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Xavier P, Rodrigues PM, Silva CLM. Shelf-Life Management and Ripening Assessment of 'Hass' Avocado ( Persea americana) Using Deep Learning Approaches. Foods 2024; 13:1150. [PMID: 38672823 PMCID: PMC11049431 DOI: 10.3390/foods13081150] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 03/21/2024] [Accepted: 04/04/2024] [Indexed: 04/28/2024] Open
Abstract
Avocado production is mostly confined to tropical and subtropical regions, leading to lengthy distribution channels that, coupled with their unpredictable post-harvest behavior, render avocados susceptible to significant loss and waste. To enhance the monitoring of 'Hass' avocado ripening, a data-driven tool was developed using a deep learning approach. This study involved monitoring 478 avocados stored in three distinct storage environments, using a 5-stage Ripening Index to classify each fruit's ripening phase based on their shared characteristics. These categories were paired with daily photographic records of the avocados, resulting in a database of labeled images. Two convolutional neural network models, AlexNet and ResNet-18, were trained using transfer learning techniques to identify distinct ripening indicators, enabling the prediction of ripening stages and shelf-life estimations for new unseen data. The approach achieved a final prediction accuracy of 88.8% for the ripening assessment, with 96.7% of predictions deviating by no more than half a stage from their actual classifications when considering the best side of the samples. The average shelf-life estimates based on the attributed classifications were within 0.92 days of the actual shelf-life, whereas the predictions made by the models had an average deviation of 0.96 days from the actual shelf-life.
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Affiliation(s)
| | | | - Cristina L. M. Silva
- CBQF—Centro de Biotecnologia e Química Fina—Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal; (P.X.); (P.M.R.)
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Saguy IS, Silva CLM, Cohen E. Author Correction: Emerging challenges and opportunities in innovating food science technology and engineering education. NPJ Sci Food 2024; 8:12. [PMID: 38351157 PMCID: PMC10864349 DOI: 10.1038/s41538-024-00256-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2024] Open
Affiliation(s)
- I S Saguy
- The Robert H. Smith Faculty of Agriculture, Food & Environment, The Hebrew University of Jerusalem, Rehovot, Israel.
| | - C L M Silva
- Universidade Católica Portuguesa, CBQF-Centro de Biotecnologia e Química Fina-Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, 4169-005, Porto, Portugal
| | - E Cohen
- Gilford Glazer Faculty of Business Administration, Ben-Gurion University of the Negev Beer-Sheva, Be'er Sheva, Israel
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Bhutkar S, Brandão TRS, Silva CLM, Miller FA. Application of Ultrasound Treatments in the Processing and Production of High-Quality and Safe-to-Drink Kiwi Juice. Foods 2024; 13:328. [PMID: 38275695 PMCID: PMC10815408 DOI: 10.3390/foods13020328] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2023] [Revised: 01/12/2024] [Accepted: 01/18/2024] [Indexed: 01/27/2024] Open
Abstract
This study explores the potential of thermosonication as an alternative to traditional heat treatments, such as pasteurization, in the processing of fruit juices. Conventional methods often lead to undesirable quality changes in fruit juices, whereas thermosonication offers promising results regarding microbial inactivation and quality preservation. This work focused on the inactivation kinetics of Listeria innocua 2030c, a surrogate for pathogenic L. monocytogenes, in kiwifruit juice using thermosonication at 45 °C, 50 °C, and 55 °C. These treatments were compared with equivalent heat treatments. Quality attributes of the juice were also evaluated to assess process efficiency. Survival data of L. innocua were fitted with the Weibull model, estimating first decimal reduction times (δ) and shape parameters (n). The results reveal temperature and process dependencies on δ, while n remains mostly temperature and treatment independent. Thermosonication outperforms heat treatment, achieving higher L. innocua reductions while retaining quality attributes like pH, soluble solid content, and total phenolics and chlorophylls. Thermosonication at 55 °C stands out, providing a 6.2-log-cycle reduction in just 3 min with superior quality retention. These findings highlight the synergistic effect of temperature and ultrasound, making mild heat processes feasible while enhancing product quality. Thermosonication, particularly at 55 °C, emerges as an effective alternative to traditional thermal treatments for fruit juices, offering improved microbial safety without compromising product quality.
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Affiliation(s)
| | | | | | - Fátima A. Miller
- CBQF—Centro de Biotecnologia e Química Fina—Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal; (S.B.); (T.R.S.B.); (C.L.M.S.)
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Saguy IS, Silva CLM, Cohen E. Emerging challenges and opportunities in innovating food science technology and engineering education. NPJ Sci Food 2024; 8:5. [PMID: 38216591 PMCID: PMC10786934 DOI: 10.1038/s41538-023-00243-w] [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: 07/25/2023] [Accepted: 12/08/2023] [Indexed: 01/14/2024] Open
Abstract
Progress in science, technology, innovation, and digital capabilities call for reassessing food science, technology, and engineering (FST&E) education and research programs. This survey targeted global professionals and students across food disciplines and nutrition. Its main objectives included assessing the status of FST&E higher education, identifying challenges and opportunities, and furnishing recommendations. Seven topics affecting the future of the FST&E curricula were evaluated by the panel as 'High' to 'Very high', namely: 'Critical thinking', followed by 'Problem-solving projects', 'Teamwork/collaboration', 'Innovation/Open innovation' and 'Multidisciplinary'. The importance of academic partnership/collaboration with the Food Industry and Nutrition Sciences was demonstrated. Significant positive roles of the food industry in collaboration and partnerships were found. Other essential food industry attributes were related to internships, education, strategy, and vision. Collaboration between FST&E and nutrition sciences indicated the high standing of this direction. The need to integrate or converge nutrition sciences and FST&E is emphasized, especially with the growing consumer awareness of health and wellness. The study provides insights into new education and learning opportunities and new topics for future curricula.
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Affiliation(s)
- I S Saguy
- The Robert H. Smith Faculty of Agriculture, Food & Environment, The Hebrew University of Jerusalem, Rehovot, Israel.
| | - C L M Silva
- Universidade Católica Portuguesa, CBQF-Centro de Biotecnologia e Química Fina-Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, 4169-005, Porto, Portugal
| | - E Cohen
- Gilford Glazer Faculty of Business Administration, Ben-Gurion University of the Negev Beer-Sheva, Be'er Sheva, Israel
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Miller FA, Brandão TRS, Silva CLM. New Approaches for Improving the Quality of Processed Fruits and Vegetables and Their By-Products. Foods 2023; 12:foods12071353. [PMID: 37048174 PMCID: PMC10093689 DOI: 10.3390/foods12071353] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 03/17/2023] [Accepted: 03/18/2023] [Indexed: 04/14/2023] Open
Abstract
The 2030 Sustainable Development Agenda calls for all social actors to contribute to significant societal and environmental issues [...].
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Affiliation(s)
- Fátima A Miller
- Universidade Católica Portuguesa, CBQF-Centro de Biotecnologia e Química Fina-Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal
| | - Teresa R S Brandão
- Universidade Católica Portuguesa, CBQF-Centro de Biotecnologia e Química Fina-Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal
| | - Cristina L M Silva
- Universidade Católica Portuguesa, CBQF-Centro de Biotecnologia e Química Fina-Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal
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Boghossian M, Brassesco ME, Miller FA, Silva CLM, Brandão TRS. Thermosonication Applied to Kiwi Peel: Impact on Nutritional and Microbiological Indicators. Foods 2023; 12:foods12030622. [PMID: 36766150 PMCID: PMC9914669 DOI: 10.3390/foods12030622] [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: 01/16/2023] [Revised: 01/26/2023] [Accepted: 01/30/2023] [Indexed: 02/04/2023] Open
Abstract
The peels of many fruits are rich sources of nutrients, although they are not commonly consumed. If they are properly decontaminated, they can be used as healthy food ingredients reducing food waste. The objective was to apply thermosonication processes to kiwi peel and evaluate the impact on Listeria innocua survival (a non-pathogenic surrogate of L. monocytogenes) and key nutrients and quality indicators: proteins, fibers, minerals (Ca, K, Mg, Na, and P), chlorophylls, and phenolic contents. Kiwi peels were artificially inoculated with L. innocua and thermal and thermosonication treatments were performed at 55 °C and 60 °C for 30 and 15 min maximum, respectively. Bacteria were enumerated through treatment time, and quality indicators were assessed before and at the end of treatments. A Weibull model with a decimal reduction time (D-value) was successfully used in L. innocua survival data fits. Results showed that coupling temperature to ultrasound had a synergistic effect on bacteria inactivation with significant decreases in D-values. Thermosonication at 60 °C was the most effective in terms of protein, fiber, chlorophylls, and phenolics retention. Minerals were not significantly affected by all treatments. Applying thermosonication to kiwi peel was more effective for decontamination than thermal treatments at the same temperature while allowing the retention of healthy compounds.
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Phuon V, Ramos IN, Brandão TRS, Silva CLM. Assessment of the impact of drying processes on orange peel quality characteristics. J FOOD PROCESS ENG 2022. [DOI: 10.1111/jfpe.13794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Vichearavann Phuon
- CBQF ‐ Centro de Biotecnologia e Química Fina – Laboratório Associado, Escola Superior de Biotecnologia Universidade Católica Portuguesa Porto Portugal
- Scuola di Scienze Agrarie, Forestali, Alimentari ed Ambientali Università degli Studi della Basilicata Potenza Potenza Italy
| | - Inês N. Ramos
- CBQF ‐ Centro de Biotecnologia e Química Fina – Laboratório Associado, Escola Superior de Biotecnologia Universidade Católica Portuguesa Porto Portugal
| | - Teresa R. S. Brandão
- CBQF ‐ Centro de Biotecnologia e Química Fina – Laboratório Associado, Escola Superior de Biotecnologia Universidade Católica Portuguesa Porto Portugal
| | - Cristina L. M. Silva
- CBQF ‐ Centro de Biotecnologia e Química Fina – Laboratório Associado, Escola Superior de Biotecnologia Universidade Católica Portuguesa Porto Portugal
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Sroy S, Miller FA, Fundo JF, Silva CLM, Brandão TRS. Freeze-Drying Processes Applied to Melon Peel: Assessment of Physicochemical Attributes and Intrinsic Microflora Survival during Storage. Foods 2022; 11:foods11101499. [PMID: 35627069 PMCID: PMC9141695 DOI: 10.3390/foods11101499] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 05/14/2022] [Accepted: 05/19/2022] [Indexed: 11/16/2022] Open
Abstract
Melon peel is recognized as a source of healthy nutrients and oxidant compounds. Being considered a non-edible part with no profit value, large amounts of melon rinds are discharged by fruit industries. Innovative food ingredients with potential health benefits may arise if these parts were conveniently transformed. The objective was to freeze-dry small melon peel cubes to attain a potential edible matrix. An ozone pre-treatment was applied seeking decontamination purposes and quality retention. The effect of these processes was assessed in terms of physicochemical parameters (moisture content, water activity and color), bioactive compounds (total phenolics, vitamin C and chlorophylls) and antioxidant capacity, during 7 weeks of storage at room temperature. Intrinsic microflora (mesophylls, yeasts and molds) were also monitored. Results showed that the freeze-drying process allowed retention of the most bioactive compounds analyzed, except for total phenolic content. In this case, the ozone pre-treatment was important for phenolics preservation. During the storage period, ozonated samples presented a higher content of bioactive compounds. In terms of microflora, the ozone and freeze-drying effects were not significant. Freeze-drying proved to be a suitable preservation method for melon peel. The ozone impact was not relevant in terms of decontamination.
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Cruz RMS, Silva CLM, Vieira MC. CIBIA XII
—Iberoamerican Congress of Food Engineering, 2019. J FOOD PROCESS ENG 2022. [DOI: 10.1111/jfpe.14028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Rui M. S. Cruz
- Department of Food Engineering, Institute of Engineering Universidade do Algarve Faro Portugal
- MED‐ Mediterranean Institute for Agriculture, Environment and Development, Faculty of Sciences and Technology Universidade do Algarve Faro Portugal
| | - Cristina L. M. Silva
- CBQF ‐ Centro de Biotecnologia e Química Fina ‐ Laboratório Associado, Escola Superior de Biotecnologia Universidade Católica Portuguesa Porto Portugal
| | - Margarida C. Vieira
- Department of Food Engineering, Institute of Engineering Universidade do Algarve Faro Portugal
- MED‐ Mediterranean Institute for Agriculture, Environment and Development, Faculty of Sciences and Technology Universidade do Algarve Faro Portugal
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Georgiev R, Kalaydzhiev H, Ivanova P, Silva CLM, Chalova VI. Multifunctionality of Rapeseed Meal Protein Isolates Prepared by Sequential Isoelectric Precipitation. Foods 2022; 11:foods11040541. [PMID: 35206016 PMCID: PMC8870837 DOI: 10.3390/foods11040541] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 01/31/2022] [Accepted: 02/05/2022] [Indexed: 02/04/2023] Open
Abstract
Rapeseed meal is a by-product of the oil-producing industry with a currently underestimated application. Two protein isolates, PI2.5–8.5 or PI10.5–2.5, were obtained from industrial rapeseed meal after treatment with an aqueous ethanol solution. The alkaline-extracted proteins were sequentially precipitated by two different modes, from pH 10.5 to 2.5, and vice versa, from 2.5 to 8.5, with a step of 1 pH unit. The preparation approach influenced both the functional and antioxidant properties of the isolates. The PI10.5–2.5 exhibited higher water and oil absorption capacities than PI2.5–8.5, reaching 2.68 g H2O/g sample and 2.36 g oil/g sample, respectively. The emulsion stability of the PI2.5–8.5, evaluated after heating at 80 °C, was either 100% or close to 100% for all pH values studied (from 2 to 10), except for pH 6 where it reached 93.87%. For the PI10.5–2.5, decreases in the emulsion stability were observed at pH 8 (85.71%) and pH 10 (53.15%). In the entire concentration range, the PI10.5–2.5 exhibited a higher scavenging ability on 2,2-diphenyl-1-picryl hydrazyl (DPPH) and hydroxyl radicals than PI2.5–8.5 as evaluated by DPPH and 2-deoxyribose assays, respectively. At the highest concentration studied, 1.0%, the neutralization of DPPH radicals by PI10.5–2 reached half of that exhibited by synthetic antioxidant butylhydroxytoluene (82.65%). At the same concentration, the inhibition of hydroxyl radicals by PI10.5–2 (71.25%) was close to that achieved by mannitol (75.62%), which was used as a positive control. Established antioxidant capacities add value to the protein isolates that can thus be used as both emulsifiers and antioxidants.
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Affiliation(s)
- Radoslav Georgiev
- Department of Biochemistry and Molecular Biology, University of Food Technologies, 26 Maritsa Blvd, 4002 Plovdiv, Bulgaria; (R.G.); (P.I.)
| | - Hristo Kalaydzhiev
- Department of Analytical Chemistry and Physicochemistry, University of Food Technologies, 26 Maritsa Blvd, 4002 Plovdiv, Bulgaria;
| | - Petya Ivanova
- Department of Biochemistry and Molecular Biology, University of Food Technologies, 26 Maritsa Blvd, 4002 Plovdiv, Bulgaria; (R.G.); (P.I.)
| | - Cristina L. M. Silva
- CBQF-Centro de Biotecnologia e Química Fina–Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal;
| | - Vesela I. Chalova
- Department of Biochemistry and Molecular Biology, University of Food Technologies, 26 Maritsa Blvd, 4002 Plovdiv, Bulgaria; (R.G.); (P.I.)
- Correspondence: ; Tel.: +359-32-603-855
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Kubo MTK, Baicu A, Erdogdu F, Poças MF, Silva CLM, Simpson R, Vitali AA, Augusto PED. Thermal processing of food: Challenges, innovations and opportunities. A position paper. Food Reviews International 2021. [DOI: 10.1080/87559129.2021.2012789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Mirian T. K. Kubo
- Enzyme and Cell Engineering Laboratory, Université de Technologie de Compiègne, Umr Cnrs 7025, Compiègne, France
| | - Adina Baicu
- The Global Harmonization Initiative (GHI), Vienna, Austria
| | - Ferruh Erdogdu
- Department of Food Engineering, Ankara University, Ankara, Turkey
| | - Maria Fátima Poças
- Universidade Católica Portuguesa, Cbqf - Centro de Biotecnologia E Química Fina – Laboratório Associado, Escola Superior de Biotecnologia, Porto, Portugal
| | - Cristina L. M. Silva
- Universidade Católica Portuguesa, Cbqf - Centro de Biotecnologia E Química Fina – Laboratório Associado, Escola Superior de Biotecnologia, Porto, Portugal
| | - Ricardo Simpson
- Departamento de Ingeniería Química Y Ambiental, Universidad Técnica Federico Santa María, Valparaíso, Chile
- Centro Regional de Estudios En Alimentos Y Salud (Creas) Conicyt-Regional Gore Valparaíso Project R17A10001, Avenida Universidad 330, Curauma, Valparaíso, Chile
| | | | - Pedro E. D. Augusto
- Department of Agri-food Industry, Food and Nutrition (Lan), Luiz de Queiroz College of Agriculture (Esalq), University of São Paulo (Usp), Piracicaba, Brazil
- Food and Nutrition Research Center (Napan), University of São Paulo (Usp), São Paulo, Brazil
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Tahi AA, Sousa S, Madani K, Silva CLM, Miller FA. Ultrasound and heat treatment effects on Staphylococcus aureus cell viability in orange juice. Ultrason Sonochem 2021; 78:105743. [PMID: 34525437 PMCID: PMC8445896 DOI: 10.1016/j.ultsonch.2021.105743] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [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: 07/13/2021] [Revised: 08/20/2021] [Accepted: 08/29/2021] [Indexed: 05/15/2023]
Abstract
Ultrasounds are being considered an excellent alternative technology in juice preservation. Yet, when combined with heat treatment, the process seems to be further intensified. This work aimed to evaluate and compare the impact of ultrasounds and heat treatments, when applied alone or in combination, on Staphylococcus aureus survival in orange juice. Inoculated commercial pasteurized orange juice was treated at different times at 20, 30, 40, 50 and 60 °C. SEM analyses were applied to identify morphological changes in S. aureus cells appearance. The microbial inactivation data were fitted using two mathematical models, depending on the behaviour observed. Sonication at 20, 30, and 40 °C induced 4.02 ± 0.52, 3.80 ± 0.49 and 4.30 ± 0.74 log cycles reduction of S. aureus after treatments of 90, 60 and 60 min, respectively. The heat treatments at the same temperatures had no impact on S. aureus survival. When 50 and 60 °C were applied, more than 5-log reductions were attained for both thermosonication and heat treatments alone. A synergistic effect was observed between sonication and high temperatures. At 50 °C, the thermosonication reduced the treatment time from 60 to 35 min and the microbial load from 5.14 ± 0.08 to 10.76 ± 0.28 log cycles reduction, compared to heat treatment alone. Results from SEM images showed that cells undergo membrane damage during sonication exposure. This was observed by collapsed cells, cell disruption, and holes in the cell's membrane. Thermosonication proved to be a viable alternative to thermal pasteurization of orange juice since milder treatments can be safely applied, improving the final product quality.
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Affiliation(s)
- Akila Amir Tahi
- Laboratoire de Biomathématiques, Biophysique, Biochimie, et Scientométrie (L3BS), Faculté des Sciences de la Nature et de la Vie, Université de Bejaia, 06000 Bejaia, Algeria.
| | - Sérgio Sousa
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal.
| | - Khodir Madani
- Centre National de Recherche en Technologie Agro-alimentaire, Université de Bejaia, 06000 Bejaia, Algeria.
| | - Cristina L M Silva
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal.
| | - Fátima A Miller
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal.
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Miller FA, Fundo JF, Garcia E, Silva CLM, Brandão TRS. Effect of Gaseous Ozone Process on Cantaloupe Melon Peel: Assessment of Quality and Antilisterial Indicators. Foods 2021; 10:foods10040727. [PMID: 33808125 PMCID: PMC8066758 DOI: 10.3390/foods10040727] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 03/23/2021] [Accepted: 03/26/2021] [Indexed: 11/16/2022] Open
Abstract
Fruit waste parts, particularly peel, are abundant sources of bioactive compounds. To be included in the formulation of value-added foods, peel needs to be transformed and subjected to a preservation process. Therefore, this study seeks to assess the effect of ozone on the quality and antilisterial indicators of cantaloupe melon peel paste, aiming at obtaining a product with the potential to be used as a food additive. Ozone was bubbled during 30 and 60 min, and some physicochemical characteristics (soluble solids content, pH and colour), bioactive compounds (total phenolics, chlorophylls and vitamin C) and antioxidant activity were analysed. Peel was also inoculated with Listeria innocua, used as a treatment efficiency indicator. The results indicated that, although ozone negatively affected antioxidant activity, it positively influenced all bioactive compounds analysed. An L. innocua reduction of 1.2 log cycle was achieved after ozone exposure. Ozone should be exploited as a promising technology to assure the quality/safety of cantaloupe melon peel. Indeed, if melon peel is conveniently converted into a suitable form that can be used as a food ingredient, this will promote the valorisation of waste materials with the consequent reduction of industrial by-products and new perspectives for market opportunities.
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Gonçalves EM, Abreu M, Pinheiro J, Brandão TRS, Silva CLM. Quality changes of carrots under different frozen storage conditions: A kinetic study. J FOOD PROCESS PRES 2020. [DOI: 10.1111/jfpp.14953] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Elsa M. Gonçalves
- UTI Unidade de Tecnologia e Inovação INIAVInstituto Nacional de Investigação Agrária e Veterinária Oeiras Portugal
- GeoBiotec – Geobiociências, Geoengenharias e GeotecnologiasFaculdade de Ciências e TecnologiaUniversidade Nova de Lisboa Caparica Portugal
| | - Marta Abreu
- UTI Unidade de Tecnologia e Inovação INIAVInstituto Nacional de Investigação Agrária e Veterinária Oeiras Portugal
- LEAF – Linking Landscape, Environment, Agriculture and Food Instituto Superior de AgronomiaUniversidade de Lisboa Lisbon Portugal
| | - Joaquina Pinheiro
- UTI Unidade de Tecnologia e Inovação INIAVInstituto Nacional de Investigação Agrária e Veterinária Oeiras Portugal
- MARE – Marine and Environmental Sciences Centre, ESTM, Polytechnic Institute of Leiria Peniche Portugal
| | - Teresa R. S. Brandão
- CBQF – Centro de Biotecnologia e Química Fina – Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa Porto Portugal
| | - Cristina L. M. Silva
- CBQF – Centro de Biotecnologia e Química Fina – Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa Porto Portugal
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Ramos B, Brandão TRS, Teixeira P, Silva CLM. Biopreservation approaches to reduce Listeria monocytogenes in fresh vegetables. Food Microbiol 2020; 85:103282. [PMID: 31500713 DOI: 10.1016/j.fm.2019.103282] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [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: 01/15/2019] [Revised: 07/21/2019] [Accepted: 07/26/2019] [Indexed: 12/21/2022]
Abstract
Two biopreservation approaches for fresh lettuce, rocket salad, parsley and spinach were studied. The potential of Pediococcus pentosaceus DT016, as a protective culture, to suppress Listeria monocytogenes in vegetables during storage was evaluated. The pathogen numbers in the vegetables inoculated with P. pentosaceus DT016 were significantly (p < 0.01) lower throughout the storage period and, at the last storage day, a minimum difference of 1.4 log CFU/g was reported when compared with the vegetables without the protective culture. Moreover, by using two levels of L. monocytogenes (about 6 and 4 log CFU/g), it was observed that the antagonist effect of P. pentosaceus was higher for the lower pathogen numbers. The second approach evaluated a pediocin DT016 solution to inactivate and control L. monocytogenes proliferation. The pathogen load was studied after washing with: water, chlorine and the pediocin solution and along storage at 4 °C. Comparing the various washing solutions, the vegetables washed with pediocin presented significantly (p < 0.01) lower pathogen numbers throughout storage, by a minimum of 3.2 and 2.7 log CFU/g, than in vegetables washed with water and chlorine, respectively. The proposed methodologies are promising alternatives to maintain the safety of fresh vegetables during extended storage at refrigeration temperature.
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Affiliation(s)
- Bárbara Ramos
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal
| | - Teresa R S Brandão
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal
| | - Paula Teixeira
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal
| | - Cristina L M Silva
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal.
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Sroy S, Fundo JF, Miller FA, Brandão TRS, Silva CLM. Impact of ozone processing on microbiological, physicochemical, and bioactive characteristics of refrigerated stored
Cantaloupe
melon juice. J FOOD PROCESS PRES 2019. [DOI: 10.1111/jfpp.14276] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Sengly Sroy
- Centro de Biotecnologia e Química Fina (CBQF) Laboratório Associado Escola Superior de Biotecnologia Universidade Católica Portuguesa Porto Portugal
| | - Joana F. Fundo
- Centro de Biotecnologia e Química Fina (CBQF) Laboratório Associado Escola Superior de Biotecnologia Universidade Católica Portuguesa Porto Portugal
| | - Fátima A. Miller
- Centro de Biotecnologia e Química Fina (CBQF) Laboratório Associado Escola Superior de Biotecnologia Universidade Católica Portuguesa Porto Portugal
| | - Teresa R. S. Brandão
- Centro de Biotecnologia e Química Fina (CBQF) Laboratório Associado Escola Superior de Biotecnologia Universidade Católica Portuguesa Porto Portugal
| | - Cristina L. M. Silva
- Centro de Biotecnologia e Química Fina (CBQF) Laboratório Associado Escola Superior de Biotecnologia Universidade Católica Portuguesa Porto Portugal
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17
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Kalaydzhiev H, Gandova VD, Ivanova P, Brandão TRS, Dessev TT, Silva CLM, Chalova VI. Stability of sunflower and rapeseed oil-in-water emulsions supplemented with ethanol-treated rapeseed meal protein isolate. J Food Sci Technol 2019; 56:3090-3098. [PMID: 31205363 PMCID: PMC6542923 DOI: 10.1007/s13197-019-03806-6] [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] [Revised: 04/09/2019] [Accepted: 04/30/2019] [Indexed: 11/24/2022]
Abstract
A protein isolate (ERPI) was prepared from ethanol-treated rapeseed meal and used as a stabilizing agent in sunflower and rapeseed oil-in-water emulsions. The aim of the current study was to explore the influence of protein and oil concentrations on initial stability of sunflower and rapeseed oil-in-water emulsions by evaluating Gibbs free energy (ΔG) and particle size distribution. The 7-day dynamics of emulsion stability was investigated by turbidity measurement as well. A 32 factorial design was applied to assess the significance of oil (5%, 10% and 15% w/w) and ERPI protein (0.25%, 0.5% and 1.0% w/w) addition on stability of the emulsions. The results demonstrated that the increase of oil concentrations from 5 to 15% positively influenced the initial stability of sunflower and rapeseed oil-in-water emulsions. In both oil types, ERPI protein supplementation at all levels resulted in significant differences in the stability of 5% and 10% oil emulsions but did not alter the initial stability of the emulsions prepared with either 15% sunflower or rapeseed oil. With a few exceptions, there was a good agreement between Gibbs free energy data and microstructural profiles of the emulsions. Overall, emulsions with all sunflower oil concentrations and 1.0% ERPI protein exhibited better initial and a 7-day stability dynamics compared to all rapeseed oil-based emulsions. The study demonstrated the potential of ethanol-treated rapeseed meal protein isolate to serve as an emulsifying agent in sunflower and rapeseed oil containing emulsions.
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Affiliation(s)
- Hristo Kalaydzhiev
- Department of Biochemistry and Molecular Biology, University of Food Technologies, 26 Maritsa Blvd., 4002 Plovdiv, Bulgaria
| | - Vanya D. Gandova
- Department of Analytical and Physical Chemistry, University of Food Technologies, 26 Maritsa Blvd., 4002 Plovdiv, Bulgaria
| | - Petya Ivanova
- Department of Biochemistry and Molecular Biology, University of Food Technologies, 26 Maritsa Blvd., 4002 Plovdiv, Bulgaria
| | - Teresa R. S. Brandão
- CBQF - Centro de Biotecnologia e Química Fina – Laboratório Associado, Escola Superior de Biotecnologia, Rua Arquiteto Lobão Vital, 172, 4200-374 Porto, Portugal
| | - Tzvetelin T. Dessev
- Department of Technology of Cereal and Bakery Products, University of Food Technologies, 26 Maritsa Blvd., 4002 Plovdiv, Bulgaria
| | - Cristina L. M. Silva
- CBQF - Centro de Biotecnologia e Química Fina – Laboratório Associado, Escola Superior de Biotecnologia, Rua Arquiteto Lobão Vital, 172, 4200-374 Porto, Portugal
| | - Vesela I. Chalova
- Department of Biochemistry and Molecular Biology, University of Food Technologies, 26 Maritsa Blvd., 4002 Plovdiv, Bulgaria
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Ivanova P, Kalaydzhiev H, Dessev TT, Silva CLM, Rustad T, Chalova VI. Foaming properties of acid-soluble protein-rich ingredient obtained from industrial rapeseed meal. J Food Sci Technol 2018; 55:3792-3798. [PMID: 30150839 DOI: 10.1007/s13197-018-3311-y] [Citation(s) in RCA: 8] [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] [Subscribe] [Scholar Register] [Revised: 06/20/2018] [Accepted: 06/21/2018] [Indexed: 10/28/2022]
Abstract
The use of the rapeseed meal as a source for preparation of protein-rich ingredients for the food industry is an alternative to the current limited application as a feed additive. The aim of this study was to evaluate foaming properties of an acid-soluble protein-rich ingredient (ASP) obtained from industrial rapeseed meal as a co-product of a protein isolate. Foam capacity and stability over a period of 60 min were evaluated by using volumetric and image analyzing methods. The influence of NaCl at two boundary concentrations (0.03 and 0.25 M) was studied over a pH range from 2 to 10. The ASP exhibited high foamability (> 90%), not influenced by pH or salt addition. In contrast, foam stability, measured over a 60 min period, was pH and NaCl dependent. By the end of the observation period, the addition of 0.25 M NaCl reduced the foam volume by more than 70% at all pH values. After 30 min at pH values 4, 6 and 8, which are the most common for food products, the foams without NaCl retained 51, 38 and 41% of the initial foam volume, respectively. The results were in agreement with image analysis observations where microstructure of the foams with NaCl was more heterogeneous than that of the foams without salt addition. The high foamability and relatively high foam stability at pH from 4 to 8 without NaCl addition shows that ASP could be a potential alternative to plant proteins currently used as foaming agents in the food industry.
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Affiliation(s)
- Petya Ivanova
- 1Department of Biochemistry and Molecular Biology, University of Food Technologies, 26 Maritsa Blvd, 4002 Plovdiv, Bulgaria
| | - Hristo Kalaydzhiev
- 1Department of Biochemistry and Molecular Biology, University of Food Technologies, 26 Maritsa Blvd, 4002 Plovdiv, Bulgaria
| | - Tzvetelin T Dessev
- 2Department of Technology of Cereal and Bakery Products, University of Food Technologies, 26 Maritsa Blvd, 4002 Plovdiv, Bulgaria
| | - Cristina L M Silva
- 3Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Rua Arquiteto Lobão Vital 172, 4200-374 Porto, Portugal
| | - Turid Rustad
- 4Department of Biotechnology and Food Science, Norwegian University of Science and Technology, 7491 Trondheim, Norway
| | - Vesela I Chalova
- 1Department of Biochemistry and Molecular Biology, University of Food Technologies, 26 Maritsa Blvd, 4002 Plovdiv, Bulgaria
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Ek P, Araújo AC, Oliveira SM, Ramos IN, Brandão TRS, Silva CLM. Assessment of nutritional quality and color parameters of convective dried watercress (
Nasturtium officinale
). J FOOD PROCESS PRES 2018. [DOI: 10.1111/jfpp.13459] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- Pichmony Ek
- Universidade Católica Portuguesa, CBQF ‐ Centro de Biotecnologia e Química Fina ‐ Laboratório AssociadoEscola Superior de Biotecnologia, Rua Arquiteto Lobão Vital, 172 4200‐374 Porto Portugal
- Faculté de PharmacieUniversité de MontpellierMontpellier France
| | - Ana C. Araújo
- Universidade Católica Portuguesa, CBQF ‐ Centro de Biotecnologia e Química Fina ‐ Laboratório AssociadoEscola Superior de Biotecnologia, Rua Arquiteto Lobão Vital, 172 4200‐374 Porto Portugal
| | - Sara M. Oliveira
- Universidade Católica Portuguesa, CBQF ‐ Centro de Biotecnologia e Química Fina ‐ Laboratório AssociadoEscola Superior de Biotecnologia, Rua Arquiteto Lobão Vital, 172 4200‐374 Porto Portugal
| | - Inês N. Ramos
- Universidade Católica Portuguesa, CBQF ‐ Centro de Biotecnologia e Química Fina ‐ Laboratório AssociadoEscola Superior de Biotecnologia, Rua Arquiteto Lobão Vital, 172 4200‐374 Porto Portugal
| | - Teresa R. S. Brandão
- Universidade Católica Portuguesa, CBQF ‐ Centro de Biotecnologia e Química Fina ‐ Laboratório AssociadoEscola Superior de Biotecnologia, Rua Arquiteto Lobão Vital, 172 4200‐374 Porto Portugal
| | - Cristina L. M. Silva
- Universidade Católica Portuguesa, CBQF ‐ Centro de Biotecnologia e Química Fina ‐ Laboratório AssociadoEscola Superior de Biotecnologia, Rua Arquiteto Lobão Vital, 172 4200‐374 Porto Portugal
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20
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Noël F, Nascimento-Viana JB, Romeiro LAS, Silva RO, Lemes LFN, Oliveira AS, Giorno TBS, Fernandes PD, Silva CLM. ADME studies and preliminary safety pharmacology of LDT5, a lead compound for the treatment of benign prostatic hyperplasia. ACTA ACUST UNITED AC 2017; 49:e5542. [PMID: 27901175 PMCID: PMC5188857 DOI: 10.1590/1414-431x20165542] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Accepted: 09/26/2016] [Indexed: 02/06/2023]
Abstract
This study aimed to estimate the absorption, distribution, metabolism and excretion
(ADME) properties and safety of LDT5, a lead compound for oral treatment of benign
prostatic hyperplasia that has previously been characterized as a multi-target
antagonist of α1A-, α1D-adrenoceptors and 5-HT1A
receptors. The preclinical characterization of this compound comprised the evaluation
of its in vitro properties, including plasma, microsomal and
hepatocytes stability, cytochrome P450 metabolism and inhibition, plasma protein
binding, and permeability using MDCK-MDR1 cells. De-risking and preliminary safety
pharmacology assays were performed through screening of 44 off-target receptors and
in vivo tests in mice (rota-rod and single dose toxicity). LDT5
is stable in rat and human plasma, human liver microsomes and hepatocytes, but
unstable in rat liver microsomes and hepatocytes (half-life of 11 min). LDT5 is
highly permeable across the MDCK-MDR1 monolayer (Papp ∼32×10-6
cm/s), indicating good intestinal absorption and putative brain penetration. LDT5 is
not extensively protein-bound and is a substrate of human CYP2D6 and CYP2C19 but not
of CYP3A4 (half-life >60 min), and did not significantly influence the activities
of any of the human cytochrome P450 isoforms screened. LDT5 was considered safe
albeit new studies are necessary to rule out putative central adverse effects through
D2, 5-HT1A and 5-HT2B receptors, after chronic
use. This work highlights the drug-likeness properties of LDT5 and supports its
further preclinical development.
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Affiliation(s)
- F Noël
- Laboratório de Farmacologia Bioquímica e Molecular, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
| | - J B Nascimento-Viana
- Laboratório de Farmacologia Bioquímica e Molecular, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
| | - L A S Romeiro
- Departamento de Farmácia, Faculdade de Ciências da Saúde, Universidade de Brasília, Brasília, DF, Brasil
| | - R O Silva
- Departamento de Farmácia, Faculdade de Ciências da Saúde, Universidade de Brasília, Brasília, DF, Brasil.,Laboratório de Desenvolvimento de Estratégias Terapêuticas, Universidade Católica de Brasília, Brasília, DF, Brasil
| | - L F N Lemes
- Laboratório de Desenvolvimento de Estratégias Terapêuticas, Universidade Católica de Brasília, Brasília, DF, Brasil
| | - A S Oliveira
- Departamento de Farmácia, Faculdade de Ciências da Saúde, Universidade de Brasília, Brasília, DF, Brasil.,Laboratório de Desenvolvimento de Estratégias Terapêuticas, Universidade Católica de Brasília, Brasília, DF, Brasil
| | - T B S Giorno
- Laboratório de Farmacologia da Dor e Inflamação, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
| | - P D Fernandes
- Laboratório de Farmacologia da Dor e Inflamação, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
| | - C L M Silva
- Laboratório de Farmacologia Bioquímica e Molecular, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
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21
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Fundo JF, Miller FA, Garcia E, Santos JR, Silva CLM, Brandão TRS. Physicochemical characteristics, bioactive compounds and antioxidant activity in juice, pulp, peel and seeds of Cantaloupe melon. Food Measure 2017. [DOI: 10.1007/s11694-017-9640-0] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Tremarin A, Aragão GMF, Salomão BCM, Brandão TRS, Silva CLM. Modeling the Soluble Solids and Storage Temperature Effects on Byssochlamys fulva Growth in Apple Juices. FOOD BIOPROCESS TECH 2017. [DOI: 10.1007/s11947-016-1854-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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23
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Pinheiro JC, Alegria CSM, Abreu MMMN, Gonçalves EM, Silva CLM. Evaluation of Alternative Preservation Treatments (Water Heat Treatment, Ultrasounds, Thermosonication and UV-C Radiation) to Improve Safety and Quality of Whole Tomato. FOOD BIOPROCESS TECH 2016. [DOI: 10.1007/s11947-016-1679-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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25
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Borges S, Barbosa J, Silva J, Gomes AM, Pintado M, Silva CLM, Morais AMMB, Teixeira P. A feasibility study ofLactobacillus plantarumin fruit powders after processing and storage. Int J Food Sci Technol 2015. [DOI: 10.1111/ijfs.12975] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Sandra Borges
- CBQF-Centro de Biotecnologia e Química Fina - Laboratório Associado; Escola Superior de Biotecnologia; Universidade Católica Portuguesa/Porto; Rua Arquiteto Lobão Vital Apartado 2511 Porto 4202-401 Portugal
| | - Joana Barbosa
- CBQF-Centro de Biotecnologia e Química Fina - Laboratório Associado; Escola Superior de Biotecnologia; Universidade Católica Portuguesa/Porto; Rua Arquiteto Lobão Vital Apartado 2511 Porto 4202-401 Portugal
| | - Joana Silva
- CBQF-Centro de Biotecnologia e Química Fina - Laboratório Associado; Escola Superior de Biotecnologia; Universidade Católica Portuguesa/Porto; Rua Arquiteto Lobão Vital Apartado 2511 Porto 4202-401 Portugal
| | - Ana M. Gomes
- CBQF-Centro de Biotecnologia e Química Fina - Laboratório Associado; Escola Superior de Biotecnologia; Universidade Católica Portuguesa/Porto; Rua Arquiteto Lobão Vital Apartado 2511 Porto 4202-401 Portugal
| | - Manuela Pintado
- CBQF-Centro de Biotecnologia e Química Fina - Laboratório Associado; Escola Superior de Biotecnologia; Universidade Católica Portuguesa/Porto; Rua Arquiteto Lobão Vital Apartado 2511 Porto 4202-401 Portugal
| | - Cristina L. M. Silva
- CBQF-Centro de Biotecnologia e Química Fina - Laboratório Associado; Escola Superior de Biotecnologia; Universidade Católica Portuguesa/Porto; Rua Arquiteto Lobão Vital Apartado 2511 Porto 4202-401 Portugal
| | - Alcina M. M. B. Morais
- CBQF-Centro de Biotecnologia e Química Fina - Laboratório Associado; Escola Superior de Biotecnologia; Universidade Católica Portuguesa/Porto; Rua Arquiteto Lobão Vital Apartado 2511 Porto 4202-401 Portugal
| | - Paula Teixeira
- CBQF-Centro de Biotecnologia e Química Fina - Laboratório Associado; Escola Superior de Biotecnologia; Universidade Católica Portuguesa/Porto; Rua Arquiteto Lobão Vital Apartado 2511 Porto 4202-401 Portugal
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Pinheiro J, Alegria C, Abreu M, Gonçalves EM, Silva CLM. Influence of postharvest ultrasounds treatments on tomato (Solanum lycopersicum, cv. Zinac) quality and microbial load during storage. Ultrason Sonochem 2015; 27:552-559. [PMID: 25922160 DOI: 10.1016/j.ultsonch.2015.04.009] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [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: 08/03/2014] [Revised: 02/03/2015] [Accepted: 04/08/2015] [Indexed: 05/09/2023]
Abstract
Whole tomato fruits were treated at ultrasonic power levels from 10% to 100%, and at a constant frequency of 45 kHz, for different times (1-19 min). A central composite rotatable design (CCRD) was applied to optimise ultrasonic treatments for tomato quality (colour, texture and total phenolic content (TPC)) maintenance. According to response surface analysis, the optimal treatment parameters were 55%_10 min, 80%_15 min and 100%_19 min. At these conditions, and especially at higher power levels, a maximum retention of colour and texture, as well as an increase of TPC and microbial reduction were obtained in comparison with untreated fruits during 15 storage days at 10°C. The ultrasounds treatment was found to be effective in delaying colour development and texture losses, preserving sensorial quality of whole tomato, with increase of TPC and microbial load reduction. Moreover, this postharvest treatment can be used as an alternative for extending fresh fruits shelf-life.
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Affiliation(s)
- Joaquina Pinheiro
- CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa/Porto, Rua Arquiteto Lobão Vital, Apartado 2511, 4202-401 Porto, Portugal
| | - Carla Alegria
- UEISTSA - Unidade Estratégica de Investigação e Serviços de Tecnologia e Segurança Alimentar - Instituto Nacional de Investigação Agrária e Veterinária, Estrada Paço do Lumiar, 22, 1649-038 Lisboa, Portugal
| | - Marta Abreu
- UEISTSA - Unidade Estratégica de Investigação e Serviços de Tecnologia e Segurança Alimentar - Instituto Nacional de Investigação Agrária e Veterinária, Estrada Paço do Lumiar, 22, 1649-038 Lisboa, Portugal
| | - Elsa M Gonçalves
- UEISTSA - Unidade Estratégica de Investigação e Serviços de Tecnologia e Segurança Alimentar - Instituto Nacional de Investigação Agrária e Veterinária, Estrada Paço do Lumiar, 22, 1649-038 Lisboa, Portugal
| | - Cristina L M Silva
- CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa/Porto, Rua Arquiteto Lobão Vital, Apartado 2511, 4202-401 Porto, Portugal.
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27
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Oliveira SM, Brandão TRS, Silva CLM. Influence of Drying Processes and Pretreatments on Nutritional and Bioactive Characteristics of Dried Vegetables: A Review. Food Eng Rev 2015. [DOI: 10.1007/s12393-015-9124-0] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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28
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Fundo JF, Galvis-Sanchez AC, Delgadillo I, Silva CLM, Quintas MAC. The Effect of Polymer/ Plasticiser Ratio in Film Forming Solutions on the Properties of Chitosan Films. FOOD BIOPHYS 2015. [DOI: 10.1007/s11483-015-9394-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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29
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Fundo JF, Quintas MAC, Silva CLM. Molecular Dynamics and Structure in Physical Properties and Stability of Food Systems. Food Eng Rev 2015. [DOI: 10.1007/s12393-015-9109-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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30
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Pinheiro J, Alegria C, Abreu M, Gonçalves EM, Silva CLM. Use of UV-C postharvest treatment for extending fresh whole tomato (Solanum lycopersicum, cv. Zinac) shelf-life. J Food Sci Technol 2014; 52:5066-74. [PMID: 26243927 DOI: 10.1007/s13197-014-1550-0] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 07/03/2014] [Accepted: 09/01/2014] [Indexed: 11/25/2022]
Abstract
The effect of UV-C treatments (0.32, 0.97, 2.56, 4.16 and 4.83 kJ.m(-2) at 254 nm) on the physical-chemical properties [colour, texture, total phenolic content (TPC), weight loss (WL)], and mesophylic counts of whole tomato, was evaluated during 15 days at 10 °C. During storage, the Ctr samples acquired faster red colour than all UV-C samples (higher a* and lower °h values). Comparing texture of Ctr and UV-C samples at 15(th) storage day, an increase of 9 and 8 % on firmness of treated samples at low UV-C intensities (0.32 and 0.97 kJ.m(-2), respectively) was observed. At the end of the storage, Ctr samples showed ca. 4 Log10 of mesophylic load, and the samples treated at 0.97 and 4.83 kJ.m(-2) revealed the lowest microbial load (1.9 and 3.2 Log10, respectively). These results indicate that UV-C radiation, at an appropriate dose, combined with low storage temperature (10 °C) are an effective method to preserve the postharvest life of tomato, without adversely affecting quality parameters.
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Affiliation(s)
- Joaquina Pinheiro
- CBQF-Centro de Biotecnologia e Química Fina-Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa, Rua Dr. António Bernardino Almeida, 4200-072 Porto, Portugal ; UEISTSA-Unidade Estratégica de Investigação e Serviços de Tecnologia e Segurança Alimentar, Instituto Nacional de Investigação Agrária e Veterinária, Estrada Paço do Lumiar, 22, 1649-038 Lisboa, Portugal
| | - Carla Alegria
- UEISTSA-Unidade Estratégica de Investigação e Serviços de Tecnologia e Segurança Alimentar, Instituto Nacional de Investigação Agrária e Veterinária, Estrada Paço do Lumiar, 22, 1649-038 Lisboa, Portugal
| | - Marta Abreu
- UEISTSA-Unidade Estratégica de Investigação e Serviços de Tecnologia e Segurança Alimentar, Instituto Nacional de Investigação Agrária e Veterinária, Estrada Paço do Lumiar, 22, 1649-038 Lisboa, Portugal
| | - Elsa M Gonçalves
- UEISTSA-Unidade Estratégica de Investigação e Serviços de Tecnologia e Segurança Alimentar, Instituto Nacional de Investigação Agrária e Veterinária, Estrada Paço do Lumiar, 22, 1649-038 Lisboa, Portugal
| | - Cristina L M Silva
- CBQF-Centro de Biotecnologia e Química Fina-Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa, Rua Dr. António Bernardino Almeida, 4200-072 Porto, Portugal
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Abstract
Ethylene oxide gas is commonly used to sterilize medical devices, and concerns about using this agent on biological systems are well-established. Medical devices sterilized by ethylene oxide must be properly aerated to remove residual gas and by-products. In this work, kinetics of ethylene oxide desorption from different sterilized materials were studied in a range of aeration temperatures. The experimental data were well-described by a Fickian diffusion mass transfer behavior, and diffusivities were estimated for two textile and two polymeric materials within the temperature range of 1.5 to 59.0 degrees C. The results will allow predictions of ethylene oxide desorption, which is a key step for the design of sterilization/aeration processes, contributing to an efficient removal of residual ethylene oxide content.
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Affiliation(s)
- Gisela C Mendes
- Universidade Católica Portuguesa, CBQF/Centro de Biotecnologia e Química Fina, Escola Superior de Biotecnologia, R. Dr. António Bernardino de Almeida, 4200-072 Porto, Portugal
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Guethe LM, Pelegrini-da-Silva A, Borelli KG, Juliano MA, Pelosi GG, Pesquero JB, Silva CLM, Corrêa FMA, Murad F, Prado WA, Martins AR. Angiotensin (5-8) modulates nociception at the rat periaqueductal gray via the NO-sGC pathway and an endogenous opioid. Neuroscience 2012; 231:315-27. [PMID: 23219939 DOI: 10.1016/j.neuroscience.2012.11.048] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2012] [Revised: 11/18/2012] [Accepted: 11/21/2012] [Indexed: 01/05/2023]
Abstract
Angiotensins (Angs) modulate blood pressure, hydro-electrolyte composition, and antinociception. Although Ang (5-8) has generally been considered to be inactive, we show here that Ang (5-8) was the smallest Ang to elicit dose-dependent responses and receptor-mediated antinociception in the rat ventrolateral periaqueductal gray matter (vlPAG). Ang (5-8) antinociception seems to be selective, because it did not alter blood pressure or act on vascular or intestinal smooth muscle cells. The non-selective Ang-receptor (Ang-R) antagonist saralasin blocked Ang (5-8) antinociception, but selective antagonists of Ang-R types I, II, IV, and Mas did not, suggesting that Ang (5-8) may act via an unknown receptor. Endopeptidase EP 24.11 and amastatin-sensitive aminopeptidase from the vlPAG catalyzed the synthesis (from Ang II or Ang III) and inactivation of Ang (5-8), respectively. Selective inhibitors of neuronal-nitric oxide (NO) synthase, soluble guanylyl cyclase (sGC) and a non-selective opioid receptor (opioid-R) inhibitor blocked Ang (5-8)-induced antinociception. In conclusion, Ang (5-8) is a new member of the Ang family that selectively and strongly modulates antinociception via NO-sGC and endogenous opioid in the vlPAG.
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Affiliation(s)
- L M Guethe
- Department of Psychology, FFCLRP University of São Paulo, Ribeirão Preto 14049-901, SP, Brazil
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Alexandre EMC, Santos-Pedro DM, Brandão TRS, Silva CLM. Study on Thermosonication and Ultraviolet Radiation Processes as an Alternative to Blanching for Some Fruits and Vegetables. FOOD BIOPROCESS TECH 2011. [DOI: 10.1007/s11947-011-0540-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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35
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Miller FA, Ramos B, Brandão TRS, Teixeira P, Silva CLM. Comparison of recovery methods for the enumeration of injured Listeria innocua cells under isothermal and non-isothermal treatments. Food Microbiol 2010; 27:1112-20. [PMID: 20832692 DOI: 10.1016/j.fm.2010.07.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2009] [Revised: 07/15/2010] [Accepted: 07/20/2010] [Indexed: 11/18/2022]
Abstract
This study compares the feature of different media with the combination of selective with non-selective media in a TAL method for recovery of Listeria innocua cells exposed to thermal treatments. Experiments were conducted in broth at constant temperature (52.5 and 65.0 °C) and pH (4.5 and 7.5) conditions, using NaCl or glycerol to adjust water activity to 0.95. Four different media were used in bacterial cell enumeration: (i) a non-selective medium - TSAYE, (ii) two selective media - TSAYE + 5%NaCl and Palcam Agar and (iii) TAL medium (consisting of a layer of Palcam Agar overlaid with one of TSAYE). Two food products were used as case studies aiming at comparison of results obtained on selective and TAL media enumeration. Parsley samples were inoculated with L. innocua and subjected to posterior thermal treatments both under isothermal (52.5, 60.0 and 65.0 °C) and non-isothermal (heating rate of 1.8 °C/min from 20.0 to 65.0 °C) conditions. The recovery capability of TAL method was also studied when a pre-cooked frozen food (i.e. meat pockets) was fried (oil temperature of ∼180 °C). TAL method proved to be better than Palcam Agar in terms of capability to recover injured cells and was effective in L. innocua enumeration when non-sterile samples were analysed.
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Affiliation(s)
- Fátima A Miller
- Universidade Católica Portuguesa, Escola Superior de Biotecnologia, CBQF-Centro de Biotecnologia e Química Fina, Porto, Portugal
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Miller FA, Ramos B, Gil MM, Brandão TRS, Teixeira P, Silva CLM. Influence of pH, type of acid and recovery media on the thermal inactivation of Listeria innocua. Int J Food Microbiol 2009; 133:121-8. [PMID: 19481827 DOI: 10.1016/j.ijfoodmicro.2009.05.007] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2009] [Revised: 05/04/2009] [Accepted: 05/05/2009] [Indexed: 11/20/2022]
Abstract
Acidification of foods with organic acids, either by fermentation or by intentional addition, is an important and common mechanism for controlling foodborne pathogens in a diversity of food products. The objective of this work was to study thermal inactivation of Listeria innocua, an acid tolerant microorganism, at 52.5, 60.0 and 65.0 degrees C, at different pH values (4.5, 6.0 and 7.5), using three types of acid (lactic, acetic and hydrochloric) and three different plating media (Tryptic Soy Agar with 0.6% yeast extract-TSAYE; TSAYE plus 5% NaCl-TSAYE+5%NaCl; and Palcam Agar with selective supplement-Palcam Agar), according to a 3(4) factorial experimental design. Survival data experimentally obtained were fitted with a Gompertz-inspired model and kinetic parameters (shoulder, maximum inactivation rate-k(max), and tail) were estimated for all conditions considered. The influence of temperature, pH, type of acid and enumeration media on kinetic parameters was assessed. Results showed that, with the exception of the type of acid, all the remaining factors and their combinations significantly affected the shoulder period and k(max). In relation to tail, temperature and recovery media were the affectable factors. It was concluded that the survival of this bacteria is higher when combining low temperature with neutral pH, and when TSAYE is the enumeration medium. Bigelow-inspired models were successfully developed and describe accurately the temperature and pH effects on the kinetic parameters.
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Affiliation(s)
- Fátima A Miller
- CBQF, Universidade Católica Portuguesa, Rua Dr. António Bernardino de Almeida, Porto, Portugal
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Gonçalves EM, Pinheiro J, Alegria C, Abreu M, Brandão TRS, Silva CLM. Degradation kinetics of peroxidase enzyme, phenolic content, and physical and sensorial characteristics in broccoli (Brassica oleracea L. ssp. Italica) during blanching. J Agric Food Chem 2009; 57:5370-5375. [PMID: 19441787 DOI: 10.1021/jf900314x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The effects of water blanching treatment on peroxidase inactivation, total phenolic content, color parameters [-a*/b* and hue (h degrees*)], texture (maximum shear force), and sensory attributes (color and texture, evaluated by a trained panel) of broccoli (Brassica oleracea L. ssp. Italica) were studied at five temperatures (70, 75, 80, 85, and 90 degrees C). Experimental results showed that all studied broccoli quality parameters suffered significative changes due to blanching treatments. The vegetal total phenolic content showed a marked decline. Degradation on objective color and texture measurements and alterations in sensorial attributes were detected. Correlations between sensory and instrumental measurements have been found. Under the conditions 70 degrees C and 6.5 min or 90 degrees C and 0.4 min, 90% of the initial peroxidase activity was reduced. At these conditions, no significant alterations were detected by panelists, and a small amount of phenolic content was lost (ca. 16 and 10%, respectively). The peroxidase inactivation and phenolic content degradation were found to follow first-order reaction models. The zero-order reaction model showed a good fit to the broccoli color (-a*/b* and h degrees*), texture, and sensory parameters changes. The temperature effect was well-described by the Arrhenius law.
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Affiliation(s)
- Elsa M Gonçalves
- Departamento de Tecnologia das Industrias Alimentares, Instituto Nacional de Engenharia, Tecnologia e Inovacao, Estrada do Paco do Lumiar, Lisboa, Portugal
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38
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Cruz RMS, Vieira MC, Fonseca SC, Silva CLM. Impact of Thermal Blanching and Thermosonication Treatments on Watercress (Nasturtium officinale) Quality: Thermosonication Process Optimisation and Microstructure Evaluation. FOOD BIOPROCESS TECH 2009. [DOI: 10.1007/s11947-009-0220-0] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Araujo FP, Quintas LEM, Noël F, Silva CLM. Schistosoma mansoni infection enhances host portal vein contraction: role of potassium channels and p38 MAP kinase. Microbes Infect 2007; 9:1020-5. [PMID: 17544802 DOI: 10.1016/j.micinf.2007.04.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2007] [Revised: 03/16/2007] [Accepted: 04/11/2007] [Indexed: 11/17/2022]
Abstract
Murine Schistosoma mansoni infection is related to an increased contraction of portal vein in response to 5-hydroxytryptamine (5-HT). The present study addressed a putative alteration of ion channels and enzymes involved in vascular contraction. In control group, either inhibition of K+ channels sensitive to ATP (K(ATP)) or Ca2+ (BK(Ca)) increased 5-HT-induced contraction, but the same did not occur in infected mice. On the other hand, inhibition of p38 MAP kinase markedly decreased the vascular contraction to 5-HT in the infected mice with minor effects in the control group. Accordingly, we observed a higher density of phospho-p38 MAP kinase, that refers to the fully active state of the enzyme, in portal veins from infected mice as compared to control animals. These results suggest that the reduced function of K(ATP) and BK(Ca) channels along with an increased contribution of p38 MAP kinase contribute to the increased contraction of portal veins to 5-HT observed in murine schistosomiasis.
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Affiliation(s)
- F P Araujo
- Departamento de Farmacologia Básica & Clínica, Universidade Federal do Rio de Janeiro, CCS, sl. J01-17, Cidade Universitária, Rio de Janeiro, RJ 21941-590, Brazil
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40
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Silva CLM, Tamura EK, Macedo SMD, Cecon E, Bueno-Alves L, Farsky SHP, Ferreira ZS, Markus RP. Melatonin inhibits nitric oxide production by microvascular endothelial cells in vivo and in vitro. Br J Pharmacol 2007; 151:195-205. [PMID: 17375079 PMCID: PMC2013957 DOI: 10.1038/sj.bjp.0707225] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [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: 01/05/2023] Open
Abstract
BACKGROUND AND PURPOSE We have previously shown that melatonin inhibits bradykinin-induced NO production by endothelial cells in vitro. The purpose of this investigation was to extend this observation to an in vivo condition and to explore the mechanism of action of melatonin. EXPERIMENTAL APPROACH RT-PCR assays were performed with rat cultured endothelial cells. The putative effect of melatonin upon arteriolar tone was investigated by intravital microscopy while NO production by endothelial cells in vitro was assayed by fluorimetry, and intracellular Ca(2+) measurements were assayed by confocal microscopy. KEY RESULTS No expression of the mRNA for the melatonin synthesizing enzymes, arylalkylamine N-acetyltransferase and hydroxyindole-O-methyltransferase, or for the melatonin MT(2) receptor was detected in microvascular endothelial cells. Melatonin fully inhibited L-NAME-sensitive bradykinin-induced vasodilation and also inhibited NO production induced by histamine, carbachol and 2-methylthio ATP, but did not inhibit NO production induced by ATP or alpha, beta-methylene ATP. None of its inhibitory effects was prevented by the melatonin receptor antagonist, luzindole. In nominally Ca(2+)-free solution, melatonin reduced intracellular Ca(2+) mobilization induced by bradykinin (40%) and 2-methylthio ATP (62%) but not Ca(2+) mobilization induced by ATP. CONCLUSIONS AND IMPLICATIONS We have confirmed that melatonin inhibited NO production both in vivo and in vitro. In addition, the melatonin effect was selective for some G protein-coupled receptors and most probably reflects an inhibition of Ca(2+) mobilization from intracellular stores.
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Affiliation(s)
- C L M Silva
- Departamento de Fisiologia, Instituto de Biociências, Universidade de São Paulo São Paulo, Brazil
| | - E K Tamura
- Departamento de Fisiologia, Instituto de Biociências, Universidade de São Paulo São Paulo, Brazil
| | - S M D Macedo
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo São Paulo, Brazil
| | - E Cecon
- Departamento de Fisiologia, Instituto de Biociências, Universidade de São Paulo São Paulo, Brazil
| | - L Bueno-Alves
- Departamento de Fisiologia, Instituto de Biociências, Universidade de São Paulo São Paulo, Brazil
| | - S H P Farsky
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo São Paulo, Brazil
| | - Z S Ferreira
- Departamento de Fisiologia, Instituto de Biociências, Universidade de São Paulo São Paulo, Brazil
| | - R P Markus
- Departamento de Fisiologia, Instituto de Biociências, Universidade de São Paulo São Paulo, Brazil
- Author for correspondence:
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Quintas M, Brandão TRS, Silva CLM, Cunha RL. Modelling Viscosity Temperature Dependence of Supercooled Sucrose SolutionsThe Random-Walk Approach. J Phys Chem B 2007; 111:3192-6. [PMID: 17388465 DOI: 10.1021/jp068345c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [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: 11/29/2022]
Abstract
Sucrose and its supersaturated or supercooled solutions are of the utmost importance in areas as different as food and pharmaceutical industries or cryopreservation of biological systems. In the supercooled "state", such amorphous solutions are fragile systems, presenting extremely high viscosity with decreased mobility of molecules, impairing experimental determinations at low temperatures (below critical temperature, Tc). This work proposes the random walk (RW) approach to study relaxation behavior in the supercooled melt, using only viscosity data at temperatures above Tc. For comparison purposes, the Vogel-Fulcher-Tamman (VFT) model was fitted to th data. The random walk approach is based on the distribution of molecular energies, thus having a theoretical support not found in the VFT model. The RW estimated parameters can be correlated with system characteristics, showing their dependence on water content or sucrose concentration. RW and VFT model description was evaluated from the mathematical and physical points of view, but the random walk model led to more consistent regression results and parameter estimates with improved precision.
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Affiliation(s)
- Mafalda Quintas
- Laboratório de Optimização de Processos Alimentares, Escola Superior de Biotecnologia, Universidade Católica Portuguesa, R. Dr. António Bernardino de Almeida, 4200-072 Porto, Portugal
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42
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Abstract
Listeria innocua was subjected to thermal inactivation and the extent of heat-injured cells was quantified. Cultures were heated in liquid medium for different times, using temperatures in the range of 52.5 to 65.0 degrees C, and plated on Tryptic Soy Agar with 0.6% yeast extract (TSAYE) used as non-selective medium and on TSAYE plus 5% NaCl (TSAYE+NaCl) and Palcam agar with selective supplement (Palcam agar) as selective media. The difference observed in counts in non-selective and in selective media gave an indication of cell injury during the heat treatment. D- and z- values were calculated for all conditions considered. For each temperature, D-values obtained using non-selective recovery procedures were higher than the ones obtained using the two selective media. When comparing the selective media, it can be concluded that Palcam agar allowed recovery and growth of thermally injured cells and so it was less inhibitor than TSAYE+NaCl. Another important result was the influence of temperature on the degree of cellular injury. As temperature increases, the degree of heat-injured cells also increases, and consequently concern has to be taken with the temperature and the counting medium used in food processing studies. The results of this work clearly demonstrated that selective media used for Listeria monocytogenes enumeration/detection might not be suitable for the recovery of heat-injured cells, which can dangerously underestimate the presence of this foodborne pathogen.
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Affiliation(s)
- Fátima A Miller
- Universidade Católica Portuguesa, Escola Superior de Biotecnologia, Rua Dr. António Bernardino de Almeida, 4200-072 Porto, Portugal
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Silva CLM, Gontijo LS, Noël F. Noradrenaline-induced contraction of mice aorta is enhanced in schistosomiasis. Vascul Pharmacol 2006; 46:122-8. [PMID: 17049461 DOI: 10.1016/j.vph.2006.08.414] [Citation(s) in RCA: 5] [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] [Received: 03/13/2006] [Revised: 06/05/2006] [Accepted: 08/30/2006] [Indexed: 02/07/2023]
Abstract
Schistosomiasis, an intravascular parasitic disease caused by Schistosoma mansoni, is related to alterations of murine vascular reactivity in the mesenteric bed, characterized by an impairment of the l-arginine/NO pathway and an increased potency of 5-hydroxytryptamine. The current study was performed to test the hypothesis that a similar alteration of reactivity also occurs in the aorta and to identify the mechanism behind such an increase. We found that aorta from mice infected with male S. mansoni exhibited an enhanced contraction in response to noradrenaline and 100 mM KCl. The inhibition of nitric oxide synthase increased aortic maximal contraction in response to noradrenaline in both groups, but the effect was less pronounced in infected mice than in control mice. Endothelium-dependent relaxation induced by acetylcholine was also smaller in infected mice compared to control mice, while endothelial-independent relaxation induced by sodium nitroprusside and forskolin was similar in both groups. The inhibition of voltage-dependent L-type Ca(2+) channels reduced the maximal contraction in response to noradrenaline more effectively in infected than in control mice. Conversely the inhibition of K(ATP) channels had a smaller effect in the infected group. As a conclusion, our data indicate that schistosomiasis also alters murine vascular reactivity outside the mesenteric bed, due to a partial impairment of NO signaling, a reduced contribution of K(ATP) channels and an increased Ca(2+) influx through L-type Ca(2+) channels.
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Affiliation(s)
- C L M Silva
- Departamento de Farmacologia Básica e Clínica, ICB, Universidade Federal do Rio de Janeiro, Brazil
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44
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Mendonça-Silva DL, Novozhilova E, Cobbett PJR, Silva CLM, Noël F, Totten MIJ, Maule AG, Day TA. Role of calcium influx through voltage-operated calcium channels and of calcium mobilization in the physiology of Schistosoma mansoni muscle contractions. Parasitology 2006; 133:67-74. [PMID: 16566851 DOI: 10.1017/s0031182006000023] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2005] [Revised: 12/22/2005] [Accepted: 12/23/2005] [Indexed: 11/07/2022]
Abstract
We tested the hypothesis that voltage-operated Ca2+ channels mediate an extracellular Ca2+ influx in muscle fibres from the human parasite Schistosoma mansoni and, along with Ca2+ mobilization from the sarcoplasmic reticulum, contribute to muscle contraction. Indeed, whole-cell voltage clamp revealed voltage-gated inward currents carried by divalent ions with a peak current elicited by steps to +20 mV (from a holding potential of -70 mV). Depolarization of the fibres by elevated extracellular K+ elicited contractions that were completely dependent on extracellular Ca2+ and inhibited by nicardipine (half inhibition at 4.1 microM). However these contractions were not very sensitive to other classical blockers of voltage-gated Ca2+ channels, indicating that the schistosome muscle channels have an atypical pharmacology when compared to their mammalian counterparts. Futhermore, the contraction induced by 5 mM caffeine was inhibited after depletion of the sarcoplasmic reticulum either with thapsigargin (10 microM) or ryanodine (10 microM). These data suggest that voltage-operated Ca2+ channels do contribute to S. mansoni contraction as does the mobilization of stored Ca2+, despite the small volume of sarcoplasmic reticulum in schistosome smooth muscles.
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Affiliation(s)
- D L Mendonça-Silva
- Departamento de Farmacologia Básica e Clínica, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Brazil
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45
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Silva FVM, Martins RC, Silva CLM. Design and optimization of hot-filling pasteurization conditions: Cupuaçu (Theobroma grandiflorum) fruit pulp case study. Biotechnol Prog 2003; 19:1261-8. [PMID: 12892489 DOI: 10.1021/bp030013r] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [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: 11/28/2022]
Abstract
Cupuaçu (Theobroma grandiflorum) is an Amazonian tropical fruit with a great economic potential. Pasteurization, by a hot-filling technique, was suggested for the preservation of this fruit pulp at room temperature. The process was implemented with local communities in Brazil. The process was modeled, and a computer program was written in Turbo Pascal. The relative importance among the pasteurization process variables (initial product temperature, heating rate, holding temperature and time, container volume and shape, cooling medium type and temperature) on the microbial target and quality was investigated, by performing simulations according to a screening factorial design. Afterward, simulations of the different processing conditions were carried out. The holding temperature (T(F)) and time (t(hold)) affected pasteurization value (P), and the container volume (V) influenced largely the quality parameters. The process was optimized for retail (1 L) and industrial (100 L) size containers, by maximizing volume average quality in terms of color lightness and sensory "fresh notes" and minimizing volume average total color difference and sensory "cooked notes". Equivalent processes were designed and simulated (P(91)( degrees )(C) = 4.6 min on Alicyclobacillus acidoterrestris spores) and final quality (color, flavor, and aroma attributes) was evaluated. Color was slightly affected by the pasteurization processes, and few differences were observed between the six equivalent treatments designed (T(F) between 80 and 97 degrees C). T(F) >/= 91 degrees C minimized "cooked notes" and maximized "fresh notes" of cupuaçu pulp aroma and flavor for 1 L container. Concerning the 100 L size, the "cooked notes" development can be minimized with T(F) >/= 91 degrees C, but overall the quality was greatly degraded as a result of the long cooling times. A more efficient method to speed up the cooling phase was recommended, especially for the industrial size of containers.
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Affiliation(s)
- Filipa V M Silva
- Escola Superior de Biotecnologia, Universidade Católica Portuguesa, Rua Dr. António Bernardino de Almeida, 4200-072 Porto, Portugal.
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Silva CLM, Lenzi HL, Silva VFM, Paulo FO, Noël F. Cellular mechanisms involved in the increased contraction of portal veins from Schistosoma mansoni-infected mice. Parasitol Res 2003; 89:16-22. [PMID: 12474038 DOI: 10.1007/s00436-002-0711-7] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2002] [Accepted: 06/21/2002] [Indexed: 11/29/2022]
Abstract
We previously reported that portal veins from mice infected with male Schistosoma mansoni exhibited an increased reactivity to 5-hydroxytryptamine (5-HT). Here, we extended our observations to mice infected by both male and female worms and we further investigated another constrictor agent and the mechanism(s) responsible for the enhanced maximal contraction ( E(max)). Bisexual infection increased the E(max) of 5-HT (from 0.66+/-0.06 mN.s to 1.56+/-0.38 mN.s), in a similar way to the unisexual (male) infection. Infection with male worms increased portal vein reactivity to acetylcholine, as revealed by a higher E(max) (1.03+/-0.2 mN.s) in relation to non-infected control animals ( E(max)= 0.54+/-0.08 mN.s). Sarcoplasmic/endoplasmic reticulum Ca(2+)-ATPase (SERCA) inhibition with 100 nM thapsigargin reduced the E(max) of 5-HT by 35% in both tissues, discharging a deficiency of SERCA pump in infected animals. In contrast, the number of voltage-dependent Ca(2+) channels (L-type) was higher in portal veins from infected than non-infected control mice. Inhibition of Ca(2+)-activated chloride channels (Cl(Ca)) with 10 micro M niflumic acid reduced the E(max) of 5-HT in portal veins more from infected than non-infected animals (remaining tension = 60.9+/-2.2% and 70.4+/-2.3%, respectively). Histopathological analysis revealed an increased content of collagen and elastin in portal veins from male S. mansoni-infected mice, compatible with an increased intraluminal pressure. In conclusion, male S. mansoni altered portal vein physiology, increasing the E(max) of two vasoconstrictors, possibly by increasing membrane depolarisation through a more effective opening of Cl(Ca) channels, with calcium entering through L-type Ca(2+) channels.
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Affiliation(s)
- C L M Silva
- Laboratório de Farmacologia Bioquímica e Molecular, Departamento de Farmacologia Básica e Clínica, ICB, Universidade Federal do Rio de Janeiro, RJ, Brazil
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Vieira MC, Teixeira AA, Silva FM, Gaspar N, Silva CLM. Alicyclobacillus acidoterrestris spores as a target for Cupuaçu (Theobroma grandiflorum) nectar thermal processing: kinetic parameters and experimental methods. Int J Food Microbiol 2002; 77:71-81. [PMID: 12076040 DOI: 10.1016/s0168-1605(02)00043-0] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.0] [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: 10/16/2022]
Abstract
The kinetic parameters of thermal inactivation of a spore former, Alicyclobacillus acidoterrestris, in a tropical fruit nectar [25% of Cupuaçu (Theobroma grandiflorum) pulp and 15% sugar] were determined by the isothermal method (IM), under batch heating, and by the paired equivalent isothermal exposures (PEIE) method, under non-isothermal continuous conditions. The isothermal experiments were repeated three times, every 4 months, with the same spore suspension kept frozen between experiments. The aging of spores, under frozen storage, seemed to produce a notorious increase in the z-value from experiment to experiment: Experiment 1 (z = 7.8 +/- 2.6 degrees C, D(95 degrees C) = 5.29 +/- 0.96 min), Experiment 2 (z = 22 +/- 5 degrees C, D(95 degrees C) = 5.99 +/- 0.63 min), and Experiment 3 (z =29 +/- 10 degrees C, D(95 degrees C) = 3.82 +/- 0.48 min). The evaluation of the kinetic parameters by the PEIE method was carried out in parallel with Experiment 3, with the same aged spores, and the results (z = 31 +/- 6 degrees C, D(95 degrees C) = 5.5 +/- 1.2 min) were close to the ones obtained in this experiment. From this work, it seems that the PEIE method can also be applied to evaluate the reduction parameters of a spore-forming microorganism, and in a more realistic way, since the continuous system eliminates the errors caused by come-up and cool-down times (CUT and CDT) that are unavoidable in isothermal experiments. Therefore, when designing a thermal process for a continuous system, the PEIE method should be used, or the chances are that the process would be underdesigned, risking that the desired level of spore inactivation would not be achieved. An optimization of the thermal processing conditions was next performed for Cupuaçu nectar, considering a 5D reduction in A. acidoterrestris spores. If a pasteurization process is considered, the conditions that ensure safety (9 min at 98 degrees C) only allow a 55% retention of ascorbic acid (AA). If sterilization is considered, 8 s at 115 degrees C will ensure a safe product and retain 98.5% of the original ascorbic acid. Therefore, if A. acidoterrestris is considered as the target microorganism, the nectar should undergo an aseptic high temperature short time principle (HTST) process to achieve a 5D reduction in this acidophilus spore former. However, if the hot-fill-and-hold pasteurization process is preferred, the product should be fortified with ascorbic acid.
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Abstract
. The effects of LASSBio 294, a new 3,4-methylenedioxybenzoyl-2-thienylhydrazone, on vascular tonus were investigated in isolated rat aortic rings. 2. LASSBio 294 induced a concentration-dependent relaxation of intact rat aortic rings with an inhibitory concentration (IC(50)) of 74 microM (95% confidence limits: 59 - 92). The mechanical removal of the endothelium abolished this effect. 3. In aortic rings with intact endothelium the effect of 100 microM LASSBio 294 was not altered by the pharmacological inhibition of NOS and cyclo-oxygenase pathways with 500 microM L-NAME and 10 microM indomethacin, respectively. 4. LASSBio 294 (100 microM) was able to relax aortic rings pre-contracted with high extracellular K(+) (KCl 100 mM). 5. The relaxant effect of LASSBio 294 was fully reversed (and prevented) by the addition of 1 microM ODQ (1H-(1,2,4)oxadiazolo[4,3-a]quinoxaline-1-one), a selective inhibitor of soluble guanylate cyclase. 6. LASSBio 294 (100 microM) had no direct effect on PDE3 and PDE4 activities, however, it increased by 150% cyclic GMP content in aortic rings pre-treated with 100 microM L-NAME and 10 microM indomethacin, as did 1 microM zaprinast, a selective PDE5 inhibitor. 7. In conclusion, LASSBio 294 induced relaxation of isolated rat aorta probably by directly increasing cyclic GMP content, possibly as a consequence of PDE5 inhibition.
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Affiliation(s)
- C L M Silva
- Departamento de Farmacologia Básica e Clínica, Instituto de Ciências Biomédicas, Faculdade de Farmácia, Federal University of Rio de Janeiro, 21941-590, Brazil
| | - F Noël
- Departamento de Farmacologia Básica e Clínica, Instituto de Ciências Biomédicas, Faculdade de Farmácia, Federal University of Rio de Janeiro, 21941-590, Brazil
- Author for correspondence:
| | - E J Barreiro
- Laboratório de Avaliação e Síntese de Substâncias Bioativas (LASSBio), Departamento de Fármacos, Faculdade de Farmácia, Federal University of Rio de Janeiro, 21941-590, Brazil
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Affiliation(s)
- Filipa M. Silva
- Escola Superior de Biotecnologia – UCP, Rua Dr António Bernardino de Almeida, P‐4200 Porto, Portugal
| | - Cristina L. M. Silva
- Escola Superior de Biotecnologia – UCP, Rua Dr António Bernardino de Almeida, P‐4200 Porto, Portugal
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Silva FM, Sims C, Balaban MO, Silva CLM, O'Keefe S. Kinetics of flavour and aroma changes in thermally processed cupuaçu (Theobroma grandiflorum) pulp. J Sci Food Agric 2000; 80:783-787. [PMID: 29345779 DOI: 10.1002/(sici)1097-0010(20000501)80:6<783::aid-jsfa622>3.0.co;2-r] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/1999] [Revised: 10/12/1999] [Accepted: 01/18/2000] [Indexed: 06/07/2023]
Abstract
Changes in 'fresh' and 'cooked-notes' during thermal treatment of cupuaçu (Theobroma grandiflorum) pulp were evaluated and modelled. Isothermal experiments in the temperature range of 70-98 °C were carried out and a non-linear regression was performed to all data to estimate kinetic parameters. 'Fresh' and 'cooked-notes' change followed simple first-order (Ea = 78-82 kJ·mol-1 , z = 30-31 °C) and reversible first order (Ea = 80-85 kJ·mol-1 ) kinetics, respectively. Although 'cooked-notes' were linearly correlated with 'fresh-notes' (R2 = 0.99), the former was a better indicator for quality degradation. These results are useful to design pasteurisation processes while minimising sensory changes. © 2000 Society of Chemical Industry.
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Affiliation(s)
- Filipa M Silva
- Escola Superior de Biotecnologia-UCP, Rua Dr. António Bernardino de Almeida, P-4200-072 Porto, Portugal
| | - Charles Sims
- Food Science and Human Nutrition Department, University of Florida, Gainesville, FL 32611-0370, USA
| | - Murat O Balaban
- Food Science and Human Nutrition Department, University of Florida, Gainesville, FL 32611-0370, USA
| | - Cristina L M Silva
- Escola Superior de Biotecnologia-UCP, Rua Dr. António Bernardino de Almeida, P-4200-072 Porto, Portugal
| | - Sean O'Keefe
- Department of Food Science and Technology, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
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