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Dive into the research topics where Karmela Delonga is active.

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Featured researches published by Karmela Delonga.


Journal of Horticultural Science & Biotechnology | 2012

Influence of potassium fertilisation on the levels of phenolic compounds in sweet potato (Ipomoea batatas L.) leaves

Ivana Radojčić Redovniković; Mara Bogović; Dubravko Belko; Karmela Delonga; Sanja Fabek; Bruno Novak; Nina Toth

Summary The nutritional value of sweet potato leaves (Ipomoea batatas L.) has recently been emphasised as their anti-oxidant and phenolic compounds can improve human health and provide nutritional benefits. This has increased the interest of the food industry and of consumers in using sweet potato greens as a functional food. To increase the level of phenolic compounds in sweet potato leaves, we studied the influence of potassium (K)-fertilisation at different N:K ratios [namely 1:1 (control), 1:2.5, or 1:5] on the phenolics contents and corresponding anti-oxidant activities of two cultivars of sweet potato, ‘Bat1’and ‘Boniato’. In general, enhanced K-fertilisation increased the level of phenolic compounds and the corresponding anti-oxidant activity. However, the two cultivars differed in their response to K-fertilisation. Phenolic acids were increased (by approx. 20%) in ‘Bat1’ only after the application of N:K at a ratio of 1:5, while K-fertilisation at all rates increased the flavonoid contents of both cultivars (by approx. 300%). Our results could be useful for sweet potato producers who wish to make informed decisions on which cultivar and/or mineral fertiliser regime to choose in order to produce sweet potato leaves of the desired nutritional quality.


Periodicum Biologorum | 2008

Glucosinolates and their potential role in plant

Ivana Radojčić Redovniković; Tatjana Glivetić; Karmela Delonga; Jasna Vorkapić-Furač


Food Chemistry | 2005

The study of phenolic profiles of raw apricots and apples and their purees by HPLC for the evaluation of apricot nectars and jams authenticity

Jasna Pospišil; Branka Levaj; Karmela Delonga


Journal of Agricultural and Food Chemistry | 2005

Phenolic profiles of raw apricots, pumpkins, and their purees in the evaluation of apricot nectar and jam authenticity.

Karmela Delonga; Branka Levaj; Senka Djakovic; Jasna Pospišil


International Journal of Food Science and Technology | 2011

Changes of phenolic compounds and antioxidant capacity in cocoa beans processing

Slavica Mazor Jolić; Ivana Radojčić Redovniković; Ksenija Marković; Đurđica Ivanec Šipušić; Karmela Delonga


Czech Journal of Food Sciences | 2018

Polyphenolic content and composition and antioxidative activity of different cocoa liquors.

Ivana Radojčić Redovniković; Karmela Delonga; Slavica MazoR; Marija Carić; Jasna Vorkapić-Furač


Food Technology and Biotechnology | 2010

Polyphenols and Volatiles in Fruits of Two Sour Cherry Cultivars, Some Berry Fruits and Their Jams

Branka Levaj; Karmela Delonga; Karin Kovačević Ganić; Mara Banović; Danijela Bursać Kovačević


Acta Alimentaria | 2010

EFFECT OF DRYING CONDITIONS ON INDOLE GLUCOSINOLATE LEVEL IN BROCCOLI

V. Mrkić; I. R. Redovnikovic; S. M. Jolic; Karmela Delonga


Food Technology and Biotechnology | 2008

Glucosinolate Profiles, Myrosinase and Peroxidase Activity in Horseradish (Armoracia lapathifolia Gilib.) Plantlets, Tumour and Teratoma Tissues

Ivana Radojčić Redovniković; Petra Peharec; Marijana Krsnik-Rasol; Karmela Delonga; Karolina Brkić; Jasna Vorkapić-Furač


Acta Alimentaria | 2007

Distribution of glucosinolates in some raw and processed Brassica vegetables grown in Croatia

Karmela Delonga; I. Radojčić Redovniković; V. Mrkić; Jasna Vorkapić-Furač

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