| | SLO | ENG | Cookies and privacy

Bigger font | Smaller font

Show document

Title:EKSTRAKCIJA BETALAINOV IZ PLODOV RDEČE PESE IN SADEŽEV KAKTUSA OPUNCIJE
Authors:Čepin, Anja (Author)
Škerget, Mojca (Mentor) More about this mentor... New window
Knez, Željko (Co-mentor)
Files:.pdf VS_Cepin_Anja_2013.pdf (1,73 MB)
MD5: 0269702980DBA8639840505D3E448270
 
Language:Slovenian
Work type:Undergraduate thesis (m5)
Typology:2.11 - Undergraduate Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:Prehrambna in farmacevtska industrija vse bolj stremita k uporabi naravnih barvil, kot so betalaini, saj so v primerjavi s sinteznimi barvili neškodljiva, imajo celo pozitiven vpliv na človeški organizem. Betalaini so zelo raziskalni zaradi intenzivne barve in antioksidativnih lastnosti, ki zmanjšujejo nastanek raka in utrujenost. Znano je, da sta največji vir betalainov rdeča pesa Beta vulgaris in kaktus Opuntia ficus-Indica. V diplomski nalogi smo v plodovih rdeče pese in sadežih kaktusa določali vsebnost betalainov in fenolov s spektrofotometrično metodo. Preverili smo antioksidativno aktivnost ekstraktov s »Photochem-om«. Analize smo izvajali v ekstraktih sveže pese, liofilizirane (liof.) pese in liof. kaktusa. Liof. pesi in liof. kaktusu smo predhodno odstranili vodo s postopkom liofilizacije in stabilizirali vzorce. Sveža pesa vsebuje 85,7 % vode, kar smo določili s halogensko tehtnico. Ekstrakte smo pridobili s konvencionalno ekstrakcijo pri sobni temperaturi brez vpliva svetlobe, s pomočjo vode, acetona in etanola, ter z vodo, etanolom in acetonom z dodatkom stabilizatorja (0,01 % askorbinske kisline in 0,05 % citronske kisline). Ugotavljali smo vpliv svetlobe in dodatka kisline na izkoristek ekstrakcije in vsebnost in stabilnost betalainov.
Keywords:rdeča pesa, kaktus Opuntia ficus-indica, konvencionalna ekstrakcija, betalaini, celokupni fenoli, antioksidativnost
Year of publishing:2012
Publisher:[A. Čepin]
Source:Maribor
UDC:664.34(043.2)
COBISS_ID:16689430 New window
NUK URN:URN:SI:UM:DK:UCTISGJ9
Views:1858
Downloads:202
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:EXTRACTION OF BETALAINS FROM RED BEET AND CACTUS OPUNTIA PEARS
Abstract:Food and pharmaceutical industries are increasingly interested in the use of natural colorants such as betalains, because compared to the synthetic colorants they are not harmful and even have a positive effect to the human organism. Betalains are widely researched because of their intensive color and antioxidant properties, which reduce cancer risk and tiredness. It is well known that the most common sources of betalaines are red beetroot Beta vulgaris and cactus Opuntia ficus-Indica. In this diploma work we determined the content of betalains and phenols in red beet roots and in cactus fruits with spectrophotometric method. We examined antioxidant activity of extracts with Photochem. Analyses were carried out in fresh beet extracts, lyophilized beet and lyophilized cactus. lyophilized beet and lyophilized cactus were preliminary removed from water with the lyophilization process and the samples were stabilized. Extracts were obtained with conventional extraction at room temperature without influence of light, using water, acetone and ethanol as well as using water, ethanol and acetone with added stabilizer (0.01 % ascorbic acid and 0.05 % citric acid). We examined the influence of light and additions to the efficiency of extraction, content, and stability of betalaines.
Keywords:red beetroot, cactus Opuntia ficus-Indica, conventional extraction, betalains, total phenols, antioxidativity


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