gas

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Related to Gaseous phase: gases

gas

 [gas]
any elastic aeriform fluid in which the molecules are widely separated from each other and so have free paths.
alveolar gas the gas in the alveoli of the lungs, where gas exchange with the capillary blood takes place.
blood g's the partial pressures of oxygen and carbon dioxide in blood; see blood gas analysis.
laughing gas nitrous oxide.
gas pains pains caused by distention of the stomach or intestines by accumulation of air or other gases. The presence of gas is indicated by distention of the abdomen, belching, or discharge of gas through the rectum. Gas-forming foods include highly flavored vegetables such as onions, cabbage, and turnips; members of the bean family; and fruits such as melons and raw apples. Some seasonings and other chemical irritants also produce gas.
tear gas any of various irritant vapors dispensed by aerosol and causing pain and severe lacrimation in humans; some also cause irritation of exposed mucous membranes as well as vomiting. Common ones include chloroacetophenone (CN), o-chlorobenzylidenemalononitrile (see CS), and dibenz(b,f)-1,4-oxazepine (see cr); the most common of the three is CS (also known as mace).

GAS

Abbreviation for group A streptococci , under streptococcus.

gas

(gas),
1. A thin fluid, such as air, capable of indefinite expansion but convertible by compression and cold into a liquid and, eventually, a solid.
2. In clinical practice, a liquid entirely in its vapor phase at one atmosphere of pressure because ambient temperature is above its boiling point.
[coined by J.B. van Helmont, Flemish chemist and physician, 1579-1644]

gas

(găs)
n. pl. gases or gasses
1.
a. The state of matter distinguished from the solid and liquid states by relatively low density and viscosity, relatively great expansion and contraction with changes in pressure and temperature, the ability to diffuse readily, and the spontaneous tendency to become distributed uniformly throughout any container.
b. A substance in the gaseous state.
2. A gaseous asphyxiant, irritant, or poison.
3. A gaseous anesthetic, such as nitrous oxide.
4.
a. Flatulence.
b. Flatus.
v. gassed, gassing, gases or gasses
v.tr.
1. To treat chemically with gas.
2. To overcome, disable, or kill with poisonous fumes.

GALNS

A gene on chromosome 16q24.3 that encodes N-acetylgalactosamine-6-sulfatase, a lysosomal exohydrolase required for the degradation of glycosaminoglycans, keratan sulfate and chondroitin 6-sulfate.

Molecular pathology
Defects of GALNS cause Morquio A syndrome, a lysosomal storage disease.

gas

A volatilized liquid. See Biogas, Compressed gas, Flammable gas, Greenhouse gas, Mustard, Natural gas, Oxidant gas, Phosgene gas Occupational medicine A gas phase contaminant. See Inhalant.

gas

(gas)
1. Fluid, like air, capable of indefinite expansion but convertible by compression and cold into a liquid and, eventually, a solid.
2. In clinical practice, a substance entirely in its vapor phase at 1 atmosphere of pressure because ambient temperature is above its boiling point.
[coined by J.B. van Helmont, Flemish chemist and physician, 1579-1644]

gas

(gas)
1. A thin fluid, such as air, capable of indefinite expansion but convertible by compression and cold into a liquid and, eventually, a solid.
2. In clinical practice, a liquid entirely in its vapor phase at one atmosphere of pressure because ambient temperature is above its boiling point.
[coined by J.B. van Helmont, Flemish chemist and physician, 1579-1644]

Patient discussion about gas

Q. why do i have gas and bloating my bowels are weird and my stomach is sour also. i have pain in the top of my stomach

A. There are many different things that can cause them. Do you also suffer from diarrhea? Do you have diabetes? Do you have pain that is relieved by eating or after going to the bathroom?

Among the more common causes there are IBS (http://en.wikipedia.org/wiki/Irritable_bowel_syndrome), diabetes, malabsorption (e.g. lactose intolerance http://en.wikipedia.org/wiki/Lactose_intolerance or celiac http://en.wikipedia.org/wiki/Coeliac_disease), all of these, unfortunately, can't be diagnosed over the net, so if it keeps bothering you or if you have warning sign (such as Nocturnal abdominal pain (sleep awakening), Weight loss, Blood in the stool , Severely tender abdomen , Succussion splash , Fever , Vomiting , fatty diarrhea , New onset diarrhea) you should see a doctor.

Q. I often have gases in my stomach. And it hurts. Is there specific food I should avoid? thanks

A. Why don't you try to run a log of what you eat and how did you feel after that? The digestive system of each of us is different, so it may not be possible to give you advice that would be good for you specifically. If these complaints bothers you, you may also want to consult a docotr.

www.nlm.nih.gov/medlineplus/ency/article/003124.htm

More discussions about gas
References in periodicals archive ?
The energy conservation equation for the solid and gaseous phases is given by
The filtration rate of the gaseous phase through the section of the compacting zone thickness [H.sub.0] and width B can be determined by the formula:
MA was oxidized to a concentration of less than 0.1mM in the aqueous phase and to no more than 0.4 ppm at the outlet of the gaseous phase (Figures 6(a) and 6(b), resp.).
These reactions inhibit flaming combustion in the gaseous phase.
It should be considered as a serious ignorance by editors of this volume that they did not pay attention to this rapidly growing area of separating enantiomers in gaseous phase.
The intensities of characteristic peaks for these compounds decreased, depending on the oil shale sample used and the gaseous compound evolved, 2-5 times (Figures 12-14), which means that a great part of S[O.sub.2] and HCl formed during thermooxidation of fuels could be immediately bound into the solid phase by lime-containing material added, and the formation and emission of COS and chlorobenzene into the gaseous phase could be at that limited as well.
The initial pressure, temperature and rate of expansion determined the conditions at the ignition time (and during combustion), such as pressure, temperature, liquid and gaseous phase equivalence ratio, droplet diameter distribution and number density as discussed in Atzler et al.
It is considered that it is impossible in presence of a molten slag, which participates in many metallurgical processes, to alloy metal by nitrogen directly from gaseous phase. That's why alloying of a metal by nitrogen should be performed by introduction into molten metal of nitrated ferroalloys [1, 2] or nitrides of alloying elements [3].
The expansion ability of a thermoplastic polymer relies upon the released volume of a blowing agent and the expansion ability of a gaseous phase dispersed throughout the polymer melt.
EA instruments convert liquid and solid samples into a gaseous phase in order for the IRMS to perform its function.
"For that reason there is merit in looking at alternatives." However, "there are as many difficulties with the [Carnegie group's] alternative story." For one thing, there's still some doubt whether gravitational instabilities can grow at all in the mostly gaseous phase of the early solar nebula.
In some cases, these intermediate compounds can be more hazardous than the compound being decomposed." For example, he says, the breakdown of TCE yields trichloroacetic acid (a substance almost as toxic as TCE) and, in the gaseous phase, phosgene (a chemical warfare agent).