Mindblown: a blog about philosophy.
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Limiting reactant
The substance with the lowest concentration in a chemical reaction. Its amount determines the amount of product made from that reaction.
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Reactant
A chemical or substance taking part in a chemical reaction.
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Reacher
A type of extension device for assisting persons with limited reach to grasp and manipulate objects in the performance of everyday tasks.
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Purified rayon
A fibrous form of regenerated cellulose manufactured by the viscose process, desulfured, washed, and bleached. Once used in surgical dressings and bandages.
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Secondary ray
X-ray photons produced after the incoming, primary x-ray photons remove an inner-shell electron from the atom. They are of lower energy than the primary radiation and usually are absorbed in matter.
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Primary ray
In radiographic imaging, the x-ray beam that originates at the source of radiation. It is usually used to differentiate those rays from the additional scatter radiation that constitutes the majority of the beam used to create images.
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Positive ray
A ray composed of positively charged ions that in a discharge tube moves from the anode toward the cathode.
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Pigment-producing ray
A ray between 2540 and 3100 A.U. that is most effective in stimulating pigment production in the skin. This is due to a local response to irritation of cutaneous prickle cells.
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Heat ray
Radiation whose wavelength is between 3,900 and 14,000 A.U. Shorter wavelength heat sources penetrate tissues better than longer (infrared) sources.
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Hard ray
An x-ray photon of short wavelength and great penetrative power.
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