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Ventilation in Biological News

Jupiter's shrinking red spot

... WAKES CAN SPREAD GERMS IN AIRPLANES Airliner ventilation systems are designed to limit passengers' ... Plesniak says, the eddies' interaction with the ventilation system's swirling flow creates a stagnant zone ... could use to model complex, realistic cabin ventilation scenarios more rapidly and economically than is ...

Animal and biological science highlights: San Antonio Fluid Dynamics Conference, Nov. 23-25

... WAKES CAN SPREAD GERMS IN AIRPLANES Airliner ventilation systems are designed to limit passengers' ... Plesniak says, the eddies' interaction with the ventilation system's swirling flow creates a stagnant zone ... could use to model complex, realistic cabin ventilation scenarios more rapidly and economically than is ...

New gas sensors for monitoring carbon dioxide sinks

... system can also contribute to more intelligent ventilation of indoor spaces. An excessive level of carbon ... to fatigue and health problems, while excessive ventilation means a waste of energy. In classrooms, lecture ... priced measuring methods linked to appropriate ventilation technology," explains Dr Detlef Lazik from the ...

Engineer to spearhead research into cell metabolism and medical injuries

... using a mechanical ventilator or life-support machine. However, mechanical ventilation exposes patients lungs to potentially damaging positive pressures, and as ... The scale of the problem is such that 2.9% of people receiving mechanical ventilation suffer VALI each year, which represents several thousand individuals in ...

Skin oil -- ozone interactions worsen air quality in airplanes

... buildings. For instance, installing ozone-destroying catalysts in airplane ventilation systems can help remove most of the ozone from incoming air, he noted. ... wide-body planes are equipped with ozone-destroying catalysts in their ventilation systems, according to study co-author William Nazaroff, Ph.D., of the ...

American Chemical Society's Weekly Presspac -- June 17, 2009

... In the new study, Yingjun Chen and colleagues note that government officials have said for years that coal briquettes and improved stoves with better ventilation may cut emissions, but few scientific studies have tested this claim. Millions of homes in rural China and other parts of the world burn raw coal ...

Plant microbe shares features with drug-resistant pathogen

... similar mechanisms to produce glue-like substances, or biofilms, which allow them to adhere to plant roots, in one case, and medical devices such as ventilation tubes and intravenous catheters, in the other. Such devices are a common source of exposure to opportunistic pathogens for hospital patients. ...

Study: Fluid buildup in lungs is part of the damage done by the flu

... Davis noted that the current health-care system can help manage most serious cases of the flu, even if some of the sicker patients require ventilation to help them clear fluid and get oxygen to the blood. "But if we get into a pandemic situation and there are 200 people with low levels of oxygen ...

Repeat C-section before 39 weeks raises risk of neonatal illness

... 39 weeks gestation are up to two times more likely to have a baby with serious complications including respiratory distress resulting in mechanical ventilation and NICU admission. UAB researchers, led by Alan T.N. Tita, M.D., Ph.D., assistant professor in the UAB Department of Obstetrics and Gynecology ...

Oil spray reduces greenhouse gas emissions from pig finishing barns

... sample air were measured continuously with two gas analyzers. Air sampling and measurement were conducted 18 times daily to cover diel variations. ventilation fans were monitored for gas emission calculations. Barn temperature, relative humidity, animal activity, barn space heaters, manure flushing, and ...

Nanoparticles in the home: More and smaller than previously detected

... could be large even if the emissions are low. The experiments were conducted in a three-bedroom test house at NIST that is equipped to measure ventilation rates, environmental conditions and contaminant concentrations. ...

Radioactivity: Discover the lowest amounts with new methods

... Homogeneity of the environmental parameters and of the activity con-centrations of thoron and its progenies in the chamber is ensured by a special ventilation system. With this system, a compromise has been made between high circulation rates due to the low half-life of thoron, on the one hand, and low flow ...

During Olympics, Cornell's Max Zhang studies air-quality in Beijing

... the U.S. Environmental Protection Agency. Zhang also is collaborating in an air quality project in Syracuse, N.Y., helping to design a controlled ventilation system for a building to be placed at the intersection of Interstates 81 and 690 -- a major hub in downtown Syracuse. The building will house the ...

Experts prove the geochemical origin of part of the CO2 emissions in semiarid climates

... emissions which increase in dry seasons. The hypothesis formulated in this work -says Serrano- is that the emissions are a consequence of a ventilation phenomenon of the carbonated systems macro-pores, which appear to be connected with wind speed. In this line, certain studies on degasification ...

Long-term use of mechanical ventilation contributes to the deterioration of human diaphragm muscle

... in as little as eighteen hours. Muscle atrophy in the diaphragm is a major contributor of why patients who have undergone prolonged mechanical ventilation often have difficulty breathing after being removed from the ventilator. The report, published in the March 27th edition of the New England ...

Rhythmic breathing adapts to external beat through 'brain calculus'

... artificial respirators. In a study published on September 12 in the online, open-access journal PLoS ONE, Poon examined rats under mechanical ventilation to see how they applied different forms of nonassociative learning to adapt to the rhythm imposed by the respirator. Existing designs of ...

Study identifies risk factors for spread of respiratory infections in hospitals

... is a gap in the knowledge of how oxygen and ventilation therapy may promote the spread of infection. ... flow rate oxygen therapy and positive pressure ventilation in medical facilities and effective ways of ... flow oxygen therapy and positive airway pressure ventilation was used. These lessons can be applied ...

Opening windows may be the best way of preventing transmission of airborne infection

... has shown that opening windows and doors provided ventilation more than double that of mechanically ventilated ... Even at the lowest of wind speeds, natural ventilation exceeded mechanical ventilation. Facilities built ... by large windows and high ceilings, had greater ventilation than modern naturally ventilated rooms. The ...

Aircraft Cabin Ventilation Influences The Transmission Of Diseases In-flight

... Increasing ventilation within aircraft cabins can reduce the spread of ... restrict the spread of airborne pathogens. Proper ventilation within any confined space reduces the ... tuberculosis investigation reveal that doubling ventilation rate in the cabin reduced infection risk by half. ...

Children of smokers have more than 5 times higher levels of a nicotine toxin

... cotinine levels in colder times of year may be a reflection of the other key factors which influence exposure to passive smoking, such as poorer ventilation or a greater tendency for parents to smoke indoors in winter.’ Sleeping with a parent is a know risk factor for cot death and the authors ...

Spreading viruses as we breathe

... spread the virus by simply breathing. "Understanding the way viruses spread from human expiration means we can look to better design spaces, ventilation systems and filters," she said. Professor Morawska said the next stage of the research would investigate the global effect of dried droplets in ...

Rising ocean temperatures, pollution have oysters in hot water

... temperature on the mitochondria of the oyster's cells. The mitochondria are the cell's power plant, producing energy for the oyster, including for ventilation and circulation. "We found that mitochondria are very sensitive to cadmium at high temperatures," Lannig noted, suggesting that the higher ...

Highly concentrated botulinum preparation for cosmetic injections can result in severe illness

... neuropathies, regardless of exposure mechanism. Early recognition of botulism, treatment in an intensive care setting, provision of mechanical ventilation when indicated, and rapid administration of antitoxin (optimally within 12 hours of presentation) have been associated with improved clinical ....

Many cleaners, air fresheners may pose health risks when used indoors

... levels of exposure people might be subjected to when using the products in a confined space. The tests were conducted in a 230-square-foot room with ventilation at an ordinary level which provided approximately one air change every two hours. In some tests of terpene-containing products, ozone was introduced ...

Study: Paramedics save more lives when they don't follow the rules

... author of the study report. Under the new approach, first responders skipped the first steps of the standard protocol: intubating the patient for ventilation and delivering a shock using a defibrillator. While still attaching the victim to a defibrillator, they did not wait for the device to analyze the ...

How 'Dirt' Could Educate The Immune System And Help Treat Asthma

... in the atmosphere, exacerbating the problem. "At the same time, the reduced ocean circulation will decrease the ocean mixing, which decreases the ventilation to the atmosphere of carbon injected into the deep ocean," Jain said. "Our model results show that this effect is more dramatic in the Atlantic ....

Climate change will affect carbon sequestration in oceans, model shows

... in the atmosphere, exacerbating the problem. "At the same time, the reduced ocean circulation will decrease the ocean mixing, which decreases the ventilation to the atmosphere of carbon injected into the deep ocean," Jain said. "Our model results show that this effect is more dramatic in the Atlantic ....

New lab technique identifies high levels of pathogens in therapy pool

... away from very basic and important issues." Higher winter levels of airborne pathogens in such enclosed pool areas are likely due to seasonal ventilation practices, including closed doors and windows during cold periods, said Pace. Since the study, the rate of air exchange in the pool area has been ...

Why do insects stop 'breathing'? To avoid damage from too much oxygen, say researchers

... are underground. As is true for miners, insects, while underground, are faced with high-carbon-dioxide and low-oxygen amounts, necessitating a better ventilation system. While oxygen is essential for their cells to produce energy, the removal of carbon dioxide from their bodies is equally important to prevent ...
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