When scientists want to make the results of their work public, they submit an article to a scholarly journal. This is the primary way scientific knowledge is vetted, communicated and preserved for future generations.
Research articles usually contain:
Research articles are NOT good places to find:
Short articles (also called communications or letters) report research in progress and preliminary results likely to be of interest to the scientific community, and establish priority for the authors in advance of full publication. These often undergo expedited review for faster publication. Some journals publish both short and full articles; others publish only short articles.
Articles in scientific journals are written by and for experts, not for beginning students or the general public. Since the authors assume their readers have some advanced knowledge on the subject, reading and understanding these articles can be a bit of a challenge at first when you don't have that expertise. But with a little practice you'll soon learn how to intelligently scan an article and extract the information you need. You don't necessarily have to read it start to finish, and you don't need to understand every little detail. Experienced scientists skip around: they might scan the Experimental and Results sections first, and if those are interesting move on to the conclusions and introduction.
For more tips check out this guide from the Royal Society of Chemistry:
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