SANTA CLARA, Calif.--(BUSINESS WIRE)--Agilent Technologies Inc. (NYSE:A), today announced the release of eArray 5.4 online microarray design tool, which enables users to design custom microRNA (miRNA) microarrays. miRNA is a rapidly emerging field of study because researchers are increasingly associating these abundant molecules with some types of cancers, heart disease, other disorders and stem-cell differentiation.