Results 251 to 260 of about 7,829,285 (311)

Imaging the Pore Structure of Geomaterials

Science, 1995
Laser scanning confocal microscopy can be used to image the pore structure of geologic materials in three dimensions at a resolution of 200 nanometers. The technique involves impregnation of the void space with an epoxy doped with a fluorochrome whose fluorescent wavelength matches the excitation wavelength.
Fredrich, J.   +2 more
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PORE STRUCTURE OF SOLIDS

Pure and Applied Chemistry, 1976
Abstract A small grain of iron catalyst, used in the synthesis of ammonia, has an external surface of about 1 cm2/g, but it has an internal surface of 100,000 cm2/g. Since catalysis takes place on the surface, obviously the surface in the pores is of vital importance.
openaire   +1 more source

The Structure of the Nuclear Pore Complex

Annual Review of Biochemistry, 2011
In eukaryotic cells, the spatial segregation of replication and transcription in the nucleus and translation in the cytoplasm imposes the requirement of transporting thousands of macromolecules between these two compartments. Nuclear pore complexes (NPCs) are the sole gateways that facilitate this macromolecular exchange across the nuclear envelope ...
Hoelz, André   +2 more
openaire   +3 more sources

Nuclear pore structure and function

Seminars in Cell Biology, 1992
Nuclear pores are huge macromolecular assemblies, approximately 120 nm in diameter, that perforate the nuclear membrane and mediate nucleocytoplasmic transport. Nuclear pores are constructed from a cylindrical spoke-plug complex sandwiched between nucleoplasmic and cytoplasmic rings.
openaire   +2 more sources

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