Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.


The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation

Search Page

My NCBI Filters
Results by year

Table representation of search results timeline featuring number of search results per year.

Year Number of Results
2021 1
2022 4
2023 2
Text availability
Article attribute
Article type
Publication date

Search Results

5 results
Results by year
Filters applied: . Clear all
Page 1
Did you mean kartal a[au] (158 results)?
Isolating the impact of COVID-19 lockdown measures on urban air quality in Canada.
Mashayekhi R, Pavlovic R, Racine J, Moran MD, Manseau PM, Duhamel A, Katal A, Miville J, Niemi D, Peng SJ, Sassi M, Griffin D, McLinden CA. Mashayekhi R, et al. Among authors: katal a. Air Qual Atmos Health. 2021;14(10):1549-1570. doi: 10.1007/s11869-021-01039-1. Epub 2021 May 18. Air Qual Atmos Health. 2021. PMID: 34025821 Free PMC article.