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Title:Vpliv ekstrakcijskega postopka na kvaliteto ekstraktov iz liofiliziranih hrušk (pyrus communis)
Authors:ID Tržan, Primož (Author)
ID Knez Marevci, Maša (Mentor) More about this mentor... New window
ID Cör Andrejč, Darija (Comentor)
Files:.pdf VS_Trzan_Primoz_2018.pdf (5,44 MB)
MD5: 579B2D5F07CD0D380F0BA2FC25E84E31
PID: 20.500.12556/dkum/89e8e97c-8161-429a-9d46-59263e70d234
 
Language:Slovenian
Work type:Bachelor thesis/paper
Typology:2.11 - Undergraduate Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:Za ekstrakcijo komponent iz naravnih materialov se uporabljajo različne tehnike. Glavni namen diplomskega dela je bil določitev najustreznejše ekstrakcijske tehnike ter izbire konvencionalnega topila, ki daje najboljši izkoristek ekstrakcije in pri tem ne uniči biološko aktivnih komponent. V ekstraktu iz liofiliziranih hrušk smo določili vsebnost sladkorjev. V ekstraktih, pridobljenih z ekstrakcijo po Soxhletu, hladno ter ultrazvočno ekstrakcijo smo določevali antioksidativno aktivnost, totalne ogljikove hidrate, proteine in betalaine ob uporabi topil metanol, etanol ter etanol-voda. Ugotovili smo, da največji izkoristek ekstrakcije da hladna ekstrakcija s topilom metanol (47,78 %), kjer smo hkrati določili najvišjo vsebnost totalnih ogljikovih hidratov v ekstraktu (431 g OH/kg vzorca). Najvišjo antioksidativno aktivnost smo izmerili v ekstraktu dobljenem po hladni ekstrakciji z etanolom (2,27 %), vendar je masni izkoristek same ekstrakcije zelo nizek (11,24 %). Višje izkoristke smo dobili v primeru, ko smo kot topilo uporabili metanol ne glede na metodo. Po Soxhletovi ekstrakciji smo določili najvišjo vsebnost proteinov v ekstraktih ne glede na izbrano topilo, največ s topilom etanol (474 g proteinov/kg vzorca), medtem ko smo pri določanju betalainov izmerili najnižje vrednosti (391 mg betalainov/kg vzorca). Najvišjo vsebnost betalainov smo izmerili v ekstraktu po Soxhlet ekstrakciji s topilom etanol-voda (2513 mg betalainov/kg vzorca).
Keywords:ekstrakcija, rastlinski materiali, konvencionalna topila, aktivne komponente, antioksidativna učinkovitost
Place of publishing:Maribor
Publisher:[P. Tržan]
Year of publishing:2018
PID:20.500.12556/DKUM-71497 New window
UDC:66.061.3(043.2)
COBISS.SI-ID:21982230 New window
NUK URN:URN:SI:UM:DK:TF7Q6O6C
Publication date in DKUM:05.10.2018
Views:1638
Downloads:156
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FKKT
:
TRŽAN, Primož, 2018, Vpliv ekstrakcijskega postopka na kvaliteto ekstraktov iz liofiliziranih hrušk  (pyrus communis) [online]. Bachelor’s thesis. Maribor : P. Tržan. [Accessed 13 April 2025]. Retrieved from: https://dk.um.si/IzpisGradiva.php?lang=eng&id=71497
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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:19.08.2018

Secondary language

Language:English
Title:Effect of extraction process on the quality of extracts from liofilizied pears (pyrus communis)
Abstract:Several extraction techniques have been applied for extraction of target compounds from natural material. The main purpose of our work was to determine the extraction technique and the choice of a conventional solvent which gives the best extraction efficiency and does not lead to degradation of biologically active components. In the extract from lyophilized pears has been determined the content of sugar. In the extracts, attained by Soxhlet, cold and ultrasonic extraction antioxidant activity, total carbohydrates, proteins and betalaine have been determined using different solvents; methanol, ethanol and ethanol-water. It has been concluded that the maximum extraction efficiency gives cold extraction with solvent methanol (47,78 %). In this extract we also measured the highest content of total carbohydrates (431 g carbohydrates/kg of sample). The highest antioxidant activity was measured in extract, obtained by cold extraction with ethanol (2,27 %), although the extraction efficiency was low (11,24 %). Higher efficiencies were determined when using methanol as a solvent independently from method. In extracts, attained after Soxhlet extraction, we determined the maximum protein content (474 g proteins/kg of sample) and at the same time the lowest contents of betalain (391 mg betalains/kg of sample). The highest proportion of betalains was measured in the extract attained by Soxhlet extraction using ethanol-water (2513 mg betalains/kg of sample)-
Keywords:extraction, plant materials, conventional solvents, active components, antioxidant activity


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