نتایج جستجو برای: background radiations

تعداد نتایج: 839529  

Journal: :Dose-response : a publication of International Hormesis Society 2006
Bobby R Scott Jennifer Di Palma

Routine diagnostic X-rays (e.g., chest X-rays, mammograms, computed tomography scans) and routine diagnostic nuclear medicine procedures using sparsely ionizing radiation forms (e.g., beta and gamma radiations) stimulate the removal of precancerous neo-plastically transformed and other genomically unstable cells from the body (medical radiation hormesis). The indicated radiation hormesis arises...

Journal: :PLoS ONE 2008
Julia J. Day James A. Cotton Timothy G. Barraclough

BACKGROUND Understanding the causes of disparities in species diversity across taxonomic groups and regions is a fundamental aim in evolutionary biology. Addressing these questions is difficult because of the need for densely sampled phylogenies and suitable empirical systems. METHODOLOGY/PRINCIPAL FINDINGS Here we investigate the cichlid fish radiation of Lake Tanganyika and show that per li...

Journal: :PLoS ONE 2006
Maxim V. Kapralov Dmitry A. Filatov

BACKGROUND "Explosive" adaptive radiations on islands remain one of the most puzzling evolutionary phenomena. The rate of phenotypic and ecological adaptations is extremely fast during such events, suggesting that many genes may be under fairly strong selection. However, no evidence for adaptation at the level of protein coding genes was found, so it has been suggested that selection may work m...

Journal: :iranian journal of radiation research 0
m.m.a. mamun department of biotechnology and genetic engineering, islamic university, kushtia‐7003, bangladesh

background: the earlier atomic bomb explosion in hiroshima and nagasaki, and three worth mentioning nuclear accidents - detonation at fukushima daiichi nuclear plant, chernobyl nuclear fallout and an accident at three mile island nuclear power plant have made us more worried about the secure exploitation of nuclear energy. the central focus of this paper is to review radiation-mediated health e...

2017
Samina T. Yousuf Azeemi Saleem Farooq Shaukat Khawaja Shamsuddin Azeemi Idrees Khan Khalid Mahmood Farah Naz

BACKGROUND Escherichia coli is the agent responsible for a range of clinical diseases. With emerging antimicrobial resistance, other treatment options including solar/photo-therapy are becoming increasingly common. Visible Range Radiation Therapy/Colour Therapy is an emerging technique in the field of energy/vibrational medicine that uses visible spectrum of Electromagnetic Radiations to cure d...

2008
Anand Raman

Gas Flow Proportional Counters (GFPC) have been developed indigenously for various radiation protection applications. These detectors can be fabricated for 2” diameter filter paper sample counting applications to large area (~1500 cm) detectors for surface contamination applications. Thin entrance windows allow nonpenetrating type of radiations like alpha and low energy beta particles. Efficien...

Journal: :Proceedings. Biological sciences 2012
Lauren Cole Sallan Matt Friedman

Adaptive radiations, bouts of morphological divergence coupled with taxonomic proliferation, underpin biodiversity. The most widespread model of radiations assumes a single round, or 'early burst', of elevated phenotypic divergence followed by a decline in rates of change or even stasis. A vertebrate-specific model proposes separate stages: initial divergence in postcranial traits related to ha...

2014
Deanne K. Thompson Dolly Thai Claire E. Kelly Alexander Leemans Jacques-Donald Tournier Michael J. Kean Katherine J. Lee Terrie E. Inder Lex W. Doyle Peter J. Anderson Rodney W. Hunt

Children born very preterm (VPT) are at risk for visual impairments, the main risk factors being retinopathy of prematurity and cerebral white matter injury, however these only partially account for visual impairments in VPT children. This study aimed to compare optic radiation microstructure and volume between VPT and term-born children, and to investigate associations between 1) perinatal var...

Journal: :Journal of Nuclear Technologyin Applied Science (JNTAS) (Print) 2021

Ionizing radiations resulting from radioactive materials have widely uses in many applications various

2015
Evan P. Economo Pavel Klimov Eli M. Sarnat Benoit Guénard Michael D. Weiser Beatrice Lecroq L. Lacey Knowles

Adaptive radiations are of particular interest owing to what they reveal about the ecological and evolutionary regulation of biodiversity. This applies to localized island radiations such as Darwin's finches, and also to rapid radiations occurring on a global scale. Here we analyse the macroevolution and macroecology of Pheidole, a famously hyperdiverse and ecologically dominant ant genus. We g...

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