Researchers have shown that a recently identified protein, called Speedy A, plays an essential role in the early stages of meiosis—a special type of cell division that produces sperm and egg cells.
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Researchers studying the root cause of cystic fibrosis have made a major advance in our understanding of silent gene changes with implications for the complexity of cystic fibrosis. The findings are published today in [16 ...
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Researchers find key molecule that could lead to new therapies for anemia and other iron disorders
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Though cancer treatments have advanced somewhat in our time, the methods still commonly used on patients are very harsh. These include invasive surgeries and chemotherapy.
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Cornell University researchers have produced for the first time an image of P2X7, a receptor associated with chronic pain. Visualizing the shape of the receptor has also allowed them to make a second groundbreaking discovery: ...
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A research team led by St. Jude Children's Research Hospital immunologists has discovered how a set of proteins delays the "executioner" machinery that kills damaged or infected cells in a process called necroptosis. The ...
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The molecular causes of diseases such as Parkinson's need to be understood as a first step towards combating them. University of Konstanz chemists working alongside Professor Malte Drescher recently succeeded in analysing ...
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Thin parts of the cell membranes of neurons turn out to be particularly vulnerable to a protein that collects in the brain of people with Alzheimer's disease, according to a University of Michigan researcher.
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Researchers from UCLA and the University of Western Australia have developed a new way of visualizing the distribution of cholesterol in cells and tissues. Their research provides insights into the movement of cholesterol ...
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A study led by researchers at the Hospital del Mar Medical Research Institute (IMIM) and the Faculty of Medicine in Charité Hospital, Berlin demonstrates that the cholesterol present in cell membranes can interfere with ...
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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.
This text uses material from Wikipedia, licensed under CC BY-SA
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