Chromosomal interchanges induced in tradescantia microspores by fast neutrons from uranium fission
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چکیده
منابع مشابه
The Effect of Oxygen on the Production by Fast Neutrons of Chromosomal Aberrations in Tradescantia Microspores.
HE studies of THODAY and READ (1947) using root-tip cells of Vicia T j a b a demonstrated that oxygen has a marked effect in increasing the frequency of X-ray-induced chromosome aberrations. These investigators later showed (1949) that when alpha rays are used, the oxygen effect is much less, since the yield of aberrations with oxygen present was only slightly greater than in its absence. In ex...
متن کاملPostirradiative Effects on Chromosomal Aberrations in Tradescantia Microspores.
INCE 1939 when SAX employed the time-intensity factor to determine how S long a chromosome break would remain open and thus be available for interaction with other breaks, many different methods of influencing X-ray-induced chromosomal aberrations have been used in studying the rejoining capacity of broken chromosomes. SAX concluded that high-intensity radiation is more eff ective in producing ...
متن کاملDose Fractionation on Chromosome Aberration Frequencies I K Tradescantia Microspores. Neutrons
HE previous paper (DE SERRES and GILES 1953) has described the results T of experiments investigating the effects of fractionated doses of X-rays on the frequency of chromosome aberrations induced in Tradescantia microspores. The results of these studies demonstrate that there is a marked effect of X-ray dosage fractionation in reducing the yield of 2-hit aberration types and, further, that no ...
متن کاملTagging fast neutrons from a 252Cf fission-fragment source.
Coincidence and time-of-flight measurement techniques are employed to tag fission neutrons emitted from a 252Cf source sealed on one side with a very thin layer of Au. The source is positioned within a gaseous 4He scintillator detector. Together with α particles, both light and heavy fission fragments pass through the thin layer of Au and are detected. The fragments enable the corresponding fis...
متن کاملChromosomal Interchanges in Maize.
Chromosomal interchanges, or reciprocal translocations, in maize are of primary interest because of the opportunities they offer for the study of chromosome behavior and crossing over. The great volume of work which has been done on crossing over and on translocations in Drosophila has yielded an abundance of statistical data on crossing over and chromosome distribution. For this type of work D...
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ژورنال
عنوان ژورنال: Journal of Cellular and Comparative Physiology
سال: 1950
ISSN: 0095-9898,1553-0809
DOI: 10.1002/jcp.1030350406