The alterations produced by microbiological attack on terpenoid resin-based varnishes from panel and canvas paintings have been evaluated using pyrolysis-gas chromatography-mass spectrometry (Py-GC-MS) and gas chromatography-mass spectrometry (GC-MS). The proposed methods include the on-line derivatisation of drying oils and diterpenoid resins using hexamethyldisilazane during pyrolysis and the...

Manganiferous rock varnish (desert varnish) is common in subtropical deserts, but coatings of amorphous silica glaze dominate rock surfaces of the same lithology and exposed to similar amounts of annual precipitation in the rain shadows of the large tropical shield volcanoes such as those in Hawaii. Lacking an explanation for this contrast, a two decade-long laboratory experiment tested importa...

Dibromohemibastadin-1 (DBHB) is an already known potent inhibitor of blue mussel phenoloxidase (which is a key enzyme involved in bioadhesion). Within this study, the potentiality of DBHB against microfouling has been investigated. The activity of DBHB was evaluated on key strains of bacteria and microalgae involved in marine biofilm formation and bioassays assessing impact on growth, adhesion ...

BACKGROUND The Centers for Disease Control and Prevention reports that topical fluoride application may prevent early childhood caries in high-risk populations. Yet, there are few published descriptions of caries prevention curricula for primary care residents. METHODS In 2003, the New Hampshire-Dartmouth Family Practice Residency hired a dentist and a hygienist to develop and implement a did...