Your question is not very clear. The answer is based on my understanding of your question. The website of Current Science states that they publish reasearch articles as well as research communications. I think you are confused about these two article types. As per the website, research articles are original articles that report research results of major significance. These have a word limit of 4000 words and should include an abstract, an introductory paragraph, and brief subheadings. Research communications, on the other hand, are short articles that contain important new findings that are novel and of fairly broad interest. They have a word limit of 2000 words and include a brief abstract and an introductory paragraph. In this type of article, the text should not contain subheadings.