i think 'instrumental' is the word that you need here:

instrumental |ɪnstrʊˌmɛnt(ə)l| adjective
1 serving as an instrument or means in pursuing an aim or policy : the society was instrumental in bringing about legislation.

• relating to something's function as an instrument or means to an end : a very instrumental view of education and how it relates to their needs.

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Note added at 14 mins (2006-08-18 17:34:05 GMT)
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This analysis is instrumental in finding out whether particular. policies are worthwhile and the weight of the evidence may lead to a policy change ...
statistics.defra.gov.uk/ esg/evaluation/planth/chapter8.pdf

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Note added at 16 mins (2006-08-18 17:36:05 GMT)
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... that these interactions are instrumental in determining the preferred conformation of individual molecules and in the packing of molecules in crystals. ...
www.ch.qub.ac.uk/staff/malone/jfm.html

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Note added at 19 mins (2006-08-18 17:39:03 GMT)
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по-моему, хоть оно и лежит в основе, но им еще пользуются для чего-то еще...

...whether or not there are any resonances in the system.

Suggestion.

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Note added at 1 hr (2006-08-18 18:25:48 GMT)
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http://www.aclunc.org/aclunews/news52000/sacramento.html
http://www.thegabrielfoundation.org/Sanctuary/SanctuaryStart...

just another 2 cent's worth.

Why make a big deal out of nothing - KISS principle!

Hittite Online
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