Tag Archives: sugars

814-826 L. Shevchuk, Y. Tereshchenko, Y. Vintskovska, L. Levchuk, S. Babenko and R. Hrynyk
Yield and content of biologically active substances in blue honeysuckle fruit (Lonicera caerulea L.) grown in the Forest Steppe of Ukraine
Abstract |
Full text PDF (227 KB)

Yield and content of biologically active substances in blue honeysuckle fruit (Lonicera caerulea L.) grown in the Forest Steppe of Ukraine

L. Shevchuk¹²*, Y. Tereshchenko², Y. Vintskovska², L. Levchuk², S. Babenko² and R. Hrynyk²

¹National University of Life and Environmental Sciences of Ukraine, Agrobiological Faculty, 15 Heroes of Defense Str., UA03041 Kyiv, Ukraine
²Institute of Horticulture of the National Academy of Agrarian Sciences of Ukraine, 23 Sadova Str., UA03027 Kyiv, Ukraine
*Correspondence: zberig@ukr.net

Abstract:

The blue honeysuckle (Lonicera caerulea L.) is a relatively new crop in Ukraine, its industrial cultivation is only 100 hectares. The main constraints are the lack of varieties with high yield and nutritional value of berries. Therefore, a study of the yield and quality of introduced varieties is necessary and relevant, both for producers and breeders. With our research, we determined the potential of the early stage of blue honeysuckle berries under the conditions of their cultivation in the Forest Steppe of Ukraine and the weather conditions of the year of the specified region. We assessed how early we can get a crop and set what quality and what it will be. To clearly understand the quality of the grown fruits, their average weight, size and uniformity were studied. From nutritional indicators of fruit quality, the content of dry matter, soluble solids, sugars and titrated acids was studied, from biologically active substances, the content of vitamin C and total phenolic was determined. It was found that in the zone of the Forest Steppe of Ukraine from the studied group of varieties, the highest yield potential, 3.13 kg from a bush for the second year of fruiting and fruit mass 2.4 g, had a variety of Canadian breeding ‘Boreal Beauty’. The fruits of the cultivars ‘Duet’ (4.3) and ‘Boreal Blizzard’ (4.5) were distinguished by the balance of taste according to the sugar-acid index, and the maximum amount of total phenolics for the studied group of varieties was accumulated by the fruits of ‘Boreal Beast’ (1,000 mg 100 g-1).

Key words:

, , , , ,



427-432 K. Laos , E. Kirs , R. Pall and K. Martverk
The Crystallization Behaviour of Estonian Honeys
Abstract |
Full text PDF (100 KB)

The Crystallization Behaviour of Estonian Honeys

K. Laos¹ ², E. Kirs¹ ², R. Pall¹ and K. Martverk¹

¹Department of Food Processing, Tallinn University of Technology, Ehitajate tee 5, EE12086 Tallinn, Estonia; e-mails: katrin.laos@ttu.ee; evelinkirs@gmail.com; praili@hotmail.com; kaie.martverk@ttu.ee
²Competence Center of Food and Fermentation Technologies, Akadeemia tee 15B, EE12618 Tallinn, Estonia

Abstract:

The feasibility of water activity and viscosity measurement was studied to characterize the isothermal crystallization of Estonian honeys. In parallel, samples were observed by light microscopy. The most important phenomenon for crystallization is the fructose/glucose ratio in favour of glucose. The increase in water activity and viscosity was noticed during crystallization. Polarized light microscopy was more sensitive than water activity or viscosity for determining the crystallization time.

Key words:

, , , ,



31–36 M. Jalakas, K. Kelt and K. Karp
The yield and fruit quality of sea buckthorn (Hippophae rhamnoides L.) after rejuvenation cutting
Abstract |
Full text PDF (190 KB)

The yield and fruit quality of sea buckthorn (Hippophae rhamnoides L.) after rejuvenation cutting

M. Jalakas¹, K. Kelt² and K. Karp¹

¹Institute of Horticulture, Estonian Agricultural University, Kreutzwaldi 64, 51014 Tartu, Estonia; e-mail: kkarp@eau.ee
²Polli Horticultural Institute of the Estonian Agricultural University, 69104 Karksi-Nuia, Estonia; e-mail: asta@pai.neti.ee

Abstract:

The yield and fruit quality of 6 sea buckthorn (Hippophae rhamnoides L.) cultivars of a Moscow breeding programme were studied at the Rõhu Experimental Station in South Estonia. The chemical contents of fruits of sea buckthorn were analysed after 3 months of cold-storage at –18°C. ‘Trofimovskaya’ appeared to have more sugars (2.9%) than the other cultivars. ‘Otradnaya’ had the lowest acid content (2.1%). ‘Vorobjevskaya’, ‘Trofimovskaya’ and ‘Otradnaya’ had higher ascorbic acid contents (about 65 mg/100 g) than the other tested cultivars. ‘Vorobjevskaya’ gave the highest yield (9.6 kg/tree) in the 3rd year after cutting down the trees to 2.5 m height. In the following year, the yield of the experiment was significantly higher, whereas cultivars Trofimovskaya and Botanicheskaya had the biggest yields.

Key words:

, , ,