Volume 9, Issue 1, 1991

15th January, 2023

A Cholesterol Biosensor

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by Ana Maria Oliveira Brett, M. Helena Gil, A. Paula Piedade

7-10

DOI: DOI: 10.4152/pea.199101007

Current/Potential Studies on Tetraheme Cytochromes C3.

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by C. Moreno, A. Campos, M. Teixeira et al.

11-14

DOI: DOI: 10.4152/pea.199101011

Reaction of Pyridoxal and Pyridoxal 5-Phosphate with Hexylamine. Comparative Electrochemical and Spectrophotometric Studies

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by T. Pineda, M. Blázquez, J. M. Sevilla et al.

15-18

DOI: DOI: 10.4152/pea.199101015

The Effect of Ta Ion Implantation on the Aqueous Corrosion Resistance of M50 Bearing Steel

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by C M. Rangel, M. H. Simplício, A. C. Consiglieri

19-22

DOI: DOI: 10.4152/pea.199101019

Corrosion Products of Low Alloy Steel under Wet-Dry Cycling Conditions

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by J. Davalos, J. F. Marco, M. Gracia et al.

23-26

DOI: DOI: 10.4152/pea.199101023

Influence of Imidazoles in the Deposition Velocity of Copper on non Conductors by Electroless

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by M. M. Dávila, C. Martinez, H. Scholl et al.

27-30

DOI: DOI: 10.4152/pea.199101027

Modificações na Superfície do Eléctrodo de Irídio Induzidas por Polarização Electroquímica

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by M.Teresa S. Portela, M. Irene S. Lopes, Inês T.E. Fonseca

31-34

DOI: DOI: 10.4152/pea.199101031

Influence of «Pseudomonas Aeruginosa» on the Pitting Corrosion of a 18/8 Stainless Steel in Phosphate Borate in the Presence of NaCl. I - Chloride Anions Action

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by P. Esparza, J. Morales, M. P. Arevalo et al.

35-38

DOI: DOI: 10.4152/pea.199101035

Influence of «Pseudomonas Aeruginosa» on the Pitting Corrosion of a 18/8 Stainless Steel in Phosphate Borate in the Presence of NaCl. II - Microbiologically Influence Corrosion

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by J. Morales, P. Esparza, M. P. Arevalo

39-42

DOI: DOI: 10.4152/pea.199101039

The Corrosion and Passivity of Copper in Aqueous Solutions Containing Sodium Perchlorate

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by R. M. Souto, M. Pérez Sánchez, M. Barrera et al.

43-47

DOI: DOI: 10.4152/pea.199101043

Plasma Sprayed Ceramic Coatings on St 37 Steel Substrates

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by V. Costa, C. M. Rangel, L. F. Cruz et al.

49-53

DOI: DOI: 10.4152/pea.199101049

Estúdio del Proceso de Electrodeposición de Piorno en los Banos PbCl2-xNaCl Fundidos

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by Y. Castrillejo, S. Palmero, M. L. Matía et al.

55-58

DOI: DOI: 10.4152/pea.199101055

Informação sobre a Natureza das Estruturas Coordenadoras dos Ácidos Fúlvicos Obtida por Comparação de Curvas de Titulação na Presença de Catiões Metálicos com Curvas Simuladas para Modelos

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by Adélio A. S. C. Machado, Joaquim C. G. Esteves da Silva

59-63

DOI: DOI: 10.4152/pea.199101059

Cathodic Stripping Voltammetry at a Hanging Mercury Drop Electrode: Use of Polyaminoacid Films, Copper (II), Derivatization of Large Molecules and Sample Cleanup

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by Arnold G. Fogg, Josino C. Moreira, F. Nil Ertas

65-70

DOI: DOI: 10.4152/pea.199101065

Adsorptive Stripping Voltammetry: Adsorption of Dioxime Ligands and Cobalt and Nickel Complexes at Mercury Thin-Film Electrodes

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by Christopher M. A. Brett, Ana Maria Oliveira Brett, Jorge L. C. Pereira

71-74

DOI: DOI: 10.4152/pea.199101071

Estúdio Voltamperometrico de los Complejos Cd-Ligandos Inorgânicos a Bajas Concentraciones

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by E. Barrado, R. Pardo, M. Herguedas et al.

75-78

DOI: DOI: 10.4152/pea.199101075

Interaction of 6-Aminopurine (Adenine) and of 6-Dimetylaminopurine with Copper Ions in Aqueous Medium. Formation of Cu(I) Complexes

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by J. E. Simão, H. M. Tavares

79-83

DOI: DOI: 10.4152/pea.199101079

Optimização de Eléctrodos Sanduíche para FIA

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by Júlia M. C. S. Magalhães, Adélio A. S. C. Machado

85-88

DOI: DOI: 10.4152/pea.199101085

Realização de uma Interface Microbalança-Microcomputador

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by Luís Filipe B. Ribeiro, Carlos Alberto B. Silva, Maria Teresa S. R. Gomes et al.

89-92

DOI: DOI: 10.4152/pea.199101089

Determinación de Parametros Cinéticos de Reacciones Electródicas Casi-Reversibles con Forma Reducida Soluble en Disolución, Mediante Métodos de la Electroquímica Semi-Integral (III)

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by M. Barrera, M. Pérez Sánchez, L. Fernández Mérida

93-97

DOI: DOI: 10.4152/pea.199101093

Determination of Residual Styrene in Polystyrene Using Microelectrodes

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by M. D. Geraldo, M. I. Montenegro

99-103

DOI: DOI: 10.4152/pea.199101099

Uncertainty Introduced by Extrapolation in the Conventional Assignment of Reference pH Values

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by M. J. Guiomar, H. M. Lito, M. Filomena G. F. C. Camões

105-112

DOI: DOI: 10.4152/pea.199101105

Anodic Oxidation of DMAB and Influence of Additives in Electroless Plating

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by A. P. Ricardo, L. M. Abrantes

113-116

DOI: DOI: 10.4152/pea.199101113

Oxime-Imine Reduction in the Liquid-Gas Interface in Fast Atom Bombardment Mass Spectrometry: an Electrochemical Analogy

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by M. Graça O. Santana-Marques, António. J. V. Ferrer-Correia, Michael L. Gross

117-120

DOI: DOI: 10.4152/pea.199101117

Adsorption and Electrochemical Activity of Imidazole Derivative on Pt/Pt, Au and Hg Electrodes

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by M. M. Dávila, M. P. Elizalde, T. D. Gladysheva et al.

121-124

DOI: DOI: 10.4152/pea.199101121

An Electrochemical Approach to the Study of Dynamic Processes at the Insulator/Liquid Interface

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by R. G. Compton, C. A. Brown and C. A. Narramore

125-128

DOI: DOI: 10.4152/pea.199101125

Electrochemical Oxidation of Biscyclopentadie-nylmolybdenum Complexes. Effect of Coordinated Amidines

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by A. M. Fonseca, M. A. Queirós, A. R. DIAS

129-134

DOI: DOI: 10.4152/pea.199101129

Wittig Type Reactions Induced by Electrogenerated Bases

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by A. P. Bettencourt, A. P. Esteves, A. M. Freitas et al.

135-139

DOI: DOI: 10.4152/pea.199101135

Electrosynthesis of Diarylacetilenes

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by Carmen Polo, M. Gloria Quintanilla, Fructuoso Barba

141-144

DOI: DOI: 10.4152/pea.199101141

Contributions to the Formation Mechanism of 2,4-Diaryl Furanes and Electrosynthesis of 2-Aryl-4-Methy 1-Furans

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by F. Barba, J. L. de la Fuente

145-148

DOI: DOI: 10.4152/pea.199101145

Electrogeneration of N,O-Diaroyl-N-Arylhy-droxylamines as Precursor of Aromatic Amides

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by Fructuoso Barba, Jose I. Lozano, Jose Escudero

149-151

DOI: DOI: 10.4152/pea.199101149

Cathodic Reduction of a-Halocarbonilic Compounds in the Presence of Apparently non-Reactive Substances

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by G. Montero, G. Quintanilla, F. Barba

153-158

DOI: DOI: 10.4152/pea.199101153

Complexation of Electrochemically Reduced Crown Ethers Incorporating Anthraquinone Nuclei with Alkali Metal Ions

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by J. M. Caridade Costa, B. Jeyashri, D. Bethell

157-161

DOI: DOI: 10.4152/pea.199101157

Ellipsometric Studies of Poly-3-Methylthiophene Films Deposition under Different Conditions

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by L. M. Abrantes, F. Chao , M. Costa et al

163-166

DOI: DOI: 10.4152/pea.199101163

The Role of the «Charging Current» in the Electrochemical Behaviour of Polypyrrole

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by L. M. Abrantes, J. C. Mesquita, M. Kalaji et al.

167-170

DOI: DOI: 10.4152/pea.199101167

Digital Simulation Applied to the Identification of the Oxidation Mechanism of [FeH(CNMe) (dppe)2] [BF4]

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by M. Amélia N. D. A. Lemos, Armando J. L. O. Pombeiro

171-174

DOI: DOI: 10.4152/pea.199101171

The Cathodic Cleavage of Some Protecting Groups from Amine and Thiol Derivatives

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by M. D. Geraldo, M. J. Medeiros

175-180

DOI: DOI: 10.4152/pea.199101175

The Effect of Electrolyte Concentration on the Behaviour of Electrochemical Systems

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by M. F. Bento, M. J. Medeiros, M. I. Montenegro et al.

181-187

DOI: DOI: 10.4152/pea.199101181

Anodic Deprotonation of Methyleneamido to Nitrile Ligands at a Rhenium Centre

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by M. Fátima C.G. Silva, Armando J. L. Pombeiro

189-193

DOI: DOI: 10.4152/pea.199101189

Study of the Electrochemical Behaviour of the Cyanamide Complexes of Rhenium (I), TRANS--[Re(CNR) (NCR,) (dppe)2]+ (R,=NH2 or NHC (=NH) NH2)

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by M. Fernanda N. N. Carvalho, Armando J. L. Pombeiro

195-198

DOI: DOI: 10.4152/pea.199101195

Comportamiento Electroquimico del Polipirrol en Medio Poliestirensulfonatosodico

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by M. J. González-Tejera; A. de la Plaza, I. Hernandez-Fuentes

199-203

DOI: DOI: 10.4152/pea.199101199

The Existence of a Parallel Pathway Mechanism in the Reduction of Pyrimidine on Mercury

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by M. Rueda, I. Navarro, F. Prieto et al.

205-209

DOI: DOI: 10.4152/pea.1991012005

Effect of Proton-Donors on the Electroreduction of 3,4-Hexanedione

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by M. Ruiz Montoya, J. M. Rodriguez Mellado

211-214

DOI: DOI: 10.4152/pea.199101211

Redox Properties and Ligand Effects of Some Phosphonium-Functionalized Isocyanide Complexes of Group VI Transition Metal Carbonyls

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by M. T. A. Ribeiro, A. J. L. Pombeiro

215-219

DOI: DOI: 10.4152/pea.199101215

Influence of Temperature and Ionic Strength on the Complexation Parameters of the System Cu(II)--Fulvic Acid

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by M. Teresa S. D. Vasconcelos, Adélio A. S. C. Machado, Francisco Rey

221-224

DOI: DOI: 10.4152/pea.199101221

Conductivity Studies of a Novel Polymer Electrolyte Based on Europiumtryflouro-methanesulph onate

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by Michael Smith, Carlos Silva

225-231

DOI: DOI: 10.4152/pea.199101225

Study of the Electropolimerization of O-Toluidine and the Effect of the Temperature on the Resistance of the Polymer

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by P. Herrasti, P. Ocon

233-236

DOI: DOI: 10.4152/pea.199101233

Reduction del Acido Glioxílico sobre Eléctrodo de Mercúrio

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by R. Rodríguez-Amaro, M. Giménez, L. Camacho et al.

237-240

DOI: DOI: 10.4152/pea.199101237

Electrochemical Behaviour of Some Dinuclear Carbene Complexes of Pd or Pt

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by T. J. Castilho, A. J. L. Pombeiro, R. Bertani et al.

241-244

DOI: DOI: 10.4152/pea.199101241

Volume and Compressibility Changes of Solvents in Ionizing Processes

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by César A. N. Viana, António R. T. Calado

245-252

DOI: DOI: 10.4152/pea.199101245

Stability of Liquid Junction Potentials

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by Cristina R. R. Oliveira, M. J. F. Rebelo, M. F. G. F. C. Camões

253-258

DOI: DOI: 10.4152/pea.199101253

Analisis Comparativo de Algunas Ecuaciones Utilizadas en el Ajuste de Coeficientes de Actividad de Mezclas de Electrolitos

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by F. Hernández-Luis, L. Fernández-Mérida, M.A. Esteso

259-262

DOI: DOI: 10.4152/pea.199101259

Ecuaciones de Pitzer para Mezclas Electrolito +No-Electrolito. Dependência de las Interacciones Ion-Dipolo con la Fuerza Ionica del Medio y la Concentration de Zwitteriones

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by Guillermo E. Garcia, Raquel Rodríguez-Raposo, Luis Fernández-Mérida et al.

263-266

DOI: DOI: 10.4152/pea.199101263

Analisis Comparativo Entre las Ecuaciones de Pitzer y de Lim(Holl) para Mezclas de Electrolitos 1:1 + 1:2 (Orgânico)

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by Luis Fernández-Mérida, Felipe Hernández-Luis

267-270

DOI: DOI: 10.4152/pea.199101267

The Photochemistry of 1-Iodoanthraquinone Radical Anion

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by Richard G. Compton , Adrian C. Fisher, R. Geoffrey Wellington et al.

271-274

DOI: DOI: 10.4152/pea.199101271

Application of In-Situ SnifTIRS to the Study of the Electroreduction of Dioxygen on Gold

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by P. Christensen, C. Paliteiro, A. Hamnett

275-278

DOI: DOI: 10.4152/pea.199101275

In Situ Infrared Reflectance Spectroscopy of Formaldehyde Adsorption on Polycrystalline Platinum Electrodes in Alkaline Medium

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by P. Olivi, L. O. S. Bulhões, B. Beden et al.

279-282

DOI: DOI: 10.4152/pea.199101279