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  • Author or Editor: M. Szalay x
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A HPLC instrument was used to analyse various acid (citric, malic, succinic acid) and sugar (sucrose, glucose, fructose, sorbitol) components in the fruit of three cultivars grown in Hungary (Gönci magyar kajszi, Mandulakajszi and Harcot), while the β-carotene content was analysed spectrophotometrically. Changes in the chemical content of apricot varieties have not previously been monitored in the course of ripening. The quality of various food products is greatly influenced by the chemical components of the raw materials.The cultivar Gönci magyar kajszi had exceptionally high β-carotene (3.79 mg/100 g in 90% maturity) and sugar content (sucrose: 11253.9 mg/100 g, fructose: 315.2 mg/100 g and glucose: 1434.8 mg/100 g). Mandulakajszi was the most acidic (citric acid: 1597.2 mg/100 g). The malic acid content was similar for all three varieties during ripening. In case of Harcot, the β-carotene content was high in 2008 (3.58 mg/100 g in 90% maturity), however in 2010 it was lower due to environmental influences (2.38 mg/100 g). The pH value was similar for all examined varieties in all ripening stages (3.16–3.50), the TSS/TA value was highest in the 100% mature fruit (18.41) of Gönci magyar kajszi.

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Apricot is an important fruit species in Hungary both for fresh consumption and processing. Physical parameters and change of nutrients of nine apricot cultivars were studied during the ripening period. Four Hungarian and five North-American apricot cultivars were chosen for investigation. Changes in the physical parameters were measured by three different methods (Magness-Taylor hand penetrometer, Bookfield CT3 Texture Analyser with TA 44 and TA 9 measuring head). Significant differences in flesh firmness among the cultivars were observed mainly at the beginning of ripening time. Adhesiveness, cohesiveness and chewiness of the fruits decreased continuously during ripening. The studied cultivars showed significant differences in these traits. Sugar and acid contents were also measured during ripening. The cultivars showed small differences in sugar content and bigger differences in acid content of the fruits. Our data measured and collected during this study can be useful in characterizing the apricot cultivars studied. Changes in the texture parameters responsible for transportability and the technological usability of the fruits were described across the whole ripening period. Our results may help growers as well as food technologists to determine the optimum harvest date of cultivars intended to be used for different purposes.

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