Nanotechnology's miniature answers to developing world's biggest problems
...er applications include systems (based on titanium dioxide and on magnetic nano-particles) that decompose organic pollutants and remove salts and heavy metals from liquids, enabling the use of heavily contaminated and salt water for irrigation and drinking. Several of the contaminating substances retrieved c...Sensor warns of gastrointestinal problems
...circulation in the stomach. A high level of carbon dioxide in the stomach is a characteristic of this so-call...lyte, covered by a gas-permeable membrane. Carbon dioxide flows from the stomach through the gas-permeable membrane into the electrolyte, where it initiates a...'Apollo Program' for hydrogen energy needed, Stanford researcher says
...t to steam, the final products areprimarily carbon dioxide and hydrogen. While the production of carbondioxid..., the process produces about 55percent less carbon dioxide than does internal combustion, Jacobson said.Other pollutants result as well, such as oxides of nitr...Giving oxygen may do more harm than good, new report shows
... although there's a simple solution adding carbon dioxide to the mix it isn't being used by most Canadian h...nd this fall constricts blood vessels. When carbon dioxide is added, however, the blood vessels dilate, increasing blood flow and causing more oxygen to reach ...Envisat monitoring China floods as part of Dragon Programme
...tiple trace gases including the pollutant nitrogen dioxide created artificially by vehicle exhausts, fossil f... since 1995, showing a steady increase in nitrogen dioxide levels in industrialised eastern China. "For trend analyses it is important to have long time serie...Breath of the dragon: ERS-2 and Envisat reveal impact of economic growth on China's air quality
...challenges. Global atmospheric mapping of nitrogen dioxide pollution performed by ERS-2's GOME and Envisat's ...CNRS) have been studying the retrieval of nitrogen dioxide variability from space and modelling its global behaviour. The team have published an article in t...Researchers link childhood asthma to exposure to traffic-related pollution
...a, and that exposure to outdoor levels of nitrogen dioxide and other traffic-related air pollutants may be a significant risk factor for this illness." Researchers looked at the pollution-asthma link in 208 children who were part of the USC-led Children's Health Study, the longest investigation ever into air...Heat dangers forgotten in the battle against air pollution
...d with sunshine, and high particulates and sulphur dioxide with low wind, both of which can increase heat str...cal School, says: "Ozone, particulates and sulphur dioxide have been fingered as the culprits when hot weather is more likely to have caused the deaths. On hot...Sandia researchers determine that common anthrax sampling methods need improvement
...eria similar to anthrax but not toxic) and silicon dioxide particles. Forty-eight coupons, each measuring 1.25 cm x 5 cm and made from stainless steel or painted wallboard, were used as the reference surfaces. After seeding, the surfaces were sampled using traditional collection methods - swabbing, wiping, a...Results of exercise test may predict death in patients with coronary artery disease
...nd breathes through a valve; the oxygen and carbon dioxide in the expired air are measured. Results are given in milliliters of oxygen per kilogram of body weight per minute (ml/kg/min). "The best predictor of survival in cardiac patients is their capacity for exercise," says Thomas Allison, Ph.D., the lead ...ESA participating in UN's Montreal summit working for a better atmosphere
...evels of greenhouse gases chief among them carbon dioxide believed to be increasing global warming. Around 25 billion tonnes of extra carbon dioxide is released into the atmosphere annually by human activities, mainly through wildfires, land clearan...As Montreal Conference considers deforestation issues, ESA presents space solution
...ic ice shows prove that the current rate of carbon dioxide increase is unprecedented for the last 650 000 years. The Kyoto Protocol to the United Nations Framework Convention on Climate Change (UNFCCC), which was agreed in 1997 and entered into force in February this year, was an initial effort to moderate ...Take a deep breath: UVA health system opens clinical trial of emphysema treatment
... where oxygen from the air is exchanged for carbon dioxide in the blood. As these air sacs are destroyed, the lungs are able to transfer less and less oxygen to the bloodstream, causing shortness of breath. The lungs also lose their elasticity, which is important to keep airways open. Emphysema doesn't devel...Asthmatic children in multi-family housing hit by indoor nitrogen dioxide
...ness of breath and chest tightness. The nitrogen dioxide levels inside the homes investigated in the study ...hma, younger than 12, who were exposed to nitrogen dioxide in their home. According to the authors, the 2000 U.S. Census indicated that more than half of U.S......y last alveola. Here oxygen is released and carbon dioxide taken up in the same way as on the respiration surface. Then the respirator extracts part of the perfluorocarbon from the lungs and introduces the next oxygenated dose. The same machine carries out the removal of CO2 from the perfluorocarbon and adds...Patients with severe sleep-disordered breathing have high odds of abnormal heart rhythms
... amount of oxygen and increase the level of carbon dioxide in the blood and brain. In this study, participants with SDB had a respiratory disturbance index that averaged about 44 pauses per hour of sleep. The control subjects experienced only 2.8 interruptions per hour. "Individuals with sleep-disordered b...CT colonography even safer than previously reported, says study
...hen distending the colon using an automated carbon dioxide technique, a finding that goes against the higher ...sufflation in 60% of cases and by automated carbon dioxide delivery in 40%. No perforations were recorded in patients undergoing screening CTC or with those wh...SCAI Founders' Lecture traces impressive progress in interventional cardiology
...fed by the arterial wall and dissolves into carbon dioxide and water, returning the artery to its natural state. "A conventional metal stent is like having a broken arm and never getting the cast removed," Dr. Stack said. "Once the artery heals, you don't need the stent." The Founders' Lecture is an annual ...How to cut energy waste in China, India, Brazil said crucial to forestalling climate change
...on us. The current 380 parts per million of carbon dioxide in the atmosphere seem already too high. Roughly half of the global consumption of fossil fuels should be avoided if climate is to be stabilized. Using energy much more wisely is one of the very few feasible ways that, combined, would move the world ......esigned to stabilise and then reduce global carbon dioxide emissions, writes Dr Robin Stott. The first step in implementing this policy is to set a global carbon budget. This initial budget is then reduced (contracted) at an agreed pace and time until the amount of allocated carbon equals the globe's carryin...