{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T03:39:23Z","timestamp":1760240363873,"version":"build-2065373602"},"reference-count":67,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2019,5,23]],"date-time":"2019-05-23T00:00:00Z","timestamp":1558569600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001871","name":"Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia","doi-asserted-by":"publisher","award":["EXPL\/CTM-CER\/0637\/2012"],"award-info":[{"award-number":["EXPL\/CTM-CER\/0637\/2012"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Minerals"],"abstract":"<jats:p>Technical ceramics are being widely employed in the electric power, medical and engineering industries because of their thermal and mechanical properties, as well as their high resistance qualities. The manufacture of technical ceramic components involves complex processes, including milling and stirring of raw materials in aqueous solutions, spray drying and dry pressing. In general, the spray-dried powders exhibit an important degree of variability in their performance when subjected to dry-pressing, which affects the efficiency of the manufacturing process. Commercial additives, such as deflocculants, biocides, antifoam agents, binders, lubricants and plasticizers are thus applied to ceramic slips. Several bacterial and fungal species naturally occurring in ceramic raw materials, such as Sphingomonas, Aspergillus and Aureobasidium, are known to produce exopolysaccharides. These extracellular polymeric substances (EPS) may confer unique and potentially interesting properties on ceramic slips, including viscosity control, gelation, and flocculation. In this study, the microbial communities present in clay raw materials were identified by both culture methods and DNA-based analyses to select potential EPS producers based on the scientific literature for further assays based on the use of EPS for enhancing the performance of technical ceramics. Potential exopolysaccharide producers were identified in all samples, such as Sphingomonas sp., Pseudomonas xanthomarina, P. stutzeri, P. koreensis, Acinetobacter lwoffi, Bacillus altitudinis and Micrococcus luteus, among bacteria. Five fungi (Penicillium citrinum, Aspergillus niger, Fusarium oxysporum, Acremonium persicinum and Rhodotorula mucilaginosa) were also identified as potential EPS producers.<\/jats:p>","DOI":"10.3390\/min9050316","type":"journal-article","created":{"date-parts":[[2019,5,24]],"date-time":"2019-05-24T02:22:00Z","timestamp":1558664520000},"page":"316","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Characterization of Microbial Communities Associated with Ceramic Raw Materials as Potential Contributors for the Improvement of Ceramic Rheological Properties"],"prefix":"10.3390","volume":"9","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2798-0542","authenticated-orcid":false,"given":"Angela M.","family":"Garcia-Sanchez","sequence":"first","affiliation":[{"name":"Department of Microbiology and Parasitology, Faculty of Pharmacy, University of Seville, Profesor Garc\u00eda Gonz\u00e1lez 2, 41012 Seville, Spain"}]},{"given":"Bernardino","family":"Machado-Moreira","sequence":"additional","affiliation":[{"name":"CERENA, Instituto Superior T\u00e9cnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal"}]},{"given":"M\u00e1rio","family":"Freire","sequence":"additional","affiliation":[{"name":"Laboratorio de An\u00e1lises do Instituto Superior T\u00e9cnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal"}]},{"given":"Ricardo","family":"Santos","sequence":"additional","affiliation":[{"name":"Laboratorio de An\u00e1lises do Instituto Superior T\u00e9cnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9943-0742","authenticated-orcid":false,"given":"S\u00edlvia","family":"Monteiro","sequence":"additional","affiliation":[{"name":"Laboratorio de An\u00e1lises do Instituto Superior T\u00e9cnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal"}]},{"given":"Diamantino","family":"Dias","sequence":"additional","affiliation":[{"name":"Rauschert Portuguesa, SA., Estrada Nacional 249-4, Trajouce, 2785-653 S\u00e3o Domingos de Rana, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7164-5525","authenticated-orcid":false,"given":"Orqu\u00eddia","family":"Neves","sequence":"additional","affiliation":[{"name":"CERENA, Instituto Superior T\u00e9cnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal"}]},{"given":"Am\u00e9lia","family":"Dion\u00edsio","sequence":"additional","affiliation":[{"name":"CERENA, Instituto Superior T\u00e9cnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0553-8470","authenticated-orcid":false,"given":"Ana Z.","family":"Miller","sequence":"additional","affiliation":[{"name":"Instituto de Recursos Naturales y Agrobiologia de Sevilla (IRNAS-CSIC), Av. Reina Mercedes 10, 41012 Sevilla, Spain"},{"name":"HERCULES Laboratory, University of \u00c9vora, Largo Marqu\u00eas de Marialva 8, 7000-809 \u00c9vora, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2019,5,23]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1421","DOI":"10.1016\/j.jeurceramsoc.2007.12.015","article-title":"Seventy ways to make ceramics","volume":"28","author":"Evans","year":"2008","journal-title":"J. Eur. Ceram. Soc."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"9","DOI":"10.2166\/wst.2001.0328","article-title":"Relevance of microbial extracellular polymeric substances (EPSs)-Part II: Technical aspects","volume":"43","author":"Flemming","year":"2001","journal-title":"Water Sci. 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