Zmiany jakosci przechowywanych syropow z owocow zurawiny [Vaccinium oxycoccus L.] i brusznicy [Vaccinium vitis-idaea L.] otrzymanych roznymi metodami

• Autorzy: Michalczyk M , Macura R. , Zlobecki A.

Warianty tytułu

EN

Quality changes found in the stored cranberry [Vaccinium oxycoccus L.] and cowberry [Vaccinium vitis-idaea L.] syrups manufactured using different methods

• Języki publikacji: PL

Abstrakty

PL

W pracy scharakteryzowano syropy z owoców żurawiny i brusznicy, otrzymane trzema zmodyfikowanymi metodami stosowanymi w gospodarstwach domowych, pod względem zawartości związków biologicznie czynnych (antocyjanów, polifenoli, witaminy C) oraz właściwości przeciwutleniających i barwy (L*a*b*). Modyfikacje metod otrzymywania syropów dotyczyły rozgniatania i podgrzewania owoców z cukrem. Ze względu na zawartość analizowanych związków oraz barwę uzyskanych produktów, najwłaściwszą modyfikacją uznano równoczesne rozgniatanie i podgrzewanie surowca. W przechowywanych syropach, do czwartego miesiąca zwiększała się ogólna zawartość związków fenolowych, a do ósmego miesiąca siła redukująca, będąca miernikiem właściwości przeciwutleniających. Zawartość pozostałych składników, w tym witaminy C, wyraźnie zmniejszała się. Antocyjany zawarte w brusznicy przechodziły do syropów w mniejszym stopniu niż zawarte w żurawinie i szybciej ulegały rozkładowi w czasie przechowywania.

EN

In this paper, the cranberry (Vaccinium oxycoccus L.) and cowberry (Vaccinium vitis-idaea L.) syrups manufactured using three modified home methods were characterized with regard to their biologically active substances (anthocyanins, polyphenols, vitamin C), as well as to their antioxidant activity and colour (L*a*b*). The modifications in the methods of manufacturing syrups referred to squashing and heating fruit with sugar. Considering the content of the compounds analyzed and colour of the final product, the simultaneous squashing and heating of raw material was found to be the most fitting modification. In the syrups stored, their total phenolic content increased until the fourth month, and the reducing strength, an indicator of antioxidant properties, increased until the eighth month. The content of the remaining compounds, including vitamin C, significantly decreased. Anthocyanins contained in the cowberry passed into the syrups less effectively than those originating from the cranberry, and, also, they faster decomposed during the storage period.

Słowa kluczowe

PL

owoce; zurawina; Oxycoccus quadripetalus; brusznica zob.borowka brusznica; borowka brusznica; Vaccinium vitis-idaea; syropy owocowe; przechowywanie; zmiany jakosciowe; barwa; antocyjany

• Wydawca: -
• Czasopismo: Żywność Nauka Technologia Jakość
• Rocznik: 2007
• Tom: 14
• Numer: 6
• Opis fizyczny: s.116-126,rys.,tab.,bibliogr.

Twórcy

autor

Michalczyk M

• Akademia Rolnicza im.H.Kollataja, ul.Balicka 122, 30-149 Krakow

autor

Macura R.

autor

Zlobecki A.

Bibliografia

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