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Naslov:Antioxidant and antimicrobial activity of guarana seed extracts
Avtorji:ID Majhenič, Lucija (Avtor)
ID Škerget, Mojca (Avtor)
ID Knez, Željko (Avtor)
Datoteke:URL http://dx.doi.org/10.1016/j.foodchem.2007.01.074
 
Jezik:Angleški jezik
Vrsta gradiva:Neznano
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FKKT - Fakulteta za kemijo in kemijsko tehnologijo
Opis:The antioxidant and antibacterial activities of guarana (Paullinia cupana) seed extracts were determined. The seeds were extracted with water, methanol, 35% acetone and 60% ethanol at room (TR) and at boiling (TB) temperature of solvent.Extracts were analyzed for the contents of caffeine and catechins, epicatechin (EC), catechin (C) and epicatechin gallate (ECG), by high performance liquid chromatography (HPLC). The contents of total phenols (according to the Folin-Ciocalteu procedure) and proanthocyanidins were analysed by UV spectrophotometry. The guarana seed water extract obtained at room temperature contained higher amounts of caffeine and catechins than did alcoholic guarana seed extracts. The antioxidant and radical-scavenging activities of guarana seed extracts were evaluated using the ß-carotene-linoleic acid emulsion system and the stable free radical 2,2-diphenyl-1-picrylhydrazyl (DPPH ). All tested guarana seed extracts displayed strong antioxidant and radical-scavenging properties. The guarana seed extracts were tested against three food-borne fungi: Aspergillus niger, Trichoderma viride and Penicillium cyclopium, and three health-damaging bacteria: Escherichia coli, Pseudomonas fluorescens and Bacillus cereus by theagar well diffusion and broth dilution assay. The alcoholic guarana seed extracts displayed stronger antimicrobial activity against all tested microorganisms than did water extracts. Results presented here may suggest that seed extracts of guarana possess strong antimicrobial and antioxidant properties, and they can therefore be used as a natural additive in food, cosmetic and pharmaceutical industries.
Ključne besede:chemical processing, guarana extract, Paullinia cupana, seed extracts, antimicrobial properties, antioxidative properties
Leto izida:2007
PID:20.500.12556/DKUM-25934 Novo okno
UDK:66.061
COBISS.SI-ID:11421206 Novo okno
ISSN pri članku:0308-8146
NUK URN:URN:SI:UM:DK:2KTFL5I9
Datum objave v DKUM:31.05.2012
Število ogledov:2216
Število prenosov:122
Metapodatki:XML DC-XML DC-RDF
Področja:Ostalo
:
MAJHENIČ, Lucija, ŠKERGET, Mojca in KNEZ, Željko, 2007, Antioxidant and antimicrobial activity of guarana seed extracts. Food chemistry [na spletu]. 2007. [Dostopano 3 april 2025]. Pridobljeno s: http://dx.doi.org/10.1016/j.foodchem.2007.01.074
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Gradivo je del revije

Naslov:Food chemistry
Skrajšan naslov:Food chem.
Založnik:Applied Science Publishers
ISSN:0308-8146
COBISS.SI-ID:6385415 Novo okno

Sekundarni jezik

Jezik:Angleški jezik
Ključne besede:kemijska procesna tehnika, guarana ekstrakt, Paullinia cupana, izvlečki semen, antimikrobne lastnosti, antioksidativne lastnosti


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