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Impact of microcarrier concentration on mesenchymal stem cell growth and death: Experiments and modelling. Biotechnol Bioeng 2022; 119:3537-3548. [DOI: 10.1002/bit.28228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 08/31/2022] [Accepted: 09/06/2022] [Indexed: 11/12/2022]
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2
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Mesenchymal Stem/Stromal Cells: IMPACT OF MICROCARRIER CONCENTRATION ON MESENCHYMAL STEM CELL EXPANSION KINETICS AND QUALITY ATTRIBUTES. Cytotherapy 2022. [DOI: 10.1016/s1465-3249(22)00206-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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3
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Hydrodynamic Characterization of a Non‐conventional Photobioreactor. Chem Eng Technol 2021. [DOI: 10.1002/ceat.202100076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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4
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Determination of local fluid dynamic parameters in structured packings through X-ray tomography: Overcoming image resolution restrictions. Chem Eng Sci 2021. [DOI: 10.1016/j.ces.2020.115997] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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5
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Recent Advances in Experimental Techniques for Flow and Mass Transfer Analyses in Thermal Separation Systems. CHEM-ING-TECH 2020. [DOI: 10.1002/cite.202000076] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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6
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Full Pre-Steady-State Kinetic Analysis of Single Nucleotide Incorporation by DNA Polymerases. ACTA ACUST UNITED AC 2020; 78:e98. [PMID: 31529783 DOI: 10.1002/cpnc.98] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
By measuring a DNA polymerase incorporation reaction on a very short time scale (5 ms to 10 s) and with a high enzyme concentration, the isolated event of a single nucleotide incorporation can be analyzed. Practically, this is done using a quench-flow instrument, which allows the rapid mixing of the enzyme-primer/template with the nucleotide substrate, after which the reaction is quenched and analyzed. We describe how to titrate the enzyme active site, how to determine, via a scouting experiment, the rate-limiting step in the polymerization reaction, and how to measure the apparent kpol , Kd(DNA) , and Kd(N) using burst or single-turnover experiments. We include equations for the calculation of the processivity of the polymerase, its nucleotide incorporation specificity and preference, and the activation energy difference for the incorporation of an incorrect nucleotide. Data analysis is discussed, as this is an essential part of accurate data generation in kinetic analyses. © 2019 by John Wiley & Sons, Inc.
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Kinetic analysis of N-alkylaryl carboxamide hexitol nucleotides as substrates for evolved polymerases. Nucleic Acids Res 2019; 47:2160-2168. [PMID: 30698800 PMCID: PMC6412122 DOI: 10.1093/nar/gkz008] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Revised: 12/21/2018] [Accepted: 01/21/2019] [Indexed: 11/20/2022] Open
Abstract
Six 1′,5′-anhydrohexitol uridine triphosphates were synthesized with aromatic substitutions appended via a carboxamide linker to the 5-position of their bases. An improved method for obtaining such 5-substituted hexitol nucleosides and nucleotides is described. The incorporation profile of the nucleotide analogues into a DNA duplex overhang using recently evolved XNA polymerases is compared. Long, mixed HNA sequences featuring the base modifications are generated. The apparent binding affinity of four of the nucleotides to the enzyme, the rate of the chemical step and of product release, plus the specificity constant for the incorporation of these modified nucleotides into a DNA duplex overhang using the HNA polymerase T6G12_I521L are determined via pre-steady-state kinetics. HNA polymers displaying aromatic functional groups could have significant impact on the isolation of stable and high-affinity binders and catalysts, or on the design of nanomaterials.
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Dimensional analysis and CFD simulations of microcarrier ‘just-suspended’ state in mesenchymal stromal cells bioreactors. Chem Eng Sci 2019. [DOI: 10.1016/j.ces.2019.04.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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10
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An approach to separation efficiency modelling of structured packings based on X-ray tomography measurements: Application to aqueous viscous systems. Chem Eng Sci 2019. [DOI: 10.1016/j.ces.2019.03.059] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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11
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Optimization of the Impeller Design for Mesenchymal Stem Cell Culture on Microcarriers in Bioreactors. Chem Eng Technol 2019. [DOI: 10.1002/ceat.201900105] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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12
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Identifying dominant spatial and time characteristics of flow dynamics within free-surface baffled stirred-tanks from CFD simulations. Chem Eng Sci 2018. [DOI: 10.1016/j.ces.2018.07.024] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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13
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Comparison of hydrodynamics in standard stainless steel and single-use bioreactors by means of an Euler-Lagrange approach. Chem Eng Sci 2018. [DOI: 10.1016/j.ces.2018.01.034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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14
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Solid-liquid suspension of microcarriers in stirred tank bioreactor – Experimental and numerical analysis. Chem Eng Sci 2018. [DOI: 10.1016/j.ces.2018.01.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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15
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Analysis of PIV measurements using modal decomposition techniques, POD and DMD, to study flow structures and their dynamics within a stirred-tank reactor. Chem Eng Sci 2018. [DOI: 10.1016/j.ces.2017.12.047] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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16
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Investigating the effects of hydrodynamics and mixing on mass transfer through the free-surface in stirred tank bioreactors. Chem Eng Sci 2017. [DOI: 10.1016/j.ces.2017.06.028] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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17
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Influence of liquid phase hydrodynamics on biofilm formation on structured packing: Optimization of surfactin production from Bacillus amyloliquefaciens. Chem Eng Sci 2017. [DOI: 10.1016/j.ces.2016.08.023] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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18
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Microbial population heterogeneity versus bioreactor heterogeneity: Evaluation of Redox Sensor Green as an exogenous metabolic biosensor. Eng Life Sci 2016. [DOI: 10.1002/elsc.201500149] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
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19
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DPSC colonization of functionalized 3D textiles. J Biomed Mater Res B Appl Biomater 2016; 105:785-794. [DOI: 10.1002/jbm.b.33609] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Revised: 10/14/2015] [Accepted: 12/08/2015] [Indexed: 12/26/2022]
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20
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Revisiting the determination of hydromechanical stresses encountered by microcarriers in stem cell culture bioreactors. BMC Proc 2015. [PMCID: PMC4685365 DOI: 10.1186/1753-6561-9-s9-p41] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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21
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Influence of process operating conditions on solvent thermal and oxidative degradation in post-combustion CO2 capture. Comput Chem Eng 2015. [DOI: 10.1016/j.compchemeng.2015.05.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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22
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Euler–Lagrange approach to model heterogeneities in stirred tank bioreactors – Comparison to experimental flow characterization and particle tracking. Chem Eng Sci 2015. [DOI: 10.1016/j.ces.2015.05.045] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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23
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Investigation of the links between mass transfer conditions, dissolved hydrogen concentration and biohydrogen production by the pure strain Clostridium butyricum CWBI1009. Biochem Eng J 2015. [DOI: 10.1016/j.bej.2015.01.008] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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24
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Highly efficient, long life, reusable and robust photosynthetic hybrid core–shell beads for the sustainable production of high value compounds. J Colloid Interface Sci 2015; 448:79-87. [DOI: 10.1016/j.jcis.2015.01.091] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2014] [Revised: 01/29/2015] [Accepted: 01/31/2015] [Indexed: 11/30/2022]
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25
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A fungal biofilm reactor based on metal structured packing improves the quality of a Gla::GFP fusion protein produced by Aspergillus oryzae. Appl Microbiol Biotechnol 2015; 99:6241-54. [PMID: 25935344 DOI: 10.1007/s00253-015-6608-z] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2015] [Revised: 04/02/2015] [Accepted: 04/09/2015] [Indexed: 12/01/2022]
Abstract
Fungal biofilm is known to promote the excretion of secondary metabolites in accordance with solid-state-related physiological mechanisms. This work is based on the comparative analysis of classical submerged fermentation with a fungal biofilm reactor for the production of a Gla::green fluorescent protein (GFP) fusion protein by Aspergillus oryzae. The biofilm reactor comprises a metal structured packing allowing the attachment of the fungal biomass. Since the production of the target protein is under the control of the promoter glaB, specifically induced in solid-state fermentation, the biofilm mode of culture is expected to enhance the global productivity. Although production of the target protein was enhanced by using the biofilm mode of culture, we also found that fusion protein production is also significant when the submerged mode of culture is used. This result is related to high shear stress leading to biomass autolysis and leakage of intracellular fusion protein into the extracellular medium. Moreover, 2-D gel electrophoresis highlights the preservation of fusion protein integrity produced in biofilm conditions. Two fungal biofilm reactor designs were then investigated further, i.e. with full immersion of the packing or with medium recirculation on the packing, and the scale-up potentialities were evaluated. In this context, it has been shown that full immersion of the metal packing in the liquid medium during cultivation allows for a uniform colonization of the packing by the fungal biomass and leads to a better quality of the fusion protein.
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Hydrodynamics in a disposable rectangular parallelepiped stirred bioreactor with elliptic pendulum motion paddle. Biochem Eng J 2015. [DOI: 10.1016/j.bej.2014.10.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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28
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Relevance of accelerated conditions for the study of monoethanolamine degradation in post-combustion CO2capture. CAN J CHEM ENG 2014. [DOI: 10.1002/cjce.22094] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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29
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Influence of Dissolved Metals and Oxidative Degradation Inhibitors on the Oxidative and Thermal Degradation of Monoethanolamine in Postcombustion CO2 Capture. Ind Eng Chem Res 2014. [DOI: 10.1021/ie5036572] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Implementation of a metal structured packing in a fungal biofilm reactor for the production of a recombinant protein by Aspergillus oryzae. COMMUNICATIONS IN AGRICULTURAL AND APPLIED BIOLOGICAL SCIENCES 2014; 79:161-166. [PMID: 25864332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
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33
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Tomographische und numerische Untersuchung des Einflusses der Viskosität auf das Trennverhalten wässriger Systeme in Packungskolonnen. CHEM-ING-TECH 2012. [DOI: 10.1002/cite.201250175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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34
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A non-linear homogeneous model for bone-like materials under compressive load. INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN BIOMEDICAL ENGINEERING 2012; 28:273-287. [PMID: 25099330 DOI: 10.1002/cnm.1473] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2011] [Revised: 07/15/2011] [Accepted: 09/01/2011] [Indexed: 06/03/2023]
Abstract
Finite element (FE) models accurately compute the mechanical response of bone and bone-like materials when the models include their detailed microstructure. In order to simulate non-linear behavior, which currently is only feasible at the expense of extremely high computational costs, coarser models can be used if the local morphology has been linked to the apparent mechanical behavior. The aim of this paper is to implement and validate such a constitutive law. This law is able to capture the non-linear structural behavior of bone-like materials through the use of fabric tensors. It also allows for irreversible strains using an elastoplastic material model incorporating hardening. These features are expressed in a constitutive law based on the anisotropic continuum damage theory coupled with isotropic elastoplasticity in a finite strain framework. This material model was implemented into metafor (LTAS-MNNL, University of Liège, Belgium), a non-linear FE software. The implementation was validated against experimental data of cylindrical samples subjected to compression. Three materials with bone-like microstructure were tested: aluminum foams of variable density (ERG, Oakland, CA, USA), polylactic acid foam (CERM, University of Liège, Liège, Belgium), and cancellous bone tissue of a deer antler (Faculty of Veterinary Medicine, University of Liège, Liège, Belgium).
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35
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Determination of liquid hold-up and flow distribution inside modular catalytic structured packings. Chem Eng Res Des 2011. [DOI: 10.1016/j.cherd.2011.02.009] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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36
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Characterization of the response of GFP microbial biosensors sensitive to substrate limitation in scale-down bioreactors. Biochem Eng J 2011. [DOI: 10.1016/j.bej.2011.03.016] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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37
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Axial impeller selection for anchorage dependent animal cell culture in stirred bioreactors: Methodology based on the impeller comparison at just-suspended speed of rotation. Chem Eng Sci 2010. [DOI: 10.1016/j.ces.2010.08.027] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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38
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39
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Liquid load point determination in a reactive distillation packing by X-ray tomography. CAN J CHEM ENG 2010. [DOI: 10.1002/cjce.20320] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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40
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41
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Possibilities and Limits of Application of Electrical Resistance Tomography in Hydrodynamics of Bubble Columns. CAN J CHEM ENG 2008. [DOI: 10.1002/cjce.5450830103] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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42
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Influence of back mixing on the convective drying of residual sludges in a fixed bed. WATER RESEARCH 2008; 42:2671-2677. [PMID: 18316109 DOI: 10.1016/j.watres.2008.01.020] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2007] [Revised: 01/21/2008] [Accepted: 01/23/2008] [Indexed: 05/26/2023]
Abstract
The influence of a backmixing operation on the convective belt drying of two wastewater sludges was studied. The expansion of the sludge extrudates bed due to increasing additions of dry product was quantified by using X-ray tomography. This non-invasive technique was used to determine the bed porosity and the total exchange area available for heat and mass transfers, for increasing levels of backmixing. For a same drying flux, the expansion of the drying bed leads to higher drying rates, allowing a reduction of the total drying time. In this context, rheological properties of the sludges are key properties.
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Analysis of gas holdup in bubble columns with non-Newtonian fluid using electrical resistance tomography and dynamic gas disengagement technique. Chem Eng Sci 2005. [DOI: 10.1016/j.ces.2005.03.046] [Citation(s) in RCA: 87] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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45
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46
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Assessment of cognitive function in older hospital inpatients: is the Telephone Interview for Cognitive Status (TICS-M) a useful alternative to the Mini Mental State Examination? Int J Geriatr Psychiatry 2004; 19:1008-9. [PMID: 15449371 DOI: 10.1002/gps.1181] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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47
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Liquid Hold-up Distribution in a Corrugated Sheet Structured Packing Measured by X-Ray Tomography. CHEM-ING-TECH 2001. [DOI: 10.1002/1522-2640(200106)73:6<739::aid-cite7391111>3.0.co;2-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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48
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Analysis of Electrical Resistance Tomography Measurements Obtained on a Bubble Column. CHEM-ING-TECH 2001. [DOI: 10.1002/1522-2640(200106)73:6<754::aid-cite7543333>3.0.co;2-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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49
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Imaging of Liquid Distribution within Corrugated Sheet Structured Packing Beds by X-Ray Computed Tomography. CHEM-ING-TECH 2000. [DOI: 10.1002/1522-2640(200009)72:9<1010::aid-cite10101>3.0.co;2-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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50
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