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In several scientific disciplines, such as biochemistry, physiology, and neuroscience, microscopes were crucial instruments for scientific study. To rectify light wavefront aberrations caused by intrinsic optical system limits and non-uniform sample structures, adaptive optics, or AO, have been employed in microscopes. Sample structures and wavefront aberrations were unknown before imaging, making AO difficult to regulate even though it significantly improves microscope imaging quality.

An estimated 50,000 to 70,000 trees line Salem’s streets, and even more fill the city’s 90 parks. Meet the man who oversees the city's urban forest.

The invasive beetle decimated ash tree populations in U.S. and Canada. Salem officials are tracking its spread to try to protect nearly 1,700 trees.

Salem has issued a fine for the removal of more than 100 trees, including 40 Oregon white oaks, at a 30-acre property in south Salem.

Study provides important insights into early stages of SARS-CoV-2 infection Researchers in the UK have provided important new insights into the early stages of infection with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) – the agent that causes coronavirus disease 2019 (COVID-19). The team’s quantitation of SARS-CoV-2 replication dynamics at the single-cell level revealed a previously unrecognized variability among cells in supporting SARS-CoV-2 replication. The researchers were also surprised to find that the SARS-CoV-2 variant of concern B.1.1.7 (Alpha) that first emerged...