Research (Lord of Ultima)

The following information is taken from the The Great Libraries of Caledonia :

Purified Resources
Research requires gold and purified resources. Purified resources are held across all cities, like gold, but cannot be plundered.

Purified resources can also be gained as a combat reward.

Creating purified resources requires a Moonglow Tower Level 10. A single purified resource can be created by converting 1,000 standard resources.

Purified resources are used for research and increasing player titles.

Research
Gold and purified resources are used in research, which increase the abilities of units. For each level of research, the purified resources you need triples (i.e., Infantry: Travel Speed level 1 costs 500 Trueseed; level 2 costs 1,500 Trueseed). The maximum benefit of research (except title advancement) is a 100% bonus.