poly n-isopropylacrylamide was successfully grafted onto a polystyrene cell culture dish by gamma ray. in this study, the effect of a radiation dose (radiation absorbed dosages of 10, 20, 30, 40 kgy) under appropriate temperature and grafting conditions was investigated. the ftir analysis showed the existence of the graft pnipaam on the substrate. the optimal value of the dose for grafting was ...

Background: Prompt gamma neutron activation analysis (PGNAA) is known as a non-invasive technique capable of measuring elemental concentration in voluminous samples in a short period of time. Also it is a valuable diagnostic tool for total body elemental measurements. 252Cf and 241Am-Be sources which are usually used in this method, generate not only neutrons, but also emit high-energy and unwa...

this research was performed to compare electron beam (eb) and gamma ray (gr) treatments at doses of 25, 50 and 75 kilo gray (kgy) on ruminal degradation kinetics and in vitro digestibility of sunflower meal (sfm). ionizing radiations of eb and gr had significant effects )p

the purpose of the research was determine the effects of gamma ray on seed germination, seedling height and root length of rice (oryza sativa l. spp. indica cv. mr219) to identify the lethal dosage of the radiation. paddy seeds of mr219 were exposed to different doses of gamma radiations viz 50,100,150,200,250,300,350,400,450,500,600,700,800,900 and 1000 gy using 60co as the radiation source. t...

naturally occurring radionuclides have different amount of activity concentration for 226 ra, 232 th and 40 k in building materials. in this study, natural radioactivity has been measured for bricks used in tehran. for this work, 9 samples of three types of bricks, clay brick (cb), making the facade brick (mfb) and firebrick (fb) has been selected from different regions and factories in tehran....

The future space-based GAMMA-400 gamma-ray telescope will operate onboard the Russian astrophysical observatory in a highly elliptic orbit during 7 years to observe Galactic plane, Center, Fermi Bubbles, Crab, Vela, Cygnus X, Geminga, Sun, and other regions measure gamma- cosmic-ray fluxes. Observations be performed point-source mode continuously for long time (~100 days). gamma rays energy ran...