INDEX techniques

Data storage and querying are the most fundamental requirements of all informatics systems. Thanks to the Oracle Extensibility Framework (a.k.a. Oracle Data Cartridge Technology), chemical structure data can be stored and queried using direct SQL and special query operators, such as substructure search, flexmatch search, similarity search, and formula search. Also, some indexing techniques make these otherwise slow searches fast. Detailed discussions about these databases and cartridges are beyond the scope of this book. Please refer to the vendor s website and product documentation for more information. 

The effects exhibited in the flow cytometry analysis are also clearly detected by the mitotic index technique (unpublished data), which appears to be an excellent complementary technique in the cell cycle studies using flow cytometry. The mitotic index (see Fig. 12.5) revealed that the cell cycle progression goes slower in BOA-treated meristems than in control meristems and also that the maximum number of cells undergoing cell division is fewer and later in treated meristems (18% at 6 h BOA exposure time) than in control meristems (36% at 4 h distilled water exposure time). 

We are grateful to Dr. Marina Horjales, Dr. Nieves Redondo, and Alfonso Blanco (Faculty of Sciences, University of Vigo) for their help in the optimization of cell cycle analysis and mitotic index technique applied to lettuce. The authors also want to thank Claudia Carcamo and Oliver Weiss for their continual and valuable help in these experiments. Financial support from Ministry of Science and Technology (Spanish Government) is also acknowledged. 

Zone search method begins with searching for one-dimensional and two-dimensional zones and then builds three-dimensional zones using common rows in two-dimensional lattices. When a three-dimensional zone (lattice) is found, it is used in an attempt to index all observed Bragg reflections. This automatic indexing technique is more sophisticated when compared to a trial-and-error approach, but it is still based on Eq. 5.1. First, the analysis of numerical relationships between the observed Q-values is made to identify zones that are invariant with respect to two indices, for example AOO, h 0, OkO and so on. Second, these are combined to identify zones which are invariant with respect to one index and, finally zones where all three indices... 

Lozet, J., Mathieu, C., 1990. Dictionnaire de Science du Sol (with English-French index). Technique et Docum. Lavoisier, Paris, p. 384. 

Classification methods based on substructural descriptors and such index techniques have also been applied in the field of chemical hazards such as toxic effects [167, 168], carcinogenicity [116, 144, 149, 150, 156, 167, 168] and mutagenicity [164, 165, 168, 232] not without success. Attempts are made to provide automated predictions of such hazards for chemical compounds of interest, which is certainly helpful in setting priorities for biological testing. It is important, however, to realize that such predicted data can never be taken for granted and must not be allowed to replace experimental measurements [169]. 

Using the Becke line (or other comparative re fractive-index techniques) determine whether the particle has an index higher or lower than the RI of the liquid. Wash off the liquid and cover glass with a gentle stream of xylene over a container that can be sealed for safe storage and disposal. 

Many years later Weber indicated that the natural rubber molecule was unsaturated since it reacted with bromine to give a material of empirical formula C5H8Br2. This clearly implied an addition reaction to a double bond. This was borne out by the more accurate and reliable iodine chloride method of Kemp in 1927 and the refractive index technique of Macallum and Whitby in 1924. 

In (Hasofer Lind 1974), Hasofer and Lind introduced the reliability index technique for calculating approximations of the desired integral with reduced computation costs. The reh-abUity index has been extensively used in the first and second order rehabiUty methods (FORM (Hohenbichler Rackwitz 1983) and SORM (Fiessler, Neumann, Rackwitz 1979)). 

Chemical Titles, the world s first periodical to be organized, indexed, and composed almost totally by computer, employing the Keyword-In-Context (KWIC) indexing technique... 

Our main conclusion from this timing study is that, with this indexed technique, interactive clustering of several thousand substances should be feasible, especially if a more powerful PC or workstation is used. Also, the clustering of corporate size databases on a long weekend seems realistic. A near neighbor matrix was built for the entire 120K BRS file on a three-day holiday weekend. 

The second approach relies on the expansion of the SC wave function in Slater determinants constructed from non-orthogonal orbitals. The density matrix is calculated from cofactors, constructed in situ using graphical indexing techniques. Calculations have been carried out with this strategy for up to 14 active electrons. It has also been extended recently to include simultaneous optimization of the inactive electrons. ... 

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