Abstract: Aptamers and methods for detecting a target molecule/analyte in a sample are disclosed herein. The aptamer can include a single-stranded deoxyribonucleic acid (DNA) strand that includes an oligonucleotide sequence with bases identical at least about 60% to TAATTGTGGTTCGTGTAAA (SEQ ID NO: 1). The aptamer can be configured to bind the target molecule/analyte with a dissociation constant between about 10?9 and about 10?3 M.

Abstract: A turbine wheel meter with a meter housing having a lateral opening, with a measuring insert including an impeller, and a flow regulator being inserted in a duct of the meter housing. The measuring devices can, without removing the same from a length of conduit, be installed, exchanged, and calibrated outside of the meter housing by a corresponding structure of the flow regulator in relation to a discontinuity or gap in the duct, by a plug-in and centering arrangement provided on opposed end faces of the measuring device and the flow regulator device, by a flaring portion of the duct in conjunction with a counter shoulder of the flow regulator, as well as by the use of a clamping element.