Određivanje boje tikve sušene u vakuumu

undergraduate thesis

• Title (english): Colour determination of vacuum dried gourd
• Author: Anamarija Lončar
• Mentor: Mladen Brnčić (mentor)
• Granter: University of Zagreb; Faculty of Food Technology and Biotechnology; (Department of Process Engineering); (Laboratory of Thermodynamics); Zagreb
• Defense date and country: 2017-09-18, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Biotechnology

Abstract

Cilj ovog završnog rada bio je pronaći optimalne i najekonomičnije uvjete sušenja tikve u vakuumu pri kojima su efektivnost sušenja i boja takvi da zadovolje potražnju potrošača. Provedeni su eksperimenti pri procesnim parametrima od 30°C i 30 mbar, 40°C i 30 mbar, 50°C i 50 mbar u trajanju od 2, 3 i 4 sata te eksperimenti pri procesnim parametrima od 50°C i 30 mbar u trajanju od 1, 2, 3 i 4 sata. Pri svakom procesnom parametru praćeni su ukupni gubitak vode, ekonomičnost i promjena boje pomoću parametara L*, a*, b*, c*, h, ΔE* i indeksa smeđenja. Nakon provedenih eksperimenata, zaključeno je da su optimalni parametri sušenja s obzirom na efektivnost, ekonomičnost i očuvanje boje oni pri 50°C i 30 mbar u trajanju od jednog sata.

Abstract (english)

Aim of this thesis is to find optimal and the most economical conditions during vacuum drying of gourd that will satisfy consumers in terms of effective drying and colour preservation. Experiments were performed at 30°C & 30 mbar, 40°C & 30 mbar, 50°C & 50 mbar during 2, 3 and 4 hours and at 50°C & 30 mbar during 1, 2, 3 and 4 hours. Parameters that were determined during each experiment were water loss, economical consumption and colour parameters (L*, a*, b*, c*, h, ΔE* and browning index). Results of performed experiments showed that in terms of effective drying, economical consumption and colour preservation optimal drying conditions were at 50°C & 30 mbar during 1 hour.

• Keywords: boja; karotenoidi; pigment; sušenje u vakuumu; tikva
• Keywords (english): carotenoids; colour; gourd; pigment; vacuum drying
• Language: croatian
• URN:NBN: urn:nbn:hr:159:556537
• 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: 2017-09-19 12:16:43