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Journal articles
Delignification of aspen wood with pernitic acid, TAPPI JOUR
Delignification of aspen wood with pernitic acid, TAPPI JOURNAL, June 1994, Vol. 77(6)
Journal articles
High-consistency ozone-bleaching technology, TAPPI JOURNAL, June 1994, Vol. 77(6)
High-consistency ozone-bleaching technology, TAPPI JOURNAL, June 1994, Vol. 77(6)
Journal articles
Mill experience in high-consistency ozone bleaching of southern pine pulp, TAPPI JOURNAL, June 1994, Vol. 77(6)
Mill experience in high-consistency ozone bleaching of southern pine pulp, TAPPI JOURNAL, June 1994, Vol. 77(6)
Journal articles
Optimization of process variables for production of dissolvi
Optimization of process variables for production of dissolving pulps from wheat straw and hemp, TAPPI JOURNAL, June 1994, Vol. 77(6)
Journal articles
Characteristics of paper handsheets after combined biologica
Characteristics of paper handsheets after combined biological pretreatments and conventional pulping of wheat straw, TAPPI JOURNAL, June 1994, Vol. 77(6)
Journal articles
Mechanism of paper tensile-strength development due to pulp
Mechanism of paper tensile-strength development due to pulp beating, TAPPI JOURNAL, June 1994, Vol. 77(6)
Journal articles
A limited consistency model for pulp dewatering and wet pres
A limited consistency model for pulp dewatering and wet pressing, TAPPI JOURNAL, June 1994, Vol. 77(6)
Journal articles
Bleaching of softwood kraft pulps with the enzone process, TAPPI JOURNAL, March 1994, Vol. 77(3)
Bleaching of softwood kraft pulps with the enzone process, TAPPI JOURNAL, March 1994, Vol. 77(3)
Journal articles
Biofiltration of a-pinene and its application to the treatment of pulp and paper air emissions, TAPPI JOURNAL, August 1998, Vol. 81(8)
Biofiltration of a-pinene and its application to the treatment of pulp and paper air emissions, TAPPI JOURNAL, August 1998, Vol. 81(8)
Journal articles
Filtration performance of face masks and facepiece respirators used during COVID-19 pandemic, TAPPI Journal February 2025
ABSTRACT: The rapid spread of SARS-CoV-2 has created challenges for societies, healthcare settings, businesses, and institutions. To curb virus transmission, various measures like lockdown, social distancing, hand hygiene, and using appropriate personal protective equipment (PPEs), including face masks, have been recommended. Face masks and facepiece respirators are considered to act as barriers against microbial transmission from person to person. In this study, we selected barrier materials used during the COVID-19 pandemic that included four non-medical face masks and three facepiece respirators. Facepiece respirators were distributed by the U.S. Administration through pharmacy outlets. Results showed that facepiece respirator R95 has the highest filtration efficiency (above 99%), which remains more or less the same over different particle sizes. The N95 respirator’s filtration efficiency was lower than that of R95, but its barrier resistance was lower than that of the R95, indicating that it can be comfortably used over longer duration. Face masks were evaluated using ASTM F 3502-24 for their barrier performance. At 0.1 and 0.3 ìm particle size, domestically manufactured masks met the standard for higher performance. Interestingly, the results indicate that quality of raw materials and manufacturing standards play important roles, as is evident in domestically manufactured face mask and facepiece respirators.