomembrane system

...teins attached to either side or traversing them. The following organelles are part of the endomembrane system: The plasma membrane is a lipid bilayer membrane that separates the cell from its environment and regulates the transport of molecules and signals into and out of the cell. The nuclear en...

Cell membrane

...brane or plasmalemma ) is a thin and structured bilayer of phospholipid and protein molecules that ...ar compartments. The foundation is a phospholipid bilayer , and the membrane as a whole is often described a...tes) or hopanoids (in case of prokaryotes) in the bilayer assist in regulating fluidity. Detailed Struc...

Glycolipid

...e cell surface membrane . The carbohydrates are found on the outer surface of all eukaryotic cell membranes. They extend from the phospholipid bilayer into the aqueous environment outside the cell where it acts as a recognition site for specific chemicals as well as helping to maintain the stability ...

Ion channel

...nvolve a circular arrangement of identical or related proteins closely packed around a water-filled pore through the plane of the membrane or lipid bilayer . While large-pore channels permit the passage of ions more or less indiscriminately, the archetypal channel pore is just one or two atoms wide at its...

Lipid

...e nonpolar tails of lipids ( U ) tend to cluster together, forming a lipid bilayer (1) or a micelle (2). The polar heads ( P ) face the aqueous environment...em together. Figure 2: Self-organization of lipids. A lipid bilayer is shown on the left and a micelle on the right. The self-organisat...
bilayer in Biological Dictionary

Phospholipid bilayer

A lipid bilayer is a thin membrane made of two layers of lipid molecules. These membranes are flat sheets that form a continuous barrier around cells. The cell membrane of almost all living organisms and many viruses is made... ... allow phospholipids to play an important role in th...

Virion

... Next to the common cold, influenza (the flu) is perhaps the most familiar ... The influenza virion is an enveloped virus that derives its lipid bilayer from ... ... virus particles, also called virions , contain genetic material, or ... virion ... Virion definition - Medical Dictionary defin...

Plasma membrane

...tribution. ... Plasma membranes also contain protein and glycoprotein in addition to lipid, of ... The plasma membrane is composed of a bilayer of phospholipid molecules, plus ... A cell membrane (also known as a plasma membrane ) is a thin semifluid structure that separates the co...

Phospholipid

... ... phospholipids , ... Individual phospholipid molecules are able to move freely in the ... The arrangement of phospholipid molecules into a bilayer in an ... Supplies GMP grade phospholipids for worldwide drug manufacturers and develops new types of phospholipids and liposome formulations. ...

Nuclear membrane

... The nuclear envelope (NE) is a double lipid bilayer that encloses the genetic material in eukaryotic cells. The nuclear envelope also serves as the physical barrier, separating the contents of the ...

Nuclear lamina

...oviding mechanical support, the nuclear lamina regulates important cellular events such as DNA... The nuclear envelope (NE) is a double lipid bilayer that encloses the genetic material in eukaryotic cells. The nuclear envelope also serves as the physical barrier, separating the contents of the ...

Liposomes

...re lipid bubbles and are the foundation of Liposomal ... Liposomes ... Liposomes are different from micelles structurally in that they have a bilayer ... Nano- liposomes and ... Investigating the uptake and intracellular fate of pH-sensitive liposomes by ... Gadolinium-loaded liposomes allow...

Lipids

... provides up-to-date resources for researchers, faculty, and clinicians in atherosclerosis and other lipid ... The packing of lipids within the bilayer also affects its mechanical properties, ... Lipids self-assemble into this structure because of the hydrophobic effect, ... The most abundant li...

Lipid

...ructures of some common lipids . ... Other major lipid classes in the fatty acid category are the fatty esters and fatty amides. ... A lipid bilayer is a thin membrane made of two layers of lipid molecules. These membranes are flat sheets that form a continuous barrier around cells. The cell ...

Fluid mosaic model

...e fluid mosaic model of the structure of cell membranes" ... The fluid mosaic model of a biological membrane defines a phospholipid bilayer ... Fig. Fluid mosaic membrane model of the outer and inner membranes of a bacterial ... mosaic properties of cell membranes. A mosaic...
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