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Basic chemical characteristics of juices of selected red gooseberry varieties
Klatová, Kamila ; Vítová, Eva (referee) ; Vespalcová, Milena (advisor)
This thesis deals with the determination of selected chemical properties red fruit varieties of gooseberries. The theoretical part described the basic biological characteristics of gooseberry, some diseases, pests, and varieties red fruit gooseberries. Furthermore, the work focused on the active substances contained in the fruits of gooseberry with characteristics of the individual substances and the use of gooseberry fruit in the food industry. It was described the principle of individual determination methods of selected parameters gooseberry juice: determination of total and soluble solids, pH, titratable acidity, formol number and determination of reducing carbohydrates. The experimental part of the procedures described basic methods used for the determination of selected chemical characteristics gooseberry fruits and compared with each other. The total solids content ranged from 9,96 to 21,80 wt.%, soluble solids then from 9,80 to 15,19 wt.%, titratable acidity in the range from 261,87 to 410,99 mmol H kg-1, formol number in the range from 6,11 to 38,45 cm3 0.1 mol • dm-3 NaOH per 100 g, amount of reducing carbohydrates was determined at 6,27 to 10,87 wt.%.
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Basic chemical characteristics of juices of selected red gooseberry varieties
Klatová, Kamila ; Vítová, Eva (referee) ; Vespalcová, Milena (advisor)
This thesis deals with the determination of selected chemical properties red fruit varieties of gooseberries. The theoretical part described the basic biological characteristics of gooseberry, some diseases, pests, and varieties red fruit gooseberries. Furthermore, the work focused on the active substances contained in the fruits of gooseberry with characteristics of the individual substances and the use of gooseberry fruit in the food industry. It was described the principle of individual determination methods of selected parameters gooseberry juice: determination of total and soluble solids, pH, titratable acidity, formol number and determination of reducing carbohydrates. The experimental part of the procedures described basic methods used for the determination of selected chemical characteristics gooseberry fruits and compared with each other. The total solids content ranged from 9,96 to 21,80 wt.%, soluble solids then from 9,80 to 15,19 wt.%, titratable acidity in the range from 261,87 to 410,99 mmol H kg-1, formol number in the range from 6,11 to 38,45 cm3 0.1 mol • dm-3 NaOH per 100 g, amount of reducing carbohydrates was determined at 6,27 to 10,87 wt.%.
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