{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,25]],"date-time":"2026-04-25T14:25:49Z","timestamp":1777127149560,"version":"3.51.4"},"reference-count":66,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2021,1,27]],"date-time":"2021-01-27T00:00:00Z","timestamp":1611705600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001659","name":"Deutsche Forschungsgemeinschaft","doi-asserted-by":"publisher","award":["257344691"],"award-info":[{"award-number":["257344691"]}],"id":[{"id":"10.13039\/501100001659","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>The selective paste intrusion (SPI) describes a selective binding, additive manufacturing method. SPI bonds thin layers of aggregate by cement paste locally. Currently, SPI can achieve higher compressive strength, durability, and easier unpacking behavior compared to other selective binding methods suitable for the production of concrete structures. Particle-bed based methods not only achieve much higher surface resolutions than depositing (extrusion)-based additive manufacturing methods but also have no restrictions in freedom of form. However, the mechanical performance of SPI components strongly depends on the void content between the individual layers and thus the penetration behavior of the cement paste. This paper presents direction-dependent measurements of the strength and durability of SPI-printed components compared to casted specimens with the same mixing composition. The results show compressive strength values between 70 and 78 MPa after 7 d, flexural strength of 1\/10 without reinforcement, a high freeze\u2013thaw resistance, no detectable carbonation after 182 days of exposure under ambient CO2\u2013conditions, and after 28 days under increased CO2 content of 2 vol % as well as low chloride penetration resistances. All tests showed in almost all cases no dependency on the layer orientation.<\/jats:p>","DOI":"10.3390\/ma14030586","type":"journal-article","created":{"date-parts":[[2021,1,27]],"date-time":"2021-01-27T06:10:54Z","timestamp":1611727854000},"page":"586","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":27,"title":["Particle-Bed Binding by Selective Paste Intrusion\u2014Strength and Durability of Printed Fine-Grain Concrete Members"],"prefix":"10.3390","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3762-5592","authenticated-orcid":false,"given":"Daniel","family":"Weger","sequence":"first","affiliation":[{"name":"Chair of Materials Science and Testing, Centre for Building Materials (CBM), Technical University of Munich, 81245 Munich, Germany"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1214-3960","authenticated-orcid":false,"given":"Christoph","family":"Gehlen","sequence":"additional","affiliation":[{"name":"Chair of Materials Science and Testing, Centre for Building Materials (CBM), Technical University of Munich, 81245 Munich, Germany"}]}],"member":"1968","published-online":{"date-parts":[[2021,1,27]]},"reference":[{"key":"ref_1","unstructured":"Hull, C.W. (1984). Apparatus for Production of Three-Dimensional Objects by Stereolithography. (06\/638,905), U.S. Patent."},{"key":"ref_2","unstructured":"Sachs, E.M., Haggerty, J.S., Cima, M.J., and Williams, P.A. (1989). Three-Dimensional Printing Techniques. (07\/447,677), U.S. Patent."},{"key":"ref_3","unstructured":"Yoo, J., Cima, M., Khanuja, S., and Sachs, E. (1993, January 9\u201311). Structural Ceramic Components by 3D Printing. Proceedings of theSolid Freeform Fabrication Symposium, Austin, TX, USA."},{"key":"ref_4","unstructured":"Deckard, C.R. (1986). Method and Apparatus for Producing Parts by Selective Sintering. (06\/920,580), U.S. Patent."},{"key":"ref_5","doi-asserted-by":"crossref","unstructured":"Gebhardt, A. (2016). Additive Fertigungsverfahren. Additive Manufacturing und 3D-Drucken f\u00fcr Prototyping\u2014Tooling\u2014Produktion, Hanser. [5th ed.].","DOI":"10.1007\/978-3-446-44539-0"},{"key":"ref_6","unstructured":"Pegna, J. (1995, January 3\u20135). Application of Cementitious Bulk materials to Site Processed Solid Freeform Construction. Proceedings of the Solid Freeform Fabrication Symposium, Austin, TX, USA."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"427","DOI":"10.1016\/S0926-5805(96)00166-5","article-title":"Exploratory investigation of solid freeform construction","volume":"5","author":"Pegna","year":"1997","journal-title":"Autom. Constr."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"106068","DOI":"10.1016\/j.cemconres.2020.106068","article-title":"A process classification framework for defining and describing Digital Fabrication with Concrete","volume":"134","author":"Buswell","year":"2020","journal-title":"Cem. Concr. Res."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"50","DOI":"10.1016\/j.cemconres.2018.05.018","article-title":"Particle-bed 3D printing in concrete construction\u2014Possibilities and challenges","volume":"112","author":"Lowke","year":"2018","journal-title":"Cem. Concr. Res."},{"key":"ref_10","unstructured":"Ludwig, H.-M. (2015, January 16\u201318). 3D-Drucken von Betonbauteilen durch Selektives Binden mit Calciumsilikatbasierten Zementen\u2014Erste Ergebnisse zu Beton\u2014Technologischen und Verfahrenstechnischen Einfl\u00fcssen. Proceedings of the Tagungsbericht 19 Internationale Baustofftagung, Weimar, Germany."},{"key":"ref_11","unstructured":"Fromm, A. (2014). 3-D-Printing Zementgebundender Formteile. Grundlagen, Entwicklung und Verwendung, Kassel University Press GmbH."},{"key":"ref_12","doi-asserted-by":"crossref","unstructured":"Zuo, W., Dong, C., Keita, E., and Roussel, N. (2020, January 6\u20139). Penetration Study of Liquid in Powder Bed for 3D Powder-Bed Printing. Proceedings of the Second RILEM International Conference on Concrete and Digital Fabrication, Eindhoven, The Netherlands.","DOI":"10.1007\/978-3-030-49916-7_39"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"106077","DOI":"10.1016\/j.cemconres.2020.106077","article-title":"Particle bed 3D printing by selective cement activation\u2014Applications, material and process technology","volume":"134","author":"Lowke","year":"2020","journal-title":"Cem. Concr. Res."},{"key":"ref_14","unstructured":"Talke, D., Henke, K., and Weger, D. (2019, January 7\u201310). Selective Cement Activation (SCA)\u2014New possibilities for additive manufacturing in construction. Proceedings of the Form and Force 2019 IASS 60th Anniversary Symposium, Barcelona, Spain."},{"key":"ref_15","doi-asserted-by":"crossref","unstructured":"Xia, M., Nematollahi, B., and Sanjayan, J. (2020, January 6\u20139). Shape Accuracy Evaluation of Geopolymer Specimens Made Using Particle-Bed 3D Printing. Proceedings of the Second RILEM International Conference on Concrete and Digital Fabrication, Eindhoven, The Netherlands.","DOI":"10.1007\/978-3-030-49916-7_98"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"102964","DOI":"10.1016\/j.autcon.2019.102964","article-title":"Dimensional accuracy, flowability, wettability, and porosity in inkjet 3DP for gypsum and cement mortar materials","volume":"110","author":"Shakor","year":"2020","journal-title":"Autom. Constr."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"430","DOI":"10.1016\/j.actaastro.2013.07.034","article-title":"Building components for an outpost on the Lunar soil by means of a novel 3D printing technology","volume":"93","author":"Cesaretti","year":"2014","journal-title":"Acta Astronaut."},{"key":"ref_18","doi-asserted-by":"crossref","unstructured":"Weger, D., Kim, H., Talke, D., Henke, K., Kr\u00e4nkel, T., and Gehlen, C. (2020, January 6\u20139). Lightweight Concrete 3D Printing by Selective Cement Activation\u2014Investigation of Thermal Conductivity, Strength and Water Distribution. Proceedings of the Second RILEM International Conference on Concrete and Digital Fabrication, Eindhoven, The Netherlands.","DOI":"10.1007\/978-3-030-49916-7_17"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"398","DOI":"10.1016\/j.conbuildmat.2017.02.037","article-title":"Modified 3D printed powder to cement-based material and mechanical properties of cement scaffold used in 3D printing","volume":"138","author":"Shakor","year":"2017","journal-title":"Constr. Build. Mater."},{"key":"ref_20","doi-asserted-by":"crossref","unstructured":"Shakor, P., Nejadi, S., Paul, G., Sanjayan, J., and Nazari, A. (2019). Mechanical Properties of Cement-Based Materials and Effect of Elevated Temperature on 3-D Printed Mortar Specimens in Inkjet 3-D Printing. ACI Mater. J., 116.","DOI":"10.14359\/51714452"},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"382","DOI":"10.1016\/j.matdes.2016.07.136","article-title":"Method of formulating geopolymer for 3D printing for construction applications","volume":"110","author":"Xia","year":"2016","journal-title":"Mater. Des."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"177","DOI":"10.4028\/www.scientific.net\/MSF.939.177","article-title":"Influence of Binder Saturation Level on Compressive Strength and Dimensional Accuracy of Powder-Based 3D Printed Geopolymer","volume":"939","author":"Xia","year":"2018","journal-title":"Mater. Sci. Forum"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"281","DOI":"10.1016\/j.matlet.2018.05.100","article-title":"Methods of enhancing strength of geopolymer produced from powder-based 3D printing process","volume":"227","author":"Xia","year":"2018","journal-title":"Mater. Lett."},{"key":"ref_24","doi-asserted-by":"crossref","unstructured":"Nematollahi, B., Xia, M., and Sanjayan, J. (2019). Post-processing Methods to Improve Strength of Particle-Bed 3D Printed Geopolymer for Digital Construction Applications. Front. Mater., 6.","DOI":"10.3389\/fmats.2019.00160"},{"key":"ref_25","unstructured":"Maekawa, K., Kasuga, A., and Yamazaki, J. (2016, January 29\u201331). 3D printing of concrete structures using the selective binding method\u2014Effect of concrete technology on contour precision and compressive strength. Proceedings of the 11th FIB International PhD Symposium in Civil Engineering, Tokyo, Japan."},{"key":"ref_26","unstructured":"Prasittisopin, L., Pongpaisanseree, K., Snguanyat, C., and Dini, E. (2018, January 9\u201312). A 3D Printing Cement Mortar for Powder-bed (D-Shape) Machine. Proceedings of the RILEM 1st International Conference on Concrete and Digital Fabrication, Zurich, Switzerland."},{"key":"ref_27","unstructured":"Weger, D., Lowke, D., Gehlen, C., Talke, D., and Henke, K. (2018, January 9\u201312). Additive manufacturing of concrete elements using selective cement paste intrusion\u2014Effect of layer orientation on strength and durability. Proceedings of the RILEM 1st International Conference on Concrete and Digital Fabrication, Zurich, Switzerland."},{"key":"ref_28","unstructured":"Weger, D., Gehlen, C., and Lowke, D. (2018, January 12\u201314). Additive Fertigung von Betonbauteilen durch selektive Zementleim-Intrusion. Proceedings of the IBAUSIL 2018, Weimar, Germany."},{"key":"ref_29","unstructured":"Weger, D. (2020). Additive Manufacturing of Concrete Structures by Selective Paste Intrusion\u2014SPI\/Additive Fertigung von Betonstrukturen mit der Selective Paste Intrusion\u2014SPI. [Ph.D. Thesis, Technical University of Munich]. (In Germany)."},{"key":"ref_30","doi-asserted-by":"crossref","unstructured":"Weger, D., Baier, D., Stra\u00dfer, A., Prottung, S., Kr\u00e4nkel, T., Bachmann, A., Gehlen, C., and Z\u00e4h, M. (2020, January 6\u20139). Reinforced Particle-Bed Printing by Combination of the Selective Paste Intrusion Method with Wire and Arc Additive Manufacturing\u2014A First Feasibility Study. Proceedings of the Second RILEM International Conference on Concrete and Digital Fabrication, Eindhoven, The Netherlands.","DOI":"10.1007\/978-3-030-49916-7_95"},{"key":"ref_31","unstructured":"Weger, D., Lowke, D., and Gehlen, C. (2016, January 9\u201311). 3D Printing of Concrete Structures with Calcium Silicate based Cements using the Selective Binding Method\u2014Effects of Concrete Technology on Penetration Depth of Cement Paste. Proceedings of the Hipermat 2016\u20144th International Symposium on Ultra-High Performance Concrete and High Performance Construction Materials, Kassel, Germany."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"22","DOI":"10.1617\/s11527-018-1148-5","article-title":"Penetration of cement pastes into sand packings during 3D printing: Analytical and experimental study","volume":"51","author":"Pierre","year":"2018","journal-title":"Mater. Struct."},{"key":"ref_33","doi-asserted-by":"crossref","unstructured":"Pierre, A., Weger, D., Perrot, A., and Lowke, D. (2020, January 6\u20139). 2D Numerical Modelling of Particle-Bed 3D Printing by Selective Paste Intrusion. Proceedings of the Second RILEM International Conference on Concrete and Digital Fabrication, Eindhoven, The Netherlands.","DOI":"10.1007\/978-3-030-49916-7_35"},{"key":"ref_34","doi-asserted-by":"crossref","unstructured":"Pierre, A., Weger, D., Perrot, A., and Lowke, D. (2020). Additive Manufacturing of Cementitious Materials by Selective Paste Intrusion: Numerical Modeling of the Flow Using a 2D Axisymmetric Phase Field Method. Materials, 13.","DOI":"10.3390\/ma13215024"},{"key":"ref_35","doi-asserted-by":"crossref","unstructured":"Weger, D., Pierre, A., Perrot, A., Kr\u00e4nkel, T., Lowke, D., and Gehlen, C. (2021). Penetration of Cement Pastes into Particle-Beds: A Comparison of Penetration Models. Materials, 14.","DOI":"10.3390\/ma14020389"},{"key":"ref_36","unstructured":"Weger, D., Talke, D., Lowe, D., and Henke, K. (2017). 3D-Betondruck, Variante \u2019Paste Intrusion\u2019. Herstellung eines mit inneren Streben ausgesteiften Rohres. Gef\u00f6rdert durch Informationszentrum Beton GmbH, ITSZ-Medienzentrum Technische Universit\u00e4t M\u00fcnchen."},{"key":"ref_37","unstructured":"Weger, D., Gehlen, C., and Lowke, D. (2018, January 11\u201312). 3D-Betondrucken\u2014Stand der Forschung an der TUM. Proceedings of the 59th Forschungskolloquium des DAfStb, Munich, Germany."},{"key":"ref_38","first-page":"1","article-title":"Prozesstechnische Optimierung der additiven Fertigungsmethode Selective Cement Paste Intrusion durch Einsatz von Zusatzmitteln","volume":"46","author":"Weger","year":"2019","journal-title":"Wiss. Kurzber. CBM"},{"key":"ref_39","unstructured":"Deutsches Institut f\u00fcr Normung E.V (1998). DIN EN 1015-7:1998. Pr\u00fcfverfahren f\u00fcr M\u00f6rtel f\u00fcr Mauerwerk\u2014Teil 7: Bestimmung des Luftgehaltes von Frischm\u00f6rtel, Beuth Verlag GmbH."},{"key":"ref_40","unstructured":"Deutsches Institut f\u00fcr Normung E.V (2009). DIN EN 12390-7:2009. Pr\u00fcfung von Festbeton\u2014Teil 7: Rohdichte von Festbeton, Beuth Verlag GmbH."},{"key":"ref_41","unstructured":"Deutsches Institut f\u00fcr Normung E.V (2009). DIN EN 12390-3:2009-07. Compressive Strength of Test Speciments\u2014Druckfestigkeit von Probek\u00f6rpern, July 2009, Beuth Verlag GmbH."},{"key":"ref_42","unstructured":"Deutsches Institut f\u00fcr Normung E.V (2016). DIN EN 196-1:2016. Pr\u00fcfverfahren f\u00fcr Zement\u2014Teil 1: Bestimmung der Festigkeit; Deutsche Fassung EN 196-1:2016\/Methods of testing cement\u2014Part 1: Determination of strength, Beuth Verlag GmbH. German version EN 196-1:2016."},{"key":"ref_43","unstructured":"Comite Europeen de Normalisation CEN\/TS 12390-9:2016 (DIN SPEC 91167)\u2014Testing Hardened Concrete\u2014Part 9: Freeze-thaw Resistance with De-Icing Salts\u2014Scaling Pr\u00fcfung von Festbeton\u2014Teil 9: Frost-und Frost-Tausalz-Widerstand\u2014Abwitterung, Comite Europeen de Normalisation. Deutsche Fassung DIN CEN\/TS 12390-9:2017-05, ics 91.100.30."},{"key":"ref_44","unstructured":"Bundesanstalt f\u00fcr Wasserbau (2018, May 30). BAWMerkblatt: Frostpr\u00fcfung von Beton (MFB). Ausgabe. Available online: https:\/\/izw.baw.de\/publikationen\/merkblaetter\/0\/BAWMerkblatt_Frostpruefung_Beton_MFB_2012.pdf."},{"key":"ref_45","unstructured":"Deutsches Institut f\u00fcr Normung E.V (2007). DIN CEN\/TS 12390-10:2007-12. Pr\u00fcfung von Festbeton\u2014Teil 10: Bestimmung des relativen Karbonatisierungswiderstandes von Beton, Beuth. Deutsche Fassung CEN\/TS 12390-10:2007."},{"key":"ref_46","doi-asserted-by":"crossref","first-page":"93","DOI":"10.1557\/PROC-85-123","article-title":"Influence of Type of Cement and Curing on Carbonation Progress and Pore Structure of Hydrated Cement Pastes","volume":"85","author":"Bier","year":"1986","journal-title":"MRS Proc."},{"key":"ref_47","doi-asserted-by":"crossref","first-page":"515","DOI":"10.1617\/s11527-008-9399-1","article-title":"Chemical changes and phase analysis of OPC pastes carbonated at different CO2 concentrations","volume":"42","author":"Castellote","year":"2008","journal-title":"Mater. Struct."},{"key":"ref_48","unstructured":"Thiel, C., Beddoe, R., Lowke, D., and Gehlen, C. (2014, January 21\u201323). Accelerated carbonation: Changes in water transport, porosity and phases of mortar due to different CO2 pressures. Proceedings of the 10th FIB International PhD Symposium in Civil Engineering, Quebec, QC, Canada."},{"key":"ref_49","unstructured":"Hansen, K.K., Rode, C., and Nilsson, K.-O. (2016, January 22\u201324). Investigating the role of moisture on concrete carbonation using single-sided 1H-NMR. Proceedings of the PRO112: International RILEM Conference on Materials, Systems and Structures in Civil Engineering Conference, Seg-ment on Moisture in Materials and Structures, Lyngby, Denmark."},{"key":"ref_50","unstructured":"Thiel, C., Sch\u00f6n, A., and Gehlen, C. (2018, January 12\u201314). Einfluss der Co2-Permeation auf die Carbonatisierung Zementgebundener Baustoffe. Tagungsband. Proceedings of the IBAUSIL 20th Internationale Baustofftagung, Weimar, Germany."},{"key":"ref_51","unstructured":"Bundesanstalt f\u00fcr Wasserbau (2012). BAW Code of Practice\u2014Resistance of Concrete to Chloride Penetration (MCL), Bundesanstalt f\u00fcr Wasserbau."},{"key":"ref_52","unstructured":"Bundesanstalt f\u00fcr Wasserbau (2012). BAWMerkblatt Dauerhaftigkeitsbemessung und\u2014Bewertung von Stahlbetonbauwerken bei Carbona\u2014Tisierung und Chlorideinwirkung (MDCC), Bundesanstalt f\u00fcr Wasserbau."},{"key":"ref_53","unstructured":"Bundesanstalt f\u00fcr Wasserbau (2017). BAWMerkblatt Dauerhaftigkeitsbemessung und-bewertung von Stahlbetonbauwerken bei Carbona-Tisierung und Chlorideinwirkung (MDCC), Bundesanstalt f\u00fcr Wasserbau."},{"key":"ref_54","unstructured":"(2020, December 14). Dini Engineering. D-shape 3D-Printer DS 12 \u00d7 12 \u00d7 10. Available online: https:\/\/www.d-shape.com\/wp-content\/uploads\/2018\/10\/DS12x12x10.pdf."},{"key":"ref_55","unstructured":"CEN\u2014European Committee for Standardization (2013). EN 206:2013+A1:2016. Concrete\u2014Specification, performance, production and conformity, CEN\u2014European Committee for Standardization."},{"key":"ref_56","unstructured":"Rahimi, A. (2017). Semiprobabilistisches Nachweiskonzept zur Dauerhaftigkeitsbemessung und\u2014Bewertung von Stahlbetonbauteilen unter Chlorideinwirkung, Beuth Verlag."},{"key":"ref_57","first-page":"974","article-title":"Evaluation of Chloride Penetration in OPC Concrete by Silver Nitrate Solution Spray Method","volume":"6","author":"Krishnakumar","year":"2014","journal-title":"Int. J. Chem. Tech Res."},{"key":"ref_58","doi-asserted-by":"crossref","unstructured":"Gehlen, C. (2000). Probabilistische Lebensdauerbemessung von Stahlbetonbauwerken. Zuverl\u00e4ssigkeitsbetrachtungen zur Wirksamen Vermeidung von Bewehrungskorrosion, Beuth Verlag.","DOI":"10.1002\/best.200100570"},{"key":"ref_59","unstructured":"Spiesz, P.R., and Hunger, M. (2017, January 6\u20138). Towards a more common use of Ultra-High Performance Concrete (UHPC)\u2014Development of UHPC for ready-mix and prefabrication concrete plants. Proceedings of the 11th High Performance Concrete conference, Tromso, Norway."},{"key":"ref_60","unstructured":"Scheydt, J.C. (2014). Mechanismen der Korrosion bei Ultrahochfestem Beton, KIT Scientific Publishing."},{"key":"ref_61","doi-asserted-by":"crossref","first-page":"494","DOI":"10.1007\/BF02480474","article-title":"Fresh concrete: A Herschel-Bulkley material","volume":"31","author":"Ferraris","year":"1998","journal-title":"Mater. Struct."},{"key":"ref_62","unstructured":"Steffe, J.F. (1996). Rheological Methods in Food Process Engineering, Freeman Press. [2nd ed.]."},{"key":"ref_63","doi-asserted-by":"crossref","first-page":"41","DOI":"10.1007\/BF02472527","article-title":"Rheological models for cement pastes","volume":"21","author":"Papo","year":"1988","journal-title":"Mater. Struct."},{"key":"ref_64","first-page":"291","article-title":"Konsistenzmessungen von Gummi-Benzoll\u00f6sungen","volume":"39","author":"Herschel","year":"1926","journal-title":"Colloid Polym. Sci."},{"key":"ref_65","unstructured":"Mezger, T.G. (2012). Das Rheologie Handbuch, Vincentz Network. [4th ed.]."},{"key":"ref_66","unstructured":"Lowke, D. (2015). Sedimentationsverhalten und Robustheit Selbstverdichtender Betone, Beuth Verlag."}],"container-title":["Materials"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1996-1944\/14\/3\/586\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T05:16:00Z","timestamp":1760159760000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1996-1944\/14\/3\/586"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,1,27]]},"references-count":66,"journal-issue":{"issue":"3","published-online":{"date-parts":[[2021,2]]}},"alternative-id":["ma14030586"],"URL":"https:\/\/doi.org\/10.3390\/ma14030586","relation":{},"ISSN":["1996-1944"],"issn-type":[{"value":"1996-1944","type":"electronic"}],"subject":[],"published":{"date-parts":[[2021,1,27]]}}}