Monitoring of phenolic compounds in the food industry and for environmental and medical applications has become more relevant in recent years. Conventional methods for detection and quantification of these compounds, such as spectrophotometry and chromatography, are time consuming and expensive. However, laccase biosensors represent a fast method for on-line and in situ monitoring of these compounds. We discuss the main transduction principles. We divide the electrochemical principle into amperometric, voltammetric, potentiometric and conductometric sensors. We divide optical transducers into fluorescence and absorption. The amperometric transducer method is the most widely studied and used for laccase biosensors. Optical biosensors present higher sensitivity than the other biosensors. Laccase production is dominated by a few fungus genera: Trametes, Aspergillus, and Ganoderma. We present an overview of laccase biosensors used for the determination of phenolic compounds in industrial application

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Cultivation of algae (micro and macro) can be used to produce several high‐ value metabolites to supply industries as cosmetics, additives, and pigments, among others. Those metabolites can have physiological and nutritional benefits for human and animal health. However, the availability of high‐value metabolites from algae is still unaffordable due to traditional extraction techniques and their requirements of energy and use of pollutant solvents. Recently, green extraction technologies for the extraction of high‐value metabolites have become more desirable due to their sustainability and environmental benefits. However, the information about green extraction metabolites from algae is limited. Therefore, this review highlights the main green extraction technologies – supercritical fluid extraction (SFE), microwave assisted extraction (MAE), and pressurized liquid extraction (PLE) – and their optimal parameters for the extraction of high‐value metabolites from algae. First, general information is given regarding high‐ value metabolites from algae. Then, the review summarizes the principles, processes, advantages, and disadvantages of each technology. Finally, it presents recommendations and concluding remarks to select the best extraction technology. © 2016 Society of Chemical Industry and John Wiley & Sons, Ltd

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