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Margalho LP, Graça JS, Kamimura BA, Lee SHI, Canales HDS, Chincha AIA, Caturla MYR, Brexó RP, Crucello A, Alvarenga VO, Cruz AG, Oliveira CAF, Sant'Ana AS. Enterotoxigenic Staphylococcus aureus in Brazilian artisanal cheeses: Occurrence, counts, phenotypic and genotypic profiles. Food Microbiol 2024; 121:104531. [PMID: 38637091 DOI: 10.1016/j.fm.2024.104531] [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: 10/13/2023] [Revised: 03/24/2024] [Accepted: 04/02/2024] [Indexed: 04/20/2024]
Abstract
The present study aimed to assess the occurrence and counts of Staphylococcus aureus in Brazilian artisanal cheeses (BAC) produced in five regions of Brazil: Coalho and Manteiga (Northeast region); Colonial and Serrano (South); Caipira (Central-West); Marajó (North); and Minas Artisanal cheeses, from Araxá, Campos das Vertentes, Cerrado, Serro and Canastra microregions (Southeast). The resistance to chlorine-based sanitizers, ability to attach to stainless steel surfaces, and antibiogram profile of a large set of S. aureus strains (n = 585) were assessed. Further, a total of 42 isolates were evaluated for the presence of enterotoxigenic genes (sea, seb, sec, sed, see, seg, sei, sej, and ser) and submitted to typing using pulsed-field gel electrophoresis (PFGE). BAC presented high counts of S. aureus (3.4-6.4 log CFU/g), varying from 25 to 62.5%. From the S. aureus strains (n = 585) assessed, 16% could resist 200 ppm of sodium hypochlorite, whereas 87.6% produced strong ability to attach to stainless steel surfaces, corroborating with S. aureus ability to persist and spread in the environment. Furthermore, the relatively high frequency (80.5%) of multidrug-resistant S. aureus and the presence of enterotoxin genes in 92.6% of the strains is of utmost attention. It reveals the lurking threat of SFP that can survive when conditions are favorable. The presence of enterotoxigenic and antimicrobial-resistant strains of S. aureus in cheese constitutes a potential risk to public health. This result calls for better control of cheese contamination sources, and taking hygienic measures is necessary for food safety. More attention should be paid to animal welfare and hygiene practices in some dairy farms during manufacturing to enhance the microbiological quality of traditional cheese products.
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Affiliation(s)
- Larissa P Margalho
- Department of Food Science and Nutrition, Faculty of Food Engineering, University of Campinas, Campinas, SP, Brazil
| | - Juliana S Graça
- Department of Food Science and Nutrition, Faculty of Food Engineering, University of Campinas, Campinas, SP, Brazil
| | - Bruna A Kamimura
- Department of Food Science and Nutrition, Faculty of Food Engineering, University of Campinas, Campinas, SP, Brazil
| | - Sarah H I Lee
- Department of Food Engineering, School of Animal Science and Food Engineering, University of São Paulo, Pirassununga, SP, Brazil
| | - Héctor D S Canales
- Department of Food Science and Nutrition, Faculty of Food Engineering, University of Campinas, Campinas, SP, Brazil
| | - Alexandra I A Chincha
- Department of Food Science and Nutrition, Faculty of Food Engineering, University of Campinas, Campinas, SP, Brazil
| | - Magdevis Y R Caturla
- Department of Food Science and Nutrition, Faculty of Food Engineering, University of Campinas, Campinas, SP, Brazil
| | - Ramon P Brexó
- Department of Food Science and Nutrition, Faculty of Food Engineering, University of Campinas, Campinas, SP, Brazil
| | - Aline Crucello
- Department of Food Science and Nutrition, Faculty of Food Engineering, University of Campinas, Campinas, SP, Brazil
| | - Verônica O Alvarenga
- Department of Food Science and Nutrition, Faculty of Food Engineering, University of Campinas, Campinas, SP, Brazil; Department of Food, Faculty of Pharmacy, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Adriano G Cruz
- Department of Food, Instituto Federal de Educação, Ciência e Tecnologia do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Carlos Augusto F Oliveira
- Department of Food Engineering, School of Animal Science and Food Engineering, University of São Paulo, Pirassununga, SP, Brazil
| | - Anderson S Sant'Ana
- Department of Food Science and Nutrition, Faculty of Food Engineering, University of Campinas, Campinas, SP, Brazil.
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Furtado MM, Silva BS, Freire L, Graça JS, Alvarenga VO, Hungaro HM, Sant'Ana AS. Investigating desiccation resistance, post-rehydration growth, and heat tolerance in desiccation-injured cells of Salmonella enterica isolated from the soybean production chain. Int J Food Microbiol 2023; 405:110387. [PMID: 37672943 DOI: 10.1016/j.ijfoodmicro.2023.110387] [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: 04/23/2023] [Revised: 08/28/2023] [Accepted: 08/31/2023] [Indexed: 09/08/2023]
Abstract
This study compared the resistance to different desiccation conditions of 190 Salmonella enterica strains previously isolated from the soybean meal production chain and belonging to 23 serovars. Additionally, the post-rehydration growth and heat tolerance of the strains previously exposed to desiccation were determined. Variability in desiccation resistance was observed both within and between serovars. Strains belonging to S. Havana and S. Schwarzengrund serovars were the most resistant, regardless of storage condition. The drying temperature (20 °C and 30 °C) did not influence the desiccation resistance of the Salmonella strains. On the other hand, increasing drying time from 1 to 7 days reduced Salmonella counts. The origin (isolation sources) also influenced the desiccation resistance of the Salmonella strains. The growth of the Salmonella strains after rehydration varied considerably depending on the drying conditions and incubation temperature during cultivation. An increase in the time and temperature of drying led to a reduction in population of most Salmonella strains after rehydration. Salmonella strains previously desiccated also showed differences in the heat tolerance in all temperature-time binomials tested. Some strains were highly resistant to heat tolerance conditions, presenting <1 log CFU/mL reduction from the initial population. The results obtained in this study suggest that the strategies to mitigate Salmonella in low-aw foods must consider the existence of high-stress resistant strains and their multiple-stress adaptability profiles, including effects of processing, food composition, and storage conditions.
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Affiliation(s)
- Marianna M Furtado
- Department of Food Science and Nutrition, Faculty of Food Engineering, University of Campinas, Campinas, SP, Brazil
| | - Beatriz S Silva
- Department of Food Science and Nutrition, Faculty of Food Engineering, University of Campinas, Campinas, SP, Brazil
| | - Luísa Freire
- Department of Food Science and Nutrition, Faculty of Food Engineering, University of Campinas, Campinas, SP, Brazil
| | - Juliana S Graça
- Department of Food Science and Nutrition, Faculty of Food Engineering, University of Campinas, Campinas, SP, Brazil
| | - Verônica O Alvarenga
- Department of Food Science and Nutrition, Faculty of Food Engineering, University of Campinas, Campinas, SP, Brazil; Department of Food, Faculty of Pharmacy, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Humberto M Hungaro
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Federal University of Juiz de Fora, Juiz de Fora, MG, Brazil
| | - Anderson S Sant'Ana
- Department of Food Science and Nutrition, Faculty of Food Engineering, University of Campinas, Campinas, SP, Brazil.
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3
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Balthazar CF, Guimarães JT, Rocha RS, Pimentel TC, Neto RP, Tavares MIB, Graça JS, Alves Filho EG, Freitas MQ, Esmerino EA, Granato D, Rodrigues S, Raices RS, Silva MC, Sant’Ana AS, Cruz AG. Nuclear magnetic resonance as an analytical tool for monitoring the quality and authenticity of dairy foods. Trends Food Sci Technol 2021. [DOI: 10.1016/j.tifs.2020.12.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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4
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Almada CN, Almada-Érix CN, Costa WKA, Graça JS, Cabral L, Noronha MF, Gonçalves AESS, Santos AD, Lollo PC, Magnani M, Sant'Ana AS. Wheat-durum pasta added of inactivated Bifidobacterium animalis decreases glucose and total cholesterol levels and modulates gut microbiota in healthy rats. Int J Food Sci Nutr 2021; 72:781-793. [PMID: 33487082 DOI: 10.1080/09637486.2021.1877261] [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] [Indexed: 12/27/2022]
Abstract
This study investigated the effects of consumption of wheat-durum pasta added of Bifidobacterium animalis inactivated by gamma-irradiation (paraprobiotic) on health and gut microbiota of rats. Twenty-one male rats were divided into three groups as follow: control (Control) receiving standard diet; pasta control (PC) receiving diet containing pasta, and paraprobiotic pasta Bifidobacterium-irradiated (PPBI), receiving paraprobiotic pasta. The serum levels of glucose and total cholesterol were reduced (p < 0.05) in PPBI when compared to the Control (p < 0.05). PPBI showed high abundance (p ˂ 0.05) of Firmicutes and Actinobacteria and a lower abundance of Bacteriodes compared to Control and PC. Besides, the PPBI showed high abundance (p ˂ 0.05) of Clostridiales, Lactobacillales; Bifidobacteriales, Bacillales, and Coriobacteriales in comparison to Control. Specific genera such as Bifibacterium, Lactobacillus, Ruminococcus, Allobaculum, and Blautia were more related to PPBI. Findings reveal wheat-durum pasta as a potential vehicle for delivering paraprobiotics B. animalis.
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Affiliation(s)
- Caroline N Almada
- Department of Food Science and Nutrition, Faculty of Food Engineering, University of Campinas, Campinas, Brazil
| | - Carine N Almada-Érix
- Department of Food Science and Nutrition, Faculty of Food Engineering, University of Campinas, Campinas, Brazil
| | - Whyara K A Costa
- Department of Food Engineering, Federal University of Paraíba, João Pessoa, Brazil
| | - Juliana S Graça
- Department of Food Science and Nutrition, Faculty of Food Engineering, University of Campinas, Campinas, Brazil
| | - Lucélia Cabral
- Institute of Biosciences, Department of General and Applied Biology, Sa˜o Paulo State University, Rio Claro, Brazil
| | - Melline F Noronha
- Research Informatics Core, Research Resource Center, University of Illinois at Chicago, Chicago, IL, USA
| | - Any Elisa S S Gonçalves
- Internal Medicine Department, Faculty of Medical Sciences, University of Campinas, Campinas, Brazil
| | - Andrey Dos Santos
- Internal Medicine Department, Faculty of Medical Sciences, University of Campinas, Campinas, Brazil
| | - Pablo C Lollo
- Department of Food Science and Nutrition, Faculty of Food Engineering, University of Campinas, Campinas, Brazil.,Department of Physical Education, Federal University of Great Dourados, Dourados, Brazil
| | - Marciane Magnani
- Department of Food Engineering, Federal University of Paraíba, João Pessoa, Brazil
| | - Anderson S Sant'Ana
- Department of Food Science and Nutrition, Faculty of Food Engineering, University of Campinas, Campinas, Brazil
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Rocha RS, Silva R, Guimarães JT, Balhtazar CF, Silveira MR, Martins AA, Rojas VP, Graça JS, Pimentel TC, Esmerino EA, Sant'Ana AS, Granato D, Freitas MQ, Barros ME, Silva MC, Cruz AG. Ohmic heating does not influence the biochemical properties of Minas Frescal cheese but decreases uric acid levels in healthy Wistar rats. J Dairy Sci 2020; 103:4929-4934. [DOI: 10.3168/jds.2019-17712] [Citation(s) in RCA: 8] [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] [Received: 10/06/2019] [Accepted: 02/03/2020] [Indexed: 02/05/2023]
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6
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Guimarães JT, Balthazar CF, Silva R, Rocha RS, Graça JS, Esmerino EA, Silva MC, Sant’Ana AS, Duarte MCKH, Freitas MQ, Cruz AG. Impact of probiotics and prebiotics on food texture. Curr Opin Food Sci 2020. [DOI: 10.1016/j.cofs.2019.12.002] [Citation(s) in RCA: 76] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Vasconcelos FM, Silva HLA, Poso SMV, Barroso MV, Lanzetti M, Rocha RS, Graça JS, Esmerino EA, Freitas MQ, Silva MC, Raices RSL, Granato D, Pimentel TC, Sant'Ana AS, Cruz AG, Valença SS. Probiotic Prato cheese attenuates cigarette smoke-induced injuries in mice. Food Res Int 2019; 123:697-703. [PMID: 31285019 DOI: 10.1016/j.foodres.2019.06.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [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: 04/21/2019] [Revised: 06/02/2019] [Accepted: 06/03/2019] [Indexed: 01/06/2023]
Abstract
The efficacy of probiotic Prato cheese against the inflammatory and oxidative damage in mice organs induced by cigarette smoke exposure was investigated. Forty C57BL/6 male mice were assigned to four groups: (CS) exposed to cigarette smoke and fed regular chow; (CS + C) exposed to cigarette smoke and fed daily conventional cheese ad libitum; (CS + PC) exposed to cigarette smoke and fed daily probiotic (Lactobacillus casei-01) cheese ad libitum; and a control group (C) exposed to ambient smoke-free air and fed regular chow. Bronchoalveolar lavage (BAL), blood, gut and liver homogenates were used for biochemical assays. The (CS + PC) group exhibited fewer BAL leukocytes, reactive oxygen species (ROS), and BAL and gut lipid peroxidation than the (CS) and (CS + C) groups, which had findings similar to the (C) group. Probiotic cheese consumption did not change the red blood cell count, but lower lactate dehydrogenase (LDH) levels in plasma, inducible nitric oxide synthase (iNOS) and peroxynitrite expression were observed compared to the (CS) and (CS + C) groups, with findings similar to the (C) group. These results suggest that probiotic Prato cheese consumption reduced oxidative stress in the lungs, gut, and liver.
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Affiliation(s)
- Felipe M Vasconcelos
- Universidade Federal do Rio de Janeiro (UFRJ), Instituto de Ciências Biomédicas, Rio de Janeiro, Brazil
| | - Hugo L A Silva
- Universidade Federal Fluminense (UFF), Faculdade de Veterinária, 24230-340 Niterói, Brazil
| | - Sara M V Poso
- Universidade Federal do Rio de Janeiro (UFRJ), Instituto de Ciências Biomédicas, Rio de Janeiro, Brazil
| | - Marina V Barroso
- Universidade Federal do Rio de Janeiro (UFRJ), Instituto de Ciências Biomédicas, Rio de Janeiro, Brazil
| | - Manuella Lanzetti
- Universidade Federal do Rio de Janeiro (UFRJ), Instituto de Ciências Biomédicas, Rio de Janeiro, Brazil
| | - Ramon S Rocha
- Universidade Federal Fluminense (UFF), Faculdade de Veterinária, 24230-340 Niterói, Brazil; Instituto Federal de Educação, Ciência e Tecnologia do Rio de Janeiro (IFRJ), Departamento de Alimentos, 20270-021 Rio de Janeiro, Brazil
| | - Juliana S Graça
- Department of Food Science, Faculty of Food Engineering, University of Campinas, Campinas, SP, Brazil
| | - Erick A Esmerino
- Universidade Federal Fluminense (UFF), Faculdade de Veterinária, 24230-340 Niterói, Brazil
| | - Monica Q Freitas
- Universidade Federal Fluminense (UFF), Faculdade de Veterinária, 24230-340 Niterói, Brazil
| | - Marcia C Silva
- Instituto Federal de Educação, Ciência e Tecnologia do Rio de Janeiro (IFRJ), Departamento de Alimentos, 20270-021 Rio de Janeiro, Brazil
| | - Renata S L Raices
- Instituto Federal de Educação, Ciência e Tecnologia do Rio de Janeiro (IFRJ), Departamento de Alimentos, 20270-021 Rio de Janeiro, Brazil
| | - Daniel Granato
- Universidade Estadual de Ponta Grossa (UEPG), Departamento de Engenharia de Alimentos, 84030-900 Ponta Grossa, Brazil
| | | | - Anderson S Sant'Ana
- Department of Food Science, Faculty of Food Engineering, University of Campinas, Campinas, SP, Brazil
| | - Adriano G Cruz
- Instituto Federal de Educação, Ciência e Tecnologia do Rio de Janeiro (IFRJ), Departamento de Alimentos, 20270-021 Rio de Janeiro, Brazil.
| | - Samuel S Valença
- Universidade Federal do Rio de Janeiro (UFRJ), Instituto de Ciências Biomédicas, Rio de Janeiro, Brazil.
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Ranadheera CS, Evans CA, Baines SK, Balthazar CF, Cruz AG, Esmerino EA, Freitas MQ, Pimentel TC, Wittwer AE, Naumovski N, Graça JS, Sant'Ana AS, Ajlouni S, Vasiljevic T. Probiotics in Goat Milk Products: Delivery Capacity and Ability to Improve Sensory Attributes. Compr Rev Food Sci Food Saf 2019; 18:867-882. [PMID: 33337004 DOI: 10.1111/1541-4337.12447] [Citation(s) in RCA: 83] [Impact Index Per Article: 16.6] [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: 10/30/2018] [Revised: 03/08/2019] [Accepted: 03/19/2019] [Indexed: 01/10/2023]
Abstract
Dairy foods, particularly those of bovine origin, are the predominant vehicles for delivery of probiotic bacteria. Caprine (goat) milk also possesses potential for successful delivery of probiotics, and despite its less appealing flavor in some products, the use of goat milk as a probiotic carrier has rapidly increased over the last decade. This review reports on the diversity, applicability, and potential of using probiotics to enhance the sensory properties of goat milk and goat milk-based products. A brief conceptual introduction to probiotic microorganisms is followed by an account of the unique physicochemical, nutritive, and beneficial aspects of goat milk, emphasizing its advantages as a probiotic carrier. The sensory properties of probiotic-enriched goat milk products are also discussed. The maintenance of probiotic viability and desirable physicochemical characteristics in goat milk products over shelf life is possible. However, the unpleasant sensory features of some goat milk products remain a major disadvantage that hinder its wider utilization. Nevertheless, certain measures such as fortification with selected probiotic strains, inclusion of fruit pulps and popular flavor compounds, and production of commonly consumed tailor-made goat milk-based products have potential to overcome this limitation. In particular, certain probiotic bacteria release volatile compounds as a result of their metabolism, which are known to play a major role in the aroma profile and sensory aspects of the final products.
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Affiliation(s)
- C S Ranadheera
- School of Agriculture & Food, Faculty of Veterinary & Agricultural Sciences, The Univ. of Melbourne, Melbourne, VIC, 3010, Australia
| | - C A Evans
- School of Environmental and Life Sciences, Univ. of Newcastle, NSW, 2308, Australia
| | - S K Baines
- School of Health Sciences, Univ. of Newcastle, NSW, 2308, Australia
| | - Celso F Balthazar
- Dept. of Food Science and Technology, School of Veterinary, Federal Fluminense Univ., 24230-340, Niterói, RJ, Brazil
| | - Adriano G Cruz
- Dept. of Food, Federal Inst. of Rio de Janeiro, 20270-021, Rio de Janeiro, RJ, Brazil
| | - Erick A Esmerino
- Dept. of Food Science and Technology, School of Veterinary, Federal Fluminense Univ., 24230-340, Niterói, RJ, Brazil
| | - Mônica Q Freitas
- Dept. of Food Science and Technology, School of Veterinary, Federal Fluminense Univ., 24230-340, Niterói, RJ, Brazil
| | | | - A E Wittwer
- School of Agriculture & Food, Faculty of Veterinary & Agricultural Sciences, The Univ. of Melbourne, Melbourne, VIC, 3010, Australia
| | - N Naumovski
- Discipline of Nutrition and Dietetics, Faculty of Health, Univ. of Canberra, Canberra, ACT, 2601, Australia.,Collaborative Research in Bioactives and Biomarkers (CRIBB) Group, Canberra, ACT, 2601, Australia
| | - Juliana S Graça
- Dept. of Food Science, Faculty of Food Engineering, Univ. of Campinas, Campinas, São Paulo, Brazil
| | - Anderson S Sant'Ana
- Dept. of Food Science, Faculty of Food Engineering, Univ. of Campinas, Campinas, São Paulo, Brazil
| | - S Ajlouni
- School of Agriculture & Food, Faculty of Veterinary & Agricultural Sciences, The Univ. of Melbourne, Melbourne, VIC, 3010, Australia
| | - T Vasiljevic
- Advanced Food Systems Research Unit, College of Health and Biomedicine, Victoria Univ., Werribee, Victoria, 3030, Australia
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Martins AA, Santos-Junior VA, Filho ER, Silva HL, Ferreira MVS, Graça JS, Esmerino EA, Lollo PC, Freitas MQ, Sant'Ana AS, Costa LEO, Raices RS, Silva MC, da Cruz AG, Barros ME. Probiotic Prato cheese consumption attenuates development of renal calculi in animal model of urolithiasis. J Funct Foods 2018. [DOI: 10.1016/j.jff.2018.08.041] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
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11
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Graça JS, de Oliveira RF, de Moraes ML, Ferreira M. Amperometric glucose biosensor based on layer-by-layer films of microperoxidase-11 and liposome-encapsulated glucose oxidase. Bioelectrochemistry 2014; 96:37-42. [PMID: 24491835 DOI: 10.1016/j.bioelechem.2014.01.001] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [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: 09/23/2013] [Revised: 12/27/2013] [Accepted: 01/04/2014] [Indexed: 12/22/2022]
Abstract
An important step in several bioanalytical applications is the immobilization of biomolecules. Accordingly, this procedure must be carefully chosen to preserve their biological structure and fully explore their properties. For this purpose, we combined the versatility of the layer-by-layer (LbL) method for the immobilization of biomolecules with the protective behavior of liposome-encapsulated systems to fabricate a novel amperometric glucose biosensor. To obtain the biosensing unit, an LbL film of the H2O2 catalyst polypeptide microperoxidase-11 (MP-11) was assembled onto an indium-tin oxide (ITO) electrode followed by the deposition of a liposome-encapsulated glucose oxidase (GOx) layer. The biosensor response toward glucose detection showed a sensitivity of 0.91±0.09 (μA/cm2)/mM and a limit of detection (LOD) of 8.6±1.1 μM, demonstrating an improved performance compared to similar biosensors with a single phospholipid-liposome or even containing a non-encapsulated GOx layer. Finally, glucose detection was also performed in a zero-lactose milk sample to demonstrate the potential of the biosensor for food analysis.
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Affiliation(s)
- J S Graça
- Federal University of São Carlos, UFSCar, Campus Sorocaba, 18052-780 Sorocaba, SP, Brazil.
| | - R F de Oliveira
- São Paulo State University, UNESP, Postgraduate Program in Materials Science and Technology, 17033-360 Bauru, SP, Brazil.
| | - M L de Moraes
- Federal University of São Paulo, UNIFESP, Campus São José dos Campos, 12231-280 São José dos Campos, SP, Brazil.
| | - M Ferreira
- Federal University of São Carlos, UFSCar, Campus Sorocaba, 18052-780 Sorocaba, SP, Brazil.
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