Controlling the nutrient profile of fruits and vegetables during prolonged storage prior to processing

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Robertson, Jim (author)

Controlling the nutrient profile of fruits and vegetables during prolonged storage prior to processing

Article/chapterEnglish2009

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2009

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LIBRIS-ID:oai:research.chalmers.se:7841c52c-c56e-4154-8935-8210569fde87
https://research.chalmers.se/publication/254563URI

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Language:English
Summary in:English

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Subject category:kon swepub-publicationtype
Subject category:ref swepub-contenttype

Notes

The seasonal nature of fruit and vegetable crops requires either that supply is maintained over a wide geographical distribution range or that produce can be stored relatively long term. We have shown that relatively long term storage of fruit and vegetables can be undertaken with little deterioration in texture and without compromising microbiological safety. Associated experiments, to test produce from different geographical locations have also been undertaken. The availability of fruits and vegetables for processing offers the opportunity to develop novel products, with improved quality and stability for transport and shelf-life. The effect of transport and storage on nutrient profile was studied in carrots, broccoli and tomatoes. Phytochemicals assayed include carotene, lycopene, folate, and ascorbic acid. The plant cell wall composition, free sugars and fibre content have also been determined. In carrot (mg/g dry weight), -carotene was ?0.7mg; ascorbic acid ?0.3mg, sugars ?500mg, and dietary fibre ?300mg. In broccoli, corresponding nutrients were: ascorbic acid up to 8.6mg, folate ?0.005mg, sugars ?250mg, and dietary fibre ?400mg. In tomato, corresponding nutrients were: lycopene ?0,8mg, ascorbic acid ?2.5 mg, sugars ?480mg, and dietary fibre ?400mg. The storage conditions chosen were temperatures of 2-4°C and relative humidity between 70 and 99%, depending on the raw materials. During storage, little change was found in sample compositions post harvest. Fully ripe tomatoes had lost some lycopene but vitamin C in broccoli increased during storage. Although total dietary fibre content did not change during storage there was a noted modification to constituent pectic polysaccharides; shown as a loss of pectic arabinan andgalactan in carrot. The results show that carefully controlled storage conditions were appropriate for the purpose of maintenance or enhancement of nutritional and textural properties. However, shelf life of produce may be compromised by transport conditions. It is therefore recommended to keep transport time short and to ensure that optimum storage conditions can be maintained during transport. Preliminary results indicate that transport rather than storage conditions are the major problem in maintaining product nutrient profile and microbiological quality prior to processing.

Subject headings and genre

TEKNIK OCH TEKNOLOGIER Kemiteknik hsv//swe
ENGINEERING AND TECHNOLOGY Chemical Engineering hsv//eng
Carotene
Transport
Storage
Dietary fibre
Ascorbic acid
Nutrient stability
Fruits
Vegetables
Folate

Added entries (persons, corporate bodies, meetings, titles ...)

Alminger, Marie,1957Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)mariealm (author)
Svelander, Cecilia,1980Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)kb00svce (author)
Wellner, Anna,1982Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)wellner (author)
Niemann, ClaudiaHumboldt-Universität zu Berlin,Humboldt University of Berlin (author)
Rodarte, AlejandroHumboldt-Universität zu Berlin,Humboldt University of Berlin (author)
Werner, RalphHumboldt-Universität zu Berlin,Humboldt University of Berlin (author)
Wellner, Nicholas (author)
Waldron, Keith (author)
Chalmers tekniska högskolaHumboldt-Universität zu Berlin (creator_code:org_t)

Related titles

In:5th International Technical Symposium on Food Processing, Monitoring Technology in Bioprocesses and Food Quality Management, s. 337-342

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https://research.chalmers.se/publication/254563

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