Particle and organic vapor emissions from children’s 3-D pen and 3-D printer toys
نویسندگان
چکیده
منابع مشابه
Safety Standards Aim to Rein in 3-D Printer Emissions
By depositing molten plastic layer upon layer, threedimensional (3-D) printers can crank out almost anything, from toys to guns to artificial limbs. The surging 3-D printer market has made desktop versions affordable for schools and libraries. But the printers’ growing prevalence has raised concerns about potential negative health effects from inhaling toxic volatile organic compounds (VOCs) an...
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3-D printing is an additive manufacturing process involving the injection of melted thermoplastic polymers, which are then laid down in layers to achieve a pre-designed shape. The heated deposition process raises concerns of potential aerosol and volatile organic compounds (VOC) emission and exposure. The decreasing cost of desktop 3-D printers has made the use of 3-D printers more acceptable i...
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In this paper, we present a new intensity based technique for recovering depth information from two or more images. Our method uses planar patches to approximate 3-D surfaces. In order to recover the depth information, the view-line constraint and the imaging geometry are introduced. The view-line constraint is used to restrict the position of a planar patch. From the constraint we can get the ...
متن کاملphthalein /3-D-glucuronide, p-nitrophenyl N-acetyl-/3-D-glucosaminide, p-nitrophenyl /3-D-fucoside, p- nitrophenyl /3-D-galactoside and 6-bromo-2-naphthyl /3-D-galactopyranoside from Sigma Chemical CO.(U.S.A..), phenyl /3-D-galactopyranoside from Nakarai
p-Hydroxyphenylacetaldoxime (HPAAO) (anti and syn forms) obtained by fermentation arid its analogs chemically synthesized were tested for their activities to inhibit various glycosidases. HPAAO inhibited bovine liver /3-galactosidase in a competitive manner at pH 17.0 with an apparent Ki value of 8 x 10-8 M. HPAAO also inhibited various mammalian /3.glycosidases which had pH optima between 6.0 ...
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ژورنال
عنوان ژورنال: Inhalation Toxicology
سال: 2019
ISSN: 0895-8378,1091-7691
DOI: 10.1080/08958378.2019.1705441