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A boundary or end. [L. limes, boundary]
elastic l. the greatest stress to which a material may be subjected and still be capable of returning to its original dimensions when the forces are released.
Hayflick's l. the l. of human cell division in subcultures; such cells will divide only about 50 times before dying out.
permissible exposure l. an occupational health standard to safeguard workers against dangerous contaminants in the workplace.
proportional l. the greatest stress that a material is capable of sustaining without any deviation from proportionality of stress to strain (Hooke's law).
quantum l. the shortest wavelength found in an x-ray spectrum.
short-term exposure l. (STEL) the maximum concentration of a chemical to which workers may be exposed continuously for up to 15 minutes without danger to health or work efficiency and safety.
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