The phrase "a number of substrates" is correct and usable in written English.
It can be used when referring to multiple types or instances of substrates in a scientific or technical context.
Example: "In our experiment, we tested a number of substrates to determine which one provided the best results for plant growth."
Alternatives: "several substrates" or "various substrates".
A number of substrates like wheat straw, corn and sawdust can be used for its cultivation.
SIRT1 is the most widely studied sirtuin, which deacetylates a number of substrates such as PGC-1α.
The enzymatic and structural properties of the recombinant enzyme were investigated and the kinetic parameters (Km, kcat) for a number of substrates were determined.
Several workers have tested a number of substrates under different operational conditions and brought forward the many positive process performance features and identified the main sources of inhibition.
Upon activation, ERK phosphorylates a number of substrates including kinases and transcription factors that mediate entry and progression through the cell cycle, inhibition of differentiation, protein translation and suppression of apoptosis [16].
Bi2Se3 and Bi2Te3 thin films have been successfully grown on a number of substrates such as Si, sapphire, graphene, and on mica by both molecular beam epitaxy and chemical vapor deposition [53 57].
A TiN coating was deposited using ion-assisted PVD onto a number of substrates with differing combinations of modulus and hardness [i.e. a range of Young's modulus (E) to yield stress (Y) E/Y ratios].
Smooth surfaced polyester films were prepared by solution casting against a number of substrates ranging from high surface energy (aluminium, mercury, glass and freshly-cleaved mica) to low surface energy (poly ethyleneterephthalate)(PET), poly tetrafluoroethylene)(PTFE) and dry nitrogen gas).
Thin films of the zinc nickel ferrite, Zn0.7Ni0.3Fe2O4 (ZNFO), were deposited by the RF magnetron sputtering on a number of substrates, including (001) oriented single crystals of LaAlO3 (LAO) and SrTiO3 (STO), polycrystalline Pt/Si, and epitaxial films of BiFeO3 (BFO) and LaNiO3 (LNO).
Integrated acoustic wave sensing/microfluidic devices have been fabricated by depositing these piezoelectric films onto a number of substrates such as silicon, ceramics, diamond, quartz, glass, and more recently also polymer, metallic foils and bendable glass/silicon for making flexible devices.
Systematic observation of the board files of a number of substrates of commercial interest reveals primarily three recurrent topological arrangements of copper and polymer; for each arrangement, the in-plane effective thermo-elastic properties are calculated via appropriate composite materials models.
