BMSCs were labeled in serum-free RPMI medium containing 2.25×107 gold nanoparticles/mL (British Biocell International, Wales, U.K, particle size-250 nm) and 10 ng/mL protamine sulfate at 37C.
Stream loads in excess of annual Hg atmospheric deposition (ratio > 1) were observed in watersheds containing Hg mines and in relatively small and medium-sized watersheds with gold or silver mines, however, larger watersheds containing gold or silver mines, some of which also contain large dams that trap sediment, were sometimes associated with lower load ratios (< 0.2).
Native gold and electrum are naturally-occurring alloys containing gold and silver and a little copper.
Cells were washed three times before being mounted on slides with anti-fading medium containing DAPI (SlowFade Gold antifade reagent with DAPI, Life Technologies).
After washing, sections were incubated with AlexaFluor 488-conjugated goat anti-rat IgG (Invitrogen) for 1 hour, and then mounted in ProLong Gold medium containing DAPI (Invitrogen) in order to couterstain nuclei.
RASFs were incubated for 48 hours with medium containing IC20 of azathioprine, gold sodium thiomalate, chloroquine phosphate, MTX, piroxicam, diclofenac, methylprednisolone, and prednisolone, respectively.
All tissues were cultured on a membrane with 1.2 mL of air-buffered medium containing 0.1 mM beetle luciferin (Gold Biotechnologies).
Slides were cover-slipped using antifade medium containing 4′,6-diamidine-2′-phenylindole dihydrochloride (DAPI) (ProlonGoldld; Invitrogen) and assessed and photographed using an RT Slider digital camera (Diagnostic Instruments, Sterling Heights, Michigan, USA) mounted on an E600 fluorescence microscope (Nikon Instruments, Melville, New York, USA).
