Utjecaj načina sušenja na kvalitativna svojstva cvjetova krizantema te energetsku iskoristivost stabljike i listova

master's thesis

• Title (english): The influence of drying metode's on the qualitativ properties of chrysanthemums flower petals and the energy utilization of the stem and leaves
• Author: Tea Accad
• Mentor: Ana Matin (mentor)
• Committee member: Ana Matin (predsjednik povjerenstva)
• Committee member: Vanja Jurišić (član povjerenstva)
• Committee member: Vesna Židovec (član povjerenstva)
• Granter: University of Zagreb; Faculty of Agriculture; (Sustainable Technologies and Renewable Energy Sources); Zagreb
• Defense date and country: 2024-09-25, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Agronomy

Abstract

Krizanteme su jedna od omiljenih cvjetnih vrsta za rez zbog svojeg oblika i raznih boja cvjetne glavice, zeljaste su trajnice koje spadaju pod rod (Asteraceae). Smatraju se kraljicom jeseni, krizanteme su tradicionalna cvjetna vrsta za ukrašavanje groblja u Hrvatskoj i vrlo dekorativna vrsta tijekom jesenskih dana. Za potrebe ovog istraživanja korištene su kultivari krizanteme bijele, žute i ljubičaste boje. Utvrdio se utjecaj temperatura i način sušenja na kvalitativna svojstva cvjetova krizantema. Provedena je termička dorada sušenjem pri podtlaku na temperaturi od 50°C, 60°C, 70°C te konvencijskim sušenjem u dehidratoru na temperaturama od 50°C, 60°C i 70°C do vlažnosti od 12 %. Iz dobivenih rezultata odredila se brzina otpuštanja vode iz cvjetova, udio pepela i koksa u svježim i suhim uzorcima stabljike i lista krizanteme, promjene boje cvjetova prije i nakon sušenja, prosječna ogrjevna vrijednost lista i stabljike te udio proteina u cvjetovima.

Abstract (english)

Chrysanthemums are one of the most populare cut flowers because of their shape and various colors of their flower heads, they are herbaceouse perennials that belong to the genus (Asteraceae). Considered the queen of autumn, chrysanthemums are traditional flower for decorating cemeteries in Croatia and are a very decorative species during autumn days. White, yellow and purpul chrysanthemum cultivars were used for the purposes of this research. The influence of temperature and drying methods on the qualitative propertis of chrysanthemum flowers was determined. Thermal finishing was carried out by suppressed drying at temperatures of 50 °C, 60 °C and 70 °C and convection drying with the help of a dehydrator at temperatures of 50 °C, 60 °C, 70 °C to a humidity of 12 %. From the obtained results, the rate of water release from the flowers, the proportional of ash and coke in fresh and dry samples of chrysanthemum stems and leaves, color changes of the flowers before and after drying, the average calorific value of the leaves and stems, and the proportion of protein in the flowers were determined.

• Keywords: krizantema; sušenje; kvalitativna svojstva; temperatura
• Keywords (english): chrysanthemum; drying; qualitativ properties; temperatur
• Language: croatian
• URN:NBN: urn:nbn:hr:204:615404
• Study programme: Title: Horticulture; Study programme type: university; Study level: graduate; Academic / professional title: magistar/ magistra inženjer/inženjerka hortikulture (magistar/ magistra inženjer/inženjerka hortikulture)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2024-10-24 10:10:03