Between June and December 2013, the study team invited physicians to take the study at departmental meetings for select departments at the four largest public hospitals in Singapore, and sent email requests to physicians via electronic mailing lists maintained by select medical groups.
Though the interactions are entirely mechanistic when considered at the molecular level of description, a fully adequate explanation of why such properties would be selected and maintained by selection requires, in addition, the semiotic level of description.
A sample of 19 mothers who had infants 7 12 months of age were selected from registers maintained by the selected VHWs.
Thus, selection either maintains existing alleles over long periods of time (balancing selection) or maintains diversity by selecting against fixation of existing alleles (diversifying selection).
A vector containing this reporter cassette, together with a Tgdhfr/ts selection marker for antimalarial drug resistance, was then introduced into P. berghei schizonts by electroporation, and maintained as episome by selecting for the resistance marker.
We then bootstrapped a null distribution, by randomizing the CGH regions (within their original chromosome and maintaining region size), by selecting a random CGH probe as the new starting point.
Such articles were listed in databases like PubMed, which is maintained by the National Library of Medicine, and selected for their quality.
The first stage uses the master sampling frames maintained by the Kenya National Bureau of Statistics to select data collection points, also referred to as clusters or sample units.
Two sequence forms of microRNAs are systematically maintained by miRBase, which was selected as the reference resource for O2EM: the hairpin sequence, which is the precursor microRNA, and the mature microRNA, which is biologically processed from the hairpin and the regulating molecule.
