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Fluorescence emission from the photosynthetic organisms Tribonema aequale, Anacystis nidulau, and Chlorelia vulgais and from some chlorophyll model systems have been recorded as a function of excitation wavelength and temperature. Considerable simila
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8a209f3b5c05e6fc28f701d22047f1f7
https://doi.org/10.2172/28417
https://doi.org/10.2172/28417
Publikováno v:
Proceedings of the National Academy of Sciences. 82:8602-8605
The naturally occurring radioactive isotope 40K is the single largest contributor to the internal background radiation dose in living organisms. We examined cell growth and mutation rate or frequency in several strains of Escherichia coli in (i) medi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::61f9cab0564958806119e960ee7ee4ab
https://doi.org/10.1073/pnas.82.24.8602
https://doi.org/10.1073/pnas.82.24.8602
Publikováno v:
Bioorganic Chemistry. 3:204-212
A study of the kinetics of the reaction of chlorophyll a with propylamine and isobutylamine indicates a low activation energy (∼5 kcal) and high negative entropy (∼60 eu). Propylamine and isobutylamine react with Ring V cleavage more readily with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4ef7b21c013822366e7ecd2abc1403da
https://doi.org/10.1016/0045-2068(74)90043-1
https://doi.org/10.1016/0045-2068(74)90043-1
Autor:
Roland P. May, W. Hoppe, H. Heumann, Z. Cejka, J.J. Katz, H.L. Crespi, I. Strell, P. Stöckel, W. Zillig, K. Ibel
Publikováno v:
Journal of Applied Crystallography. 12:176-185
In all organisms the multi-subunit enzyme DNA-dependent RNA polymerase catalyses the first basic step in gene expression, the transcription of DNA into RNA. The neutron small-angle scattering effects were studied in the Guinier region by applying the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::00e39b8e750f07777d3d9510ee6818e8
https://doi.org/10.1107/s0021889879012140
https://doi.org/10.1107/s0021889879012140
Publikováno v:
Journal of Pharmaceutical Sciences. 53:612-616
Representative sections of leaf, stem, and root of peppermint plants grown in 70 per cent D 2 O nutrient were examined microscopically; comparison was made of the significant histological features with sections from plants grown in an aqueous nutrien
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fd3ee59dcebb7a181616d84252519a58
https://doi.org/10.1002/jps.2600530608
https://doi.org/10.1002/jps.2600530608
Publikováno v:
Journal of Pharmaceutical Sciences. 53:79-83
The effect of varying concentrations of D 2 O on the growth of peppermint plants was studied over a period of at least 50 days. The extent of deuterium uptake is reported. This appears to be the first detailed study of the effects of extensive replac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8d924c9942bffdf2b0609554fececa3e
https://doi.org/10.1002/jps.2600530115
https://doi.org/10.1002/jps.2600530115