Advanced gas sensors fabricated with nanoparticles and thin films of semiconductor metal oxides have been widely used for the detection toxic, hazardous, combustible gases as biomarkers safety human beings, environmental control, breath analysis [...]

11 Most mass extinctions during the last 500 m.y. coincide with eruptions of large igneous 12 provinces (LIP): the Cretaceous-Tertiary extinction was synchronous with the Deccan 13 flood volcanism, Permian-Triassic extinction with the eruption of the enormous 14 Siberian Traps, and End-Guadalupian extinction with the Emeishan volcanic province. 15 The causal link remains disputed, however, and ...

T he lung is highly exposed to the external environment and must cope with a number of challenges from inhaled particles, toxic gases and invading microorganisms. Defence against these external injuries depends on various mechanisms (antioxidants, antiproteases and the immune response), and an efficient system for removing and replacing apoptotic cells. Failure to cope with external injury may ...

Nitric oxide (NO) gas is known as both a vasodilator and a toxin. It can react with oxygen to form compounds more toxic than itself, such as nitrogen dioxide (NO2). The reactions are time dependent; thus, infusing NO into breathing circuits as close to ventilated subjects as possible may help minimize toxic byproduct exposure. Unfortunately, flow rates commonly used with mechanical ventilation ...

If you saw a low-lying cloud that was labeled clearly with its contents, and the label contained the words benzene, carbon monoxide, formaldehyde, hydrogen cyanide, methane, phenol, styrene, and toluene, would you go out of your way to walk through that cloud and inhale those toxic chemicals? Of course not. But you expose yourself to these same toxic chemicals each time you participate in a sur...

New labelling processes installed without adequate ventilation control in an electric motor factory exposed production line workers to toxic gases. Symptoms of eye and respiratory tract irritation together with complaints of headache, fever, chills, dizziness, malaise, general weakness, nausea, and vomiting were widespread. Chest signs, radiographic abnormalities, reduction in ventilatory funct...

We describe the case of a 58 year old male, who developed a reactive airways dysfunction syndrome (RADS) after exposure to a high level of toxic gases in a swine confinement building. This previously healthy, nonatopic man developed moderate, partially reversible, airway obstruction and increased responsiveness within a month after the toxic exposure. The circumstances of the incident and the c...

Medical establishments play important roles in different activities by using of modern technology to serve the humans and the environment through different departments in the establishment and its firms. Medical wastes are considered as a hazardous waste because they contain toxic materials, infectious, or non-infectious wastes and they are considered as a hazard to millions of patients, health...