A primary research article presents a first report of original research. It's written by the people who performed the research, and it's usually written for other researchers in the same field.
Example of a primary research article: Bramhanwade, K.; Shende, S.; Bonde, S.; Gade, A.; Rai, M. Fungicidal activity of Cu nanoparticles against Fusarium causing crop diseases. Environmental Chemistry Letters 2016,14, 229-235.
The structure is designed to be a practical and efficient means of delivering information. It also ensures that key points will be covered in the article, including:
A scholarly review article is a special type of peer-reviewed article that provides an overview of an area of research; it describes major advances, discoveries, and ongoing debates in that field. It can be very useful to look for review articles if you are new to an area of research.
Example of a scholarly review article: Kasana, R. C.; Panwar, N. R.; Kaul, R. K.; Kumar, P. Biosynthesis and effects of copper nanoparticles on plants. Environmental Chemistry Letters 2017,15, 233-240.