Assessment of the Efficiency of Respiratory Protection Devices Against Lead Oxide Nanoparticles

2018 ◽  
pp. 257-272 ◽  
Author(s):  
Eva Kellnerová ◽  
Kristýna Binková ◽  
Šárka Hošková-Mayerová
Keyword(s):  
Lead Oxide ◽  
Oxide Nanoparticles ◽  
Respiratory Protection ◽  
Protection Devices

scholarly journals Use of Respiratory Protection Devices by Medical Students During the COVID-19 Pandemic

2021 ◽  
Vol 18 (11) ◽  
pp. 5834
Author(s):  
Ekaterina A. Shashina ◽  
Valentina V. Makarova ◽  
Denis V. Shcherbakov ◽  
Tatiana S. Isiutina-Fedotkova ◽  
Nadezhda N. Zabroda ◽  
...  
Keyword(s):  
Medical Students ◽  
Face Mask ◽  
Protective Measure ◽  
Protective Equipment ◽  
Respiratory Protection ◽  
Prevention Measures ◽  
Protection Devices ◽  
Individual Use

The use of face masks has assumed a leading spot among nonspecific prevention measures during the coronavirus pandemic. The effectiveness of this protective measure depends on the specifics of individual use. The purpose of our study was to analyze the use of respiratory protective equipment (RPE) by medical students during the COVID-19 pandemic. The evaluation of face mask use was based on the results of a survey of medical students at Sechenov University. There were 988 participants in the study: 97.5% used RPE during the pandemic, 89.1% used disposable medical and hygienic face masks, 27.4% used reusable cloth face masks, and 13.2% used respirators. The majority of respondents (75.2%) were found to wear face masks correctly. However, 17.0% of the respondents were found to cover only their mouths with a face mask, while 7.8% reported often shifting their face mask under the chin due to perceived discomfort. Only 25.1% of respondents changed their disposable face mask after 2-3 h of wearing, while 13.0% decontaminated and used it several times. Most cloth face mask users (93.7%) decontaminated their marks, but only 55.7% of respondents did so daily. Face masks were most often worn in medical organizations (91.5%), and 1.4% of respondents did not use respiratory protection anywhere. In conclusion, we consider it necessary to introduce a special module on nonspecific prevention in the discipline of hygiene.

scholarly journals Testing the protective efficiency of personal respiratory protection devices in radiologically contaminated environments

2013 ◽  
Vol 28 (1) ◽  
pp. 102-107
Author(s):  
Dusan Rajic ◽  
Negovan Ivankovic ◽  
Natasa Ivankovic ◽  
Marina Ilic ◽  
Zeljko Senic ◽  
...  
Keyword(s):  
High Efficiency ◽  
Face Mask ◽  
Depleted Uranium ◽  
Test Substance ◽  
Respiratory Protection ◽  
Protective Efficiency ◽  
Submicron Scale ◽  
Protection Devices ◽  
Protective Mask

The use of ammunition primed with depleted uranium is one of the hallmarks of modern combat operations, resulting in environmental contamination by particles of depleted uranium and uranium oxide, scattered around in the form of submicron-scale aerosols. This paper examined the protective effectiveness of the Serbian military's M3 protective face mask in relation to the presence of airborne depleted uranium and its by-products. Sodium chloride in solid aerosol form was used as a test substance and adequate physical simulator of such radioactive aerosols because its granulometric (particle) size distribution met the requirements of suitability as a simulator. Determination of aerosol concentration was carried out by flame photometry method, whilst granulometric distribution was determined by an electric particles analyzer. It was established that the total internal leakage of the M3 protective mask was as much a function of the penetration of particles through the combined M3 filter as of the leaks along the fitting line of the user's face mask and the inhalation valve. In terms of its protective effect against aerosols of depleted uranium and associated oxides, the Serbian M3 protective mask was determined to be of high efficiency and physiological suitability.

scholarly journals Preparation and Characterization of Lead Oxide Nanoparticles by Laser Ablation as Antibacterial Agent

2017 ◽  
Vol 14 (4) ◽  
pp. 801-807
Author(s):  
Baghdad Science Journal
Keyword(s):  
Laser Ablation ◽  
Lead Oxide ◽  
Laser Energy ◽  
Laser Pulses ◽  
Diffusion Method ◽  
Lead Target ◽  
Oxide Nanoparticles ◽  
Gram Positive ◽  
Gram Negative ◽  
Gram Positive Bacteria

In this work, lead oxide nanoparticles were prepared by laser ablation of lead target immersed in deionized water by using pulsed Nd:YAG laser with laser energy 400 mJ/pulse and different laser pulses. The chemical bonding of lead oxide nps was investigated by Fourier Transform Infrared (FTIR); surface morphology and optical properties were investigated by Scanning Electron Microscope (SEM) and UV-Visible spectroscopy respectively, and the size effect of lead oxide nanoparticles was studied on its antibacterial action against two types of bacteria Gram-negitive (Escherichia coli) and Gram-positive (Staphylococcusaurus) by diffusion method. The antibacterial property results show that the antibacterial activity of the Lead oxide NPs was inversely proportional to the size of the nanoparticles in both Gram-negative and Gram-positive, and also it has been found that Gram-positive bacteria possess have greater sensitivity and less resistance to the lead oxide nanoparticles compared with Gram-negative bacteria.

scholarly journals Injuries related to respiratory masks in the US are very rare

2021 ◽  
Author(s):  
Philip N. Cohen
Keyword(s):  
Census Data ◽  
Incidence Rates ◽  
Common Type ◽  
Respiratory Protection ◽  
Risk Of Falling ◽  
Injury Surveillance System ◽  
Household Products ◽  
The Us ◽  
Protection Devices ◽  
Almost All

Background. Protective facemasks are important for preventing the spread of COVID-19, and almost all Americans have worn them at least some of the time during the pandemic. There are reasonable concerns about some ill effects of mask-wearing, especially for people who wear masks for extended periods, and for the risk of falling as a result of visual obstruction. But there are also unsupported fears and objections stemming from misinformation and fueled by political disputes. Methods. The study analyzed the Consumer Product Safety Commission’s National Electronic Injury Surveillance System (NEISS) for 2020, using the product code for Respiratory Protection Devices, and calculated population incidence rates using Census data. Results. The NEISS included 128 cases, representing an estimated 5122 reported injuries in the population (95% CI 3322, 6922). The overall rate of injury reports was 1.54 per 100,000 U.S. residents (95% CI 1.00, 2.08). People over age 75 had higher rates than the population overall, with 5.27 injuries per 100,000 (95% CI 2.17, 8.37). The most common type of incidents involved facial injuries, rashes, falls, and those that might be considered anxiety-related. Conclusion. Wearing protective face masks is extremely safe, especially in comparison with other common household products, and in light of their protective benefits with regard to prevent the spread of COVID-19. This information may be useful for public health messaging, and for practitioners trying to increase compliance with mask-wearing guidance.

In vivo toxicity of copper oxide, lead oxide and zinc oxide nanoparticles acting in different combinations and its attenuation with a complex of innocuous bio-protectors

Toxicology ◽  
2017 ◽  
Vol 380 ◽  
pp. 72-93 ◽  
Author(s):  
Ilzira A. Minigalieva ◽  
Boris A. Katsnelson ◽  
Vladimir G. Panov ◽  
Larisa I. Privalova ◽  
Anatoly N. Varaksin ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Copper Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Lead Oxide ◽  
Oxide Nanoparticles ◽  
In Vivo Toxicity

scholarly journals Synthesis of (Poly-methyl Methacrylate-lead Oxide) Nanocomposites and Studying their A.C Electrical Properties for Piezoelectric Applications

2018 ◽  
Vol 7 (4) ◽  
pp. 547-551
Author(s):  
Dalal Hassan ◽  
Ahmed Hashim
Keyword(s):  
Electrical Conductivity ◽  
Dielectric Constant ◽  
Dielectric Loss ◽  
Methyl Methacrylate ◽  
Electrical Resistance ◽  
Lead Oxide ◽  
Piezoelectric Materials ◽  
Oxide Nanoparticles ◽  
Poly Methyl Methacrylate ◽  
Increase With Increase

Piezoelectric materials have been prepared from (poly-methyl methacrylate-lead oxide) nanocomposites for electronic applications. The lead oxide nanoparticles were added to poly-methyl methacrylate by different concentrations are (4, 8, and 12) wt%. The structural and dielectric properties of nanocomposites were studied. The results showed that the dielectric constant and dielectric loss of nanocomposites decrease with increase in frequency of applied electric field. The A.C electrical conductivity increases with increase in frequency. The dielectric constant, dielectric loss and A.C electrical conductivity of poly-methyl methacrylate increase with increase in lead oxide nanoparticles concentrations. The results of pressure sensor showed that the electrical resistance of (PMMA-PbO2) nanocomposites decreases with increase in pressure.

PROBLEM OF PHYSIOLOGICAL ESTIMATION OF NEGATIVE IMPACT OF FILTERING RESPIRATORY PROTECTION DEVICES TO WORKERS

2021 ◽  
Author(s):  
V.I. Lemeshko ◽  
◽  
I.V. Ivanov ◽  
A.M. Geregey ◽  
Keyword(s):  
Human Body ◽  
Negative Impact ◽  
Protective Equipment ◽  
Respiratory Protection ◽  
Physiological Processes ◽  
Foreign Countries ◽  
Modern Methods ◽  
Physiological Assessment ◽  
Protection Devices ◽  
The Impact

Abstract: Filtering respiratory protection devices are widely used in industry and now in healthcare. The tests that these products undergo assess only the technical characteristics, without considering how the personal protective equipment affects the physiological processes of the user. The purpose of this study was to study modern methods of physiological assessment of the negative impact of the use of filtering respiratory protection devices on the human body. Analyzed domestic and foreign publications. The absence of a unified set of physiological methods for assessing the impact of filtering means of personal respiratory protection on the employee's body was established. This may be due to insufficient actualization of this problem both in Russia and in foreign countries.

Social Marketing Campaign Promoting the Use of Respiratory Protection Devices Among Farmers

2014 ◽  
Vol 19 (3) ◽  
pp. 316-324 ◽  
Author(s):  
Lea Pounds ◽  
Ellen Duysen ◽  
Debra Romberger ◽  
Mary E. Cramer ◽  
Mary Wendl ◽  
...  
Keyword(s):  
Social Marketing ◽  
Respiratory Protection ◽  
Marketing Campaign ◽  
Social Marketing Campaign ◽  
Protection Devices
Sign in / Sign up

Export Citation Format

Share Document