Photoxidation
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. Avaliacao da qualidade de oleos vegetais sob estresse fotoxidativo e termoxidativo por espectroscopia de UV e RMN e H
Neste trabalho foram avaliados os efeitos da fotoxidação e termoxidação na estabilidade dos óleos de soja, milho, canola e girassol, por técnicas titulométricas e espectroscópicas. As amostras foram submetidas ao oven test (63C 45 dias) e à fotoxidação (temperatura ambiente 4000 lux 60 dias). Foram avaliados também os efeitos da adição de antio
Publicado em: 2008
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2. Modification and immobilization of TiO2 aiming the degradation of organic pollutant compounds by heterogeneous photocatalysis process / Modificação e imobilização de TiO2 visando a degradação de compostos orgânicos poluentes via o processo de fotocatálise heterogênea
The main goal of this work was to find alternatives capable to promote an improvement in terms of applicability of the heterogeneous photocatalysis process, in order to make it feasible in large scale. The use of the photocatalyst TiO2 immobilized and also modificated with adsorbent materials was evaluated. The heterogeneous photocatalysis process, either us
Publicado em: 2007
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3. Eficencia fotodinamica das protoporfirinas IX de magnesio e zinco
The photodynamic efficiency of protoporphyrin IX (PpIX) and its magnesium (MgPpIX) and zinc (ZnPpIX) derivatives were investigated by comparing the rate of tryptophan (Trp), bovine albumin (BSA) and erythrocytes photoxidation. The solutions of the biomolecules were irradiated with a mercury lamp, for a maximum period of 120 minutes and their photoxidations w
Publicado em: 2003
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4. Polissilanos e polissilanos ramificados
The polysilynes (SiPh)m, the linear polysilane (SiPhMe)n and the branched polysilanes [(SiPh)m(SiPhMe)n], [(SiPh)m(SiMe2)n], [(SiEt)m(SiPh2)n] and [(Sic-hex)m(SiPh2)n], with m/n ranging from 0,50/0,50 to 1,0/0,0, were synthesized in good yields from the sodium/toluene reductive coupling of the appropriate organochlorosilanes. The materiais were characterized
Publicado em: 1998
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5. Propriedades fisico-quimicas de cabelos : avaliação de interações com corante e surfactantes
The human being give great importance to their hair, which is confirmed by the large variety of cometic and pharmaceutic products whose functions cover from mere cleaning torestoration attempts for damaged, falling hair, baldness and several other illnesses. This work has been directed toward the utilization of well-known techniques of evaluation of tlhe eff
Publicado em: 1989
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6. Reversal of Copper Inhibition in Chloroplast Reactions by Manganese 1
In the Mehler reaction, a Hill reaction utilizing molecular oxygen as the electron acceptor, rates of net oxygen uptake are stimulated by added manganous ions. Both whole cell photosynthesis and the Mehler reaction are inhibited by copper. Copper inhibition of the Mehler reaction can be reversed by manganese salts. Glutathione. which alone has no effect on M