Tyrimo objektas – melsvauogio sausmedžio 'Atut', 'Duet', 'Karina', 'Fialka', 'Dlinoplodnaja' ir 'Kalakolcik' veislių uogos. Tyrimo tikslas – parinkti konservavimo būdą ir įvertinti jo įtaką sausmedžio uogų kokybei. Tyrimo metodai: standartizuotais metodais buvo nustatyta uogų biocheminė sudėtis (askorbo rūgštis, mg 100 g-1; sausosios medžiagos, žalia ląsteliena, žali baltymai ir žali pelenai, proc.), juslinė analizė (skonis ir kvapas, tekstūra, išorinis patrauklumas), biometriniai duomenys (masė, ilgis ir skersmuo). Atlikta visų tyrimo duomenų statistinė analizė. Tyrimo rezultatai. Esmingai didžiausias vitamino C kiekis, nepriklausomai nuo konservavimo būdo, nustatytas 'Karina' veislės uogose, o 'Atut' veislės uogose esmingai didžiausias sausųjų medžiagų kiekis. Šaldytose 'Atut' veislės uogose buvo nustatyta esmingai daugiausiai žalios ląstelienos, žalių baltymų ir žalių pelenų, o liofilizuotose 'Kalakolcik' uogose žalių baltymų ir pelenų kiekiai. Geriausiomis juslinėmis savybėmis pasižymėjo 'Karina', 'Kalakolcik' ir 'Dlinoplodnaja' veislių uogos. Esmingai didžiausia šviežių uogų masė nustatyta 'Duet', o šaldytų ir liofilizuotų 'Atut' veislės uogų. Rekomenduojama sausmedžio uogas liofilizuoti, nes konservuojant šiuo būdu maksimaliai išsaugomos uogų juslinės savybės ir maistinė vertė. Nustatyta, kad sausmedžio uogų kokybė priklauso ir nuo veislės genetinių savybių ir nuo konservavimo būdo. Tyrimas parodė, kad 'Atut' ir 'Karina' veislių uogos, nepriklausomai nuo konservavimo... [toliau žr. visą tekstą] / Research object – six cultivars of blue-honeysuckle berries: 'Atut', 'Duet'‚ 'Karina', 'Fialka', 'Dlinoplodnaja' and 'Kalakolcik'. Research aim – to choose the method of preservation and to evaluate its influence on the quality of honeysuckle berries. Research methods: chemical composition of berries (the amount of ascorbic acid (mg 100 g-1), dry matter, crude fibre, crude protein, crude ash, %), sensory analysis (taste and aroma, texture, external attractiveness) and biometric indicators (weight, length and diameter) were evaluated using standardized methods. All research data was tested statistically. Research results. Independent of the method of preservation, 'Karina' berries were characterized by the highest amount of ascorbic acid, whereas 'Atut' had the highest amount of dry matter. The highest amount of crude fibre, crude protein and crude ash was related to frozen 'Atut' berries, meanwhile lyophilized 'Kalakolcik' berries contained the highest amount of crude protein and crude ash. 'Karina', 'Kalakolcik' and 'Dlinoplodnaja' berries were characterized by the best organoleptic properties. Fresh berries of 'Duet' cultivar as well as frozen and lyophilized berries of 'Atut' cultivar had the largest weight. It is recommended that honeysuckle berries be lyophilized since this particular way of preservation was characterized by the best sensory properties and nutritional value of berries. It was determined that the quality parameters of berries were affected by the genetic... [to full text]

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The tocopherol (Vitamin E) content of forage from three invasive shrub species was measured to assess the value of the shrubs as a source of vitamin E for goats browsing on overgrown Appalachian pastures. Plant leaf clusters were collected from multiflora rose (Rosa multiflora Thunb.), autumn olive (Elaeagnus umbellata Thunb.), and Morrow's honeysuckle (Lonicera morowii Gray) in replicated plots at a site in southern West Virginia during the 1999 growing season. Alpha-, beta-, gamma-, and delta-tocopherol were extracted with hexane, separated by high performance liquid chromatography on a normal-phase diol column, and quantified. Significant differences (P<0.001) in concentration were found among species for all forms of tocopherol. Alpha-tocopherol predominated, accounting for more than 90% of the total tocopherols in all three species. Alpha-tocopherol levels increased in all species with maturity; however, the magnitude of the increase was not the same in all species. At the end of the growing season, autumn olive had the highest levels of alpha-tocopherol (1270 ± 55 ppm dry matter [DM]), followed by Morrow's honeysuckle (840 ± 55 ppm DM), and multiflora rose (610 ± 55 ppm DM). Goats grazing on mature browse may obtain adequate intake of vitamin E. High nutritive value and/or low concentrations of antiquality factors may not coincide with the high levels of vitamin E found in mature tissue, and the actual vitamin E intake will depend on the feeding behavior of the goat. / Master of Science

The theme of this diploma thesis is an assessment of given nutritional parameters in selected kinds of lesser known fruits, specifically 10 varieties of sea buckthorn (Hippophae rhamnoides L.), 12 varieties of cornelian cherry (Cornus mas L.) and 6 varieties of blue honeysuckle (Lonicera caerulea var. kamtschatica). Harvests of two consecutive years (2011 and 2012) were analyzed in the case of blue honeysuckle. The theoretical part was focused on historical, morphological, taxonomic and nutritional aspects of individual plants and food or pharmaceutical utilization. The considerable part of the thesis is devoted to the characterization and the possibilities of determining the contained substances, namely ascorbic acid and polyphenolic compounds, especially anthocyanins. The content of the experimental part was a description of the methods and the results of the analysis of total solids, titratable acidity, total phenolics, total anthocyanins and ascorbic acid in fruits of the selected varieties of the above mentioned fruit species. Based on the measured results, the different varieties of fruits were compared to each other and evaluated.

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