English to Russian Science Biology (-tech,-chem,micro-)

Aptamers to a given target include nucleic acids that are identified from a candidate mixture of nucleic acids, where the aptamer is a ligand of the target, by a method comprising: (a) "contacting the candidate mixture with the target",

The mixture "is contacted with a solid support", the solid support having a capture element
multiple target molecules in a test sample can be detected and/or quantified "by contacting the test sample with multiple aptamers"

A test sample is then prepared (as described in the Example) and "contacted with the immobilized aptamers "

Как можно по-человечески перевести глагол contact при использовании в способах
Не хочется "приведение в контакт", обеспечения контакта и т.д.

Спасибо!