نتایج جستجو برای: rbe

تعداد نتایج: 686  

Journal: :cell journal 0

objective: to assess relative biological effectiveness (rbe) of 131i radiation relative to 60co gamma rays in glioblastoma spheroid cells. materials and methods: in this experimental study, glioblastoma spheroid cells were exposed to 131i radiation and 60co gamma rays. radiation induced dna damage was evaluated by alkaline comet assay. samples of spheroid cells were treated by radiation from 13...

2010
G. Iancu M. Durante M. Krämer M. Scholz

The ALLEGRO European project aims to give a unified and consistent description as well as recommendations to be applied in estimating the risk of radiation therapy to the healthy tissue. For a complete description of radiation field, neutrons and photons are also to be considered and their dose needs to be estimated. In the target region the dose contribution of these neutral particles remains ...

Journal: :Journal of strength and conditioning research 2005
Robert W Pettitt David J Symons Patricia A Eisenman Julie E Taylor Andrea T White

The repeated bout effect (RBE) is a phenomenon characterized by less delayed onset muscle soreness (DOMS) and torque deficit after the second of 2 separate eccentric exercise bouts. Previous investigators have reported that shifting of optimum angle after an initial bout of eccentric exercise mediates the RBE. We hypothesized that an RBE for elbow extensor exercise occurs after an initial bout ...

Journal: :Genetics 1958
C W Edington M L Randolph

INCE 1927 numerous investigators have subjected various plants and animals to radiations of different ion density to determine the relative biological effectiveness (RBE) of the different radiations. Usually it was found that the RBE increased as the linear energy transfer (LET-energy in electron volts dissipated per micron of tissue traversed by ionizing particles) or ion density of the radiat...

Journal: :Poultry science 2006
H P Piepho

Two sources of methionine (Met) activity are frequently used in commercial feed formulation: DL-2-hydroxy-4-(methylthio) butanoic acid (HMTBA), most commonly available as an 88% solution with 12% water; and DL-methionine (DLM, 99% powder). Despite the fact that both compounds have been in commercial use for over 50 yr, controversy and confusion remain with respect to their relative bioefficacy ...

Journal: :Radiation oncology 2018
Xiaoqiang Li Peyman Kabolizadeh Di Yan An Qin Jun Zhou Ye Hong Thomas Guerrero Inga Grills Craig Stevens Xuanfeng Ding

BACKGROUND To evaluate spot-scanning proton arc therapy (SPArc) and multi-field robust optimized intensity modulated proton therapy (RO-IMPT) in treating stage III non-small-cell lung cancer (NSCLC) patients. METHODS Two groups of stage IIIA or IIIB NSCLC patients (group 1: eight patients with tumor motion less than 5 mm; group 2: six patients with tumor motion equal to or more than 5 mm) wer...

Journal: :The Journal of Cell Biology 1990
W Risau B Engelhardt H Wekerle

The endothelial blood-brain barrier (BBB) has a critical role in controlling lymphocyte traffic into the central nervous system (CNS), both in physiological immunosurveillance, and in its pathological aberrations. The intercellular signals that possibly could induce lymphocytes to cross the BBB include immunogenic presentation of protein (auto-)antigens by BBB endothelia to circulating T lympho...

2017
John GUEULETTE

Carbon ions/Carbon-therapy/Biologieal treatment planlRBE. Duc to the RBE variations, the carbon-ion doses (in Gy) are no longer sufficient to moniter adequately the biological effect of these radiations. Therefore, "RBE dose weighting factors" WRBE allowing for the RBE variations with energy, dose and biological system have to be introduced in the treatment plans in order to provide the physici...

Journal: :PloS one 2016
Eliedonna Cacao Megumi Hada Premkumar B Saganti Kerry A George Francis A Cucinotta

The biological effects of high charge and energy (HZE) particle exposures are of interest in space radiation protection of astronauts and cosmonauts, and estimating secondary cancer risks for patients undergoing Hadron therapy for primary cancers. The large number of particles types and energies that makeup primary or secondary radiation in HZE particle exposures precludes tumor induction studi...

2017
B. S. Hoppe C. E. Hill-Kayser Y. D. Tseng S. Flampouri H. M. Elmongy O. Cahlon N. P. Mendenhall A. Maity L. A. McGee J. P. Plastaras

Background We investigated early outcomes for patients receiving chemotherapy followed by consolidative proton therapy (PT) for the treatment of Hodgkin lymphoma (HL). Patients and methods From June 2008 through August 2015, 138 patients with HL enrolled on either IRB-approved outcomes tracking protocols or registry studies received consolidative PT. Patients were excluded due to relapsed or ...

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