arm ratio


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ratio

 [ra´she-o] (L.)
an expression of the quantity of one substance or entity in relation to that of another; the relationship between two quantities expressed as the quotient of one divided by the other.
A/D ratio adult versus developmental toxicity ratio; the ratio between the toxic effects of a substance on adults (humans or animals, especially pregnant females) and such effects on developing embryos or fetuses.
A-G ratio (albumin-globulin ratio) the ratio of albumin to globulin in blood serum, plasma, cerebrospinal fluid, or urine.
arm ratio a figure expressing the relation of the length of the longer arm of a mitotic chromosome to that of the shorter arm.
benefit-risk ratio a determination of the potential of a research study for positive effects on patients compared to the risks of doing harm.
cardiothoracic ratio on a chest radiograph, the ratio of the transverse diameter of the heart to the internal diameter of the chest at its widest point just above the dome of the diaphragm.
grid ratio a ratio comparing the height of lead lines in an x-ray grid to the distance between the lead strips.
inspiratory-expiratory ratio the ratio of the inspiratory time to the expiratory time during the breathing cycle. Normally, expiratory time will be longer than inspiratory time; if the inspiratory time is longer than the expiratory time, gas trapping may result.
lecithin/sphingomyelin ratio see lecithin-sphingomyelin ratio.
risk ratio relative risk.
sex ratio the proportion of one sex to the other; by tradition the number of males in a population to the number of females, usually stated as the number of males per 100 females.
signal-to-noise ratio the ratio between the amplitude of a signal being measured and that of the noise.
urea excretion ratio the ratio of the amount of urea in the urine excreted in one hour to the amount in 100 ml of blood. The normal ratio is 50.
zeta sedimentation ratio (ZSR) a measurement comparable to the erythrocyte sedimentation rate, except that it is unaffected by anemia. The packed-cell volume (zetacrit) of a blood specimens is calculated by centrifuging the specimen in a Zetafuge, a specially designed instrument that produces controlled cycles of compaction and dispersion and allows rouleaux to form and sediment rapidly. The zetacrit divided into the true hematocrit gives the zeta sedimentation ratio.

arm ratio

In chromosomes, the relation of the length of the long arm of the mitotic chromosome to that of the short arm.
References in periodicals archive ?
With respect to waist circumference and other variables, we noted a positive correlation with trunk to arm ratio (r = 0.42; p < 0.007) and with zBMI (r = 0.68; p = 0.003) and a negative correlation with the limb to trunk ratio (r = -0.68; p = 0.000).
Except for chromosome 2 that was submetacentric (arm ration = 1.65), all chromosomes of the haploid set were classified as metacentric, their arm ratios ranging from 1.22 (chromosome 7) to 1.40 (chromosome 4).
Although chromosomes from diploid and triploid karyotypes are similar in relative length, variation exists in arm ratio. The karyotype formula reported here are quite different from that of Wang and Guo (2007), probably reflecting variations in chromosome condensation and/or errors in pairing and measurement.
Among the 10 pairs of chromosomes, Chromosome 1, 2, 9 and 10 were easy to identify because of their length and arm ratio. Karyotypic analysis clearly indicated that the specific FISH signals were located on chromosomes 5 and 6 (Fig.
Because the pattern of the hybridization signal on the complete rye chromosome, as well as its overall size and arm ratio corresponded to 4[R.sup.mon] as identified by C-banding and the in situ DNA hybridization, and such similarities of patterns of C-bands and DNA in situ hybridization had been observed regularly for the chromosomes of S.
The chromosome arm lengths were averaged together and the arm ratio (long arm:short arm average), total chromosome length (short arms + long arms), and relative chromosome lengths (length of the individual chromosome/ total length of all chromosomes in the genome) were calculated.
The karyotype is based on chromosome length, arm ratio, and C-banding patterns.
Relative lengths were calculated from the total chromosome length according to Thiriot-Quievreux (1984), and arm ratios were calculated according to the method of Levan et al.