Authors

Transformation's kinetic reaction of organic acids during the cold storage of Tangor (Ortanique)

UDC 634.3

Transformation's kinetic reaction of organic acids during the cold storage of Tangor (Ortanique)

Kolodyazna V.S., Boulkrane M.S.

Abstract
Both maximum preservation of biological value and minimizing damage from physiological and infectious diseases are of great importance for long-term storage of citrus fruits being imported into Russia from subtropical countries. Tangor (Ortanique) fruits are of great biologically active substances content, with organic acids referred to as parapharmaceuticals being among them. Organic acids are subjected to oxidation-reduction reaction during storage, speed of reaction depending on type of fruits, the temperature and time of storage. In this paper composition and kinetics of changes in the organic acid content during storage at low positive temperatures are analyzed by gas-liquid chromatography and mass spectrometry for the first time. Ortanique fruits from Algeria have been chosen as the material for experiments. 18 organic acids have been identified in the fruits, citric, malic, quinic и gluconic ones being the predominant. The total content of organic acids is shown to decrease by 29% during 60 day storage. The citric, oxalic, and galacturonic and citraconic acids are shown to have maximum rate of conversion, with benzoic, erythric and quinic acids having the minimum one.

Keywords: Tangor (Ortanique) citrus fruits, organic acids, cold storage, oxidizing kinetic.

All references

1. Milind S. Ladaniya.Citrus fruit biology, technology and evaluation. 84 Theobald’s Road, London WC1X 8RR, UK:Elsevier, 2008. P. 1-4.

2. FAO. Pesticide residues in food 2012. FAO, Rome. 2013. ISBN 9789251075586. Gutter, Y., 1970. Effectiveness of thiabendazole and benomyl in controlling green mould of Shamouti and Valencia oranges. Israel J. Agric. Res. 20, р. 91-95.

3. Dou, H., 2004. Effect of coating application on chilling injury of grapefruit cultivars. Hortic. Sci. 39, р. 558-561.

4. Igual, García-Martínez, Camacho, Martínez-Navarrete. Effect of thermal treatment and storage on the stability of organic acids and the functional value of grapefruit juice. Food Chemistry, 2010, Volume 118, Issue 2, р. 291-299.

5. Ларина Т.В. Тропические и субтропические плоды. Справочник. – М.: ДеЛи принт,2002. 254 с. [Larina T.V. Tropical and subtropical fruits. Reference manual. Moscow, 2002. 254 p. (in Russian)]

6. Самородова-Бианки Г.Б., Стрельцина С.А. Исследование биологически активных веществ плодовых культур. – Л.: ВИР им. Н.И. Вавилова. 2009. 82 с. [Samorodova-Bianki G.B.,Strel'tsina S.A. Research biological the active agents of fruit crops. Leningrad, 2009. 82 p. (in Russian)]

7. Колодязная В.С., Булькран.М.С. Пищевая ценность цитрусовых плодов клементинов, выращиваемых в Алжире // Сбор. науч. тр. VI Международной научно-технической конференции «Низкотемпературные и пищевые технологии в XXI веке»,13-15 ноября 2013. С.413-414. [Kolodyaznaya V.S., Boulkrane M.S. Nutrition value of citrus fruits of the clementines which are grown up in Algeria. The Collection of scientific works of theInternational scientific and technical conference "The Low-temperature and Food Technologies in the XXI Century", 2013. p.413-414. (in Russian)]

8. Колодязная В.С .,Булькран.М.С, Кинетика изменения количества органических кислот в плодах клементинов при холодильном хранении с применением биопрепаратов. // Сбор.науч.тр. III Всероссийского конгресса молодых ученых,8-11 апреля, 2014.-С .40-42. [Kolodyaznaya V.S., Boulkrane M.S. Kinetics of change of amount of organic acids in fruits of clementines in case of refrigerating storage using биопрепаратов. The Collection of scientific works of the III All-Russian congress of young scientists, 2014. P. 40-42. (in Russian)]

9. Sun, X.-H., Xiong, J.-J., Zhu, A.-D., Zhang, L., Ma, Q.-L., Xu, J., Cheng, Y.-J., Deng, X.-X-., 2012. Sugars and organic acids changes in pericarp and endocarp tissues ofpumelo fruit during postharvest. Scientia Horticulturae 142, p. 112–117.

10. Chen, F. X., Liu, X. H., & Chen, L. S. (2009). Developmental changes in pulp organic acid concentration and activities of acid-metabolizing enzymes during the fruit development of two loquat (Eriobotrya japonica Lindl.) cultivars differing in fruit acidity. Food Chemistry, 114, p. 657–664.

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