Abstract: This paper introduces a novel and simple etching technique that utilizes a mixture of sulfuric acid (H2 SO4) and hydrofluoric acid (HF). This method selectively etches silicon dioxide (SiO2) ...

THE thermal decomposition of ammonium sulphate appears to have received little attention since the recorded observations of Jänecke in 1921 1. Consequently it has become accepted that decomposition ...

PPIs are more effective than H2 blockers for treating severe acid reflux symptoms. H2 blockers can be taken for occasional heartburn or when symptoms happen rarely. Acid reflux (gastroesophageal ...