News tagged with membrane

Related topics: cells · cell membrane

Heat-activated 'grenade' to target cancer

Researchers have developed cancer drug-packed 'grenades' armed with heat sensitive triggers, allowing for treatment to be targeted directly at tumours, according to two studies due to be presented at the National Cancer Research ...

Oct 31, 2015
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When touch turns to pain

Researchers in Tübingen and Trieste (Italy) have made a major contribution to understanding the sense of touch and pain. A team led by Dr Jing Hu (Werner Reichardt Centre for Integrative Neuroscience – CIN, Tübingen) ...

Oct 13, 2015
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What powers the pumping heart?

Researchers at the Ted Rogers Centre for Heart Research have uncovered a treasure trove of proteins, which hold answers about how our heart pumps—a phenomenon known as contractility.

Sep 25, 2015
popularity100 comments 1

Study may show the way to more effective vaccines

Scientists at the University of Bonn, together with colleagues from the USA and Japan, have shed light on an important immune mechanism. Their work shows how the body provides the important killer cells with a helper in the ...

Aug 21, 2015
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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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