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Mena Navarro MP, Espinosa Bernal MA, Alvarado Osuna C, Ramos López MÁ, Amaro Reyes A, Arvizu Gómez JL, Pacheco Aguilar JR, Saldaña Gutiérrez C, Pérez Moreno V, Rodríguez Morales JA, García Gutiérrez MC, Álvarez Hidalgo E, Nuñez Ramírez J, Hernández Flores JL, Campos Guillén J. A Study of Resistome in Mexican Chili Powder as a Public Health Risk Factor. Antibiotics (Basel) 2024; 13:182. [PMID: 38391568 PMCID: PMC10886038 DOI: 10.3390/antibiotics13020182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2024] [Revised: 02/02/2024] [Accepted: 02/10/2024] [Indexed: 02/24/2024] Open
Abstract
Chili powder is an important condiment around the world. However, according to various reports, the presence of pathogenic microorganisms could present a public health risk factor during its consumption. Therefore, microbiological quality assessment is required to understand key microbial functional traits, such as antibiotic resistance genes (ARGs). In this study, metagenomic next-generation sequencing (mNGS) and bioinformatics analysis were used to characterize the comprehensive profiles of the bacterial community and antibiotic resistance genes (ARGs) in 15 chili powder samples from different regions of Mexico. The initial bacterial load showed aerobic mesophilic bacteria (AMB) ranging between 6 × 103 and 7 × 108 CFU/g, sporulated mesophilic bacteria (SMB) from 4.3 × 103 to 2 × 109 CFU/g, and enterobacteria (En) from <100 to 2.3 × 106 CFU/g. The most representative families in the samples were Bacillaceae and Enterobacteriaceae, in which 18 potential pathogen-associated species were detected. In total, the resistome profile in the chili powder contained 68 unique genes, which conferred antibiotic resistance distributed in 13 different classes. Among the main classes of antibiotic resistance genes with a high abundance in almost all the samples were those related to multidrug, tetracycline, beta-lactam, aminoglycoside, and phenicol resistance. Our findings reveal the utility of mNGS in elucidating microbiological quality in chili powder to reduce the public health risks and the spread of potential pathogens with antibiotic resistance mechanisms.
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Affiliation(s)
- Mayra Paola Mena Navarro
- Facultad de Química, Universidad Autónoma de Querétaro, Cerro de las Campanas S/N, Querétaro 76010, Mexico
| | | | - Claudia Alvarado Osuna
- Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco, Guadalajara 44270, Mexico
| | - Miguel Ángel Ramos López
- Facultad de Química, Universidad Autónoma de Querétaro, Cerro de las Campanas S/N, Querétaro 76010, Mexico
| | - Aldo Amaro Reyes
- Facultad de Química, Universidad Autónoma de Querétaro, Cerro de las Campanas S/N, Querétaro 76010, Mexico
| | - Jackeline Lizzeta Arvizu Gómez
- Secretaría de Investigación y Posgrado, Centro Nayarita de Innovación y Transferencia de Tecnología (CENITT), Universidad Autónoma de Nayarit, Tepic 63173, Mexico
| | | | - Carlos Saldaña Gutiérrez
- Facultad de Ciencias Naturales, Universidad Autónoma de Querétaro, Av. De las Ciencias S/N, Querétaro 76220, Mexico
| | - Victor Pérez Moreno
- Facultad de Química, Universidad Autónoma de Querétaro, Cerro de las Campanas S/N, Querétaro 76010, Mexico
| | | | | | - Erika Álvarez Hidalgo
- Facultad de Química, Universidad Autónoma de Querétaro, Cerro de las Campanas S/N, Querétaro 76010, Mexico
| | - Jorge Nuñez Ramírez
- Facultad de Química, Universidad Autónoma de Querétaro, Cerro de las Campanas S/N, Querétaro 76010, Mexico
| | | | - Juan Campos Guillén
- Facultad de Química, Universidad Autónoma de Querétaro, Cerro de las Campanas S/N, Querétaro 76010, Mexico
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Păucean A, Kádár CB, Simon E, Vodnar DC, Ranga F, Rusu IE, Vișan VG, Socaci SA, Man S, Chiș MS, Pop A, Tanislav AE, Mureșan V. Freeze-Dried Powder of Fermented Chili Paste-New Approach to Cured Salami Production. Foods 2022; 11:foods11223716. [PMID: 36429308 PMCID: PMC9689597 DOI: 10.3390/foods11223716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2022] [Revised: 11/07/2022] [Accepted: 11/15/2022] [Indexed: 11/22/2022] Open
Abstract
Fermented chili powders were obtained through the freeze-drying of fermented chili pastes and used as a condiment, acidifier, antioxidant, colorant, and microbial starter carrier in fermented salami production. Fermented chili powders were examined regarding carbohydrates, organic acids, vitamin C, phenolic compounds, carotenoids, and aroma profile. High concentrations of lactic (10.57-12.20%) and acetic acids (3.39-4.10%) were recorded. Vitamin C content was identified in the range of 398-1107 mg/100 g, with maximum values for C. annuum cv. Cayenne chili powder. Phenolic compounds showed values between 302-771 mg/100 g. Total carotenoid content was identified between 544-2462 µg/g, with high concentrations of capsanthin esters. Aroma profile analysis evidenced specific compounds (1-hexanol, 2-hexanol, hexenal, E-2-hexenal) with sensory importance and a more complex spectrum for Capsicum chinense cultivar. Plant-specific lactic acid bacteria showed dominance both in fermented chili paste, chili powder, and salami. Lactic and acetic acids from the fermented chili powder reduced the pH of the filling immediately, having a stabilizing effect on the meat. Nor molds or pathogens were identified in outer limits. Based on these results, fermented chili powders could be used as starter carriers in the production of fermented meat products for exceptional sensory properties and food safety management.
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Affiliation(s)
- Adriana Păucean
- Department of Food Engineering, Faculty of Food Science and Technology, University of Agricultural Sciences and Veterinary Medicine, 3–5 Mănăștur Street, 400372 Cluj-Napoca, Romania
- Correspondence:
| | - Csaba Balázs Kádár
- Department of Food Engineering, Faculty of Food Science and Technology, University of Agricultural Sciences and Veterinary Medicine, 3–5 Mănăștur Street, 400372 Cluj-Napoca, Romania
| | - Elemér Simon
- Department of Food Science, Faculty of Food Science and Technology, University of Agricultural Sciences and Veterinary Medicine, 3–5 Calea Mănăstur, 400372 Cluj-Napoca, Romania
| | - Dan Cristian Vodnar
- Department of Food Science, Faculty of Food Science and Technology, University of Agricultural Sciences and Veterinary Medicine, 3–5 Calea Mănăstur, 400372 Cluj-Napoca, Romania
| | - Floricuța Ranga
- Department of Food Science, Faculty of Food Science and Technology, University of Agricultural Sciences and Veterinary Medicine, 3–5 Calea Mănăstur, 400372 Cluj-Napoca, Romania
| | - Iulian Eugen Rusu
- Department of Food Engineering, Faculty of Food Science and Technology, University of Agricultural Sciences and Veterinary Medicine, 3–5 Mănăștur Street, 400372 Cluj-Napoca, Romania
| | - Vasile-Gheorghe Vișan
- Department of Fundamental Sciences, Faculty of Animal Science and Biotechnologies, University of Agricultural Sciences and Veterinary Medicine, 3–5 Mănăștur Street, 400372 Cluj-Napoca, Romania
| | - Sonia-Ancuța Socaci
- Department of Food Science, Faculty of Food Science and Technology, University of Agricultural Sciences and Veterinary Medicine, 3–5 Calea Mănăstur, 400372 Cluj-Napoca, Romania
| | - Simona Man
- Department of Food Engineering, Faculty of Food Science and Technology, University of Agricultural Sciences and Veterinary Medicine, 3–5 Mănăștur Street, 400372 Cluj-Napoca, Romania
| | - Maria Simona Chiș
- Department of Food Engineering, Faculty of Food Science and Technology, University of Agricultural Sciences and Veterinary Medicine, 3–5 Mănăștur Street, 400372 Cluj-Napoca, Romania
| | - Anamaria Pop
- Department of Food Engineering, Faculty of Food Science and Technology, University of Agricultural Sciences and Veterinary Medicine, 3–5 Mănăștur Street, 400372 Cluj-Napoca, Romania
| | - Anda E. Tanislav
- Department of Food Engineering, Faculty of Food Science and Technology, University of Agricultural Sciences and Veterinary Medicine, 3–5 Mănăștur Street, 400372 Cluj-Napoca, Romania
| | - Vlad Mureșan
- Department of Food Engineering, Faculty of Food Science and Technology, University of Agricultural Sciences and Veterinary Medicine, 3–5 Mănăștur Street, 400372 Cluj-Napoca, Romania
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Hernández Gómez YF, González Espinosa J, Ramos López MÁ, Arvizu Gómez JL, Saldaña C, Rodríguez Morales JA, García Gutiérrez MC, Pérez Moreno V, Álvarez Hidalgo E, Nuñez Ramírez J, Jones GH, Hernández Flores JL, Campos Guillén J. Insights into the Bacterial Diversity and Detection of Opportunistic Pathogens in Mexican Chili Powder. Microorganisms 2022; 10:microorganisms10081677. [PMID: 36014094 PMCID: PMC9413335 DOI: 10.3390/microorganisms10081677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 08/08/2022] [Accepted: 08/18/2022] [Indexed: 11/16/2022] Open
Abstract
Chili powder is the most frequently consumed spice in Mexican diets. Thus, the dissemination of microorganisms associated with chili powder derived from Capsicum annuum L. is significant during microbial quality analysis, with special attention on detection of potential pathogens. The results presented here describe the initial characterization of bacterial community structure in commercial chili powder samples. Our results demonstrate that, within the domain Bacteria, the most abundant family was Bacillaceae, with a relative abundance of 99% in 71.4% of chili powder samples, while 28.6% of samples showed an average relative abundance of 60% for the Enterobacteriaceae family. Bacterial load for aerobic mesophilic bacteria (AMB) ranged from 104 to 106 cfu/g, while for sporulated mesophilic bacteria (SMB), the count ranged from 102 to 105 cfu/g. Bacillus cereus sensu lato (s.l.) was observed at ca. ˂600 cfu/g, while the count for Enterobacteriaceae ranged from 103 to 106 cfu/g, Escherichia coli and Salmonella were not detected. Fungal and yeast counts ranged from 102 to 105 cfu/g. Further analysis of the opportunistic pathogens isolated, such as B. cereus s.l. and Kosakonia cowanii, using antibiotic-resistance profiles and toxinogenic characteristics, revealed the presence of extended-spectrum β-lactamases (ESBLs) and Metallo-β-lactamases (MBLs) in these organisms. These results extend our knowledge of bacterial diversity and the presence of opportunistic pathogens associated with Mexican chili powder and highlight the potential health risks posed by its use through the spread of antibiotic-resistance and the production of various toxins. Our findings may be useful in developing procedures for microbial control during chili powder production.
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Affiliation(s)
- Yoali Fernanda Hernández Gómez
- Facultad de Ciencias Naturales, Universidad Autónoma de Querétaro, Av. De las Ciencias s/n, Santiago de Querétaro 76220, Mexico
| | - Jacqueline González Espinosa
- Facultad de Ciencias Naturales, Universidad Autónoma de Querétaro, Av. De las Ciencias s/n, Santiago de Querétaro 76220, Mexico
| | - Miguel Ángel Ramos López
- Facultad de Química, Universidad Autónoma de Querétaro, Cerro de las Campanas s/n, Santiago de Querétaro 76010, Mexico
| | - Jackeline Lizzeta Arvizu Gómez
- Secretaría de Investigación y Posgrado, Centro Nayarita de Innovación y Transferencia de Tecnología (CENITT), Universidad Autónoma de Nayarit, Tepic 63173, Mexico
| | - Carlos Saldaña
- Facultad de Ciencias Naturales, Universidad Autónoma de Querétaro, Av. De las Ciencias s/n, Santiago de Querétaro 76220, Mexico
| | - José Alberto Rodríguez Morales
- Facultad de Ingeniería, Universidad Autónoma de Querétaro, Cerro de las Campanas s/n, Santiago de Querétaro 76010, Mexico
| | | | - Victor Pérez Moreno
- Facultad de Química, Universidad Autónoma de Querétaro, Cerro de las Campanas s/n, Santiago de Querétaro 76010, Mexico
| | - Erika Álvarez Hidalgo
- Facultad de Química, Universidad Autónoma de Querétaro, Cerro de las Campanas s/n, Santiago de Querétaro 76010, Mexico
| | - Jorge Nuñez Ramírez
- Facultad de Química, Universidad Autónoma de Querétaro, Cerro de las Campanas s/n, Santiago de Querétaro 76010, Mexico
| | - George H. Jones
- Department of Biology, Emory University, Atlanta, GA 30322, USA
| | - José Luis Hernández Flores
- Centro de Investigación y de Estudios Avanzados del IPN, Irapuato 36824, Mexico
- Correspondence: (J.L.H.F.); (J.C.G.)
| | - Juan Campos Guillén
- Facultad de Química, Universidad Autónoma de Querétaro, Cerro de las Campanas s/n, Santiago de Querétaro 76010, Mexico
- Correspondence: (J.L.H.F.); (J.C.G.)
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Detection of Bacillus cereus sensu lato Isolates Posing Potential Health Risks in Mexican Chili Powder. Microorganisms 2021; 9:microorganisms9112226. [PMID: 34835349 PMCID: PMC8618785 DOI: 10.3390/microorganisms9112226] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2021] [Revised: 10/20/2021] [Accepted: 10/21/2021] [Indexed: 01/10/2023] Open
Abstract
The potential presence of spore-forming bacteria related to the Bacillus cereus group in Mexican chili powder elaborated from Capsicum annuum L. is of commercial and clinical interest, because chili powder is an essential spice in the Mexican diet and in diets around the globe. To facilitate detection and isolation of members of this group of spore-forming bacteria from Mexican chili powder samples, we identified colonies that grew on agar medium selective for Bacillus cereus sensu lato, supplemented with polymyxin B (10 µg/mL) and ampicillin (10 to 100 µg/mL). The presumptive B. cereus (s.l.) isolates were tested using a tRNACys-PCR-based approach and the results identified species related phylogenetically to B. cereus, B. thuringiensis, and B. toyonensis. Their toxigenic potential was assessed by serological tests to detect enterotoxins (Nhe and Hbl) and by PCR targeting the hemolysin BL (hbl) component C (hblC) and non-hemolytic enterotoxin component A (nheA). The antibiotic profiles of the isolates showed a high resistance to β-lactams (100% of the isolates), trimethoprim-sulfamethoxazole (100%), tetracycline (90%), erythromycin (77%), clindamycin (74%), and chloramphenicol (42%). Our results indicate the presence of B. cereus s.l. with toxigenic characteristics in Mexican chili powder. Because of the potential for these organisms to cause disease through their production of various toxins, and resistance to antibiotics, we recommend that a microbiological risk assessment must be considered in the Mexican regulatory requirements.
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5
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György É, Laslo É, Antal M, András CD. Antibiotic resistance pattern of the allochthonous bacteria isolated from commercially available spices. Food Sci Nutr 2021; 9:4550-4560. [PMID: 34401102 PMCID: PMC8358356 DOI: 10.1002/fsn3.2433] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2021] [Revised: 04/30/2021] [Accepted: 06/06/2021] [Indexed: 12/11/2022] Open
Abstract
Spices are often used in dried form, sometimes with significant microbial contamination including pathogenic and food spoilage bacteria. The antibiotic resistance represents an additional risk for food industry, and it is worthy of special attention as spices are important food additives. During our work, we examined the microbiological quality of 50 different spices with cultivation methods on diverse selective media. The identification of the most representative bacteria was carried out using 16S rDNA gene sequence analysis. Antibiotic resistance profiling of twelve identified Bacillus species (B. subtilis subsp. stercoris BCFK, B. licheniformis BCLS, B. siamensis SZBC, B. zhangzhouensis BCTA, B. altitudinis SALKÖ, B. velezensis CVBC, B. cereus SALÖB isolate, B. tequilensis KOPS, B. filamentosus BMBC, B. subtilis subsp. subtilis PRBC2, B. safensis BMPS, and B. mojavensis BCFK2 isolate) was performed using the standard disk-diffusion method against 32 antibiotics. The study showed that the majority resistance was obtained against penicillin G (100%), oxacillin (91.67%), amoxyclav (91.67%), rifampicin (75%), and azithromycin (75%). Our findings suggest that spices harbor multidrug-resistant bacteria.
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Affiliation(s)
- Éva György
- Department of Food ScienceFaculty of Economics, Socio‐Human Sciences and EngineeringSapientia Hungarian University of TransylvaniaMiercurea CiucRomania
| | - Éva Laslo
- Department of BioengineeringFaculty of Economics, Socio‐Human Sciences and EngineeringSapientia Hungarian University of TransylvaniaMiercurea CiucRomania
| | - Márta Antal
- Department of Food ScienceFaculty of Economics, Socio‐Human Sciences and EngineeringSapientia Hungarian University of TransylvaniaMiercurea CiucRomania
| | - Csaba Dezső András
- Department of Food ScienceFaculty of Economics, Socio‐Human Sciences and EngineeringSapientia Hungarian University of TransylvaniaMiercurea CiucRomania
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Barbosa S, Saurina J, Puignou L, Núñez O. Classification and Authentication of Paprika by UHPLC-HRMS Fingerprinting and Multivariate Calibration Methods (PCA and PLS-DA). Foods 2020; 9:foods9040486. [PMID: 32294945 PMCID: PMC7230234 DOI: 10.3390/foods9040486] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 03/30/2020] [Accepted: 03/31/2020] [Indexed: 12/13/2022] Open
Abstract
In this study, the feasibility of non-targeted UHPLC-HRMS fingerprints as chemical descriptors to address the classification and authentication of paprika samples was evaluated. Non-targeted UHPLC-HRMS fingerprints were obtained after a simple sample extraction method and C18 reversed-phase separation. Fingerprinting data based on signal intensities as a function of m/z values and retention times were registered in negative ion mode using a q-Orbitrap high-resolution mass analyzer, and the obtained non-targeted UHPLC-HRMS fingerprints subjected to unsupervised principal component analysis (PCA) and supervised partial least squares regression-discriminant analysis (PLS-DA) to study sample discrimination and classification. A total of 105 paprika samples produced in three different regions, La Vera PDO and Murcia PDO, in Spain, and the Czech Republic, and all of them composed of samples of at least two different taste varieties, were analyzed. Non-targeted UHPLC-HRMS fingerprints demonstrated to be excellent sample chemical descriptors to achieve the authentication of paprika production regions with 100% sample classification rates by PLS-DA. Besides, the obtained fingerprints were also able to perfectly discriminate among the different paprika taste varieties in all the studied cases, even in the case of the different La Vera PDO paprika tastes (sweet, bittersweet, and spicy) which are produced in a very small region.
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Affiliation(s)
- Sergio Barbosa
- Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Martí i Franquès 1-11, E08028 Barcelona, Spain; (S.B.); (J.S.); (L.P.)
| | - Javier Saurina
- Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Martí i Franquès 1-11, E08028 Barcelona, Spain; (S.B.); (J.S.); (L.P.)
- Research Institute in Food Nutrition and Food Safety, University of Barcelona, Recinte Torribera, Av. Prat de la Riba 171, Edifici de Recerca (Gaudí), Santa Coloma de Gramenet, E08921 Barcelona, Spain
| | - Lluís Puignou
- Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Martí i Franquès 1-11, E08028 Barcelona, Spain; (S.B.); (J.S.); (L.P.)
- Research Institute in Food Nutrition and Food Safety, University of Barcelona, Recinte Torribera, Av. Prat de la Riba 171, Edifici de Recerca (Gaudí), Santa Coloma de Gramenet, E08921 Barcelona, Spain
| | - Oscar Núñez
- Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Martí i Franquès 1-11, E08028 Barcelona, Spain; (S.B.); (J.S.); (L.P.)
- Research Institute in Food Nutrition and Food Safety, University of Barcelona, Recinte Torribera, Av. Prat de la Riba 171, Edifici de Recerca (Gaudí), Santa Coloma de Gramenet, E08921 Barcelona, Spain
- Serra Húnter Fellow, Generalitat de Catalunya, Rambla de Catalunya 19-21, E08007 Barcelona, Spain
- Correspondence: ; Tel.: +34-93-403-3706
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Barbosa S, Campmajó G, Saurina J, Puignou L, Núñez O. Determination of Phenolic Compounds in Paprika by Ultrahigh Performance Liquid Chromatography-Tandem Mass Spectrometry: Application to Product Designation of Origin Authentication by Chemometrics. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:591-602. [PMID: 31859496 DOI: 10.1021/acs.jafc.9b06054] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
An ultrahigh performance liquid chromatography-electrospray-tandem mass spectrometry method was developed for the determination of 36 phenolic compounds in paprika. The proposed method showed good method performance with limits of quantitation between 0.03 and 50 μg/L for 16 compounds and between 50 μg/L and 1 mg/L for 12 compounds. Good linearity (R2 > 0.995), run-to-run and day-to-day precisions (%RSD values < 12.3 and < 19.2%, respectively), and trueness (relative errors < 15.0%) were obtained. The proposed method was applied to the analysis of 111 paprika samples from different production regions: Spain (La Vera PDO and Murcia PDO) and Czech Republic, each one including different flavor varieties (sweet, bittersweet, and spicy). Phenolic profiles and concentration levels showed to be good chemical descriptors to achieve paprika classification and authentication according to the production region by principal component analysis and partial least squares regression-discriminant analysis. In addition, perfect classification among flavor varieties for Murcia PDO and Czech Republic samples was also obtained.
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Affiliation(s)
- Sergio Barbosa
- Department of Chemical Engineering and Analytical Chemistry , University of Barcelona , Martí i Franquès 1-11 , E-08028 Barcelona , Spain
| | - Guillem Campmajó
- Department of Chemical Engineering and Analytical Chemistry , University of Barcelona , Martí i Franquès 1-11 , E-08028 Barcelona , Spain
- Research Institute in Food Nutrition and Food Safety , University of Barcelona . Av. Prat de la Riba 171 , Edifici Recerca (Gaudí), E-08901 Santa Coloma de Gramenet, Barcelona , Spain
| | - Javier Saurina
- Department of Chemical Engineering and Analytical Chemistry , University of Barcelona , Martí i Franquès 1-11 , E-08028 Barcelona , Spain
- Research Institute in Food Nutrition and Food Safety , University of Barcelona . Av. Prat de la Riba 171 , Edifici Recerca (Gaudí), E-08901 Santa Coloma de Gramenet, Barcelona , Spain
| | - Lluis Puignou
- Department of Chemical Engineering and Analytical Chemistry , University of Barcelona , Martí i Franquès 1-11 , E-08028 Barcelona , Spain
- Research Institute in Food Nutrition and Food Safety , University of Barcelona . Av. Prat de la Riba 171 , Edifici Recerca (Gaudí), E-08901 Santa Coloma de Gramenet, Barcelona , Spain
| | - Oscar Núñez
- Department of Chemical Engineering and Analytical Chemistry , University of Barcelona , Martí i Franquès 1-11 , E-08028 Barcelona , Spain
- Research Institute in Food Nutrition and Food Safety , University of Barcelona . Av. Prat de la Riba 171 , Edifici Recerca (Gaudí), E-08901 Santa Coloma de Gramenet, Barcelona , Spain
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