Methylene Chloride
Mostrando 1-12 de 65 artigos, teses e dissertações.
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1. EXPERIMENTAL STUDY OF THE NEUROTOXIC EFFECTS OF PHOTODYNAMIC THERAPY ON THE SPINAL CORD
RESUMO Objetivo Avaliar os efeitos da terapia fotodinâmica (PDT) na dura-máter usando os fotossensibilizadores cloreto de alumínio ftalocianina e azul de metileno em ensaios in vivo. Métodos Cinquenta e seis ratos Wistar machos divididos em dois grupos; um submetido à PDT e o outro submetido aos fotossensibilizadores sem a fotoativação (controle). O
Coluna/Columna. Publicado em: 02/09/2019
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2. Evaluation of antimicrobial activity of extracts of Tibouchina candolleana (melastomataceae), isolated compounds and semi-synthetic derivatives against endodontic bacteria
This work describes the phytochemical study of the extracts from aerial parts of Tibouchina candolleana as well as the evaluation of the antimicrobial activity of extracts, isolated compounds, and semi-synthetic derivatives of ursolic acid against endodontic bacteria. HRGC analysis of the n-hexane extract of T. candolleana allowed identification of b-amyrin,
Brazilian Journal of Microbiology. Publicado em: 2012-06
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3. Produção e caracterização de carvão ativado produzido a partir do defeito preto, verde, ardido (PVA) do café
The black, green and sour coffee defect (PVA) contributes with 20% of the total coffee production. It should be separate from the normal coffee grains in order to improve the final quality of the beverage. In this way, the present work has the objective to use the PVA reject for the production of activated carbon. The activated carbon (CA) was prepared from
Química Nova. Publicado em: 2009
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4. Development platform functionalized with poly(4-HBA) for use in biological sensors / Desenvolvimento de plataforma funcionalizada com poli(4-HBA) para aplicação em sensores biológicos
In this work, the 4-hidroxtbenzoic acid electropolymerization was investigated aiming at its application as functionalized platform in biomolecule immobilization in order to develop biological sensors. The material was adsorbed over graphite electrode and electrochemically characterized by cyclic voltammetry and electrochemical impedance spectroscopy. This a
Publicado em: 2009
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5. Synthesis and structural analysis of Urânium and Vanadium whit piridoxine derivated ligands. / Síntese e análise estrutural de complexos de Urânio e Vanádio com ligantes derivados da piridoxina.
Uranyl and vanadyl complexes with ligands with oxygen and nitrogen donors atoms have been extensively reviewed and aroused remarkable interest on account their high stability but, a few complexes of piridoxine derived ligands have been reported in the literature. This lack was the inspiration to search new piridoxine derived ligands and uranyl and vanadyl co
Publicado em: 2009
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6. Preparação de carvão ativado em baixas temperaturas de carbonização a partir de rejeitos de café: utilização de FeCl3 como agente ativante
Ferric chloride as a new activating agent was used to obtain activated carbons from agroindustrial waste. This material was prepared at three temperatures of pyrolysis, 200, 280 and 400 ºC. The carbonaceous materials obtained after the activation processes showed high specific surface areas (BET), with values higher than 900 m² g-1. The materials showed di
Química Nova. Publicado em: 2008
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7. UtilizaÃÃo de fibras de piaÃava (Attalea funifera) na preparaÃÃo de carvÃes ativados. / Utilization of piassava fibers (Attalea funifera) for activated carbons preparation.
The piassava fibers, piassava broom production waste, were used as a precursor to prepare activated carbons. The activated carbons were prepared by chemical activation with zinc chloride, phosphoric acid and iron chloride and by physical activation with carbon dioxide and water steam. The resulting activated carbons were characterized by N2 adsorption/desorp
Publicado em: 2008
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8. Preparation and application of activated carbon and iron oxide prepared from PVA coffee defect in the removal of pollutants in aqueous medium / PreparaÃÃo e aplicaÃÃo de compÃsitos de carvÃo ativado e Ãxido de ferro preparados a partir do defeito PVA do cafà na remoÃÃo de poluentes do meio aquoso.
The black, green and sour (PVA) coffee defect contribute with ca. 20% of the total coffee production. It should be separate from the normal coffee grains in order to improve the final quality of the beverage. In this way, the present work has the objective to use this reject for the production of adsorbents and materials with catalytic properties for using i
Publicado em: 2008
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9. Caracterização parcial das reações de fotooxidação e eletrooxidação do dipiridamol e das subunidades de hemoglobina extracelular / Partial caracterization of dipydidamole fotooxidation and eletrooxidation reactions and partial caracterization of extracellular hemoglobin subunits
Dipyridamole (DIP), 2,6-bis(dietanolamina)-4,8-dipiperidinapirimida-[5,4-d] pirimidina) is known for its vasodilating and antiplatelet aggregation activity, exhibiting also a potent antioxidant effect, strongly inhibiting lipid peroxidation. In the present work, the quenching of singlet molecular oxygen, O2(1Δg), by dipyridamole, RA47 and RA25 was anal
Publicado em: 2008
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10. Um novo método para quantificar mercúrio orgânico (Hg orgânico) empregando a espectrometria de fluorescência atômica do vapor frio
In this work a simple and sensitive procedure to extract organic mercury from water and sediment samples, using methylene chloride in acidic media followed by CVAFS quantification has been developed. The method was evaluated for possible interferents, using different inorganic mercury species and humic acid, no effects being observed. The detection limit for
Química Nova. Publicado em: 2006-12
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11. O emprego de quitosana quimicamente modificada com anidrido succínico na adsorção de azul de metileno
The adsorption capacity of alpha-chitosan and its modified form with succinic anhydride was compared with the traditional adsorbent active carbon by using the dye methylene blue, employed in the textile industry. The isotherms for both biopolymers were classified as SSA systems in the Giles model, more specifically in L class and subgroup 3. The dye concentr
Química Nova. Publicado em: 2006-06
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12. PRECONDITIONING OF ORGAN DONORS WITH LOW LEVELS OF CARBON MONOXIDE REDUCES GRAFT IMMUNOGENICITY AND IMPROVES LONGTERM ALLOGRAFT FUNCTION
Background: Chronic rejection remains the major obstacle for successful transplantation, and to date there is no effective treatment. Events occurring prior to organ transplantation such as brain death, harvesting procedure, and ischemia-reperfusion injury lead to unspecific inflammatory damages danger signals - that increase graft immunogenicity and reduce
Publicado em: 2005