Zobrazeno 1 - 8
of 8
pro vyhledávání: '"Ursula Ritter"'
Publikováno v:
Journal of Photochemistry and Photobiology A: Chemistry. 147:157-175
The chemical behaviour of 32 selected 1,1-dicyano-1-alkenes (DCNA) that are devoid of additional unsaturation and of additional hetero-atoms, upon direct excitation by continuous irradiation with light of 253.7 nm wavelength into the long-wavelength
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::14775484235d3d729a764a2eb6ff52ef
https://doi.org/10.1016/s1010-6030(01)00602-5
https://doi.org/10.1016/s1010-6030(01)00602-5
Publikováno v:
Journal of Photochemistry and Photobiology A: Chemistry. 147:177-190
1,1-Dicyano-1-alkenes (DCNA) that lack further unsaturation undergo formation of 1,1-dicyano-cyclopropanes via 1,2-migration of either hydrogen or methyl/alkyl from C-3 to C-2 in their lowest exited singlet state. Quantum yields for this “olefin-to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::75c4ccfd68db230b610e3bc00b59f853
https://doi.org/10.1016/s1010-6030(01)00604-9
https://doi.org/10.1016/s1010-6030(01)00604-9
Publikováno v:
Umweltwissenschaften und Schadstoff-Forschung. 6:251-253
Es werden zwei Testverfahren zur Bestimmung der Zytotoxizitat von Chemikalien vorgestellt. Zum einen wird das ProtozoonTetrahymena pyriformis in Flussigmedium, zum anderen das BakteriumPseudomonas aeruginosa in Mangelmedium 18–20 Stunden zusammen m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fa9af33ecd5433243abd9ac6b936226f
https://doi.org/10.1007/bf02940353
https://doi.org/10.1007/bf02940353
Autor:
Berthold Stilkerieg, Brigitte Schlamann, Johannes Leitich, Jörg Bitter, Oskar E. Polansky, Werner Riemer, Hans Partale, Ursula Ritter-Thomas
Publikováno v:
Chemische Berichte. 113:1020-1032
Enolether wie Ethylvinylether und 1,1-Dimethoxyethen (3f) bilden mit exocyclisch 1,1-dicarbonylsubstituierten Ethenen wie 1 und 2 z.T. schon unterhalb von 0°C thermisch die [4π + 2π]-Addukte 4 bzw. 5 (cyclische Enolacetale und Enolorthoester) und
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dbb68579ed1c9addc8e475e605204bae
https://doi.org/10.1002/cber.19801130321
https://doi.org/10.1002/cber.19801130321
Publikováno v:
Monatshefte f�r Chemie Chemical Monthly. 113:485-494
Knoevenagel condensation of malononitrile withcis- andtrans-2,5-dimethylcyclohexanone (1 c and1 t, respectively) leads to2 c and2 t, respectively, and withtrans-1-decalone to4 t. The equilibria2 c⇌2 t and4 c⇌4 t have been determined as well as, b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2c70738f793b00882ca8b953d5c79a37
https://doi.org/10.1007/bf00799924
https://doi.org/10.1007/bf00799924
Autor:
Ursula Ritter-Thomas, Oskar E. Polansky, Helmut Görner, Werner Riemer, Brigitte Schlamann, Johannes Leitich
Publikováno v:
Monatshefte f�r Chemie. 111:309-329
The title compound,1, slowly decomposes in solution by autodixation, especially in daylight. The chemism of this photoinduced autoxidation has been investigated.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fda70af1b7f4d45bf1a9f8bd18eabd63
https://doi.org/10.1007/bf00938736
https://doi.org/10.1007/bf00938736
Autor:
Ursula Ritter, Ernst R. Welcker
Publikováno v:
DMW - Deutsche Medizinische Wochenschrift. 64:124-127
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d65a3890e7c88716dbef829bdd29d86a
https://doi.org/10.1055/s-0028-1122033
https://doi.org/10.1055/s-0028-1122033
Autor:
Ursula Ritter-Thomas
Publikováno v:
Planta. 114:259-268
1-Sinapoylglucose was isolated in cristalline form from mutants of Matthiola incana. In addition, 1-feruloyl-glucose and 1-p-cumaroyl-glucose were isolated and identified by paper chromatography. The molecular weights of penta-(trimethylsilyl)-1-sina
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1423bd6b0b6653f80211a2a68c579728
https://doi.org/10.1007/bf00389041
https://doi.org/10.1007/bf00389041