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The GEMs database can be searched three ways:

  1. by category or categories
  2. by keywords(s)
  3. by category(ies) and keywords.

Search by Category or Categories

If you are new to green chemistry or if you want to browse materials available in the GEMs database, search by category.

To begin:

  1. Click on the category you want to use in your search (e.g., Chemistry Concepts, Laboratory Techniques, etc.) You can search by multiple categories but you must add category terms to your search one category at a time.
  2. Check the box(es) next to the category terms you want to use. These terms will be added to Your Search Terms, located on the right side of the page.
  3. Once you have added all the terms you want to search by to Your Search Terms, click Search at the bottom of the window. This will take you to a page of results. These results are sorted by Date — most recent first. You may change the sort order by clicking on the column headings. You can sort by Type, Title, Date, and Source.

Search by Keyword(s)

If you are looking for materials covering a specific topic, you may want to conduct a keyword search.

To begin:

  1. Enter the keyword terms you want to search by in the Keyword field at the bottom of the Your Search Terms pane. You can enter multiple keyword terms and standard MySQL operators (+, -, ...etc) to build your search. (Note that searching for "-apple" by itself does not return all entries not having "apple" in them - it returns no rows.)
  2. Click Search below to submit your search. This will take you to a page of results. These results are sorted by Date — most recent first. You may change the sort order by clicking on the column headings. You can sort by Type, Title, Date, and Source.

Search by Category(ies) and Keywords

For a more advanced search, you can search GEMs items by creating a combined category/keyword search.

To begin:

  1. Click on the category you want to use in your search. You can search by multiple categories but you must add category terms to your search one category at a time.
  2. Check the box(es) next to the category terms you want to use. These terms will be added to Your Search Terms, located on the right side of the page.
  3. Enter the keyword terms you want to search by in the Keyword field at the bottom of Your Search Terms. You can enter multiple keyword terms and standard MySQL operators (+, -, ...etc) to build your search. (Note that searching for "-apple" by itself does not return all entries not having "apple" in them: it returns no rows.)
  4. Click Search below to submit your search. This will take you to a page of results. The results returned are computed as follows: 1) the category search is done by itself, 2) then the keyword search is done by itself, 3) If no results are returned by the keyword search, then the results from the category search are used. If no results are returned from the category search then the results from the keyword search are used. If both category and keyword searches have produced results, then the results returned are: all items that are in both the category results and the keyword results. In more formal terms it is the intersection of the category results and the keyword results that are displayed on the page. These results are sorted by Date — most recent first. You may change the sort order by clicking on the column headings. You can sort by Type, Title, Date, and Source.

To Refine your Search

To remove terms from your search, uncheck the box next to the term in Your Search Terms. This will remove this term from your search.

To add new terms or keywords to a search, follow the steps above.