JBCS

3:43, Sun Dec 8

Open Access/APCs

Current Issue vol. 31, No. 1, 2020, p. 2-210

 

The colonial zoanthids Palythoa harbor a wide diversity of associated microorganisms including bacteria, promising source of biologically active compounds. New chromomycins, isolated from a Streptomyces sp. associated to the Brazilian Palythoa caribaeorum, showed potent cytotoxicity against resistant tumor cells (IC50 of 0.2 to 133 nM). Details are presented in the Article Dextrorotatory Chromomycins from the Marine Streptomyces sp. Associated to Palythoa caribaeorum by Francisco C. L. Pinto, Edilberto R. Silveira, Ana Caroline L. Vasconcelos, Katharine G. D. Florêncio, Francisca A. S. Oliveira, Bianca B. Sahm, Letícia V. Costa-Lotufo, Anelize Bauermeister, Norberto P. Lopes, Diego V. Wilke and Otília D. L. Pessoa on page 143.


Cover Article
J. Braz. Chem. Soc. 2020, 31(1), 143-152

Dextrorotatory Chromomycins from the Marine Streptomyces sp. Associated to Palythoa caribaeorum

Francisco C. L. Pinto ; Edilberto R. Silveira ; Ana Caroline L. Vasconcelos; Katharine G. D. Florêncio; Francisca A. S. Oliveira; Bianca B. Sahm; Letícia V. Costa-Lotufo ; Anelize Bauermeister; Norberto P. Lopes; Diego V. Wilke ; Otília D. L. Pessoa

How to cite this article

This paper describes the isolation and structure elucidation of four dextrorotatory chromomycins from a cytotoxic extract produced by a Streptomyces bacteria strain recovered from the zoanthid P. caribaeorum, collected at Pedra Rachada Beach, located on the west coast of Ceará State.

Published online: June 25, 2019
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Editorial

Review J. Braz. Chem. Soc. 2020, 31(1), 2-14

Serpentinites: Mineral Structure, Properties and Technological Applications

Ottavio Raul D. R. Carmignano; Sara S. Vieira; Paulo Roberto G. Brandao; Alexandre C. Bertoli; Rochel M. Lago

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The serpentine is a versatile mineral family rich in Mg silicate with several polymorphic phases with unique physicochemical properties and potential applications.

http://dx.doi.org/10.21577/0103-5053.20190215

Published online: September 4, 2019
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Articles J. Braz. Chem. Soc. 2020, 31(1), 15-24

Use of Arduino in the Development of a New and Fast Automated Online Preconcentration System Based on Double-Knotted Reactor for the Mn Determination in Tea Samples by Flame Atomic Absorption Spectrometry

Jeferson A. Barreto; Valfredo A. Lemos; Djalma M. de Oliveira; Uillian Mozart F. M. Cerqueira; Lucília A. Meira; Marcos A. Bezerra

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Arduino was used to develop an automated preconcentration system based on double-knotted reactor (KR) for Mn determination in tea leaves.

http://dx.doi.org/10.21577/0103-5053.20190118

Published online: May 28, 2019
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J. Braz. Chem. Soc. 2020, 31(1), 25-32

Determination of Catechol and Hydroquinone by Using Perilla frutescens Activated Carbon Modified Glassy Carbon Electrode

Meiqin Zheng ; Jingjing Zhu; Rongrong Fan; Yujie Wang; Zhaojun Lv; Yongming Han; Jun Peng; Xinyu Zheng; Ruiyu Lin

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Hydroquinone (HQ) and catechol (CC) cannot be separated at the bare glassy carbon electrode (GCE). On the contrary, distinguishable redox peaks of HQ and CC can be observed at high specific surface area activated carbon prepared by Perilla frutescens (PFHSAAC)/GCE. So it is possible to determine HQ and CC by using PFHSAAC/GCE.

http://dx.doi.org/10.21577/0103-5053.20190120

Published online: May 30, 2019
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J. Braz. Chem. Soc. 2020, 31(1), 33-39

Direct Analysis of Human Hair Before and After Cosmetic Modification Using a Recent Data Fusion Method

Mônica C. Santos; Fabíola M. V. Pereira

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Direct analysis of human hair can help to identify an individual. Fusion data improved chemical information for hair samples.

http://dx.doi.org/10.21577/0103-5053.20190121

Published online: May 31, 2019
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J. Braz. Chem. Soc. 2020, 31(1), 40-50

New Proposal for Sugarcane Vinasse Treatment by Hydrothermal Carbonization: An Evaluation of Solid and Liquid Products

Laís G. Fregolente; Antonio J. R. de Castro; Altair B. Moreira; Odair P. Ferreira; Márcia C. Bisinoti

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Applying hydrothermal carbonization as treatment process to vinasse a solid is generated, rich in nutrients, and a liquid phase cleaner than vinasse.

http://dx.doi.org/10.21577/0103-5053.20190122

Published online: June 3, 2019
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J. Braz. Chem. Soc. 2020, 31(1), 51-65

Investigating Surface Properties and Lithium Diffusion in Brookite-TiO2

Corinne Arrouvel ; Stephen Charles Parker

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Highlighting the stability, the surface properties of brookite TiO2 versus its polymorphs and revisiting the observed morphologies for lithium batteries and catalysis.

http://dx.doi.org/10.21577/0103-5053.20190123

Published online: June 5, 2019
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J. Braz. Chem. Soc. 2020, 31(1), 66-78

Synthesis, Characterization and Conformational Analysis of Two Novel 4(1H)‑Quinolinones

Lidiane J. Michelini ; Wesley F. Vaz; Luiz F. N. Naves; Caridad N. Pérez; Hamilton B. Napolitano

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Differences noted on highest occupied molecular orbital (HOMO), lowest unoccupied molecular orbital (LUMO), molecular electrostatic potential (MEP) and supramolecular arrangement of two novel 4(1H) quinolinones are associated to substituents chlorine and nitro.

http://dx.doi.org/10.21577/0103-5053.20190124

Published online: June 5, 2019
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J. Braz. Chem. Soc. 2020, 31(1), 79-89

Integrative Approach Based on Leaf Spray Mass Spectrometry, HPLC‑DAD‑MS/MS, and NMR for Comprehensive Characterization of Isoquinoline-Derived Alkaloids in Leaves of Onychopetalum amazonicum R. E. Fr.

Bruna R. de Lima; Felipe M. A. da Silva ; Elzalina R. Soares; Richardson A. de Almeida; Francinaldo A. da Silva-Filho; Andersson Barison; Emmanoel V. Costa; Hector H. F. Koolen ; Afonso D. L. de Souza; Maria Lúcia B. Pinheiro

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The integrative approach based on mass spectrometry (MS) and nuclear magnetic resonance (NMR) techniques showed to be a useful strategy for comprehensive characterization of isoquinoline-derived alkaloids.

http://dx.doi.org/10.21577/0103-5053.20190125

Published online: June 5, 2019
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J. Braz. Chem. Soc. 2020, 31(1), 90-99

Acid-Catalyzed Z-E Isomerization of γ-Alkylidenebutenolides: An Experimental and DFT Study

Jodieh O. S. Varejao; Luiz C. A. Barbosa; Eduardo V. V. Varejao; Aline H. Souza; Mateus R. Lage; José W. M. Carneiro

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Acid-catalyzed Z-E isomerization of γ-alkylidenebutenolide observed from experiments and studied using density functional theory (DFT).

http://dx.doi.org/10.21577/0103-5053.20190131

Published online: June 7, 2019
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J. Braz. Chem. Soc. 2020, 31(1), 100-108

Performance of Avocado Seed Activated Carbon as Adsorbent for Highly Sensitive Determination of Cd Using a Flow Injection System Online Coupled to TS-FF-AAS

Marianne V. F. Kudo; Leandro L. G. de Oliveira; Fabio A. C. Suquila; Fernanda G. de Almeida; Mariana G. Segatelli; Éder C. Lima; Silvio L. P. Dias; César R. T. Tarley

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Avocado seed activated carbon as adsorbent for online Pb2+ preconcentration and thermospray flame furnace atomic absorption spectrometry (TS-FF-AAS) determination.

http://dx.doi.org/10.21577/0103-5053.20190132

Published online: June 7, 2019
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J. Braz. Chem. Soc. 2020, 31(1), 109-115

Magnetic Solid-Phase Microextraction for Lead Detection in Aqueous Samples Using Magnetite Nanoparticles

Carolina A. S. Silva; Raphael L. S. e Silva; Alberthmeiry T. de Figueiredo; Vanessa N. Alves

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A microextraction and preconcentration methodology using magnetite nanoparticles for lead determination in aqueous samples.

http://dx.doi.org/10.21577/0103-5053.20190134

Published online: June 7, 2019
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J. Braz. Chem. Soc. 2020, 31(1), 116-125

Strontium Oxide Decorated Iron Oxide Activated Carbon Nanocomposite: A New Adsorbent for Removal of Nitrate from Well Water

Mohammad K. M. Nodeh; Gholamreza N. Bidhendi; Mohammad A. Gabris; Behrouz Akbari-adergani; Hamid R. Nodeh; Aliakbar Masoudi; Syed Shahabuddin

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Magnetized activated carbon by iron oxide and modified by positively charged strontium based nanoparticles (FeAC@Sr) introduced an efficient adsorbent for the removal of negatively charged nitrate ions from underground water.

http://dx.doi.org/10.21577/0103-5053.20190138

Published online: June 17, 2019
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J. Braz. Chem. Soc. 2020, 31(1), 126-134

Concomitant Production of Hydrogen, Sodium Acetate, and Polymerized Species from Non-Catalytic Ethanol Dehydrogenation

Bárbara B. Cazula ; Eduardo C. Meurer; Alan M. Fortes; Angelica P. Tonin; Lázaro J. Gasparrini; Carlos I. Yamamoto; Helton J. Alves

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A detailed study of the production of hydrogen, sodium acetate and high added-value liquid products from the ethanol dehydrogenation reaction.

http://dx.doi.org/10.21577/0103-5053.20190139

Published online: June 18, 2019
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J. Braz. Chem. Soc. 2020, 31(1), 135-142

Multi-Element Evaluation in Black Pepper (Piper nigrum L.) According to the Processing

Maiara Krause; Luiza V. Vieira; Tiago P. Cunha; Geisamanda P. Brandao; Paulo Roberto Filgueiras; Maria Tereza W. D. Carneiro

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Influence of black pepper processing on trace element levels.

http://dx.doi.org/10.21577/0103-5053.20190141

Published online: June 19, 2019
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J. Braz. Chem. Soc. 2020, 31(1), 143-152

Dextrorotatory Chromomycins from the Marine Streptomyces sp. Associated to Palythoa caribaeorum

Francisco C. L. Pinto ; Edilberto R. Silveira ; Ana Caroline L. Vasconcelos; Katharine G. D. Florêncio; Francisca A. S. Oliveira; Bianca B. Sahm; Letícia V. Costa-Lotufo ; Anelize Bauermeister; Norberto P. Lopes; Diego V. Wilke ; Otília D. L. Pessoa

How to cite this article

 

This paper describes the isolation and structure elucidation of four dextrorotatory chromomycins from a cytotoxic extract produced by a Streptomyces bacteria strain recovered from the zoanthid P. caribaeorum, collected at Pedra Rachada Beach, located on the west coast of Ceará State.

http://dx.doi.org/10.21577/0103-5053.20190144

Published online: June 25, 2019
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J. Braz. Chem. Soc. 2020, 31(1), 153-161

Solvothermal Synthesis of Cerium-Doped Titania Nanostructured Materials Modified with Acetylacetone for Solar-Driven Photocatalysis

Bruno A. T. Menezes; Daniel E. B. Moreira; Hugo A. Oliveira; Lippy F. Marques; Juliana F. Lima

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Cerium addition reduces the bandgap energy of new nanostructured TiO2:Cex% photocatalysts from ca. 3.0 to 1.45 eV. Mild photocatalysis conditions can be efficiently applied to degrade dyes.

http://dx.doi.org/10.21577/0103-5053.20190148

Published online: June 28, 2019
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J. Braz. Chem. Soc. 2020, 31(1), 162-169

Selective Inner-Filter on the Fluorescence Response of Chlorophyll and Pheophytin Molecules Extracted from Caesalpinia echinata Leaves

Jefferson M. S. Lopes; Sanclayton G. C. Moreira; Newton M. Barbosa Neto

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Stepwise extraction of molecules from Brazil-wood by methanol implies in the selective inner-filter on chlorophyll a fluorescence.

http://dx.doi.org/10.21577/0103-5053.20190150

Published online: July 2, 2019
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J. Braz. Chem. Soc. 2020, 31(1), 170-174

Well Defined Rich Electronic Structure: Facile Approach for Nido-Carborane Fused Azaspirodecaniums in Water Solution

Zhixiang Lv; Zhou Wang; Fuyan Xiao; Guofan Jin

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Facile approach for nido-carborane fused azaspirodecaniums in water solution.

http://dx.doi.org/10.21577/0103-5053.20190152

Published online: July 3, 2019
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J. Braz. Chem. Soc. 2020, 31(1), 175-185

Microwave Assisted Ultra-Fast Method to Synthesize Carbonate-Phosphates, Na3MCO3PO4 (M = Mn, Fe, Co, Ni) - Relevant Materials Applied in Sodium-Ion Batteries

Demétrio A. S. Costa; Lorena A. C. Costa; Joao O. Mendes; Wagner N. Mussel; José D. Ardisson; Luciano A. Montoro

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It is described herein an ultra-fast hydrothermal microwave assisted method for obtaining a series of sodium-carbonate-phosphate compounds, Na3MCO3PO4 (M = Mn, Fe, Co or Ni) upon 5 min thermal processing, and with relevant application as cathode material in Na-ion batteries.

http://dx.doi.org/10.21577/0103-5053.20190154

Published online: July 11, 2019
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J. Braz. Chem. Soc. 2020, 31(1), 186-192

Resorcinolic Lipids from Yucatecan Propolis

Mercedes G. Herrera-López; Evelyn I. Rubio-Hernández; Pascal Richomme; Andreas Schinkovitz; Luz M. Calvo-Irabién; Luis M. Peña Rodríguez

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Argentation chromatography purification of a Yucatecan propolis extract with antioxidant activity allowed the identification of six resorcinolic lipids.

http://dx.doi.org/10.21577/0103-5053.20190156

Published online: July 11, 2019
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J. Braz. Chem. Soc. 2020, 31(1), 193-200

Cytotoxic Activity of Synthetic Chiral Amino Acid Derivatives

Pedro P. de Castro; Raoni P. Siqueira; Luiza Conforte; Chris H. J. Franco; Gustavo C. Bressan; Giovanni W. Amarante

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Forty amino acids derivatives were assayed towards four different cancer lines and two normal strains. Three derivatives were found with mean half-maximal inhibitory concentration (IC50) at the low micromolar range. The N-alkyl diamine associated with an amino acid scaffold showed promising results.

http://dx.doi.org/10.21577/0103-5053.20190157

Published online: July 12, 2019
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Short Report J. Braz. Chem. Soc. 2020, 31(1), 201-210

TiO2 Decorated Sand Grains for Photodegradation of Pollutants: Methylene Blue and Ciprofloxacin Study

Jorge A. S. Lacerda; Allan M. Macedo; Rodolfo I. Teixeira; Grazieli Simoes; Emerson S. Ribeiro ; Josué S. B. Forero; Rodrigo J. Corrêa

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Methylene blue (MB) photooxidation over TiO2 decorated sand grains.

http://dx.doi.org/10.21577/0103-5053.20190129

Published online: June 6, 2019
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Online version ISSN 1678-4790 Printed version ISSN 0103-5053
Journal of the Brazilian Chemical Society
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