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Efflux
Efflux may refer to: * Efflux (microbiology), a mechanism responsible for moving compounds out of cells * e-flux, a publishing platform and archive See also * Efflux time, part of a measure of paint viscosity * Flux (biology) In general, flux in biology relates to movement of a substance between compartments. There are several cases where the concept of flux is important. * The movement of molecules across a membrane: in this case, flux is defined by the rate of diffusi ..., movement of a substance between compartments * Influx (other) * {{Disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Efflux (microbiology)
In microbiology, efflux is the moving of a variety of different compounds out of cells, such as antibiotics, heavy metals, organic pollutants, plant-produced compounds, quorum sensing signals, bacterial metabolites and neurotransmitters. All microorganisms, with a few exceptions, have highly conserved DNA sequences in their genome that are transcribed and translated to efflux pumps. Efflux pumps actively move substances out of a microorganism, in a process known as active efflux, which is a vital part of xenobiotic metabolism. This active efflux mechanism is responsible for various types of resistance to bacterial pathogens within bacterial species - the most concerning being antibiotic resistance because microorganisms can have adapted efflux pumps to divert toxins out of the cytoplasm and into extracellular media. Efflux systems function via an energy-dependent mechanism (active transport) to pump out unwanted toxic substances through specific efflux pumps. Some efflux systems ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Efflux Time
A Zahn cup is a viscosity measurement device widely used in the paint industry. It is commonly a stainless steel cup with a tiny hole drilled in the centre of the bottom of the cup. There is also a long handle attached to the sides. There are five cup specifications, labelled Zahn cup #x, where x is the number from one through five (see table below). Large number cup sizes are used when viscosity is high, while low number cup sizes are used when viscosity is low. They are manufactured in accordance to ASTM D 4212, ASTM D1084 and ASTM D816 To determine the viscosity of a liquid, the cup is dipped and completely filled with the substance. After lifting the cup out of the substance the user measures the time until the liquid streaming out of it breaks up, this is the corresponding "efflux time". On paint standard specifications, one denotes viscosity in this manner: ''efflux time'', ''Zahn cup number''. Conversion One can convert efflux time to kinematic viscosity by using an eq ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
E-flux
e-flux is a publishing platform and archive, artist project, curatorial platform, and e-mail service founded in 1998. The arts news digests, events, exhibitions, schools, journal, books, and art projects produced and/or disseminated by e-flux describe strains of critical discourse surrounding contemporary art, culture, and theory internationally. Its monthly publication, ''e-flux journal'', has produced essays commissioned since 2008 about cultural, political, and structural paradigms that inform contemporary artistic production. History In November 1998, curators Regine Basha and Christoph Gerozisses, along with artist Anton Vidokle organized the group exhibition ''The Best Surprise is No Surprise'' at the Holiday Inn in Chinatown, Manhattan. Basha, Gerozisses, and Vidokle used e-mail, then a new communication technology, to disseminate the press release for the 12-hour, all-night exhibition. The exhibition featured works by Tomoko Takahashi, Michel Auder, and Carsten Nicola ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flux (biology)
In general, flux in biology relates to movement of a substance between compartments. There are several cases where the concept of flux is important. * The movement of molecules across a membrane: in this case, flux is defined by the rate of diffusion or transport of a substance across a permeable membrane. Except in the case of active transport, net flux is directly proportional to the concentration difference across the membrane, the surface area of the membrane, and the membrane permeability constant. * In ecology, flux is often considered at the ecosystem level – for instance, accurate determination of carbon fluxes using techniques like eddy covariance (at a regional and global level) is essential for modeling the causes and consequences of global warming. * Metabolic flux refers to the rate of flow of metabolites through a biochemical network, along a linear metabolic pathway, or through a single enzyme. A calculation may also be made of carbon flux or flux of other elemen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
