Gamma Irradiation
Mostrando 13-24 de 477 artigos, teses e dissertações.
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13. FTIR study of aquamarines after gamma irradiation, heat treatment and electrodiffusion
Abstract Beryl, Be3Al2(SiO3)6, is a natural gemstone with many colors. Some of these colors can be induced or modified by exposure to ionizing radiation, by heating, and maybe by electrodiffusion. Small contents of chromophore chemical elements are related to the colors of beryl, like iron, chromium, vanadium, manganese, and others. There is great interest i
REM, Int. Eng. J.. Publicado em: 2017-09
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14. The Evolving Role of Erythropoietin in Lung of Irradiated Rats
ABSTRACT The aim of the present study is to evaluate the possible curative effect of erythropoietin (EPO) on radiation-induced damage to the lung and its renin angiotensin system. EPO (200 U/100g) was i.p. injected to male rats one hour post 6 Gy whole body gamma irradiation. The animals were sacrificed after 14 days post irradiation. Irradiation induced sig
Braz. arch. biol. technol.. Publicado em: 17/08/2017
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15. Effect of Gamma Radiation on Growth and Metabolic Activities of Arthrospira platensis
This work aimed to study the influence of gamma radiation on the growth and production of some active substances of Arthrospira platensis. Biomass production was significantly inhibited (p ≤ 0.05) by 21 and 34%, with respect to the control at 2.0 and 2.5 kGy, respectively. Chlorophyll-a content showed 11% reduction at 2.5 kGy compared to the control. As a
Braz. arch. biol. technol.. Publicado em: 29/04/2016
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16. FTIR Spectroscopy Revealing the Effects of Laser and Ionizing Radiation on Biological Hard Tissues
This work evaluated the influence of ionizing and non-ionizing irradiations on the chemical structure of hard tissues using the mid-infrared spectroscopy. Enamel, dentin and bone slabs were submitted to gamma irradiation, as well as to Nd:YAG (λ = 1064 nm) and Er,Cr:YSGG (λ = 2078 nm) laser irradiations. The composition of slabs were evaluated by the Fouri
J. Braz. Chem. Soc.. Publicado em: 2015-12
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17. Stibnite Nanoparticles as a New Stabilizer for Poly (Methyl Methacrylate) Exposed to Gamma Irradiation
AbstractPoly (methyl methacrylate), PMMA, may be used in manufacturing of devices, which are exposed to gamma irradiation. However, the polymer undergoes significant changes in its properties during process and the use of additives is a common form to stabilize the PMMA matrix. In this way, stibnite was synthesized by sonochemical method and the amorphous po
Mat. Res.. Publicado em: 2015-10
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18. New insights into the structural characteristics of irradiated crotamine
Abstract Background: Since ionizing radiation has the potential to alter the molecular structure and affect the biologica properties of biomolecules, it has been successfully employed to attenuate animal toxins. The present study aimed to characterize the structural modifications on irradiated crotamine, a toxin from
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 11/08/2015
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19. Are bovine teeth a suitable substitute for human teeth in in vitro studies to assess endotoxin load in root canals?
The present study aimed to determine the feasibility of using bovine teeth as a suitable alternative for human teeth, in experiments involving in vitro endotoxin contamination. Twenty bovine central incisors and 20 human single-root premolars had their dental crowns removed and root lengths set at 16 mm. Root canals were prepared up to #60 K-file size and st
Braz. oral res.. Publicado em: 03/07/2015
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20. Long-term correlation of the electrocorticogram as a bioindicator of brain exposure to ionizing radiation
Understanding the effects of radiation and its possible influence on the nervous system are of great clinical interest. However, there have been few electrophysiological studies on brain activity after exposure to ionizing radiation (IR). A new methodological approach regarding the assessment of the possible effects of IR on brain activity is the use of line
Braz J Med Biol Res. Publicado em: 12/06/2015
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21. Use of Lead (II) Sulfide Nanoparticles as Stabilizer for PMMA Exposed to Gamma Irradiation
Lead (II) sulfide (PbS) were synthesized by sonochemical method and crystals with cubic structure exhibit aggregated nanoparticles with size in the range of 50-100 nm. Commercial Poly(methyl methacrylate) (PMMA) containing the PbS nanoparticles (PbS-NP) exposed to gamma irradiation were investigated and both the viscosity-average molar mass (Mv) and degradat
Mat. Res.. Publicado em: 2015-04
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22. Antifungal effect of electrospun nanofibers containing cetylpyridinium chloride against Candida albicans
It is known that cetylpyridinium chloride (CPC) has in vitro and in vivo antifungal action against Candida albicans, with advantages over other common antiseptics. A CPC delivery-controlled system, transported in polymer nanofibers (PVP/PMMA), was developed to increase the bioavailability of the drug in contact with the oral mucosa. The objectives of this st
Braz. oral res.. Publicado em: 15/09/2014
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23. Effect of gamma irradiation on the nutritional quality of Agaricus bisporus strains cultivated in different composts
O efeito de doses de irradiação (0, 125, 250 e 500 Gy) na qualidade nutricional de cogumelos A. bisporus(linhagens ABI-07/06, ABI-05/03 e PB-1) cultivados em compostos à base de palha de aveia (Avena sativa) e braquiária (Brachiariasp.) foi avaliado. O delineamento experimental foi em esquema fatorial 4 x 3 x 2 (doses de irradiação x linhagens x compos
An. Acad. Bras. Ciênc.. Publicado em: 14/05/2014
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24. SCS118 Marques - New rice cultivar obtained through induced mutation
The new rice cultivar, SCS118 Marques, was obtained through gamma irradiation of SCSBRS Tio Taka cultivar. SCS118 Marques presents modern architecture, lodging resistance, late maturity cycle, moderate resistance to blast, high yield potential, long grains and very high cooking quality. Industrial tests performed with SCS118 Marques showed that grains are su
Crop Breed. Appl. Biotechnol.. Publicado em: 2014-03