pore diameter

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• Nuclear pore — Diagram of human cell nucleus. Nuclear pore labeled at bottom left …   Wikipedia

• nuclear pore complex — a nuclear pore (q.v.) and its associated glycoproteins, which regulates transport between the nucleus and the cytoplasm. It has a diameter of approximately 80–100 nm and is composed of three stacked, octagonally symmetric, ringlike arrays of… …   Medical dictionary

• nuclear pore — Openings in the nuclear envelope, diameter about 10nm, through which molecules such as nuclear proteins (synthesized in the cytoplasm) and mRNA must pass. Pores are generated by a large protein assembly …   Dictionary of molecular biology

• Protection of exposed concrete — is necessary to prolong its service life. A 120 year design life for concrete infrastructure has become increasingly common. Without early preventive maintenance this design life target may be optimistic. The design service life of reinforced… …   Wikipedia

• Constrictivity — is a dimensionless parameter used to describe transport processes (often molecular diffusion) in porous media. Constrictivity is viewed to depend on the ratio of the diameter of the diffusing particle to the pore diameter. The value of… …   Wikipedia

• Porosimetry — is an analytical technique used to determine various quantifiable aspects of a material s porous nature, such as pore diameter, total pore volume, surface area, and bulk and absolute densities.The technique involves the intrusion of a non wetting …   Wikipedia

• Nanofluidics — is the study of the behavior, manipulation, and control of fluids that are confined to structures of nanometer (typically 1 100 nm) characteristic dimensions (1 nm = 10 9 m). Fluids confined in these structures exhibit physical behaviors not… …   Wikipedia

• Mesoporous silicates — are silicates with a special morphology.BackgroundPorous inorganic solids have found great utility as catalysts and sorption media because of their large internal surface area, i.e. the presence of voids of controllable dimensions at the atomic,… …   Wikipedia

• Mass diffusivity — This article is about coefficient of molecular diffusion of mass. For other uses, see Diffusivity (disambiguation). Diffusivity or diffusion coefficient is a proportionality constant between the molar flux due to molecular diffusion and the… …   Wikipedia

• Mesoporous silicate — Mesoporous silicates are silicates with a special morphology. Contents 1 Background 2 Characteristics 3 References 4 See also …   Wikipedia

• zeolite molecular sieves — are crystalline, highly porous materials, which belong to the class of alumino silicates. These crystals are characterized by a three dimensional pore system, with pores of precisely defined diameter. This diameter is in the dimension of the size …   Petroleum refining glossary