Barrer

(redirected from Barras)
Also found in: Dictionary, Encyclopedia, Wikipedia.

Barrer 

A unit of oxygen permeability of a contact lens material. Symbol: Dk. It is equal to the product of the diffusion coefficient D of oxygen through the material (i.e. the speed at which oxygen molecules pass through the material) and the solubility k of oxygen in the material (i.e. the number of oxygen molecules that can be absorbed in a given volume of material). See oxygen permeability; oxygen trans-missibility.
References in periodicals archive ?
2004), apoyados en la investigacion de Nandi y Toliyat (1999) existen numerosos metodos para diagnosticar el problema de las barras danadas, sin embargo indican que el mas usado y que entrega mejores resultados es el analisis de la corriente que alimenta al estator.
O metodo de mapeamento da mancha cega nao permitiu saber em que regiao da mancha cega as barras incidiam, se na regiao central ou periferica.
Harp solo year 6 and under: Alys Wynstanley, Ysgol Pen Barras.
They are Claremont Road, between Kings Road and Barras Bridge - 10.
Barras customers are passionate about their football so every pub has a big screen as well as more traditional forms of pub entertainment for other members of the family.
Barras and his accomplices made off in three stolen vehicles worth pounds 250,000 containing pounds 133,000 worth of Next clothes.
Barras envisions her book as an exercise in cross-racial interpretation.
During a 29-year career with AT&T, Barras held positions in the company's real estate, construction and property management departments.
The 7,000 hectare Duas Barras property encompasses a five kilometer portion of the Jequitinhonha River.
2004) presentaron resultados de mediciones que posibilitaron la proposicion de una nueva tecnica de aterramiento para sistemas de distribucion de energia, o sea, la utilizacion del propio poste duplo "T" como parte del aterramiento electrico, pues con el uso de las barras concretadas e de los propios postes, los resultados medidos en campo fueron excelentes.
The 7,000 hectare Duas Barras property encompasses a 5 kilometer portion of the Jequitinhonha River.
The UTM1500 is manufactured in France by Westinghouse Barras Provence, which recently completed a worldwide distribution agreement with Manipulators International.