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- W2009093015 abstract "Abstract Near‐infrared (NIR) spectroscopy can potentially provide on‐line information on substrate, biomass, product, and metabolite concentrations in fermentation processes, which could be useful for improved monitoring or control. However, several factors can negatively influence the quality of chemometric models built for interpretation of the spectra, thus impairing the analyte concentration predictions. The aim of this review was to provide an overview of necessary conditions and challenges that one has to face when developing a NIR application for monitoring of cell culture or fermentation processes. Important practical aspects are introduced, such as sampling, modeling of biomass concentration, influence of microorganism morphology on the spectra, effects of the hydrodynamic conditions in the fermenter, temperature influence, instrument settings, and signal optimization. Several examples from the literature are provided, which will hopefully guide the reader interested in the topic. Furthermore, the general procedure used for the development of calibration models is presented, and the influence of microorganism metabolism—potential source of correlation between analytes—is commented. Other important issues such as wavelength selection and evaluation of robustness are shortly introduced. Finally, some examples of potential applications of NIR monitoring are provided, including the implementation of control strategies, the combination with other monitoring tools (the so‐called sensor fusion), and the description of process trajectories. On the basis of the review, we conclude that acceptance of NIR spectroscopy as a standard monitoring tool by the fermentation industry will necessitate considerably more on‐line studies using industrially relevant—and highly challenging—fermentation conditions (high aeration intensity, high biomass concentration and viscosity, and filamentous production strain). © 2009 American Institute of Chemical Engineers Biotechnol. Prog., , 2009" @default.
- W2009093015 created "2016-06-24" @default.
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- W2009093015 date "2009-09-28" @default.
- W2009093015 modified "2023-10-18" @default.
- W2009093015 title "Application of near-infrared spectroscopy for monitoring and control of cell culture and fermentation" @default.
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- W2009093015 doi "https://doi.org/10.1002/btpr.280" @default.
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