JBCS

Editorial

Henrique E. Toma

https://dx.doi.org/10.1590/S0103-50532005000400001

β-Butyltellanyl Carbonyl Compounds: A Useful Source of Masked Metal Homoenolates

Alcindo A. dos Santos; João V. Comasseto

https://dx.doi.org/10.1590/S0103-50532005000400002

New Catalysts Based on Silicon Carbide Support for Improvements in the Sulfur Recovery. New Silicon Carbide Nanotubes as Catalyst Support for the Trickle-bed H₂S Oxidation

Nicolas Keller; Ricardo Vieira; Jean-Mario Nhut; Cuong Pham-Huu; Marc J. Ledoux

https://dx.doi.org/10.1590/S0103-50532005000400003

Determination of Trace Lead in Waters by Flow Injection Hydride Generation Atomic Absorption Spectrometry

Jane F. Neves Carrijo; Luciano C. Brasil; Nívia M. Melo Coelho

https://dx.doi.org/10.1590/S0103-50532005000400004

A New Neolignan and Antioxidant Phenols from Nectandra grandiflora

Alan B. Ribeiro; Vanderlan da S. Bolzani; Massayoshi Yoshida; Leonardo S. Santos; Marcos N. Eberlin; Dulce H. S. Silva

https://dx.doi.org/10.1590/S0103-50532005000400005

Development of a DC-Plasma Torch Constructed with Graphite Electrodes and an Integrated Nebulization System for Decomposition of CCl₄

Anelise L.V. Cubas; Eduardo Carasek; Nito A. Debacher; Ivan G. de Souza

https://dx.doi.org/10.1590/S0103-50532005000400006

Studies on the Niobium Pentachloride-Mediated Nucleophilic Additions to an Enantiopure Cyclic N-acyliminium Ion Derived from (S)-malic acid

Carlos Kleber Z. Andrade; Rafael O. Rocha; Dennis Russowsky; Marla N. Godoy

https://dx.doi.org/10.1590/S0103-50532005000400007

Determination of Metals in Brazilian Coconut Water Using an Inductively Coupled Plasma Optical Emission Spectrometer

Rafael A. de Sousa; Nivaldo Baccan; Solange Cadore

https://dx.doi.org/10.1590/S0103-50532005000400008

Electrochemical Impedance and Current Fluctuations Analysis During Slow Strain Rate Test of a UNS S30400 Stainless Steel in Low pH Media

Ivan N. Bastos; Ricardo P. Nogueira; José A. C. Ponciano

https://dx.doi.org/10.1590/S0103-50532005000400009

Muscicapines, a New Class of Guaiane-Type Sesquiterpene Alkaloids from Croton muscicapa

Vicente T. de Araújo-Júnior; Marcelo S. da Silva; Emídio V. Leitão da-Cunha; Maria de Fátima Agra; Petrônio F. de Athayde-Filho; Ivo J. Curcino Vieira; Raimundo Braz-Filho; José M. Barbosa-Filho

https://dx.doi.org/10.1590/S0103-50532005000400010

Influence of the pH and Substrate Immersion Time on the Adsorption of Poly(o-ethoxyaniline) in Self-Assembled Films

Everaldo C. Venancio; Leonardo G. Paterno; Nelson Consolin Filho; Carlos E. Borato; Alessandra Firmino; Luiz H. C. Mattoso

https://dx.doi.org/10.1590/S0103-50532005000400011

Characterization of Natural Brazilian Clays and their Utilization as Catalysts in the Coiodination of Alkenes with Water and Alcohols

Raul A. S. Villegas; José Luiz do Espírito Santo Jr.; Marcio C. S. de Mattos; Mônica R. M. P. de Aguiar; Alcides W. S. Guarino

https://dx.doi.org/10.1590/S0103-50532005000400012

Iodide-Selective Membrane Electrode Based on Salophen Complex of Cobalt (III)

Hamid R. Zare; Farkhondeh Memarzadeh; Alireza Gorji; Mohammad Mazloum Ardakani

https://dx.doi.org/10.1590/S0103-50532005000400013

Three New Triterpenes from the Resinous Bark of Protium kleinii and their Antinociceptive Activity

Fabiana V. Lima; Angela Malheiros; Michel F. Otuki; João B. Calixto; Rosendo A. Yunes; Valdir Cechinel Filho; Franco Delle Monache

https://dx.doi.org/10.1590/S0103-50532005000400014

Theoretical Nonlinear Optics Equivalence Between Mesoionic and Polyenic Bridges in Push-Pull Compounds

Andréa M. S. Silva; Gerd Bruno da Rocha; Paulo Henrique Menezes; Joseph Miller; Alfredo M. Simas

https://dx.doi.org/10.1590/S0103-50532005000400015

Selective Catalytic Reduction of NO to N₂ with Copper and Cobalt Exchanged ZSM-5 Zeolites: The Effect of Calcium Addition

Leandro Martins; Robson Pablo S. Peguin; Martin Wallau; Ernesto Antonio Urquieta-González

https://dx.doi.org/10.1590/S0103-50532005000400016

A Simple Low-Cost Simulation Protocol for Approximate Localization of Structural Water Molecules in DNA Oligonucleotides

Amarílis de V. Finageiv Neder; Marçal de Oliveira Neto

https://dx.doi.org/10.1590/S0103-50532005000400017

Gas-Phase Selective Conjugate Addition of Methanol to Acetone for Methyl Vinyl Ketone Over SnO₂ Nanoparticle Catalysts

Humberto V. Fajardo; Luiz F. D. Probst; Antoninho Valentini; Neftalí L. V. Carreño; Adeilton P. Maciel; Edson R. Leite; Elson Longo

https://dx.doi.org/10.1590/S0103-50532005000400018

Biotransformation of Digitoxigenin by Fusarium Ciliatum

Rodrigo M. Pádua; Alaíde B. Oliveira; José D. Souza Filho; Géssy J. Vieira; Jacqueline A. Takahashi; Fernão C. Braga

https://dx.doi.org/10.1590/S0103-50532005000400019

Oxidative Dimerization of Ru(III)-EDTA Complex on the Surface of Functionalized Silica Gel

Lúcia Codognoto; Patrícia Graça Zanichelli; Rosana Lázara Sernaglia

https://dx.doi.org/10.1590/S0103-50532005000400020

Racemic Synthesis of 1,2-Secomicrominutinin

Rosangela da Silva; Paulo Marcos Donate; Gil Valdo José da Silva; Susimaire Pedersoli; Carlos Alemán

https://dx.doi.org/10.1590/S0103-50532005000400021

Others Flavonoids from Ouratea hexasperma (Ochnaceae)

Juliana F. de S. Daniel; Mário Geraldo de Carvalho; Renata da S. Cardoso; Maria de F. Agra; Marcos N. Eberlin

Evaluation of a Continuum Source Tungsten Coil Atomic Absorption Spectrometer: A Study of Zn Behavior

Joaquim A. Nóbrega; Jennifer Rust; Clifton P. Calloway Jr.; Bradley T. Jones

https://dx.doi.org/10.1590/S0103-50532005000400023

New Diterpenoids from Leaves of Guarea macrophylla (Meliaceae)

João Henrique G. Lago; Nídia F. Roque

https://dx.doi.org/10.1590/S0103-50532005000400024

Facile and Mild Deprotection of Semicarbazones Under Solvent-Free Conditions with N,N,N',N'-Tetrabromo-benzene-1,3-disulfonylamide

Ramin Ghorbani-Vaghei; Elham Shahbazee

https://dx.doi.org/10.1590/S0103-50532005000400025

Development and Validation of a Multi-Residue Analytical Methodology to Determine the Presence of Selected Pesticides in Water Through Liquid Chromatography

Silvia H. G. Brondi; Fernando M. Lanças

https://dx.doi.org/10.1590/S0103-50532005000400026

Zizyphus mauritiana Lam. (Rhamnaceae) and the Chemical Composition of its Floral Fecal Odor

Ruy J. V. Alves; Angelo C. Pinto; Alexandre V. M. da Costa; Claudia M. Rezende

https://dx.doi.org/10.1590/S0103-50532005000400027

Long-Range Correlations ( ⁿj _C,H n > 3 ) in the HMBC Spectra of 3-(4-Oxo-4H-chromen-3-YL)-acrylic Acid Ethyl Esters

Ramiro Araya-Maturana; José A. Gavín-Sazatornil; Jorge Heredia-Moya; Hernán Pessoa-Mahana; Boris Weiss-López

https://dx.doi.org/10.1590/S0103-50532005000400028

Chemical Constituents of Cordia piauhiensis - Boraginaceae

Renata Paiva dos Santos; Telma L. G. Lemos; Otilia Deusdênia L. Pessoa; Raimundo Braz-Filho; Edson Rodrigues-Filho; Francisco Arnaldo Viana; Edilberto R. Silveira

https://dx.doi.org/10.1590/S0103-50532005000400029

Novel Synthetic Methodology for Metalloporphyrins in Ionic Liquid

Ram Singh; Geetanjali

https://dx.doi.org/10.1590/S0103-50532005000400030

Inhibition of the Symbiotic Fungus of Leaf-Cutting Ants by Coumarins

Marizete F. P. Godoy; Sandra R. Victor; Adriana M. Bellini; Gisleine Guerreiro; Waldireny C. Rocha; Odair C. Bueno; Maria J. A. Hebling; Maurício Bacci Jr; M. Fátima G. F. da Silva; Paulo C. Vieira; João B. Fernandes; Fernando C. Pagnocca

https://dx.doi.org/10.1590/S0103-50532005000400031

Bi(OTf)₃ or Bi(TFA)₃ Catalyzed Efficient, Regio- and Chemoselectively Synthesis of β-Hydroxy Thioethers from Aryl Disulfides in the Presence of Zinc Powder

Mohammad Mehdi Khodaei; Ahmad Reza Khosropour; Kazem Ghozati

https://dx.doi.org/10.1590/S0103-50532005000400032

Sesquiterpene Lactones from Minasia alpestris

Antônio Eduardo M. Crotti; Wilson R. Cunha; Norberto P. Lopes; João Luis C. Lopes

https://dx.doi.org/10.1590/S0103-50532005000400033