Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 23

Liczba wyników na stronie
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników

Wyniki wyszukiwania

help Sortuj według:

help Ogranicz wyniki do:
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
The content of polyphenols compounds in leaves in populations of red whortleberry (Vac- cinium vitis- idaea L.), bilberry (Vaccinium myrtillus L.) and bearberry (Arctostaphylos uva- ursi (L.) Sprengel) growing wild in Mazury and Podlasie were compared. *7 The highest content of arbutin and tannins was characteristic for bearberry leaves, the highest content of polyphenolic acids was characteristic for bilberry and flavonoids for red whortleberry. Significantly higher content of arbutin and tannins was characteristic for raw materials collected in autumn.
Genetic diversity of common thyme (Thymus pulegioides L.) and wild thyme (Thymus serpyllum L.) by the RAPD method was evaluated. The investigated populations of both species significantly differed in respect of developmental traits as well the content and composition of essential oil. The content of essential oil in the herb Thymus pulegioides was higher. Phenolic substances (thymol and carvacrol) dominated in the essential oil of Thymus pulegioides, whereas terpens (β-myrcene, cineol, borneol and β-cariophyllene) in the essential oil of Thymus serpyllum.
Cytological changes in quiescent or germinated embryos after matriconditioning with Micro-Cel E or osmoconditioning with polyethylene glycol (PEG) were studied in comparison to quiescent or germinated untreated embryos of marjoram (Majorana hortensis L.). The sequence of changes related to embryo activation was identical in untreated and conditioned samples, although conditioned embryos underwent activation earlier. In those embryos the degradation of protein and lipid bodies, accompanied by vacuolation and accumulation of starch grains in amyloplasts, was observed even in nongerminated samples, whereas in control embryos the same ultrastructural changes did not occur until germination. The changes in ultrastructure occurred first in the root cap and proceeded towards the shoot meristem. In cotyledons, few symptoms of activation were detected regardless of the treatment. The appearance of Golgi structures in the root cap identified the radicle protrusion stage of germination.
Antibacterial activity (MIC and MBC) of oil from common thyme and wild thyme was as­sessed. Also the time necessary for gaining bactericidal effect by using these oils was determined. Four straits of standard bacteria: Streptococcus pyogenes, Staphylococcus aureus, Escherichia coli and Pseudomonas aeruginosa were tested. The experiment showed that the essential oil of common thyme had higher antibacterial activity both against Gram-posi­tive bacteria and Gram-negative bacteria, in comparison to the essential oil of wild thyme, which resulted from differences in composition of essential oil of these two species. Es­sential oil of common thyme was characterized by high content of thymol, whereas in essential oil of wild thyme the main compounds were terpenes.
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 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.