Abstract:
:Surface IR (infrared) modes of crystalline and fumed (amorphous) silica particles, calcined at temperatures up to 1095 degrees C, have been studied by Fourier transform infrared spectroscopy. The ability of these same particles to lyse cells has been measured by a hemolysis protocol. The untreated crystalline and amorphous materials differ by a factor of 40 in specific surface area, and the intensity per unit mass of the sharp surface silanol band near 3745 cm-1 in the amorphous material is an order of magnitude larger than in the crystalline material. A similar difference is observed in the lysing potential of the two materials. The intensity of the silanol band increases after calcination for both materials, reaching peak values near 500 degrees C, followed by a dramatic drop at higher calcination temperatures, and reaching negligible values for materials calcined near 1100 degrees C. The lysing potential data follow essentially the same pattern for both crystalline and fumed silica. These results are consistent with the hypothesis that the surface silanol groups are involved in cell lysis. Further experiments are suggested to evaluate the relationship between the surface structure of silica particles and their potential cytotoxicity.
journal_name
Environ Health Perspectjournal_title
Environmental health perspectivesauthors
Pandurangi RS,Seehra MS,Razzaboni BL,Bolsaitis Pdoi
10.1289/ehp.9086327subject
Has Abstractpub_date
1990-06-01 00:00:00pages
327-36eissn
0091-6765issn
1552-9924journal_volume
86pub_type
杂志文章abstract:BACKGROUND:Humans have been exposed to fine and ultrafine particles throughout their history. Since the Industrial Revolution, sources, doses, and types of nanoparticles have changed dramatically. In the last decade, the rapidly developing field of nanotechnology has led to an increase of engineered nanoparticles with ...
journal_title:Environmental health perspectives
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更新日期:2011-08-01 00:00:00
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journal_title:Environmental health perspectives
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pub_type: 杂志文章
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更新日期:2012-01-01 00:00:00
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更新日期:1995-03-01 00:00:00
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更新日期:2005-01-01 00:00:00
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更新日期:2017-07-05 00:00:00
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journal_title:Environmental health perspectives
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更新日期:1983-10-01 00:00:00
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更新日期:2006-09-01 00:00:00
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pub_type: 杂志文章,评审
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更新日期:1998-12-01 00:00:00
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更新日期:1993-03-01 00:00:00
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journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.772179
更新日期:1977-12-01 00:00:00
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journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.834733
更新日期:1983-01-01 00:00:00
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更新日期:1999-11-01 00:00:00
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更新日期:1978-12-01 00:00:00
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更新日期:2008-03-01 00:00:00
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pub_type: 杂志文章,meta分析,评审
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更新日期:2014-09-01 00:00:00
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更新日期:1991-06-01 00:00:00
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更新日期:2009-05-01 00:00:00
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journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
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更新日期:1994-06-01 00:00:00
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更新日期:2005-03-01 00:00:00
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journal_title:Environmental health perspectives
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doi:10.1289/ehp.99107539
更新日期:1999-07-01 00:00:00
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pub_type: 杂志文章
doi:10.1289/ehp.101-1521140
更新日期:1993-10-01 00:00:00
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更新日期:1985-02-01 00:00:00