transitional zone


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zone

 [zōn]
an encircling region or area; by extension, any area with specific characteristics or boundary.
ciliary zone the outer of the two regions into which the anterior surface of the iris is divided by the collarette.
comfort zone an environmental temperature between 13 and 21°C (55 and 70°F) with a humidity of 30 to 55 per cent.
epileptogenic zone an area, stimulation of which may provoke an epileptic seizure.
erogenous zone (erotogenic zone) in psychoanalytic theory, an area of the body through which the libido expresses itself and which is therefore susceptible to erotic excitation upon stimulation; the primary sites are the oral, anal, and genital regions, but the other body orifices, breasts, and skin are also included.
zone of partial preservation in spinal cord injury, an area of only partial damage that may include up to three consecutive spinal segments caudal to the level of the injury.
pupillary zone the inner of the two regions into which the anterior surface of the iris is divided by the collarette.
transition zone (transitional zone) any anatomical region that marks the point at which the constituents of a structure change from one type to another; for example, the circle in the equator of the ocular lens in which epithelial fibers are developed into lens fibers, or the zone (anocutaneous line) that marks the junction of stratified squamous epithelium with columnar epithelium.

tran·si·tion·al zone

1. the equatorial region of the lens of the eye where the anterior epithelial cells become transformed into lens fibers;
2. that portion of a scleral contact lens between the corneal and scleral sections.

tran·si·tion·al zone

(tran-zish'ŭn-ăl zōn)
1. The equatorial region of the lens of the eye where the anterior epithelial cells become transformed into lens fibers.
2. That portion of a scleral contact lens between the corneal and scleral sections.
References in periodicals archive ?
(a) Dry year (2001) Confs R [sigma] RMSE BIAS Conf1 0.81 1.14 0.65 3.50 Conf2 0.73 5.62 -- 19.40 Conf3 0.74 3.26 2.65 45.30 Conf4 0.76 5.36 -- 10.10 Conf5 0.75 3.18 2.45 46.30 Conf6 0.83 3.08 2.35 28.60 Conf7 0.76 1.74 1.15 6.10 WRF-EM 0.79 1.44 0.9 -- ERA 0.65 1.72 1.87 16.40 (b) Wet year (2008) Confs R [sigma] RMSE BIAS Conf1 0.51 1.59 1.37 28.10 Conf2 0.13 4.01 -- 11.80 Conf3 0.81 1.39 0.70 142.9 Conf4 0.14 5.80 -- 17.10 Conf5 0.88 1.31 0.62 31.00 Conf6 0.91 1.30 0.57 19.90 Conf7 0.48 1.64 1.44 23.70 WRF-EM 0.87 1.33 0.65 -- ERA 0.42 0.31 0,90 0.80 Table 6: The four different statistic, for the transitional zone, (a) for the dry year and (b) for the wet year.
(b) [K.sub.ep] was higher in the peripheral zone tumors (lesion number, n = 52) than that of the transitional zone tumors (n = 17) (0.59 [+ or -] 0.21 [min.sup.-1] versus 0.49 [+ or -] 0.24 [min.sup.-1]; p < 0.05).
The distribution of MPA could also be explained by the fact that the Huaihe River is located in climatic transitional zone [13, 21].
AUC A: transitional zone (TZ) index=0.84, B: [V.sub.2] transitional ratio=0.91, C: [V.sub.2] R wave duration and R/S wave amplitude indices = 0.925.
Yoo and colleagues[sup.3] performed multivariate analyses using a large multicentre cohort of patients treated with TURP, and concluded that high PSA and low transitional zone volume could be used as predictive factors of incidental prostate cancer.
We were able to achieve significantly improved accuracy in localization of transitional zone following use of MPRs by both radiologists with good agreement between the two.
In the transitional zone (TZ) we did not find a significant difference between the two b values analyzed, although it was higher for a b-value of 2000 s/[mm.sup.2].
Therefore, we introduced an alternative treatment plan to challenge the transitional zone. With this plan, JD would play video games for 30 minutes at least twice a week, and preferably daily.
(1), described eastern North Dakota as a transitional zone. In our study, five spirochetes, based on cell morphology, were isolated from the hearts of Peromyscus maniculatus and Myodes gapperi around the Turtle River and Forest River areas of Grand Forks, ND.
A second transitional zone with a length of 7.5 mm which progressively changes from 3 to 2 cutting edges.
It is shown in this project that if we choose PLM result as standard, the IIMRI transitional zone (TZ) based on T2 characteristics are over estimated and the FTIR TZ based on dichroic ratio are under estimated.
The habitat associated with this trap is a transitional zone between the mixed grass lowland and a sandy upland comprised of sand plum, sage brush, and buffalo grass (Fig.