primitive cell


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primitive cell

[′prim·əd·iv ′sel]
(crystallography)
A parallelepiped whose edges are defined by the primitive translations of a crystal lattice; it is a unit cell of minimum volume.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
However, the lattice mismatch between Ge(111) primitive cell ([a.sub.Ge(111)] = 4.000 [Angstrom]) and 4H-SiC(0001) primitive cell ([a.sub.4H-SiC(0001)] = 3.078 [Angstrom]) is as large as 23.0%, which can cause distortion or even dislocation near the interface, leading to a poor crystalline quality of the Ge epilayer.
The retiform variant is exceptional among sex-cord tumors because it has no definitive testicular counterpart and likely arises from a more primitive cell type [7, 8, 11].
Actual spaceflight and simulated weightlessness data from hematopoietic stem cells (HSCs) are limited compared to data from experiments involving other cell types (such as osteoblasts or T cells), as recognition of these primitive cell types in the bone marrow is a recent development (16), (75).
In order to identify biological heterogeneity on the basis of the primitive cell behavior, and to limit heterogeneity due to patient diversity and/or disorder variations, no sample pooling was performed for any of the experimental strategies.
The results above are described in terms of a lattice defined by a cubic primitive cell (a = 8.6603 [Angstrom]).
We know that many childhood cancers are of primitive cell origin.
In fact, in a cubic lattice the particles are located in such a way to ensure the symmetry of the primitive cell. To preserve the symmetry of a given cell formed by a number of primitive cells, it is necessary to keep a geometric progression of the number of primitive cells.
It has been suggested that a primitive cell in the olfactory membrane is a precursor of SNTCS; this hypothesis is based on the resemblance of SNTCS to olfactory neuroblastoma and the frequent presence of neuroectodermal tissue?
This multitasking would have allowed a primitive cell with a small repertoire of proteins to get things done.
"We're taking a specialized adult cell and genetically reprogramming it, so it behaves like a more primitive cell."
The antibody exhibits high specificity for SSEA-5, a primitive glycan found in extreme abundance on all pluripotent stem cell types and a limited number of other primitive cell types.
His initial structure, based on his often successful method of fitting atoms together, had a face centered cubic unit cell with a lattice constant of 2.67 nm, containing 1168 atoms (292 atoms per primitive cell).