CYTOGENETIC EFFECTS OF X-RAYS AND THERMAL NEUTRONS ON DORMANT TOMATO SEEDS

Cytogenetic Effects of X-Rays and Thermal Neutrons on Dormant Tomato Seeds.

HE study reported in this paper concerns the effects of X-rays and thermal neuT trons on dormant seeds of the tomato, Lycopersicon esculentum, expressed as chromosomal abnormalities in root tip mitoses, seedling injury, and chlorophyll and morphological changes. XI and NI refer to the X-rayand thermal neutron-irradiated generations, respectively; Xz and Nz to the progenies of the XI and NI gene...

Comparison of Effects of X-Rays and Thermal Neutrons on Dormant Seeds of Barley, Maize, Mustard, and Safflower.

Cytogenetic effects of low-energy X-rays

Mammography, using 26-30 kV X-rays, is a method routinely used to screen early stages of breast cancer, but some discussion about radiation-related risk associated with this methodology exists. For radioprotection purposes, it has been assigned a quality factor of 1 for all photon energies. However, the relative biological effectiveness (RBE) could increase as photon energy decreases. Analysing...

Debye Waller Factors and Lamb Factors in the Scattering of X-rays, -rays and Thermal Neutrons

The paper reviews the applicability of Debye-Waller factors and of Lamb factors to the non-resonant and resonant elastic scattering of X-rays, gamma-rays and thermal neutrons, emphasizing temporal aspects in the interactions. The influence of static disorder upon elastic scattering, in particular upon resonance scattering, is likewise treated. The scattering of X-rays, y-rays and thermal neutro...

Effects of thermal neutrons on living cells. 1. Lethal effects of thermal neutrons on amoebae.

Lethal effects of thermal neutrons were compared with those of 60Co-ƒÁ-rays on the two types of Amoeba proteus. D37 doses against ƒÁ-rays were 2.5 •~ 105 (M-type) and 7.2 •~ 105 rads (P type), and those for thermal neutrons were 9.1 and 11.7 •~ 1013 n. cm-2 (total flux) respectively. Additions of AET, D2O or boron failed to increase or decrease the lethal effects of thermal neutrons. The lethal...