mismatch

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mismatch

Informatics
See Language mismatch, Logic mismatch.
 
Molecular biology
A defect in the pairing of two complementary DNA sequences where a base in one strand differs from that expected (according to complementarity) with the other.
 
Neurophysiology
A ratio of neurotransmitter to neuroreceptor that differs from the expected 1:1.
 
For example, high concentrations of neuroreceptors for substance P are found in the neocortex and hippocampus, even though the neurotransmitters themselves are in low concentrations. The mismatch phenomenon implies the presence of another system(s) of cell communication, which may have a role in non-synaptic interaction among cells.
 
Pulmonology
A marked difference between ventilation (V) and perfusion (Q) on a V/Q scan, a finding typical of pulmonary embolism.

mismatch

Pulmonology A marked difference between ventilation–V and perfusion–Q on V/Q scan, typical of PTE. See Pulmonary thromboembolism, V/Q scan.
References in periodicals archive ?
Fractional Reserve Banking as a Promoter of Excessive Maturity Mismatching
Fractional reserve banking boosts the use of maturity mismatching by increasing overall liquidity and financing opportunities.
Central Banking as a Promoter of Maturity Mismatching
If the central bank accepts those long term assets as collateral against new loans, the risk of maturity mismatching is reduced.
Effectively the central bank removes the limits to maturity mismatching in general and credit expansion in particular that exist in a free banking system.
When there are malinvestments committed due to maturity mismatching this cannot be made undone by bailing out banks.
Government Guarantees as a Promoter of Maturity Mismatching
Government guarantees can also enhance the amount of maturity mismatching. Thus, government guarantees help to remove the limits to maturity mismatching that exist in a free banking system.
Moreover, by cartelizing the industry and bailing out failing banks, the guarantees together with fractional reserve banking and central banking remove the limits to maturity mismatching that were set by competition on the free market via runs on short-term assets and short-selling.
Banks can induce maturity mismatching by exploiting the yield curve, namely, by taking advantage of the fact that short-term interest rates are normally lower than longer term interest rates.
It is important to note that as a result of maturity mismatching the yield curve tends to flatten.
If the short-term savings are not rolled over, excessive maturity mismatching has occurred.