What's the difference between structure and topology?

Structure


Definition:

  • (n.) The act of building; the practice of erecting buildings; construction.
  • (n.) Manner of building; form; make; construction.
  • (n.) Arrangement of parts, of organs, or of constituent particles, in a substance or body; as, the structure of a rock or a mineral; the structure of a sentence.
  • (n.) Manner of organization; the arrangement of the different tissues or parts of animal and vegetable organisms; as, organic structure, or the structure of animals and plants; cellular structure.
  • (n.) That which is built; a building; esp., a building of some size or magnificence; an edifice.

Example Sentences:

  • (1) The findings indicate that there is still a significant incongruence between the value structure of most family practice units and that of their institutions but that many family practice units are beginning to achieve parity of promotion and tenure with other departments in their institutions.
  • (2) The influence of the various concepts for the induction of lateral structure formation in lipid membranes on integral functional units like ionophores is demonstrated by analysing the single channel current fluctuations of gramicidin in bimolecular lipid membranes.
  • (3) We have determined the genomic structure of the fosB gene and shown that it consists of 4 exons and 3 introns at positions also found in the c-fos gene.
  • (4) Structure assignment of the isomeric immonium ions 5 and 6, generated via FAB from N-isobutyl glycine and N-methyl valine, can be achieved by their collision induced dissociation characteristics.
  • (5) The fine structure of neurofibrillary tangles in the hippocampal gyrus, substantia nigra, pontine nuclei and locus coeruleus of the brain was postmortem studied in a case of progressive supranuclear palsy.
  • (6) Life expectancy and the infant mortality rate are considered more useful from an operational perspective and for comparisons than is the crude death rate because they are not influenced by age structure.
  • (7) It has been generally believed that the ligand-binding of steroid hormone receptors triggers an allosteric change in receptor structure, manifested by an increased affinity of the receptor for DNA in vitro and nuclear target elements in vivo, as monitored by nuclear translocation.
  • (8) Immunocytochemistry was used to visualize cytoskeletal structures and to assay selective disruption of neurofilaments by acrylamide.
  • (9) The quaternary structure of ribonucleotide reductase of Escherichia coli was investigated, with the use of purified B1 and B2 proteins and bifunctional cross-linking agents.
  • (10) Structural peculiarities in tubulin polymorphism are considered.
  • (11) We report a series of experiments designed to determine if agents and conditions that have been reported to alter sodium reabsorption, Na-K-ATPase activity or cellular structure in the rat distal nephron might also regulate the density or affinity of binding of 3H-metolazone to the putative thiazide receptor in the distal nephron.
  • (12) It is likely that trunk mobility is necessary to maintain integrity of SI joint and that absence of such mobility compromises SI joint structure in many paraplegics.
  • (13) Fluorination with [18F]acetylhypofluorite yields 6-[18F]fluoro-L-dopa with 95% radiochemical purity; fluorination of the same substrate with [18F]F2 yields a mixture of all three structural isomers in a ratio of 70:16:14 for 6-, 5-, and 2-fluoro compounds.
  • (14) But the wounding charge in 2010 has become Brown's creation of a structural hole in the budget, more serious than the cyclical hit which the recession made in tax receipts, at least 4% of GDP.
  • (15) The aetiological factors concerned in the production of paraumbilical and epigastric hernias have been reviewed along structural--functional lines.
  • (16) The disassembly of the synthetase complex is consistent with the structural model of a heterotypic multienzyme complex and suggests that the complex formation is due to the specific intermolecular interactions among the synthetases.
  • (17) In addition to the phase diagrams reported here for these two binary mixtures, a brief theoretical discussion is given of other possible phase diagrams that may be appropriate to other lipid mixtures with particular consideration given to the problem of crystalline phases of different structures and the possible occurrence of second-order phase transitions in these mixtures.
  • (18) The structures of 1 and 2 were established mainly on the basis of nmr spectroscopic data.
  • (19) Determination of the primary structure for factor V has provided the basis for examination of structure-function relationships.
  • (20) Aside from these characteristic findings of HCC, it was important to reveal the following features for the diagnosis of well differentiated type of small HCC: variable thickening or distortion of trabecular structure in association with nuclear crowding, acinar formation, selective cytoplasmic accumulation of Mallory bodies, nuclear abnormalities consisting of thickening of nucleolus, hepatic cords in close contact with bile ducts or blood vessels, and hepatocytes growing in a fibrous environment.

Topology


Definition:

  • (n.) The art of, or method for, assisting the memory by associating the thing or subject to be remembered with some place.

Example Sentences:

  • (1) The scheme is based on topological information, i.e.
  • (2) These results provide knowledge of the interrelationships between antibiotic and substrate ribosome binding sites which should eventually contribute to a map of ribosomal topology.
  • (3) The conformational properties of these new TASPs are now under investigation, with special emphasis on the relationship between overall conformation and the nature of the topological template.
  • (4) In the context of a simplified diamond lattice model of a six-member, Greek key beta-barrel protein that is closely related in topology to plastocyanin, the nature of the folding and unfolding pathways have been investigated using dynamic Monte Carlo techniques.
  • (5) At the Second Scandinavian Congress on Image Analysis in 1981 Kohonen provided evidence that the map of signals has the same topological order as the map of reactions.
  • (6) Phylogenetic analysis of the aligned sequences by both phenetic and cladistic methods with H. perryi as an outgroup generated one best topology which pairs S. alpinus with S. malma as the most recently derived species, and pairs S. confluentus with S. leucomaenis.
  • (7) Then, a 'hyperstructure matrix' is generated, containing the unique topological relationship between every pair of regions.
  • (8) Linear DNA substrates in which pairing is topologically restricted to a paranemic joint also follow this relationship.
  • (9) The subgroups of carcinoma of the bladder, determined by topology, have markedly different long-term prognoses.
  • (10) The fluorescence properties of Hoechst 33342 (HO 33342) were examined with plasmid pBR322 in the supercoiled (Form I) or relaxed covalently closed circular (Form Io) conformation in order to determine whether qualitative or quantitative differences in fluorescence properties might provide an assay for topological states of DNA.
  • (11) An exhaustive search of all possible trees also supported this topology, although one haplotype had to be eliminated from this analysis to save computer time.
  • (12) This superfamily of proteins is predicted to share the topology of the seven transmembrane helices of bacteriorhodopsin (BR), even though no significant sequence homology had been identified.
  • (13) These data demonstrate the utility of this approach for determining membrane protein topology and extend potential applications to include at least some proteins not normally expressed in E. coli.
  • (14) The unique topology of the products indicates that resolvase fixes the sum of the number of supercoils between recombination sites at synapsis and the number of such supercoils lost or gained during strand exchange.
  • (15) Such explanations are possible because the relatively few structural proteins of the erythrocyte are regularly distributed over the entire cytoplasmic surface of the cell membrane and because the well-understood topological associations of these proteins seem to be stable in comparison with the time required for the cell to change shape.
  • (16) The objectives of the present investigations were to document a composite, new approach for the evaluation of the structure-function dependencies of proteins based on the analysis of the informational content of the primary amino acid sequence as well as the topological and functional regions of a protein.
  • (17) When the input topology is supercoiled, high levels of transcription are observed, whereas input relaxed DNA is transcribed to a much lower extent.
  • (18) It is believed that one or more basic residues at the extreme amino terminus of precursor proteins and the lack of a net positive charge immediately following the signal peptide act as topological determinants that promote the insertion of the signal peptide hydrophobic core into the cytoplasmic membrane of Escherichia coli cells with the correct orientation required to initiate the protein export process.
  • (19) We observe that the effect of osmotic shock is an elevation of superhelical tension; quantitative comparison with changes in plasmid linking number indicates that the alteration in DNA topology is all unconstrained.
  • (20) Anomalous correspondence most probably has its seat where the retinal topology is not exact, i.e., where the binocular receptive fields are very large and encompass the corpus callosum, such as in area 20 or 21.