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Bioactive substances contained in elderberry pomace
Šimšová, Veronika ; Diviš, Pavel (referee) ; Vespalcová, Milena (advisor)
This bachelor thesis deals with the determination of selected chemical characteristics in the elderberry juice, compote and in the extracts of elderberry marc. The theoretical part describes the botanical characteristics of elderberry (Sambucus nigra L.) including its occurrence, the possibility of utilization of individual parts of the plant in the food industry and in the healing therapies and chemical composition of the berries. The biggest attention is given to the bioactive compounds contained in these fruits. The second chapter deals with the dry matter and the methods of its determination. The last chapter of the theoretical part describes vitamin C, its importance for the human organism and manual methods for determination of vitamin C. Among the selected chemical characteristics, set out in the experimental part, was the determination of reducing sugars by gravimetric method and Berthrand method, titratable acids, total anthocyanins by pH-differential method, total phenolic compounds by the Folin-Ciocalteu method and determination of the dry matter by drying and refractometric method. Analyzes have proven that extracts made of elderberry marc under suitable conditions have, in most cases, chemical characteristics comparable to the elderberry juice and compote. However, extracts are much better source of anthocyanic and phenolic compounds than juice and compote.
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Bioactive substances contained in elderberry pomace
Šimšová, Veronika ; Diviš, Pavel (referee) ; Vespalcová, Milena (advisor)
This bachelor thesis deals with the determination of selected chemical characteristics in the elderberry juice, compote and in the extracts of elderberry marc. The theoretical part describes the botanical characteristics of elderberry (Sambucus nigra L.) including its occurrence, the possibility of utilization of individual parts of the plant in the food industry and in the healing therapies and chemical composition of the berries. The biggest attention is given to the bioactive compounds contained in these fruits. The second chapter deals with the dry matter and the methods of its determination. The last chapter of the theoretical part describes vitamin C, its importance for the human organism and manual methods for determination of vitamin C. Among the selected chemical characteristics, set out in the experimental part, was the determination of reducing sugars by gravimetric method and Berthrand method, titratable acids, total anthocyanins by pH-differential method, total phenolic compounds by the Folin-Ciocalteu method and determination of the dry matter by drying and refractometric method. Analyzes have proven that extracts made of elderberry marc under suitable conditions have, in most cases, chemical characteristics comparable to the elderberry juice and compote. However, extracts are much better source of anthocyanic and phenolic compounds than juice and compote.
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