Barrer

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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 ?
Barras and his accomplices made off in three stolen vehicles worth pounds 250,000 containing pounds 133,000 worth of Next clothes.
Martin (55) was jailed for life for murder in April last year after shooting Barras Jr, aged16, at his remote farmhouse at Emneth, Norfolk, in August 1999.
Barras envisions her book as an exercise in cross-racial interpretation.
But Barras misses the quid pro quo embedded in that relationship.
During a 29-year career with AT&T, Barras held positions in the company's real estate, construction and property management departments.
Most recently, Barras served as vice president of International Real Estate Management for Chase Manhattan' Bank.
Vaaldiam holds an option to acquire a 70% equity interest in the Duas Barras property from Mineracao Marly Ltda.
The 7,000 hectare Duas Barras property encompasses a five 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.