PRESS-NEWS.org - Press Release Distribution
FREE PRESS RELEASES DISTRIBUTION

New study proposes a low cost, high efficiency mask design

2021-03-02
(Press-News.org) A new paper in Oxford Open Materials Science, published by Oxford University Press, presents low cost modifications to existing N95 masks that prolongs their effectiveness and improves their reusability post disinfectants.

The COVID-19 crisis has increased demand for respiratory masks, with various models of DIY masks becoming popular alongside the commercially available N95. The utility of such masks is primarily based on the size of aerosols that they are capable of filtering out and how long they can do so effectively.

Conventional masks like the N95 use a layered system and have an efficiency rate of 95%. Yet, this rate begins to drop after someone wears them for more than eight hours. This is due to the fact that N95 masks were designed for single use. The high demand caused by COVID-19 has led people to disinfect them for reuse. As such, a team of scientists have put together various techniques for decontamination and reuse of respiratory masks based on experimental data and guidelines issued by Center for Disease Control.

Researchers here propose a low cost ($1), tri-layer mask design containing nylon, modified polypropylene, and non-woven cotton fabrics. While the polypropylene layer is available in N95 masks, this design includes a graphene oxide and polyvinylidene fluoride mixture which acts as an active filtration layer. Recent studies show that the graphene oxide mixture has a high anti-bacterial activity making it ideal for respiratory masks. This coating has also proven to be effective even after being disinfected with H2O2, a popular practice when reusing masks. The addition of these membranes results in an efficiency level of 95%, like that of an N95, while also simplifying the number of layers in the design for increased comfort.

"The possibility to produce cost effective reusable N95 masks that can help the public health system and common citizens motivated the work. We tried to leverage the connection between electrostatic charge and the filtration efficiency of masks for submicron size particles and viruses to come up with a design to make N95 masks reusable" said By Dr. Rajalakshmi.

These cheap and simple modifications can provide people in all socioeconomic classes with a long-lasting, high-filtration respiratory mask.

INFORMATION:

Direct correspondence to: Tharangattu N. Narayanan
Tata Institute of Fundamental Research
Gopanapally Village, Hyderabad
INDIA
tnn@tifrh.res.in

To request a copy of the study, please contact: Timothy Thomas
Timothy.Thomas@oup.com



ELSE PRESS RELEASES FROM THIS DATE:

A materials science approach to combating coronavirus

A materials science approach to combating coronavirus
2021-03-02
Researchers at Tokyo Institute of Technology working in collaboration with colleagues at the Kanagawa Institute of Industrial Science and Technology and Nara Medical University in Japan have succeeded in preparing a material called cerium molybdate (γ-Ce2Mo3O13 or CMO), which exhibits high antiviral activity against coronavirus. The ongoing coronavirus pandemic has highlighted the urgency not only of vaccine development and rollout but also of developing innovative materials and technologies with antiviral properties that could play a vital role in helping to contain the spread of the virus. Conventional inorganic antimicrobial materials are often prepared with metals such as copper or photocatalysts ...

High fat diets may over-activate destructive heart disease protein

2021-03-02
Peer Reviewed Experimental Animals Consumption of a high fat diet may be activating a response in the heart that is causing destructive growth and lead to greater risk of heart attacks, according to new research. In a paper published in Biochemical and Biophysical Research Communications, researchers looked at the effect of feeding mice a high fat diet on oxidative stress levels on heart cells. The team from the University of Reading found that cells from the mice had twice the amount of oxidative stress, and led to heart cells being up to 1.8 times bigger due to cardiac hypertrophy which is associated with heart disease. Named first author Dr Sunbal Naureen ...

Tissue, scaffold technologies provide new options for breast cancer, other diseases

Tissue, scaffold technologies provide new options for breast cancer, other diseases
2021-03-02
WEST LAFAYETTE, Ind. - New technology from Purdue University innovators may help improve tissue restoration outcomes for people with breast cancer and other diseases or traumatic injuries. Purdue researchers, along with fellowship-trained breast surgeon Carla Fisher of Indiana University School of Medicine, teamed up with Purdue startup GeniPhys to develop and perform preclinical studies on a regenerative tissue filler. This is a first-of-a-kind, in situ scaffold-forming collagen. When applied as a filler for soft tissue defects and voids, it shows promise for accelerating and improving tissue restoration outcomes. The team's work is published in Scientific Reports. "It ...

Neanderthal and early modern human stone tool culture co-existed for over 100,000 years

2021-03-02
The Acheulean was estimated to have died out around 200,000 years ago but the new findings suggest it may have persisted for much longer, creating over 100,000 years of overlap with more advanced technologies produced by Neanderthals and early modern humans. The research team, led by Dr Alastair Key (Kent) alongside Dr David Roberts (Kent) and Dr Ivan Jaric (Biology Centre of the Czech Academy of Sciences), made the discovery whilst studying stone tool records from different regions across the world. Using statistical techniques new to archaeological science, the archaeologists and conservation experts were able to reconstruct the end of the Acheulean period and re-map the archaeological record. Previously, a more rapid shift between the earlier Acheulean stone ...

The time is ripe! An innovative contactless method for the timely harvest of soft fruits

The time is ripe! An innovative contactless method for the timely harvest of soft fruits
2021-03-02
Most people are probably familiar with the unpleasant feeling of eating overripe or underripe fruit. Those who work in agriculture are tasked with ensuring a timely harvest so that ripeness is at an optimal point when the fruit is sold, both to minimize the amount of fruit that goes to waste and maximize the quality of the final product. To this end, a number of techniques to assess fruit ripeness have been developed, each with their respective advantages and disadvantages depending on the type of produce. Although biochemical and optical methods exist, mechanical techniques are the most widely used. They indirectly assess ripeness based on the fruit's firmness. In turn, firmness ...

Rarest seal breeding site discovered

Rarest seal breeding site discovered
2021-03-02
Scientists have discovered a previously unknown breeding site used by the world's rarest seal species. The Mediterranean monk seal is classified as "endangered", with a total population of about 700. The new study - by the University of Exeter and the Society for the Protection of Turtles (SPOT) - used camera-traps to confirm breeding in caves in northern Cyprus, with at least three pups born from 2016-19 at one cave. Only certain caves are suitable for monk seal breeding and resting, so - although the numbers are small - the researchers say urgent action is needed to protect these caves. "This area of coastline in being developed rapidly, especially for ...

WHO expert panel strongly advises against use of hydroxychloroquine to prevent covid-19

2021-03-02
The anti-inflammatory drug hydroxychloroquine should not be used to prevent infection in people who do not have covid-19, say a WHO Guideline Development Group (GDG) panel of international experts in The BMJ today. Their strong recommendation is based on high certainty evidence from six randomised controlled trials involving over 6,000 participants with and without known exposure to a person with covid-19 infection. High certainty evidence showed that hydroxychloroquine had no meaningful effect on death and admission to hospital, while moderate certainty evidence showed that hydroxychloroquine had no meaningful effect on laboratory confirmed covid-19 infection and it probably increases the risk of adverse effects. As such, ...

Alcohol and tobacco sales climb during early months of COVID-19 pandemic

Alcohol and tobacco sales climb during early months of COVID-19 pandemic
2021-03-02
LOS ANGELES -- COVID-19 has taken a huge medical, emotional and economic toll on Americans. Now, new Keck Medicine of USC research shows that the pandemic may also have harmful indirect consequences. Alcohol and tobacco sales nationwide rose in the early months of COVID-19, according to a study appearing in the Annals of Internal Medicine today. From April - June 2020, researchers found that sales of these substances increased 34% and 13% respectively when compared to the same months in 2019. "These are significant jumps, and show that the stress, boredom and loneliness caused by the pandemic may have led to increased alcohol and tobacco ...

Researchers find frustration is an additional factor of addiction

2021-03-02
GALVESTON, Texas -A team from The University of Texas Medical Branch at Galveston (UTMB) focused on drug addiction research have pioneered a new way to study frustration as a factor in substance use disorders. The study was published in the medical journal Psychopharmacology. Traditional addiction research has focused on three aspects of substance use disorders: craving, impulsivity, or habit. Scientists hypothesized that a fourth factor, frustration, could also lead to escalation of drug use and addiction. The Psychopharmacology paper noted that research into the role of frustration and substance use disorders ...

Why some rural enrollees in Medicare Advantage are switching to traditional Medicare

2021-03-01
Philadelphia, Pa. -- More than one out of every 10 seniors (10.5%) enrolled in a Medicare Advantage plan, also known as a Medicare managed care option, and living in a rural area, switched to traditional Medicare during 2010-2016. The switch was driven primarily due to low satisfaction with care access, according to a study published this week in Health Affairs from researchers at Drexel University's Dornsife School of Public Health. By contrast, only 1.7% of rural traditional Medicare enrollees made the switch to Medicare Advantage during this period. The findings, among the first to look ...

LAST 30 PRESS RELEASES:

E-cigarettes with a cigarette-like level of nicotine are effective in reducing smoking

Deep Learning model developed at UHN to maximize lifespan after liver transplant 

Convenience over reputation: Study looks at how older adults pick a doctor

Ocean bacteria release carbon into the atmosphere

Spotting cows from space

Scientists watch 2D puddles of electrons emerge in a 3D superconducting material

Research suggests SEC's increasing focus on terrorism may limit financial oversight

Plastic planet: Tracking pervasive microplastics across the globe

Gut epithelium muscles up against infection

Scientists discover three liquid phases in aerosol particles

New mechanism identified behind blindness in older adults

Common approach to diversity in higher education reflects preferences of white Americans

Study reveals cancer immunotherapy patients at most risk of life-threatening side effects

Study reveals crucial details on skin-related side effects of cancer immune therapies

Researchers identify surface protein as a new osteosarcoma therapeutic target for antibody-drug conjugates

Differences in B cell responses to coronaviruses and other pathogens in children and adults

Bottom-up is the way forward for nitrogen reduction at institutions

Road salts and other human sources are threatening world's freshwater supplies

Researchers engineer probiotic yeast to produce beta-carotene

Spanking may affect the brain development of a child

UConn researchers find bubbles speed up energy transfer

Antidepressant use in pregnancy tied to affective disorders in offspring; no causal link

Binge-eating is not caused by stress-induced impulsivity

Stress does not lead to loss of self-control in eating disorders

USC Stem Cell study reveals neural stem cells age rapidly

Following atoms in real time could lead to better materials design

People want to improve mental health by exercising, but stress and anxiety get in the way

More than the sum of mutations

Living foams

Research brief: How pharmacists contribute meaningfully in primary health care

[Press-News.org] New study proposes a low cost, high efficiency mask design