Related NIST Databases

In support of the comprehensive ASD database, the NIST team has also 

Furthermore, a bibliographic database on wavelengths and atomic energy 

Lines LeVeU SpcV lRA mKJ uSulSEmin(b% BiblioQnopliy Help 

NIST Atomic Spectra Database Lines Form 

select spectra from the List of I foldings, or select spectra using a selection form, or choose All Spectra. 

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A limitation of printed databases is that they may become outdated once published, they are unable to incorporate new information on kinetic parameters. The combustion specific databases listed above were published in the period 1973 to 1994 the most recent [23] covers the literature through 1992. This implies that data on combustion related reactions published since 1992 are not considered in these evaluations, and for a number of significant reactions the recommendations may be misleading. This deficiency of printed databases is to some extent overcome by the electronic database [256] offered by National Institute of Standards and Technology (NIST). The NIST database,1 which is regularly updated, also references most of the expert evaluations listed above. The drawback of using these kinds of data compilations is that the user may have to perform some data evaluation, that is, choose between data from various sources. 

Structures related to ethanediol are in italics Identified by comparison with NIST database Identified by mass spectrum analysis. Compound not present in the NIST database El Electron ionisation NIST National Institute of Science and Technology Reproduced with permission from G. Gallet, B. Erlandsson, A-C. Albertsson and S. Karlsson, Polymer Degradation and Stability, 2002, 77, 55. 2002, Elsevier [47] ... 

Reliable tables that list many known surface stmetures can be found in [1]. Also, the National Institute of Standards and Teclmology (NIST) maintains databases of surface stmetures and other surface-related infonnation, which can be found at httpsov/srd/surface. htm. 

At this moment, the NIST Chemistry WebBook and the Beilstein are the two most useful search tools for molecular structure and property relations. There are many more types of properties available in the research literature of interest only to a smaller set of readers these will not be listed in the general-purpose handbooks, but are to be found in specialized books and journals. Our ability to search for such properties in the research literature on the Internet is increasing rapidly, and students should practice doing such searches. Many of the required properties have not been tabulated in a searchable electronic database for example, flammability, toxicity, ozone hole potential, and greenhouse gas potential. Information on health, safety, and the environment that is publicly available on websites is listed in the references. 

Three main spectra collections now exist. The first is the NIST/EPA/NIH mass spectral database, which contains 190 000 spectra of 163 000 compounds [1]. This original collection of spectra and related information is produced by the National Institute of Standards and Technology (NIST) with the assistance of expert advisors from the Environmental Protection Agency (EPA) and National Institutes of Health (NIH). This library is available on CD-ROM for personal computers with integrated tools for GC/MS deconvolution, mass spectra interpretation and chemical substructure identification. This US government publication is very cheap and of very high quality. This library is widely spread in many commercial mass spectrometers. Mass spectra for over 15 000 compounds are accessible on-line [2],... 

Because some mechanical properties depend on how the material was tested, it is important and necessary to establish specified test methods. Standard test methods have been adopted for ceramics. In the United States ASTM International (originally the American Society for Testing and Materials, ASTM) is the primary organization developing standards for materials testing. ASTM Committee C-28 on Advanced Ceramics has completed several standards and ones related to mechanical properties and testing are listed in Table 16.1. Specialized subcommittees work on specific areas within the field of advanced ceramics. Coimnittee C28.01 is involved with standards related to mechanical properties and performance of monolithic ceramics. Committee C28.02 deals with reliability issues. The National Institute of Standards and Technology (NIST) has established several free databases that list mechanical properties of ceramics. 

A useful starting point for accessing the literature is the NIST Chemical Kinetics Database [11], available online at http //kinetics.nist.gov. According to the introduction to the database, it includes essentially all reported kinetics results for thermal gas-phase chemical reactions. Thus, by searching this database, one can find references related to almost any gas-phase reaction for which reaction rate measurements have been made. Of course, it will not provide information about the vast number of reactions that have been observed and reported in the Uterature, but for which reaction rates have not been measured. As an example, suppose we are interested in the thermal decomposition of AICI3 or in the combustion of aluminum. We might expect the species AlCl to be an important... 

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