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Blobs are sections of primary visual cortex (V1) above and below layer IV where groups of neurons sensitive to color assemble in cylindrical shapes. They were first identified in 1979 by Margaret Wong-Riley in cats when she used a cytochrome oxidase stain, from which they get their name. [1]
For example, by proceeding beyond the first delimiting saddle point a "grey-level blob tree" can be constructed. Moreover, the grey-level blob detection method was embedded in a scale space representation and performed at all levels of scale, resulting in a representation called the scale-space primal sketch .
Substructural filters defined in SMARTS have been used [7] to identify undesirable compounds when performing strategic pooling of compounds for high-throughput screening. The REOS (rapid elimination of swill) [ 8 ] procedure uses SMARTS to filter out reactive, toxic and otherwise undesirable moieties from databases of chemical structures.
The Chemistry, Biology, Physics and Design Technology was last updated for first teaching in September 2014, with syllabus updates (including a decrease in the number of options), a new internal assessment component similar to that of the Group 5 (mathematics) explorations, and "a new concept-based approach" dubbed "the nature of science". A ...
In this technique, the response of the sample is measured and recorded, for example, using an electrode selective for the analyte. Then, a small volume of standard solution is added and the response is measured again. Ideally, the standard addition should increase the analyte concentration by a factor of 1.5 to 3, and several additions should ...
A mnemonic is a memory aid used to improve long-term memory and make the process of consolidation easier. Many chemistry aspects, rules, names of compounds, sequences of elements, their reactivity, etc., can be easily and efficiently memorized with the help of mnemonics.
The project was developed primarily by academics and teachers in private and selective schools, in the context of the early objective of having comprehensive schools provide a "grammar school education for all", [41] [n 4] and the first two years of Nuffield physics and chemistry were found to be difficult even for able pupils.
The H 2 O is left out, as it is the solvent and its concentration remains high and nearly constant. J. W. Gibbs suggested in 1873 that equilibrium is attained when the "available energy" (now known as Gibbs free energy or Gibbs energy) of the system is at its minimum value, assuming the reaction is carried out at a constant temperature and ...