I know Chris was going to do a bit on this but ill post my findings as well
Each research line has 10 levels.
The amount of Research points gained per kill is capped at (roughly) 5% of a research level.
So far I've got the following (in XP, 1SK = 1000XP)
Code: Select all
Level     Cap per kill    Total required for a level to be "trained"
Level 1   2,500           50,000
Level 2   22,500          400,000
Level 3   80,000          1,600,000
Level 4   235,000        4,700,000
Level 5   637,500        12,750,000