News tagged with membrane
Aggressive forms of bladder cancer involve the protein PODXL – a discovery that could hold the key to improved treatment, according to researchers at Lund University, Uppsala University and KTH in Sweden.
Cancer May 23, 2013 | 5 / 5 (2) | 0
Bacteria resistant to the antibiotic colistin are also commonly resistant to antimicrobial substances made by the human body, according to a study in mBio, the online open-access journal of the American Society for Microb ...
Diseases, Conditions, Syndromes May 21, 2013 | 4.5 / 5 (2) | 0
(Medical Xpress)—Investigation by researchers from the University of Exeter and ETH Zurich has shed new light on a protein which is linked to a common neurological disorder called Charcot-Marie-Tooth disease.
Neuroscience May 16, 2013 | not rated yet | 0 |
Scientists from Flinders University are trying to develop a new treatment for a highly aggressive, asbestos-related lung cancer that is set to become more prevalent in the future.
Cancer May 16, 2013 | 5 / 5 (1) | 0
Exit discovered in cellular garbage truck: Immersed in the inner workings of a highly selective refuse collection
At the University of Geneva (UNIGE), the team led by Professor Jean Gruenberg has long been interested in the movement of lysosomes, the sub-compartments of cells to where endocytic vesicles deliver their waste content and ...
Medical research May 09, 2013 | 5 / 5 (1) | 0
Stumped for years by a natural filter in the body that allows few substances, including life-saving drugs, to enter the brain through the bloodstream, physicians who treat neurological diseases may soon have a new pathway ...
Medical research May 06, 2013 | 5 / 5 (1) | 0
Stem cells drawn from amniotic fluid show promise for tissue engineering, but it's important to know what they can and cannot do. A new study by researchers at Rice University and Texas Children's Hospital ...
Medical research May 02, 2013 | 5 / 5 (2) | 0 |
National Institutes of Health researchers used the popular anti-wrinkle agent Botox to discover a new and important role for a group of molecules that nerve cells use to quickly send messages. This novel ...
Medical research May 02, 2013 | 5 / 5 (1) | 0 |
A properly functioning immune system is a lesson in balance, providing protection against disease without attacking healthy tissue. Work led by St. Jude Children's Research Hospital scientists and published recently in Nature Im ...
Immunology Apr 30, 2013 | 5 / 5 (3) | 0 |
(Medical Xpress)—The blood-brain barrier (BBB) prevents most large or hydrophilic (polar) molecules from getting into the brain. For many neurological diseases, like Parkinson's, the presence of the BBB ...
Medical research Apr 30, 2013 | 5 / 5 (2) | 0 |
The food dye Brilliant Blue FCF (BB FCF) could be a useful tool in the development of treatments for a variety of conditions involving the membrane channel protein Pannexin 1(Panx1), according to a study in The Journal of General Physi ...
Medical research Apr 29, 2013 | not rated yet | 0
When you have your cholesterol checked, the doctor typically gives you levels of three fats found in the blood: LDL, HDL and triglycerides. But did you know your body contains thousands of other types of fats, or lipids?
Medical research Apr 29, 2013 | 4.7 / 5 (3) | 0
(Medical Xpress)—Membrane fusion is a highly regulated event, both inside cells, and between them. From the moment a sperm first fuses with an egg, subsequent developmental events depend upon its proper ...
Medical research Apr 26, 2013 | 4.3 / 5 (3) | 0 |
A new minimally invasive tumor ablation technique is providing hope for liver cancer patients who can't undergo surgery or thermal ablation, a study shows.
Cancer Apr 18, 2013 | not rated yet | 0
The human body has the ability to ward off viruses by activating a naturally occurring protein at the cellular level, setting off a chain reaction that disrupts the levels of cholesterol required in cell membranes to enable ...
Medical research Apr 17, 2013 | 5 / 5 (6) | 2 |
A membrane is a layer of material which serves as a selective barrier between two phases and remains impermeable to specific particles, molecules, or substances when exposed to the action of a driving force. Some components are allowed passage by the membrane into a permeate stream, whereas others are retained by it and accumulate in the retentate stream.
Membranes can be of various thickness, with homogeneous or heterogeneous structure. Membrane can also be classified according to their pore diameter. According to IUPAC, there are three different types of pore size classifications: microporous (dp < 2nm), mesoporous (2nm < dp < 50nm) and macroporous (dp > 50nm). Membranes can be neutral or charged, and particles transport can be active or passive. The latter can be facilitated by pressure, concentration, chemical or electrical gradients of the membrane process. Membranes can be generally classified into three groups: inorganic, polymeric or biological membranes. These three types of membranes differ significantly in their structure and functionality.
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