Showing papers on "Nigella damascena published in 1987"
TL;DR: The oxygen enhancement ratio (OER) was investigated in Nigella and Allium in view of the modifications of the parameters mentioned above and the distribution of chromosome aberrations was found to be non-random, showing clusters at regular intervals.
Abstract: Fast rejoining processes have been mainly investigated after fractionated exposures to 60 Co γ-rays of Nigella damascena seeds. Parameters such as initial and final levels of chromosome aberrations and threshold values were defined and the time at which rejoining occurs could be accurately assessed. Such results could be reproduced in two other species; Allium cepa and Vicia faba in the same experimental conditions. In Nigella damascena , results could also be extended to accelerated β-electrons. The oxygen enhancement ratio (OER) was investigated in Nigella and Allium in view of the modifications of the parameters mentioned above. These parameters were also deeply modified by 3 chelating agents: dipyridyl (DP), diethyldithiocarbamate (DIECA) and cupferron (CUPF). After pretreatments with dipyridyl, the distribution of chromosome aberrations was found to be non-random, showing clusters at regular intervals. All these data are used to reinterpret the fast rejoining processes after fractionated exposures to ionizing radiations.
6 citations
TL;DR: Ch Chromosome damage was observed at the first mitosis after the onset of germination and some aneuploid cells were found which are presumed to have arisen from chromosome non-disjunction after diazepam.
5 citations