scholarly journals Relationship between Indoor High Frequency Size Distribution of Ultrafine Particles and Their Metrics in a University Site

2021 ◽  
Vol 13 (10) ◽  
pp. 5504
Author(s):  
Fabio Boccuni ◽  
Riccardo Ferrante ◽  
Francesca Tombolini ◽  
Sergio Iavicoli ◽  
Armando Pelliccioni
Keyword(s):  
Size Distribution ◽  
Health Effects ◽  
High Frequency ◽  
Ultrafine Particles ◽  
Anthropogenic Activities ◽  
Particle Diameter ◽  
Chemical Properties ◽  
Early Morning ◽  
Adverse Health Effects ◽  
Adverse Health

Exposure to ultrafine particles (UFPs size < 100 nm) in life and work environments can contribute to adverse health effects also in terms of health burden of related diseases over time. The choice of parameters which better characterize UFPs is challenging, due to their physical-chemical properties and their variable size. It is also strictly related to the availability of different instrumental techniques. In the present study we focus on real time high frequency (1 Hz) UFPs particle size distribution (PSD) and their relationship with total particle number concentration (TPNC) and mean particle diameter (Davg) as a contribution characterizing by size the human exposure to UFPs in an indoor site of the University of Rome “Sapienza” (Italy). Further considerations about UFPs contribution to nucleation mode (NM) and accumulation mode (AM) have been highlighted, also in order to investigate the contribution of polycyclic aromatic hydrocarbons (PAHs) surface-adsorbed on indoor air particles (pPAHs). High indoor TPNC values were registered during the rush hours (early morning and mid/late afternoon) according to the outdoor influences originated from anthropogenic activities. AM mainly contribute to the indoor TPNC during working days showing high correlation with pPAHs. These findings may provide useful indications in terms of occupational exposure to UFPs since there are many evidences that indoor exposures to such pollutants may be associated with adverse health effects also in working environments.

scholarly journals Impact of Carcinogenic Chromium on the Cellular Response to Proteotoxic Stress

2019 ◽  
Vol 20 (19) ◽  
pp. 4901 ◽  
Author(s):  
Leonardo M. R. Ferreira ◽  
Teresa Cunha-Oliveira ◽  
Margarida C. Sobral ◽  
Patrícia L. Abreu ◽  
Maria Carmen Alpoim ◽  
...  
Keyword(s):  
Stress Response ◽  
Health Effects ◽  
Cellular Response ◽  
Molecular Mechanisms ◽  
Critical Role ◽  
Chemical Properties ◽  
Adverse Health Effects ◽  
Proteotoxic Stress ◽  
Adverse Health ◽  
The Impact

Worldwide, several million workers are employed in the various chromium (Cr) industries. These workers may suffer from a variety of adverse health effects produced by dusts, mists and fumes containing Cr in the hexavalent oxidation state, Cr(VI). Of major importance, occupational exposure to Cr(VI) compounds has been firmly associated with the development of lung cancer. Counterintuitively, Cr(VI) is mostly unreactive towards most biomolecules, including nucleic acids. However, its intracellular reduction produces several species that react extensively with biomolecules. The diversity and chemical versatility of these species add great complexity to the study of the molecular mechanisms underlying Cr(VI) toxicity and carcinogenicity. As a consequence, these mechanisms are still poorly understood, in spite of intensive research efforts. Here, we discuss the impact of Cr(VI) on the stress response—an intricate cellular system against proteotoxic stress which is increasingly viewed as playing a critical role in carcinogenesis. This discussion is preceded by information regarding applications, chemical properties and adverse health effects of Cr(VI). A summary of our current understanding of cancer initiation, promotion and progression is also provided, followed by a brief description of the stress response and its links to cancer and by an overview of potential molecular mechanisms of Cr(VI) carcinogenicity.

Beyond PM2.5: The role of ultrafine particles on adverse health effects of air pollution

2016 ◽  
Vol 1860 (12) ◽  
pp. 2844-2855 ◽  
Author(s):  
Rui Chen ◽  
Bin Hu ◽  
Ying Liu ◽  
Jianxun Xu ◽  
Guosheng Yang ◽  
...  
Keyword(s):  
Air Pollution ◽  
Health Effects ◽  
Ultrafine Particles ◽  
Adverse Health Effects ◽  
Adverse Health

scholarly journals Study protocol for a randomised controlled trial examining the effect of blood and plasma donation on serum perfluoroalkyl and polyfluoroalkyl substance (PFAS) levels in firefighters

BMJ Open ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. e044833
Author(s):  
Gabriel Silver ◽  
Yordanka Krastev ◽  
Miriam K Forbes ◽  
Brenton Hamdorf ◽  
Barry Lewis ◽  
...  
Keyword(s):  
Randomised Controlled Trial ◽  
Health Effects ◽  
Whole Blood ◽  
Sulfonic Acid ◽  
Controlled Trial ◽  
Adverse Health Effects ◽  
Plasma Donation ◽  
Adverse Health ◽  
Study Results ◽  
Randomised Controlled

IntroductionPerfluoroalkyl and polyfluoroalkyl substances (PFAS) are a diverse group of compounds that have been used in hundreds of industrial applications and consumer products including aqueous film-forming foam (AFFF) for many years. Multiple national and international health and environmental agencies have accepted that PFAS exposures are associated with numerous adverse health effects. Australian firefighters have been shown to have elevated levels of PFAS in their blood, specifically perfluorooctane sulfonic acid (PFOS) and perfluorohexane sulfonic acid (PFHxS), due to the historical use of AFFF. While PFAS concentrations decline over time once the source of exposure has been removed, their potential adverse health effects are such that it would be prudent to develop an intervention to lower levels at a faster rate than occurs via natural elimination rates.Methods and analysisThis is a randomised controlled trial of current and former Australian firefighters in the Metropolitan Fire Brigade/Fire Rescue Victoria, and contractors, with previous occupational exposure to PFAS and baseline elevated PFOS levels. The study is investigating whether whole blood donation every 12 weeks or plasma donation every 6 weeks will significantly reduce PFAS levels, compared with a control group. We have used covariate-adaptive randomisation to balance participants’ sex and blood PFAS levels between the three groups and would consider a 25% reduction in serum PFOS and PFHxS levels to be potentially clinically significant after 12 months of whole blood or plasma donation. A secondary analysis of health biomarkers is being made of changes between screening and week 52 in all three groups.Ethics and disseminationThis trial has been approved by Macquarie University Human Research Ethics Committee (reference number: 3855), final protocol V.2 dated 12 June 2019. Study results will be disseminated via peer-reviewed publications and presentations at conferences.Trial registration numberAustralian New Zealand Clinical Trials Registry (ACTRN12619000204145).

Disrupting the Flow of Perception-Action through Design

2021 ◽  
pp. 105971232198909
Author(s):  
Harry Heft
Keyword(s):  
Cultural History ◽  
Health Effects ◽  
Sense Of Place ◽  
Attentional Focus ◽  
Good Design ◽  
Adverse Health Effects ◽  
Adverse Health ◽  
Directed Action ◽  
Perception Action

It is usually a mark of good design when technologies and tools that mediate goal-directed action are such that the user’s attentional focus is maintained on the intended ends of action rather than on the technologies and tools themselves. When the mediators become the focus, the continuity of goal-directed action is disrupted, and the flow of action can be re-directed. What then is the purpose of the projects designed by the RAAAF studio, as described by Rietveld, which seem to be intended to do both? Disruption of the continuity of goal-directed perception-action may prompt reflection about the circumstances at work, and in so doing provoke a transformation in habitual patterns of action and of thought. The project “The End of Sitting” is intended to remediate the adverse health effects of standard chair-dominated offices through an unconventional office landscape that prompts intermittent postural readjustments, boosting the levels of activity common in such settings. The project “Bunker 599” demonstrates that seemingly unremarkable features of the landscape can sometimes conceal aspects of culture’s history, and that design can function to draw attention to a hidden and even vanishing history. Design can enrich an individual’s sense of place in a stream of cultural history.

Adverse Health Effects at a Tennessee Hazardous Waste Disposal Site

1984 ◽  
Vol 1 (2) ◽  
pp. 183-204 ◽  
Author(s):  
ROBERT H. HARRIS ◽  
JOSEPH H. HIGHLAND ◽  
JOSEPH V. RODRICKS ◽  
STAVROS S. PAPADOPULOS
Keyword(s):  
Health Effects ◽  
Hazardous Waste ◽  
Waste Disposal ◽  
Disposal Site ◽  
Waste Disposal Site ◽  
Adverse Health Effects ◽  
Hazardous Waste Disposal ◽  
Adverse Health

The adverse health effects associated with drought in Africa

2021 ◽  
pp. 148500
Author(s):  
Taherah Asmall ◽  
Amber Abrams ◽  
Martin Röösli ◽  
Guéladio Cissé ◽  
Kirsty Carden ◽  
...  
Keyword(s):  
Health Effects ◽  
Adverse Health Effects ◽  
Adverse Health
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