1
|
Rosa APA, Onça LO, Gomes AA, de A Maranhão T. Second-order calibration high-resolution continuum source graphite furnace molecular absorption spectrometry-based determination of bromine and fluorine. Talanta 2024; 270:125605. [PMID: 38176251 DOI: 10.1016/j.talanta.2023.125605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 08/14/2023] [Revised: 12/21/2023] [Accepted: 12/26/2023] [Indexed: 01/06/2024]
Abstract
In this study, we report the simultaneous determination of bromine and fluorine using Second-Order Calibration High-Resolution Continuum Source Graphite Furnace Molecular Absorption Spectrometry (HR CS MAS). The instrumental data acquired correspond to the time versus wavelength matrix per sample that were analyzed using Parallel Factor Analysis (PARAFAC), along with Unfold and N-way Partial Least Squares combined with a post-calibration step known as Residual Bilinearization (U and N PLS/RBL). Despite the significant difference in sensitivity between bromine and fluorine, all approaches provided reasonably accurate results when predicting both analytes in synthetic mixtures within a controlled environment. The relative prediction error (REP) values for bromine were 29.8 % (PARAFAC), 23.6 % (N-PLS/RBL), and 13.1 % (U-PLS/RBL), while for fluorine, the REP values were 3.4 % (PARAFAC), 3.5 % (N-PLS/RBL), and 3.2 % (U-PLS/RBL). When applying this approach to predict unknown samples, a comparison was made between the estimated nominal concentrations of fluorine and bromine obtained using either a reference method or based on labeled values or spiked mass, and those obtained using the proposed method. It was observed that PARAFAC was unable to predict the samples accurately, whereas the REP values for the prediction of bromine and fluorine using N-PLS/RBL and U-PLS/RBL methods were 19.3 %/19.2 % and 13.6 %/13.1 %, respectively.
Collapse
Affiliation(s)
- Amauri P A Rosa
- Universidade Federal de Santa Catarina, Departamento de Química Analítica, Campus Trindade, 88040-900, Florianópolis, Santa Catarina, Brazil
| | - Larissa Oliveira Onça
- Instituto de Química, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves, 9500, 91501-970, Porto Alegre, RS, Brazil
| | - Adriano A Gomes
- Instituto de Química, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves, 9500, 91501-970, Porto Alegre, RS, Brazil.
| | - Tatiane de A Maranhão
- Universidade Federal de Santa Catarina, Departamento de Química Analítica, Campus Trindade, 88040-900, Florianópolis, Santa Catarina, Brazil.
| |
Collapse
|
2
|
Koljančić N, Onça L, Khvalbota L, Vyviurska O, Gomes AA, Špánik I. Region of interest selection in heterogeneous digital image: Wine age prediction by comprehensive two-dimensional gas chromatography. Curr Res Food Sci 2024; 8:100725. [PMID: 38590691 PMCID: PMC11000173 DOI: 10.1016/j.crfs.2024.100725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Revised: 03/12/2024] [Accepted: 03/25/2024] [Indexed: 04/10/2024] Open
Abstract
This study integrates genetic algorithm (GA) with partial least squares regression (PLSR) and various variable selection methods to identify impactful regions of interest (ROI) in heterogeneous 2D chromatogram images for predicting wine age. As wine quality and aroma evolve over time, transitioning from youthful fruitiness to mature, complex flavors, which leads to alterations in the composition of essential aroma-contributing compounds. Chromatograms are segmented into subimages, and the GA-PLSR algorithm optimizes combinations based on grayscale, red-green-blue (RGB), and hue-saturation-value (HSV) histograms. The selected subimage histograms are further refined through interval selection, highlighting the compounds with the most significant influence on wine aging. Experimental validation involving 38 wine samples demonstrates the effectiveness of this approach. Cross-validation reduces the PLS model error from 2.8 to 2.4 years within a 10 × 10 subset, and during prediction, the error decreases from 2.5 to 2.3 years. The study presents a novel approach utilizing the selection of ROI for efficient processing of 2D chromatograms focusing on predicting wine age.
Collapse
Affiliation(s)
- Nemanja Koljančić
- Institute of Analytical Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, 812 37, Bratislava, Slovakia
| | - Larissa Onça
- Institute of Analytical Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, 812 37, Bratislava, Slovakia
- Instituto de Química, Universidade Federal Do Rio Grande Do Sul, Avenida Bento Gonçalves, 9500, 91501-970, Porto Alegre, RS, Brazil
| | - Liudmyla Khvalbota
- Institute of Analytical Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, 812 37, Bratislava, Slovakia
| | - Olga Vyviurska
- Institute of Analytical Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, 812 37, Bratislava, Slovakia
| | - Adriano A. Gomes
- Institute of Analytical Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, 812 37, Bratislava, Slovakia
- Instituto de Química, Universidade Federal Do Rio Grande Do Sul, Avenida Bento Gonçalves, 9500, 91501-970, Porto Alegre, RS, Brazil
| | - Ivan Špánik
- Institute of Analytical Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, 812 37, Bratislava, Slovakia
| |
Collapse
|
3
|
Junges CH, Guerra CC, Gomes AA, Ferrão MF. Multiblock data applied in organic grape juice authentication by one-class classification OC-PLS. Food Chem 2024; 436:137695. [PMID: 37857206 DOI: 10.1016/j.foodchem.2023.137695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 06/08/2023] [Revised: 09/27/2023] [Accepted: 10/06/2023] [Indexed: 10/21/2023]
Abstract
A new strategy has been developed to enhance the assessment of the authenticity of whole grape juice within the organic class. This approach is based on the analysis of data from different analytical sources. The novel method employs a multiblock regression technique, specifically the one-class partial least squares (OC-PLS) classifier, to establish a relationship between each predictor block and the response variable. Sequential calculations are performed after orthogonalization with respect to the preceding regression scores. The proposed method has demonstrated effectiveness in detecting targeted samples. The results achieved of the best models for the test set had rates of up to 100 % sensitivity, 89 % specificity, and 83 % accuracy. To compare with the multiblock models, the DD-SIMCA method was employed, but it yielded inferior results when applied to visible data. The multiblock approach proved to be efficient in evaluating from different datasets of varied sources to classification of organic grape juice.
Collapse
Affiliation(s)
- Carlos H Junges
- Laboratório de Quimiometria e Instrumentação Analítica (LAQIA), Instituto de Química, Universidade Federal do Rio Grande do Sul (UFRGS), Avenida Bento Gonçalves, 9500, Porto Alegre, Rio Grande do Sul (RS), CEP 91501-970, Brazil.
| | - Celito C Guerra
- Laboratório de Cromatografia e Espectrometria de Massas (LACEM), Unidade Uva e Vinho, Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA), Rua Livramento, 515, Bento Gonçalves, Rio Grande do Sul, CEP 95701-008, Brazil
| | - Adriano A Gomes
- Laboratório de Quimiometria e Instrumentação Analítica (LAQIA), Instituto de Química, Universidade Federal do Rio Grande do Sul (UFRGS), Avenida Bento Gonçalves, 9500, Porto Alegre, Rio Grande do Sul (RS), CEP 91501-970, Brazil
| | - Marco F Ferrão
- Laboratório de Quimiometria e Instrumentação Analítica (LAQIA), Instituto de Química, Universidade Federal do Rio Grande do Sul (UFRGS), Avenida Bento Gonçalves, 9500, Porto Alegre, Rio Grande do Sul (RS), CEP 91501-970, Brazil; Instituto Nacional de Ciência e Tecnologia-Bioanalítica (INCT-Bioanalítica), Cidade Universitária Zeferino Vaz, s/n, Campinas, São Paulo (SP), CEP 13083-970, Brazil
| |
Collapse
|
4
|
Koljančić N, Gomes AA, Špánik I. A non-target geographical origin screening of botrytized wines through comprehensive two-dimensional gas chromatography coupled with high-resolution mass spectrometry. J Sep Sci 2023; 46:e2300249. [PMID: 37501317 DOI: 10.1002/jssc.202300249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 04/13/2023] [Revised: 07/13/2023] [Accepted: 07/17/2023] [Indexed: 07/29/2023]
Abstract
One of the most effective methods for gaining insight into the composition of trace-level volatile organic characteristics of wine products is through the use of a comprehensive two-dimensional gas chromatography-high resolution mass spectrometry (GC × GC-HRMS) technique. The vast amount of data generated by this method, however, can often be overwhelming requiring exhaustive and time-consuming analysis to identify significant statistical characteristics. The use of advanced chemometric software can achieve the same or even higher efficiency. This study aimed to identify differences based on geographical locations by analyzing the volatile organic compounds in the composition of botrytized wines from Slovakia, Hungary, France, and Austria. The volatile organic compounds were extracted by solid-phase microextraction and analyzed using GC × GC-HRMS. The data obtained from the analysis underwent Fisher-ratio (F-ratio) tile-based analysis to identify statistically significant differences. Principal component analysis demonstrated a significant distinction between wine samples based on geographical location, using only 10 statistically significant features with the highest F-ratio. In the samples, the following compounds were analyzed: methyl-octadecanoate, 2-cyanophenyl-β-phenylpropionate, α-ionone, n-octanoic acid, 1,2-dihydro-1,1,6-trimethyl-naphthalene, methyl-hexadecanoate, ethyl-pentadecanoate, ethyl-decanoate, and γ-nonalactone. These, all play an important role in cluster pattern observed on principal component analysis results. Additionally, hierarchical cluster analysis confirmed this.
Collapse
Affiliation(s)
- Nemanja Koljančić
- Institute of Analytical Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Bratislava, Slovakia
| | - Adriano A Gomes
- Institute of Analytical Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Bratislava, Slovakia
- Instituto de Química, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves, Porto Alegre, Brazil
| | - Ivan Špánik
- Institute of Analytical Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Bratislava, Slovakia
| |
Collapse
|
5
|
Junges CH, Guerra CC, Canedo-Reis NAP, Gomes AA, Ferrão MF. Discrimination of whole grape juice using fluorescence spectroscopy data with linear discriminant analysis coupled to genetic and ant colony optimisation algorithms. Anal Methods 2023; 15:187-195. [PMID: 36514991 DOI: 10.1039/d2ay01636b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
In this study, a new approach was developed for classifying grape juices produced in Brazil using unfolded excitation-emission matrix (EEM) fluorescence spectroscopy and chemometrics, with respect to the agricultural production system, namely the conventional or organic agricultural one. Linear discriminant analysis (LDA) coupled to ant colony optimisation (ACO) and the genetic algorithm (GA) were used to select a more effective subset of variables to discriminate grape juice samples. The best results demonstrated highly efficient classification of grape juice samples according to a conventional or organic production process with an accuracy rate of up to 97% for the models and 94% in the prediction of these classes for samples external to the model. The models showed high selectivity and sensitivity with a rate of up to 100% for the training and test datasets, in addition to determining the most significant variables that explain the separation of classes. The proposed method proves to be viable, as it is fast and requires minimal sample preparation, allowing quality control in the food industry.
Collapse
Affiliation(s)
- Carlos H Junges
- Laboratório de Quimiometria e Instrumentação Analítica (LAQIA), Instituto de Química, Universidade Federal do Rio Grande do Sul (UFRGS), Avenida Bento Gonçalves, 9500, Porto Alegre, Rio Grande do Sul (RS), CEP 91501-970, Brazil.
| | - Celito C Guerra
- Laboratório de Cromatografia e Espectrometria de Massas (LACEM), Unidade Uva e Vinho, Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA), Rua Livramento, 515, Bento Gonçalves, Rio Grande do Sul, Brazil
| | - Natalia A P Canedo-Reis
- Programa de Pós-Graduação em Ciências Farmacêuticas, Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul, Avenida Ipiranga, 2752, Porto Alegre, Rio Grande do Sul, CEP 90610-000, Brazil
| | - Adriano A Gomes
- Laboratório de Quimiometria e Instrumentação Analítica (LAQIA), Instituto de Química, Universidade Federal do Rio Grande do Sul (UFRGS), Avenida Bento Gonçalves, 9500, Porto Alegre, Rio Grande do Sul (RS), CEP 91501-970, Brazil.
| | - Marco F Ferrão
- Laboratório de Quimiometria e Instrumentação Analítica (LAQIA), Instituto de Química, Universidade Federal do Rio Grande do Sul (UFRGS), Avenida Bento Gonçalves, 9500, Porto Alegre, Rio Grande do Sul (RS), CEP 91501-970, Brazil.
- Instituto Nacional de Ciência e Tecnologia-Bioanalítica (INCT-Bioanalítica), Cidade Universitária Zeferino Vaz, s/n, Campinas, São Paulo (SP), CEP 13083-970, Brazil
| |
Collapse
|
6
|
Vyviurska O, Thai HA, Garančovská D, Gomes AA, Špánik I. Enhanced multi-stir bar sorptive extraction for wine analysis: Alteration in headspace mode. Food Res Int 2022; 158:111510. [DOI: 10.1016/j.foodres.2022.111510] [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] [Received: 03/02/2022] [Revised: 05/21/2022] [Accepted: 06/10/2022] [Indexed: 11/04/2022]
|
7
|
Junges CH, Guerra CC, Reis NA, Gomes AA, Diogo FS, Ferrão MF. GRAPE JUICE CLASSIFICATION WITH RESPECT AGRICULTURAL PRODUCTION SYSTEM BY MEANS OF VISIBLE SPECTROSCOPY CHEMOMETRICS ASSISTED. J Food Compost Anal 2022. [DOI: 10.1016/j.jfca.2022.104793] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
8
|
Vyviurska O, Koljančić N, Gomes AA, Špánik I. Optimization of enantiomer separation in flow-modulated comprehensive two-dimensional gas chromatography by response surface methodology coupled to artificial neural networks: Wine analysis case study. J Chromatogr A 2022; 1675:463189. [PMID: 35667220 DOI: 10.1016/j.chroma.2022.463189] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 05/29/2022] [Accepted: 05/31/2022] [Indexed: 11/16/2022]
Abstract
In spite of extensive applications of flow modulated comprehensive two-dimensional gas chromatography (FM-GG × GC) in different research areas, its application in the field of chiral separation is very limited. From a practical point of view, the establishment of experimental parameters for enantiomer separations is possibly more demanding in this case. Since the carrier gas flows in both dimensions, it affects not only the separation parameters, but also the fill/flush volumes of the modulator and its working efficiency. In this context, a multivariate design of experiment was applied to find the optimum experimental parameters of a reversed fill/flush (RFF) modulator for enantiomer separation of organic compounds present in botrytized wine samples. The results were described both with response surface methodology and artificial neural networks (ANN). The enantiomeric composition of chiral compounds present in the botrytized wines was used to identify their geographical origin, by principal component analysis (PCA). In addition, the developed one-class partial least squares (OC-PLS) model enabled recognition of the wine samples from the Tokaj wine region with 93% effectiveness in the presence of other samples.
Collapse
Affiliation(s)
- Olga Vyviurska
- Faculty of Chemical and Food Technology, Institute of Analytical Chemistry, Slovak University of Technology in Bratislava, Bratislava 81237, Slovak Republic
| | - Nemanja Koljančić
- Faculty of Chemical and Food Technology, Institute of Analytical Chemistry, Slovak University of Technology in Bratislava, Bratislava 81237, Slovak Republic
| | - Adriano A Gomes
- Faculty of Chemical and Food Technology, Institute of Analytical Chemistry, Slovak University of Technology in Bratislava, Bratislava 81237, Slovak Republic; Institute of Chemistry, Federal University of Rio Grande do Sul, Bento Gonçalves Avenue, 9500, Porto Alegre, RS 91501-970, Brazil
| | - Ivan Špánik
- Faculty of Chemical and Food Technology, Institute of Analytical Chemistry, Slovak University of Technology in Bratislava, Bratislava 81237, Slovak Republic.
| |
Collapse
|
9
|
Gomes AA, Khvalbota L, Machyňáková A, Furdíková K, Zini CA, Špánik I. Slovak Tokaj wines classification with respect to geographical origin by means of one class approaches. Spectrochim Acta A Mol Biomol Spectrosc 2021; 257:119770. [PMID: 33852999 DOI: 10.1016/j.saa.2021.119770] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 03/21/2021] [Accepted: 03/29/2021] [Indexed: 06/12/2023]
Abstract
Tokaj wines could be produced only in so called Tokaj/Tokay wine region that falls within two countries Slovakia and Hungary. Thus, wines bearing Tokaj appellation must be produced only in Hungary and Slovakia by traditional process. Unfortunately, some counterfeit wines from neighbour region in Ukraine could be found in market. The aim of this work is to explore a simple UV-VIS spectrum to recognise true Tokaj/Tokay wines from counterfeits and try to differentiate wines based on their country of origin. This type of question can be duly answered using one class classification approach. Two different approaches, Data Driven Soft Independent Modelling of Class Analogy - DD-SIMCA and One-Class Partial Least Squares - OC-PLS were tested and evaluated for this purpose. In both cases, rigorous way models were built and optimized using only samples of the target class. A set of external samples containing samples from target class and non-target were used to validate the models ability to recognize Slovak samples and reject non-Slovak samples. Model based on DD-SIMCA showed better performance (97% correct rating) compared to OC-PLS models (80% correct rating). Comparing both approaches in terms of sensitivity and specificity, both exhibit high sensitivity (low false negative rate: DD-SIMCA 95% and OC-PLS 100%), however the OC-PLS based model showed low specificity (40%) while DD-SIMCA showed high specificity (100%) rejecting all samples out of Slovak origin. Therefore, the results found in this study show that it is possible to successfully combine UV-VIS spectra and DD-SIMCA models to discriminate Tokaj wine samples of Slovak origin from others. Equally important is environmentally friendly (fast, simple, absence of solvents) classification method in line with green chemistry.
Collapse
Affiliation(s)
- Adriano A Gomes
- Instituto de Química, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves, 9500, 91501-970 Porto Alegre, RS, Brazil.
| | - Liudmyla Khvalbota
- Institute of Analytical Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, 812 37 Bratislava, Slovakia
| | - Andrea Machyňáková
- Institute of Analytical Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, 812 37 Bratislava, Slovakia
| | - Katarína Furdíková
- Institute of Biotechnology, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, 812 37 Bratislava, Slovakia
| | - Claudia A Zini
- Instituto de Química, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves, 9500, 91501-970 Porto Alegre, RS, Brazil
| | - Ivan Špánik
- Institute of Analytical Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, 812 37 Bratislava, Slovakia.
| |
Collapse
|
10
|
Vyviurska O, Hanobiková M, Gomes AA, Špánik I. Multivariate optimization of dual-sorbent dynamic headspace extraction of volatiles in wine analysis. Food Chem 2021; 365:130449. [PMID: 34218105 DOI: 10.1016/j.foodchem.2021.130449] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 03/10/2021] [Revised: 05/20/2021] [Accepted: 06/21/2021] [Indexed: 10/21/2022]
Abstract
The main critical point of newly developed miniaturized sample preparation techniques is a limited extraction capacity. Dynamic headspace extraction offers increased volume of sorbent which is commonly used in environmental analysis. Application of two sorbents (Carbopack B/Carbopack X and Tenax® TA) at different extraction temperatures allows enhancing a range of volatile organic compounds available for analysis. Such approach was applied in our research for quantification of volatile organic compounds in botrytized wines with gas chromatography. The central composite design was included to analysis simultaneous effects of incubation time, incubation temperature, purge volume and purge flow. In attempt to properly assess results, the data evaluation involved Pareto charts, surface response methodology and principal component analysis. Multivariate experimental design revealed statistical significance of purge volume and quadratic terms of incubation time and temperature, for response of volatiles. The quantification method with 0.2-2.0 µg/L LOD and 0.5-5.0 µg/L LOQ values, was developed under simultaneously optimized experimental conditions such as a 54 °C incubation temperature, a 20.18 min incubation time, a 344.3 mL purge volume and a 16.0 mL/min purge flow. The increased levels of linalool oxide, ethyl phenylacetate, γ-hexalactone and α-terpineol were observed in the samples, that correlated with botrytized wine technology.
Collapse
Affiliation(s)
- Olga Vyviurska
- Slovak University of Technology in Bratislava, Faculty of Chemical and Food Technology, Institute of Analytical Chemistry, 81237 Bratislava, Slovak Republic.
| | - Mária Hanobiková
- Slovak University of Technology in Bratislava, Faculty of Chemical and Food Technology, Institute of Analytical Chemistry, 81237 Bratislava, Slovak Republic
| | - Adriano A Gomes
- Slovak University of Technology in Bratislava, Faculty of Chemical and Food Technology, Institute of Analytical Chemistry, 81237 Bratislava, Slovak Republic; Institute of Chemistry, Federal University of Rio Grande do Sul, Bento Gonçalves Avenue, 9500, 91501-970 Porto Alegre, RS, Brazil
| | - Ivan Špánik
- Slovak University of Technology in Bratislava, Faculty of Chemical and Food Technology, Institute of Analytical Chemistry, 81237 Bratislava, Slovak Republic.
| |
Collapse
|
11
|
Machyňáková A, Schneider MP, Khvalbota L, Vyviurska O, Špánik I, Gomes AA. A fast and inexpensive approach to characterize Slovak Tokaj selection wines using infrared spectroscopy and chemometrics. Food Chem 2021; 357:129715. [PMID: 33878582 DOI: 10.1016/j.foodchem.2021.129715] [Citation(s) in RCA: 4] [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: 02/11/2021] [Revised: 03/11/2021] [Accepted: 03/23/2021] [Indexed: 11/20/2022]
Abstract
The Tokaj Selection wines (hungarian equivalent "Aszú") are typical noble sweet wines produced in Tokaj wine region that falls within two countries, Slovakia and Hungary. Taking into account the economic importance and uniqueness of these wines, in this work, a new, fast and inexpensive method that combines infrared spectroscopy and multivariate models for characterization Slovak Tokaj Selection wines was developed. At first, sample authentication via one class models (dd-SIMCA) considered Slovak Tokaj Selection wines as target class. The non-target sample was considered to be only a Tokaj sample of Slovak origin. The resulting model was able to properly recognize samples of the target class with high sensitivity and specificity. Subsequently, the putňa index was predicted via PLS models. RMSEP equals 0.44; REPpred of 9.6 and R2 0.95 was found in prediction step.
Collapse
Affiliation(s)
- Andrea Machyňáková
- Institute of Analytical Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, 812 37 Bratislava, Slovakia
| | - Mateus P Schneider
- Institute of Chemistry, Federal University of Rio Grande do Sul, Bento Gonçalves Avenue, 9500, 91501-970 Porto Alegre, RS, Brazil
| | - Liudmyla Khvalbota
- Institute of Analytical Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, 812 37 Bratislava, Slovakia
| | - Olga Vyviurska
- Institute of Analytical Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, 812 37 Bratislava, Slovakia
| | - Ivan Špánik
- Institute of Analytical Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, 812 37 Bratislava, Slovakia
| | - Adriano A Gomes
- Institute of Analytical Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, 812 37 Bratislava, Slovakia; Institute of Chemistry, Federal University of Rio Grande do Sul, Bento Gonçalves Avenue, 9500, 91501-970 Porto Alegre, RS, Brazil.
| |
Collapse
|
12
|
Bertoldi C, Lara LZ, Gomes AA, Fernandes AN. Microplastic abundance quantification via a computer-vision-based chemometrics-assisted approach. Microchem J 2021. [DOI: 10.1016/j.microc.2020.105690] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
13
|
Amaral AP, Câmara LT, Nunes LS, Gomes AA. Fatigue and sleepiness in night workers: preliminary results of an educational program. Eur J Public Health 2020. [DOI: 10.1093/eurpub/ckaa166.356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Night work has negative effects on sleep, sleepiness and fatigue with repercussions in performance, safety and health. Therefore, implementing sleep hygiene educational intervention seems of tremendous importance to industries. The questions underlying this study were: 1) To what extent do shift workers experience risk levels of fatigue and sleepiness?; 2) May a sleep hygiene program be associated with improvements on fatigue and sleepiness?
Methods
The study was conducted in industry and employed a pre pos-test design using the Epworth's Sleepiness Scale and Chalder's Fatigue Scale. From 471 night workers assessed 45 participants at risk for fatigue and sleepiness (93.3% males), mean age of 31 years (SD = 7.3), were selected for the intervention, composed of four sessions along five months, delivered by the occupational medical doctor. The first three sessions, in small groups, focused in sleep literacy and sleep hygiene; the last one, individual, focused in clinical issues (personalized intervention plan).
Results
Results suggested that 9.6% (N = 45) of the night workers were at high risk (higher levels of fatigue and sleepiness). After intervention, paired T tests revealed significant decreases (p<.001) on mean values for fatigue from T0 (M = 6.67; SD = 2.23) to T1 (M = 4.78; SD = 3.02), and for sleepiness from T0 (M = 15.49; SD = 4.39) to T1 (M = 11.8; SD = 5.95). Along the intervention, participants pointed out family-related routines as an obstacle to daytime sleeping period.
Conclusions
Results support the importance of this educational program focused on sleep hygiene, in reducing sleepiness and fatigue. The program is now part of the occupational health procedures of the company but qualitative results also suggest the importance of including the family in the program, as an innovative procedure. In summary, education of night workers and their families is needed regarding sleep habits in order to promote safety and health in workplace.
Key messages
The sleep hygiene program implemented in permanent night workers allowed to reduce fatigue and sleepiness. Fatigue and sleepiness management improvements might contribute to reduce the risk of accidents in the workplace and increase the workers’ health condition.
Collapse
Affiliation(s)
- A P Amaral
- Coimbra Health School, Institute Polytechnic of Coimbra, Coimbra, Portugal
| | - L T Câmara
- Coimbra Health School, Institute Polytechnic of Coimbra, Coimbra, Portugal
- Occupational Health Services, Vale S/A, São Luís, Brazil
| | - L S Nunes
- Coimbra Health School, Institute Polytechnic of Coimbra, Coimbra, Portugal
- Institute of Sociology, University of Education, Freiburg, Germany
- Institute of Environmental Health, Faculty of Medicine, Lisbon, Portugal
| | - A A Gomes
- Faculty of Psychology and Educational Sciences, University of Coimbra, Coimbra, Portugal
| |
Collapse
|
14
|
Lima EC, Gomes AA, Tran HN. Comparison of the nonlinear and linear forms of the van't Hoff equation for calculation of adsorption thermodynamic parameters (∆S° and ∆H°). J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113315] [Citation(s) in RCA: 97] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
|
15
|
Porto IS, Santos Neto JH, dos Santos LO, Gomes AA, Ferreira SL. Determination of ascorbic acid in natural fruit juices using digital image colorimetry. Microchem J 2019. [DOI: 10.1016/j.microc.2019.104031] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
|
16
|
Lima DR, Gomes AA, Lima EC, Umpierres CS, Thue PS, Panzenhagen JCP, Dotto GL, El-Chaghaby GA, de Alencar WS. Evaluation of efficiency and selectivity in the sorption process assisted by chemometric approaches: Removal of emerging contaminants from water. Spectrochim Acta A Mol Biomol Spectrosc 2019; 218:366-373. [PMID: 31030003 DOI: 10.1016/j.saa.2019.04.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 03/13/2019] [Accepted: 04/09/2019] [Indexed: 06/09/2023]
Abstract
This paper describes, by the first time, a chemometric approach that combines a simple set of the UV-Vis spectra and partial least square regression (PLSR) for measuring the removal of five pharmaceuticals present in simulated hospital effluents by sorption using activated carbon. The use of multivariate calibration allowed the quantification of the remaining concentrations of the studied drugs present in a complex mixture with high accuracy, avoiding the need for the use of sophisticated methodologies based on chromatography. Isothermal sorption studies were performed on single-component solutions containing amoxicillin, paracetamol, propranolol, sodium diclofenac, or tetracycline as well as on a solution containing a mixture of all these 5 compounds. The isotherm data obtained were fitted to the Langmuir, Freundlich and Liu models. It was observed that for each pharmaceutical, the maximum sorption capacity of the activated carbon was higher for the single component than in the mixture. It was observed that the removal of paracetamol, propranolol, and tetracycline, the removal was complete (100%) and for amoxicillin and sodium diclofenac it was at least 92.71 ± 3.15% and 91.82 ± 0.95% respectively, indicating that the avocado seed activated carbon is an adsorbent with high sorption capacity that can remove five pharmaceuticals from simulated hospital effluents.
Collapse
Affiliation(s)
- Diana R Lima
- Graduate Program in Metallurgical, Mine and Materials Engineering (PPGE3M), School of Engineering, Federal University of Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9500, Porto Alegre, RS, Brazil
| | - Adriano A Gomes
- Institute of Chemistry, Federal University of Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9500, P.O. Box 15003, 91501-970 Porto Alegre, RS, Brazil
| | - Eder C Lima
- Graduate Program in Metallurgical, Mine and Materials Engineering (PPGE3M), School of Engineering, Federal University of Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9500, Porto Alegre, RS, Brazil; Institute of Chemistry, Federal University of Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9500, P.O. Box 15003, 91501-970 Porto Alegre, RS, Brazil; Graduate program in Science of Materials (PGCIMAT), Institute of Chemistry, Federal University of Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9500, Porto Alegre, RS, Brazil.
| | - Cibele S Umpierres
- Graduate program in Science of Materials (PGCIMAT), Institute of Chemistry, Federal University of Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9500, Porto Alegre, RS, Brazil
| | - Pascal S Thue
- Graduate program in Science of Materials (PGCIMAT), Institute of Chemistry, Federal University of Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9500, Porto Alegre, RS, Brazil
| | - José C P Panzenhagen
- Institute of Chemistry, Federal University of Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9500, P.O. Box 15003, 91501-970 Porto Alegre, RS, Brazil
| | - Guilherme L Dotto
- Chemical Engineering Department, Federal University of Santa Maria-UFSM, Santa Maria, RS, Brazil
| | | | - Wagner S de Alencar
- Institute of Exact Sciences, Federal University of South and Southeast of Pará (UNIFESSPA), Marabá, PA, Brazil
| |
Collapse
|
17
|
Ribeiro FC, Oliveira AS, Araújo A, Marinho W, Schneider MP, Pinto L, Gomes AA. Detection oxidative degradation in lubricating oil under storage conditions using digital images and chemometrics. Microchem J 2019. [DOI: 10.1016/j.microc.2019.03.087] [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: 11/25/2022]
|
18
|
Medeiros de Melo JC, da Costa AA, de Castro DG, Gomes AA, Guimaraes AP, Sanches SM, Diniz AC, Ribeiro AR. Abstract P1-19-08: Prognostic factors of human epidermal growth factor 2 (HER2) positive breast cancer patients with brain metastasis in the context of all available new therapies. Cancer Res 2019. [DOI: 10.1158/1538-7445.sabcs18-p1-19-08] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background:
Patients with advanced human epidermal growth factor 2 (HER2)-positive breast cancer are at the highest risk developing breast cancer brain metastases (BCBM), which are associated with significant morbidity and mortality. The advent of HER2-directed therapy resulted in greatly improved survival outcomes and have been widely used. In this context of a better controlled systemic disease, brain metastases are emerging as a new challenge for the oncologist. The aim of this study was to determine the clinicopathologic factors associated with the prognosis of patients with HER2 positive BCBM, in the scenario of new therapies.
Methods:
A retrospective review of clinical data from patients who have developed HER2 positive BCBM from March 2005 to January 2018 at AC Camargo Cancer Center. Patients characteristics were collected, and overall survival (OS) , time to first HER2 positive BCBM and OS after HER2 positive BCBM were estimated by the Kaplan-Meier method. Associations between OS after BCBM and clinical variables were assessed by Cox proportional hazards regression models.
Results
Among 80 patients with HER2-positiveBCBM median age was 51 years (range, 24–81 years). Of the patients, 55 patients (69%) had ER-positive/HER2-positive breast cancer, and 25 (31%) had ERnegative/ HER2-positive breast cancer. The median brain metastasis-free survival period from primary breast cancer was 33.5 months .The median survival after developing brain metastasis was 28 .5 months. Patients with more than 3 brain metastases had significantly shorter overall survival(p=0,01). ). Nineteen patients (24%) underwent surgical treatment of metastasis in the brain and there was no associated with survival duration(p= 0,33). Patients treated with radiotherapy 71 (88%) had significantly better survival (p= 0,013), if the patient received stereotactic radiosurgery (53.5%) compared to total brain radiotherapy received ( 46,5%) was not associated with duration of survival (p= 0,24). . Treatment with other HER2-targeting agents after BCMB had significantly increased survival (p=0,022), including trastuzumab 53 (67%), pertuzumab 21 (26%), trastuzumab emtansine (TDM1 )= 35 (43%) and lapatinib 37 ( 46%). . In multivariate analysis, the presence of more than 3 brain metastases (p=0,005) was the sole independent prognostic factors.
Conclusions:
Our study indicates that HER2-positive patients with more than three brain metastases had a poor prognosis and that regardless of the use of new therapies. The role of new therapies in the management of patients with brain metastases is often not clearly defined. The best treatment strategy is not yet known and the study of prognostic factors may help to choose a better treatment sequence.
Citation Format: Medeiros de Melo JC, da Costa AA, de Castro DG, Gomes AA, Guimaraes AP, Sanches SM, Diniz AC, Ribeiro AR. Prognostic factors of human epidermal growth factor 2 (HER2) positive breast cancer patients with brain metastasis in the context of all available new therapies [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr P1-19-08.
Collapse
Affiliation(s)
| | - AA da Costa
- AC Camargo Cancer Center, São Paulo, SP, Brazil
| | | | - AA Gomes
- AC Camargo Cancer Center, São Paulo, SP, Brazil
| | | | - SM Sanches
- AC Camargo Cancer Center, São Paulo, SP, Brazil
| | - AC Diniz
- AC Camargo Cancer Center, São Paulo, SP, Brazil
| | - AR Ribeiro
- AC Camargo Cancer Center, São Paulo, SP, Brazil
| |
Collapse
|
19
|
Santos Neto JH, Porto ISA, Schneider MP, Dos Santos AMP, Gomes AA, Ferreira SLC. Speciation analysis based on digital image colorimetry: Iron (II/III) in white wine. Talanta 2018; 194:86-89. [PMID: 30609617 DOI: 10.1016/j.talanta.2018.09.102] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [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: 08/13/2018] [Revised: 09/25/2018] [Accepted: 09/27/2018] [Indexed: 11/19/2022]
Abstract
This work proposes an analytical strategy utilizing digital images (DI) for the iron inorganic speciation in white wine. The method was established by the reaction of iron(II) ions with 1,2 ortho-phenanthroline as a chromogenic reagent. Total iron was determined using the same reagent after the addition of hydroxyl ammonium chloride as a reducing agent. In both cases, digital images of the standards/chromogenic reagent and samples were acquired and stored in JPEG format. The region of interest (ROI) was determined with a constant square shape for all images. The ROI was submitted to decomposition in color values according to the RGB additive color model. However, the data obtained by the blue channel was the one used in the construction of the analytical curves because it presented the highest sensitivity. The optimization of the experimental conditions of the procedure was performed by employing multivariate techniques. The precision was evaluated using a wine sample with iron (II) and total iron contents of 0.41 and 0.69 mg L-1, respectively. The results expressed as relative standard deviations were 3.57% for iron (II) and 4.76% for total iron contents. A comparison between the results obtained for total iron by the DI method with the results found using flame atomic absorption spectrometry confirmed the method accuracy. The DI procedure was applied for speciation analysis in six white wine samples and the contents found varied from 0.41 to 1.67 mg L-1 for iron (II) and from 0.69 to 1.71 mg L-1 for total iron. These results are in agreement with those found for speciation analysis of iron in wine samples. Iron (III) contents can be found by the difference between the total iron and iron (II) contents.
Collapse
Affiliation(s)
- Joao H Santos Neto
- Universidade Federal da Bahia, Instituto de Química, Grupo de Pesquisa em Química e Quimiometria, Campus Ondina, 40170-115 Salvador, Bahia, Brazil; Instituto Nacional de Ciência e Tecnologia, INCT, de Energia e Ambiente, Universidade Federal da Bahia, 40170-115 Salvador, Bahia, Brazil
| | - Icaro S A Porto
- Universidade Federal da Bahia, Instituto de Química, Grupo de Pesquisa em Química e Quimiometria, Campus Ondina, 40170-115 Salvador, Bahia, Brazil; Instituto Nacional de Ciência e Tecnologia, INCT, de Energia e Ambiente, Universidade Federal da Bahia, 40170-115 Salvador, Bahia, Brazil
| | - Mateus P Schneider
- Universidade Federal do Rio Grande do Sul, Instituto de Química, 90650-001 Porto Alegre, Rio Grande do Sul, Brazil
| | - Ana M P Dos Santos
- Universidade Federal da Bahia, Instituto de Química, Grupo de Pesquisa em Química e Quimiometria, Campus Ondina, 40170-115 Salvador, Bahia, Brazil; Instituto Nacional de Ciência e Tecnologia, INCT, de Energia e Ambiente, Universidade Federal da Bahia, 40170-115 Salvador, Bahia, Brazil
| | - Adriano A Gomes
- Universidade Federal do Rio Grande do Sul, Instituto de Química, 90650-001 Porto Alegre, Rio Grande do Sul, Brazil.
| | - Sergio L C Ferreira
- Universidade Federal da Bahia, Instituto de Química, Grupo de Pesquisa em Química e Quimiometria, Campus Ondina, 40170-115 Salvador, Bahia, Brazil; Instituto Nacional de Ciência e Tecnologia, INCT, de Energia e Ambiente, Universidade Federal da Bahia, 40170-115 Salvador, Bahia, Brazil.
| |
Collapse
|
20
|
Moreira EDT, Pinto L, Gomes AA, Goicoechea HC, Araújo MCU. A Fast Chromatographic Method for Determination of Daidzein and Genistein in Spiked Water River Samples Using Multivariate Curve Resolution. J BRAZIL CHEM SOC 2015. [DOI: 10.5935/0103-5053.20150125] [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: 11/20/2022] Open
|
21
|
Sacco ICN, Hamamoto AN, Onodera AN, Gomes AA, Weiderpass HA, Pachi CGF, Yamamoto JF, von Tscharner V. Motor strategy patterns study of diabetic neuropathic individuals while walking. A wavelet approach. J Biomech 2014; 47:2475-82. [PMID: 24816334 DOI: 10.1016/j.jbiomech.2014.04.007] [Citation(s) in RCA: 13] [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: 08/18/2013] [Revised: 04/02/2014] [Accepted: 04/03/2014] [Indexed: 11/29/2022]
Abstract
The aim of this study was to investigate muscle׳s energy patterns and spectral properties of diabetic neuropathic individuals during gait cycle using wavelet approach. Twenty-one diabetic patients diagnosed with peripheral neuropathy, and 21 non-diabetic individuals were assessed during the whole gait cycle. Activation patterns of vastus lateralis, medial gastrocnemius and tibialis anterior were studied by means of bipolar surface EMG. The signal׳s energy and frequency were compared between groups using t-test. The energy was compared in each frequency band (7-542 Hz) using ANOVAs for repeated measures for each group and each muscle. The diabetic individuals displayed lower energies in lower frequency bands for all muscles and higher energies in higher frequency bands for the extensors׳ muscles. They also showed lower total energy of gastrocnemius and a higher total energy of vastus, considering the whole gait cycle. The overall results suggest a change in the neuromuscular strategy of the main extensor muscles of the lower limb of diabetic patients to compensate the ankle extensor deficit to propel the body forward and accomplish the walking task.
Collapse
Affiliation(s)
- I C N Sacco
- University of São Paulo, School of Medicine, Physical Therapy, Speech and Occupational Therapy Department, Brazil.
| | - A N Hamamoto
- University of São Paulo, School of Medicine, Physical Therapy, Speech and Occupational Therapy Department, Brazil
| | - A N Onodera
- University of São Paulo, School of Medicine, Physical Therapy, Speech and Occupational Therapy Department, Brazil
| | - A A Gomes
- Federal University of Amazonas, School of Physical Education and Physiotherapy, Brazil
| | | | - C G F Pachi
- University of São Paulo, School of Medicine, Medical Informatics Department, Brazil
| | - J F Yamamoto
- University of São Paulo, Hospital das Clínicas, Brazil
| | - V von Tscharner
- Human Performance Laboratory, Faculty of Kinesiology, The University of Calgary, Calgary, Alberta, Canada
| |
Collapse
|
22
|
Santos MBH, Gomes AA, Vilar WTS, Almeida PBA, Milani M, Nóbrega MBM, Medeiros EP, Galvão RKH, Araújo MCU. Non-Destructive NIR Spectrometric Cultivar Discrimination of Castor Seeds Resulting from Breeding Programs. J BRAZIL CHEM SOC 2014. [DOI: 10.5935/0103-5053.20140068] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
23
|
Gomes AA, Silva-Júnior ACT, Oliveira EB, Asad LMBO, Reis NCSC, Felzenszwalb I, Kovary K, Asad NR. Reactive oxygen species mediate lethality induced by far-UV inEscherichia colicells. Redox Rep 2013; 10:91-5. [PMID: 15949129 DOI: 10.1179/135100005x38833] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
The involvement of reactive oxygen species (ROS) in the induction of DNA damage to Escherichia coli cells caused by UVC (254 nm) irradiation was studied. We verified the expression of the soxS gene induced by UVC (254 nm) and its inhibition by sodium azide, a singlet oxygen (1O2) scavenger. Additional results showed that a water-soluble carotenoid (norbixin) protects against the lethal effects of UVC. These results suggest that UVC radiation can also cause ROS-mediated lethality.
Collapse
Affiliation(s)
- A A Gomes
- Departamento de Biofísica e Biometria, Instituto de Biologia Roberto Alcantara Gomes, Universidade do Estado do Rio de Janeiro, 20551-030 Rio de Janeiro, RJ, Brazil
| | | | | | | | | | | | | | | |
Collapse
|
24
|
Fernandes DDS, Gomes AA, Fontes MMD, Costa GBD, Almeida VED, Araújo MCUD, Galvão RKH, Véras G. UV-Vis Spectrometric Detection of Biodiesel/Diesel Blend Adulterations with Soybean Oil. J BRAZIL CHEM SOC 2013. [DOI: 10.5935/0103-5053.20130259] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
25
|
|
26
|
Gomes AA, Braga SP, Cruz AG, Cadena RS, Lollo PCB, Carvalho C, Amaya-Farfán J, Faria JAF, Bolini HMA. Effect of the inoculation level of Lactobacillus acidophilus in probiotic cheese on the physicochemical features and sensory performance compared with commercial cheeses. J Dairy Sci 2012; 94:4777-86. [PMID: 21943729 DOI: 10.3168/jds.2011-4175] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2011] [Accepted: 05/27/2011] [Indexed: 11/19/2022]
Abstract
The complex metabolism of probiotic bacteria requires several technological options to guarantee the functionally of probiotic dairy foods during the shelf life. This research aimed to evaluate the effect of the supplementation of increasing amounts of Lactobacillus acidophilus (0, 0.4, or 0.8 g/L of milk) on the physicochemical parameters and sensory acceptance of Minas fresh cheese. In addition, the sensory acceptance of probiotic cheeses was assessed using a consumer test and compared with commercial cheeses (conventional and probiotic). High counts (9.11 to 9.42 log cfu/g) of L. acidophilus were observed throughout the shelf life, which contributed to the maintenance of its probiotic status and resulted in lower pH values and greater production of organic acids. The probiotic cheeses presented lower scores for appearance, aroma, and texture compared with conventional cheeses. Internal preference mapping explained almost 60% of the total variation of the data and showed a large number of consumers concentrated near the conventional cheeses, demonstrating greater preference for these samples. The findings indicated that some negative sensory effects could occur when high level of supplementation with L. acidophilus is used in probiotic cheese processing.
Collapse
Affiliation(s)
- A A Gomes
- Faculdade Tecnologia Termomecânica, Curso de Tecnologia de Alimentos, 09611-900 São Bernardo do Campo, São Paulo, Brazil
| | | | | | | | | | | | | | | | | |
Collapse
|
27
|
Ghasemi-Varnamkhasti M, Mohtasebi SS, Rodriguez-Mendez ML, Gomes AA, Araújo MCU, Galvão RK. Screening analysis of beer ageing using near infrared spectroscopy and the Successive Projections Algorithm for variable selection. Talanta 2012; 89:286-91. [DOI: 10.1016/j.talanta.2011.12.030] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2011] [Revised: 11/30/2011] [Accepted: 12/06/2011] [Indexed: 10/14/2022]
|
28
|
Fernandes DDS, Gomes AA, Costa GBD, Silva GWBD, Véras G. Determination of biodiesel content in biodiesel/diesel blends using NIR and visible spectroscopy with variable selection. Talanta 2011; 87:30-4. [DOI: 10.1016/j.talanta.2011.09.025] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2011] [Revised: 09/14/2011] [Accepted: 09/14/2011] [Indexed: 11/17/2022]
|
29
|
Oliveira ACN, Neves Silva JP, Coutinho PJG, Gomes AA, Coutinho OP, Real Oliveira MECD. Monoolein as helper lipid for non-viral transfection in mammals. J Control Release 2010; 148:e91-2. [PMID: 21529654 DOI: 10.1016/j.jconrel.2010.07.067] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- A C N Oliveira
- Center of Molecular & Environmental Biology, University of Minho, Campus of Gualtar, 4710-057 Braga, Portugal
| | | | | | | | | | | |
Collapse
|
30
|
Sacco ICN, Hamamoto AN, Gomes AA, Onodera AN, Hirata RP, Hennig EM. Role of ankle mobility in foot rollover during gait in individuals with diabetic neuropathy. Clin Biomech (Bristol, Avon) 2009; 24:687-92. [PMID: 19497649 DOI: 10.1016/j.clinbiomech.2009.05.003] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/27/2008] [Revised: 03/23/2009] [Accepted: 05/07/2009] [Indexed: 02/07/2023]
Abstract
BACKGROUND The purpose of this study was to investigate the ankle range of motion during neuropathic gait and its influence on plantar pressure distribution in two phases during stance: at heel-strike and at push-off. METHODS Thirty-one adults participated in this study (control group, n=16; diabetic neuropathic group, n=15). Dynamic ankle range of motion (electrogoniometer) and plantar pressures (PEDAR-X system) were acquired synchronously during walking. Plantar pressures were evaluated at rearfoot, midfoot and forefoot during the two phases of stance. General linear model repeated measures analysis of variance was applied to investigate relationships between groups, areas and stance phases. FINDINGS Diabetic neuropathy patients walked using a smaller ankle range of motion in stance phase and smaller ankle flexion at heel-strike (P=0.0005). Peak pressure and pressure-time integral values were higher in the diabetic group in the midfoot at push-off phase when compared to heel-strike phase. On the other hand, the control group showed similar values of peak pressure in midfoot during both stance phases. INTERPRETATION The ankle mobility reduction observed could be associated to altered plantar pressure distribution observed in neuropathic subjects. Results demonstrated that midfoot and forefoot play a different role in subjects with neuropathy by receiving higher loads at push-off phase that are probably due to smaller ankle flexion at stance phase. This may explain the higher loads in anterior areas of the foot observed in diabetic neuropathy subjects and confirm an inadequate foot rollover associated to the smaller ankle range of motion at the heel-strike phase.
Collapse
Affiliation(s)
- I C N Sacco
- Laboratory of Biomechanics of Human Movement and Posture, Physical Therapy, Speech and Occupational Therapy Department, School of Medicine, University of Sao Paulo, Brazil.
| | | | | | | | | | | |
Collapse
|
31
|
Gomes AA, Asad LMBO, Felzenszwalb I, Leitão AC, Silva AB, Guillobel HCR, Asad NR. Does UVB radiation induce SoxS gene expression in Escherichia coli cells? Radiat Environ Biophys 2004; 43:219-222. [PMID: 15372272 DOI: 10.1007/s00411-004-0253-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2004] [Accepted: 07/22/2004] [Indexed: 05/24/2023]
Abstract
The SoxRS regulon is induced when bacterial cells are exposed to redox-cycling agents such as menadione or paraquat. In this paper it is shown that a physical agent, such as ultraviolet radiation with a wavelength of 312 nm (UVB) can induce soxS gene expression. The results indicate that this induction involves the RpoS protein. Moreover, an unexpected increase of soxS gene expression independent of a functional soxR gene in UVB-irradiated cells has been verified. This increase could be explained by transcription of soxS gene in a rpoS-dependent pathway.
Collapse
Affiliation(s)
- A A Gomes
- Departamento de Biofísica e Biometria, Instituto de Biologia Roberto Alcantara Gomes, Universidade do Estado do Rio de Janeiro, 20551-030 Rio de Janeiro, RJ, Brazil
| | | | | | | | | | | | | |
Collapse
|
32
|
Gomes AA, Guimaraes AP. Magnetic properties and electronic structure of rare earth-transition metal intermetallic compounds. ACTA ACUST UNITED AC 2001. [DOI: 10.1088/0305-4608/4/9/017] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
33
|
|
34
|
Ferreira MM, Ferreira CM, Gomes AA. [Oncology day-hospital: what is the reality?]. Servir 1999; 47:117-21. [PMID: 12035149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Affiliation(s)
- M M Ferreira
- Serviço de Doenças Infecciosas, Hospital de S. João
| | | | | |
Collapse
|
35
|
Albas A, Pardo PE, Gomes AA, Bernardi F, Ito FH. Effect of a booster-dose of rabies vaccine on the duration of virus neutralizing antibody titers in bovines. Rev Soc Bras Med Trop 1998; 31:367-71. [PMID: 9662964 DOI: 10.1590/s0037-86821998000400006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Humoral immune response using inactivated rabies vaccine was studied in 35 nelore cross-bred bovines of western region of São Paulo state. Ninety days after vaccination, 13 (92.8%) animals presented titers > or = 0.5 IU/ml, through mouse neutralization test. After 180 days, 9 (64.3%) sera showed titers > or = 0.5 IU/ml, after 270 days, only one (7.1%) showed a titer of 0.51 IU/ml, and after 360 days, all animals showed titers < 0.5 IU/ml. Group of animals receiving booster dose 30 days after vaccination presented, two months after, all with titers > 0.5 IU/ml. At 180 days, 17 (80.9%) sera presented titers > 0.5 IU/ml; at 270 days, 15 (71.4%), with titers > or = 0.5 IU/ml and at 360 days, 4 (19.0%), with titers > or = 0.5 IU/ml. Booster-dose ensured high levels of neutralizing antibodies for at least three months, and 240 days after revaccination, 71.4% of animals were found with titers > or = 0.5 IU/ml.
Collapse
Affiliation(s)
- A Albas
- Instituto Biológico, Faculdade de Ciências Agrárias, Universidade do Oeste Paulista, SP, Brasil
| | | | | | | | | |
Collapse
|
36
|
Gomes AA, Troper A. Transition-metal impurities in Fe: Magnetic- and hyperfine-field properties. Phys Rev B Condens Matter 1995; 52:9137-9139. [PMID: 9979943 DOI: 10.1103/physrevb.52.9137] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
37
|
|
38
|
Gomes AA, Melo JC. [The terminal patient and psychotherapeutic approach]. ACTA MEDICA PORT 1991; 4:61-3. [PMID: 1867117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The end stage situation, namely AIDS and malignant diseases, patients are analysed by the authors from the psychiatric and psychologic standpoint. A multidisciplinary clinical approach is pointed out and psychotherapeutic attitude and action parameters are referred to achieve both the understanding of persons in those situations, and the correct clinical praxis towards them.
Collapse
Affiliation(s)
- A A Gomes
- Departamento de Saúde Mental da D.G.S.P. Ministério da Justiça, Lisboa
| | | |
Collapse
|
39
|
Gomes AA, Vieira LF, Pegoraro LF, Salvador MC, Netto JC, Gomes AM. [Comparative analysis of some mechanical properties of solder joints with a copper-aluminum alloy, using two types of low-fusing solder]. Rev Odontol Univ Sao Paulo 1987; 1:3-9. [PMID: 2907388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
|
40
|
Troper A, Gomes AA. Actinide-3d-metal Laves-phase intermetallic compounds: Magnetism and electronic properties. Phys Rev B Condens Matter 1986; 34:6487-6492. [PMID: 9940530 DOI: 10.1103/physrevb.34.6487] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|