Where results make sense
About us   |   Why use us?   |   Reviews   |   PR   |   Contact us  

Topic: Vapor

Related Topics

  ARL Frequently Asked Questions
It is, therefore, the ratio of the mass of water vapor in a sample to the total mass of the sample moist air, including both the dry air and the water vapor.
Absolute humidity is the water vapor density, defined as the ratio of the mass of water vapor to the volume of associated moist air and generally expressed in grams per cubic meter.
Transpiration of water vapor through leaf stomata depends on the gradient of moisture between the leaf interior (which is saturated) and the overlying air, as well as the availability of moisture in the soil.
www.arl.noaa.gov /faq/c1.html   (1761 words)

 Best practices: Vapor retarders and air infiltration barriers - Oldhouseweb.com
Effective vapor retarders must have a water vapor permeability not exceeding 1.0 grains per hour per square foot per inch of mercury vapor pressure difference (referred to as 1.0 perms), and must be installed in such a manner as to prevent air leaks at joints and laps.
The primary purpose for installing a vapor retarder in residential rehabilitation is to minimize moisture vapor migration into a wall or roof assemly where it has the potential to deposit condensate when the dew point is reached.
Vapor retarder primers are the simplest application in situations where existing wallboard or plaster surfaces are not to be significantly disturbed.
www.oldhouseweb.com /stories/Detailed/10362.shtml   (2958 words)

 Vapor Drive   (Site not responding. Last check: )
If the air on the outside is fully populated with molecules of water vapor and the air on the inside is sparsely populated, it is easy to understand the water vapor wants to even itself out between the two air volumes.
The water vapor molecules on the outside are going to try their hardest to get to the inside and even things up.
Water vapor molecules in the house will migrate up to and through the ceilings into the insulation, up through the insulation, into the attic and hopefully the air moving through the attic will carry them off.
www.monolithic.com /plan_design/vapor_drive/index.html   (1074 words)

 Vapor barrier - Wikipedia, the free encyclopedia
Outside of the tropics, vapor barriers are usually installed on the interior side of a wall where the interior is warmer than the exterior.
The vapor barrier is placed in between the insulation and the conditioned space, usually stapled to the studs.
Some people think that vapor barriers are inherently flawed solutions for preventing moisture from entering wall cavities, because you poke them with hundreds of holes when you staple them to the framing studs, and you poke them with hundreds more holes when you install the drywall.
en.wikipedia.org /wiki/Vapor_barrier   (2266 words)

 Vapor Pressure: Molecular Size
The measurement of pressure exerted by a vapor is demonstrated using barometers.
Vapor pressure varies with the strength of the intermolecular forces in the liquid.
Methanol has the higher vapor pressure because its molecules are smaller than those of ethanol, and so its intermolecular forces are less than ethanol's.
jchemed.chem.wisc.edu /JCESoft/CCA/CCA2/MAIN/VAPORES5/CD2R1.HTM   (464 words)

 VAPOR - Visualization and Analysis Platform for Ocean, atmosphere, and solar Researchers
VAPOR is the Visualization and Analysis Platform for Ocean, Atmosphere, and Solar Researchers..
VAPOR runs on most UNIX and Windows systems equipped with modern 3D graphics cards.
The VAPOR development is led by the National Center for Atmospheric Research's Scientific Computing Division in collaboration with U.C. Davis and Ohio State University.
www.vapor.ucar.edu   (208 words)

 Water Vapor Transport - Technical Information   (Site not responding. Last check: )
Water vapor imagery, from the 6.7 µm channel on the GOES geostationary satellites, is used to study upper-tropospheric water vapor transport.
The key parameters required for the estimation of water vapor transport from geostationary satellite data are the specific humidity and the corresponding wind field associated with the moisture fields.
Because the specific humidity is derived directly from the water vapor imagery, so called "water vapor winds" produced as a result of tracking features in the 6.7 µm water vapor channel imagery as a function of time are determined.
wwwghcc.msfc.nasa.gov /irgrp/wvti_tech.html   (496 words)

 PF Online Feature Article - Vapor Degreasing
Spray degreasers are similar to standard vapor degreasers except for the spraying system, which consists of solvent pump, filter canister and spray wand and/or a fixed spray header.
Vapor degreasing can be a highly efficient method of cleaning, using a fraction of the energy of other processes with no water pollution.
That heat is not available from a solvent vapor at a boiling point that is the same temperature as the part and remaining liquid solvent.
www.pfonline.com /articles/pfd0303.html   (2113 words)

 DER Vapor Intrusion Main Page
Historically, we thought that vapor intrusion was only an issue where the source of the contaminants was very shallow and the magnitude of the contamination was very great.
Subsurface vapor samples consist of both soil vapor samples collected from the ground away from buildings (soil gas samples) and sub-slab soil vapor samples collected from immediately beneath the foundation or slab of a building (sub-slab samples).
The length of a soil vapor investigation will depend on the data that is collected during the investigation, and is only considered to be complete when all of the exposures and potential exposures have been addressed.
www.dec.state.ny.us /website/der/guidance/vapor   (1674 words)

The vapor of water produced by boiling, especially in its economic relations, is called steam.
Vapor is any substance in the gaseous condition at the maximum of density consistent with that condition.
The vapor density of gases and vaporizable substances as compared with hydrogen, when multiplied by two or when compared with air and multiplied by 28.8, gives the molecular weight.
www.beetfoundation.com /words/v/vapor.html   (595 words)

 Human Health Hazards - Vapor Intrusion
Vapor intrusion is similar to how radon, a naturally occurring radioactive gas, can enter a home through cracks in the foundation.
Vapor intrusion is uncommon, but should be considered whenever there is a known source of soil or groundwater contamination nearby.
When vapor intrusion does occur, the health risk will often be lower than that posed by radon or by chemicals owned and used by the resident.
www.dhfs.state.wi.us /eh/Air/fs/VI.htm   (1145 words)

 Understanding Vapor Barriers | DoItYourself.com
It is the purpose of the vapor barrier to prevent that movement or penetration of moisture from one area to another.
One of the most important vapor barriers in the home is the one between the wall insulation and the interior side of exterior walls.
Typically a layer of 6-mil plastic (1 mil = 1/1000 of an inch) that is laid directly on the dirt floor of the crawl space, the moisture barrier prevents ground moisture from entering the enclosed crawl space and wetting the insulation or the framing.
www.doityourself.com /stry/vaporbarriers   (947 words)

 vapor - Search Results - MSN Encarta
Vapor, in physics, term for substances in the gaseous state (Gases; Matter, States of).
Vapor Pressure, pressure created by the vapor, or gas, of a substance that forms above a liquid or solid of the same substance.
When any substance intended to effect, or assist in, the cure of disease is added to the bath medium, the bath is called medicated.
encarta.msn.com /encnet/refpages/search.aspx?q=vapor   (194 words)

 Steam Shower | Steam Cabin | Sauna Rooms by Di Vapor UK
Di Vapor (pronounced 'Dee Vah-por') steam showers specialise in luxury bathroom steam shower cabins, home steam sauna rooms and hydromassage T.V. bathtubs.
All of our UK shower models and designs are unique to Di Vapor.
You can be assured that Di Vapor has paid close attention to quality, aesthetic appeal, whilst keeping pace with the progress of science and technology with its computerised steam rooms, whirlpool bathtubs, infrared saunas and sauna steam units.
www.divapor.com   (517 words)

 AGU Web Site: Water Vapor in the Climate System. A Special Report.
However, because atmospheric concentrations of water vapor tend to be at most only a few percent of the amount of air (and usually much lower), they are both often expressed in units of grams of water vapor per kilogram of (moist or dry) air.
Water vapor is constantly cycling through the atmosphere, evaporating from the surface, condensing to form clouds blown by the winds, and subsequently returning to the Earth as precipitation.
As is shown in Figure 3, almost all water vapor in the atmosphere originates at the surface of the Earth, where water evaporates from the ocean and the continents owing to the Sun's radiation, and is transpired by plants and respired by animals into the atmosphere.
www.agu.org /sci_soc/mockler.html   (4752 words)

 The MSDS HyperGlossary: Vapor Pressure
The vapor pressure of a liquid is the pressure exerted by its vapor when the liquid and vapor are in dynamic equilibrium.
It is important to specify the temperature when stating a vapor pressure because vapor pressures increase with temperature.
The vapor pressure of mixtures is dealt with using Raoult's Law.
www.ilpi.com /msds/ref/vaporpressure.html   (649 words)

 Mercury Vapor   (Site not responding. Last check: )
Mercury vapor is the vapor generated from elemental liquid mercury or compounds of mercury.
Mercury vapor is reported to be mutagenic in humans, causing aneuploidy in lymphocytes of exposed workers [Hathaway et al.
Before a worker is placed in a job with a potential for exposure to mercury vapor, a licensed health care professional should evaluate and document the worker's baseline health status with thorough medical, environmental, and occupational histories, a physical examination, and physiologic and laboratory tests appropriate for the anticipated occupational risks.
www.osha-slc.gov /SLTC/healthguidelines/mercuryvapor/recognition.html   (3284 words)

 In Situ Soil Vapor Extraction   (Site not responding. Last check: )
The contaminated vapors are then moved by a vacuum blower to a vapor treatment process, such as a carbon adsorption unit.
Vapor and liquid treatment residual must be properly managed to protect against release onto land or into ground or surface water.
Vapor pressure is the force exerted by the vapor of the chemical in equilibrium with its pure solid or liquid form.
es.epa.gov /techinfo/case/comm/soilvape.html   (2066 words)

 Vapor Systems - Vapor Steam Cleaners - Products Home
Vapor Systems is launching an exciting line of new vapor steam cleaners for 2006.
Vapor is comprised of droplets smaller and hotter than steam.
The Steam Vapor Vac is the first vapor steam cleaner in its class to combine a continuous vapor flow operation with a vacuum of advanced efficiency that goes beyond standard vacuum filtration.
vapor-systems.com /products.htm   (360 words)

 Vapor - Wikipedia, the free encyclopedia
Fixed gases are gases for which no liquid or solid can form at the temperature of the gas (such as air at standard temperature).
The vapor pressure is the equilibrium pressure from a liquid (or solid) at a specific temperature.
The slowest to vaporize is the base note.
en.wikipedia.org /wiki/Vapor   (417 words)

 YOJOE.COM | Vapor
Vapor was released as part of the ninth series (1990), packaged exclusively with the Cobra Hurricane V.T.O.L. He was discontinued domestically in 1991.
No variations of Vapor are known to exist.
Vapor's body mold is entirely original and not made up from previous molds.
www.yojoe.com /action/90/vapor.shtml   (65 words)

Vapor’s music pushes you through doors with their signature arrangements.
Vapor’s shows are the most important way to bond with our audience.
Vapor’s popularity has allowed them the opportunity to do a live interview on 94.5 The Buzz in Houston (4th largest Modern rock station in the country) where they had several songs showcased on The Texas Buzz Show.
www.myspace.com /vapor   (645 words)

 CIMSS Water Vapor Imagery Tutorial -- Introduction and History
Water vapor comprises only 1-4% (by volume) of the atmosphere, yet it plays a critical role (along with carbon dioxide, ozone, and other so-called "greenhouse gases") in the Earth's energy balance.
On a water vapor image, each pixel is assigned a gray shade according to the measured brightness temperature.
Water vapor is therefore a "passive tracer" which can be used to represent three-dimensional atmospheric motions on the meso and synoptic scale.
cimss.ssec.wisc.edu /goes/misc/wv/wv_intro.html   (830 words)

 Stage II Vapor Recovery
When using Stage I Vapor Recovery equipment, the escape of gasoline vapors is held to a minimum, helping to limit the escape of pollutants that contribute to air pollution.
Stage I Vapor Recovery rules are specifically described under Sections 215.583, 218.583, and 219.583 of Title 35 of the Illinois Administrative Code.
When using Stage II Vapor Recovery equipment, the escape of gasoline vapors is held to a minimum, helping to protect the customers from the harmful effects of gasoline fumes as well as minimizing the escape of pollutants that contribute to air pollution.
www.epa.state.il.us /air/stage-ii-vapor-recovery.html   (1426 words)

 Vapor Barriers and House Wraps
Vapor passes through construction materials due to the permeability of the construction materials.
Vapor is not a problem until it reaches its dew point and condenses into moisture and deteriorates the building materials of wall, roof, and floor assemblies.
I have seen that deteriorated decking and rafters due to the lack of a vapor barrier or an inadequate vapor barrier.
www.codecheck.com /vaporbarrier_ng.htm   (5877 words)

 EPA Corrective Action: Vapor Intrusion Guidance
Vapor intrusion is a rapidly developing field of science and policy.
This draft guidance is intended to aid in evaluating the potential for human exposure from this pathway given the state-of-the-science at this time.
E-Docket is an on-line system that allows viewers to search the Agency's major public dockets on-line, view the index listing of the contents for the dockets included in the system, and access those materials that are available on-line.
www.epa.gov /correctiveaction/eis/vapor.htm   (356 words)

 NJDEP SRWM - Guidance: Vapor Intrusion Pathway - Indoor Air
The presence of volatile chemicals in contaminated soil or ground water offers the potential for chemical vapors to migrate through subsurface soils and/or preferential pathways (such as underground utilities) thereby impacting the indoor air quality of area buildings.
Vapor intrusion refers to this migration of volatile chemicals from the subsurface into overlying buildings.
For site-specific questions on vapor intrusion pertaining to cases within the Department, interested parties should contact the case manager directly.
www.nj.gov /dep/srp/guidance/vaporintrusion   (374 words)

 Subject Top Page: Vapor Recovery Program
The ARB evaluates and tests new or modified vapor recovery systems.
These systems recover the gasoline vapors generated while fueling vehicles in a service station.
The goal of the program is to assure that the vapor recovery systems which meet the stringent certification requirements are certified expeditiously.
www.arb.ca.gov /vapor/vapor.htm   (155 words)

Try your search on: Qwika (all wikis)

  About us   |   Why use us?   |   Reviews   |   Press   |   Contact us  
Copyright © 2005-2007 www.factbites.com Usage implies agreement with terms.