Y Irradiation
Mostrando 1-12 de 116 artigos, teses e dissertações.
-
1. A RENEWABLE CATALYST FOR A RENEWABLE CHEMICAL: GRAM-SCALE CONVERSION OF FURFURAL TO FURFURYL ALCOHOL BY THE CARROT (Daucus carota)
The bioconversion of furfural to furfuryl alcohol using only carrot bits in water at room temperature and ambient pressure is presented. This reaction led to the bioreduction of furfural with 99% conversion and 99% selectivity to an alcohol. This simple and “fully” green process may represent an alternative to classic hydrogenation processes. Also, witho
Quím. Nova. Publicado em: 2020-01
-
2. Estabilidad de las fases U3Si5, USi2-x y USi2 al incorporar Al en solución. Experiencias de calorimetría diferencial de barrido
ABSTRACT U(Mo) alloys are being studied to be applied as a fuel for research and test reactors. When U(Mo) particles are dispersed in an Al matrix, it is known that an interdiffusion during fabrication process and / or irradiation. In this sense, irradiation tests have shown that this IL has a bad behavior under irradiation coming up the addition of Si to Al
Matéria (Rio J.). Publicado em: 19/07/2018
-
3. Uso combinado de radiación UV-C y biorecubrimiento de quitosán con aceites esenciales para el control de hongos en papaya Maradol
Abstract Anthracnose and soft rot cause deterioration of quality as well as large losses during post-harvest handling of papaya fruits. The single strategies for disease control is little efficient. We analyzed the effect of to integrate control strategies on the incidence of disease caused by the inoculation of spores of the fungi Colletotrichum gloeospori
Rev. Bras. Frutic.. Publicado em: 24/05/2018
-
4. Modificacoes pos-colheita de banana 'prata' y-irradiada.
Avaliou-se o efeito da radiacao y a 0,25 e 0,50 kGy sobre o desenvolvimento da coloracao da casca da banana, a evolucao de etileno e CO2 a conversao de amido em acucares, a relacao polpa/casca, a solubilizacao pectica e as atividades das enzimas relacionadas a degradacao da parede celular, a pectinametilesterase (PMF) e poligalacturonase (PG), na polpa da ba
Pesquisa Agropecuaria Brasileira. Publicado em: 2011
-
5. Effect of electron beam irradiation on mechanical properties of gelatin/Brazil nut shell fiber composites
The use of natural fiber as polymeric matrix reinforcement has attracted interest, as fibers are renewable, of low cost, biodegradable and possesses non-toxic properties. In the present paper, Brazil nuts (Bertholletia excelsa) shell fiber (10% w/w) were mixed with gelatin (25% w/w), glycerin as plasticizer and acrylamide as copolymer to investigate the resu
Matéria (Rio de Janeiro). Publicado em: 2010
-
6. Effect of melatonin and time of administration on irradiation-induced damage to rat testes
The effect of ionizing irradiation on testes and the protective effects of melatonin were investigated by immunohistochemical and electron microscopic methods. Eighty-two adult male Wistar rats were divided into 10 groups. The rats in the irradiated groups were exposed to a sublethal irradiation dose of 8 Gy, either to the total body or abdominopelvic region
Brazilian Journal of Medical and Biological Research. Publicado em: 2009-07
-
7. Avaliação da resposta fotodinâmica em fígado normal de ratos utilizando fonte de luz pulsada no regime de femtossegundos / Evaluation of photodynamic response in normal rat liver using a femtosecond regime pulsed irradiation
A terapia fotodinâmica (TFD) é uma promissora técnica para o tratamento de câncer e de outras patologias. O tratamento baseia-se na ação de uma fonte de luz com o agente fotossensibilizador (FS) e o oxigênio molecular presente nas células, gerando espécies reativas de oxigênio que causam a morte celular. Uma das limitações atuais da técnica é a
Publicado em: 2009
-
8. Luminescence and paramagnetic centers in antigorite and Lizardite, two menbers of serpentine group: a comparative study / Estudo comparativo entre as propriedades dos centros luminescentes e paramagnéticos da antigorita e da lizardita do grupo da SERPENTINA: `Mg IND.3´[Si IND.2´`O IND.5´]`(OH) IND.4´
In this work, we are describing crystals luminescent properties of Antigorite (monoclinic, Mg3-x[Si2O5](OH)4-2x) and Lizardite (triclinic, Mg3[(Si,Fe)2O5](OH)4). They were studied simultaneously applying several techniques, like: Thermoluminescence (TL), Optical Absorption (OA), Electron Paramagnetic Resonance (EPR), X-rays diffraction and Inductively Couple
Publicado em: 2008
-
9. Melatonin prevents inflammation and oxidative stress caused by abdominopelvic and total body irradiation of rat small intestine
We investigated the day-night differences in intestinal oxidative-injury and the inflammatory response following total body (TB) or abdominopelvic (AP) irradiation, and the influence of melatonin administration on tissue injury induced by radiation. Rats (male Wistar, weighing 220-280 g) in the irradiated groups were exposed to a dose of 8 Gy to the TB or AP
Brazilian Journal of Medical and Biological Research. Publicado em: 31/07/2007
-
10. Métodos combinados para preservar a qualidade pós-colheita do mamão Goldentipo exportação / Hurdle technology to preserve the Goldenpapaya postharvest quality
With the purpose of evaluating a combination of postharvest techniques on papaya Golden storage, the following treatments were investigated: carton boxes packaging (CP); CP + plastic bag of PEBD - low density polyethylene film, with 0.05mm of thickness (PE); CP + PEBD with 0.025mm of thickness impregnated with mineral ethylene scavenger (PEAbs); y-irradiatio
Publicado em: 2007
-
11. An extract of Polygonum multiflorum protects against free radical damage induced by ultraviolet B irradiation of the skin
Over the last decades, the incidence of ultraviolet B (UVB)-related skin problems has been increasing. Damages induced by UVB radiation are related to mutations that occur as a result of direct DNA damage and/or the production of reactive oxygen species. We investigated the anti-oxidant effects of a Polygonum multiflorum thumb extract against skin damage ind
Brazilian Journal of Medical and Biological Research. Publicado em: 2006-09
-
12. ENTRE LA COUR ET LA VILLE: LE RIO DE JANEIRO AU TEMPS DU ROI (1808-1821) / ENTRE A CORTE E A CIDADE: O RIO DE JANEIRO NO TEMPO DO REI (1808-1821)
L`installation de la cour de D. João à Rio de Janeiro, en 1808, et le changement de la capitale de la colonie pour la nouvelle condition de siège de l`Empire Portugais, déclencha une série de transformations tant sur son espace urbain quant sur le comportement de ses habitants, lesquels depuis ce moment, durent réfléchir, le niveau de la Civilisation
Publicado em: 2006