The source concentration was measured by gas chromatography using a gas density balance (Aerograph
Model 90-P; Varian, Mount Waverley, Victoria, Australia).
O software utilizado para aquisicao dos dados foi o Aerograph
. Os testes foram considerados validos quando dois dos criterios citados a seguir foram alcancados: atingir a FCmax estimada pela idade (220 - idade), obter um valor de taxa de troca respiratoria (RER) maior que 1,15 ou apresentar taxa respiratoria maxima maior do que 35 respiracoes por minuto (Howley, Bassett Jr.
4.3 Software (AeroSport Inc., Ann Arbor, MI, USA) was used to record and analyze the data collected from the V[O.sub.2]000.
Planimetria de la villa romana de Los Villaricos (Aerograph
Two gas diffusion electrodes (referred to as GDE1 and GDE2) were obtained by spraying the ink onto the substrate; an aerograph
with nitrogen as gas carrier was employed, and a Pt loading of 0.5 mg/[cm.sup.2] and 0.4 mg/[cm.sup.2] for GDE1 and GDE2, respectively, was obtained.
A Varian Aerograph
1400 series chromatographer was used with a 1/8" diameter by 1.5 m long column, an OV-101 packing at 1.5% with 0.5 ml of sample dissolved in chloroform and programmed temperature range 140[degrees]C to 270[degrees]C with increments of 6[degrees]/minute (McNair and Bonalli 1969).