Estimation of apple fruit surface area

Clayton, Murray K.; Amos, N.; Banks, Nigel H.; Morton, R. Hugh

doi:10.1080/01140671.1995.9513908

Cited by 57 publications

(41 citation statements)

References 7 publications

(9 reference statements)

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“…Average Ap H i O was estimated using wet and dry bulb temperatures of the air and fruit surface temperature using standard psychrometric equations (Campbell 1977). Fruit surface area was estimated from weight using a regression equation (Clayton et al 1995).…”

Section: Methodsmentioning

confidence: 99%

Approaches to optimising surface coatings for fruits

Banks

Cutting

Nicholson

1997

New Zealand Journal of Crop and Horticultural Science

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A mathematical model predicted that final water vapour permeance in surface-coated fruits would depend upon water permeance of the coating but not the proportion of pores blocked on the fruit surface. In contrast, predicted final oxygen (O 2 ) permeance depended upon numbers of pores blocked but not O 2 permeance of the coating. Predicted variation in internal atmosphere composition caused by coatings that blocked different proportions of pores on the model fruit surface was consistent with data from two experiments on coated apples (Malus domestica Borkh.). A new equation was developed to characterise the relationship between internal carbon dioxide (CO 2 ) and O 2 levels resulting from different coating treatments. Two graphical approaches to assess surface coatings for fresh fruits are presented. In the first, a plot of water vapour permeance against internal O 2 was used to identify the most suitable of three surface coatings for reducing water loss in 'Royal Gala' apples at 20°C. The second method used a plot of internal CO 2 versus internal O 2 in coated fruit to identify the crop's internal lower O 2 limit (LOL i ), which lies just below the optimum internal O 2 level for modified atmosphere effects. Coatings containing different concentrations of carboxymethyl cellulose produced internal O 2 levels ranging from almost H96074

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Section: Methodsmentioning

confidence: 99%

Approaches to optimising surface coatings for fruits

Banks

Cutting

Nicholson

1997

New Zealand Journal of Crop and Horticultural Science

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“…Eq. (8) (estimated according to Clayton et al, 1995) and storage under air at 0.5°C and 93.5% RH (Dp H 2 O = 41.0 Pa). The respiration rate (r CO 2 ) at 0.5°C was set to 34.1E-9 mol.kg − 1 ·s − 1 (Hertog et al, 2001).…”

Section: Incorporating Fruit-to-fruit 6ariationmentioning

confidence: 99%

The impact of biological variation on postharvest population dynamics

Hertog

2002

Postharvest Biology and Technology

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This paper outlines a mathematical approach to the interpretation of postharvest batch behaviour based on the underlying processes occurring at the level of the individual food items and on the amount of biological variation present. This technique opens the door to a mechanistic interpretation of postharvest batch behaviour, both qualitative and quantitative, enabling the postharvest industries to improve their control of the quality of their produce throughout the postharvest chain. The generic approach is outlined and applied to case studies on shrivelling of 'Braeburn' apples, the colour change of 'Hass' avocados and stress crack development in corn grains.

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“…Surface area of the fruit was estimated from fruit mass using a regression equation (Clayton et al 1995). Pco 2 was calculated using a rearrangement of Equation 1 and Po 2 was calculated similarly, assuming that fruit had a respiratory quotient of unity (Yearsley et al 1997).…”

Section: Abbreviationmentioning

confidence: 99%

Effects of temperature on gas exchange of ‘Braeburn’ apples

Cheng

Banks

Nicholson

et al. 1998

New Zealand Journal of Crop and Horticultural Science

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Gas exchange attributes of fruits affect their responses to modified atmosphere and surface coating treatments. In this study, variations in respiration rate, internal partial pressures of O 2 and CO 2 , and skin permeance to O 2 and CO 2 associated with storage at 0, 5, 10, 15, 20, 25, and 30°C were characterised in 'Braeburn' apples (Malus domestica Borkh.) There was an 11-fold difference in respiration rate between fruit kept at 0 and 30°C, although permeance to each of the two respiratory gases differed only by a factor of two. The differing effects of temperature upon these two variables was responsible for the depression of internal O 2 and elevation of internal CO 2 associated with increase in temperature from 0 to 30°C. The magnitude of decline in internal O 2 was slightly greater than the increase in †Author to whom correspondence is to be addressed. H98028 Received 23 June 1998; accepted 28 August 1998internal CO 2 over the temperature range in the experiment. For apples that were respiring aerobically, and with a respiratory quotient of unity, this would indicate that the fruit skin had a somewhat higher permeance to CO 2 than to O 2 , Permeance values for the two respiratory gases were strongly related but permeance to CO 2 exceeded that to O 2 for fruit with a low permeance to O 2 . This is attributable to the greater ease of diffusion of CO 2 through the cuticle, an effect which became more pronounced as transcuticular diffusion was facilitated at high temperatures. Given the importance of internal atmosphere composition in affecting respiration rate and disorder development in apples, the gas exchange characteristics of 'Braeburn' appear likely to be influential in the outcome of different storage regimes.

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Estimation of apple fruit surface area

Cited by 57 publications

References 7 publications

Approaches to optimising surface coatings for fruits

Approaches to optimising surface coatings for fruits

The impact of biological variation on postharvest population dynamics

Effects of temperature on gas exchange of ‘Braeburn’ apples

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