(n.) The act of drying, or the state of growing dry.
Example Sentences:
Rarefaction
Definition:
(n.) The act or process of rarefying; the state of being rarefied; -- opposed to condensation; as, the rarefaction of air.
Example Sentences:
(1) Three mechanisms are held responsible for the resistance increase: (1) a rarefaction of the smallest arterioles and capillaries, (2) an increased wall to lumen ratio and (3) a decreased internal diameter.
(2) When enalapril was given up to 14 weeks of age, the long-term suppression of amplifier properties was probably mainly through prevention of smooth muscle hypertrophy in resistance vessels and possibly through other mechanisms (e.g., "rarefaction").
(3) The cochlear summating potential (SP) preceding the auditory nerve compound action potential (AP) was elicited by broadband alternating condensation and rarefaction clicks and recorded by noninvasive electrodes from the external auditory meatus (EAM) of 60 volunteers of both sexes, 12 to 67 years old, who had normal hearing for age.
(4) BAEPs utilized rarefaction stimulation at 70 dB SL, with 150-3,000 Hz filter band pass and 10 ms. analysis time.
(5) On the basis of this property and a previously observed favourable effect of the enzyme on microcirculation, the capacity for more rapid rarefaction and elimination of caseous masses and prevention of excessive fibrosis, it was recommended for use in treatment of cerebrospinal disorders in tuberculous spondylitis.
(6) Rarefaction clicks produced shorter wave I latency and longer I-III interpeak latency, but the differences were significant in the female only.
(7) Typical features of rarefaction, osteoporosis, cysts, and cortical erosions were present.
(8) Multiple infarcts and white matter rarefaction are commonly seen as a component of Alzheimer disease, in keeping with the development of congophilic angiopathy and possibly other vascular changes in the latter disease.
(9) Thus the intensity functions of the round window N1 potential have a two-segment course and there is a difference in the response to rarefaction and condensation clicks, depending upon the content of low-frequency components in the click stimulus.
(10) Besides an obvious increase in blood rachemia in the arteries and veins, its rarefaction is observed in the capillaries.
(11) The lesion specific to the white matter showed rarefaction and gliosis without locally associated ischemic changes.
(12) Prevention of the experimental bone rarefaction which occurs in rats put on a low calcium diet was attempted by using salmon calcitonin and 25 hydroxyvitamin D given with a similar regimen to that used in human disease.
(13) Tone pip stimuli produced polarity differences that were inversely related to stimulus frequency: the higher the frequency, the smaller the ABR latency differences between responses to rarefaction and condensation stimuli, and the smaller the difference potentials.
(14) Foci of myeloid metaplasia may occasionally result in clinical disability, with bone pain and rarefaction.
(15) The following classification of the cerebellar granular layer damage was used: I degrees - focal rarefaction, II degrees - diffuse distinct rarefaction, III degrees - focal atrophy, IV degrees - diffuse atrophy.
(16) The latter ranged from spongiform transformation of the neuropil and scattered foci of demyelination to large perivenous areas with marked rarefaction of myelinated fibers.
(17) Along with this there occurs a rarefaction of the frequency of miniature potential of the end plate, and reduction of its amplitude.
(18) Recordings were obtained from normal hearing adults to separate trains of 5 rarefaction and 5 condensation clicks with interclick intervals of 10 msec and intertrain intervals of 500 msec at three intensities.
(19) The purpose of this study was to examine the muscle at the ultrastructural level to search for evidence of microvessel degeneration that would correlate with the concept of anatomic rarefaction in chronic hypertension.
(20) Electron microscopical examination was carried out in the renal tissue of 7 such cases, and showed dense mesangial deposits and a marked subendothelial rarefaction within the basement membrane.