Sulfobetaine zwitterionic groups were introduced into a terpolymer, and electrospun nanofibers were fabricated for the removal of particulate matter PM in air streams. Because of the presence of these zwitterionic groups, the nanofibers also show excellent antibacterial activity. The synergistic effect of zwitterionic polar functional groups having a high dipole moment and a small diameter of the nanofibers ensures that the filtration material is the most suitable candidate for proficiently capturing PM particles. It has been noticed that these research efforts nowadays primarily focus on the nanomaterials-based platforms owing to their simplicity, reliability, and feasibility.
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ACS Applied Nano Materials | Vol 4, No 2
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Relative dating is the science of determining the relative order of past events i. In geology, rock or superficial deposits , fossils and lithologies can be used to correlate one stratigraphic column with another. Prior to the discovery of radiometric dating in the early 20th century, which provided a means of absolute dating , archaeologists and geologists used relative dating to determine ages of materials. Though relative dating can only determine the sequential order in which a series of events occurred, not when they occurred, it remains a useful technique.