Use this url to cite publication: https://hdl.handle.net/20.500.12259/91062
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The antioxidant properties of leaves of selected cultivars of sweet potato (Ipomoea batatas L. Lam.)
Type of publication
Konferencijų tezės nerecenzuojamame leidinyje / Conference theses in non-peer-reviewed publication (T2)
Author(s)
Krochmal-Marczak, Barbara | State Higher Vocational School names Stanislaw Pigonia in Krosno | PL |
Sawicka, Barbara | Lublin University of Life Sciences | PL |
LT | ||
LT |
Title
The antioxidant properties of leaves of selected cultivars of sweet potato (Ipomoea batatas L. Lam.)
Is part of
International Scientific Conference "New trends in Food safety and quality" NIFSA 2017, 5 - 7 October 2017, Aleksandras Stulgiskis University, Lithuania. Akademija, 2017
Date Issued
Date Issued |
---|
2017 |
Publisher
Akademija, 2017
Extent
p. 68-69
Field of Science
Abstract
The oxidation activity of Ipomoea batatas leaf infusion was analysed with the use of Brand-Williams’ spectrophotometric method with a synthetic DPPH reagent. The absorptance of solutions was measured at wave length of λ= 517 nm. All measurements were performed in three repetitions. The greatest ability of DPPH free radical scavenging was demonstrated by infusions at 100 °C. The ability to neutralise free radicals was the highest in leaf infusions of the Okinawa cultivar, and the smallest in infusions of Carmen Rubin leaves. The infusion time was also significant for the antioxidant properties of the infusions. It was shown that 5-minute infusions were characterised by the greatest antioxidant potential as compared to 2- and 10-minute infusions.
The leaves of sweet potato (Ipomoea batatas L.) contain a lot of vitamins beneficial for human health, e.g.: A, C, B (riboflavin). They are a great source of lutein, macro- and microelements and bioactive compounds, including antioxidants. They are characterised by a wide range of properties, including antioxidation. Eating sweet potato leaves can prevent cancer, systemic, cardiovascular or neurological diseases. Therefore, the aim of this research was to determine the contents of antioxidants in the leaves of several sweet potato cultivars. The results of the study were based on a field experiment conducted between 2015-2016 in South Eastern Poland (49.83°N; 21.85°E) in brown earth with slightly acidic pH. The experiment involved a randomised block design and 3 repetitions. The study included 10 sweet potato cultivars (Okinawa, Georgia Jet, Satsumo Imo, Beauregard, Molokai, Purple, Radiosa, White Triumph, Speckled Purple, Carmen Rubin) with various skin and flesh colours. The experiment was commenced in mid-May by planting rooted seedlings. Fertilisation remained constant during the whole experiment (80 kg N, 35 kg P, 100 kg K and 25 t.ha-1 of manure). During vegetation, potatoes were cultivated according to good agricultural practice. In BBCH phase 19 (on a 99-point BBCH scale), in the first ten days of July, 30 leaves were sampled from each sweet potato cultivar and field repetition for chemical analyses. The leaves were dried until solid with the use of thermal drying according to PN-EN ISO 712. Then, 2 grams of dried leaves was weighted and infused by pouring distilled water (100 ml) at 80° and 100 °C into the samples. The analysis of antioxidant properties of the dried sweet potato leaf infusion involved three infusion times: 2.5 and 10 minutes. The study of antioxidant effectiveness was based on the ability to deactivate free radicals with the use of the DPPH reagent.
Type of document
type::text::conference output::conference proceedings::conference paper
Language
Anglų / English (en)
Coverage Spatial
Lietuva / Lithuania (LT)