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University of Southern MaineLibraries

CHY 385: Fermentation: Home

Interlibrary Loan

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  • If you get an error message when trying to register that says "blocked due to user not found" you can call the library front desk at 207-780-4270 and tell them you need to activate your ID for library use. Most happen automatically at the card office but it seems a few slip through the cracks. You'll just need to give them your name and your ID bar code (the black number at the bottom of your ID)

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Key Resources in Chemistry

Below are just a few of our databases useful for chemistry research. For more databases with chemical sciences content, check out our Databases A-Z page and select "Chemistry" from the drop-down.

Once you have a good understanding of your topic and have selected a few keywords, OneSearch is a great place to start your research! OneSearch is a convenient way to search almost all of the library’s resources using a single search box. 

Below are a few of the "top" journals in chemistry by the number of times their articles have been cited. To see many more journals in chemistry, including sub-specializations, see our Journals by Title page and select "Physical Sciences & Mathematics" under Browse By Subject. On the results page a variety of Chemistry sub-disciplines are listed.

You can search for books in our library and other libraries using the links below. If you're not sure how to find what you're looking for, ask us!

In-text citations:

References in the text should be cited in one of three ways:

  • by an italic number - e.g. "Chemistry is great! (2)"
  • or by superscript number - e.g. "Chemistry is great! 2"
  • or by author name and date - e.g. "Chemistry is great! (Lucchesi, 2017)"

If using numbers, references should be numbered sequentially.  If a reference is used more than once in your text, it does not need a new number each time; use the original number assigned to it.  If citing more than one reference at a time, include reference numbers in increasing order separated by commas.


If you used numbers for your in-text citations, arrange your bibliography in numerical order (so that in-text citation 1 is listed first, in-text citation 2 is listed second, etc). If you used author name and date for your in-text citations, arrange your bibliography is alphabetical order by author's last name. ACS reference formatting for bibliographies from UW-Madison has excellent examples of citation formats for every source type (books, journal articles, websites, etc).

Searching Tips and Tricks

  • Most databases allow for searching with Boolean operators (AND, OR, NOT).
    • Use AND to focus your search and combine different aspects of your topic
    • Use OR to broaden your search and find sources that use different words for the same concept.
    • Use NOT to omit certain terms from your results.
  • Use an asterisk (*) to truncate words if you want to search for all words with that root. For example, “environment*” would search for environment, environmental, environmentalism, etc.
  • Put quotes around a phrase that you want the database to search as a phrase, rather than as individual words.
  • Group synonyms inside parentheses using OR between each one


URSUS is the combined library catalog for the entire University of Maine system. You can search the entire system, or select University of Southern Maine Libraries in the drop-down.

Other helpful tips:

  • If you find a book that is relevant to your needs, look at the "Subject" area of the book's record. Click on a few of the subjects to find other similar books.
  • In many of the book records, you can look at the table of contents - click the link under the "Inside This Book" heading. This can help you determine if a book is right for your research.
  • If USM doesn't have a book you want, click the "Request" button at the top of the page and we can get it for you through interlibrary loan.

Most databases, as well as URSUS and MaineCat, assign subjects to books and articles. A subject is a designated word or phrase that describes an idea or concept and groups all articles or books about that concept together.

  • Subjects are also variously called descriptors, controlled vocabulary, headings, or index terms.
  • To search by subject you have to know the exact subject term. Most databases that use subjects have a Thesaurus that you can use to look up subject terms. You can also do a keyword search, find a book or article that is relevant to your research, and look at the subject terms assigned to it.
  • URSUS and MaineCat use Library of Congress Subject Headings and each database has their own list of subject headings, so you have to look up subjects in each database independently.

There are many ways you can get research materials from other libraries. In the vast majority of cases, there is no charge to you for this service!

  • From URSUS, use the  button at the top of an item's page.
  • From MaineCat, use the  button in the middle of an item's page.
  • From a database:
    • Select the item you want and find and click the  or "Article Linker" button (the placement on the page will vary by database).
    • If the library does not have access to the item, find and click the "Submit an Interlibrary Loan Request" link under Step 3 in the right panel.

Chemistry Research News Feed

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