نتایج جستجو برای: radiation sensitivity

تعداد نتایج: 563390  

Journal: :PLoS Biology 2005
Hemai Parthasarathy

We have made use of gene expression analysis of peripheral blood (PB) mononuclear cells to develop expression profiles that accurately reflect prior radiation exposure. We demonstrate that expression profiles can be developed that not only predict radiation exposure in mice but also distinguish the level of radiation exposure, ranging from 50 cGy to 1,000 cGy. Likewise, a molecular signature of...

2016
Jiří Kudr Zbyněk Heger

2. Ionizing radiation Individual types of IR possess different biological effectiveness. In order to it unit of equivalent dose was defined – 1 Sievert (Sv). Equivalent dose represents absorbed dose multiplied with factor connected with biological effectiveness of IR. More precisely, this factor expresses how many times is precise IR effective than photons of X or gamma radiation (röentgen radi...

Journal: :Cancer research 2005
Sanjay Awasthi Sharad S Singhal Sushma Yadav Jyotsana Singhal Kenneth Drake Aalok Nadkar Ewa Zajac Dilki Wickramarachchi Nancy Rowe Adly Yacoub Paul Boor Seema Dwivedi Paul Dent Wendy E Jarman Berchmans John Yogesh C Awasthi

RLIP76 (RALBP1) is a glutathione-conjugate transporter that is a critical component of clathrin-coated pit-mediated endocytosis, as well as in stress responses. In cultured cells, it provides protection from stressors including heat, oxidant chemicals, chemotherapeutic agents, UV irradiation, and X-irradiation. Here, we show marked reduction in glutathione conjugate transport capacity and stepw...

2017
Peng Jin Carlos M. Duarte Susana Agustí

Ultraviolet-B (UVB) radiation is a global stressor that has profound impacts on freshwater and marine ecosystems. However, an analysis of the patterns of sensitivity to UVB radiation across aquatic photosynthetic organisms has not yet been published. Here, we performed a meta-analysis on results reported in 214 studies compiled from the published literature to quantify and compare the magnitude...

2009
S. O’Keeffe E. Lewis

Poly Methyl MethAcrylate (PMMA) based plastic optical fibres offer a low cost radiation monitoring solution with a wide dose range, capable of providing real-time, online information. The sensitivity of the fibre to ionising radiation is shown to be dependant on wavelength, with the sensitivity increasing with decreasing wavelength, and so by carefully selecting the monitoring wavelength, the d...

Journal: :iranian journal of radiology 0
sima nikneshan department of radiology, school of dentistry, shahid beheshti university of medical sciences, tehran, iran solmaz valizadeh department of radiology, school of dentistry, shahid beheshti university of medical sciences, tehran, iran anahita javanmard dentist, tehran, iran leila alibakhshi department of radiology, school of dentistry, shahid beheshti university of medical sciences, tehran, iran; department of radiology, school of dentistry, shahid beheshti university of medical sciences, tehran, iran. tel: +98-2122907040, fax: +98-2188804037

conclusion considering the similar diagnostic efficacy of all voxel sizes, 300 µm voxel size can be used with adequate efficacy for detection of external root resorption defects with minimal patient radiation dose and the shortest scanning time. background selecting a voxel size that yields minimal radiation dose with no significant compromise of the diagnostic accuracy of cone beam computed to...

بیطرفان رجبی, احمد, جدیدی, مجید, حسن زاده, هادی, دربندی آذر, امیر, رضایی طاویرانی, مصطفی, سمنانی, وحید, معصومی, حامد, نصر, رضا, نیکوفر, علیرضا,

Background and purpose: Among different cancers, breast cancer has a high prevalence among women and radiotherapy is used as a treatment modality in which radio sensitizers are used to increase its efficiency. Nanoparticles are such sensitizers that enhance the efficiency of radiotherapy via creation of free radicals and induction of oxidative stress. This study aimed at evaluating the synergis...

Introduction: Long bone examination in standing position, as one of the diagnostic methods in plain radiography, is most commonly used in the field of medical diagnosis, especially leg length discrepancy. However, with regard to this examination, reproductive organs are exposed to radiation as they are placed in the adjacent area to the long bone. Due to the sensitivit...

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