Results 311 to 320 of about 840,010 (348)

Microdosimetry of proton and carbon ions

Medical Physics, 2014
Purpose:To investigate microdosimetry properties of 160 MeV/u protons and 290 MeV/u12C ion beams in small volumes of diameters 10–100 nm.Methods:Energy distributions of primary particles and nuclear fragments in the beams were calculated from simulations with the general purpose code SHIELD‐HIT, while energy depositions by monoenergetic ions in ...
Thiansin, Liamsuwan, Martha, Hultqvist, Lennart, Lindborg, Shuzo, Uehara, Hooshang, Nikjoo   +4 more
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Metal Ion Function in Carbonic Anhydrase

Angewandte Chemie International Edition in English, 1972
AbstractThe purpose of this review is to present an up‐to‐date account of the chemistry of the metal ion in the enzyme carbonic anhydrase. The interest lies in how the study of the metal may lead to deductions concerning the chemistry of the enzyme's action and in the way that metalloenzyme chemistry seems to demand a new appraisal of some aspects of ...
R H, Prince, P R, Woolley
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Ion Deposited Carbon Coatings.

1983
Abstract : The overall objective of this program is to demonstrate a system capable of reproducibly coating polycarbonate plastic sheet with ion deposited transparent carbon. The carbon coatings are to be characterized on the plastic sheet for potential use as a durable, abrasion resistant coating for windshield and canopy assemblies.
M. Stein, S. Aisenberg
openaire   +1 more source

Strip injection for carbon ion synchrotrons

Review of Scientific Instruments, 2007
Requirements and effects of strip injection of C4+ at 6MeV∕u into carbon ion synchrotrons are studied. The setup is composed of three chicane dipoles, one Lambertson septum, and one carbon stripping foil at a thickness of 60μg∕cm2. The required length of the injection section is about 4.1m.
S Y, Lee, W M, Tam, Z, Liu
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Gantries for carbon ions

Health and Technology
PurposeThis article summarizes the short lecture on gantries given at the "Hadrontherapy: status and perspectives. Development of a hadrontherapy facility: learning from the existing" event.Methods and materialsAn introduction to gantries is given describing what a gantry is and which are the main difficulties and choices for an ion gantry.
Pullia, M. G., Felcini, E., Benedetto, E., Dassa, L., De Matteis, E., Donetti, M., Frisella, G., Karppinen, M., Kurfurst, C., Mariotto, S., Mereghetti, A., Mirandola, A., Pella, A., Perini, D., Piacentini, L., Pivi, M. T. F., Prioli, M., Ratkus, A., Rossi, L., Sabbatini, L., Savazzi, S., Stock, M., Torims, T., Uberti, S., Valente, R., Vannozzi, A., Vretenar, M.   +26 more
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Comparison of Carbon Ions Versus Protons

The Cancer Journal, 2009
At present, beam ion beam therapy has started to spread worldwide. In Europe and Asia, combined carbon/proton facilities are favored, but in the US, only proton centers are under construction. This development is partially due to the different funding procedures and partially due to the more complex physical and especially biologic features of the ...
Uli, Weber, Gerhard, Kraft
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Erosion Resistance of Carbon-Carbon Ion Optics

Journal of Propulsion and Power, 2001
A principal consideration in the design of ion thrusters for spacecraft propulsion is erosion of the downstream grid in the ion optics. Achieving adequate lifetime (10,000 h or more for many potential missions) without grid wear-through can impose signiŽ cant constraints on thruster performance.
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Biological characteristics of carbon-ion therapy

International Journal of Radiation Biology, 2009
Radiotherapy using charged and/or high-linear energy transfer (LET) particles has a long history, starting with proton beams up to now carbon-ions. Radiation quality of particle beams is different from conventional photons, and therefore the biological effects of high-LET irradiation have attracted scientific interests of many scientists in basic and ...
Koichi, Ando, Yuki, Kase
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[Particle therapy: carbon ions].

Bulletin du cancer, 2010
Carbon ion therapy is an innovative radiation therapy. It has been first proposed in the forties by Robert Wilson, however the first dedicated centres for human care have been build up only recently in Japan and Germany. The interest of carbon ion is twofold: 1) the very sharp targeting of the tumour with the so called spread out Bragg peak that ...
Pascal, Pommier, Yi, Hu, Marie-Hélène, Baron, Olivier, Chapet, Jacques, Balosso   +4 more
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Ion implantation in tetrahedral amorphous carbon

Physical Review B, 1995
Tetrahedral amorphous carbon (ta-C) is a dense form of amorphous carbon with a structure consisting of a highly tetrahedral bonding network. Approximately 20% of the atoms in ta-C are ${\mathit{sp}}^{2}$ hybridized and the presence of these sites plays an important role in the electrical and optical properties of the material.
, McCulloch, , Gerstner, , McKenzie, , Prawer, , Kalish   +4 more
openaire   +2 more sources