First account of apochlorotic diatoms from mangrove waters in Florida.

From January to December 2004, monthly samples were collected from the mangrove salt marsh of J.U. Lloyd State Park, Florida, to examine the spatial and temporal distributions of heterotrophic diatoms in this subtropical region.

The prevention of microfouling and macrofouling on hydrogels impregnated with either Arquad 2C-75 or benzalkonium chloride.

Optically clear, surfactant loaded poly (2-hydroxyethyl methacrylate) (pHEMA) hydrogels can be used to prevent fouling on optical windows of marine underwater sensors. To act successfully in this capacity, hydrogels need to prevent both microfouling and macrofouling. Panel trials were conducted using four different materials: unloaded hydrogels, hydrogels containing either benzalkonium chloride (BAC) or dicocodimethylammonium chloride (Arquad 2C-75) and PMMA coupons.