Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 3

Liczba wyników na stronie
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych:  hard wheat
help Sortuj według:

help Ogranicz wyniki do:
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
Chemical composition of common wheat – Triticum aestivum ssp. vulgare Vill. Host., hard wheat – Triticum durum Desf., and spelt – Triticum aestivum ssp. spelta (L.) Thell grains was investigated. Total protein, wet gluten, fiber, ash, carbohydrates, falling number, macronutrients (phosphorus, potassium, calcium, magnesium), and microelements (copper, iron, manganese, zinc) were determined. Also standard deviation, variability and correlation coefficients were calculated. Hard wheat and spelt lines were characterized by much higher contents of total protein, wet gluten, and falling number value than common wheat; however, the highest protein concentration and falling number was recorded in grains of hard wheat. Common wheat was distinguished by low ash content and the highest carbohydrates level. Higher percentage of macronutrients and microelements in grains of spelt and hard wheat, as compared to common wheat, confirms the usefulness of these species for foodstuff production. Among the qualitative traits studied, content of carbohydrates appeared to be the least variable (cv = 2.2%), while the highest variability (cv = 31.1%) was shown by fat content. Significant correlations for the following trait pairs were observed: protein–gluten, protein–carbohydrates, fat–ash, fat–falling number, carbohydrates– gluten, and ash–falling number.
The differences and similarities of endosperm microstructure in different places of vitreous and mealy kernels of wheat of different origin and hardness were evaluated. Kernels of seven T. durum and five T. aestivum cultivars of different origin, protein content, and mechanical resistance were investigated. Five points on the kernel cross-section surface were selected for endosperm microstructure observation with scanning electron microscope JEOL 5200. Digital image analysis (DIA) was used for quantification of endosperm micro structure by transformation of the microscopic pictures and measuring the area and number of transformed image elements. Type of wheat (T. durum and T. aestivum), type of kernel (vitreous and mealy) and sampling place on the cross-section surface influenced the endosperm microstructure statistically significantly. Despite high standard deviations within the data set for single kernel (from 5 to 25%), differences in vitreous and mealy kernels of particular wheat cultivars were evidently clear. Despite differences between vitreous and mealy kernels, types of wheat were very well classified in discriminant analysis. It should be said, however, that the differences in microstructure of mealy and vitreous kernels within the cultivar are smaller than those in the microstructure of different wheat types i.e. T. durum and T. aestivum.
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.