threshold concentration

См. также в других словарях:

• mean threshold concentration — vidutinė ribinė koncentracija statusas T sritis apsauga nuo naikinimo priemonių apibrėžtis Mažiausia medžiagų koncentracija, kuri gali sukelti pastebimą fiziologinį poveikį (žmonės patiria tik nedidelius sveikatos sutrikimus – išbėrimus, kosulį,… …   Apsaugos nuo naikinimo priemonių enciklopedinis žodynas

• threshold — 1. The point at which a stimulus first produces a sensation. 2. The lower limit of perception of a stimulus. 3. The minimal stimulus that produces excitation of any structure; e.g., the minimal stimulus eliciting a moto …   Medical dictionary

• Threshold voltage — The threshold voltage of a MOSFET is usually defined as the gate voltage where an inversion layer forms at the interface between the insulating layer (oxide) and the substrate (body) of the transistor. The creation of this layer is described next …   Wikipedia

• Threshold Limit Value — The Threshold Limit Value (TLV) of a chemical substance is a level to which it is believed a worker can be exposed day after day for a working lifetime without adverse health effects. Strictly speaking, TLV is a reserved term of the American… …   Wikipedia

• Threshold limit value — The threshold limit value (TLV) of a chemical substance is a level to which it is believed a worker can be exposed day after day for a working lifetime without adverse health effects. Strictly speaking, TLV is a reserved term of the American… …   Wikipedia

• threshold limit value — (TLV) a value assigned to an industrial chemical by the American Conference of Governmental Hygienists, representing the maximum concentration to which most workers can be repeatedly exposed without adverse health effects …   Medical dictionary

• Odor detection threshold — The odor detection threshold is the lowest concentration of a certain odor compound that is perceivable by the human sense of smell. The thresholds of a chemical compound is determined in part by its shape, polarity, partial charges and molecular …   Wikipedia

• Odor threshold value — (=aroma threshold value, =OTV, =ATV)) is a measure of odor intensity of a substance. It is defined as a minimal concentration of that substance that can be detected by human nose.Some substances can be detected when their concentration is only… …   Wikipedia

• Measures of pollutant concentration — NOEL redirects here. For other uses, see Noel (disambiguation). Measures of pollutant concentration are used to determine risk assessment in public health. Industry is continually synthesizing new chemicals, the regulation of which requires… …   Wikipedia

• No effect concentration — (NEC) is a risk assessment parameter that represents the concentration of a pollutant that will not harm the species involved, with respect to the effect that is studied. It is often the starting point for environmental policy [Bruijn et al, 1997 …   Wikipedia

• Absolute threshold of hearing — The absolute threshold of hearing (ATH) is the minimum sound level of a pure tone that an average ear with normal hearing can hear with no other sound present. The absolute threshold relates to the sound that can just be heard by the… …   Wikipedia