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Current Issue vol. 33, No. 6, 2022, p. 509-607

 

The migration to green energy and to innovative disposal of solid waste has emerged due to global problems such as fossil fuels scarcity, climate change, and environmental pollution. The production of eco-friendly biofuels from residual fatty materials as feedstock is a brand-new solution for waste management and energy generation. In this work, biofuels were made from 3 different fatty wastes (from the fat trap of a sewage station, lard waste, and frying oil) and showed physical and chemical properties analogous to petroleum diesel. Recovery of energy from waste is a core part of a circular economy and the investment in long-term biofuel synthesis could impact positively the global economy and the environment. Details are presented in the Article Diesel-Like Biofuels Production Using Fatty Waste by Lyvia N. B. Menezes, Paulo A. Z. Suarez and Grace F. Ghesti on page 550.
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Review J. Braz. Chem. Soc. 2022, 33(6), 509-522

NMR Relaxometry Applied to Chemical Studies of Paramagnetic Metal Cation Complexes: Fundamentals and Applications

Fl�vio V. C. Kock ; Luiz A. Colnago

How to cite this article

 

This review provides basic theory of time domain nuclear magnetic resonance (TD-NMR) relaxometry of paramagnetic cations in solution and important applications in electrochemistry, analytical and inorganic chemistry.

https://dx.doi.org/10.21577/0103-5053.20220045

Published online: March 11, 2022

 

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Total access: 174


Articles J. Braz. Chem. Soc. 2022, 33(6), 523-529

Determination of Ethyl Carbamate in Commercial Sweetened Sugar Cane Spirit by ESI-MS/MS Using Modified QuEChERS and 18-Crown-6/Trifluoroacetic Acid Spiking Additives

Ang�lica P. P. Tonin; Camila B. Poliseli; Nayane M. Sinosaki; Fernanda C. Martinez; Oscar O. Santos ; Cl�udio C. Oliveira; Valquiria M. Silva; Jesu� V. Visentainer ; Eduardo C. Meurer

How to cite this article

 

Simple and rapid analysis of sugar cane spirit by direct injection electrospray ionization-tandem mass spectrometry.

https://dx.doi.org/10.21577/0103-5053.20220001

Published online: January 5, 2022

 

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Total access: 275


J. Braz. Chem. Soc. 2022, 33(6), 530-540

A Simple, Rapid, and Reliable Titrimetric Method for the Determination of Glycerol at Low Concentration

Luana O. Santos; Sheisi F. L. S. Rocha; Cristina M. Barra; Matthieu Tubino ; Jos� G. Rocha Junior

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Unreacted periodate masking after glycerol oxidation provided a simple, reliable, fast, and green titrimetric method for glycerol determination, which was successfully quantified in biodiesel.

https://dx.doi.org/10.21577/0103-5053.20220004

Published online: January 6, 2022

 

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Total access: 340


J. Braz. Chem. Soc. 2022, 33(6), 541-549

Enhancement of Visible Light-Responsive Photocatalytic Efficiency by Using a Laccaic Acid-Modified Titanium Dioxide Photocatalyst

Montri Aiempanakit; Jariyaporn Sangkaworn; Nattawan Worawannotai; Kritapas Laohhasurayotin; Weerachai Sangchay; Sakchai Laksee; Cheewita SuwanchawalitJuniors Hollister Low Rise Denim Shorts Size 1

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Laccaic acid-modified TiO2 for enhancement of visible light-responsive photocatalytic efficiency.

https://dx.doi.org/10.21577/0103-5053.20220006

Published online: January 7, 2022

 

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J. Braz. Chem. Soc. 2022, 33(6), 550-555

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Lyvia N. B. Menezes ; Paulo A. Z. Suarez ; Grace F. Ghesti

How to cite this article

 

Three different fatty wastes were used to produce diesel-like biofuels, employing the waste-to-energy (WTE) processes of transesterification and pyrolysis.

https://dx.doi.org/10.21577/0103-5053.20220007

Published online: January 11, 2022

 

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Total access: 317


J. Braz. Chem. Soc. 2022, 33(6), 556-569

Synthesis and Anti-Chikungunya Virus (CHIKV) Activity of Novel 1,4-Naphthoquinone Sulfonamide and Sulfonate Ester Derivatives

Paulo A. F. Pacheco ; Daniel T. Gonzaga ; Cl�udio C. Cirne-Santos ; Caroline S. Barros ; Max W. L. Gomes; Rafaela S. P. Gomes; Mariana C. Gon�alves; Vitor F. Ferreira ; Vitor W. Rabelo ; Paula A. Abreu ; Robson X. Faria ; Gabriel O. de
Resende ; David R. da Rocha ; Izabel C. N. P. Paix�o ; Fernando C. da Silva

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In this work, we present the synthesis and antiviral evaluation of nineteen naphthoquinone derivatives, containing a sulfonamide or sulfonate group.

https://dx.doi.org/10.21577/0103-5053.20220010

Published online: January 12, 2022

 

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Total access: 373


J. Braz. Chem. Soc. 2022, 33(6), 570-581

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Karenn S. Fernandes ; Erickson O. dos Santos; Carla E. Batista; Igor O. Ribeiro; Victor P. Piracelli; Maria Cristina Solci ; Sergio Duvoisin Jr.; Scot T. Martin; Rodrigo A. F. Souza; Cristine M. D. Machado

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Investigation of the influence of black carbon (BC), levoglucosan and metal oxalate complexes on the origin and formation of water-soluble organic carbon (WSOC) in urban aerosol in the central Amazon.

https://dx.doi.org/10.21577/0103-5053.20220011

Published online: January 12, 2022

 

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J. Braz. Chem. Soc. 2022, 33(6), 582-588

Effects of Citrus Sudden Death Disease on Fatty Acid Profile of Orange Tree Bark

Rosilene A. Prestes; Luiz A. Colnago ; Emanuel Carrilho ; Nelson R. Antoniosi Filho; Maria Isabel R. Alves

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Citrus sudden death (CSD) is a disease that has affected millions of orange trees in Brazil. It is known that it interferes in triacylglycerides content in the barks of rootstock and scion close to the bud union. The effects of CSD on the fatty acid profiles were studied by gas chromatography.

https://dx.doi.org/10.21577/0103-5053.20220012

Published online: January 13, 2022

 

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J. Braz. Chem. Soc. 2022, 33(6), 589-599

Enhanced Catalytic Performance of Strontium-Doped Lanthanum Manganites by the Presence of Molybdenum Oxides for Electro-Reduction of Hydrogen Peroxide

Ludmila G. O. Xavier; Th�r�se C. Ebambi; Renata Diniz; Vanessa F. C. Lins; Luciano A. Montoro; Tulio Matencio

How to cite this article

 

The performance in the hydrogen peroxide reduction reaction and oxygen reduction reaction of two catalysts, lanthanum manganite strontium-doped perovskite without (LSM) and with (LSMMO) mixed molybdenum oxides, was investigated and, the LSMMO had more significant catalytic activity than LSM after polarization.

https://dx.doi.org/10.21577/0103-5053.20220016

Published online: January 19, 2022

 

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J. Braz. Chem. Soc. 2022, 33(6), 600-607

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Alexander Flacker ; Gabriela C. Gomes; Michele O. Silva; Ricardo C. Teixeira

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This work describes the pre-treatment process for electroless copper (Cu) deposition on polished alumina (Al2O3 99.9%) and the morphology of Cu plating by electroless deposition.

https://dx.doi.org/10.21577/0103-5053.20220017

Published online: January 25, 2022

 

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