Biomaterial Database

The estimation of velocity distribution profile of Paramecium cytoplasmic streaming. 1979

J Sikora, and A Wasik, and Z Baranowski

Cytoplasmic streaming of Paramecium bursaria and Paramecium tetraurelia was investigated by cinematographic techniques. Analysis of the records reveals the paraboidal character of the velocity distribution profiles in all arbitrarily chosen zones along the whole route of moving cytoplasm in the cell. According to the date obtained from cytoplasmic streaming analysis and food vacuole path, the geometry of the "channel" was described in terms of ellipsoid axes. Total volume changes of cytoplasm flowing through a given cross section in a given time unit were computed and no significant differences were found. The participation of a pressure gradient in motive force generation in cytoplasmic streaming is discussed.

UI	MeSH Term	Description	Entries
D009068	Movement	The act, process, or result of passing from one place or position to another. It differs from LOCOMOTION in that locomotion is restricted to the passing of the whole body from one place to another, while movement encompasses both locomotion but also a change of the position of the whole body or any of its parts. Movement may be used with reference to humans, vertebrate and invertebrate animals, and microorganisms. Differentiate also from MOTOR ACTIVITY, movement associated with behavior.	Movements
D010247	Paramecium	A genus of ciliate protozoa that is often large enough to be seen by the naked eye. Paramecia are commonly used in genetic, cytological, and other research.	Parameciums
D003593	Cytoplasm	The part of a cell that contains the CYTOSOL and small structures excluding the CELL NUCLEUS; MITOCHONDRIA; and large VACUOLES. (Glick, Glossary of Biochemistry and Molecular Biology, 1990)	Protoplasm,Cytoplasms,Protoplasms
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D012212	Rheology	The study of the deformation and flow of matter, usually liquids or fluids, and of the plastic flow of solids. The concept covers consistency, dilatancy, liquefaction, resistance to flow, shearing, thixotrophy, and VISCOSITY.	Flowmetry,Velocimetry,Velocimetries