نتایج جستجو برای: radiation degradation

تعداد نتایج: 386667  

1996

Space Radiation Environment, Essential Basics: Radiation in Space is generated by particles emitted from a variety of sources both within and beyond our solar system. Radiation effects from these particles can not only cause degradation, but can also cause failure of the electronic and electrical systems in space vehicles or satellites. Even high altitude commercial airliners flying polar route...

Javad Hosseini, Reza Moradi,

Background & Aims of the Study: Phenolic compounds have been extensively used in industries for applications such as petrochemical, oil refineries, papers, plastics, steel, pharmaceuticals, textiles, coal conversion, and so on. Specified amounts of Phenolic compounds are lost in the process of their manufacturing and utilization and often cause environmental pollution problems....

2017
Pranathi Meda Krishnamurthy Shirish Shukla Paramita Ray Rohit Mehra Mukesh K Nyati Theodore S Lawrence Dipankar Ray

Early release of tumor necrosis factor-alpha (TNF-α) during radiotherapy of thoracic cancers plays an important role in radiation pneumonitis, whose inhibition may provide lung radioprotection. We previously reported radiation inactivates Tristetraprolin (TTP), a negative regulator of TNF-α synthesis, which correlated with increased TNF-α release. However, the molecular events involved in radia...

Journal: Journal of Nanoanalysis 2016
Giang Li Lnfeng Hu

Carbon nanotube-In2O3 nanocomposites were synthesized by sol-gel method with the help of ultrasonic radiation. The samples were characterized by X-ray diffractometer, transmission electron microscopy and energy dispersive spectrometer. The UV absorbing properties were detected by the UV spectrophotometer. Photo degradation of methylene blue in aqueous solution was investigated by using CNT/In2O...

ژورنال: سنجش و ایمنی پرتو 2020

In this paper, radiation effects in protection layers of logical cell of the digital gate in the FPGA for electron and proton rays was simulated Using the FLUKA Code. by using of the Monte Carlo simulation, the electron and proton transport into the logical cell of the digital gate in the FPGA will be studied. In this simulation, the maximum energy of the electrons and protons at the entrance o...

Ahmad Jonidi Jafari, Ali Khavanin, Ardalan Soleimanian, Babak Eshrati, Hasan Asilian, Jaber Ghrehdaghi, Reza Tajik,

Background: Poly chlorinated biphenyls (PCBs) are a class of chlorinated organic chemicals that do not easily degrade in the environment. This study was conducted to determine the effect of microwave rays, hydrogen peroxide, dioxide titanium and ethanol solvent on the degradation of PCBs. Methods: A 900w domestic MW oven with a fixed frequency of 2450 MHZ was used to provide MW irradiation. R...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2008
Karen A Boehme Roman Kulikov Christine Blattner

The p53 protein is one of the major tumor suppressor proteins. In response to DNA damage, p53 is prevented from degradation and accumulates to high levels. Ionizing radiation leads to hypophosphorylation of the p53 ubiquitin ligase Mdm2 at sites where phosphorylation is critical for p53 degradation and to the phosphorylation and activation of Akt/PKB, a kinase that phosphorylates and inhibits G...

2018
Pranathi Meda Krishnamurthy Shirish Shukla Paramita Ray Rohit Mehra Mukesh K. Nyati Theodore S. Lawrence Dipankar Ray

Early release of tumor necrosis factor-alpha (TNF-α) during radiotherapy of thoracic cancers plays an important role in radiation pneumonitis, whose inhibition may provide lung radioprotection. We previously reported radiation inactivates Tristetraprolin (TTP), a negative regulator of TNF-α synthesis, which correlated with increased TNF-α release. However, the molecular events involved in radia...

2013
James L Rembert Roxana Heitz Adam Hoffman

BACKGROUND Tissue expanders are used in breast reconstruction after mastectomy to stretch the remaining tissue to create space for placement of permanent breast implants. The AeroForm™ Tissue Expander, developed by AirXpanders™ Inc., contains electronic components designed to activate the release of carbon dioxide from an internal reservoir to inflate the expander. Breast cancer patients who un...

اشرفی, داود, بذرافشان, ادریس, خوبی, مهدی, محوی, امیرحسین, ناصری, سیمین, نبی زاده, رامین, کمانی, حسین,

Background and purpose: Sonocatalytic process as an advanced oxidation process is considered for degradation of pollutants in aqueous solution. The aim of this study was to increase the removal of dye by doping of TiO2 with non-metal element such as nitrogen. Materials and methods: Un-doped and N-doped TiO2 nano-particles with different nitrogen contents were synthesized by a simple sol–gel me...

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