Heavy ion mutagenesis: Linear energy transfer effects and genetic linkage

1995 ◽  
Vol 34 (2) ◽  
pp. 73-78 ◽  
Author(s):  
A. Kronenberg ◽  
S. Gauny ◽  
K. Criddle ◽  
D. Vannais ◽  
A. Ueno ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Linear Energy Transfer ◽  
Genetic Linkage ◽  
Heavy Ion ◽  
Transfer Effects

Linear energy transfer effects on time profiles of scintillation of Ce-doped LiCaAlF6 crystals

2015 ◽  
Vol 365 ◽  
pp. 529-532 ◽  
Author(s):  
Takayuki Yanagida ◽  
Masanori Koshimizu ◽  
Satoshi Kurashima ◽  
Kazuhiro Iwamatsu ◽  
Atsushi Kimura ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Linear Energy Transfer ◽  
Transfer Effects ◽  
Time Profiles

scholarly journals Linear Energy Transfer-Dependent Change in Rice Gene Expression Profile after Heavy-Ion Beam Irradiation

PLoS ONE ◽  
2016 ◽  
Vol 11 (7) ◽  
pp. e0160061 ◽  
Author(s):  
Kotaro Ishii ◽  
Yusuke Kazama ◽  
Ryouhei Morita ◽  
Tomonari Hirano ◽  
Tokihiro Ikeda ◽  
...  
Keyword(s):  
Gene Expression ◽  
Energy Transfer ◽  
Linear Energy Transfer ◽  
Ion Beam ◽  
Heavy Ion ◽  
Beam Irradiation ◽  
Rice Gene ◽  
Ion Beam Irradiation ◽  
Dependent Change ◽  
Heavy Ion Beam

Linear-energy-transfer effects on the radiolysis of liquid water at temperatures up to 300°C – a Monte-Carlo study

2001 ◽  
Vol 341 (1-2) ◽  
pp. 135-143 ◽  
Author(s):  
Marie-Anne Hervé du Penhoat ◽  
Jintana Meesungnoen ◽  
Thomas Goulet ◽  
Abdelali Filali-Mouhim ◽  
Samlee Mankhetkorn ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Energy Transfer ◽  
Liquid Water ◽  
Linear Energy Transfer ◽  
Monte Carlo Study ◽  
Transfer Effects

Responses of synchronous L5178Y S/S cells to heavy ions and their significance for radiobiological theory

1989 ◽  
Vol 237 (1286) ◽  
pp. 27-42 ◽  
Keyword(s):  
Cell Cycle ◽  
Energy Transfer ◽  
Linear Energy Transfer ◽  
Relative Biological Effectiveness ◽  
Survival Curve ◽  
Heavy Ion ◽  
Ion Beams ◽  
X Rays ◽  
Biological Effectiveness ◽  
Ionizing Radiations

Synchronous suspensions of the radiosensitive S/S variant of the L5178Y murine leukaemic lymphoblast at different positions in the cell cycle were exposed aerobically to segments of heavy-ion beams ( 20 Ne, 28 Si, 40 Ar, 56 Fe and 93 Nb) in the Bragg plateau regions of energy deposition. The incident energies of the ion beams were in the range of 460 ± 95 MeV u -1 , and the calculated values of linear energy transfer (LET ∞ ) for the primary nuclei in the irradiated samples were 33 ± 3, 60 ± 3, 95 ± 5, 213 ± 21 and 478 ± 36 keV μm -1 , respectively; 280 kVp X-rays were used as the baseline radiation. Generally, the maxima or inflections in relations between relative biological effectiveness (RBE) and LET ∞ were dependent upon the cycle position at which the cells were irradiated. Certain of those relations were influenced by post-irradiation hypothermia. Irradiation in the cell cycle at mid -G 1 to mid-G 1 +3 h, henceforth called G 1 to G 1 + 3 h, resulted in survival curves that were close approximations to simple exponential functions. As the LET ∞ was increased, the RBE did not exceed 1.0, and by 478 keV μm -1 it had fallen to 0.39. Although similar behaviour has been reported for inactivation of proteins and certain viruses by ionizing radiations, so far the response of the S/S variant is unique for mammalian cells. The slope of the survival curve for X-photons ( D 0 :0.27 Gy) is reduced in G 1 to G 1 + 3 h by post-irradiation incubation at hypothermic temperatures and reaches a minimum ( D 0 : 0.51 Gy) at 25 °C. As the LET ∞ was increased, however, the extent of hypothermic recovery was reduced progressively and essentially was eliminated at 478 keV μm -1 . At the cycle position where the peak of radioresistance to X-photons occurs for S/S cells, G 1 + Sh, increases in LET ∞ elicited only small increases in RBE (at 10% survival), until a maximum was reached around 200 keV μm -1 . At 478 keV μm -1 , what little remained of the variation in response through the cell cycle could be attributed to secondary radiations (δ rays) and smaller nuclei produced by fragmentation of the primary ions. Definitions 1. Linear energy transfer (LET ∞ ) is the energy deposited per unit length of track by an ionizing particle and usually is measured in kiloelectron volts per micrometer (in water). 2. Penumbra . Atomic interactions along the track of a heavy ion result in the ejection of electrons with energies sufficient to move beyond the region of dense ionization which constitutes the track core, and so may be considered to form a penumbra of sparsely ionizing radiations around the track core. 3. RBE . The effectiveness of a densely ionizing radiation (heavy ion) compared to a sparsely ionizing radiation, e. g. X- or γ -photons, is measured by the inverse ratio of the doses of each radiation needed to produce a given radiobiological effect, and is known as the relative biological effectiveness (RBE): the usual reference radiation is 250 kVp X-rays. 4. D 0 is a measure of the radiosensitivity of a cell as determined from the (limiting) linear slope of the survival curve, and is the dose in Gray (1 Gy ≡ 1 Joule kg -1 ) required to reduce the survival at a point anywhere in that region of the survival curve to 37% of its value at that point.

Irradiation of Atactic Polystyrene: Linear Energy Transfer Effects

2008 ◽  
Vol 112 (35) ◽  
pp. 10879-10889 ◽  
Author(s):  
M. Ferry ◽  
Y. Ngono-Ravache ◽  
V. Picq ◽  
E. Balanzat
Keyword(s):  
Energy Transfer ◽  
Linear Energy Transfer ◽  
Transfer Effects ◽  
Atactic Polystyrene

scholarly journals Model for Cumulative Solar Heavy Ion Energy and Linear Energy Transfer Spectra

2007 ◽  
Vol 54 (6) ◽  
pp. 1985-1989 ◽  
Author(s):  
M. A. Xapsos ◽  
C. Stauffer ◽  
T. Jordan ◽  
J. L. Barth ◽  
R. A. Mewaldt
Keyword(s):  
Energy Transfer ◽  
Linear Energy Transfer ◽  
Heavy Ion ◽  
Ion Energy
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