{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,25]],"date-time":"2025-10-25T11:47:07Z","timestamp":1761392827241},"reference-count":28,"publisher":"Elsevier BV","issue":"2-3","license":[{"start":{"date-parts":[[2001,2,1]],"date-time":"2001-02-01T00:00:00Z","timestamp":980985600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/tdm\/userlicense\/1.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Journal of Non-Crystalline Solids"],"published-print":{"date-parts":[[2001,2]]},"DOI":"10.1016\/s0022-3093(00)00405-1","type":"journal-article","created":{"date-parts":[[2002,7,25]],"date-time":"2002-07-25T19:47:13Z","timestamp":1027626433000},"page":"196-203","source":"Crossref","is-referenced-by-count":7,"title":["Positronium study of porous structure of sol\u2013gel prepared SiO2: influence of pH"],"prefix":"10.1016","volume":"279","author":[{"given":"M.","family":"Misheva","sequence":"first","affiliation":[]},{"given":"N.","family":"Djourelov","sequence":"additional","affiliation":[]},{"given":"F.M.A.","family":"Margaca","sequence":"additional","affiliation":[]},{"given":"I.M.","family":"Miranda Salvado","sequence":"additional","affiliation":[]}],"member":"78","reference":[{"key":"10.1016\/S0022-3093(00)00405-1_BIB1","doi-asserted-by":"crossref","first-page":"1739","DOI":"10.1351\/pac199466081739","volume":"66","author":"Rouquerol","year":"1994","journal-title":"Pure Appl. Chem."},{"key":"10.1016\/S0022-3093(00)00405-1_BIB2","doi-asserted-by":"crossref","first-page":"301","DOI":"10.1016\/0022-3093(85)90103-6","volume":"70","author":"Brinker","year":"1985","journal-title":"J. Non-Cryst. Solids"},{"key":"10.1016\/S0022-3093(00)00405-1_BIB3","first-page":"97","volume":"58","author":"Beier","year":"1985","journal-title":"Glastech. Ber."},{"key":"10.1016\/S0022-3093(00)00405-1_BIB4","doi-asserted-by":"crossref","first-page":"59","DOI":"10.4028\/www.scientific.net\/MSF.175-178.59","volume":"175\u2013178","author":"Jean","year":"1995","journal-title":"Mater. Sci. Forum"},{"key":"10.1016\/S0022-3093(00)00405-1_BIB5","doi-asserted-by":"crossref","first-page":"4902","DOI":"10.1063\/1.1674769","volume":"54","author":"Chuang","year":"1971","journal-title":"J. Chem. Phys."},{"key":"10.1016\/S0022-3093(00)00405-1_BIB6","doi-asserted-by":"crossref","first-page":"653","DOI":"10.1557\/PROC-121-653","volume":"121","author":"Zerda","year":"1988","journal-title":"Mat. Res. Soc. Symp. Proc."},{"key":"10.1016\/S0022-3093(00)00405-1_BIB7","doi-asserted-by":"crossref","first-page":"143","DOI":"10.1016\/0022-3093(90)90120-B","volume":"121","author":"Nogami","year":"1990","journal-title":"J. Non-Cryst. Solids"},{"key":"10.1016\/S0022-3093(00)00405-1_BIB8","doi-asserted-by":"crossref","first-page":"296","DOI":"10.4028\/www.scientific.net\/MSF.255-257.296","volume":"255\u2013257","author":"Goworek","year":"1997","journal-title":"Mater. Sci. Forum"},{"key":"10.1016\/S0022-3093(00)00405-1_BIB9","doi-asserted-by":"crossref","first-page":"357","DOI":"10.4028\/www.scientific.net\/MSF.255-257.357","volume":"255\u2013257","author":"Wakabayashi","year":"1997","journal-title":"Mater. Sci. Forum"},{"key":"10.1016\/S0022-3093(00)00405-1_BIB10","doi-asserted-by":"crossref","first-page":"R5157","DOI":"10.1103\/PhysRevB.60.R5157","volume":"60","author":"Gidley","year":"1999","journal-title":"Phys. Rev. B"},{"key":"10.1016\/S0022-3093(00)00405-1_BIB11","doi-asserted-by":"crossref","first-page":"51","DOI":"10.1016\/0301-0104(81)80307-2","volume":"63","author":"Eldrup","year":"1981","journal-title":"Chem. Phys."},{"key":"10.1016\/S0022-3093(00)00405-1_BIB12","unstructured":"H. Nakanishi, S.J. Wang, Y.C. Jean, in: S.C. Sharma (Ed.), Positron Annihilation Study of Fluids, World Scientific, Singapore, 1987, p. 292"},{"key":"10.1016\/S0022-3093(00)00405-1_BIB13","doi-asserted-by":"crossref","first-page":"5756","DOI":"10.1021\/ma960085h","volume":"29","author":"Jean","year":"1996","journal-title":"Macromolecules"},{"key":"10.1016\/S0022-3093(00)00405-1_BIB14","doi-asserted-by":"crossref","first-page":"5499","DOI":"10.1063\/1.1677067","volume":"56","author":"Tao","year":"1972","journal-title":"J. Chem. Phys."},{"key":"10.1016\/S0022-3093(00)00405-1_BIB15","first-page":"2081","volume":"8","author":"Djourelov","year":"1996","journal-title":"J. Phys."},{"key":"10.1016\/S0022-3093(00)00405-1_BIB16","unstructured":"P. Kirkegaard, N.J. Pedersen, M. Eldrup, PATFIT-88 (1989) Riso-M-2740"},{"key":"10.1016\/S0022-3093(00)00405-1_BIB17","doi-asserted-by":"crossref","first-page":"4665","DOI":"10.1063\/1.349057","volume":"70","author":"Gregory","year":"1991","journal-title":"J. Appl. Phys."},{"key":"10.1016\/S0022-3093(00)00405-1_BIB18","doi-asserted-by":"crossref","first-page":"229","DOI":"10.1016\/0010-4655(82)90174-6","volume":"27","author":"Provencher","year":"1982","journal-title":"Comp. Phys. Commun."},{"key":"10.1016\/S0022-3093(00)00405-1_BIB19","doi-asserted-by":"crossref","first-page":"172","DOI":"10.1016\/0168-9002(90)90358-D","volume":"290","author":"Gregory","year":"1990","journal-title":"Nucl. Instr. Meth. A"},{"key":"10.1016\/S0022-3093(00)00405-1_BIB20","doi-asserted-by":"crossref","first-page":"365","DOI":"10.1007\/BF00882612","volume":"13","author":"Campbell","year":"1977","journal-title":"Appl. Phys."},{"key":"10.1016\/S0022-3093(00)00405-1_BIB21","doi-asserted-by":"crossref","first-page":"70","DOI":"10.1016\/S0022-3093(99)00514-1","volume":"258","author":"Margaca","year":"1999","journal-title":"J. Non-Cryst. Solids"},{"key":"10.1016\/S0022-3093(00)00405-1_BIB22","doi-asserted-by":"crossref","first-page":"415","DOI":"10.1016\/0022-3093(85)90043-2","volume":"69","author":"Nogami","year":"1985","journal-title":"J. Non-Cryst. Solids"},{"key":"10.1016\/S0022-3093(00)00405-1_BIB23","doi-asserted-by":"crossref","first-page":"2131","DOI":"10.1051\/jphys:0198700480120213100","volume":"48","author":"Cabane","year":"1987","journal-title":"J. Phys."},{"key":"10.1016\/S0022-3093(00)00405-1_BIB24","doi-asserted-by":"crossref","first-page":"185","DOI":"10.1016\/S0022-3093(86)80078-3","volume":"87","author":"Pope","year":"1986","journal-title":"J. Non-Cryst. Solids"},{"key":"10.1016\/S0022-3093(00)00405-1_BIB25","unstructured":"L.C. Klein, R.H. Woodman, in: E.J.A. Pope, S. Sakka, L.C. Klein (Eds.), Ten Years of Silica Gels from TEOS, Ceramic Transactions, Am. Ceram. Soc., OH, 1995, p. 105"},{"key":"10.1016\/S0022-3093(00)00405-1_BIB26","doi-asserted-by":"crossref","first-page":"1380","DOI":"10.1063\/1.111994","volume":"64","author":"Liszkay","year":"1994","journal-title":"Appl. Phys. Lett."},{"key":"10.1016\/S0022-3093(00)00405-1_BIB27","doi-asserted-by":"crossref","first-page":"6313","DOI":"10.1088\/0953-8984\/8\/34\/018","volume":"8","author":"Misheva","year":"1996","journal-title":"J. Phys. Cond. Matter"},{"key":"10.1016\/S0022-3093(00)00405-1_BIB28","doi-asserted-by":"crossref","first-page":"209","DOI":"10.1016\/S0022-3093(00)00153-8","volume":"272","author":"Misheva","year":"2000","journal-title":"J. Non-Cryst. Solids"}],"container-title":["Journal of Non-Crystalline Solids"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S0022309300004051?httpAccept=text\/xml","content-type":"text\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S0022309300004051?httpAccept=text\/plain","content-type":"text\/plain","content-version":"vor","intended-application":"text-mining"}],"deposited":{"date-parts":[[2019,4,22]],"date-time":"2019-04-22T07:51:35Z","timestamp":1555919495000},"score":1,"resource":{"primary":{"URL":"https:\/\/linkinghub.elsevier.com\/retrieve\/pii\/S0022309300004051"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2001,2]]},"references-count":28,"journal-issue":{"issue":"2-3","published-print":{"date-parts":[[2001,2]]}},"alternative-id":["S0022309300004051"],"URL":"https:\/\/doi.org\/10.1016\/s0022-3093(00)00405-1","relation":{},"ISSN":["0022-3093"],"issn-type":[{"value":"0022-3093","type":"print"}],"subject":[],"published":{"date-parts":[[2001,2]]}}}