ArticlePeerJ2019
Optical microscopic study of surface morphology and filtering efficiency of face masks.
Article in PeerJ, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 32 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
32 citing papers in PubMed, 92 citations in OpenAlex.
- Post-Pandemic: Investigation of the Degradation of Various Commercial Masks in the Marine Environment.Langmuir : the ACS journal of surfaces and colloids · 2023Article
- Functional Fiber Membranes with Antibacterial Properties for Face Masks.Advanced fiber materials · 2023Article
- Carbon footprint assessment of face masks in the context of the COVID-19 pandemic: Based on different protective performance and applicable scenarios.Journal of cleaner production · 2023Article
- Article
- Effectiveness of Inexpensive Cloth Facemasks and Their Amendments to Reduce Ambient Particulate Exposures: A Case of Kathmandu, Nepal.Journal of environmental and public health · 2023Article
- Surface Functionalization of Face Masks with Cold Plasma and Its Effect in Anchoring Polyphenols Extracted from Agri-Food.Molecules (Basel, Switzerland) · 2022Article
- Impact of washing parameters on bacterial filtration efficiency and breathability of community and medical facemasks.Scientific reports · 2022Article
- Recent advances in facemask devices forTrends in analytical chemistry : TRAC · 2022Review
- Advances in the Prophylaxis of Respiratory Infections by the Nasal and the Oromucosal Route: Relevance to the Fight with the SARS-CoV-2 Pandemic.Pharmaceutics · 2022Review
- Article
- Masks for COVID-19.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2022Review
- Airborne virus transmission via respiratory droplets: Effects of droplet evaporation and sedimentation.Current opinion in colloid & interface science · 2021Review
- Which strategy for using medical and community masks? A prospective analysis of their environmental impact.BMJ open · 2021Article
- Disposable face masks and reusable face coverings as non-pharmaceutical interventions (NPIs) to prevent transmission of SARS-CoV-2 variants that cause coronavirus disease (COVID-19): Role of new sustainable NPI design innovations and predictive mathematical modelling.The Science of the total environment · 2021Review
- COVID-19: Performance study of microplastic inhalation risk posed by wearing masks.Journal of hazardous materials · 2021Article
- Face masks against COVID-19: Standards, efficacy, testing and decontamination methods.Advances in colloid and interface science · 2021Review
- COVID-19 pandemic management and the rheumatology patient.Best practice & research. Clinical rheumatology · 2021Review
- Facemasks Readily Available in Common Stores used by Nepalese, How much Protection is Enough Protection against COVID-19?JNMA; journal of the Nepal Medical Association · 2021Article
- Technological Scenario for Masks in Patent Database During Covid-19 Pandemic.AAPS PharmSciTech · 2021Review
- The critical importance of mask seals on respirator performance: An analytical and simulation approach.PloS one · 2021Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
4 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundLow-cost face masks made from different cloth materials are very common in developing countries. The cloth masks (CM) are usually double layered with stretchable ear loops. It is common practice to use such masks for months after multiple washing and drying cycles. If a CM is used for long time, the ear loops become stretched. The loop needs to be knotted to make the mask loop fit better on the face. It is not clear how washing and drying and stretching practices change the quality of a CM. The particulate matter (PM) filtering efficiency of a mask depends on multiple parameters, such as pore size, shape, clearance, and pore number density. It is important to understand the effect of these parameters on the filtering efficiency.
methodsWe characterized the surface of twenty different types of CMs using optical image analysis method. The filtering efficiency of selected cloth face masks was measured using the particle counting method. We also studied the effects of washing and drying and stretching on the quality of a mask.
resultsThe pore size of masks ranged from 80 to 500 μm, which was much bigger than particular matter having diameter of 2.5 μm or less (PM
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.