StopUMTS Logo
how to get rid of moles 
Zoeken
   
Voorlichting
21/09/17EHS en toch een smartphon
01/09/17WiFi vrije scholen (kaart
Artikelen
20/09/17IoT 5
20/09/17Harmonische vervorming
20/09/17Vitamin B17: The Greatest
19/09/17Burn-out (toename)
19/09/17Schildklierkanker, toenam
18/09/17What science knows about
Berichten Nederland
28/09/17Nieuw boek: DE DRAADLOZE
21/09/17GGD Utrecht: een nieuw ge
20/09/17Ruimte in de ether voor 5
20/09/17De Impact-Academy en onze
18/09/17Vereniging tegen de Kwakz
Berichten België
01/07/17Verdubbeling burn-out in
26/06/17Voorstel van resolutie vo
Berichten Internationaal
21/09/17USA: Monterey County Proc
20/09/17USA: nieuwe 5G ellende: D
19/09/17USA: De jongeren van nu g
19/09/17USA: 5G opponents launch
Ervaringen | Appellen/oproepen
18/09/17WiFi 2,4 GHz en 5 GHz; ee
18/09/17''Why I Don't Have a Mobi
14/09/173G naar 4G
Onderzoeken
20/09/17National Toxicology Progr
08/09/17Anxiety-like behavioural
07/09/17The mere presence of your
Veel gestelde vragen
13/05/17Vakantie? Witte zo
10/07/16Zeven veel gestelde vrage
Juridische informatie
19/09/17USA situatie: WOZ waarded
10/09/17Rechter: Staat moet lucht
31/08/17InPower Movement: Early r
Oproepen
29/11/17Raadsmarkt ZENDMASTEN &
11/11/17Cursus ‘Straling meten
29/09/17EHS regionale contactdage
Folders
10/06/17Brochures, folders, websi
29/04/16USA: Meer dan 50 tips voo
Briefwisselingen | Archief: 2008, 2005
10/07/17Brief naar de gemeente C.
14/06/17Mail naar 'De Monitor' na
Illustraties
 Algemeen
 Fotoalbum zendmasten
 Wetenschappelijke illustraties
{Magnetite pollution nanoparticles in the human brain}    
Ga naar overzicht berichten in: Onderzoeken

Magnetite pollution nanoparticles in the human brain
dinsdag, 22 november 2016 - Dossier: Algemeen


Bron: www.pnas.org/content/113/39/10797
Proceedings of the National Academy of Sciences of the United States of America
vol. 113 no. 39 > Barbara A. Maher, 10797–10801, doi:
10.1073/pnas.1605941113

Barbara A. Maher a,1, Imad A. M. Ahmed b, Vassil Karloukovskia, Donald A. MacLaren c, Penelope G. Foulds d, David Allsop d, David M. A. Manne, Ricardo Torres-Jardón f, and Lilian Calderon-Garciduenas g, h

a Centre for Environmental Magnetism and Palaeomagnetism, Lancaster Environment Centre, University of Lancaster, Lancaster LA1 4YQ, United Kingdom;
b Department of Earth Sciences, University of Oxford, Oxford OX1 3AN, United Kingdom;
c Scottish Universities Physics Alliance, School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom;
d Division of Biomedical and Life Sciences, Faculty of Health and Medicine, University of Lancaster, Lancaster LA1 4YQ, United Kingdom;
e Division of Neuroscience & Experimental Pyschology, School of Biological Sciences, University of Manchester, Manchester M6 8HD, United Kingdom;
f Centro de Ciencias de la Atmósfera, Universidad Nacional Autónoma de México, Mexico City 04310, Mexico;
g Neurotoxicology Laboratory, The University of Montana, Missoula, MT 59812;
h Universidad del Valle de México, Mexico City, 04850, Mexico

Edited by Yinon Rudich, Weizmann Institute of Science, Rehovot, Israel, and accepted by Editorial Board Member A. R. Ravishankara July 25, 2016 (received for review April 13, 2016)

Significance

We identify the abundant presence in the human brain of magnetite nanoparticles that match precisely the high-temperature magnetite nanospheres, formed by combustion and/or friction-derived heating, which are prolific in urban, airborne particulate matter (PM). Because many of the airborne magnetite pollution particles are <200 nm in diameter, they can enter the brain directly through the olfactory nerve and by crossing the damaged olfactory unit. This discovery is important because nanoscale magnetite can respond to external magnetic fields, and is toxic to the brain, being implicated in production of damaging reactive oxygen species (ROS). Because enhanced ROS production is causally linked to neurodegenerative diseases such as Alzheimer’s disease, exposure to such airborne PM-derived magnetite nanoparticles might need to be examined as a possible hazard to human health.

Abstract
Biologically formed nanoparticles of the strongly magnetic mineral, magnetite, were first detected in the human brain over 20 y ago Kirschvink JL, Kobayashi-Kirschvink A, Woodford BJ (1992) Proc Natl Acad Sci USA 89(16):7683–7687. Magnetite can have potentially large impacts on the brain due to its unique combination of redox activity, surface charge, and strongly magnetic behavior. We used magnetic analyses and electron microscopy to identify the abundant presence in the brain of magnetite nanoparticles that are consistent with high-temperature formation, suggesting, therefore, an external, not internal, source. Comprising a separate nanoparticle population from the euhedral particles ascribed to endogenous sources, these brain magnetites are often found with other transition metal nanoparticles, and they display rounded crystal morphologies and fused surface textures, reflecting crystallization upon cooling from an initially heated, iron-bearing source material. Such high-temperature magnetite nanospheres are ubiquitous and abundant in airborne particulate matter pollution. They arise as combustion-derived, iron-rich particles, often associated with other transition metal particles, which condense and/or oxidize upon airborne release. Those magnetite pollutant particles which are <∼200 nm in diameter can enter the brain directly via the olfactory bulb. Their presence proves that externally sourced iron-bearing nanoparticles, rather than their soluble compounds, can be transported directly into the brain, where they may pose hazard to human health.

brain magnetite magnetite pollution particles Alzheimer's disease combustion-derived nanoparticles airborne particulate matter

De bloed-hersenbarrière geeft hier dus geen bescherming meer en het is bekend dat deze doorlatend wordt bij stralingsbelasting veroorzaakt door draadloze communicatie.
Zie verder:


www.the-scientist.com/?articles.view/articleNo/46968/title/Environmental-Magnetite-in-the-Human-Brain/
www.sciencemag.org/news/2016/09/industrial-air-pollution-leaves-magnetic-waste-brain
www.ncbi.nlm.nih.gov/pubmedhealth/behindtheheadlines/news/2016-09-07-pollution-particles-in-the-brain-linked-to-alzheimers-disease/ .


Ga terug naar het hoofdmenu
Afdrukken | Vragen | RSS | Disclaimer