ACTA ALIMENTARIA VOL. 3 (A QUARTERLY OF THE COMMITTEE ON FOOD SCIENCE OF THE HUNGARIAN ACADEMY OF SCIENCES, 1974)

1974 / 1. sz. - KOVÁCS, E.-VAS, K.: Methodological studies on the determination of respiration and ethylene production of fruits and vegetables

2 KOVÁCS & VAS: METHODOLOGY OF FRUIT RESPIRATION 1. Materials and methods 1.1. Determination of oxygen consumption by the modified Warburg method 1.1.1. Description of the apparatus. A Warburg-type manometer was used, but the traditional reaction flask was replaced by a container suitable to hold whole fruits (Fig. 1). The volume of the air space of the flask was kept at the minimum (700—750 ml) to reduce the time of measurement as far as possible. For the period of measurement the flasks were placed in a water bath, to maintain a constant temperature of air and raw material. The carbon dioxide produced by the raw material was collected by absorp­tion in 20% KOH, and oxygen consumption was determined on the basis of pressure change. Fig. 1. Modified Warburg apparatus for measurement of oxygen consumption 1* Acta Alimentaria 2,

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