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Title:KINETIKA SPROŠČANJA KURKUMINA IZ RAZLIČNIH TRDNIH FORMULACIJ
Authors:ID Rebernišek, Maja (Author)
ID Škerget, Mojca (Mentor) More about this mentor... New window
ID Knez, Željko (Comentor)
Files:.pdf UN_Rebernisek_Maja_2015.pdf (1,32 MB)
MD5: A22250F9EED6625574E463B839BC2A1D
 
Language:Slovenian
Work type:Bachelor thesis/paper
Typology:2.11 - Undergraduate Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:V diplomski nalogi smo iskali primerne nosilce za vezavo kurkumina. Raziskovali smo sproščanje aktivne substance kurkumina iz različnih trdnih formulacij. Sproščanje smo študirali v mediju pH želodca in mediju pH debelega črevesa v različnih časovnih intervalih. Ker ima kurkumin največjo biološko aktivnost v debelem črevesu, smo iskali tak nosilec, ki bi se minimalno sproščal v želodcu, popolnoma ali vsaj v veliki večini pa bi se sprostil v debelem črevesu. Ugotovili smo, da tristearat ni primeren nosilec za vezavo kurkumina, saj ni prišlo do sproščanja substance. Z vezavo kurkumina na PEG različnih molskih mas smo dobili primeren nosilec. Kurkumin se je popolnoma sprostil tako v mediju pH želodca kakor tudi v mediju pH debelega črevesa. Prišli smo do ugotovitve, da se hitrost sproščanja aktivne substance z naraščajočo verigo PEG zmanjšuje. Ugotovili smo, da nanoenkapsulacija kurkumina ni primerna metoda, saj ne pride do sproščanja substance v želodcu. V debelem črevesu pa je sproščanje minimalno. S koprecipitacijo smo kurkumin vezali na ciklodekstrin. Ta metoda je bila uspešna, saj se je vsa učinkovina sprostila v želodcu. Daleč največjo antioksidativno aktivnost smo dobili pri vzorcu nanoenkapsulacije.
Keywords:kurkumin, mikronizacija, sproščanje, DPPH
Place of publishing:Maribor
Publisher:[M. Rebernišek]
Year of publishing:2015
PID:20.500.12556/DKUM-54108 New window
UDC:544.163.3:547.979.4(043.2)
COBISS.SI-ID:19431446 New window
NUK URN:URN:SI:UM:DK:NOSZW2OO
Publication date in DKUM:30.10.2015
Views:1599
Downloads:192
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FKKT
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Secondary language

Language:English
Title:KINETICS OF CURCUMIN RELEASE FROM VARIOUS SOLID FORMULATIONS
Abstract:The diploma paper is based on searching for appropriate carriers for binding of curcumin. We studied the release of the active substance of curcumin from different solid formulations. The release was studied in the medium gastric pH and the medium pH of the colon in different periods. Since curcumin has its greatest biological activity in the colon, we were searching for a carrier, which would have a minimal release in the stomach, while it would release completely or mainly in the colon. We came to the conclusion that tristearate is not an appropriate carrier for binding with curcumin, since there was no substance release. The binding of curcumin on the PEG of different molecular mass brought us to the appropriate carrier. Curcumin was completely released in the medium gastric pH as well as in the medium pH of colon. We came to the conclusion that the release rate of the active substance decreases with the increased PEG-chain. We discovered that the nanoencapsulation of curcumin is not an appropriate method, since there is no substance release in the stomach, while there is a minimum release in the colon. Via coprecipitation we managed to bind curcumin to cyclodextrin. This method was effective since the whole agent was released in the stomach. By far the largest anti-oxidative activity was observed with the nanoencapsulation sample.
Keywords:curcumin, micronisation, release, DPPH


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