| D007659 |
Ketones |
Organic compounds containing a carbonyl group |
Ketone |
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| D008722 |
Methods |
A series of steps taken in order to conduct research. |
Techniques,Methodological Studies,Methodological Study,Procedures,Studies, Methodological,Study, Methodological,Method,Procedure,Technique |
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| D009279 |
Naphthacenes |
Polyacenes with four ortho-fused benzene rings in a straight linear arrangement. This group is best known for the subclass called TETRACYCLINES. |
Tetracenes,Benz(b)Anthracenes |
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| D010616 |
Phenanthrenes |
POLYCYCLIC AROMATIC HYDROCARBONS composed of three fused BENZENE rings. |
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| D002621 |
Chemistry |
A basic science concerned with the composition, structure, and properties of matter; and the reactions that occur between substances and the associated energy exchange. |
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| D002855 |
Chromatography, Thin Layer |
Chromatography on thin layers of adsorbents rather than in columns. The adsorbent can be alumina, silica gel, silicates, charcoals, or cellulose. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed) |
Chromatography, Thin-Layer,Thin Layer Chromatography,Chromatographies, Thin Layer,Chromatographies, Thin-Layer,Thin Layer Chromatographies,Thin-Layer Chromatographies,Thin-Layer Chromatography |
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| D005453 |
Fluorescence |
The property of emitting radiation while being irradiated. The radiation emitted is usually of longer wavelength than that incident or absorbed, e.g., a substance can be irradiated with invisible radiation and emit visible light. X-ray fluorescence is used in diagnosis. |
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| D000397 |
Air Pollution |
The presence of contaminants or pollutant substances in the air (AIR POLLUTANTS) that interfere with human health or welfare, or produce other harmful environmental effects. The substances may include GASES; PARTICULATE MATTER; or volatile ORGANIC CHEMICALS. |
Air Quality,Air Pollutions,Pollution, Air |
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| D001551 |
Benz(a)Anthracenes |
Four fused benzyl rings with three linear and one angular, that can be viewed as a benzyl-phenanthrenes. Compare with NAPHTHACENES which are four linear rings. |
Benz(b)Phenanthrenes,Naphthanthracenes |
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| D013053 |
Spectrophotometry |
The art or process of comparing photometrically the relative intensities of the light in different parts of the spectrum. |
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