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Scanning tunneling microscopy image of pentacene molecules on nickel.
Scanning tunneling microscopy image of pentacene molecules on nickel.
Pentacene powder
Pentacene powder
Image: lossy page 1 Pentacene.Polymers.tif
Image: lossy page 1 Pentacene.Polymers.tif
Image: lossy page 1 OLIGOMERS.tif
Image: lossy page 1 OLIGOMERS.tif
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Three representations of hexabenzocoronene, a polycyclic aromatic hydrocarbon. Top: standard line-angle schematic, where carbon atoms are represented
Three representations of hexabenzocoronene, a polycyclic aromatic hydrocarbon. Top: standard line-angle schematic, where carbon atoms are represented by the vertices of the hexagons and hydrogen atoms are inferred. Middle: ball-and-stick model showing all carbon and hydrogen atoms. Bottom: atomic force microscopy image.
A wood-burning open-air cooking stove. Smoke from solid fuels like wood is a large source of PAHs globally.
A wood-burning open-air cooking stove. Smoke from solid fuels like wood is a large source of PAHs globally.
Smog in Cairo. Particulate air pollution, including smog, is a substantial cause of human exposure to PAHs.
Smog in Cairo. Particulate air pollution, including smog, is a substantial cause of human exposure to PAHs.
Crude oil on a beach after a 2007 oil spill in Korea.
Crude oil on a beach after a 2007 oil spill in Korea.