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Emission

Meanings and phrases

emission

n.

1. the act of emitting; causing to flow forth; emanation
2. a substance that is emitted or released; discharge
3. any of several bodily processes by which substances go out of the body; discharge; expelling
4. the release of electrons from parent atoms
5. the occurrence of a flow of water (as from a pipe)

emission spectrum

n.

1. spectrum of electromagnetic radiation emitted by a self-luminous source

field emission

n.

1. the emission of electrons that are stripped from parent atoms by a high electric field

greenhouse emission

n.

1. a gas that contributes to the greenhouse effect by absorbing infrared radiation; greenhouse gas

infrared emission

n.

1. electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves; infrared; infrared light; infrared radiation

nocturnal emission

n.

1. ejaculation during sleep (usually during a dream)

photoelectric emission

n.

1. the release or absorption of quanta above a certain energy level

positron emission tomography

n.

1. using a computerized radiographic technique to examine the metabolic activity in various tissues (especially in the brain); PET

E.g.

• The fluorine isotope 18 is a positron emitter that is used in positron emission tomography (PET).
• Matter–antimatter reactions have practical applications in medical imaging, such as positron emission tomography (PET).
• New dioxaborolane chemistry enables radioactive fluoride (F) labeling of antibodies, which allows for positron emission tomography (PET) imaging of cancer.

positron emission tomography scanner

n.

1. a tomograph that produces cross-sectional X-rays of metabolic processes in the body; PET scanner

radio emission

n.

1. an electromagnetic wave with a wavelength between 0.5 cm to 30,000 m; radio wave; radio radiation

secondary emission

n.

1. the emission of electrons from a surface that is bombarded by higher energy primary electrons

thermal emission

n.

1. the emission of electrons from very hot substances; thermionic emission

thermionic emission

n.

1. the emission of electrons from very hot substances; thermal emission

emission lines

E.g.

• It is unusual because of its strong silicon emission lines.
• These emission lines seen were from N=1 to N=0 and N=2 to N=1.
• The spectrum shows emission lines of calcium in the H and K bands.

emission standards

E.g.

• The engines meet US tier three emission standards.
• The Class 68 complies with Stage III A of the European emission standards.
• It did not meet the United States emission standards and thus was not available in that market.

positron emission

E.g.

• β decay is also known as positron emission.
• The fluorine isotope 18 is a positron emitter that is used in positron emission tomography (PET).
• Matter–antimatter reactions have practical applications in medical imaging, such as positron emission tomography (PET).

emission tomography

E.g.

• Positron emission tomography is becoming the most useful imaging technique.
• The fluorine isotope 18 is a positron emitter that is used in positron emission tomography (PET).
• Matter–antimatter reactions have practical applications in medical imaging, such as positron emission tomography (PET).

emission reduction

E.g.

• Carbon emission reduction from DFCs will help DFCCIL claim carbon credits.
• With around one third of triadic patents Germany leads the way worldwide in the field of vehicle emission reduction.
• The agreement allows AEP to achieve emission reduction goals while also shutting down Unit 1 without adding costly pollution control systems.