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Akademický článek

Exploitation of kairomones and synomones by Medetera spp. (Diptera: Dolichopodidae), predators of spruce bark beetles

Autor: Jiri HULCR, Marc POLLET, Karel UBIK, Jan VRKOČ

Publikováno v: European Journal of Entomology, Vol 102, Iss 4, Pp 655-662 (2005)

The semiochemical relationships in a predator-prey-host plant system were studied by a series of multiple-choice field assays. The studied system included predatory flies of the genus Medetera (Diptera: Dolichopodidae), the bark beetles Ips typograph

Externí odkaz: https://doaj.org/article/95806b9032964cf99ee8c7a23e87f967

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The role of semiochemicals in tritrophic interactions between the spruce bark beetle Ips typographus, its predators and infested spruce

Autor: Karel Ubik, Jan Vrkoč, J. Hulcr

Publikováno v: Journal of Applied Entomology. 130:275-283

Semiochemical interactions between the spruce bark beetle Ips typographus, its predators Medetera setiventris, Thanasimus formicarius and Thanasimus femoralis, and the host Norway spruce, Picea abies, were studied in the field. The chemicals S-cis-ve

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::351e57ab604f754004ee2c169d0cc1b9
https://doi.org/10.1111/j.1439-0418.2006.01069.x

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Exploitation of kairomones and synomones by Medetera spp. (Diptera: Dolichopodidae), predators of spruce bark beetles

Autor: Marc Pollet, Karel Ubik, Jiri Hulcr, Jan Vrkoč

Publikováno v: European Journal of Entomology, Vol 102, Iss 4, Pp 655-662 (2005)

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8df6dbe1915d32944327d3fd13b7f280
https://www.eje.cz/artkey/eje-200504-0013_Exploitation_of_kairomones_and_synomones_by_Medetera_spp_Diptera_Dolichopodidae_predators_of_spruce_bark_b.php

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Synthesis of N4-Alkyl-5-azacytidines and Their Base-Pairing with Carbamoylguanidines - A Contribution to Explanation of the Mutagenicity of 2'-Deoxy-5-azacytidine

Autor: Alois Piskala, Milena Masojídková, N. B. Hanna, Miroslav Otmar, Karel Ubik, Pavel Fiedler

Publikováno v: Collection of Czechoslovak Chemical Communications. 68:711-743

A series of N4-alkyl-5-azacytidines 3a-3h were prepared by treatment of the 4-methoxy analogue 4 with the respective amines. In the case of propyl-, butyl-, sec-butyl-, benzyl- or furfurylamine, aggregates of azacytidines 3a-3e with their hydrolytic

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d640194c07501c49de7be7e15699c179
https://doi.org/10.1135/cccc20030711

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Study of the biotransformation of a potential benzo[c]fluorene antineoplastic using high-performance liquid chromatography with high-speed-scanning ultraviolet detection

Autor: Milan Nobilis, Pavel Anzenbacher, František Trejtnar, Jaroslav Květina, Kamil Hrubý, Jiří Pastera, Karel Ubik, Zbyněk Svoboda

Publikováno v: Journal of Chromatography B: Biomedical Sciences and Applications. 681:143-151

As the sum of benfluron metabolites found was only a part of the total amount applied, a search for undiscovered metabolites was undertaken in the extracts from isolated rat hepatocytes and in the bile and perfusate in the experiments with an isolate

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d209d5d944da9f7c226cce4ee004274a
https://doi.org/10.1016/0378-4347(95)00523-4

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One-Pot Deuteration and Reduction of Ketones in the Synthesis of [16,16,17-2H3]-Epitestosterone

Autor: Hana Chodounska, Karel Ubik, Alexander Kasal, David Šaman

Publikováno v: Collection of Czechoslovak Chemical Communications. 61:1037-1046

5α-Androstan-17-one and 6β-methoxy-3α,5-cyclo-5α-androstan-17-one were reduced by sodium in deuterium oxide to [16,16,17-2H3]-17β-alcohols. The 17β-tosyloxy group of [16,16,17-2H3]-6β-methoxy-3α,5-cyclo-5α-androstan-17β-ol tosylate was foun

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::446267baf3936df48b96811186e97f00
https://doi.org/10.1135/cccc19961037

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Side Reaction During the Deprotection of Cys(Acm)-Containing Peptides with Iodine. Synthesis of Disulfide Fragments from Cathepsin D Structure

Autor: Václav Kašička, Klaudie Bartová, Michael Mareš, Zdeněk Prusík, Jan Ježek, Karel Ubik, Vlasta Velková

Publikováno v: Collection of Czechoslovak Chemical Communications. 60:1042-1049

Peptides H-TPPQC(Acm)FTV-NH2 (I) and H-VSVPC(Acm)QSASSAS-NH2 (III) were prepared by the solid phase method. Their oxidation with iodine afforded hexadecapeptide II, tetracosapeptide IV and eicosapeptide VI. The disulfide peptides II, IV and VI are de

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a269870d11e4f93afe74fe511b459fa0
https://doi.org/10.1135/cccc19951042

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NMR Determination of the Structure of Peracetylated Icariside B2 from Veratrum Lobelianum BERNH

Autor: Miloš Buděšínský, Václav Suchý, Karel Ubik, Vlasta Földešiová, Daniel Grancai

Publikováno v: Collection of Czechoslovak Chemical Communications. 60:1380-1385

rel(1S,4S,5R)-3,3,5-Trimethyl-4-[( 1E)-3-oxo-1-butenyl]-4,5-epoxy-cyclohexyl-O-β-D-glucopyranoside (I) was isolated from the aerial part of Veratrum lobelianum BERNH. The structure was derived mainly from detailed analysis of 1H and 13C NMR spectra

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5360467ca60d5d280306d109d6f4f73a
https://doi.org/10.1135/cccc19951380

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