magistrsko delo
Kristina Sodin (Author), Janja Kristl (Mentor), Vilma Šuštar (Co-mentor)

Abstract

Vršički navadne smreke so bogat vir vitamina C, vsebujejo mineralne snovi, polifenole in terpene. Njihova vsebnost je odvisna od razpoložljivosti hranil v tleh, starosti iglic in dreves, položaja iglic znotraj krošnje in letnega časa. Namen magistrske naloge je bil preučiti vpliv osončenosti na koncentracijo organskih kislin in sladkorjev v vršičkih navadne smreke in sirupu iz smrekovih vršičkov. Vršičke smo nabrali na Sv. Treh Kraljih na Pohorju. Vsebnost organskih kislin in sladkorjev smo določili s tekočinsko kromatografijo visoke ločljivosti (HPLC) v povezavi z PDA in RI detektorjem. V smrekovih vršičkih je prevladovala kininska kislina s povprečno vsebnostjo 196 mg/g suhe snovi (SS). Po vsebnosti so ji sledile šikimska, citronska in jabolčna kislina. Med sladkorji je prevladovala saharoza, glukoze je bilo manj, fruktoza je bila pod mejo določljivosti. Osončenost na vsebnost organskih kislin in sladkorjev v vršičkih ni imela značilnega vpliva. Med vsebnostjo kislin oziroma sladkorjev v smrekovih vršičkih in v sirupu ni bilo statistično značilne korelacije

Keywords

navadna smreka;(Picea abies (L.) Karst);kisline;sladkorji;vršički;sirup;osončenost;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UM FKBV - Faculty of Agriculture
Publisher: [K. Sodin]
UDC: 582.475.3:543:54-32+547.455(043)=163.6
COBISS: 144293123 Link will open in a new window
Views: 20
Downloads: 2
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Other data

Secondary language: English
Secondary title: The effect of insolation on sugar and acid content in spruce (picea abies) tips
Secondary abstract: Norway spruce tips are rich in vitamin C, minerals, polyphenols and terpenes. Their content depends on the availability of nutrients in the soil, the age of the needles and the trees, the position of the needles in the canopy and the season. The aim of the master's thesis was to investigate the influence of insolation on the concentration of organic acids and sugars in Norway spruce tips and spruce syrup. Spruce tips were collected on Sv. Trije Kralji in the Pohorje mountains. The content of organic acids and sugars was determined via high-performance liquid chromatography (HPLC) with a PDA and RI detector. Quinic acid dominated in spruce tips with an average content of 196 mg/g dry matter (SS). It was followed by shikimic acid, citric acid and malic acid. Among sugars, sucrose was the most predominant, glucose was lower and fructose was below the detection limit. Insolation had no significant effect on the content of organic acids and sugars in the tips. There was no statistically significant correlation between the content of acids and sugars in the spruce tips and syrup
Secondary keywords: Norway spruce;(Picea abies (L.) Karst);acids;sugars;tips;syrup;insolation;Univerzitetna in visokošolska dela;
Type (COBISS): Master's thesis/paper
Thesis comment: Univ. v Mariboru, Fak. za kmetijstvo in biosistemske vede
Pages: 1 spletni vir (1 datoteka PDF (XI, 43, [12] str.))
ID: 17813598