Inventory system, chemical sample

Such defect-driven structural transformations are effectively investigated by powder diffraction analysis of samples kept in reactive atmospheres. As solid catalysts are dynamic systems, the phase inventory and the defect ordering (real structure) may well change as a result of changes of chemical potential of a constituent in a reactive environment. Some of the changes are irreversible and can be detected by pre- and postoperation analysis of catalysts, but many are reversible and will not be evident in such experiments. 

Organic-rich extraterrestrial samples such as meteorites, micrometeorites, interplanetary dust particles (IDPs) and samples returned by spacecraft provide a unique record of the chemical processes in the early solar system and in the interstellar medium. In particular, detailed structural and isotopic analyses of carbonaceous meteorites have revealed a rich organic inventory and provided evidence of the synthesis of complex organic molecules in the interstellar medium and on the asteroidal parent bodies of meteorites [1,2], The organic matter in carbonaceous meteorites is present at levels of up to 5% and can be divided into solvent-soluble (l%-25%) and insoluble (75%-99%) fractions, the former characterized by considerable structural, isomeric, and isotopic diversity [2,3], and the latter characterized by a high molecular weight and complex aromatic network [4]. 

A LIMS is a database management system designed especially for the tasks of a laboratory. Such a system can store a lot of data (not only about samples) and give information about the data. In addition to data related to the samples and orders, one can create files on, for example, all laboratory workers, holiday lists, analytical instruments (inventory), all relevant telephone numbers and postal and e-mail addresses, the stock of chemicals in use and in store, the stock of equipment, and books and other literature. As all these files create a requirement for storage capacity and performance, if information is searched for it is perhaps better to use a PC for this purpose. Nearly all the performance of the LIMS computer (server) is needed for the LIMS and should not be used for other activities. Only if there is a powerful computer for the LIMS could the mentioned files be stored in the frame of the LIMS database. 

The three index files provide a cross indexing scheme that allows for flexibility in sequencing and updating. The system may be accessed by 1) accession number, a unique number similar in concept to the CAS registry number, which is assigned by the chemistry update system to each new structural foimula, 2) sample number, which is a unique, sequential number assigned to each physical sample without regard to the chemical structure by the inventory update system, or 3) chemical structures, either whole or sub-structures. 

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