نتایج جستجو برای: capture gamma rays

تعداد نتایج: 276802  

Journal: :iranian journal of radiation research 0
h. mozdarani dr. h. mozdarani, department of radiology, school of medical sciences,tarbiat modarres university, p.o.box 14115-111, tehran, iran m. shahidi

background: previous investigations have revealed, cimetidine, a histamine h2-receptor antagonist, show radioprotective effects against gamma- and neutron-induced micronuclei in bone marrow erythrocytes. in this study, the anticlastogenic effects of famotidine and ranitidine, which act similar to cimetidine as histamine h2-receptor antagonists, was investigated. materials and methods : balb/c m...

Journal: :iranian journal of radiation research 0
m. salimi department of genetics, research and science center, azad university and royan institute, tehran, iran h. mozdarani department of medical genetics, school of medical sciences, tarbiat modares university, tehran, iran

background: the present study has been carried out to investigate the effects of preovulatory stage gamma-irradiation of female mice in the absence or presence of vitamin e on numerical chromosome abnormalities in 8-cell embryos after mating with non-irradiated males. materials and methods: the 8-11 weeks adult female nmri mice were whole body irradiated at preovulatory stage (post pmsg injecti...

Journal: :journal of plant molecular breeding 2013
mozhgan abtahi ahmad arzani

mutation induction is considered as an effective way to enrich plant genetic variation, particularly fortraits with a very low level of genetic variation. this research was conducted to assess genetic variationinduced by gamma radiation in m2 and m3 mutant lines of canola (brassica napus l.) by ssr and morphologicalcharacteristics and to identify useful mutants in terms of agronomic traits. six...

Journal: :iranian journal of radiation research 0
m. amiri department of nuclear medicine, babol university of medical sciences, babol, iran r. abdi department of radiology, mazandaran university of medical sciences, sari, iran a. shabestani monfared department of medical physics, babol university of medical sciences, babol, iran

background: the effect of natural background radiation on health is still controversial. however, it is clear that it depends on the dose received by the population. the estimation of external natural background gamma rays received by the population of caspian coastal provinces in the northern part of iran was the main goal of this study. materials and methods: gamma rays was measured using cal...

Alireza Sadremomtaz, Peyvand Taherparvar Sepideh Gholami

Introduction: Neutrons have many applications in various fields, such as medicine. The important application of neutron in medical science is in Boron Neutron Capture Therapy (BNCT). Because of this, determination of neutron dose and flux is critical for the health maintaining of workers and patients exposed to this beam. The neutron radioisotope sources produce gamma rays in ...

Journal: :Radiation protection dosimetry 2012
Praneeth Kandlakunta Lei Cao

Gadolinium is a competent neutron conversion material for neutron detection due to its extremely high neutron capture cross section. It differs from the other neutron reactive materials by emitting large amounts of low-energy electrons for the consequent signal generation in a detector. Such low-energy electrons, though abundant, are prone to be contaminated by internal and/or external gamma ra...

Journal: :iranian journal of radiation research 0
m. shahidi department of biochemistry and biophysics, mazandaran university of medical sciences, sari, iran s. mozdarani hazrat e maryam fertility center, nimeh shaban hospital, sari, iran sh. shammas department of obstetrics and gynecology, alfred krupp hospital, essen, germany

background: quantification of radiation-induced apoptosis in peripheral blood lymphocytes (pbls) has been proposed as a possible screening test for cancer-prone individuals and also for the prediction of normal tissue responses after radiotherapy. materials and methods: the neutral version of the comet assay (single-cell gel electrophoresis) was used 24, 48, 72 hours after irradiation with 8 gy...

Journal: :iranian journal of radiation research 0
sh. shirani school of paramedicine, shahid beheshti university of medical sciences, tehran, iran h. mozdarani department of medical genetics, faculty of medical sciences, tarbiat modares university, tehran, iran a. mahmoodzadeh novin medical radiation institute, tehran, iran m. salimi department of medical genetics, medical biotechnology institute, national institute of genetic engineering and biotechnology, tehran, iran

background: radio-adaptive response and bystander effects are known phenomena occurring in cells following exposure to ionizing radiation (ir). in this study we examined possible radio-adaptation of lymphocytes following bystander effects induced by cho-k1 cells. materials and methods: whole blood and cho-k1 cells were cultured in rpmi-1640 complete medium. cells were separately irradiated with...

Journal: :iranian journal of radiation research 0
m. mahdavi department of radiology, school of paramedical sciences, shiraz university of medical sciences, shiraz, iran h. mozdarani department of medical genetics, school of medical sciences, tarbiat modares university, tehran, iran

background: radioprotective effect of famotidine was previously shown on radiation induced micronuclei and chromosomal aberrations in human peripheral lymphocytes and mouse bone marrow cells however, its radioprotective property has never been studied in mouse spermatogenesis. it was also shown that vitamin c as an antioxidant also exert its radioprotective effect on many biological systems, bu...

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