Model for Gas Exchange Dynamics in Modified‐Atmosphere Packages of Fruits and Vegetables

Fishman, Svetlana; Rodov, Victor; Peretz, J.; Ben-Yehoshua, S.

doi:10.1111/j.1365-2621.1995.tb06296.x

Cited by 50 publications

(23 citation statements)

References 23 publications

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“…Many scientists have analyzed the respiratory behaviour of various fruits and vegetables at varying conditions of storage temperature and humidity Fishman et al 1995;Jacxsens et al 2000;Geysen et al 2005). Accounting for all the factors that affect respiration is rather complex.…”

Section: Introductionmentioning

confidence: 99%

Respiratory dynamics of fresh baby corn (Zea mays L.) under modified atmospheres based on enzyme kinetics

2012

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The respiratory behaviour of baby corn -whole and end-cut, under different temperatures and gas conditions was evaluated to study its respiratory dynamics based upon enzyme kinetics. The dependence of respiration rate on the O 2 and CO 2 concentrations has been described assuming the enzyme kinetics model for combined type of inhibition caused by CO 2 . Various respiratory parameters viz. maximal O 2 consumption rate Michaelis-Menten constants, Inhibition constants under the specified environmental conditions of 5, 12.5, 20°C and 75% relative humidity (RH) were estimated using non-linear regression technique. The enzyme kinetics parameters were analyzed according to Arrhenius law to study their temperature dependence. Based upon the overall analysis, it was found that storage temperature had substantial affect on the partial pressures within the closed containers and subsequently the respiration rates. The concentration of O 2 inside the container and surrounding temperature had synergistic effect on the rate of respiration and respiratory parameters. Though the inhibition by evolved CO 2 was observed to be of combined type, it changed from predominantly competitive at 5°C to predominantly uncompetitive at 12.5 and 20°C. This study can be utilized for design of modified atmosphere packages for storage of fresh and minimally processed baby corn.

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Section: Introductionmentioning

confidence: 99%

Respiratory dynamics of fresh baby corn (Zea mays L.) under modified atmospheres based on enzyme kinetics

2012

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“…The importance of such a process has been put forward by postharvest scientists studying the effect of film permeability of packaging on gas concentrations (Fishman et al, 1995). This is all the more important as permeability and skin area are highly variable between species and within the same species (Cameron and Reid, 1982).…”

Section: Discussionmentioning

confidence: 99%

ETHY. A Theory of Fruit Climacteric Ethylene Emission

Génard

Gouble

2005

Plant Physiology

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A theory of fruit climacteric ethylene emission was developed and used as the basis of a simulation model called ETHY. According to the theory, the biosynthetic pathway of ethylene is supplied by ATP and is regulated by 1-aminocyclopropane-1-carboxylic acid (ACC) synthase and ACC oxidase. The conjugation of ACC with malonate to form MACC was taken into account as a way to decrease the availability of ACC. Because of the seasonal increase of fruit volume, the dilution of biochemical compounds used in ETHY was taken into account. Finally, the ethylene diffusion across the skin was considered. The theory took into account the effect of temperature and O 2 and CO 2 internal concentrations on ethylene. The model was applied to peach (Prunus persica) fruit over 3 years, several leaf:fruit ratios, and irrigation conditions. An adequate ethylene increase was predicted without considering any increase in respiration during the ripening period, which suggests that the respiratory climacteric may not be required for ripening. Another important result of this study is the high sensitivity of ETHY to the parameters involved in the calculation of ACC oxidase and ACC synthase activities, ATP production, and skin surface and permeability. ETHY was also highly sensitive to changes in fruit growth and temperature.The plant hormone ethylene (C 2 H 4 ) plays a major role in the ripening process of climacteric fruits. Ripening parameters such as flesh softening (Haji et al., 2003;Hiwasa et al., 2003), color change (Flores et al., 2001), and production of aromas depend strongly on C 2 H 4 production (Rupasinghe et al., 2000;Alexander and Grierson, 2002;Flores et al., 2002).C 2 H 4 production in plant tissues has been studied extensively (Arshad and Frankenberger, 2002). It proceeds via a biosynthetic pathway, which was first established in apple (Malus domestica) fruit by Adams and Yang (1977). This pathway proceeds from Met, through S-adenosylmethionine (SAM) and 1-aminocyclopropane-1-carboxylic acid (ACC) to C 2 H 4 . The pathway enables high rates of C 2 H 4 production without high intracellular concentrations of Met. This is achieved by recycling 5#-methylthioadenosine (MTA) to Met through the Yang cycle. The respiration produces the ATP needed for the Yang cycle. Thanks to this recycling process, high levels of C 2 H 4 can be produced with a constant pool of Met (Arshad and Frankenberger, 2002). It is known that C 2 H 4 production rates in ripening fruit are controlled by the tissue's capability to synthesize ACC and to convert ACC to C 2 H 4 . The two key controls are ACC synthase (ACCs) and ACC oxidase (ACCo; Tucker, 1993). The C 2 H 4 is diluted in fruit tissue and then diffused into the atmosphere. Thus, fruit volume and permeability of skin to gas are important biophysical traits of fruit to consider when analyzing C 2 H 4 emission (Ben-Yehoshua and Cameron, 1989).The aim of this work was to develop a theory of C 2 H 4 emission, based on a mathematical representation of the respiration process and C 2 H 4 pathway. This repr...

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“…1,3,6 In a MAP system, the gas exchange is related to several factors, such as food product type, freshness, microbial load, lipid content, package permeability, temperature and storage time. 7 There are several studies which approach the gas transfer in MAP systems, mathematical models 8,9,10,11 and experimental work. 12 In addition, software developed by Dalgaard 13 allows for the prediction of shelf-life in several seafood products under MAP conditions.…”

Section: Introductionmentioning

confidence: 99%

Modelling a modified atmosphere packaging system for fresh scallops (Argopecten purpuratus)

2006

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Seafood is a highly perishable food, which has a relative short shelf-life. Modified atmosphere packaging (MAP) is a system that offers a way of extending the shelflife of seafood products, maintaining quality and inhibiting bacterial growth. The objective of this research was to study and determine the optimal conditions for packaging scallops in a modified atmosphere system, which includes CO 2 /O 2 /N 2 mixture, headspace : food ratio and storage temperature, utilizing an integrated mathematical model for MAP systems with its respective experimental validation. For validation purposes, two experiments were conducted, using gas mixtures of: (a) 45% CO 2 /10% O 2 /45% N 2 ; and (b) 60% CO 2 /10% O 2 /30% N 2 . In addition, two experiments, at 6°C and 20°C, were conducted to obtain the shelf-life model, utilizing the following gas mixtures: 30% CO 2 /10% O 2 /60% N 2 ; 45% CO 2 /10% O 2 /45% N 2 ; 60% CO 2 /10% O 2 /30% N 2 ; and 75% CO 2 /10% O 2 /15% N 2 . Gas mixtures with CO 2 concentrations between 30% and 70% and different headspace : food ratios were tested during simulations. The optimal conditions for scallop storage were a 60% CO 2 /10% O 2 /30% N 2 gas mixture and a headspace : food ratio of 2 : 1. With these conditions, a simulated shelf-life of 21 days was obtained. Optimal conditions consider maximum shelf-life, an adequate film collapse criterion, and time to reach the pseudo-equilibrium condition. The predictive mathematical model, coupled with experimental studies for specific products, can be efficiently utilized to evaluate packaging alternatives (size, material and selected thickness) for different temperatures and initial gas concentration scenarios of MAP products.

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Model for Gas Exchange Dynamics in Modified‐Atmosphere Packages of Fruits and Vegetables

Cited by 50 publications

References 23 publications

Respiratory dynamics of fresh baby corn (Zea mays L.) under modified atmospheres based on enzyme kinetics

Respiratory dynamics of fresh baby corn (Zea mays L.) under modified atmospheres based on enzyme kinetics

ETHY. A Theory of Fruit Climacteric Ethylene Emission

Modelling a modified atmosphere packaging system for fresh scallops (Argopecten purpuratus)

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