Recent Papers - Machine Learning Special Issue
Reviews/Accounts - last 5 years
Cosmetic based on vegetable oils, such as sesame, peanut, sunflower and almonds, has beneficial properties to the human skin, and, for this reason, they are increasingly being used as moisturizers, emollients, regenerators and antioxidants, in bath oils, shampoos and hair conditioners, creams and lotions products. Nevertheless, these vegetable oils are made of high cost raw materials, and consequently they are targets of adulterations, especially with addition of soybean oil. Hence, people daily use in their body soybean oil, believing that they are taking care of their body health with other oils. This study evaluated the authenticity of Brazilian cosmetics based on vegetable oils with gas chromatography with flame ionization detection (GC-FID), and direct infusion by electrospray ionization mass spectrometry (ESI-MS). Details are presented in the Article Assessment of Adulteration of Cosmetics Based on Vegetable Oils by GC‑FID and Lipid Profile Using Direct Infusion Electrospray Ionization Mass Spectrometry (ESI-MS) by Jessica S. Pizzo, Marília B. Galuch, Patrícia D. S. Santos, Oscar O. Santos, Lorena Visentainer, Marcos N. Eberlin and Jesuí V. Visentainer on page 2457.
Jessica S. Pizzo; Marília B. Galuch; Patrícia D. S. Santos; Oscar O. Santos; Lorena Visentainer; Marcos N. Eberlin; Jesuí V. Visentainer
How to cite this articleCosmetic based on vegetable oils, such as sesame, peanut, sunflower and almonds, has beneficial properties to the human skin, and, for this reason, they are increasingly being used as moisturizers, emollients, regenerators and antioxidants, in bath oils, shampoos and hair conditioners, creams and lotions products. Nevertheless, these vegetable oils are made of high cost raw materials, and consequently they are targets of adulterations, especially with addition of soybean oil. Hence, people daily use in their body soybean oil, believing that they are taking care of their body health with other oils. This study evaluated the authenticity of Brazilian cosmetics based on vegetable oils with gas chromatography with flame ionization detection (GC-FID), and direct infusion by electrospray ionization mass spectrometry (ESI-MS). Details are presented in the Article Assessment of Adulteration of Cosmetics Based on Vegetable Oils by GC‑FID and Lipid Profile Using Direct Infusion Electrospray Ionization Mass Spectrometry (ESI-MS) by Jessica S. Pizzo, Marília B. Galuch, Patrícia D. S. Santos, Oscar O. Santos, Lorena Visentainer, Marcos N. Eberlin and Jesuí V. Visentainer on page 2457.
Francisco W. S. Lucas; Lucia H. Mascaro
How to cite this article
TlCu2Se2 texturized film was electrodeposited with [004] crystalline plane oriented parallel to the substrate surface. This texturization can also be associated with the films morphology.
Jessica S. Pizzo; Marília B. Galuch; Patrícia D. S. Santos; Oscar O. Santos; Lorena Visentainer; Marcos N. Eberlin; Jesuí V. Visentainer
How to cite this article
Vegetable oils have been applied to human skin for cosmetic purposes for a long time. However, they are targets of adulterations, especially with addition of oils with low cost. This study will evaluate the authenticity of Brazilian cosmetics based on vegetable oils.
Wilson T. Fonseca; Leandro A. R. Ribeiro; Lauro A. Pradela-Filho; Regina M. Takeuchi; André L. Santos
How to cite this article
Carbon paste electrodes modified with Bi anchored on Amberlite® IR120 enable fast Zn2+ determination in multivitamin and antiseptic dusting powder samples.
Tatiana C. Tolosa; Hervé Rogez; Evaldo M. Silva; Jesus N. S. Souza
How to cite this article
The acid hydrolysis of glycosylated flavonols were optimized and the hydrolytic process used is effective and applicable to plant extract (Inga edulis leaves).
Remon M. Zaki; Adel M. Kamal El-Dean; Shaban M. Radwan; Ahmed F. Saber
How to cite this article
In the present work, we have provided an easy access for synthesis of novel thienopyrazole compounds, which were used as starting materials for building new heterocyclic systems namely: pyrazole, triazole and triazine, attached or fused to the thienopyrazole moiety that have revealed remarkable antimicrobial and anti-inflammatory activities.
José C. L. Sousa; Marcelo G. Vivas; Jefferson L. Ferrari; Marco A. Schiavon
How to cite this article
Color map representing the emission vs. excitation wavelengths for different synthesis times of CdTe:Zn2+ quantum dots (QDs), and the normalized characteristic emission spectra obtained from the evolving factor analysis/multivariate curve resolution alternating least squares (EFA/MCR-ALS) method for each QD solution show the different sizes of the nanoparticles.
Rafael G. Silveira; Anderson J. L. Catao; Beatriz N. Cunha; Fernando Almeida; Rodrigo S. Correa; Luan F. Diniz; Juan C. Tenório; Javier Ellena; Aleksey E. Kuznetso; Alzir A. Batista; Edésio Alcântara
How to cite this article
Simple synthesis path for obtaining a symmetric thiourea, the theoretical characterization and verification of the intermolecular interactions obtained by X-ray crystallography.
Gabriel R. A. Carneiro; Andressa M. S. Silva; Raquel M. Cavalcante; Monica C. Padilha; Francisco R. de Aquino Neto; Henrique M. G. Pereira; Vinícius F. Sardela
How to cite this article
Straightforward method for ephedrine quantification based on gas chromatography mass spectrometry (GC-MS), without cleanup, and optimized by multivariate Doehlert matrix.
Evelyn M. C. Peñaloza; Livia M. Casanova; Ivana C. R. Leal; Paula F. de Aguiar; Sônia S. Costa
How to cite this article
Crude aqueous extracts of aerial and underground parts of Eleusine indica populations from four different localities were analyzed by high-performance liquid chromatography with diode array detection (HPLC-DAD), ultra-performance liquid chromatography with diode array detector and mass spectrometry (UPLC-DAD-MS/MS) and nuclear magnetic resonance (NMR) spectroscopy.
Alexsandro A. Matias; César Reis; Efraim L. Reis; Cláudio M. Silva; Odilaine I. C. Damasceno; Antônio A. Neves
How to cite this article
The plasma is produced between two electrodes immersed in the pulp mill effluent, at 585 V and 200 mA, producing various types of reactive agents, that were used to breakdown diverse organic compounds.
Mariana F. L. P. Carlos; Arthur Valbon; Marcelo A. Neves; Margareth R. L. Santos; Aurea Echevarria
How to cite this article
American Iron and Steel Institute (AISI) 1020 carbon steel in 0.5 mol L-1 HCl in absence (blank) and presence of 1 × 10-2 mol L-1 ethyl-(2Z)-3-[(2-phenylethyl)amino]but-2-enoate (EN1).
Larissa M. Oliveira; Janay S. C. Araújo; David B. Costa Júnior; Manoelito C. dos Santos Junior; Aníbal F. Santos Júnior; Franco H. A. Leite
How to cite this article
Virtual screening to select Trypanosoma cruzi farnesyl pyrophosphate synthase inhibitors.
Manuel Pastrana Restrepo; Elkin Galeano Jaramillo; Alejandro Martínez Martínez; Ana Mesa Arango; Sara Robledo Restrepo
How to cite this article
Bromo and chloro L-tyrosine derivatives actives against L. panamensis.
Camila R. Silva; Pedro P. Caldeira; Angela S. F. Nani; Emmanoel V. Silva-Filho
How to cite this article
The radium present in the soil decays originating 222Rn, a gas with high mobility that diffuses to the surface through pores, fissures in the soil and by the groundwater.
Jocinei Dognini; Luiz A. S. Madureira
How to cite this article
Alternative leaching process for the determination of benzene derivatives in petrochemical waste using headspace solid-phase micro-extraction gas chromatography-mass spectrometry (HS-SPME GC-MS).
Leomir A. S. de Lima; Camilo L. M. Morais; Jéssica T. Jales; Renata A. Gama; Sherlan G. Lemos; Kássio M. G. Lima
How to cite this article
Experimental procedure to obtain samples of fly larvae extract and subsequent analysis by differential pulse voltammetry with E / V vs. Ag/AgCl reference electrode and molecular fluorescence spectroscopy.
Kênia P. Costa; Stella F. do Valle; Thayana F. L. dos Santos; Ellen T. Rangel; Angelo C. Pinto; Paulo A. Z. Suarez; Michelle J. C. Rezende
How to cite this article
Biocide candidates from chemical transformations in triacylglycerides were evaluated against microorganisms which have been isolated from biodiesel/diesel blends. Four nitrated derivatives presented fungicidal activity.
Silvânio S. L. Costa; Ana C. L. Pereira; Elisangela A. Passos; José P. H. Alves; Carlos A. B. Garcia; Rennan G. O. Araujo
How to cite this article
In this work, the mineral composition of dry feeds for cat and dog was determined and evaluated according to regulatory agencies.
Carlos E. R. Senes; Nayara C. Saldan; Willian F. Costa; Terezinha I. E. Svidzinski; Cláudio C. Oliveira
How to cite this article
Fusarium oxysporum was cultivated in liquid and solid culture media. Using gas chromatography coupled to mass spectrometry (GC-MS), it was possible to identify secondary metabolites from liquid and solid culture media that can be used as chemical markers for this fungus.
Rosangela M. F. da Costa e Silva; Luciano R. S. Lara; Jorge L. López; Angela L. Andrade; Junnia A. C. Oliveira; Jacqueline A. Takahashi; Henriete S. Vieira; Tulio Matencio; Humberto O. Stumpf; Rosana Z. Domingues
How to cite this article
A novel methodology, fast, low-cost and scalable, without the use of organic solvents and with the dual use of soy lecithin to prepare stable magnetoliposomes (MGLs).
Gaspar Diaz-Muñoz; Izabel L. Miranda; Suélen K. Sartori; Gabriel N. S. Dias; Markus Kohlhoff; Gislaine A. Purgato; Marisa A. N. Diaz
How to cite this article
A novel one-pot sequence (in 2 or 3 steps) was developed for the synthesis of the tetrahydroquinoline alkaloids (±)-galipinine, (±)-cuspareine, (±)-galipeine and (±)-angustureine, and the derivative (±)-11-methoxy-5,6,6a,7,8,13-hexahydro-13a-aza-benzo[5,6]cyclohepta[1,2-a]naphthalene-12-ol from their respective Wittig adducts.
Andrey P. Jacomini; Michael J. V. da Silva; Julia Poletto; Gessica M. Ribeiro; Jessica T. C. Yokoyama; Danielle L. Bidóia; Fávero R. Paula; Celso V. Nakamura; Maria Helena Sarragiotto; Fernanda A. Rosa
How to cite this article
Synthesis of new series of pyrazolo[3,4-d]pyridazin-7-ones with antileishmanial activity and low toxicity against Leishmania amazonensis (strain WHOM/BR/75/JOSEFA), promastigote and amastigote forms.
Online version ISSN 1678-4790 Printed version ISSN 0103-5053
Journal of the Brazilian Chemical Society
JBCS Editorial and Publishing Office
University of Campinas - UNICAMP
13083-970 Campinas-SP, Brazil
Free access