<p>Etanolni ekstrakti tropa odabranih sorti cvekle (Detroit, Cardeal-F1, Egipatska, Bikor i Kestrel) preči&scaron;ćeni su primenom ekstrakcije na čvrstoj fazi (SPE). Sadržaj ukupnih<br />fenolnih jedinjenja, flavonoida i betalaina u preči&scaron;ćenim ekstraktima određeni su spektrofotometrijskim metodama. HPLC analizom utvrđen je kvalitativni i kvantitativni sastav fenolnih jedinjenja i betalaina ekstrakata tropa odabranih sorti cvekle. ESR spektroskopijom ispitana je antiradikalska aktivnost ekstrakata topa cvekle na stabilne DPPH i reaktivne superoksid anjon i hidroksil radikale.<br />Spektrofotometrijski je određena antioksidativna aktivnost na DPPH radikale i redukciona sposobnost po Oyaizu u ekstraktima odabranih sorti cvekle. Ispitana je in vitro<br />antiproliferativna aktivnost frakcija ekstrakata, njihovim delovanjem na rast tri histolo&scaron;ki različite humane ćelijske linije: MCF-7 (adenokarcinom dojke), HeLa (epitelni karcinom cerviksa)i MRC-5 (fetalni fibroblastni karcinom pluća). U zavr&scaron;noj fazi rada određena je antimikrobna aktivnost ekstrakata tropa odabranih sorti cvekle.</p> / <p> Beetroot (Detroit, Cardeal-F1, Egipatska, Bikor i Kestrel)<br /> pomace ethanol extracts were purified using solid phase<br /> extraction (SPE). Contents of total phenols, flavonoids and<br /> betalains in purified extracts were determined by spectrophotometric<br /> methods. HPLC analysis were used for quantitative<br /> and qualitative characterization of phenolic compounds<br /> and betalains in investigated extracts. ESR spectroscopy<br /> was used for investigation of antiradical activity of<br /> beetroot pomace extracts on stable DPPH and reactive<br /> superoxide anion and hydroxyl radicals. Antioxidant activity<br /> was determined spectrophotometrically on DPPH radicals<br /> and reducing power according to Oyaizu in the beetroot pomace<br /> extracts. Antiproliferative activity of investigated extracts<br /> was determined in vitro, testing their influence on the<br /> growth of three histologically different human cell lines:<br /> MCF-7 (breast adenocarcinoma), HeLa (cervix epithelioid<br /> carcinoma) and MRC-5 (fetal lung). Also, antimicrobial activity<br /> of beetroot pomace extracts was determined.</p>

<p>Acetonski ekstrakti bobičastog voća iz familija Ericaceae<br />(borovnica,<em> Vaccinium myrtillus</em> L., i brusnica, <em>Vaccinium<br />macrocarpon</em> L.) i Rosaceae (&scaron;ipak, <em>Rosa canina</em> L., i glog,<br /><em>Crataegus oxyacantha</em> L.) preči&scaron;ćeni su i frakcionisani<br />primenom ekstrakcije na čvrstoj fazi (SPE). Sadržaj ukupnih<br />polifenolnih jedinjenja, flavonoida i antocijana u preči&scaron;ćenim<br />ekstraktima određeni su spektrofotometrijskim metodama.<br />HPLC analizom utvrđen je kvalitativni i kvantitativni<br />sastav frakcija ekstrakata ispitivanih bobica. ESR spektroskopijom<br />ispitana je antiradikalska aktivnost frakcija ekstrakata<br />bobica na stabilne DPPH^● i reaktivne superoksid anjon i<br />hidroksil radikale. ESR spektroskopijom ispitano je i<br />prisustvo slobodnih radikala antioksidanata nastalih tokom<br />reakcije frakcija ekstrakata bobica sa superoksid anjon<br />radikalima. U zavr&scaron;noj fazi rada ispitana je<em> in vitro</em><br />antiproliferativna aktivnost frakcija ekstrakata bobica, njihovim<br />delovanjem na rast tri histolo&scaron;ki različite humane ćelijske<br />linije: HeLa (epitelni karcinom cerviksa), HT-29 (adenokarcinom<br />debelog creva) i MCF-7 (adenokarcinom dojke).</p> / <p>Acetone extracts of berries form Ericaceae (bilberry, <em>Vaccinium<br />myrtillus</em> L., and cranberry, <em>Vaccinium macrocarpon</em><br />L.) and Rosaceae (rose hip, <em>Rosa canina</em> L., and hawthorn,<br /><em>Crataegus oxyacantha </em>L.) families were purified and fractionated<br />using solid phase extraction (SPE). Contents of total<br />polyphenols, flavonoids and anthocyanins in purified extracts<br />were determined by spectrophotometric methods.<br />HPLC analysis were used for quantitative and qualitative<br />characterization of investigated berry extracts fractions. ESR<br />spectroscopy was used for investigation of antiradical activity<br />of berry extracts fractions on stable DPPH^● and<br />reactive superoxide anion and hydroxyl radicals. The<br />presence of antioxidant free radicals formed during reaction<br />of investigated berry extracts fractions with superoxide<br />anion radicals was also investigated by ESR. Antiprolixferative<br />activity of investigated berry extracts fractions was<br />determined<em> in vitro</em>, testing their influence on the growth of<br />three histologically different human cell lines: HeLa (cervix<br />epithelioid carcinoma), HT-29 (colon adenocarcinoma) i<br />MCF-7 (breast adenocarcinoma).</p>