Sadržaj kalcija u cvjetači na tržištu grada Zagreba

master's thesis

• Title (english): Calcium content of cauliflower at Zagreb selling places
• Author: Paula Stupar
• Mentor: Marko Petek (mentor)
• Committee member: Marko Petek (predsjednik povjerenstva)
• Committee member: Tomislav Karažija (član povjerenstva)
• Committee member: Božidar Benko (član povjerenstva)
• Granter: University of Zagreb; Faculty of Agriculture; (Department of Plant Nutrition); Zagreb
• Defense date and country: 2019-09-24, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Agronomy

Abstract

Cvjetača predstavlja odličnu dijetetsku namirnicu koja je na tržištu prisutna tijekom gotovo cijele godine. Kalcij je makroelement koji izgrađuje staničnu membranu, stabilizira pektin središnje lamele i na taj način smanjuje bubrenje i pucanje plodova. Potrošači nemaju mogućnost uvida u stvarni mineralni sastav povrća prilikom kupnje te je provedeno istraživanje s ciljem utvrđivanja količine kalcija u cvjetači kao i usporedba rezultata obzirom na mjesto kupnje. Uzorkovanje je provedeno u 3 trgovačka lanca, 3 prodavaonice ekološkim proizvodima i 3 tržnice na području grada Zagreba. Kalcij je nakon digestije s koncentriranom HNO3 i HClO4 određen atomskom apsorpcijskom spektrometrijom. Količina kalcija u suhoj tvari cvjetače bila je u rasponu od 0,26 do 0,30 % Ca ST, dok je količina u svježoj tvari cvjetače iznosila između 37,23 do 45,5 mg Ca/100 g svježe tvari. Konzumacijom 100 g cvjetače iz trgovačkih lanaca može se podmiriti 4,6 % dnevnih potreba za kalcijem kod odraslih osoba, a konzumacijom cvjetače s tržnica te iz trgovina ekološkim proizvodima 5 ,7 % .

Abstract (english)

Cauliflower is na excellent dietary food that is on the market almost all year. Calcium is an macroelement that is part of the cell membrane, stabilizes the pectin of the central lamina and reduces fruit swelling and bursting. Consumers don't have the opportunity to see the actual mineral composition of the vegetables when buy, so the study was conducted to determine the content of calcium in the cauliflower as well to compare the results in view of place of purchase. The sampling was carried out in 3 retail chains, 3 organic products stores and 3 markets in Zagreb. After digestion with concentrated HNO3 and HClO4, calcium was determined by atomic absorption spectrometry. The content of calcium in the dry weight of cauliflower ranged from 0.26 to 0.30% Ca DW. The content of calcium in the fresh weight of cauliflower ranged from 37.23 to 45.5 mg Ca/100 g fresh weight. Consumption of 100 g of cauliflower from retail chains can cover 4.6% of daily calcium requirements for adults, 5.7% of cauliflower consumption from market places and from organic products stores.

• Keywords: kupusnjače; makroelement; mineral; povrće; prodajna mjesta
• Keywords (english): brassicas; macroelement; mineral; vegetables; selling places
• Language: croatian
• URN:NBN: urn:nbn:hr:204:374716
• Study programme: Title: Agroecology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/ magistra inženjer/inženjerka agroekologija (magistar/ magistra inženjer/inženjerka agroekologija)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Access restricted to students and staff of home institution
• Created on: 2019-11-15 07:41:22