Complex sentence: There are 2 kinds of implementations for science 2.0 applications, focusing on collaboration between scientists so they can work together on something bigger, and on research, sharing of papers and improving the communication between researchers.
Split into simpler sentences: There are 2 kinds of implementations for science 2.0 applications, the first one focuses on collaboration between scientists so they can work together on something bigger. The second one focuses on research, sharing of papers and improving the communication between researchers.