This ppt describes the nitrogen fixation process, which is the first step of the nitrogen cycle. It includes the steps, catalytic process, chemical reaction, energetics, discussion of nitrogenase structure and function...

this contains the definitions of audience, context and purpose, as well as different kinds of texts and the differences between formal and informal english.

This presentation has features of language that are present in AS/A2 English Language. It has different kinds of figurative devices with their examples and explanations and a few practice examples on how to analyse...

This is a note of solomon's fpur group design which a part of statistics module . This note includes a discussion of solomon's four group with an example.