BACKGROUND The objective of this anonymous postal survey was to assess the provision of dental prophylaxis by pediatric dentists in New England. METHODS The questionnaire survey was sent by first class mail in September, 2001 to all 217 American Academy of Pediatric Dentistry (AAPD) members in active private practice in the six New England States of Connecticut, Massachusetts, Maine, New Hamp...

background: the presence of heavy metals in aquatic and terrestrial ecosystems causes harmful effects to living organisms in the environment. this research aimed to determine the potential of activated pumice stone (aps) as a sorbent for the removal of cd, cu, and zn from wastewater. methods: this research was conducted during 2013 on a laboratory scale. the study was performed using batch expe...

Abstract Melt inclusions readily rupture and form gas bubbles during explosive volcanic eruptions, but their role as a source remains enigmatic. Here, we examined pumice texture generated by the instantaneous bursting of melt 946 CE Plinian eruption at Baekdusan. The burst produced non-sheared, super-vesicular (>80 vol.% voids) bubble pockets, occupying volume fractions 6–24% within Millenni...