Deep beneath the barren landscape of Antarctica lies secrets to the climatic history of the world. Frozen in the ice are chemical markers which, when studied by scientists, can help reveal a ...

Purpose: The effects of extreme temperatures on drug delivery of two albuterol sulfate hydrofluoroalkane, metered-dose inhalers (MDIs) were evaluated.Methods. Three Proventil HFA and three ...

Sulfate aerosols, whether generated by volcanoes or by humans burning coal, oil, and other fossil fuels, now seemed likely culprits in climate cooling. Early computer models of the global climate ...

However, estimates of the volume of sulfate aerosols released from the vaporization of the impacted rocks in Mexico have varied widely over two orders of magnitude from one study to another.

Secondary aerosols consist of mixtures of compounds; the main components are sulphate, nitrate, and OC. The main precursor gases are emitted from fossil fuel combustion, but fires and biogenic ...

Albuterol sulfate 90mcg/inh; metered-dose aerosol (with a dose counter); CFC-free. Proair HFA (albuterol sulfate) Inhalation Aerosol is supplied as a pressurized aluminum canister with a red ...

The sulfate aerosols from the gases alter the properties of the atmosphere. While invisible to the human eye, the volcanic aerosols create a veil in the atmosphere blocking some of the incoming ...

Leak Rate. It is common for MDIs to lose propellant during storage. The propellant-leak rate of the test MDIs was compared with that of the controls (Figure 3). The leak rates for the Proventil ...