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Primerjava vsebnosti antioksidantov v plodovih aronije glede na njihovo izpostavljenost soncu = Analysis of antioxidants content in aronia berries according to their sun exposure : University Study Programme of CosmetologyTopler, EvaAronija je rastlina, ki ji prepisujejo mnoge zdravilne lastnosti, saj ima veliko vsebnost antioksidantov, ki so za človekovo zdravje nepogrešljivi. Začetek njene uporabe sega že v čase Indijancev, ki ... so jo uporabljali za zdravljenje najrazličnejših bolezni, pa tudi za konzerviranje mesa in sadja. Največji delež antioksidantov v aroniji predstavljajo polifenoli in sicer antocianini, ki so odgovorni za barvo, ter proantocianidini in tanini, ki dajejo rastlini značilen trpek okus. Zadnje študije kažejo, da ima aronija pozitivne učinke pri zaviranju procesa staranja, razrasti rakavih celic, kardiovaskularnih bolezni ter sladkorne bolezni. V diplomski nalogi smo iz zamrznjenih plodov aronije izdelali etanolne izvlečke ter preverjali celokupno vsebnost polifenolov in antocianinov glede na osojno oziroma prisojno stran grma. Vsebnost celokupnih polifenolov smo preverjali s pomočjo Folin-Ciocâlteujevega reagenta in merjenja absorbance vzorcev ter standarda, ki je bil v našem primeru galna kislina. Za metodo celokupne vsebnosti antocianinov pa smo potrebovali 0,1 M raztopino HCl. Tudi v tem primeru smo merili absorbance in rezultat preračunali tako, da smo dobili vsebnost antocianinov v mg/g plodu. Rezultati meritev so tako za polifenole kot tudi za antocianine pokazali, da prevladujejo na osojni strani, vendar pa so razlike zelo majhne. Nekoliko večje razlike med prisojno in osojno stranjo smo opazili pri vsebnosti celokupnih antocianinov pri grmih dva in tri. Na drugem grmu je vsebnost antocianinov skoraj za polovico večja na osojni strani kot na prisojni, medtem ko na grmu tri antocianini prevladujejo na prisojni strani. Pri izračunu standardnih deviacij opazimo, da so razlike med plodovi dokaj velike in tudi T- testi nam povejo, da rezultati niso statistično značilni, zato trditve, da osojna in prisojna lega vplivata na vsebnost antioksidantov, ne moremo ne potrditi in ne zavreči.Type of material - undergraduate thesis ; adult, seriousPublication and manufacture - Ljubljana : [E. Topler], 2020Language - slovenianCOBISS.SI-ID - 28150787
Author
Topler, Eva
Other authors
Kreft, Samo
Topics
Polifenoli |
Antioksidanti |
aronija |
etanolni izvlečki |
antocianini |
FC reagent |
absorbanca |
rast na osojni strani |
rast na prisojni strani
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Library | Call number – location, accession no. ... | Copy status |
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Faculty of Pharmacy, Lj. | Knjižnica UNK 66.02 TOPLER EVA Primerjava 209 IN: 0016685 |
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Database name | Field | Year |
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Topler, Eva | ![]() |
Kreft, Samo | 15460 |
Source: Personal bibliographies
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