Rare Earths - Brazil x China
Mariana A. Sanchez; Diogo L. Rocha; Wanessa R. Melchert; Fábio R. P. RochaHow to cite this article
Apparatus for dissolution assays of pharmaceutical preparations exploiting a flow-system with multi-commutation. The output of the detection system shows the transient signals and the corresponding dissolution curves.
Paulo C. Nascimento; Alexandre B. Schneider; Denise Bohrer; Leandro M. de Carvalho; Cristiane L. JostHow to cite this article
Potential and pH procedure for the sequential voltammetric determination of metallic traces in saline hemodialysis concentrates. Chromium was quantified by adsorptive cathodic stripping voltammetry. Anodic stripping voltammetry was used for Tl, Cd, Pb, Cu and Sb quantification.
Elisangela de Andrade Passos; Jose do Patrocínio H. Alves; Carlos Alexandre B. Garcia; Antonio C. Spinola CostaHow to cite this article
This study presents the distributions of Cd, Cr, Cu, Ni, Pb and Zn in sediments of the Sergipe River. All of the sediment samples presented evidence of anthropogenic enrichment and around 30% of the metal content was present in the inert fraction.
Manav Sharma; Parikshit R Jawa; Ravinder S Gill; Gulshan BansalHow to cite this article
A forced degradation study on citalopram hydrobromide has revealed five degradation products.One photolytic and two hydrolytic products are characterized through LC-MS studies. A SIAM is developed and validated for quantitative analysis of citalopram.
Ajjanna M. Sridhara; Kallam R. Venugopala Reddy; Jathi Keshavayya; Dasannana Malige S. Ambika; Vadiraj S. Gopinath; Prosenjit Bose; Sanath Kumar Goud; Sanenahalli K. PeethambarHow to cite this article
Synthesis of 3-isoxazoline substituted phthalazine-methoxyacrylate derivatives.
Nataliya A. Nikitina; Elena A. Reshetnyak; Nataliya V. Svetlova; Nikolay O. Mchedlov-PetrossyanHow to cite this article
The acid-base indicator dyes were embedded into the gelatin films by extracting from aqueous media under appropriate conditions. The well-reproducible indices of the apparent ionization constants, pKaapp, of the indicators were calculated by conventional equating the pH values of the bulk aqueous buffer and those of the 'internal' water into the gelatin films.
Adriana F. Faria; Luiza F. Marcellos; Juliana P. Vasconcelos; Marcus V. N. de Souza; Antônio L. S. Júnior; Weberton R. do Carmo; Renata Diniz; Marcone A. L. de OliveiraHow to cite this article
UV-Vis spectra of eleven experiments performed through a full 32 experimental design for CuETB complexation study.
Iranildes D. dos Santos; Júlio C. Afonso; Achilles J. B. DutraHow to cite this article
The electrolytic plug flow reactor was used: (i) to demonstrate that NaCl is a better supporting electrolyte than Na2SO4; (ii) to determine the effect of NaCl concentration on phenol removal; (iii) to determine the influence of electrolysis time on COD removal.
João B. Pereira Junior; Kelly G. FernandesHow to cite this article
This figure shows the steps of the analytical procedure.
Mônica A. T. Santos; Marili V. N. Rodrigues; Miguel A. Áreas; Felix G. R. ReyesHow to cite this article
This study determined the residual levels of permethrin and deltamethrin in the liver and heart tissues of Wistar rats submitted to sub-chronic oral exposure with pyrethroids, as well as the effect of ingesting fibers on the residual levels of the pyrethroids by using GC-ECD analysis.
B. Rezaei; S. Z. Mirahmadi Zare; Ali A. EnsafiHow to cite this article
Dexamethasone as steroid hormone do not have electrooxidation on pencil graphite electrode but with using of multiwalled carbon nanotubes it shows the electrooxidation behavior.
Ramin Ghorbani-Vaghei; Zahra Toghraei-Semiromi; Rahman Karimi-NamiHow to cite this article
Poly(N,N'-dibromo-N-ethyl-benzene- 1,3-disulfonamide) [PBBS] and N,N,N',N'-tetrabromo-benzene-1,3-disulfonamide [TBBDA ] are reusable and efficient catalysts for the synthesis of 4H-chromenes and dihydropyrano[3,2-c]chromenes.
Patrícia S. Rezende; Priscila A. S. Moura; Walter A. Durão Jr.; Clésia C. Nascentes; Cláudia C. Windmöller; Letícia M. CostaHow to cite this article
Arsenic and mercury determinations were realized in 28 sediment samples from the São Francisco River Basin, Minas Gerais. The elements were analysed by hydride generator atomic absorption spectrometry (HG AAS). Adictionally, mercury determination was realized in the solid samples by direct mercury analyzer (DMA).
Cristina Quispe; Fabiane M. Nachtigall; Maria Francesca R. Fonseca; Rosana M. Alberici; Luis Astudillo; Jorge Villaseñor; Marcos N. Eberlin; Leonardo S. SantosHow to cite this article
Online ESI-MS monitoring provided detailed information about organic intermediates connecting parent molecules and final mineralization products during advanced oxidation processes of Nadolol, Atenolol and Acebutolol.
Solange M. Cottica; Alexandra C. H. F. Sawaya; Marcos N. Eberlin; Selma L. Franco; Lucia M. Zeoula; Jesuí V. VisentainerHow to cite this article
Correlation coefficients between the DPPH· and FRAP methods, and contents of phenolic compounds and flavonoids of propolis ethanolic extracts obtained with different concentrations of propolis and ethanol contents.
Carolina B. G. Teles; Leandro S. Moreira; Alexandre de A. E. Silva; Valdir A. Facundo; Juliana P. Zuliani; Rodrigo G. Stábeli; Izaltina Silva-JardimHow to cite this article
Structure of a natural triterpene, 3 b,6 b,16b-triidroxilup-20(29)-eno, isolated from Combretum leprosum fruits which has leishmanicidal activity against Leishmania amazonensis promastigotes.
Fernando C. Silva; Lucienir P. Duarte; Grácia D. F. Silva; Sidney A. V. Filho; Ivana S. Lula; Jacqueline A. Takahashi; William S. T. SallumHow to cite this article
Complete 1D/2D NMR data are presented for 3-oxo-12a,29-dihydroxyfriedelane and 3,16-dioxo-dihydroxyfriedelane isolated from branches hexane extract of M. gonoclada. The antimicrobian activity of some constituents are also reported.
Nathália F. Carvalho; Simão P. Silva; Stella M. ResendeHow to cite this article
Graphical representations of methanesulfonic acid and the two conformers of methanesulfinic acid, whose spectroscopic and thermochemical properties were obtained from high level ab initio calculations.
Julierme G. Silva; Maria T. Faria; Érica R. Oliveira; Maria H. Rezende; Dalva G. Ribeiro; Heleno D. Ferreira; Suzana C. Santos; José C. Seraphin; Pedro H. FerriHow to cite this article
Essential oils and morphological characters from thirteen Hypenia spp. revealed the presence of two taxonomic clusters.
Gleiciani Q. Silveira; Célia M. Ronconi; Maria D. Vargas; Rosane A. S. San Gil; Alvicler MagalhãesHow to cite this article
Our work has demonstrated that the reaction of aminopropylsilicalgel NPs with labile 2-methoxy-1,4-naphthoquinones is a good route to silica NPs containing bound amino-naphthoquinones.
Júnior Nascimento; Marina Pelegrini; Luiz F. A. Ferrão; Orlando Roberto-Neto; Francisco B. C. MachadoHow to cite this article
TPotential energy curves along the Internal Reaction Coordinate path for the rotation motion of methylamine, dimethylamine and trimethylamine molecules.
Rafael Ruiz; Isabel Castro; Emilio Pardo; Jesús Ferrando-Soria; Joan Cano; Francesc Lloret; Miguel JulveHow to cite this article
The oximato-bridged copper(II)-manganese(III) chains of formula [MnCu(deg)2(CH3COO)(H2O)2] (1), [MnCu(meg)2(CH3COO)(H2O)2] (2) and [MnCu(dmg)2(CH3COO)(H2O)2] (3) (H2deg = diethylgly-oxime, H2meg = methylethylglyoxime and H2dmg = dimethylglyoxime) exhibit intrachain ferromagnetic coupling and slow relaxation of the magnetisation, behaving as single chain magnets (SCMs).
Najma Sultana; M. Saeed Arayne; Sana Shamim; Mahwish Akhtar; Somia GulHow to cite this article
Graphical abstract represents the chromatogram of gemifloxacin (GMFX) at a concentration level of 25 ìg mL-1 in mobile phase (a) composed of methanol:water (90:10, v/v) and human serum (b) at 270 nm, obtained by applying the proposed method.
Marilene N. Oliveira; Lourivaldo S. Santos; Giselle M. S. P. Guilhon; Alberdan S. Santos; Isabel C. S. Ferreira; Manoel L. Lopes-Junior; Mara Silvia P. Arruda; Andrey M. R. Marinho; Milton N. da Silva; Edson Rodrigues-Filho; Maria C. F. OliveiraHow to cite this article
The endophytic fungus Pestalotiopsis guepinii was grown on rice and produced a new anthra-quinone derivative named guepinone.
Shizue Echigo; Leonardo Castellanos; Carmenza Duque; Hidehiro Uekusa; Noriyuki Hara; Yoshinori FujimotoHow to cite this article
The C-24 configurations of the two marine sterols were determined by comparing their NMR data with those of stereodefined (24R)- and (24S)-samples that were synthesized in routes involving the orthoester Claisen rearrangement.
Online version ISSN 1678-4790 Printed version ISSN 0103-5053
Journal of the Brazilian Chemical Society
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