The phrase "a last step of" is correct and usable in written English.
It can be used when referring to the final action or stage in a process or sequence.
Example: "Before we can finalize the project, we need to complete a last step of reviewing all the documents."
Alternatives: "a final step of" or "the concluding step of".
These issues, including a last step of near net-shaped manufacturing of complex geometries, are discussed in this Viewpoint paper.
In the chemical processing industry these separations are applied usually for the purification of the products, recycling of solvents or catalysts, etc. and are placed as a last step of a production process, after the chemical reactor(s).
As a last step of the validation, the issues identified are corrected through discussed among the task analysts and SMEs.
As a last step of preprocessing, smoothing was applied to all scans using three different filter kernels: [10 mm]3, [20 mm]3, and [30 mm]3.
PCR reaction was performed using phusion high-fidelity PCR Mastermix (New England Biolabs LTD., Beijing, China) with the following condition: 94 °C for 3 min (1 cycle), 94 °C for 45 °C50 °C for 60 °C72 °C for 90 s (35 cycles), and a last step of 72 °C for 10 min.
A possible explanation is that a failure to contradict a given thesis can be made explicit by adding the negation of the thesis as a last step of the deduction, thereby insuring the contradiction of the thesis, but only at the cost (by the last step) of introducing one of the other twelve fallacies in the deduction.
A refined investigation of substance properties is included in a last step to analyse the reliability of the screening method.
In a last step, complexation of this mixture with [RuCp(CH3CN 3]PF6 yielded the corresponding ruthenium complexes from which the target ruthenium complex coordinated to a dissymmetric azobenzene-functionalized tripodal ligand was successfully isolated.
As a last step, resulting zones-of-compliance were compared for two variations in iFT (2.1°, 9.3°).
As a last step, systematic identification of the kernels lead to a structure composed of linear filters, sums, and products which are well-suited to the sound synthesis, using standard signal processing techniques.
As a last step in optimisation of the F2A system, we compared cleavage efficiencies of the most active F2A- and T2A-based constructs (F2A30, F2A20mut3, F2A18mut, and T2Awt) in HeLa cells.
