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Title:Vpliv osvetljenosti smreke (Picea abies) na vsebnost vitamina C v smrekovih vršičkih
Authors:Celcar, Špela (Author)
Kristl, Janja (Mentor) More about this mentor... New window
Sem, Vilma (Co-mentor)
Files:.pdf UN_Celcar_Spela_2019.pdf (895,74 KB)
MD5: 89527774108E779E30A123383AFF4066
 
Language:Slovenian
Work type:Bachelor thesis/paper (mb11)
Typology:2.11 - Undergraduate Thesis
Organization:FKBV - Faculty of Agriculture and Life Sciences
Abstract:Cilji raziskave so bili preučiti vpliv osvetljenosti in starosti dreves na koncentracijo vitamina C v smrekovih vršičkih ter raziskati vsebnost vitamina C v sirupu, pripravljenem iz smrekovih vršičkov. Vršičke smo nabrali na Sv. Treh kraljih na Pohorju. V izvlečkih vršičkov in sirupa smo koncentracijo skupnega vitamina C določili po redukciji dehidroaskorbinske kisline v askorbinsko kislino z dodatkom ditiotreitola. Vsebnost vitamina C smo določali s tekočinsko kromatografijo visoke ločljivosti (HPLC). Povprečna vsebnost vitamina C v vršičkih s sončne lege je znašala 1087 mg/100 g suhe snovi, v vršičkih s senčne lege pa 916 mg/100 g suhe snovi. V sirupu je bila povprečna vsebnost vitamina C (11,6 mg/100 g sveže snovi) bistveno nižja kot v vršičkih. S statistično analizo rezultatov smo ugotovili, da je korelacija med vsebnostjo vitamina C v smrekovih vršičkih in sirupu statistično značilna. Vršički s sončne strani imajo značilno višjo vsebnost vitamina C kot vršički s senčne strani. Korelacija med vsebnostjo vitamina C v smrekovih vršičkih in obsegom debla (s tem tudi s starostjo) smreke ni statistično značilna.
Keywords:smreka (Picea abies, smrekovi vršički, sirup, vitamin C, osvetljenost
Year of publishing:2019
Source:Maribor
NUK URN:URN:SI:UM:DK:CBST5JT9
Views:634
Downloads:132
Metadata:XML RDF-CHPDL DC-XML DC-RDF
Categories:FKBV
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Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:14.08.2019

Secondary language

Language:English
Title:The Effect of Insolation on the Vitamin C Content in Spruce (Picea abies) Tips
Abstract:The purpose of the presented study was to investigate the effects of insolation and tree age on the vitamin C content in spruce tips. Additionally, we measured the content of vitamin C in spruce tip syrup. Spruce tips were collected at the location of Sv. Trije kralji on Pohorje, NE Slovenia. The concentration of total vitamin C in the extracts of the spruce tips and the syrup was determined after the reduction of dehydroascorbic acid to ascorbic acid with the addition of dithiothreitol. The concentration of vitamin C in spruce tips and syrup was measured by high performance liquid chromatography (HPLC). The average value of vitamin C in spruce tips that were exposed to sunlight was 1087 mg/100 g of dry weight and in shaded spruce tips 916 mg/100 g of dry weight. The average vitamin C content in syrup (11,6 mg/100 g of fresh weight) was considerably lower when compared to the average value obtained for the spruce tips. Statistical analysis of the results showed that the correlation between vitamin C content in spruce tips and syrup is statistically significant. Insolated spruce tips showed a significantly higher level of vitamin C than shaded tips. The correlation between vitamin C content in spruce tips and trunk girth (age) was not statistically significant.
Keywords:spruce (Picea abies), spruce tips, syrup, vitamin C, insolation


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