Openings or channels in the theca of dinoflagellates that can be involved in extrusion of trichocysts or mucocysts and other active processes. Pore number and location are variable within a species, but in many groups, the pattern is a reliable, but variable character for identification of species (Steidinger & Tangen 1996).
part of ion channel which forms path ions use to move from one side of membrane to other. Often lined with some hydrophilic amino acids. Sometimes filled with water. Pore lengths have been inferred for some ion channels by blocking the pore during conduction experiments using blocking agents with long spacer arms. CFTR's pore is estimated to be around 5.8A at its narrowest point. Narrow pores will necessitate removal of some or all of an ions hydration shell before allowing passage.
A term which refers to small passageways or tunnels that criss-cross or "honeycomb" a particle. The term is typically used in reference to the small particles which make up the stationary phase of a column. Additionally, the term may also refer to the passageways in a frit or filtering surface.
(pl. pores, adj. porate) ( Jackson, 1928; Wodehouse, 1935). A general term, applied in palynology to a circular or elliptic aperture with a length/breadth ratio less than 2 See also: aperture, porus, ulcus.
Essentially circular micro-discontinuity in the surface extending through to the underlying coating or to the basis metal. Primary current distribution : The distribution of the current over the surface of an electrode in the absence of polarization.