51.   Those molecules would be powerful research tools, or the beginnings of new drugs.

52.   Today, they are research tools.

53.   Travel Facts calls itself a research tool.

54.   You may not get a good answer from any single source, but all the salary research tools together should put you in the ballpark.

55.   And blood drawn from the crab is a significant medical research tool, allowing pharmaceutical makers to test the purity of drugs.

56.   Indian officials said they exploded devices, not bombs, differentiating between a weapon and a research tool.

57.   The Internet was mostly a research tool for government and universities.