Consulta: subjectFacets:"Titration"
Registros recuperados: 3
Data/hora: 09/06/2024 08:27:12

Analyse bacteriologique de l'eau par mesure potentiometrique de la reduction de l'acide lipoique
Provedor de dados: 5
Autores: Charriere, G; Jouenne, T; Junter, G.
A simple potentiometric technique to detect and enumerate the bio-indicators of water contamination is described. The technique consists in measuring the redox potential of a specific culture medium saturated with oxygen where bacteria are incubated in presence of lipoic acid (LA). These micro-organisms reduce LA to dihydrolipoic acid, giving rise to an important potential drop in the system. This potentiometric "signal" reveals the presence of active metabolic bacteria in the medium. The major assets of potentiometric measurements in presence of LA lies in the reliability and intelligibility of the results (the redox phenomenon being qualitatively and quantitatively studied), associated to a very simple technology. Futhermore, this technique is perfectly...
Tipo: Text
Palavras-chave: Bacteria; Pollution indicators; Water quality; Microbial contamination; Indicator species; Pollution detection; Redox potential; Titration.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-1007.pdf

An improved method for measuring soil microbial activity by gas phase flow injection analysis
Provedor de dados: 90
Autores: Doran,Gregory; Zander,Alek.
The rate of carbon dioxide production is commonly used as a measure of microbial activity in the soil. The traditional method of CO2 determination involves trapping CO2 in an alkali solution and then determining CO2 concentration indirectly by titration of the remaining alkali in the solution. This method is still commonly employed in laboratories throughout the world due to its relative simplicity and the fact that it does not require expensive, specific equipment. However, there are several drawbacks: the method is time-consuming, requires large amounts of chemicals and the consistency of results depends on the operator's skills. With this in mind, an improved method was developed to analyze CO2 captured in alkali traps, which is cheap and relatively...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: CO2; Microbial respiration; Titration; Infrared; FIA.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000200004

Glycogen Determination in Bovine Muscle: A Proposal for Rapid Determination
Provedor de dados: 117
Autores: Hargreaves B,Antonio; Barrales V,Luis; Barrales Z,Daniela; Riveros F,José Luis; Peña R,Iván.
A practical, rapid and inexpensive method for muscle glucose determination is proposed. The method is based on acid digestion of the sample, followed by neutralization of the solution and the subsequent glucose determination using a domestic glucometer for human blood glucose level control. In a pre-experimental phase, the accuracy of this methodology and the titration method was determined, comparing results to pre-established glucose concentrations. There were significant differences between the glucose reading given by the glucometer and the pre-established glucose concentrations and the results given by the titration method. Nevertheless, when discrepancies (bias) were identified, differences resulted non-significant (P = 0.85). Subsequently, muscle...
Tipo: Journal article
Palavras-chave: Muscle; Glucose; Glycogen; Titration; Glycolytic potential.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392009000300009