PMC:7796291 / 9166-9501 JSONTXT

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{"target":"https://pubannotation.org/docs/sourcedb/PMC/sourceid/7796291","sourcedb":"PMC","sourceid":"7796291","source_url":"https://www.ncbi.nlm.nih.gov/pmc/7796291","text":"2.3. Electrostatic Force Measurement\nThe surface potential of filter media was measured using an electrostatic voltmeter (Model 542A, Trek, Lockport, NY, USA), by holding the filter media in the air. A charge-monitoring probe was placed 4 cm above the web surface, and the surface potential was measured by line-scanning over the area.","divisions":[{"label":"title","span":{"begin":0,"end":36}}],"tracks":[{"project":"LitCovid-sentences","denotations":[{"id":"T80","span":{"begin":0,"end":4},"obj":"Sentence"},{"id":"T81","span":{"begin":5,"end":36},"obj":"Sentence"},{"id":"T82","span":{"begin":37,"end":199},"obj":"Sentence"},{"id":"T83","span":{"begin":200,"end":335},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"attributes":[{"subj":"T80","pred":"source","obj":"LitCovid-sentences"},{"subj":"T81","pred":"source","obj":"LitCovid-sentences"},{"subj":"T82","pred":"source","obj":"LitCovid-sentences"},{"subj":"T83","pred":"source","obj":"LitCovid-sentences"}]}],"config":{"attribute types":[{"pred":"source","value type":"selection","values":[{"id":"LitCovid-sentences","color":"#eccc93","default":true}]}]}}