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Agroinstitut Nitra, state enterprise is almost 50 years deparmently educational institution of the Ministry of Agriculture and Rural Development of the Slovak republic. It provides a broad portfolio of services mainly in the area of continuing vocational lifelong education, training and certification of Agricultural advisors, compiles specialized library collection, ensures effective and efficient access to information and information resources through information services and information technology. Portfolio of services is completed by hotel [...]

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Journal Article

Journal Article

Orange juice with pulp: impact of pasteurization and storage on flavour, polyphenols, ascorbic acid and antioxidant activity  [2014]

Sádecká, J.; Polovka, M.; Kolek, E.; Belajová, E.; et al. Department of Chemistry and Food Analysis, VÚP Food Research Institute, National Agricultural and Food Centre, Priemyselná 4, P. O. Box 25, SK-82475 Bratislava, Slovakia. Tel: 00421 2 50237 195, e-mail: polovka@vup.sk [Corporate Author]

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Effect of storage on volatile aroma compounds of orange juice with pulp of Brazilian origin processed in Slovakia was investigated during 4 months of its expiration period. Headspace – solid phase microextraction (HS-SPME) and gas chromatography – mass spectrometry (GC-MS) detection was involved to isolate and analyse the composition of the volatile fractions. Parallel gas chromatography – olfactometry (GC-O) analysis revealed forty-four key odorants, and their changes within the expiration period were characterized. d-Limonene, α-phellandrene, nonanal, decanal, linalool, l-limonene, ethyl octanoate, ethyl butanoate, nonanol and α-copaene were found to be principal aroma-active volatiles from the viewpoint of high and practically stable odour intensity during the shelf-life of the juice. Besides that, the results proved that aroma composition and overall flavour of orange juice changed during the storage. In addition, complementary measurements of ascorbic acid concentration, antioxidant activity, total polyphenols concentration and colour changes in the stored juice were carried out proving gradual worsening of all these parameters during the storage.
From the journal
JOURNAL OF FOOD AND NUTRITION RESEARCH

Bibliographic information

Type:
Journal Article
In AGRIS since:
2016
Volume:
53/n.4
All titles:
"Orange juice with pulp: impact of pasteurization and storage on flavour, polyphenols, ascorbic acid and antioxidant activity"@eng
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Bibliographic information

Type:
Journal Article
In AGRIS since:
2016
Volume:
53/n.4
All titles:
"Orange juice with pulp: impact of pasteurization and storage on flavour, polyphenols, ascorbic acid and antioxidant activity"@eng