3.2 carbon dioxide and ethylene production
High pressure processing had a large effect on the co2 and ethylene production the avocado slices, but duration of treatment did not generally have as much effect as that of pressure. When measured 1 h after HPP treatment, 200 and 300 MPa treatments had no effect on co2 production, but 400-600 MPa treatments resulted in = 50% reduction compared with the control (fig.3a.). this result is different from that found in mume frui, where a 200-MPa treatment reduced respiration rate to ¼ of the untreated (Baba et al., 1999), but the authors did not examine higher pressures. For carrot sticks, the only HPP pressure examined ( 600 MPa) reduced respiration rate to =1/10th of the control when applied for 2 min,and a further 2-fold reduction after a 10-min treatment ( Eggleston&Tanner, 2005). Thus, the reduction in respiration rate observed in carrot sticks and mume fruit were generally greater than for the avocado tissue examined here.
3.2 carbon dioxide and ethylene production
High pressure processing had a large effect on the co2 and ethylene production the avocado slices, but duration of treatment did not generally have as much effect as that of pressure. When measured 1 h after HPP treatment, 200 and 300 MPa treatments had no effect on co2 production, but 400-600 MPa treatments resulted in = 50% reduction compared with the control (fig.3a.). this result is different from that found in mume frui, where a 200-MPa treatment reduced respiration rate to ¼ of the untreated (Baba et al., 1999), but the authors did not examine higher pressures. For carrot sticks, the only HPP pressure examined ( 600 MPa) reduced respiration rate to =1/10th of the control when applied for 2 min,and a further 2-fold reduction after a 10-min treatment ( Eggleston&Tanner, 2005). Thus, the reduction in respiration rate observed in carrot sticks and mume fruit were generally greater than for the avocado tissue examined here.
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