Discontinuously reinforced aluminum metal matrix composites (MMCs) with about 20 vol.% reinforcement produced by powder metallurgy (PM) are attractive for many structural applications because of their high specific strength and stiffness. While they exhibit reduced ductility and toughness at room temperature, many of them can be superplastically deformed at high-strain rates in the vicinity of ...

Introduction: This review deals with research and scientific perspectives about whether there is any effect linked to particle size structure of one the significant atmospheric pollutants particulate matter (pm) on duration residence in air transport virus causing Covid19, originating China becoming a global pandemic 2020, hence pm may change level effectiveness humans. Discussion: The Covid19 ...

BACKGROUND There are many communities around the world that are exposed to high levels of particulate matter <10 µm (PM₁₀) of geogenic (earth derived) origin. Mineral dusts in the occupational setting are associated with poor lung health, however very little is known about the impact of heterogeneous community derived particles. We have preliminary evidence to suggest that the concentration of ...

Darin besteht das Wesen der Wissenschaft. Zuerst denkt man an etwas, das wahr sein könnte. Dann sieht man nach, ob es der Fall ist und im Allgemeinen ist es nicht der Fall. Summary Claimed as renewable energy source, wood is increasingly used in stoves and boilers for heating purposes in western countries due to economic reasons and environmental consciousness. Consequently, domestic wood combu...

The negative effect of airborne particles on human beings has been widely noticed in recent decades. high particle mass concentrations underground platforms can be a significant public health issue for metro systems. This study monitored PM10, PM2.5, and PM1 field measurement performed from January to December 2020 an platform Stockholm, Sweden. A linear mixed model, named the multi-factor was ...

BACKGROUND Epidemiological studies have shown the associations of ambient temperature and particulate matter (PM) air pollution with respiratory morbidity and mortality. However, the underlying mechanisms have not been well characterized. The aim of this study is to investigate the associations of temperature and fine and coarse PM with fractional exhaled nitric oxide (FeNO), a well-established...

The purpose of this study was to estimate exposure of pregnant women in Poland to fine particulate matter [less than or equal to 2.5 microm in diameter (PM 2.5)] and to assess its effect on the birth outcomes. The cohort consisted of 362 pregnant women who gave birth between 34 and 43 weeks of gestation. The enrollment included only nonsmoking women with singleton pregnancies, 18-35 years of ag...

1885-5857/$ – see front matter 2011 Sociedad Esp doi:10.1016/j.rec.2011.05.006 Numerous epidemiological studies support the association of exposure to air pollution with adverse health effects leading to enhanced morbidity and mortality of considerable significance. In fact, the World Health Organization ranks it as the 13th leading cause of worldwide mortality. Cumulative evidence over the las...