Berthelot Reaction
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. A compact miniaturized continuous flow system for the determination of urea content in milk.
A multicommutation-based flow system with photometric detection was developed, employing an analytical microsystem constructed with low temperature cofired ceramics (LTCC) technology, a solid-phase reactor containing particles of Canavalia ensiformis DC (urease source) immobilized with glutaraldehyde, and a miniphotometer coupled directly to the microsystem
Analytical & Bioanalytical Chemistry. Publicado em: 2011
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2. Sistema multicomutado de análise em fluxo para determinação de amônio e monocloramina em águas residuais e produtos de desinfecção
A binary sampling flow analysis system equipped with gas diffusion cell was developed for NH4+ and/or NH2Cl determination in wastewater and disinfection products samples based on the Berthelot reaction of the NH2Cl diffused through the semi-permeable PTFE membrane. The effect of the analytical conditions related to the reaction and flow parameters were evalu
Química Nova. Publicado em: 2009
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3. Studies about the loading of monoethanolamine (MEA) onto the non-ionic Amberlite XAD-7 resin for retention of S(IV) species / Estudos da modificação da resina não-iônica Amberlite XAD-7 com monoetanolamina (MEA) para retenção de espécies de S(IV)
A monoetanolamina (MEA) é um composto bifuncional pertencente à classe dos amino-álcoois, muito utilizado em processos industriais envolvendo a remoção de gases ácidos como SO2 , CO2 e H2S. A resina Amberlite XAD-7 é uma resina não-iônica de polaridade intermediária muito utilizada em procedimentos de pré-concentração de compostos orgânicos e �
Publicado em: 2007
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4. Flow analysis and in situ analysis as aproaches to the improvement of the agronomic samples analytical pathway. / Análise em fluxo e análise in situ como estratégias de melhoramento da seqüência analítica de amostras agronômicas.
The present work discusses the use of alternative approaches for the improvement of the agronomic sample analytical pathway. It was focused on the elimination of the sampling step, with the in situ soil analysis, or in the measurement step with the adoption of flow analysis procedures, with the development of two analytical systems. The first one was employe
Publicado em: 2005
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5. Colorimetric determination of serum acid phosphatase activity using adenosine 3′-monophosphate as substrate
The hydrolysis of adenosine 3′-monophosphate by serum acid phosphatase has been coupled to the liberation of ammonia from the adenosine generated through the action of exogenous adenosine deaminase. The ammonia is measured at the end of the incubation by a modification of the phenol-hypochlorite reaction of Berthelot. Optimum conditions for the enzyme reac
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6. APPLICATION OF THE BERTHELOT REACTION FOR RAPID DETECTION OF UREA HYDROLYSIS BY PROTEUS STRAINS
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7. Rapid method for detection of urea hydrolysis by yeasts.
A method is described for the rapid detection of urea hydrolysis by yeasts, using the Berthelot color reaction. The results could be determined within 30 to 50 min with this method, compared with 8 to 72 h usually required with Christensen urea agar.