News tagged with carbon dioxide
Air pollutants from traffic are associated with increased asthma severity levels in pregnant asthmatic women, according to a new study.
Health 16 hours ago | not rated yet | 0
One of the major obstacles to growing new organs—replacement hearts, lungs and kidneys—is the difficulty researchers face in building blood vessels that keep the tissues alive, but new findings from the ...
Medical research Apr 04, 2013 | 5 / 5 (2) | 0 |
There may be different opinions about the causes of climate change, but experts say there is no denying its existence—and the effects are nothing to sneeze at. Researchers say global warming is leading to larger plants, ...
Immunology Mar 25, 2013 | not rated yet | 0
(Medical Xpress)—Researchers at the University of Iowa have found that three volunteer women with defective amygdalas were able to experience internal fear. In their paper published in the journal Nature Ne ...
Neuroscience Feb 04, 2013 | 5 / 5 (1) | 2 |
(Medical Xpress)—The Pain Research Group at the UA College of Medicine-Tucson studies the underlying causes of acute and chronic pain to promote the discovery of new targets for drug development with the ultimate goal of ...
Medical research Nov 27, 2012 | 5 / 5 (1) | 0 |
(Medical Xpress)—Researchers at Yale University have found that neural receptors in a fly's antenna are able to communicate with one another despite a lack of synaptic connections. They suggest in their ...
Neuroscience Nov 22, 2012 | 4.7 / 5 (3) | 2 |
Physicians at Boston Medical Center (BMC) have developed a training video for health care providers about how to effectively use capnography to monitor ventilation and carbon dioxide levels for patients under anesthesia or ...
Other Nov 08, 2012 | not rated yet | 0
Scientists from the Department for Health have shown for the first time how climate change is having a major impact on tests to measure metabolism.
Health Oct 03, 2012 | 5 / 5 (1) | 0
When mice are born lacking the master gene Atoh1, none breathe well and all die in the newborn period. Why and how this occurs could provide new answers about sudden infant death syndrome (SIDS), but the solution has remained ...
Neuroscience Sep 06, 2012 | 5 / 5 (3) | 0 |
(HealthDay) -- A fiber-guided 1,470 nm diode laser system is safe and effective for tonsillotomy in the treatment of obstructive tonsillar hypertrophy in children, according to a study published online July ...
Surgery Aug 07, 2012 | not rated yet | 0
The first time I died in my sleep, I was 26 years old. I was in bed in my St. Louis apartment when my girlfriend shook me awake to say: “You stopped breathing!”
Sleep apnea Jul 26, 2012 | 5 / 5 (2) | 0
The oxygen and food we consume are converted into energy by tiny organelles present in each cell, the mitochondria. These 'power plants' must be continuously supplied with fuel, to maintain all vital functions. A team led ...
Medical research May 24, 2012 | 5 / 5 (2) | 0
Barcelona, Spain: Patients with head and neck cancer and a low haemoglobin (Hb) level do not respond well to radiotherapy and therefore both control of their tumour and disease-free survival are compromised. Now researchers ...
Cancer May 11, 2012 | 5 / 5 (1) | 0
University of Texas at Arlington researchers have obtained a patent for a device aimed at saving babies lives through improved and rapid detection of Sudden Infant Death Syndrome.
Pediatrics May 09, 2012 | 5 / 5 (2) | 0
Health must be taken into account in climate change mitigation strategies. It is not widely appreciated that there are many benefits to health that are likely to accrue from a low carbon economy, say experts in a special ...
Health Mar 19, 2012 | not rated yet | 0
Carbon dioxide (chemical formula: CO2) is a chemical compound composed of two oxygen atoms covalently bonded to a single carbon atom. It is a gas at standard temperature and pressure and exists in Earth's atmosphere in this state.
Carbon dioxide is used by plants during photosynthesis to make sugars, which may either be consumed in respiration or used as the raw material to produce other organic compounds needed for plant growth and development. It is produced during respiration by plants, and by all animals, fungi and microorganisms that depend either directly or indirectly on plants for food. It is thus a major component of the carbon cycle. Carbon dioxide is generated as a by-product of the combustion of fossil fuels or the burning of vegetable matter, among other chemical processes. Large amounts of carbon dioxide are emitted from volcanoes and other geothermal processes such as hot springs and geysers and by the dissolution of carbonates in crustal rocks.
As of March 2009[update], carbon dioxide in the Earth's atmosphere is at a concentration of 387 ppm by volume. Atmospheric concentrations of carbon dioxide fluctuate slightly with the change of the seasons, driven primarily by seasonal plant growth in the Northern Hemisphere. Concentrations of carbon dioxide fall during the northern spring and summer as plants consume the gas, and rise during the northern autumn and winter as plants go dormant, die and decay. Carbon dioxide is a greenhouse gas as it transmits visible light but absorbs strongly in the infrared and near-infrared.
Carbon dioxide has no liquid state at pressures below 5.1 atmospheres. At 1 atmosphere (near mean sea level pressure), the gas deposits directly to a solid at temperatures below −78 °C and the solid sublimes directly to a gas above −78 °C. In its solid state, carbon dioxide is commonly called dry ice.
CO2 is an acidic oxide: an aqueous solution turns litmus from blue to pink. It is the anhydride of carbonic acid, an acid which is unstable and is known to exist only in aqueous solution.
CO2 is toxic in higher concentrations: 1% (10,000 ppm) will make some people feel drowsy. Concentrations of 7% to 10% cause dizziness, headache, visual and hearing dysfunction, and unconsciousness within a few minutes to an hour.
For more information about Carbon dioxide, read the full article at
This text uses material from Wikipedia and is available under the GNU Free Documentation License.