Zobrazeno 1 - 10
of 53
pro vyhledávání: '"Soňa Vašíčková"'
Publikováno v:
Journal of Cultural Heritage. 13:275-284
Thirteen samples of an efflorescence collected from the surface of beeswax seals or from beeswax used for their restoration were analysed in detail. The samples were of different origin, age and storage history. The composition and the incidence of t
Autor:
Josef Cvačka, Bernd R.T. Simoneit, L'udmila Turčániová, Anton Zubrik, David Šaman, Soňa Vašíčková, Michal Lovás
Publikováno v:
Organic Geochemistry. 40:126-134
Aliphatic diterpenes were isolated from brown coal from Handlova, Slovakia, using microwave assisted extraction of mechanically activated coal powder. The parameters of the extraction procedure were optimized to get the target compounds in high yield
Autor:
Josef Cvačka, Oldřich Hovorka, Jiří Kindl, Edita Kofroňová, Irena Valterová, Pavel Jiroš, Karel Stránský, Soňa Vašíčková
Publikováno v:
Lipids. 43:441-450
Unusual fatty acids with 24, 26, and 28 carbon atoms were found in triacylglycerols (TAGs) isolated from fat body tissue of bumblebee Bombus pratorum. The most abundant one was (Z,Z)-9,19-hexacosadienoic acid. Its structure was determined by mass spe
Publikováno v:
Journal of Molecular Structure. 846:157-160
From extraction experiments and γ-activity measurements, the extraction constant corresponding to the equilibrium H 3 O + (aq) + 1 · Na + (nb) ⇆ 1 ·H 3 O + (nb) + Na + (aq) taking place in the two-phase water–nitrobenzene system ( 1 = hexaethy
Publikováno v:
Tetrahedron Letters. 46:7923-7926
Functionalised hydroxy α-alkynones were transformed to the corresponding spiroketals by a one-pot cascade consisting of palladium-catalysed hydrogenation of the triple bond, hydroxyl group deprotection and spirocyclisation under mild nonacidic condi
Autor:
Karel Vokáč, Pavel Tlustoš, Daniela Pavlíková, Milan Pavlík, Soňa Vašíčková, Jiřina Száková, Jiří Balík
Publikováno v:
Analytical and Bioanalytical Chemistry. 381:863-872
This work investigates how the amounts of some important substances in a plant, and their behaviour inside the plant, depend on the levels of stress placed on the plant. To this end, model plant spinach (Spinacia oleracea L.) was cultivated on soil t
Autor:
Jiří Balík, Daniela Pavlíková, Soňa Vašíčková, Milan Pavlík, Jiřina Száková, Pavel Tlustoš, Karel Vokáč
Publikováno v:
Applied Organometallic Chemistry. 18:619-625
The distribution of trace elements into important groups of compounds in seeds was investigated using a seven-step sequential extraction of seed biomass (solvents used: petroleum ether, ethyl acetate, butanol, methanol, methanol + H 2 O (1 + 1; v/v),
Publikováno v:
Scopus-Elsevier
Partial characterization of iron binding compounds in spinach above ground biomass and differences between binding of Cd, Zn and Fe in spinach biomass were investigated on two soils treated by sewage sludge in model pot experiment. After application
Autor:
Petr Žáček, Romana Hadravová, Vladimír Vrkoslav, Soňa Vašíčková, Stefan Jarau, Pavel Jiroš, Audrey Coppée, Jan Šobotník, Irena Valterová
Publikováno v:
Die Naturwissenschaften. 99(12)
Among the large number of exocrine glands described in bees, the tarsal glands were thought to be the source of footprint scent marks. However, recent studies showed that the compounds used for marking by stingless bees are secreted by leg tendon ins
Autor:
Soňa Vašíčková, Blanka Kalinová, Aleš Tomčala, Jan Šobotník, Pavel Jiroš, Kateřina Černá, Jakub Straka, Josef Cvačka, Ullrich Jahn, Petr Šebesta
Publikováno v:
Journal of chemical ecology. 38(12)
A female-produced sex pheromone of Stylops muelleri was identified as an unusually branched saturated aldehyde (9R)-3,5-syn-3,5,9-trimethyldodecanal. We named it stylopsal. Its structure was established by using mass spectrometry, infrared spectrosco