{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,31]],"date-time":"2026-08-31T11:03:41Z","timestamp":1788174221811,"version":"build-2803163510"},"reference-count":57,"publisher":"MDPI AG","issue":"13","license":[{"start":{"date-parts":[[2021,6,29]],"date-time":"2021-06-29T00:00:00Z","timestamp":1624924800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100003569","name":"Ministry of Food and Drug Safety","doi-asserted-by":"publisher","award":["20182MFDS404"],"award-info":[{"award-number":["20182MFDS404"]}],"id":[{"id":"10.13039\/501100003569","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100003725","name":"National Research Foundation of Korea","doi-asserted-by":"publisher","award":["2021R1A2C2007192"],"award-info":[{"award-number":["2021R1A2C2007192"]}],"id":[{"id":"10.13039\/501100003725","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Seoul Women\u2019s University","award":["2021-0164"],"award-info":[{"award-number":["2021-0164"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJMS"],"abstract":"<jats:p>Food additive amorphous silicon dioxide (SiO2) particles are manufactured by two different methods\u2014precipitated and fumed procedures\u2014which can induce different physicochemical properties and biological fates. In this study, precipitated and fumed SiO2 particles were characterized in terms of constituent particle size, hydrodynamic diameter, zeta potential, surface area, and solubility. Their fates in intestinal cells, intestinal barriers, and tissues after oral administration in rats were determined by optimizing Triton X-114-based cloud point extraction (CPE). The results demonstrate that the constituent particle sizes of precipitated and fumed SiO2 particles were similar, but their aggregate states differed from biofluid types, which also affect dissolution properties. Significantly higher cellular uptake, intestinal transport amount, and tissue accumulation of precipitated SiO2 than of fumed SiO2 was found. The intracellular fates of both types of particles in intestinal cells were primarily particle forms, but slowly decomposed into ions during intestinal transport and after distribution in the liver, and completely dissolved in the bloodstream and kidneys. These findings will provide crucial information for understanding and predicting the potential toxicity of food additive SiO2 after oral intake.<\/jats:p>","DOI":"10.3390\/ijms22137035","type":"journal-article","created":{"date-parts":[[2021,6,29]],"date-time":"2021-06-29T10:52:46Z","timestamp":1624963966000},"page":"7035","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":19,"title":["Determination of Two Differently Manufactured Silicon Dioxide Nanoparticles by Cloud Point Extraction Approach in Intestinal Cells, Intestinal Barriers and Tissues"],"prefix":"10.3390","volume":"22","author":[{"given":"Na-Kyung","family":"Yoo","sequence":"first","affiliation":[{"name":"Division of Applied Food System, Major of Food Science & Technology, Seoul Women\u2019s University, Seoul 01797, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ye-Rin","family":"Jeon","sequence":"additional","affiliation":[{"name":"Division of Applied Food System, Major of Food Science & Technology, Seoul Women\u2019s University, Seoul 01797, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5131-8156","authenticated-orcid":false,"given":"Soo-Jin","family":"Choi","sequence":"additional","affiliation":[{"name":"Division of Applied Food System, Major of Food Science & Technology, Seoul Women\u2019s University, Seoul 01797, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2021,6,29]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"393","DOI":"10.3109\/17435390.2010.519836","article-title":"Presence and risks of nanosilica in food products","volume":"5","author":"Dekkers","year":"2011","journal-title":"Nanotoxicology"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"2885","DOI":"10.1007\/s00204-016-1850-4","article-title":"The safety of nanostructured synthetic amorphous silica (SAS) as a food additive (E 551)","volume":"90","year":"2016","journal-title":"Arch. 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