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Abstract

Manmade nanoparticles range from the well-established multi-ton production of carbon black and fumed silica for applications in plastic fillers and car tyres to microgram quantities of fluorescent quantum dots used as markers in biological imaging. As nano-sciences are experiencing massive investment worldwide, there will be a further rise in consumer products relying on nanotechnology. While benefits of nanotechnology are widely publicised, the discussion of the potential effects of their widespread use in the consumer and industrial products are just beginning to emerge. This review provides comprehensive analysis of data available on health effects of nanomaterials.

The exposure to coarse, fine and ultrafine particle emissions from concrete mixing, drilling and cutting activities

“…Online link: http://dx.doi.org/10. 1016/j.jhazmat.2014.07.003 particles can penetrate deeper into the respiratory system increasing the potential to adversely affect health [5]. Some studies have speculated that when considering exposure to ultrafine particles, the PNC is a more important exposure metric than any particle mass-based metric [6].…”

“…There is substantial epidemiological and toxicological evidence to suggest that it is important to evaluate the influence of both particle number concentrations (PNCs) and particle mass concentrations (PMCs) on human health [3,4]. Particle size is important as smaller particles can penetrate deeper into the respiratory system increasing the potential to adversely affect health [5]. Some studies have speculated that when considering exposure to ultrafine particles, the PNC is a more important exposure metric than any particle mass-based metric [6].…”

“…[5][6][7][8][9][10], fine (PM2.5), very fine (PM1) and ultrafine particles. The manufacture of fresh concrete typically involves the mixing of coarse and fine aggregates with cement, water and admixtures in a rotating drum mixer generating considerable air-borne dust [7].…”

“…The average mass concentration of PM2. 5 This study has presented hitherto missing information concerning the potential for concrete mixing, drilling and cutting activities to produce ultrafine particles in significant quantities. Further work now needs to be carried out to compare the results of these laboratory based studies with data from real industrial sites and establish the exposure levels that can occur for those carrying out such activities, and those that live or work adjacent to such sites.…”

Potential Ameliorative Role of N-Acetylcysteine Against Testicular Dysfunction Induced by Titanium Dioxide in Male Albino Rats

“…The rate of cellular damage and oxidative stress of nanoparticles are attributed to the particle size and chemical composition (Hoet et al, 2004). The smaller Science Publications AJPT the particles of TiO2, the more reactivity, effectivity and toxicity (Oberdorster, 2006).…”