Ovum Transport

Accurate Debye–Waller factors of 7LiH and 7LiD by neutron diffraction at three temperatures

“…First, the latest version of LINEX (Becker & Coppens, 1975) was used, which allows the treatment of extinction in terms of different models, together with harmonic thermal parameters and a scale factor. The scattering lengths are those of Koester (1978) for 7Li, of Koester (1975) for hydrogen and of Koester (1977) for deuterium; they were not refined during the analysis. The weighting scheme is inversely proportional to the variance of the reflection intensity and the ignorance factor is estimated at 1% for all data sets.…”

“…This estimation is surely higher than the true value Koester (1978). t H: Koester (1975). ~t D: Koester (1977).…”

Scanning Electron Microscopy of Human Reproductive Physiology

“…Ciliary activity is responsible for the movement of ova into the ostium of the fimbriated tip and through the upper ampulla. Concomitant with this, there is at the time of ovulation and during preliminary migration through the tube, a sharp increase in the intensity of muscular contractions (Koester, 1970; Aref & Hafez, 1973). Cilia of ampullary cells usually point toward the uterus.…”

Egg Transport in the Fallopian Tube

“…The relative importance of muscular activity, ciliary movement, and flow of secretions is debatable, although it is generally accepted that there are regional differences in the contribution made by each of these elements. It is believed, for instance, that ciliary activity is more important to initiate the movement of eggs while they are in cumulus at the distal end that at later stages [8], On the other hand, it has been proposed that the flow of secretions is more apt to affect the passage of eggs through the narrow than the wider portions of the lumen [32], There are, in addition, species differences in the pro portion, distribution, and arrangement of the cellular components of the oviduct which complicate the picture and warn against generalizations.…”