Ekstrakcija polifenola iz šparoga (Asparagus officinalis) potpomognuta mikrovalovima

undergraduate thesis

• Title (english): Microwave assisted extraction of polyphenols from aspargus (Asparagus officinalis)
• Author: Ema Svetličić
• Mentor: Marijana Jukić (mentor)
• Granter: University of Zagreb; Faculty of Food Technology and Biotechnology; (Department of Chemistry and Biochemistry); (Laboratory for Physical Chemistry and Corrosion); Zagreb
• Defense date and country: 2016-09-20, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Biotechnology

Abstract

U ovom radu je ispitan utjecaj ekstrakcije aktivirane mikrovalovima na sastav i koncentraciju polifenolnih spojeva iz uzorka šparoga različitog geografskog podrijetla. Ispitan je utjecaj vremena ekstrakcije, vrste otapala te temperature na efikasnost ekstrakcije. Koncentracija ukupnih fenolnih spojeva određena je Folin-Ciocalteu metodom. Provedena je ekstrakcija u 40%, 60% i 80%- tnoj otopini etanola pri temepraturi od 50°C i 65°C te u vremenskom periodu od 10 i 15 min. Najbolji ekstrakcijski kapacitet se postiže primjenom 80% vodene otopine etanola pri 50°C u vremenu od 15 min.

Abstract (english)

This study describes the impact of microwave assisted extraction on composition and concentra-tion of polyphenols from asparagus samples originated from different geographical area. The ef-fects of extraction time, solvent and temperature on the extraction efficiency was tested. The concentration of total phenolic compounds was determined by the Folin-Ciocalteu method. Ex-traction was conducted in a 40%, 60% and 80% aqueous ethanol at a temperature of 50 ° C and 65 ° C and in a time period of 10 and 15 min. Best extraction capacity is achieved by using 80% aqueous ethanol at 50 ° C for 15 min.

• Keywords: šparoga; polifenoli; mikrovalna ekstrakcija; zelena kemija; antioksidansi
• Keywords (english): asparagus; polyphenols; microwave extraction; green chemistry; antioxidants
• Language: croatian
• URN:NBN: urn:nbn:hr:159:703937
• Study programme: Title: Biotechnology; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka biotehnologije (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka biotehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2017-04-24 10:11:33