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.
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann
References in periodicals archive ?
Chaneil cail a choltas air na nithean a tha fas gu bheil sin mar sin, a chionns g'eil dath math air barran a h-uile cail, ged a tha cuid do bharran a' bhuntata briste as deidh a' ghaoth laidir a bh'ann dihaoine agus di-sathurn' a chaidh.
Baroness Barran (Conservative), government whip, responded on behalf of the government.
Shayda Zaerpoor Le is a partner with Barran Liebman LLP.
Prof Perdita Barran, a lead author of the study, said: "We found some compounds are more present in people who have got Parkinson's, all because Joy Milne could smell a difference."
Fresh from victory over Leeds in the Academy Grand Final, four Wigan Warriors youngsters have helped to swell the Centurions ranks - Ben Kilner, Liam Byrne, Sam Grant and James Barran - while Jacques O'Neill has arrived from Castleford and St Helens have lent both Kevin Brown and Chris Follin.
"Partnering with organizations, such as ETA hand2mind, allows DonorsChoose.org to put resources in the hands of teachers across the country," said Vashti Barran, partnerships manager at DonorsChoose.org.
May's other nominees are Diana Barran, Catherine Meyer, the founder of Action Against Abduction who is married to former US ambassador Sir Christopher Meyer, and Amanda Sater, a former party deputy chair.
Surgio asi el "reformismo", es decir "la tendencia a promover el cambio mas o menos radical de los modelos economicos, sociales y mentales dominantes, sin recurrir a la violencia." (BARRAN, Benjamin NAHUM, 1985, p.13).
Lotman, "Istoki 'tolstovskogo napravleniia' v russkoi literature 1830-kh godov," in Izbrannye stat'i (Tallinn: Aleksandra, 1993), especially 50-59; and Lotman and Mints, '"Chelovek prirody' v russkoi literature XIX veka i 'Tsyganskaia tema' u Bloka." The topic was examined in greater detad by Thomas Barran; however, like other critics, Barran is more interested in the idea of social contract and fails to detect in Rousseau's treatment of the passions the spring around which Pushkin turns his tragedy.
Kunath called Perdita Barran, a professor at Manchester University and asked her to carry out research where they collected samples from Parkinson's patients and from ones without the disease.