About the Biochemical Periodic Tables
traditional periodic table and the spiral periodic table. The spiral table is a more biologically relevant representation of the chemical elements, as it places hydrogen in a central position clustered with the other primary components of biological molecules (carbon, nitrogen, oxygen, phosphorus, and sulfur). The content accessed through the traditional and spiral tables is identical.
Individual element pages, which can be accessed by clicking element symbols in the periodic tables, contain a summary of known microbial interactions with the selected element based on reports published in scholarly journals. The purpose of the summaries is to describe all known types of interactions of a particular element with microorganisms (bacteria, archaea, fungi, and in some cases algae or other microscopic eukaryotes), but not to provide a comprehensive review of each type of interaction. In addition to biological function, described interactions with elements may also include bioreduction, bioalkylation, bioprecipitation, bioaccumulation/biosorption, and enzyme binding/activation. Some pages also contain links to additional information on topics such as toxicity or geocycling of the element.EAWAG-BBD home page. The spiral periodic table can be reached by a "Spiral Table" link at the bottom of that page. Both can also be reached by using the following URL's: http://umbbd.ethz.ch/periodic/index.html and http://umbbd.ethz.ch/periodic/spiral.html. To view individual element pages, click on an element's symbol in either of the periodic tables. Individual element pages can also be accessed by clicking on Links at the bottom of either periodic table, and then clicking on the name of an element in the list. The "Links" page also lists links to web pages outside the EAWAG-BBD server that are included in individual element pages, with the exception of links to WebElements and PubMed, which are considered standard and are not listed here.
Each individual element page contains a link (the "Chemical Properties" bar to the left of the element symbol) to information compiled in WebElements on chemical and physical properties of the element. If metabolism of compounds containing an element (or biotransformation of an element) has been described in the EAWAG-BBD, a link (the "Compounds in the EAWAG-BBD" bar to the right of the element symbol) is provided to the list of compounds contained in the database. Sources of information used to compile the summary of microbial interactions with the element are cited in the text and are linked to abstracts indexed in PubMed when available. Each element page also includes a link to a dynamic search of PubMed for microbial interactions with that element. Run the dynamic search by clicking "Search" under "For More Information". Updates to the biochemical periodic tables are announced monthly in conjunction with other EAWAG-BBD updates. The list of updates is emailed to EAWAG-BBD subscribers and can also be viewed by clicking What's New at the left of the EAWAG-BBD home page and at the top and bottom of associated pages.
PubMed and Chemical Abstracts. Citations for articles referenced in the summary that are not indexed online are listed under "For more information". Because the summaries in individual element pages are not intended to be exhaustive overviews, review articles are cited when available. Attempts are made to thoroughly search for information on all potential types of interactions with microorganisms, but we recognize that we may miss important references. We appreciate being informed of any inaccuracies or omissions in the element pages. Contact Us with any comments or suggestions.