Pole

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POLE. A measure of length, equal to five yards and a half. Vide Measure.

References in periodicals archive ?
At late anaphase, the actin distribution at the polar body sites became very sparse and an actin-poor circular region was recognized at the animal pole. At anaphase of the first meiosis, the spindle "docked" in this actin-poor region.
knerii, cubic follicular cells in the animal pole and prismatic ones on the vegetative pole were observed; similar to what has been registered for Cichlidae (Normando et al., 2009; Martins et al., 2011).
From my observation, when there is a dent on an animal pole at the 16-32 cell stages, the incidence of twin embryos production may be up.
The cell cortex that lies underneath the jelly canal is the animal pole of the egg (1), (2).
The first observation was of the early blastula, which was located at the animal pole. At approximately 13 hours postfertilization, epiboly began, and involution marked the start of gastrulation.
These cells then started to darken, losing their transparency (Figure 4A, B), and became located along the inner surface of the body wall; in contrast, cells in normal larvae retained their transparency and were located near the primary gut (archenteron), moving later through the blastocele to the animal pole (Figure 4C, F).
The cleavage furrow was colocated with the position of the extruded polar bodies at the animal pole. Also, the midbody between the cells became apparent at telophase (Fig.
After fertilization, these patterns change and [beta]-tubulinrich streams oriented toward the animal pole are formed along the outer cortex of the embryo.
Abnormal cap formation was observed in about 5% of the embryos examined and included displacement of the cytoplasm to one side of the animal pole or splitting of the cap at the apex into two regions.
We localized injections to the animal pole of each oocyte.
At 10 mM [NH.sub.4]Cl, some oocytes became ameboid, indicating the onset of pseudocleavage, a sign of differentiation without cleavage; at 20 mM, approximately 20% of the oocytes formed protrusions at the animal pole, which resembled attempts at polar body formation.
As early as the onset of invagination, cells emerge from the thinner part of the epithelium and enter the perivitelline space at the animal pole [ILLUSTRATION FOR FIGURE 5B OMITTED].