Bioaktiivsed ained vaarika viljades
Laen...
Kuupäev
2015
Kättesaadavus
Autorid
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
Uurimistöö eesmärgiks on kirjanduse ja erinevate uurimustööde põhjal võrrelda erinevate
sortide ja säilitusviiside mõju vaarika viljades leiduvate olulisemate bioaktiivsete ühendite:
askorbiinhape, antotsüaanide ja ellagitanniinide sisaldusele. Töö hüpotees on: bioaktiivsete
ühendite sisaldust vaarika viljades mõjutavad sordiomadused ja säilitusviis.
Uurimistöö kirjanduslik ülevaade annab ülevaate vaarika botaanilisest kuuluvusest ja
bioloogilistest iseärasustest, vaarika biokeemilisest sisaldusest ning bioaktiivsetest ainetest
vaarika viljades. Kirjanduse ülevaatest selgus, et vaarikas on kõige olulisematest
bioaktiivseteks aineteks askorbiinhape, antotsüaanid ning ellagitanniinid ja elaaghape.
Materjali ja metoodika osas kirjeldab uurimustöid, kus uuriti askorbiinhappe,
antotsüaanide, ellagitanniinide ja elaaghappe sisaldust vaarika viljades ning nende
külmutamise ja säilitamise mõju neile. Materjali ja metoodika osa koostamiseks kasutati ISI
WEB OF KNOWLEDGE andmebaasi, valiti avaldamise aastateks 2000-2015 ning otsingu
märksõnad: raspberry cultivars and anthocyanins; raspberry cultivars and ellagitannins;
raspberry cultivars and ascorbic acid; effect of freezing and storage on anthocyanins,
ellagitannins and ascorbic acid. Materjali ja metoodika osa koostamiseks valiti välja 12
teadusartiklit. Uurimustöö tulemustest ja analüüsist selgus, et askorbiinhappe, antotsüaanide
ning ellagitanniinide ja elaaghappe sisaldust ning külmutamist ja säilitamist mõjutab eelkõige
vaarika sort. Vaarika viljade viljumisajal ja viljade värvil on bioaktiivsete ainete sisaldusele
väiksem, kuid olenevalt sordist individuaalne mõju.
The aim of this bachelor thesis was to compare the effect of raspberry cultivars and different storage techniques to the major bioactive compounds in raspberry fruit: ascorbic acid, anthocyanins, ellagitannins and ellagic acid based on literature and research articles. The hypothesis of the bachelor thesis was that the bioactive content of raspberry fruit is affected by different cultivar characteristics and conservation techniques. The literature part of the thesis gives an overview of raspberries botanical affiliation, biological characterization content of biochemicals and bioactive compounds in raspberries. In the literature overview the fact that ascorbic acid, anthocyanins, ellagitannins and ellagic acid are the most important bioactive compounds in raspberries is stated. The material and method part of the thesis describes research articles where the same bioactive compunds and the effect of freezing and storaged were analysed. ISI WEB OF KNOWLEDGE database was used for reasearching articles from years 2000-2015 searched keywords were: raspberry cultivars and anthocyanins; raspberry cultivars and ellagitannins; raspberry cultivars and ascorbic acid; effect of freezing and storage on anthocyanins, ellagitannins and ascorbic acid and 12 appropriate research articles were chosen. From the result of the research and analysis it can be stated that ascorbic acid, anthocyanins, ellagitannins and ellagic acid contentand ellagic acids content and the effect of freezing and storage of those bioactive compounds in raspberries is influenced mainly by raspberry cultivar. The time of fruiting and the colour of raspberry fruits has a smaller but individual effect (depending on the cultivar) to the bioactive content of raspberries.
The aim of this bachelor thesis was to compare the effect of raspberry cultivars and different storage techniques to the major bioactive compounds in raspberry fruit: ascorbic acid, anthocyanins, ellagitannins and ellagic acid based on literature and research articles. The hypothesis of the bachelor thesis was that the bioactive content of raspberry fruit is affected by different cultivar characteristics and conservation techniques. The literature part of the thesis gives an overview of raspberries botanical affiliation, biological characterization content of biochemicals and bioactive compounds in raspberries. In the literature overview the fact that ascorbic acid, anthocyanins, ellagitannins and ellagic acid are the most important bioactive compounds in raspberries is stated. The material and method part of the thesis describes research articles where the same bioactive compunds and the effect of freezing and storaged were analysed. ISI WEB OF KNOWLEDGE database was used for reasearching articles from years 2000-2015 searched keywords were: raspberry cultivars and anthocyanins; raspberry cultivars and ellagitannins; raspberry cultivars and ascorbic acid; effect of freezing and storage on anthocyanins, ellagitannins and ascorbic acid and 12 appropriate research articles were chosen. From the result of the research and analysis it can be stated that ascorbic acid, anthocyanins, ellagitannins and ellagic acid contentand ellagic acids content and the effect of freezing and storage of those bioactive compounds in raspberries is influenced mainly by raspberry cultivar. The time of fruiting and the colour of raspberry fruits has a smaller but individual effect (depending on the cultivar) to the bioactive content of raspberries.
Kirjeldus
Märksõnad
bioaktiivsed ained, vaarikas, bakalaureusetööd