| | SLO | ENG | Cookies and privacy

Bigger font | Smaller font

Show document

Title:SEPARACIJA BIOAKTIVNIH KOMPONENT IZ BRUSNIC
Authors:Peklar, Mojca (Author)
Škerget, Mojca (Mentor) More about this mentor... New window
Knez, Željko (Co-mentor)
Files:.pdf UNI_Peklar_Mojca_2009.pdf (6,10 MB)
MD5: B87111C648E5D6952AF71C413A755376
 
Language:Slovenian
Work type:Undergraduate thesis (m5)
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:S pomočjo konvencionalne ekstrakcije in superkritične ekstrakcije s CO2 posušenih plodov brusnic smo pripravili ekstrakte v katerih smo določili vsebnost nekaterih fenolnih spojin. Pri konvencionalni ekstrakciji smo kot topilo uporabili 60 % raztopino acetona in 35 % raztopino etanola. Ekstrakcije smo izvajali pri temperaturi 22 °C in pri temperaturi 40 °C v dveh stopnjah. V pripravljenih ekstraktih smo določali koncentracije celokupnih monomernih antocianinov, celokupnih fenolov, celokupnih flavonoidov, proantocianidinov in taninov s spektrofotometričnimi metodami. Merili smo jim absorbanco pri različnih valovnih dolžinah in na podlagi dobljenih umeritvenih krivulj izračunali koncentracije. Rezultate smo podali na gram ekstrakta in na gram materiala. Prav tako smo spremljali kinetiko ekstrakcije, tako da smo med postopkom ekstrakcije jemali vzorce v različnih časovnih intervalih in spremljali spreminjanje koncentracije v odvisnosti od časa.
Keywords:Konvencionalna ekstrakcija, superkritična ekstrakcija s CO2, brusnica, celokupni fenoli, celokupni flavonoidi, celokupni antocianini, tanini, proantocianidini, kinetika ekstrakcije
Year of publishing:2009
Publisher:[M. Peklar]
Source:Maribor
UDC:66.061.34:547.568(043.2)
COBISS_ID:13440022 New window
NUK URN:URN:SI:UM:DK:SXAYGCT9
Views:3296
Downloads:419
Metadata:XML RDF-CHPDL DC-XML DC-RDF
Categories:KTFMB - FKKT
:
  
Average score:(0 votes)
Your score:Voting is allowed only for logged in users.
Share:AddThis
AddThis uses cookies that require your consent. Edit consent...

Hover the mouse pointer over a document title to show the abstract or click on the title to get all document metadata.

Secondary language

Language:English
Title:SEPARATION OF BIOACTIVE COMPOUNDS FROM CRANBERRIES
Abstract:Dried cranberries were extracted and obtained extracts were analyzed on the content of phenolic compounds. Conventional extraction with organic solvents and supercritical extraction with CO2 were applied. For conventional extraction 60 % solution of acetone and 35 % solution of ethanol were used. Extractions were performed at temperature 22°C and at temperature 40 °C in two steps. Concentrations of total monomeric anthocyanins, total phenols, total flavonoids, proanthocyanidins and tanins were determined in prepared extracts by spectrophotometric methods. The absorbances at different wavelengths were measured and according to calibration curves concentrations were calculated. Results were expressed per gram of extract and per gram of material. The kinetics of extractions was followed, so that the samples were taken at different time intervals during the process of extraction and variation of concentration with time was monitored.
Keywords:Conventional extraction, supercritical extraction with CO2, cranberry, total phenols, total flavonoids, total anthocianins, tanins, proanthocianins, kinetics of extraction


Comments

Leave comment

You have to log in to leave a comment.

Comments (0)
0 - 0 / 0
 
There are no comments!

Back
Logos of partners University of Maribor University of Ljubljana University of Primorska University of Nova Gorica