Ethylene optical spectrometer for apple ripening monitoring in controlled atmosphere store-houses

The objective of this research was to investigate whether the medium used to transfer heat to a commodity influenced the mortality of Mexican fruit fly larvae. A similar 2-h heat dose was delivered to grapefruit via immersion in a variable temperature water bath or via exposure to a rapidly circulating gas. The concentration of oxygen and carbon dioxide inside the grapefruit was analyzed at 30-min intervals and grapefruit center temperatures recorded every 60 s during heating. The mortality of larvae located inside grapefruit during heating in a controlled atmosphere or in hot water was significantly higher than that of larvae located inside grapefruit heated in air. The internal atmosphere of grapefruit heated in a controlled atmosphere or in hot water contained significantly higher levels of carbon dioxide and lower levels of oxygen than grapefruit heated in air. Larval mortality was compared after larvae were heated in media by rapidly circulating air or by an atmosphere containing 4 kPa of oxygen and 18 kPa of carbon dioxide to evaluate whether the altered atmosphere or a heat-induced fruit metabolite was responsible for enhanced mortality. The significantly higher mortality of larvae heated in media in the presence of an altered atmosphere suggested that the altered atmosphere enhanced larval mortality. Results from this research suggest that reducing oxygen and or increasing the level of carbon dioxide during heating can enhance mortality of the Mexican fruit fly and potentially reduce the heat dose required for quarantine security.

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Controlled-atmosphere related disorders of fruits and vegetables

Stewart Postharvest Review ◽

10.2212/spr.2006.5.7 ◽

2006 ◽

Vol 2 (5) ◽

pp. 1-10 ◽

Cited By ~ 6

Author(s):

Robert K Prange and John M DeLong

Keyword(s):

Fruits And Vegetables ◽

Controlled Atmosphere

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Innovation in controlled atmosphere technology

Stewart Postharvest Review ◽

10.2212/spr.2005.3.9 ◽

2005 ◽

Vol 1 (3) ◽

pp. 1-11 ◽

Cited By ~ 9

Keyword(s):

Controlled Atmosphere

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Thickness dependent dielectric properties of calcium copper titanate ceramics measured in a controlled atmosphere

Ceramics International ◽

10.1016/j.ceramint.2019.05.192 ◽

2019 ◽

Vol 45 (13) ◽

pp. 16554-16563

Author(s):

Disna P. Samarakoon ◽

Raj N. Singh

Keyword(s):

Dielectric Properties ◽

Controlled Atmosphere ◽

Calcium Copper Titanate ◽

Titanate Ceramics

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Effect of Storage Conditions on Storability and Antioxidant Potential of Pears cv. ‘Conference’

Agriculture ◽

10.3390/agriculture11060545 ◽

2021 ◽

Vol 11 (6) ◽

pp. 545

Author(s):

Grzegorz P. Łysiak ◽

Krzysztof Rutkowski ◽

Dorota Walkowiak-Tomczak

Keyword(s):

Mass Loss ◽

Strong Influence ◽

Storage Conditions ◽

Quality Parameters ◽

Soluble Solids ◽

Controlled Atmosphere ◽

Postharvest Diseases ◽

Market Prices ◽

Long Period ◽

The Impact

Late pear cultivars, such as ‘Conference’, can be stored for a long period if kept in good storage conditions. A three-year study (2011–2013) compared the impact of six-month storage using four technologies—normal atmosphere, normal atmosphere + 1-methylcyclopropene (1-MCP), controlled atmosphere, and controlled atmosphere + 1-MCP—on the quality parameters of ‘Conference’ pears, such as mass loss, firmness, total soluble solids, acidity, antioxidant capacity, and the incidence of diseases and disorders. Additionally, the study analysed different storage conditions in terms of profitability, based on the market prices for pears in the seasons during which the pears were stored. The storage conditions had a very strong influence on the fruit quality parameters, and were found to affect most visibly the mass loss and the incidence of postharvest diseases and disorders. The storage of ‘Conference’ pears for 180 days in normal atmosphere is not economically viable, even if the fruit is subjected to 1-MCP treatment; at the same time, it is profitable to store ‘Conference’ pears in controlled atmosphere for the same period, no matter whether 1-MCP was applied or not.

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Investigating the effect of oxalic acid and salicylic acid treatments on the post-harvest life of temperate grown apricot varieties (Prunus armeniaca) during controlled atmosphere storage

Food Science and Technology International ◽

10.1177/10820132211032074 ◽

2021 ◽

pp. 108201322110320

Author(s):

Mariya Batool ◽

Omar Bashir ◽

Tawheed Amin ◽

Sajad Mohd Wani ◽

FA Masoodi ◽

...

Keyword(s):

Salicylic Acid ◽

Oxalic Acid ◽

Chilling Injury ◽

Quality Attributes ◽

Prunus Armeniaca ◽

Soluble Solids ◽

Carotenoid Content ◽

Total Phenolic ◽

Controlled Atmosphere ◽

Injury Index

This study aimed at investigating the influence of different postharvest treatments with oxalic acid (OA) and salicylic acid (SA) on quality attributes and postharvest shelf life of temperate grown apricot varieties stored under controlled atmosphere (CA) storage conditions. After each treatment was given, the samples were stored in CA store maintained at a temperature of 0 °C, 90 ± 5% relative humidity, 5% oxygen and 15% carbon dioxide for 30 days. Results indicated that both OA and SA treatments significantly (p ≤ 0.05) retained total soluble solids, titratable acidity, color profile, ascorbic acid content and total phenolic content of apricot varieties and had a positive effect on antioxidant activity and texture of samples compared to control. However, carotenoid content was found to be higher in control. Both the treatments reduced chilling injury index, weight loss and decay percentage of samples. Moreover, it was found that SA treatment was the most effective treatment in maintaining visual color of apricots while OA maintained fruit firmness and effectively decreased the decay percentage and chilling injury index of apricot varieties. In conclusion, it was found that both OA and SA have the potential to extend storage life of apricots and maintain quality attributes of the crop during CA storage.

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