Claim · model-written summary
The movement suggests decreased egg cytoplasm density.
- Outcome
- density of the egg cytoplasme0
- Direction
- decreasee0
- Qualifier
- rather than an increase of the density of the proembryonal nucleie0
Not reportedTaxon
Verbatim
e0“indicating a decrease of the density of the egg cytoplasm, rather than an increase of the density of the proembryonal nuclei.”
Title
T. SHIMAMURA CYTOLOGIA 1929. doi:10.1508/cytologia.1.59
Other claims from this paper (9)
- Observation The egg nucleolus is heavier than other nuclear constituents.
- Observation Proteid vacuoles do not form distinct zones after centrifugation because their density is similar to cytoplasm.
- Observation Early proembryo free nuclei could not be displaced by centrifugation.
- Mechanism The authors infer no marked density difference between early proembryo nuclei and cytoplasm.
- Observation After four nuclei reached the egg-cell bottom, cytoplasm consistency changed.
- Observation At that stage centrifuged nuclei moved readily toward the centrifugal end.
- Observation At the eight-nucleate stage, upper-tier nuclei could be displaced centrifugally.
- Observation BENDA’S or CHAMPY’s fixation showed no clear nuclear membrane and homogeneous nuclear material.
- Observation FLEMMING’S or BOUIN’s fixation showed a clear nuclear membrane and reticula.