Microalgae degradation follow up by voltammetric electronic tongue, impedance spectroscopy and NMR spectroscopy

Martínez-Bisbal, M. Carmen; Mestre, Noèlia Carbó; Martínez‐Máñez, Ramón; Bauzá, Jorge; Alcañíz, Miguel

doi:10.1016/j.snb.2018.10.069

Cited by 12 publications

(12 citation statements)

References 66 publications

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“…The very similar nature of all compounds produced during microalgae cultivation, the downstream of these molecules in a cost-effective manner are the main challenges in establishing a microalgae-based bioprocess. Some of those chemicals have demonstrated anticancer [70], anti-infective [71], antioxidant [72], immunostimulatory [73], anti-inflammatory [74] activities, and hypocholesterolaemia effect [75]. The following topics describe briefly three of the most researched biological activities observed in microalgae-derived bioproducts, while details regarding their mechanism and purification procedures are left intentionally out of this review.…”

Section: Green Products Potentialmentioning

confidence: 99%

Microalgae: Cultivation Aspects and Bioactive Compounds

Coelho

Tundisi

Cerqueira

et al. 2019

Braz. arch. biol. technol.

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Microalgae are aquatic unicellular microorganisms that can be found both in freshwater and marine systems; are capable of photosynthesis; and can grow as individual cells or associated in chains or small colonies. Microalgae cultivation has gained large momentum among researchers in the past decades due to their ability to produce value metabolites, remarkable photosynthetic efficiency, and versatile nature. The wide technological potential, and thus increasing amount of scattered knowledge, may become the very first barrier that a post graduating student, or any non-specialist reader, will face when introduced to the subject. In this review paper, we access the core aspects of microalgae technology, covering their main characteristics, and comprehensively presenting the main features of their various cultivation modes and biological activity from metabolites.

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Section: Green Products Potentialmentioning

confidence: 99%

Microalgae: Cultivation Aspects and Bioactive Compounds

Coelho

Tundisi

Cerqueira

et al. 2019

Braz. arch. biol. technol.

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“…Several studies have demonstrated the abundance of primary metabolites produced by microalgae; these metabolites include lipids, fatty acids, amino acids, and some sugars. However, there are few studies that investigate the complex characterization of marine microalgae, especially through more robust tools, and that enable fast, easy, non-destructive, and unbiased screening such as 1 H NMR-based metabolomics [ 32 , 33 , 34 , 35 ]…”

Section: Introductionmentioning

confidence: 99%

Application of 1H HR-MAS NMR-Based Metabolite Fingerprinting of Marine Microalgae

et al. 2023

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Natural products from the marine environment as well as microalgae, have been known for the complexity of the metabolites they produce due to their adaptability to different environmental conditions, which has been an inexhaustible source of several bioactive properties, such as antioxidant, anti-tumor, and antimicrobial. This study aims to characterize the main metabolites of three species of microalgae (Nannochloropsis oceanica, Chaetoceros muelleri, and Conticribra weissflogii), which have important applications in the biofuel and nutrition industries, by 1H High-resolution magic angle spinning nuclear magnetic resonance (1H HR-MAS NMR), a method which is non-destructive, is highly reproducible, and requires minimal sample preparation. Even though the three species were found in the same ecosystem and a superior production of lipid compounds was observed, important differences were identified in relation to the production of specialized metabolites. These distinct properties favor the use of these compounds as leaders in the development of new bioactive compounds, especially against environmental, human, and animal pathogens (One Health), and demonstrate their potential in the development of alternatives for aquaculture.

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“…However, the industrial use of such instruments in detecting food spoilage or the presence of pathogenic microorganisms is still at the early stages and some technical drawbacks still need to be addressed, as reviewed by Ghasemi-Varnamkhasti et al [19]. As recently pointed out, electrochemical sensor devices, such as electronic noses (E-noses) [20,21] and electronic tongues (E-tongues) [22], are the basis of a wide number of low-cost and fast response analytical strategies for the analysis of gas and liquid matrices, respectively. E-tongues based on different sensing technologies (e.g., potentiometric, voltammetric), comprising sets of multisensors with low selectivity and cross-sensitivity, together with multivariate qualitative and quantitative chemometric tools (e.g., principal component analysis (PCA); soft independent modelling of class analogy (SIMCA); linear discriminant analysis (LDA); partial least-squares regression (PLS); support vector machines (SVMs); artificial neural networks (ANNs)) have been successfully applied to directly or indirectly identify several microorganisms.…”

Section: Introductionmentioning

confidence: 99%

A Potentiometric Electronic Tongue as a Discrimination Tool of Water-Food Indicator/Contamination Bacteria

et al. 2021

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Microorganism assessment plays a key role in food quality and safety control but conventional techniques are costly and/or time consuming. Alternatively, electronic tongues (E-tongues) can fulfill this critical task. Thus, a potentiometric lab-made E-tongue (40 lipid sensor membranes) was used to differentiate four common food contamination bacteria, including two Gram positive (Enterococcus faecalis, Staphylococcus aureus) and two Gram negative (Escherichia coli, Pseudomonas aeruginosa). Principal component analysis and a linear discriminant analysis-simulated annealing algorithm (LDA-SA) showed that the potentiometric signal profiles acquired during the analysis of aqueous solutions containing known amounts of each studied bacteria allowed a satisfactory differentiation of the four bacterial strains. An E-tongue-LDA-SA model (12 non-redundant sensors) correctly classified 98 ± 5% of the samples (repeated K-fold-CV), the satisfactory performance of which can be attributed to the capability of the lipid membranes to establish electrostatic interactions/hydrogen bonds with hydroxyl, amine and/or carbonyl groups, which are comprised in the bacteria outer membranes. Furthermore, multiple linear regression models, based on selected subsets of E-tongue sensors (12–15 sensors), also allowed quantifying the bacteria contents in aqueous solutions (0.993 ± 0.011 ≤ R2 ≤ 0.998 ± 0.005, for repeated K-fold-CV). In conclusion, the E-tongue could be of great value as a preliminary food quality and safety diagnosis tool.

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Microalgae degradation follow up by voltammetric electronic tongue, impedance spectroscopy and NMR spectroscopy

Cited by 12 publications

References 66 publications

Microalgae: Cultivation Aspects and Bioactive Compounds

Microalgae: Cultivation Aspects and Bioactive Compounds

Application of 1H HR-MAS NMR-Based Metabolite Fingerprinting of Marine Microalgae

A Potentiometric Electronic Tongue as a Discrimination Tool of Water-Food Indicator/Contamination Bacteria

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