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Volumn 25, Issue , 2017, Pages 381-390

Open thin-layer cascade reactors for saline microalgae production evaluated in a physically simulated Mediterranean summer climate

Author keywords

Economic bioprocess metrics; LED based climate simulation; Nannochloropsis salina; Open thin layer cascade photobioreactor; Pilot scale batch cultivation

Indexed keywords


EID: 85020801906     PISSN: 22119264     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.algal.2017.06.004     Document Type: Article
Times cited : (71)

References (47)
  • 1
    • 84991556390 scopus 로고    scopus 로고
    • Products from microalgae: an overview
    • C. Walter C. Posten De Gruyter Berlin
    • Rosello Sastre, R., Products from microalgae: an overview. Walter, C., Posten, C., (eds.) Microalgal Biotechnology: Integration and Economy, 2012, De Gruyter, Berlin, 15–50.
    • (2012) Microalgal Biotechnology: Integration and Economy , pp. 15-50
    • Rosello Sastre, R.1
  • 2
    • 51849109115 scopus 로고    scopus 로고
    • Second generation biofuels: high-efficiency microalgae for biodiesel production
    • Schenk, P.M., Thomas-Hall, S.R., Stephens, E., Marx, U.C., Mussgnug, J.H., Posten, C., et al., Second generation biofuels: high-efficiency microalgae for biodiesel production. Bioenergy Res. 1 (2008), 20–43, 10.1007/s12155-008-9008-8.
    • (2008) Bioenergy Res. , vol.1 , pp. 20-43
    • Schenk, P.M.1    Thomas-Hall, S.R.2    Stephens, E.3    Marx, U.C.4    Mussgnug, J.H.5    Posten, C.6
  • 3
    • 84937631550 scopus 로고    scopus 로고
    • Demonstrated large-scale production of marine microalgae for fuels and feed
    • Huntley, M.E., Johnson, Z.I., Brown, S.L., Sills, D.L., Gerber, L., Archibald, I., et al., Demonstrated large-scale production of marine microalgae for fuels and feed. Algal Res. 10 (2015), 249–265, 10.1016/j.algal.2015.04.016.
    • (2015) Algal Res. , vol.10 , pp. 249-265
    • Huntley, M.E.1    Johnson, Z.I.2    Brown, S.L.3    Sills, D.L.4    Gerber, L.5    Archibald, I.6
  • 4
    • 1542700022 scopus 로고    scopus 로고
    • A Look Back at the U.S. Department of Energy's Aquatic Species Program: Biodiesel From Algae
    • Sheehan, J., Dunahay, T., Benemann, J.R., Roessler, P., A Look Back at the U.S. Department of Energy's Aquatic Species Program: Biodiesel From Algae. 1998.
    • (1998)
    • Sheehan, J.1    Dunahay, T.2    Benemann, J.R.3    Roessler, P.4
  • 5
    • 67650721445 scopus 로고    scopus 로고
    • The promise and challenges of microalgal-derived biofuels
    • Pienkos, P.T., Darzins, A., The promise and challenges of microalgal-derived biofuels. Biofuels Bioprod. Biorefin. 3 (2009), 431–440, 10.1002/bbb.159.
    • (2009) Biofuels Bioprod. Biorefin. , vol.3 , pp. 431-440
    • Pienkos, P.T.1    Darzins, A.2
  • 6
    • 79952470065 scopus 로고    scopus 로고
    • A Realistic Technology and Engineering Assessment of Algae Biofuel Production: Energy Biosciences Institute Report
    • Lundquist, T.J., Woertz, I.C., Quinn, N.W.T., Benemann, J.R., A Realistic Technology and Engineering Assessment of Algae Biofuel Production: Energy Biosciences Institute Report. 2010.
    • (2010)
    • Lundquist, T.J.1    Woertz, I.C.2    Quinn, N.W.T.3    Benemann, J.R.4
  • 7
    • 70350353220 scopus 로고    scopus 로고
    • From laboratory to commercial production: a case study of a Spirulina (Arthrospira) facility in Musina, South Africa
    • Grobbelaar, J.U., From laboratory to commercial production: a case study of a Spirulina (Arthrospira) facility in Musina, South Africa. J. Appl. Physiol. 21 (2009), 523–527, 10.1007/s10811-008-9378-5.
    • (2009) J. Appl. Physiol. , vol.21 , pp. 523-527
    • Grobbelaar, J.U.1
  • 8
    • 85000577458 scopus 로고    scopus 로고
    • Simulation of outdoor pond cultures using indoor LED-lighted and temperature-controlled raceway ponds and Phenometrics photobioreactors
    • Huesemann, M., Dale, T., Chavis, A., Crowe, B., Twary, S., Barry, A., et al., Simulation of outdoor pond cultures using indoor LED-lighted and temperature-controlled raceway ponds and Phenometrics photobioreactors. Algal Res. 21 (2017), 178–190, 10.1016/j.algal.2016.11.016.
    • (2017) Algal Res. , vol.21 , pp. 178-190
    • Huesemann, M.1    Dale, T.2    Chavis, A.3    Crowe, B.4    Twary, S.5    Barry, A.6
  • 9
    • 84930197499 scopus 로고    scopus 로고
    • Sustainable production of toxin free marine microalgae biomass as fish feed in large scale open system in the Qatari desert
    • Das, P., Thaher, M.I., Hakim, M.A., Al-Jabri, H.M., Sustainable production of toxin free marine microalgae biomass as fish feed in large scale open system in the Qatari desert. Bioresour. Technol. 192 (2015), 97–104, 10.1016/j.biortech.2015.05.019.
    • (2015) Bioresour. Technol. , vol.192 , pp. 97-104
    • Das, P.1    Thaher, M.I.2    Hakim, M.A.3    Al-Jabri, H.M.4
  • 10
    • 0035795173 scopus 로고    scopus 로고
    • An industrial-size flat plate glass reactor for mass production of Nannochloropsis sp. (Eustigmatophyceae)
    • Cheng-Wu, Z., Zmora, O., Kopel, R., Richmond, A., An industrial-size flat plate glass reactor for mass production of Nannochloropsis sp. (Eustigmatophyceae). Aquaculture 195 (2001), 35–49, 10.1016/S0044-8486(00)00533-0.
    • (2001) Aquaculture , vol.195 , pp. 35-49
    • Cheng-Wu, Z.1    Zmora, O.2    Kopel, R.3    Richmond, A.4
  • 12
    • 0003649266 scopus 로고
    • Novel outdoor thin-layer high density microalgal culture system: productivity and operational parameters
    • Doucha, J., Lívanský, K., Novel outdoor thin-layer high density microalgal culture system: productivity and operational parameters. Arch. Hydrobiol. Algol. Stud. Supplement Volumes 76 (1995), 129–147.
    • (1995) Arch. Hydrobiol. Algol. Stud. , vol.76 , pp. 129-147
    • Doucha, J.1    Lívanský, K.2
  • 13
    • 3042665616 scopus 로고
    • Dual purpose open circulation units for large scale culture of algae in temperate zones. I. Basic design considerations and scheme of a pilot plant
    • Šetlík, I., Šust, V., Málek, I., Dual purpose open circulation units for large scale culture of algae in temperate zones. I. Basic design considerations and scheme of a pilot plant. Arch. Hydrobiol. Algol. Stud. Supplement Volumes 1 (1970), 111–164.
    • (1970) Arch. Hydrobiol. Algol. Stud. , vol.1 , pp. 111-164
    • Šetlík, I.1    Šust, V.2    Málek, I.3
  • 14
    • 70350749374 scopus 로고    scopus 로고
    • Ivan Šetlík (1928–2009)
    • Masojídek, J., Ivan Šetlík (1928–2009). J. Appl. Phycol. 21 (2009), 483–488, 10.1007/s10811-009-9450-9.
    • (2009) J. Appl. Phycol. , vol.21 , pp. 483-488
    • Masojídek, J.1
  • 15
    • 33751436377 scopus 로고    scopus 로고
    • 2 exchange and hydraulics in outdoor open high density microalgal (Chlorella sp.) photobioreactors operated in a Middle and Southern European climate
    • 2 exchange and hydraulics in outdoor open high density microalgal (Chlorella sp.) photobioreactors operated in a Middle and Southern European climate. J. Appl. Physiol. 18 (2006), 811–826, 10.1007/s10811-006-9100-4.
    • (2006) J. Appl. Physiol. , vol.18 , pp. 811-826
    • Doucha, J.1    Lívanský, K.2
  • 16
    • 67349098542 scopus 로고    scopus 로고
    • Outdoor open thin-layer microalgal photobioreactor: potential productivity
    • Doucha, J., Lívanský, K., Outdoor open thin-layer microalgal photobioreactor: potential productivity. J. Appl. Phycol. 21 (2009), 111–117, 10.1007/s10811-008-9336-2.
    • (2009) J. Appl. Phycol. , vol.21 , pp. 111-117
    • Doucha, J.1    Lívanský, K.2
  • 17
    • 79951682876 scopus 로고    scopus 로고
    • Productivity correlated to photobiochemical performance of Chlorella mass cultures grown outdoors in thin-layer cascades
    • Masojídek, J., Kopecký, J., Giannelli, L., Torzillo, G., Productivity correlated to photobiochemical performance of Chlorella mass cultures grown outdoors in thin-layer cascades. J. Ind. Microbiol. Biotechnol. 38 (2011), 307–317, 10.1007/s10295-010-0774-x.
    • (2011) J. Ind. Microbiol. Biotechnol. , vol.38 , pp. 307-317
    • Masojídek, J.1    Kopecký, J.2    Giannelli, L.3    Torzillo, G.4
  • 18
    • 84956842683 scopus 로고    scopus 로고
    • Thin-layer systems for mass cultivation of microalgae: flat panels and sloping cascades
    • A. Prokop R.K. Bajpai M.E. Zappi Springer International Publishing Cham
    • Masojídek, J., Sergejevová, M., Malapascua, J.R., Kopecký, J., Thin-layer systems for mass cultivation of microalgae: flat panels and sloping cascades. Prokop, A., Bajpai, R.K., Zappi, M.E., (eds.) Algal Biorefineries: Volume 2: Products and Refinery Design, 2015, Springer International Publishing, Cham, 237–261.
    • (2015) Algal Biorefineries: Volume 2: Products and Refinery Design , pp. 237-261
    • Masojídek, J.1    Sergejevová, M.2    Malapascua, J.R.3    Kopecký, J.4
  • 19
    • 84949115530 scopus 로고    scopus 로고
    • Hydrodynamics and photosynthesis performance of Chlorella fusca (Chlorophyta) grown in a thin-layer cascade (TLC) system
    • Jerez, C.G., Navarro, E., Malpartida, I., Rico, R.M., Masojídek, J., Abdala, R., et al., Hydrodynamics and photosynthesis performance of Chlorella fusca (Chlorophyta) grown in a thin-layer cascade (TLC) system. Aquat. Biol. 22 (2014), 111–122, 10.3354/ab00603.
    • (2014) Aquat. Biol. , vol.22 , pp. 111-122
    • Jerez, C.G.1    Navarro, E.2    Malpartida, I.3    Rico, R.M.4    Masojídek, J.5    Abdala, R.6
  • 20
    • 85020805539 scopus 로고    scopus 로고
    • Microalgae Production Systems - The Cascade Raceways
    • European Algae Biomass Amsterdam
    • Vieira, V.V., Microalgae Production Systems - The Cascade Raceways. 2015, European Algae Biomass, Amsterdam.
    • (2015)
    • Vieira, V.V.1
  • 21
    • 85027954116 scopus 로고    scopus 로고
    • Engineering solutions for open microalgae mass cultivation and realistic indoor simulation of outdoor environments
    • Apel, A.C., Weuster-Botz, D., Engineering solutions for open microalgae mass cultivation and realistic indoor simulation of outdoor environments. Bioprocess Biosyst. Eng. 38 (2015), 995–1008, 10.1007/s00449-015-1363-1.
    • (2015) Bioprocess Biosyst. Eng. , vol.38 , pp. 995-1008
    • Apel, A.C.1    Weuster-Botz, D.2
  • 22
    • 84955190216 scopus 로고    scopus 로고
    • Application of light-emitting diodes (LEDs) in cultivation of phototrophic microalgae: current state and perspectives
    • Glemser, M., Heining, M., Schmidt, J., Becker, A., Garbe, D., Buchholz, R., et al., Application of light-emitting diodes (LEDs) in cultivation of phototrophic microalgae: current state and perspectives. Appl. Microbiol. Biotechnol. 100 (2016), 1077–1088, 10.1007/s00253-015-7144-6.
    • (2016) Appl. Microbiol. Biotechnol. , vol.100 , pp. 1077-1088
    • Glemser, M.1    Heining, M.2    Schmidt, J.3    Becker, A.4    Garbe, D.5    Buchholz, R.6
  • 24
    • 85020831535 scopus 로고    scopus 로고
    • Terrestrial Reference Spectra for Photovoltaic Performance Evaluation(ASTM G173–03)
    • Available from: [December 14, 2016]
    • NREL, Terrestrial Reference Spectra for Photovoltaic Performance Evaluation(ASTM G173–03). Available from: http://rredc.nrel.gov/solar/spectra/am1.5/, 2012 [December 14, 2016].
    • (2012)
    • NREL1
  • 25
    • 84991780666 scopus 로고    scopus 로고
    • Model-based optimization of microalgae areal productivity in flat-plate gas-lift photobioreactors
    • Pfaffinger, C.E., Schöne, D., Trunz, S., Löwe, H., Weuster-Botz, D., Model-based optimization of microalgae areal productivity in flat-plate gas-lift photobioreactors. Algal Res. 20 (2016), 153–163, 10.1016/j.algal.2016.10.002.
    • (2016) Algal Res. , vol.20 , pp. 153-163
    • Pfaffinger, C.E.1    Schöne, D.2    Trunz, S.3    Löwe, H.4    Weuster-Botz, D.5
  • 26
    • 0023213182 scopus 로고
    • Lipid and biomass production by the halotolerant microalga Nannochloropsis salina
    • Boussiba, S., Vonshak, A., Cohen, Z., Avissar, Y., Richmond, A., Lipid and biomass production by the halotolerant microalga Nannochloropsis salina. Biomass 12 (1987), 37–47.
    • (1987) Biomass , vol.12 , pp. 37-47
    • Boussiba, S.1    Vonshak, A.2    Cohen, Z.3    Avissar, Y.4    Richmond, A.5
  • 27
    • 0004258544 scopus 로고
    • Microalgae: Biotechnology and Microbiology
    • Cambridge University Press Cambridge
    • Becker, E.W., Microalgae: Biotechnology and Microbiology. 1993, Cambridge University Press, Cambridge.
    • (1993)
    • Becker, E.W.1
  • 29
    • 85016041768 scopus 로고    scopus 로고
    • Rapid salinity measurements for fluid flow characterisation using minimal invasive sensors
    • Severin, T.S., Plamauer, S., Apel, A.C., Brück, T., Weuster-Botz, D., Rapid salinity measurements for fluid flow characterisation using minimal invasive sensors. Chem. Eng. Sci. 166 (2017), 161–167.
    • (2017) Chem. Eng. Sci. , vol.166 , pp. 161-167
    • Severin, T.S.1    Plamauer, S.2    Apel, A.C.3    Brück, T.4    Weuster-Botz, D.5
  • 30
    • 0002376767 scopus 로고
    • Large-scale algal culture systems (engineering aspects)
    • M.A. Borowitzka L.J. Borowitzka Cambridge University Press Cambridge
    • Oswald, W., Large-scale algal culture systems (engineering aspects). Borowitzka, M.A., Borowitzka, L.J., (eds.) Micro-algal Biotechnology, 1988, Cambridge University Press, Cambridge, 357–394.
    • (1988) Micro-algal Biotechnology , pp. 357-394
    • Oswald, W.1
  • 31
    • 0003469129 scopus 로고    scopus 로고
    • Tables of Physical & Chemical Constants
    • Available from: February 14
    • Kaye, Laby, Tables of Physical & Chemical Constants. Available from: http://www.kayelaby.npl.co.uk/general_physics/2_7/2_7_9.html, February 14, 2017.
    • (2017)
    • Kaye, L.1
  • 32
    • 33749784831 scopus 로고
    • Open-channel Hydraulics
    • McGraw-Hill New York [u.a.]
    • French, R.H., Open-channel Hydraulics. 1987, McGraw-Hill, New York [u.a.].
    • (1987)
    • French, R.H.1
  • 33
    • 84947918317 scopus 로고    scopus 로고
    • The dark side of algae cultivation: characterizing night biomass loss in three photosynthetic algae, Chlorella sorokiniana, Nannochloropsis salina and Picochlorum sp
    • Edmundson, S.J., Huesemann, M.H., The dark side of algae cultivation: characterizing night biomass loss in three photosynthetic algae, Chlorella sorokiniana, Nannochloropsis salina and Picochlorum sp. Algal Res. 12 (2015), 470–476, 10.1016/j.algal.2015.10.012.
    • (2015) Algal Res. , vol.12 , pp. 470-476
    • Edmundson, S.J.1    Huesemann, M.H.2
  • 34
    • 0007677332 scopus 로고
    • Control of photosynthetic production in aquatic ecosystems
    • J.P. Cooper Cambridge University Press Cambridge, New York
    • Stengel, E., Soeder, C.J., Control of photosynthetic production in aquatic ecosystems. Cooper, J.P., (eds.) Photosynthesis and Productivity in Different Environments, 1975, Cambridge University Press, Cambridge, New York, 645–660.
    • (1975) Photosynthesis and Productivity in Different Environments , pp. 645-660
    • Stengel, E.1    Soeder, C.J.2
  • 35
    • 33645345692 scopus 로고    scopus 로고
    • Culturing microalgae in outdoor ponds
    • R.A. Andersen Elsevier/Academic Press Burlington
    • Borowitzka, M.A., Culturing microalgae in outdoor ponds. Andersen, R.A., (eds.) Algal culturing techniques, 2005, Elsevier/Academic Press, Burlington, 205–218.
    • (2005) Algal culturing techniques , pp. 205-218
    • Borowitzka, M.A.1
  • 36
    • 84859369652 scopus 로고    scopus 로고
    • Effects of light and temperature on fatty acid production in Nannochloropsis salina
    • van Wagenen, J., Miller, T.W., Hobbs, S., Hook, P., Crowe, B., Huesemann, M.H., Effects of light and temperature on fatty acid production in Nannochloropsis salina. Energies 5 (2012), 731–740, 10.3390/en5030731.
    • (2012) Energies , vol.5 , pp. 731-740
    • van Wagenen, J.1    Miller, T.W.2    Hobbs, S.3    Hook, P.4    Crowe, B.5    Huesemann, M.H.6
  • 37
    • 84863686387 scopus 로고    scopus 로고
    • A comparison of Nannochloropsis salina growth performance in two outdoor pond designs: conventional raceways versus the ARID pond with superior temperature management
    • Crowe, B., Attalah, S., Agrawal, S., Waller, P., Ryan, R., van Wagenen, J., et al., A comparison of Nannochloropsis salina growth performance in two outdoor pond designs: conventional raceways versus the ARID pond with superior temperature management. Int. J. Chem. Eng. 2012 (2012), 1–9, 10.1155/2012/920608.
    • (2012) Int. J. Chem. Eng. , vol.2012 , pp. 1-9
    • Crowe, B.1    Attalah, S.2    Agrawal, S.3    Waller, P.4    Ryan, R.5    van Wagenen, J.6
  • 38
    • 84861161847 scopus 로고    scopus 로고
    • Nannochloropsis production metrics in a scalable outdoor photobioreactor for commercial applications
    • Quinn, J.C., Yates, T., Douglas, N., Weyer, K., Butler, J., Bradley, T.H., et al., Nannochloropsis production metrics in a scalable outdoor photobioreactor for commercial applications. Bioresour. Technol. 117 (2012), 164–171, 10.1016/j.biortech.2012.04.073.
    • (2012) Bioresour. Technol. , vol.117 , pp. 164-171
    • Quinn, J.C.1    Yates, T.2    Douglas, N.3    Weyer, K.4    Butler, J.5    Bradley, T.H.6
  • 39
    • 0033919965 scopus 로고    scopus 로고
    • Production of cell mass and eicosapentaenoic acid (EPA) in ultrahigh cell density cultures of Nannochloropsis sp. (Eustigmatophyceae)
    • Zou, N., Zhang, C., Cohen, Z., Richmond, A., Production of cell mass and eicosapentaenoic acid (EPA) in ultrahigh cell density cultures of Nannochloropsis sp. (Eustigmatophyceae). Eur. J. Phycol. 35 (2000), 127–133, 10.1080/09670260010001735711.
    • (2000) Eur. J. Phycol. , vol.35 , pp. 127-133
    • Zou, N.1    Zhang, C.2    Cohen, Z.3    Richmond, A.4
  • 40
    • 84886978318 scopus 로고    scopus 로고
    • Biological principles of mass cultivation of photoautotrophic microalgae
    • A. Richmond Q. Hu Wiley Blackwell Chichester
    • Richmond, A., Biological principles of mass cultivation of photoautotrophic microalgae. Richmond, A., Hu, Q., (eds.) Handbook of Microalgal Culture: Applied Phycology and Biotechnology, 2013, Wiley Blackwell, Chichester, 171–204.
    • (2013) Handbook of Microalgal Culture: Applied Phycology and Biotechnology , pp. 171-204
    • Richmond, A.1
  • 41
    • 0022146167 scopus 로고
    • System design for the autotrophic production of microalgae
    • Terry, K.L., Raymond, L.P., System design for the autotrophic production of microalgae. Enzym. Microb. Technol. 7 (1985), 474–487, 10.1016/0141-0229(85)90148-6.
    • (1985) Enzym. Microb. Technol. , vol.7 , pp. 474-487
    • Terry, K.L.1    Raymond, L.P.2
  • 42
    • 85020781270 scopus 로고    scopus 로고
    • How Long Until Algal Biofuel is Commercially Relevant?: Achieving Technology Readiness in the Near Term
    • Warner, C.J., How Long Until Algal Biofuel is Commercially Relevant?: Achieving Technology Readiness in the Near Term. 2012.
    • (2012)
    • Warner, C.J.1
  • 43
    • 84982699549 scopus 로고    scopus 로고
    • Anodic respiration of Pseudomonas putida KT2440 in a stirred-tank bioreactor
    • Hintermayer, S., Yu, S., Krömer, J.O., Weuster-Botz, D., Anodic respiration of Pseudomonas putida KT2440 in a stirred-tank bioreactor. Biochem. Eng. J. 115 (2016), 1–13, 10.1016/j.bej.2016.07.020.
    • (2016) Biochem. Eng. J. , vol.115 , pp. 1-13
    • Hintermayer, S.1    Yu, S.2    Krömer, J.O.3    Weuster-Botz, D.4
  • 45
    • 84861815485 scopus 로고    scopus 로고
    • High lipid induction in microalgae for biodiesel production
    • Sharma, K.K., Schuhmann, H., Schenk, P.M., High lipid induction in microalgae for biodiesel production. Energies 5 (2012), 1532–1553, 10.3390/en5051532.
    • (2012) Energies , vol.5 , pp. 1532-1553
    • Sharma, K.K.1    Schuhmann, H.2    Schenk, P.M.3
  • 46
    • 84890904771 scopus 로고    scopus 로고
    • Evaluation of carbon dioxide mass transfer in raceway reactors for microalgae culture using flue gases
    • de Godos, I., Mendoza, J.L., Acién, F.G., Molina, E., Banks, C.J., Heaven, S., et al., Evaluation of carbon dioxide mass transfer in raceway reactors for microalgae culture using flue gases. Bioresour. Technol. 153 (2014), 307–314, 10.1016/j.biortech.2013.11.087.
    • (2014) Bioresour. Technol. , vol.153 , pp. 307-314
    • de Godos, I.1    Mendoza, J.L.2    Acién, F.G.3    Molina, E.4    Banks, C.J.5    Heaven, S.6
  • 47
    • 84947907481 scopus 로고    scopus 로고
    • Outdoor production of Scenedesmus sp. in thin-layer and raceway reactors using centrate from anaerobic digestion as the sole nutrient source
    • Morales-Amaral, M.D.M., Gómez-Serrano, C., Acién, F.G., Fernández-Sevilla, J.M., Molina-Grima, E., Outdoor production of Scenedesmus sp. in thin-layer and raceway reactors using centrate from anaerobic digestion as the sole nutrient source. Algal Research 12 (2015), 99–108, 10.1016/j.algal.2015.08.020.
    • (2015) Algal Research , vol.12 , pp. 99-108
    • Morales-Amaral, M.D.M.1    Gómez-Serrano, C.2    Acién, F.G.3    Fernández-Sevilla, J.M.4    Molina-Grima, E.5


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