Acidity, defined as pH, is a central component of aqueous chemistry. In the atmosphere, the
acidity of condensed phases (aerosol particles, cloud water, and fog droplets) governs the …

Existing descriptions of bi-directional ammonia (NH 3 ) land–atmosphere exchange incorporate
temperature and moisture controls, and are beginning to be used in regional chemical …

Rapid development of agriculture and fossil fuel combustion greatly increased US reactive
nitrogen emissions to the atmosphere in the second half of the 20th century, resulting in …

The umbilical cord has become an increasingly used source of mesenchymal stromal cells
for preclinical and, more recently, clinical studies. Despite the increased activity, several …

In this study, we present ∼1yr (October 1998–September 1999) of 12-hour mean ammonia (NH
3 ), ammonium (NH 4 + ), hydrochloric acid (HCl), chloride (Cl − ), nitrate (NO 3 − ), nitric …

Temporal and spatial variations in ammonia (NH 3 ) emissions and ammonium (NH 4 + )
concentrations associated with aerosols and volume‐weighted NH 4 + concentration in …

Wet deposition and transport analysis has been performed for ammonium (NH 4 + ) in North
Carolina, USA. Multiple regression analysis is employed to model the temporal trend and …

The need for ambient gaseous ammonia (NH3) measurements has increased in the last
decade as reactive NH3 concentrations and deposition fluxes show little change even with …

This review focuses on the human pancreatic islet—including its structure, cell composition,
development, function, and dysfunction. After providing a historical timeline of key …

During tissue healing, the dynamic and temporal alterations required for effective repair occur
in the structure and composition of the extracellular matrix (ECM). Matricellular proteins (…