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from article Messier Catalog
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from article Precipitation (chemistry)
Precipitation of calcium fluoride. (Copyright © McGraw-Hill Education/Stephen Frisch)
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from article Polystyrene
Polystyrene foam. (Credit: Raywoo/123RF)
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from article Vacuum fusion
Vacuum-fusion methods of analysis.
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from article Precession of equinoxes
Illustration of the celestial sphere, an imaginary sphere of infinite radius centered on the Earth and projected using Earth's celestial poles and celestial equator. (Credit: NASA)
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from article Precession of equinoxes
Motion of the Earth's axis of rotation.
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from article Soil chemistry
Proper soil chemistry helps a green seedling to sprout out from the soil. Soil chemistry controls the availability of plant nutrients within the soil and thus influences plant growth. (Credit: amenic181/Shutterstock)
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from article Soil chemistry
Extensive chemical weathering can remove essential minerals and elements from soil. Typically, only the most insoluble compounds remain in the soil. For example, iron oxides may persist, imparting a reddish-brown color to the soil. (Credit: Stephen…
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from article Soil chemistry
Factors influencing the chemistry of a soil solution. (Credit: Based on an original illustration created by J. F. Hodson)
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from article Supercritical-fluid chromatography
Block diagram of supercritical-fluid chromatograph. With some detectors (for example, flame ionization), the pressure/flow restrictor is mounted in the detector.
