Collection of Czechoslovak Chemical Communications - digital archive 

Individual author index pages

• Helena Velgová
• Antonín Trka

Other CCCC articles of these authors

• Ladislav Kohout, Helena Velgová, Miroslav Strnad and Miroslav Kamínek
  Brassino steroids with androstane and pregnane skeleton
  1987, Vol. 52, Issue 2, pp. 476–486 [Abstract]
• Miloš Buděšínský, Antonín Trka, Karel Stránský and Milan Streibl
  Heterocyclic nitrogen-containing compounds from the extract of the springtail Tetrodontophora bielanensis (WAGA)
  1986, Vol. 51, Issue 4, pp. 956–963 [Abstract]
• Karel Stránský, Antonín Trka, Miloš Buděšínský and Milan Streibl
  Lipidic compounds from the extract of the springtail Tetrodontophora bielanensis (WAGA)
  1986, Vol. 51, Issue 4, pp. 948–955 [Abstract]
• Helena Velgová
  Participation of the oxygen-containing substituent in alkaline saponification of 3,4a-disubstituted 4,4-dimethyl-5,6β-epoxy-A-homo-5β-cholestane derivatives
  1986, Vol. 51, Issue 4, pp. 930–936 [Abstract]
• Helena Velgová and Jaroslav Zajíček
  Reaction of 3,4a-disubstituted 4,4-dimethyl-5,6β-epoxy-A-homo-5β-cholestane derivatives with reducing agents
  1985, Vol. 50, Issue 11, pp. 2457–2470 [Abstract]
• Helena Velgová and Ladislav Kohout
  6,7-Secoandrostane derivatives
  1985, Vol. 50, Issue 4, pp. 962–972 [Abstract]
• Helena Velgová and Jaroslav Zajíček
  Oxidation and epoxidation of 4,4-dimethyl-A-homo-5-cholesten-4a-ols
  1985, Vol. 50, Issue 1, pp. 114–131 [Abstract]
• Mirko Černý and Antonín Trka
  Formation of sulphur compounds during the hydrodenitrogenation of aniline, cyclohexylamine, benzylamine, and 2-phenylethylamine on a nickel-tungsten catalyst in the presence of hydrogen sulphide
  1984, Vol. 49, Issue 10, pp. 2387–2392 [Abstract]
• Zdenko Procházka, Michal Lebl, Tomislav Barth, Jan Hlaváček, Antonín Trka, Miloš Buděšínský and Karel Jošt
  Synthesis and properties of oxytocin analogues modified in the tripeptide side chain
  1984, Vol. 49, Issue 3, pp. 642–652 [Abstract]
• Helena Velgová
  4,4-Dimethyl-A-homoandrostane epoxides
  1984, Vol. 49, Issue 1, pp. 150–156 [Abstract]
• Josef Pola, Pavel Kubát, Josef Vítek, Marta Farkačová and Antonín Trka
  cw CO₂ laser photosensitized decomposition of n-heptane
  1983, Vol. 48, Issue 12, pp. 3527–3531 [Abstract]
• Mirko Černý and Antonín Trka
  Formation of sulphur compounds in the hydrodenitrogenation of 2-methylquinoline, 2-methylpiperidine, indole, and isoquinoline on a nickel-tungsten catalyst in the presence of hydrogen sulphide
  1983, Vol. 48, Issue 12, pp. 3413–3420 [Abstract]
• Helena Velgová
  4,4-Dimethyl-A-homoandrostane epoxides
  1983, Vol. 48, Issue 9, pp. 2536–2548 [Abstract]
• Helena Velgová
  Stereochemistry of epoxidation and hydroboration of some 4,4-dimethyl-A-homo-5-cholestene derivatives
  1983, Vol. 48, Issue 6, pp. 1774–1782 [Abstract]
• Mirko Černý and Antonín Trka
  Formation of sulphur compounds in hydrodenitrogenation of quinoline, 1,2,3,4-tetrahydroquinoline, pyridine, piperidine and 1-pent-4-enylamine on a nickel-tungsten catalyst in the presence of hydrogen sulphide
  1983, Vol. 48, Issue 6, pp. 1749–1758 [Abstract]
• Ladislav Kohout, Alexander Kasal, Vlastimil Šanda and Helena Velgová
  Rearrangement of the 16,17-cyclopropano derivatives
  1983, Vol. 48, Issue 1, pp. 173–183 [Abstract]
• Antonín Trka and Helena Velgová
  Mass spectra of 4,4-dimethyl-A-homocholestane-3,5- and 3,4a diols and their derivatives
  1982, Vol. 47, Issue 12, pp. 3328–3338 [Abstract]
• Antonín Trka and Alexander Kasal
  Inductive effect in EI-mass spectra of some 5,6-dihalogenides and 5,6-halohydrins of 5α-cholestan-3β-ol and 3β-acetoxy-5α-cholestane
  1982, Vol. 47, Issue 11, pp. 2946–2960 [Abstract]
• Antonín Trka and Helena Velgová
  Mass spectra of 4,4-dimethyl-A-homo-4a,6-cholestadien-3-ols, 4,4-dimethyl-A-homo-5-cholestene-3,4a-diols and their derivatives
  1982, Vol. 47, Issue 10, pp. 2768–2778 [Abstract]
• Helena Velgová
  Acid catalysed opening of 4,4-dimethyl-4a,5-epoxy-A-homocholestane derivatives
  1982, Vol. 47, Issue 9, pp. 2530–2539 [Abstract]
• Helena Velgová, Jorga Smolíková, Antonín Trka and Antonín Vítek
  Cyclopropyl→cyclobutyl rearrangement in intramolecular cyclization of 3,5-bridged B-secoandrostane-6,7(or 5,7)-diols and mass spectra of products
  1982, Vol. 47, Issue 8, pp. 2280–2290 [Abstract]
• Helena Velgová and Antonín Trka
  Reaction of lithium aluminium hydride with 4,4-dimethyl-4a,5-epoxy-A-homocholestane derivatives and mass spectral fragmentation of some degradation products
  1982, Vol. 47, Issue 7, pp. 2007–2023 [Abstract]
• Juraj Harmatha, Miloš Buděšínský and Antonín Trka
  The structure of yatein. Determination of the positions, and configurations of benzyl groups in lignans of the 2,3-dibenzylbutyrolactone type
  1982, Vol. 47, Issue 2, pp. 644–663 [Abstract]
• Helena Velgová and Antonín Trka
  Epoxidation of 4,4-dimethyl-A-homo-4a-cholestene derivatives and a study of electron impact mass spectra of the epoxidation products
  1982, Vol. 47, Issue 1, pp. 315–337 [Abstract]
• Helena Velgová and Jorga Smolíková
  4,4-Dimethyl-A-homocholestane derivatives
  1981, Vol. 46, Issue 3, pp. 607–625 [Abstract]
• Alexander Kasal and Antonín Trka
  Splitting off of water from the molecular ions of steroidal cyclopropyl ketones
  1980, Vol. 45, Issue 11, pp. 2985–2997 [Abstract]
• Antonín Trka and Alexander Kasal
  Electron impact mass spectra of some vicinal trans-dihalo- and trans-hydroxyhalocholestanes
  1980, Vol. 45, Issue 6, pp. 1720–1733 [Abstract]
• Helena Velgová, Miroslava Synáčková and Václav Černý
  Preparation of some 3α,5-cycloandrostane derivatives with expanded ring B
  1979, Vol. 44, Issue 1, pp. 260–268 [Abstract]
• Helena Velgová, Dietrich Zeigan, Günther Engelhardt and Antonín Trka
  Cyclization of 17-ethylenedioxy-3α,5-cyclo-6,7-seco-5α-androstane-6,7-diol
  1979, Vol. 44, Issue 1, pp. 128–144 [Abstract]