- Bjerrum length
The Bjerrum length is the separation at which the
electrostaticinteraction between two
elementary charges is comparable in magnitude to the thermal energy scale,, where is the
Boltzmann constantand is theabsolute temperature in Kelvin. It could be seen as one screening effect about the electrostatic interaction in a certain media [ [http://www.uic.edu/classes/phys/phys450/MARKO/N005.html Screening of Electrostatic Interactions ] ] .
In standard units, the Bjerrum length is given by
where is the
elementary charge, is the relative dielectric constantof the mediumand is the vacuum permittivity.For water atroom temperature ( K), , so that nm.
Gaussian units, and the Bjerrum length has the simpler form
Wikimedia Foundation. 2010.
Look at other dictionaries:
Niels Bjerrum — Niels Janniksen Bjerrum, born March 11, 1879 in Copenhagen, died September 30, 1958, was a Danish chemist. Niels Bjerrum was the son of opthamologist Jannik Petersen Bjerrum, and started to study at University of Copenhagen in 1897. He… … Wikipedia
Debye length — In plasma physics, the Debye length (also called Debye radius), named after the Dutch physicist and physical chemist Peter Debye, is the scale over which mobile charge carriers (e.g. electrons) screen out electric fields in plasmas and other… … Wikipedia
Debye–Hückel theory — The Debye–Hückel theory was proposed by Peter Debye and Erich Hückel as a theoretical explanation for departures from ideality in solutions of electrolytes. It was based on an extremely simplified model of the electrolyte solution but… … Wikipedia
DLVO theory — The DLVO theory is named after Derjaguin and Landau, Verwey and Overbeek. The theory describes the force between charged surfaces interacting through a liquid medium. It combines the effects of the van der Waals attraction and the electrostatic… … Wikipedia
Counterion condensation — The counterion condensation phenomenon is commonly described by Manning’s theory (Manning 1969), which assumes that counterions can condense onto the polyions until the charged density between neighboring monomer charges along the polyion chain… … Wikipedia
Longitud de Debye — En Física de plasmas la longitud de Debye, también llamada radio de Debye es la escala a través de la cual portadores de carga móviles por ejemplo, electrones generan un apantallamiento de los campos eléctricos en los plasmas y otros conductores … Wikipedia Español
Rituximab — drugbox mab source = chimeric (mouse/human) target = CD20 CAS number = 174722 31 7 | ATC prefix = L01 | ATC suffix = XC02 | ATC supplemental = | PubChem = | DrugBank = BTD00014 | C=6416 | H=9874 | N=1688 | O=1987 | S=44 | molecular weight =… … Wikipedia