Thermophoresis

Thermophoresis

Thermophoresis, also called thermodiffusion or Soret effect [cite journal | author= Stefan Duhr, and Dieter Braun | title= Why molecules move along a temperature gradient | journal= PNAS | year= 2006 | volume= 103 | pages= 19678–19682 | doi= 10.1073/pnas.0603873103 | pmid= 17164337 [http://www.pnas.org/cgi/content/short/103/52/19678] ] , is the effect of a temperature gradient on multicomponent (or isotopic) mixtures of particles. Thermal diffusion is regarded as "positive" when molecules move from a hot to cold region and "negative" when the reverse is true. Typically the heavier/larger species in a mixture exhibits positive thermophoretic behavior while the lighter/smaller species exhibit negative behavior.

This effect is relevant to planetary differentiation and is exploited in the manufacturing of optical fiber and uranium enrichment. It can be important as a transport mechanism in fouling of heat exchangers.

References


Wikimedia Foundation. 2010.

Игры ⚽ Нужно сделать НИР?

Look at other dictionaries:

  • thermophoresis —  Thermophoresis  Термофорез   Движение частиц в поле температурного градиента. Осаждение частиц на твердых поверхностях в результате термофореза называется термопреципитацией. При этом движение частиц происходит всегда вдоль градиента температуры …   Толковый англо-русский словарь по нанотехнологии. - М.

  • thermophoresis — noun The movement of molecules in a temperature gradient …   Wiktionary

  • Microscale thermophoresis — (MST) is a technology for the analysis of biomolecules. Microscale Thermophoresis is the directed movement of particles in a microscopic temperature gradient. Any change of the hydration shell of biomolecules due to changes in their… …   Wikipedia

  • термофорез —  Thermophoresis  Термофорез   Движение частиц в поле температурного градиента. Осаждение частиц на твердых поверхностях в результате термофореза называется термопреципитацией. При этом движение частиц происходит всегда вдоль градиента температуры …   Толковый англо-русский словарь по нанотехнологии. - М.

  • Enzyme assay — Beckman DU640 UV/Vis spectrophotometer. Enzyme assays are laboratory methods for measuring enzymatic activity. They are vital for the study of enzyme kinetics and enzyme inhibition. Contents …   Wikipedia

  • Thermophorese — Als Thermophorese, Thermodiffusion oder Ludwig Soret Effekt wird in den Naturwissenschaften die Bewegung von Teilchen aufgrund eines Temperaturgradienten innerhalb eines Fluids bezeichnet. Benannt ist der Effekt nach dem deutschen Physiologen… …   Deutsch Wikipedia

  • Methods to investigate protein–protein interactions — There are many methods to investigate protein–protein interactions. Each of the approaches has its own strengths and weaknesses, especially with regard to the sensitivity and specificity of the method. A high sensitivity means that many of the… …   Wikipedia

  • Ligand (biochemistry) — Myoglobin (blue) with its ligand heme (orange) bound. Based on PDB 1MBO For other uses of Ligand , see Ligand (disambiguation). In biochemistry and pharmacology, a ligand (from the …   Wikipedia

  • DNA binding site — DNA binding sites are a type of binding site found in DNA where other molecules may bind. DNA binding sites are distinct from other binding sites in that (1) they are part of a DNA sequence (e.g. a genome) and (2) they are bound by DNA binding… …   Wikipedia

  • Gel electrophoresis — apparatus – An agarose gel is placed in this buffer filled box and electrical field is applied via the power supply to the rear. The negative terminal is at the far end (black wire), so DNA migrates toward the camera. Classification… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”