Don't try to read the article straight through from beginning to end! First take a look at these websites that provide some tips on how to approach a scientific article so you can maximize your chances of understanding what you are reading:
Characteristics of Most Scientific Articles
Look at the article. In general, scientific articles:
If an article is only 2 pages long, has no references (bibliography), and you understand it without looking up some of the words, then it is not presenting scientific research. It's just talking about it.
If your article looks good so far, then take a closer look. Most scientific research is divided into distinct, easily recognizable sub-sections. Here are some of the subheadings to look for:
If the article has three or more of these subheadings, then it almost certainly is an article presenting original scientific research.