Enzyme kinetics modelling approach to evaluate the impact of high CO2 and super-atmospheric O2 concentrations on respiration rate of pomegranate arils

被引：12
作者：
Belay, Zinash A. [1 ]
Caleb, Oluwafemi J. [2 ]
Opara, Umezuruike Linus [1 ,3 ]
机构：
[1] Stellenbosch Univ, South African Res Chair Postharvest Technol, Postharvest Technol Res Lab, Dept Food Sci,Fac AgriSci, Private Bag X1, ZA-7602 Stellenbosch, South Africa
[2] Agr Res Council Infruitec Nietvoorbij, Postharvest & Wine Technol, Stellenbosch, South Africa
[3] Stellenbosch Univ, South African Res Chair Postharvest Technol, Postharvest Technol Res Lab, Dept Hort Sci,Fac AgriSci, Stellenbosch, South Africa
来源：
CYTA-JOURNAL OF FOOD | 2017年 / 15卷 / 04期
基金：
新加坡国家研究基金会;
关键词：
Modified atmosphere; gas flushing; postharvest physiology; Michaelis-Menten; Punica granatum L; OXYGEN CONCENTRATION; FRESH FRUITS; SHELF-LIFE; TEMPERATURE; QUALITY; PACKAGES; STORAGE; VEGETABLES; PRODUCE; PEAR;
D O I：
10.1080/19476337.2017.1324524
中图分类号：
TS2 [食品工业];
学科分类号：
0832 ;
摘要：
Super-atmospheric O-2 has been shown to affect respiration rate (RR), but no model describing its effect on RR for pomegranate arils has been reported. This study investigated the effects of four different gas compositions (5kPa O-2, 10kPa CO2 and 85kPa N-2; 10kPa O-2, 5kPa CO2 and 85kPa N-2; 70kPa O-2, 10kPa CO2 and 20kPa N-2; and air) on RR of pomegranate arils (cv. Wonderful) stored at 5 degrees C. Michaelis-Menten enzyme kinetics models were used to investigate the effect of CO2 inhibition on O-2 consumption rate. Respiratory quotient was used to determine fermentation threshold. The O-2 consumption rate increased from 0.87 to 2.81mL/kg h, with increase in O-2 concentration from 5kPa to 70kPa. All enzyme kinetics model parameters adequately described the influence of gas concentration on aril RR with correlation coefficient (R-adj(2)=81-91%).
引用
收藏
页码：608 / 616
页数：9
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