The Atomic Spectra Database (ASD) contains data for radiative transitions and energy levels in atoms and atomic ions. Data are included for observed transitions of 99 elements and energy levels of 52 elements. ASD contains data on about 900 spectra from about 1 (ngstrms) to 200 µm (micrometers), with about 70,000 energy levels and 91,000 lines, 40,000 of which have transition probabilities listed. The most current NIST-evaluated data associated with each transition are integrated under a single listing.
Physical Reference Data of the NIST Physics Laboratory, including physical constants, and other data re: atomic and molecular spectroscopy, ionizing radiation and dosimetry, nuclear and condensed matter physics, and more.
Electron Interactions with Plasma Processing Gases data excerpted from recently published articles in the Journal of Physical and Chemical Reference Data (JPCRD). Presented here are collision cross section data and electron transport coefficients for gases, such as CF4 and CHF3, used in the manufacturing of semiconductor devices.
The November 1998 release of The NIST WebBook is the fifth edition of the NIST Chemistry WebBook. It contains thermochemical data for over 5000 organic and small inorganic compounds, reaction thermochemistry data for over 8000 reactions, IR spectra for over 5000 compounds, mass spectra for over 10,000 compounds, electronic / vibrational spectra for over 3000 compounds, constants of diatomic molecules (spectroscopic data) for over 600 compounds, ion energetics data for over 14,000 compounds, and thermophysical property data for 16 fluids. There are many avenues for searching the database. Structures are given for most species, as well as common and commercial names.
The NIST Ceramics WebBook provides evaluated numeric data for physical and structural characteristics, mechanical properties, thermal properties, corrosion, and superconducting characteristics of advanced ceramic materials. The originally PC-based Structural Ceramics Database and the database on High Temperature Superconductors have been made available online, along with an extensive collection of property data tables, a guide to materials data center and sources, a description of the characterization of fracture origins in advanced ceramic materials, and links to other online databases and web sites of interest to the ceramics community.
The Thermodynamics of Enzyme-Catalyzed Reactions database contains thermodynamic data on enzyme-catalyzed reactions that have been recently published in the Journal of Physical and Chemical Reference Data (JPCRD). For each reaction the following information is provided: the reference for the data, the reaction studied, the name of the enzyme used and its Enzyme Commission number, the method of measurement, the data and an evaluation thereof.
NIST Special Publication 922, Polycyclic Aromatic Hydrocarbon Structure Index, is presented by the Chemical Science and Technology Laboratory as an aid in the identification of the chemical structures and nomenclature of 660 common (and not so common) polycyclic aromatic hydrocarbons (PAHs). This electronic version of the Structure Index allows you to browse or search to display name(s), chemical structures, Chemical Abstracts Service (CAS) Registry numbers, molecular weights, and molecular descriptors.
The Biological Macromolecule Crystallization Database and NASA Archive for Protein Crystal Growth Data (BMCD) contains the conditions reported for the crystallization of proteins and nucleic acids used in X-ray structure determinations and archives the results of microgravity macromolecule crystallization studies.
The NIST/CSTL/PMD Reacting Flows Group has developed a WWW accessible, interactive site for chemical kinetic mechanisms called CKMech. It was developed to make available data in a report entitled Thermochemical and Chemical Kinetic Data for Fluorinated Hydrocarbons. These data were compiled, reviewed, and evaluated for a project entitled Flame Inhibition Chemistry and the Search for Additional Fire Fighting Chemicals that was sponsored by the Air Force and other agencies.
The Lipid Thermotropic Phase Transitions Database is a relational database of thermodynamic and associated information on lipid mesophase and crystal polymorphic transitions. There are 19,957 records in LIPIDAT.The data are presented in two broad categories in the literature, and the database project includes two foci to reflect this. Numerically reported phase transition temperatures and enthalpies comprise the first category, and phase diagrams the second. Presented here is the first half of the database project, the tabulation of phase transition temperatures and enthalpies (LIPIDAT). The database is considered comprehensive for glycerophospholipids, glycoglycerolipids, sphingolipids and natural membrane extracts through December, 1996. An update is in preparation. The database includes lipid molecular structures.
The NIST Database for the Isotopic Composition of Selected Atmospheric Constituents contains over a thousand reported measurements of CH3D, 13CH4, and 14CH4 at sources and in tropospheric air. These isotopic data are useful to modelers who quantify the global or regional methane budgets by comparing the isotopic compositions of methane in ambient air with the isotopic compositions of the aggregate of flux-weighted sources. Temporal and spatial isotopic variations in the database are also useful for distinguishing the types of methane in subsurface natural gas exploration and for understanding wetland methanogenic pathways.
You will be able to search on a specific database record number. A database record contains all of the information on a specific sample: numeric information such as measured values and sampling/measurement uncertainties as well as ancillary text information such as collection/measurement procedures and how the data were interpreted when first reported.
Questions and comments: srdata@nist.gov
Last Update: Thursday, 03-Jun-99 14:18:02