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Now showing items 1-10 of 1979
Metallic powder injection molding using low pressure
(Elsevier B.V., 2001-12-03)
The demand by high performance materials that have to support severe service conditions at a reasonable cost has been forcing the powder metallurgy to improve constantly. The most recent and more important innovation in ...
Effect of intracerebroventricular injection of ramipril on the drinking response caused by injection of noradrenaline into the third ventricle
(Associação Brasileira de Divulgação Científica (ABRADIC), 1996-11-01)
We studied the effect of ramipril injected into the third ventricle (3rdV) on the control of water intake induced by injection of noradrenaline into the 3rdV of adult male Holtzman rats (250-300 g) implanted with a chronic ...
Role of nitric oxide and beta-adrenoceptors of the central nervous system on the salivary flow induced by pilocarpine injection into the lateral ventricle
(Elsevier B.V., 2002-05-01)
Our studies have focused on the effect of L-NG-nitroarginine methyl ester (L-NAME), an inhibitor of nitric oxide synthase (NOS), and L-arginine, the substrate of NOS, on salivary secretion induced by the administration of ...
Kinetics of interface state-limited hole injection in alpha-naphthylphenylbiphenyl diamine (alpha-NPD) thin layers
(Elsevier B.V. Sa, 2009-03-01)
Injection-limited operation is identified in thin-film, alpha-NPD-based diodes. A detailed model for the impedance of the injection process is provided which considers the kinetics of filling/releasing of interface states ...
Determination of vanadium in urine by electrothermal atomic absorption spectrometry using hot injection and preconcentration into the graphite tube
(2004-09-01)
In this work it was developed a procedure for the determination of vanadium in urine samples by electrothermal atomic absorption spectrometry using successive injections for preconcentration into a preheated graphite tube. ...
Incidence of rhegmatogenous retinal detachments after intravitreal antivascular endothelial factor injections
(Wiley-Blackwell, 2011-02-01)
Purpose: To determine the incidence of rhegmatogenous retinal detachments (RD) after intravitreal injection in six high-volume centres.Methods: A consecutive, interventional, multicenter case series measured the incidence ...
Flow-injection spectrophotometric determination of methyldopa in pharmaceutical formulations
(Elsevier B.V., 2005-07-15)
A flow-injection spectrophotometric procedure is proposed for methyldopa determination in pharmaceutical preparations. The determination is based on formation of a yellow product (measured at 410 nm) after complexation of ...
Flow-injection spectrophotometric determination of tetracycline and doxycycline in pharmaceutical formulations using chloramine-T as oxidizing agent
(Sociedade Brasileira de Química, 2009-01-01)
A flow-injection (FI) spectrophotometric procedure is proposed for tetracycline (TC) and doxycycline (DXC) determination in pharmaceuticals. The method is based on the reaction of oxidation of these drugs by chloramine-T ...
Sequential injection analysis system with spectrophotometric detection for determination of norfloxacin and ciprofloxacin in pharmaceutical formulations
(Sociedade Brasileira de Química, 2011-01-01)
This work proposes a sequential injection analysis (SIA) system for the spectrophotometric determination of norfloxacin (NOR) and ciprofloxacin (CIP) in pharmaceutical formulations. The methodology was based on the reaction ...
Use of a carbon paste electrode modified with spinel-type manganese oxide as a potentiometric sensor for lithium ions in flow injection analysis
(Wiley-Blackwell, 2004-04-01)
A potentiometric sensor constructed from a mixture of 25% (m/m) spinel-type manganese oxide (lambda-MnO2), 50% (m/m) graphite powder and 25% (m/m) mineral oil is used for the determination of lithium ions in a flow injection ...