Title Analiza antioksidansa drijena, Cornus mas L.
Title (english) Analysis of Cornus mas antioxidants
Author Marin Lolić
Mentor Sandra Kraljević Pavelić (mentor)
Committee member Mirela Sedić (predsjednik povjerenstva)
Granter University of Rijeka (Faculty of Biotechnology and Drug Development) Rijeka
Defense date and country 2020-09-14, Croatia
Scientific / art field, discipline and subdiscipline BIOTECHNICAL SCIENCES Biotechnology Biology
Abstract Dobro je poznato da biljni fenoli imaju širok raspon pozitivnog djelovanja, ali je manje poznato da su plodovi i lišće hrvatskih drijenova bogati fenolnim spojevima. Određena istraživanja su već pokazala da ekstrakti plodova i ostalih biljnih dijelova drijena imaju snažno antioksidativno, kardioprotektivno, neuroprotektivno i antikancerogeno djelovanje. Zbog toga je cilj ovog rada analizirati plodove, lišće i pulpu drijena te prehrambene prerađevine od drijena poput džemova i sirupa kao pogodnih izvora polifenola za svakodnevnu primjenu.
Uzorci drijena i njegovih prerađevina su prikupljeni sa šireg područja grada Rijeke i u Primorsko-goranskoj županiji. Ekstrakcija biljnih fenola iz biljnih uzoraka drijena i njegovih prerađevina se odvila u otopini metanola. Za određivanje ukupnog udjela fenola korišten je Folin-Ciocalteu test, dok je za određivanje antioksidacijske aktivnosti primijenjena DPPH (2,2-difenil-1-pikrilhidrazil) metoda. Količina fenolnih spojeva i antioksidacijska aktivnost je najveća u uzorcima lišća, dok je ukupni fenolni sastav i antioksidacijska aktivnost najmanja u prehrambenim prerađevinama od drijena.
Razlike u rezultatima između pojedinih uzoraka se mogu pripisati razini zrelosti plodova i lišća, geografskom položaju nasada drijena, vremenu prikupljanja uzoraka i sl.
Analiza polifenolnog sadržaja metanolnog ekstrakta plodova drijena provedena je na spregnutom masenom spektrometru s hibridnom analizatorom (LC-Q-TOF). Usporedbom spektara sa bazama podataka identificirani su tri antocijana (cijanidin 3-glukozid, delfinidin 3-galaktozid i cijanidin 3-O-rutinozid), dva antocijanidina (pelargonidin i cijanidin) i pet fenolnih kiselina (vinska kiselina, jabučna kiselina, kvininska kiselina, galna kiselina i klorogena kiselina).
Ovim radom su dobiveni prvi podaci o ukupnom fenolnom sastavu hrvatskih drijenova te kvantitativni sastav antocijanidina i fenolnih kiselina.
Abstract (english) It is well known that the plant phenols have a wide range of positive effects, but it is less known that fruits and leaves of Croatian cornelian cherry are rich in phenolic compounds. Certain studies have already proven strong antioxidant, cardioprotective, neuroprotective and anticancer effects of cornelian cherry fruits and other plant parts extracts. Therefore, the aim of this paper was to analyse fruits, leaves and pulp of the Croatian cornelian cherry and food products from cornelian cherry such as jams and syrups as suitable sources of polyphenols for everyday use.
Samples of dogwood and its products were collected from the wider area of the city of Rijeka and on the area of the Primorsko-goranska County. Extraction of the plant phenols dogwood samples and corresponding products were done by use of methanol solution. The Folin-Ciocalteu test was used to determine the total phenol content, while antioxidant activity was evaluated by the DPPH (2,2-diphenyl-1-picrylhydrazyl) method. The amount of phenolic compounds and antioxidant activity was highest in leaf samples, while the total phenolic composition and antioxidant activity was lowest in the cornelian cherry food products. Differences in the results between individual samples can be attributed to the level of fruit and leaf maturity, geographical location of cornelian cherry plantations and time of sample collection.
Analysis of the cornelian cherry fruit methanol extracts polyphenolic content was performed by use of a coupled mass spectrometer with a hybrid analyzer (LC-Q-TOF). By comparison of the obtained spectra with the databases, three anthocyanins (cyanidin 3-glucoside, delfinidine 3-galactoside and cyanidin 3-O-rutinoside), two anthocyanidins (pelargonidine and cyanidin) and five phenolic acids (tartaric acid, malic acid, quinic acid, gallic acid and chlorogenic acid) were identified.
This paper provides data on the Croatian cornelian cherry total phenolic composition and the corresponding quantitative composition of anthocyanidins and phenolic acids.
Keywords
Cornus mas L.
Folin-Ciocalteu test
DPPH metoda
MS-LC-Q-TOF
fenolni sastav
Keywords (english)
Cornus mas L.
Folin-Ciocalteu test
DPPH method
MS-LC-Q-TOF
phenolic composition
Language croatian
URN:NBN urn:nbn:hr:193:966774
Study programme Title: Drug research and development Study programme type: university Study level: graduate Academic / professional title: magistar/magistra istraživanja i razvoja lijekova (magistar/magistra istraživanja i razvoja lijekova)
Type of resource Text
File origin Born digital
Access conditions Access restricted to students and staff of home institution
Terms of use
Repository Repository of the University of Rijeka, Faculty of Biotechnology and Drug Development
Created on 2020-09-16 20:24:23