2004
DOI: 10.1016/j.postharvbio.2004.02.010
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Improving heating uniformity of fresh fruit in radio frequency treatments for pest control

Abstract: Non-uniform heating of fresh fruit caused by variations in radio frequency (RF) fields is a major obstacle in developing postharvest insect control treatments based on RF energy. A fruit mover was developed to evaluate possibilities to improve RF heating uniformity of large fruit, such as oranges and apples, in a 12 kW batch type RF system. This fruit mover provided a means to rotate and move fruit in water when subjected to RF heating. Parameters for moving and rotating fruit in the mover were selected based … Show more

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Cited by 116 publications
(55 citation statements)
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References 22 publications
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“…The core temperature of centrally placed fruit was recorded and logged during the RF heating experiment using a fiber optic sensor (UMI�8, FISO Technology, Quebec, Can� ada). In additional experiments, five model fruits were RF heated in a fruit mover developed by Birla et al (2004) to study the effect of rotation and movement of fruits during RF heating. The fruit mover had twelve numbers of water spray nozzles mounted on the periph� ery of a square container to rotate fruits on their axes and in a circular path.…”
Section: Experimental Procedures For Validationmentioning
confidence: 99%
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“…The core temperature of centrally placed fruit was recorded and logged during the RF heating experiment using a fiber optic sensor (UMI�8, FISO Technology, Quebec, Can� ada). In additional experiments, five model fruits were RF heated in a fruit mover developed by Birla et al (2004) to study the effect of rotation and movement of fruits during RF heating. The fruit mover had twelve numbers of water spray nozzles mounted on the periph� ery of a square container to rotate fruits on their axes and in a circular path.…”
Section: Experimental Procedures For Validationmentioning
confidence: 99%
“…The fruit mover had twelve numbers of water spray nozzles mounted on the periph� ery of a square container to rotate fruits on their axes and in a circular path. Details of the fruit mover can be found in our earlier publication (Birla et al, 2004). The RF heated model fruit was immediately bisected ver� tically and a thermal image was recorded with the (Stogryn, 1971) v (von Hippel, 1995, p. 327) infrared camera for one of the cut surfaces within 10 s to avoid the surface cooling.…”
Section: Experimental Procedures For Validationmentioning
confidence: 99%
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“…When fresh fruits are heated by RF energy in air, fruits may suffer thermal damage (burn) at the points of contact with the container or with other fruit because the contact points form the route of least resistance for RF energy to pass (Ikediala et al, 2002;Birla et al, 2004). A water immersion technique was used to avoid non-uniform RF heating in fresh fruits (Ikediala et al, 2002;Birla et al, 2004).…”
mentioning
confidence: 99%
“…Studies conducted by Gazit, Rossler, Wang, Tang, and Lurie (2004) recorded the z values for Mediterranean fruit fly (Diptera: Tephritidae; Ceratitis capitata, Weidemann) eggs and 3rd instar larvae of 4.1 and 3.6°C, respectively. Given the similarity between the Mediterranean fruit fly and the B. tryoni (Birla et al, 2004;Ekman & Pristijono, 2010) a z value of 4°C was selected to represent both eggs and larvae for this study.…”
Section: Measurement Of Temperature Inside Apples and Mortality Time mentioning
confidence: 99%