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Permafrost
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Supination
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Uracil
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Acini
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Down quark
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Beta version
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Androsterone
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Electrode
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Ingestion
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Vaccine
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LDAP
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Black walnut
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Blood-brain
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Widmannstätten
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Activation
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Entropy
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Flood control zone
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Pauli exclusion principle
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Sunspot
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CFM
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Endocrine system
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Celestial equator
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AES
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M87
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Hyperplasia
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Class IV antiarrhythmic
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LBCO
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Polarisation
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TNM Classification
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Alkaloid
Gap
The term gap is used in the physics of semiconductors when considering their valence band and conduction band.
Between these two bands there is an energy gap into which a charge carrier cannot go: it is a forbidden band. The gap in question is the energy gap between the two bands.
The valence and conduction bands for an insulator, a semiconductor and a metal conductor. Credit: Francoise Mulhauser
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