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Aredes RS, Peixoto FC, Sphaier LA, Silva VNH, Duarte LM, de Carvalho Marques FF. Determination of carbohydrates in brewer's wort by capillary electrophoresis with indirect UV detection. J Food Compost Anal 2023. [DOI: 10.1016/j.jfca.2023.105321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/08/2023]
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2
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Lucas SB, Duarte LM, Rezende KCA, Coltro WKT. Nitrite Determination in Environmental Water Samples Using Microchip Electrophoresis Coupled with Amperometric Detection. Micromachines (Basel) 2022; 13:1736. [PMID: 36296090 PMCID: PMC9610075 DOI: 10.3390/mi13101736] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 10/07/2022] [Accepted: 10/11/2022] [Indexed: 06/16/2023]
Abstract
Nitrite is considered an important target analyte for environmental monitoring. In water resources, nitrite is the result of the nitrogen cycle and the leaching processes of pesticides based on nitrogenous compounds. A high concentration of nitrite can be associated with intoxication processes and metabolic disorders in humans. The present study describes the development of a portable analytical methodology based on microchip electrophoresis coupled with amperometric detection for the determination of nitrite in environmental water samples. Electrophoretic and detection conditions were optimized, and the best separations were achieved within 60 s by employing a mixture of 30 mmol L-1 lactic acid and 15 mmol L-1 histidine (pH = 3.8) as a running buffer applying 0.7 V to the working electrode (versus Pt) for amperometric measurements. The developed methodology revealed a satisfactory linear behavior in the concentration range between 20 and 80 μmolL-1 (R2 = 0.999) with a limit of detection of 1.3 μmolL-1. The nitrite concentration was determined in five water samples and the achieved values ranged from (28.7 ± 1.6) to (67.1 ± 0.5) µmol L-1. The data showed that using the proposed methodology revealed satisfactory recovery values (83.5-103.8%) and is in good agreement with the reference technique. Due to its low sample consumption, portability potential, high analytical frequency, and instrumental simplicity, the developed methodology may be considered a promising strategy to monitor and quantitatively determine nitrite in environmental samples.
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Affiliation(s)
| | - Lucas Mattos Duarte
- Instituto de Química, Universidade Federal de Goiás, Goiânia 74690-900, GO, Brazil
- Instituto de Química, Departamento de Química Analítica, Universidade Federal Fluminense, Niterói 24020-141, RJ, Brazil
| | | | - Wendell Karlos Tomazelli Coltro
- Instituto de Química, Universidade Federal de Goiás, Goiânia 74690-900, GO, Brazil
- Instituto Nacional de Ciência e Tecnologia de Bioanalítica (INCTBio), Campinas 13083-861, SP, Brazil
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3
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Duarte LM, Aredes RS, Amorim TL, de Carvalho Marques FF, de Oliveira MAL. Determination of α- and β-acids in hops by liquid chromatography or electromigration techniques: A critical review. Food Chem 2022; 397:133671. [PMID: 35908460 DOI: 10.1016/j.foodchem.2022.133671] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 07/06/2022] [Accepted: 07/08/2022] [Indexed: 01/12/2023]
Abstract
Hop plays an essential role in brewing beer and its study and analysis is of paramount importance. - and -acids are considered two of the most important hop components. While -acids are associated with the bitter flavor, -acids have antimicrobial effects. This work aims to critically review the published analytical methods for - and -acids determination in hops employing separation methods in liquid medium: liquid chromatography (LC) and capillary electrophoresis (CE). The types of hop samples, the optimized protocols to extract the hop acids, and the main instrumental conditions for both LC and CE techniques are highlighted and discussed. Specific and critical aspects of the - and β-acids separation by LC and CE and some challenges in this field are raised. Several key aspects discussed in this review may be of practical importance for brewers, whether in the microbrewery or industry and for researchers in the brewing field.
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Affiliation(s)
- Lucas Mattos Duarte
- Department of Chemistry, Institute of Exact Sciences, Federal University of Juiz de Fora, José Lourenço Kelmer, 36036-900 Juiz de Fora, MG, Brazil; Graduate Program in Chemistry (PPGQ-UFF) - Institute of Chemistry, Fluminense Federal University, Outeiro de São João Batista, s/n, 24020-141 Niterói, RJ, Brazil.
| | - Rafaella Silva Aredes
- Graduate Program in Chemistry (PPGQ-UFF) - Institute of Chemistry, Fluminense Federal University, Outeiro de São João Batista, s/n, 24020-141 Niterói, RJ, Brazil.
| | - Tatiane Lima Amorim
- Department of Chemistry, Institute of Exact Sciences, Federal University of Juiz de Fora, José Lourenço Kelmer, 36036-900 Juiz de Fora, MG, Brazil
| | - Flávia Ferreira de Carvalho Marques
- Graduate Program in Chemistry (PPGQ-UFF) - Institute of Chemistry, Fluminense Federal University, Outeiro de São João Batista, s/n, 24020-141 Niterói, RJ, Brazil.
| | - Marcone Augusto Leal de Oliveira
- Department of Chemistry, Institute of Exact Sciences, Federal University of Juiz de Fora, José Lourenço Kelmer, 36036-900 Juiz de Fora, MG, Brazil.
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4
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Tomazi T, Sumnicht M, Tomazi ACCH, Silva JCC, Bringhenti L, Duarte LM, Silva MMM, Rodrigues MX, Bicalho RC. Negatively controlled, randomized clinical trial comparing different antimicrobial interventions for treatment of clinical mastitis caused by gram-positive pathogens. J Dairy Sci 2020; 104:3364-3385. [PMID: 33358798 DOI: 10.3168/jds.2020-18830] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2020] [Accepted: 10/06/2020] [Indexed: 12/11/2022]
Abstract
The general objective of this study was to evaluate the effect of 3 intramammary antibiotic interventions using 2 commercially available antibiotics with narrow- or broad-spectrum activity on cure rates of clinical mastitis (CM) caused by gram-positive bacteria. We also compared the efficacy of treatment protocols, including a negative control, on outcomes at the cow and mammary quarter level. Before the onset of the study, 5,987 animals more than 12 mo old were randomly preassigned to 1 of 4 protocols in the event of gram-positive CM (except for Staphylococcus aureus and Trueperella pyogenes) during lactation: 3 infusions with 62.5 mg of amoxicillin performed 12 h apart (AMOX-L); 5 infusions once a day with 62.5 mg of amoxicillin (AMOX-EL); 5 infusions once a day with 125 mg of ceftiofur hydrochloride (CEFT-L); or negative control, no treatment performed until 5 d after diagnosis (NEG-CTR). Randomization was performed to preassign 90% of cows to one of the antibiotic protocols (30% in each group) and 10% to the negative control. A total of 696 quarter cases of CM met the inclusion criteria and were evaluated in the study. Quarter-level outcomes were assessed based on 5 milk samples collected up to 14 ± 3 d following enrollment (i.e., first day of treatment), whereas variables at the cow level [composite somatic cell count (SCC), milk production, and survival in the herd] were assessed up to 90 d after CM diagnosis. Streptococcus uberis, followed by Streptococcus dysgalactiae, were the main causes of gram-positive CM. Overall, clinical cure was higher for CEFT-L than for AMOX-EL, and no difference was observed between CEFT-L and AMOX-L. Likewise, no significant differences were detected on overall bacteriological cure, although some treatment effects were observed at the species level. Compared with antibiotic-treated groups, quarters assigned to NEG-CTR had higher counts of colony-forming units (cfu), 16S rRNA gene copy numbers, and Streptococcus relative abundance (RA) until d 5 after enrollment. Quarters treated with AMOX-L had higher cfu counts on d 5, 8, and 14 after enrollment compared with the other antibiotic protocols. In addition, the RA of Streptococcus spp. was higher on d 14 after enrollment for AMOX-treated quarters compared with the CEFT-L group. Linear score of SCC was higher for AMOX-treated cows than for CEFT-L in the first test day after CM. However, cows assigned to AMOX-L had higher milk production than those submitted to the AMOX-EL and CEFT-L protocols. In conclusion, the 2-d protocol with 3 intramammary infusions of amoxicillin (narrow-spectrum antimicrobial) had similar overall clinical and bacteriological cures as 5 administrations (once a day) with ceftiofur hydrochloride (wide spectrum). No significant difference was observed on CM recurrence and cow survival. However, quarters treated with 5-d protocols were more effective at reducing milk cfu counts than quarters in the AMOX-L protocol. In addition, lower Streptococcus spp. RA was observed in ceftiofur-treated quarters compared with the amoxicillin protocols at d 14 after CM diagnosis. Based on results of microbiome and bacterial load (quantitative PCR and cfu count) up to 5 d after CM diagnosis, antibiotic use remains an indispensable strategy for treatment of CM caused by gram-positive bacteria.
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Affiliation(s)
- T Tomazi
- Department of Population Medicine and Diagnostic Sciences, Cornell University, Ithaca, NY 14853-6401
| | - M Sumnicht
- Department of Population Medicine and Diagnostic Sciences, Cornell University, Ithaca, NY 14853-6401
| | - A C C H Tomazi
- Department of Population Medicine and Diagnostic Sciences, Cornell University, Ithaca, NY 14853-6401
| | - J C C Silva
- Department of Population Medicine and Diagnostic Sciences, Cornell University, Ithaca, NY 14853-6401
| | - L Bringhenti
- Department of Population Medicine and Diagnostic Sciences, Cornell University, Ithaca, NY 14853-6401
| | - L M Duarte
- Department of Population Medicine and Diagnostic Sciences, Cornell University, Ithaca, NY 14853-6401
| | - M M M Silva
- Department of Population Medicine and Diagnostic Sciences, Cornell University, Ithaca, NY 14853-6401
| | - M X Rodrigues
- Department of Population Medicine and Diagnostic Sciences, Cornell University, Ithaca, NY 14853-6401
| | - R C Bicalho
- Department of Population Medicine and Diagnostic Sciences, Cornell University, Ithaca, NY 14853-6401.
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Amorim TL, Duarte LM, da Silva EM, de Oliveira MAL. Capillary electromigration methods for fatty acids determination in vegetable and marine oils: A review. Electrophoresis 2020; 42:289-304. [PMID: 33169855 DOI: 10.1002/elps.202000260] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 10/23/2020] [Accepted: 11/05/2020] [Indexed: 11/12/2022]
Abstract
Fatty acids determination is of paramount importance for quality control and suitable labeling of edible oils, required by regulatory agencies in several countries, and fast methods for this determination are worldly desired. This review article aimed to explore the available analytical methods for vegetable and marine oils analyses employing CE, which can be a straightforward and faster alternative than GC methods for fatty acid determination, considering some purposes. CE usually offers the possibility of a rapid analysis with a simple preparation of the sample, without requiring specific columns, which are inherent advantages of the technique. Instrumental conditions and the key points about fatty acids determination employing the technique are highlighted, and the main challenges and perspectives are also approached. Potential use of CE for edible oil analyses has been demonstrated for research and routine, which can be of interest for industries, regulatory agencies, and edible oil researchers. Therefore, we have explored the analytical approaches described in the last decades, intending to spread the interest of CE methods for fatty acid monitoring, label accuracy assessment, and food authenticity evaluation of edible oils.
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Affiliation(s)
- Tatiane Lima Amorim
- Grupo de Química Analítica e Quimiometria (GQAQ), Departamento de Química, Universidade Federal de Juiz de Fora, Juiz de Fora, MG, Brazil
| | - Lucas Mattos Duarte
- Departamento de Química Analítica, Instituto de Química, Universidade Federal Fluminense, Niterói, RJ, Brazil
| | - Erick Mendes da Silva
- Grupo de Química Analítica e Quimiometria (GQAQ), Departamento de Química, Universidade Federal de Juiz de Fora, Juiz de Fora, MG, Brazil
| | - Marcone Augusto Leal de Oliveira
- Grupo de Química Analítica e Quimiometria (GQAQ), Departamento de Química, Universidade Federal de Juiz de Fora, Juiz de Fora, MG, Brazil
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6
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Duarte LM, Amorim TL, Grazul RM, de Oliveira MAL. Differentiation of aromatic, bittering and dual-purpose commercial hops from their terpenic profiles: An approach involving batch extraction, GC-MS and multivariate analysis. Food Res Int 2020; 138:109768. [PMID: 33292948 DOI: 10.1016/j.foodres.2020.109768] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 09/08/2020] [Accepted: 09/29/2020] [Indexed: 01/13/2023]
Abstract
Terpenes are one of the main classes of compounds in hops (Humulus lupulus, L). They play an important role in brewing due to their central function, which is related to beer aroma. A screening of terpenes in several commercial hop varieties was carried out by gas chromatography coupled to mass spectrometry after employing a simple, straightforward and high throughput extraction method. A single batch extraction, using hexane as solvent, was employed to obtain the terpenic fraction of the hop samples. Nineteen terpenes were identified in analyzed samples with β-myrcene (2.22-45.30%), α-humulene (20.20-67.64%), and β-caryophyllene (9.97-24.62%) being the major terpenes in all samples. The studied system was multivariate modeled by principal component analysis. Based on the proposed approach, it was possible to correlate the terpenic hop profiles to their specific purpose in the brewing industry and to distinguish aromatic hops (high α-humulene content), bittering hops (high β-myrcene content), and dual-purpose hops (more complex and intermediate terpenic profile) among the samples.
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Affiliation(s)
- Lucas Mattos Duarte
- Grupo de Química Analítica e Quimiometria (GQAQ), Departamento de Química, Universidade Federal de Juiz de Fora, 36036900 Juiz de Fora, MG, Brazil; Departamento de Química Analítica, Instituto de Química, Universidade Federal Fluminense, 24020-141 Niterói, RJ, Brazil
| | - Tatiane Lima Amorim
- Grupo de Química Analítica e Quimiometria (GQAQ), Departamento de Química, Universidade Federal de Juiz de Fora, 36036900 Juiz de Fora, MG, Brazil
| | - Richard Michael Grazul
- Laboratório de Pesquisa em Química Medicinal e Produtos Naturais, Departamento de Química, Universidade Federal de Juiz de Fora, 36036900 Juiz de Fora, MG, Brazil
| | - Marcone Augusto Leal de Oliveira
- Grupo de Química Analítica e Quimiometria (GQAQ), Departamento de Química, Universidade Federal de Juiz de Fora, 36036900 Juiz de Fora, MG, Brazil.
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Amorim TL, Duarte LM, de Oliveira MAL, de la Fuente MA, Gómez-Cortés P. Prediction of Fatty Acids in Chocolates with an Emphasis on C18:1 trans Fatty Acid Positional Isomers Using ATR-FTIR Associated with Multivariate Calibration. J Agric Food Chem 2020; 68:10893-10901. [PMID: 32870685 DOI: 10.1021/acs.jafc.0c04316] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
This work aimed to predict C18:1 TFA isomers as well as other groups of fatty acids (saturated, monounsaturated, polyunsaturated, and total TFA) in chocolates by ATR-FTIR and partial least square regression. The quantification of fatty acids in representative samples (white, dark, and milk chocolates) was rapid (<30 s) and did not require derivatization. The optimized models showed satisfactory linear correlations compared to a reference gas chromatographic method. Coefficients of correlation for prediction considering C18:1 positional isomers were 0.973 (trans 6-8), 0.991 (trans 9), 0.991 (trans 10), 0.988 (trans 11), and 0.998 (trans 12). When considering fatty acids groups, these coefficients ranged from 0.965 to 0.999. The obtained results indicate that this straightforward procedure is suitable for chocolate analysis, for determining its general lipid composition and TFA isomeric profile, which would be of great interest for quality control programs in the face of the new TFA regulations.
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Affiliation(s)
- Tatiane Lima Amorim
- Instituto de Investigación en Ciencias de la Alimentación (CIAL, CSIC-UAM), Universidad Autónoma de Madrid, Nicolás Cabrera, 9, Madrid 28049, Spain
- Grupo de Química Analítica e Quimiometria (GQAQ), Departamento de Química, Universidade Federal de Juiz de Fora, José Lourenço Kelmer, Juiz de Fora, Minas Gerais 36036-900, Brazil
| | - Lucas Mattos Duarte
- Grupo de Química Analítica e Quimiometria (GQAQ), Departamento de Química, Universidade Federal de Juiz de Fora, José Lourenço Kelmer, Juiz de Fora, Minas Gerais 36036-900, Brazil
- Departamento de Química Analítica, Instituto de Química, Universidade Federal Fluminense, Niterói, Rio de Janeiro 24020-141, Brazil
| | - Marcone Augusto Leal de Oliveira
- Grupo de Química Analítica e Quimiometria (GQAQ), Departamento de Química, Universidade Federal de Juiz de Fora, José Lourenço Kelmer, Juiz de Fora, Minas Gerais 36036-900, Brazil
| | - Miguel Angel de la Fuente
- Instituto de Investigación en Ciencias de la Alimentación (CIAL, CSIC-UAM), Universidad Autónoma de Madrid, Nicolás Cabrera, 9, Madrid 28049, Spain
| | - Pilar Gómez-Cortés
- Instituto de Investigación en Ciencias de la Alimentación (CIAL, CSIC-UAM), Universidad Autónoma de Madrid, Nicolás Cabrera, 9, Madrid 28049, Spain
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da Silva NP, Carmo Rapozo Lavinas Pereira ED, Duarte LM, de Oliveira Freitas JC, de Almeida CG, da Silva TP, Melo RCN, Morais Apolônio AC, de Oliveira MAL, de Mello Brandão H, Pittella F, Fabri RL, Tavares GD, de Faria Pinto P. Improved anti-Cutibacterium acnes activity of tea tree oil-loaded chitosan-poly(ε-caprolactone) core-shell nanocapsules. Colloids Surf B Biointerfaces 2020; 196:111371. [PMID: 32980571 DOI: 10.1016/j.colsurfb.2020.111371] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2020] [Revised: 08/20/2020] [Accepted: 08/31/2020] [Indexed: 11/16/2022]
Abstract
The purpose of this study was to develop tea tree oil (TTO)-loaded chitosan-poly(ε-caprolactone) core-shell nanocapsules (NC-TTO-Ch) aiming the topical acne treatment. TTO was analyzed by gas chromatography-mass spectrometry, and nanocapsules were characterized regarding mean particle size (Z-average), polydispersity index (PdI), zeta potential (ZP), pH, entrapment efficiency (EE), morphology by Atomic Force Microscopy (AFM), and anti-Cutibacterium acnes activity. The main constituents of TTO were terpinen-4-ol (37.11 %), γ-terpinene (16.32 %), α-terpinene (8.19 %), ρ-cimene (6.56 %), and α-terpineol (6.07 %). NC-TTO-Ch presented Z-average of 268.0 ± 3.8 nm and monodisperse size distribution (PdI < 0.3). After coating the nanocapsules with chitosan, we observed an inversion in ZP to a positive value (+31.0 ± 1.8 mV). This finding may indicate the presence of chitosan on the nanocapsules' surface, which was corroborated by the AFM images. In addition, NC-TTO-Ch showed a slightly acidic pH (∼5.0), compatible with topical application. The EE, based on Terpinen-4-ol concentration, was approximately 95 %. This data suggests the nanocapsules' ability to reduce the TTO volatilization. Furthermore, NC-TTO-Ch showed significant anti-C. acnes activity, with a 4× reduction in the minimum inhibitory concentration, compared to TTO and a decrease in C. acnes cell viability, with an increase in the percentage of dead cells (17 %) compared to growth control (6.6 %) and TTO (9.7 %). Therefore, chitosan-poly(ε-caprolactone) core-shell nanocapsules are a promising tool for TTO delivery, aiming at the activity against C. acnes for the topical acne treatment.
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Affiliation(s)
- Natália Prado da Silva
- Protein Structure and Function Study Laboratory, Department of Biochemistry, Institute of Biological Sciences, Federal University of Juiz de Fora, Juiz de Fora, MG, Brazil; Laboratory of Nanostructured Systems Development, Department of Pharmaceutical Science, Federal University of Juiz de Fora, Juiz de Fora, MG, Brazil
| | - Eloá do Carmo Rapozo Lavinas Pereira
- Laboratory of Nanostructured Systems Development, Department of Pharmaceutical Science, Federal University of Juiz de Fora, Juiz de Fora, MG, Brazil
| | - Lucas Mattos Duarte
- Group of Analytical Chemistry and Chemometrics, Department of Chemistry, Institute of Exact Sciences, Federal University of Juiz de Fora, Juiz de Fora, MG, Brazil; Department of Analytical Chemistry, Institute of Chemistry, Fluminense Federal University, Niterói, Rio de Janeiro, 24020-121, Brazil
| | - Jhamine Caroline de Oliveira Freitas
- Protein Structure and Function Study Laboratory, Department of Biochemistry, Institute of Biological Sciences, Federal University of Juiz de Fora, Juiz de Fora, MG, Brazil; Bioactive Natural Products Laboratory, Department of Biochemistry, Institute of Biological Sciences, Federal University of Juiz de Fora, Juiz de Fora, MG, Brazil
| | | | - Thiago Pereira da Silva
- Laboratory of Cellular Biology, Department of Biology, Institute of Biological Sciences, Federal University of Juiz de Fora, Juiz de Fora, MG, Brazil
| | - Rossana C N Melo
- Laboratory of Cellular Biology, Department of Biology, Institute of Biological Sciences, Federal University of Juiz de Fora, Juiz de Fora, MG, Brazil
| | - Ana Carolina Morais Apolônio
- Department of Parasitology, Microbiology and Immunology, Institute of Biological Sciences, Federal University of Juiz de Fora, Juiz de Fora, MG, Brazil
| | - Marcone Augusto Leal de Oliveira
- Group of Analytical Chemistry and Chemometrics, Department of Chemistry, Institute of Exact Sciences, Federal University of Juiz de Fora, Juiz de Fora, MG, Brazil
| | - Humberto de Mello Brandão
- Laboratory of Nanotechnology, Brazilian Agricultural Research Corporation (EMBRAPA), Juiz de Fora, Brazil
| | - Frederico Pittella
- Laboratory of Nanostructured Systems Development, Department of Pharmaceutical Science, Federal University of Juiz de Fora, Juiz de Fora, MG, Brazil
| | - Rodrigo Luiz Fabri
- Bioactive Natural Products Laboratory, Department of Biochemistry, Institute of Biological Sciences, Federal University of Juiz de Fora, Juiz de Fora, MG, Brazil
| | - Guilherme Diniz Tavares
- Laboratory of Nanostructured Systems Development, Department of Pharmaceutical Science, Federal University of Juiz de Fora, Juiz de Fora, MG, Brazil.
| | - Priscila de Faria Pinto
- Protein Structure and Function Study Laboratory, Department of Biochemistry, Institute of Biological Sciences, Federal University of Juiz de Fora, Juiz de Fora, MG, Brazil
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Duarte LM, Amorim TL, Adriano LHC, de Oliveira MAL. A CZE-UV Method for Saturated and Unsaturated Fatty Acids Determination in Hops. Journal of the American Society of Brewing Chemists 2019. [DOI: 10.1080/03610470.2019.1678377] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Lucas Mattos Duarte
- Grupo de Química Analítica e Quimiometria (GQAQ), Departamento de Química, Universidade Federal de Juiz de Fora, José Lourenço Kelmer, Juiz de Fora, Brazil
| | - Tatiane Lima Amorim
- Grupo de Química Analítica e Quimiometria (GQAQ), Departamento de Química, Universidade Federal de Juiz de Fora, José Lourenço Kelmer, Juiz de Fora, Brazil
| | - Luiz Henrique Cantarino Adriano
- Grupo de Química Analítica e Quimiometria (GQAQ), Departamento de Química, Universidade Federal de Juiz de Fora, José Lourenço Kelmer, Juiz de Fora, Brazil
| | - Marcone Augusto Leal de Oliveira
- Grupo de Química Analítica e Quimiometria (GQAQ), Departamento de Química, Universidade Federal de Juiz de Fora, José Lourenço Kelmer, Juiz de Fora, Brazil
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Amorim TL, Duarte LM, Chellini PR, de Oliveira MAL. A validated capillary electrophoresis method for fatty acid determination in encapsulated vegetable oils supplements. Lebensm Wiss Technol 2019. [DOI: 10.1016/j.lwt.2019.108380] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Amorim TL, Duarte LM, Dos Santos HF, de Oliveira MAL. Screening method for simultaneous detection of elaidic and vaccenic trans fatty acid isomers by capillary zone electrophoresis. Anal Chim Acta 2019; 1048:212-220. [DOI: 10.1016/j.aca.2018.10.057] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 10/22/2018] [Accepted: 10/23/2018] [Indexed: 12/27/2022]
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12
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Caneschi W, Enes KB, Carvalho de Mendonça C, de Souza Fernandes F, Miguel FB, da Silva Martins J, Le Hyaric M, Pinho RR, Duarte LM, Leal de Oliveira MA, Dos Santos HF, Paz Lopes MT, Dittz D, Silva H, Costa Couri MR. Synthesis and anticancer evaluation of new lipophilic 1,2,4 and 1,3,4-oxadiazoles. Eur J Med Chem 2019; 165:18-30. [PMID: 30654237 DOI: 10.1016/j.ejmech.2019.01.001] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Revised: 12/30/2018] [Accepted: 01/01/2019] [Indexed: 12/12/2022]
Abstract
A series of1,2,4- and 1,3,4-oxadiazole derivatives were synthesized and evaluated for their anticancer activity. Halogenated 1,2,4-oxadiazoles were obtained from benzonitrile and coupled either lipophilic amines or with aminoalcohols. Lipophilic 1,3,4-oxadiazole derivatives were obtained through the Mannich reactions between 5-(aryl)-1,3,4-oxadiazole-2-thiol and alkylated or acylated amines. The in vitro cytotoxic effects were evaluated against 4T1- mammary carcinoma and CT26 - colon cancer cells. The best results were obtained for the 1,3,4-oxadiazole coupled to alkylated piperazine with 10-14 carbon chain moiety, with IC50 values ranging from 1.6 to 3.55μΜ for the 4T1 cell line, and from 1.6 to 3.9 μM for the CT26.WT cell line, and selectivity index up to 19. The most potent compounds were investigated with AnnexinV and PI staining as indicative of apoptosis induction.
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Affiliation(s)
- Wiliam Caneschi
- Departamento de Química, ICE, Universidade Federal de Juiz de Fora, Campus Martelo, CEP 36036-330, Juiz de Fora, MG, Brazil
| | - Karine Braga Enes
- Departamento de Química, ICE, Universidade Federal de Juiz de Fora, Campus Martelo, CEP 36036-330, Juiz de Fora, MG, Brazil
| | - Camille Carvalho de Mendonça
- Departamento de Química, ICE, Universidade Federal de Juiz de Fora, Campus Martelo, CEP 36036-330, Juiz de Fora, MG, Brazil
| | - Fábio de Souza Fernandes
- Departamento de Química, ICE, Universidade Federal de Juiz de Fora, Campus Martelo, CEP 36036-330, Juiz de Fora, MG, Brazil
| | - Fabio Balbino Miguel
- Departamento de Química, ICE, Universidade Federal de Juiz de Fora, Campus Martelo, CEP 36036-330, Juiz de Fora, MG, Brazil
| | - Jefferson da Silva Martins
- Departamento de Física, ICE, Universidade Federal de Juiz de Fora, Campus Martelo, CEP 36036-330, Juiz de Fora, MG, Brazil
| | - Mireille Le Hyaric
- Departamento de Química, ICE, Universidade Federal de Juiz de Fora, Campus Martelo, CEP 36036-330, Juiz de Fora, MG, Brazil
| | - Roberto Rosas Pinho
- Departamento de Física, ICE, Universidade Federal de Juiz de Fora, Campus Martelo, CEP 36036-330, Juiz de Fora, MG, Brazil
| | - Lucas Mattos Duarte
- Departamento de Química, ICE, Universidade Federal de Juiz de Fora, Campus Martelo, CEP 36036-330, Juiz de Fora, MG, Brazil
| | | | - Hélio F Dos Santos
- Departamento de Química, ICE, Universidade Federal de Juiz de Fora, Campus Martelo, CEP 36036-330, Juiz de Fora, MG, Brazil
| | - Miriam Teresa Paz Lopes
- Departamento de Farmacologia, ICB, Universidade Federal de Minas Gerais, Pampulha, CEP 31270-901, Belo Horizonte, MG, Brazil
| | - Dalton Dittz
- Departamento de Farmacologia, ICB, Universidade Federal de Minas Gerais, Pampulha, CEP 31270-901, Belo Horizonte, MG, Brazil
| | - Heveline Silva
- Departamento de Química, Universidade Federal de Minas Gerais, Pampulha, CEP 31270-901, Belo Horizonte, MG, Brazil
| | - Mara Rubia Costa Couri
- Departamento de Química, ICE, Universidade Federal de Juiz de Fora, Campus Martelo, CEP 36036-330, Juiz de Fora, MG, Brazil.
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Duarte LM, Amorim TL, Chellini PR, Adriano LHC, de Oliveira MAL. Sub-minute determination of rifampicin and isoniazid in fixed dose combination tablets by capillary zone electrophoresis with ultraviolet absorption detection. J Sep Sci 2018; 41:4533-4543. [DOI: 10.1002/jssc.201800673] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Revised: 10/11/2018] [Accepted: 10/13/2018] [Indexed: 01/26/2023]
Affiliation(s)
- Lucas Mattos Duarte
- Analytical chemistry and chemometrics group - GQAQ, Department of Chemistry; Federal University of Juiz de Fora; Juiz de Fora MG Brazil
| | - Tatiane Lima Amorim
- Analytical chemistry and chemometrics group - GQAQ, Department of Chemistry; Federal University of Juiz de Fora; Juiz de Fora MG Brazil
| | - Paula Rocha Chellini
- Department of Pharmaceutical Sciences, Pharmacy Faculty; Federal University of Juiz de Fora; Juiz de Fora MG Brazil
| | - Luiz Henrique Cantarino Adriano
- Analytical chemistry and chemometrics group - GQAQ, Department of Chemistry; Federal University of Juiz de Fora; Juiz de Fora MG Brazil
| | - Marcone Augusto Leal de Oliveira
- Analytical chemistry and chemometrics group - GQAQ, Department of Chemistry; Federal University of Juiz de Fora; Juiz de Fora MG Brazil
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14
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Duarte LM, Adriano LHC, de Oliveira MAL. Capillary electrophoresis in association with chemometrics approach for bitterness hop (Humulus lupulus L
.) classification. Electrophoresis 2018; 39:1399-1409. [DOI: 10.1002/elps.201700420] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2017] [Revised: 02/09/2018] [Accepted: 02/10/2018] [Indexed: 01/16/2023]
Affiliation(s)
- Lucas Mattos Duarte
- Grupo de Química Analítica e Quimiometria - GQAQ, Department of Chemistry, Institute of Exact Sciences, Federal University of Juiz de Fora; University city; Juiz de Fora MG Brazil
| | - Luiz Henrique Cantarino Adriano
- Grupo de Química Analítica e Quimiometria - GQAQ, Department of Chemistry, Institute of Exact Sciences, Federal University of Juiz de Fora; University city; Juiz de Fora MG Brazil
| | - Marcone Augusto Leal de Oliveira
- Grupo de Química Analítica e Quimiometria - GQAQ, Department of Chemistry, Institute of Exact Sciences, Federal University of Juiz de Fora; University city; Juiz de Fora MG Brazil
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15
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Queiroz MLDV, Barbosa Filho JAD, Duarte LM, Brasil DDF, Gadelha CRF. Environmental and physiological variables during the catching of broilers. Rev Bras Cienc Avic 2015. [DOI: 10.1590/1516-635x170137-44] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
| | | | - LM Duarte
- Universidade Federal do Ceará, Brasil
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Abstract
The construct of self-silencing was proposed to account for women's greater vulnerability to developing depression. This study of 1,117 students (795 women and 322 men) explored possible explanations for the empirical finding that men self-silence to the same or greater extent than women. Analysis showed that men reported more self-silencing than women. A factor analysis confirmed the subscale structure of the Silencing the Self Scale for women and men, with relatively few departures from the originally proposed subscales. Depression and self-silencing scores were correlated positively for both men and women. The results of two multiple regressions, performed separately for men and women, showed that depressive symptomatology accounted for a significant percentage of the variance in self-silencing but that social desirability did not account for a significant increment in the variance accounted for in silencing the self. The scores on the Care as Self-sacrifice and the Divided Self subscales were intercorrelated for women, but not for men, indicating that there may be a sex difference in perception of self-silencing behavior.
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Affiliation(s)
- L M Duarte
- Faculty of Education, Simon Fraser University, Burnaby, British Columbia, Canada
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Wall DA, Noffsinger JM, Mueckl KA, Alonso JM, Regan DM, Johnson CE, Weinstein DL, Duarte LM, Winn HN. Feasibility of an obstetrician-based cord blood collection network for unrelated donor umbilical cord blood banking. J Matern Fetal Med 1997; 6:320-3. [PMID: 9438213 DOI: 10.1002/(sici)1520-6661(199711/12)6:6<320::aid-mfm4>3.0.co;2-q] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The purpose of this study was to evaluate the feasibility of an obstetrician-based cord blood collection system for the purpose of banking cord blood for unrelated donor hematopoietic stem cell transplantation. Over 200 delivering physicians and 40 area obstetrical units were educated and became involved in the collection of cord blood during the third stage of labor. These products compared favorable with those obtained after placental delivery. Issues involved in the development of quality assurance for unrelated donor banking are discussed. An obstetrician-based cord blood collection network is feasible and advantageous in that cord blood can be collected from a wider variety of communities, thus enhancing the ethnic diversity of a bank.
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Affiliation(s)
- D A Wall
- Department of Pediatrics, St. Louis University Health Sciences Center, Cardinal Glennon Children's Hospital, Missouri 63104, USA
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