The efficiency of surgical masks of varying design and composition / (Record no. 1782)

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fixed length control field 01412nam a22001937a 4500
003 - CONTROL NUMBER IDENTIFIER
control field DOH
005 - DATE AND TIME OF LATEST TRANSACTION
control field 20201120141918.0
008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION
fixed length control field 201120b ||||| |||| 00| 0 eng d
100 1# - MAIN ENTRY--PERSONAL NAME
Personal name Quesnel, Louis B.
245 04 - TITLE STATEMENT
Title The efficiency of surgical masks of varying design and composition /
Statement of responsibility, etc. Louis B. Quesnel
520 3# - SUMMARY, ETC.
Summary, etc. Five different types of surgical mask of varying design and composition of natural and synthetic fibres were tested for their efficiency in vivo by means of a special test chamber. Contaminated particles escaping through or around the mask during speech by the wearer could be collected and sized. Analysis of the data showed that the gross efficiency of all the masks was high, but that some masks were distinctly better at small particle 'filtration' than others. There was a significant difference in efficiency between the best and worst masks. The best masks contained more fabric, were softer and were pleated, while the worst were stiffer, smaller and not pleated. Reusable cotton fabric masks were as effective as synthetic fabric masks when made to a good design.
580 ## - LINKING ENTRY COMPLEXITY NOTE
Linking entry complexity note In: British Journal of Surgery 1975 vol. 62 (12) pages: 936–940.
650 #2 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element Air Microbiology
650 #2 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element Bacteria
General subdivision isolation and purification
650 #2 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element Masks
General subdivision standards
856 ## - ELECTRONIC LOCATION AND ACCESS
Uniform Resource Identifier <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7161878/pdf/BJS-62-936.pdf">https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7161878/pdf/BJS-62-936.pdf</a>
942 ## - ADDED ENTRY ELEMENTS (KOHA)
Koha item type COVID 19 Resource
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Holdings
Withdrawn status Lost status Damaged status Not for loan Home library Current library Shelving location Date acquired Total Checkouts Full call number Barcode Date last seen Price effective from Koha item type
        DOH Central Library DOH Central Library Electronic Resource Section 11/20/2020   COVID-19-000048 D0001C000048 11/20/2020 11/20/2020 COVID 19 Resource