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Topic: Amount of substance

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	Method of measuring dialysis or clearance of hemodialysis systems - Patent 6702774
		The amount of substance riot dialyzed in the dialyzer is measured downstream of the dialyzer by said sensor by integrating the concentration over time.
		The method according to the invention is characterized by adding a pre determined amount of a substance to the dialysate circuit upstream of the dialyzer and by measuring the amount of said substance leaving the dialyzer downstream in the dialysate and calculating the dialysance or clearance respectively for the substance added.
		Alternatively to the injection of a liquid substance the addition of an amount of a substance is possible by conveying the dialysate through a powder cartridge or powder bag for a short period.
	www.freepatentsonline.com /6702774.html (4381 words)

	Amount of substance - Wikipedia, the free encyclopedia
		Amount of substance of an object is a physical quantity that measures the number of elementary entities in the object compared with the number of elementary entities in 0.012 kilogram of pure carbon-12 (elementary entities may be atoms, molecules, ions, electrons, or particles).
		The SI unit for amount of particulate substance is the mole (mol)
		The amount of substance is not the same as the amount of matter (mass).
	en.wikipedia.org /wiki/Amount_of_substance (113 words)

	Chemical Sciences: Molar Stoichiometry: Mole: Amount of Substance
		The mole is the SI unit for amount of substance.
		Chemists use both intensive properties, which are characteristic of a substance and independent of the amount of the substance, and extensive properties, which are characteristic of a substance and directly proportional to the amount of the substance.
		Example: the heat capacity of a substance is the amount of heat required to change its temperature, while the specific heat capacity or specific heat of a substance is the amount of heat required to change its temperature per gram or kilogram of the substance.
	www.psigate.ac.uk /newsite/reference/plambeck/chem1/p01031.htm (691 words)

	Rreporting On Risk \| Exposure Assessment Basics
		Measuring the amount of a substance in the environment is usually straightforward for short-term exposures.
		After the amount of the substance in the environment is assessed, the route of exposure must be determined-inhalation, ingestion, or skin contact-and the amount that people take in is then estimated.
		That is, once the exposure assessment has estimated the amount of a substance the population of interest has actually been exposed to, then the results of the toxicity assessments can be used to estimate the degree of harm to that population.
	www.facsnet.org /tools/ref_tutor/risk/ch2expos.php3 (1744 words)

	amount of substance
		The amount of substance (symbol n) of an element.
		The SI unit of amount of substance is the mole.
		The amount of substance is not usually measured directly.
	www.daviddarling.info /encyclopedia/A/amount_of_substance.html (136 words)

	Intute sciences - Chemical Sciences: Molar Stoichiometry: Mole: Amount of Substance
		For this reason the amount of a substance is usually calculated from other measured quantities such as mass or volume.
		Chemists use both intensive properties, which are characteristic of a substance and independent of the amount of the substance, and extensive properties, which are characteristic of a substance and directly proportional to the amount of the substance.
		Example: the heat capacity of a substance is the amount of heat required to change its temperature, while the specific heat capacity or specific heat of a substance is the amount of heat required to change its temperature per gram or kilogram of the substance.
	www.intute.ac.uk /sciences/reference/plambeck/chem1/p01031.htm (699 words)

	PSY240S_27_03_01
		The diagnosis of substance intoxication is only given when the behavioural and psychological changes cause significant disruptions in the person’s social and family relationships, occupational or financial problems, or place the person at risk for adverse effects e.g., accidents, medical ailments, legal problems.
		Substance Abuse · The diagnosis of substance abuse (SA) is given when the person’s recurrent use of a substance results in significant harmful consequences.
		Symptoms of Substance Dependence · Tolerance to the substance, indicated by a need fort increased amounts of the substance to achieve intoxication and or by a diminished effect of the same amount of substance with continued use, is experienced.
	www.geocities.com /CollegePark/Bookstore/2603/PSY240S_27_03_01.html (3160 words)

	[No title] (Site not responding. Last check: )
		In this condition, furthermore, the flow of liquid substance from the container towards the porous mass is not stopped, so that an excessive use of liquid substance occurs, which causes in turn a decrease of the service life of the device.
		Thanks to these features, it is advantageously possible to guarantee the delivery of dosed amounts of active substance at each water flushing independently of both the amount of substance provided in the container and of the chemical- physical properties of the active substance and of the frequency of the flushing operations.
		The device 1 comprises a container 3 of the active substance, a supporting structure 4, hooking means 5 of the container 3 and of the supporting structure 4 for suspending the same from the rim of the bowl 2 and means 6 for delivering dosed amounts of the active substance.
	www.wipo.int /cgi-pct/guest/getbykey5?KEY=01/04428.010118&ELEMENT_SET=DECL (3451 words)

	Rreporting On Risk \| Exposure Assessment Basics
		Measuring the amount of a substance in the environment is usually straightforward for short-term exposures.
		After the amount of the substance in the environment is assessed, the route of exposure must be determined-inhalation, ingestion, or skin contact-and the amount that people take in is then estimated.
		That is, once the exposure assessment has estimated the amount of a substance the population of interest has actually been exposed to, then the results of the toxicity assessments can be used to estimate the degree of harm to that population.
	facsnet.org /tools/ref_tutor/risk/ch2expos.php3 (1744 words)

	Molar volume - Wikipedia, the free encyclopedia
		In chemistry, the molar volume of a substance is the ratio of the volume of a sample of that substance to the amount of substance (usually in mole) in the sample.
		The molar volume is usually given for a solid substance at 298.15 K (temperature of standard state).
		Apart from temperature and density, it depends on phase and allotrope of the substance.
	en.wikipedia.org /wiki/Cubic_metre_per_mole (195 words)

	NationMaster - Encyclopedia: Sodium nitrate
		The boiling point of a substance is the temperature at which it can change its state from a liquid to a gas throughout the bulk of the liquid at a given pressure.
		In physics, Density is defined as mass m per unit volume V. Mathematically, it is expressed as where, in SI units: Ï (rho) is the density of the substance, measured in kg m-3 m is the mass of the substance, measured in kg v is the volume of the substance...
		The standard enthalpy of formation or standard heat of formation of a compound is the change of enthalpy that accompanies the formation of 1 mole of a substance in its standard state from its constituent elements in their standard states (the most stable form of the element at 1 atmosphere...
	www.nationmaster.com /encyclopedia/Sodium-nitrate (1694 words)

	[No title] (Site not responding. Last check: )
		Assume that the amount of substance F originally injected was 1.2 mg, and the original amount of substance M was 2.4 mg.
		The [Urine] (mg/ ml urine) of Substance F is 0.06 and 0.0 for Substance M. The Rate or urine formation is 0.5 ml/min.
		Substance F has a PA (mg/100 ml plasma) of 0.48 and a PV in renal vein (mg/100 ml plasma) of 0.24.
	www.life.umd.edu /classroom/bscI440/sukharev/RenalQuiz_fall04.doc (338 words)

	Self-crosslinking water-dilutable binders - Patent 6670041
		The amount of maleic anhydride is chosen such that the carboxyl compound prepared therefrom has an acid number of from 30 to 130 mg/g, preferably from 35 to 80 mg/g.
		The ratio of the amount of substance of the available epoxide groups of the epoxy resin A1 to that of the primary amino groups in A2 is preferably from 1:0.6 to 1:1.0 mol/mol.
		The formaldehyde is used in an amount such that the ratio of the amounts of substance of formaldehyde to formaldehyde-reactive groups in the reaction mixture is from 25 to 90, preferably from 30 to 85, with particular preference from 60 to 80 mol/(100 mol).
	www.freepatentsonline.com /6670041.html (3631 words)

	Phase Diagram (Site not responding. Last check: )
		As the substance is subjected to the temperature and pressure pairs that follow this line the solid and liquid phases to coexist in equilibrium.
		As the substance is subjected to the temperature and pressure pairs that follow this line the solid and gas phases to coexist in equilibrium.
		At the normal boiling temperature the liquid substance vaporizes with a vapor pressure of 1 Atmosphere or 760 Torr, as the substance is heated.
	invsee.asu.edu /ed/phase/phasefeat.htm (549 words)

	Substance
		Amount of substance Amount of substance of an object is a carbon-12 (elementary entities may be atoms, molecules, ions,...
		Substance In philosophy, substance means, approximately, that element of an attributess and modes.
		Volatile substance abuse Volatile substance or solvent abuse (called huffing) is the practice of inhaling volatile subs...
	www.brainyencyclopedia.com /topics/substance.html (254 words)

	BIPM - mole
		Amount of substance is defined to be proportional to the number of specified elementary entities in a sample, the proportionality constant being a universal constant which is the same for all samples.
		The unit of amount of substance is called the mole, symbol mol, and the mole is defined by specifying the mass of carbon 12 that constitutes one mole of carbon 12 atoms.
		However, in the field of clinical chemistry the name "amount of substance concentration" is generally abbreviated to "substance concentration".
	www.bipm.fr /en/si/base_units/mole.html (764 words)

	NIST Guide to SI Units - 8 Comments on Some Quantities and Their Units
		Amount of substance is one of the seven base quantities upon which the SI is founded (see Sec.
		It is the ratio of the amount of substance of B to the amount of substance of the solvent substance:
		amount of substance of B divided by the volume of the mixture:
	physics.nist.gov /Pubs/SP811/sec08.html (2701 words)

	Helge Strömdahl - 1996
		Via the theory it is shown that the defaulting attainment of the 1971 convention among the educators is a consequence of a non-apprehension of the base physical quantity amount of substance, and thereby the conceptual habitat of the SI unit 1 mol.
		The non-attainment of amount of substance and its unit 1 mol is an example of the fact that concepts are theory-laden and can only be attained within the theories to which they belong.
		Hence, the representatives of the International Union of Pure and Applied Chemistry (IUPAC) are addressed to reconsider the commentary on amount of substance and the unit 1 mol in the IUPAC manual, inter alia in view of the results of the present investigation.
	www.ped.gu.se /biorn/A.gamla_phgrsajten/diss.abstr/stromdahl.html (557 words)

	Substance Abuse Treatment presented by Substance Abuse Treatment .info
		Remaining in substance abuse treatment for an adequate period of time is critical for treatment effectiveness and positive change.
		Each person is different and the amount of time in treatment will depend on his or her problems and needs.
		The ultimate goal of all substance abuse treatment is to enable the individual to achieve lasting abstinence, but the immediate goals are to reduce drug use, improve the patient's ability to function, and minimize the medical and social complications of drug abuse.
	www.substanceabusetreatment.info (638 words)

	Setting up a colorimetric assay
		When we run an assay we must ensure that only the substance we are assaying is responsible for absorbance of light in the wavelength range of interest.
		Beyond some maximum amount or concentration an assay becomes saturated, that is, increases in amount or concentration do not affect absorbance.
		A standard curve is obtained by plotting absorbance versus amount of substance X. If the relationship is clearly linear, a standard curve isn't even necessary.
	www.ruf.rice.edu /~bioslabs/methods/protein/protcurve.html (1774 words)

	ATSDR - Glossary of Terms
		An average or expected amount of a substance or radioactive material in a specific environment, or typical amounts of substances that occur naturally in an environment.
		A study that uses (a) biomedical testing or (b) the measurement of a substance [an analyte], its metabolite, or another marker of exposure in human body fluids or tissues to confirm human exposure to a hazardous substance [also see exposure investigation].
		The combined effect of the substances acting together is greater than the sum of the effects of the substances acting by themselves [see additive effect and antagonistic effect].
	www.atsdr.cdc.gov /glossary.html (4100 words)

	Tips for the Teacher (pg26)
		By international convention (SI), the amount of a substance is measured in moles.
		The amount of acid, in moles, is found from the relationship;
		This is emphatically illustrated by discussing the relative effects of 1 drop of concentrated sulfuric acid(0.05 ml of 18M H2SO4) and 9 L of 0.1M sulfuric acid.
	www.okstate.edu /jgelder/acidPage26.html (360 words)

	TOPIC OVERVIEW
		the amount of substance of a system that contains as many elementary entities as there are atoms in 0.012 kg of carbon 12.
		The molar mass (mass of one mole) of a substance is the sum of the relative atomic masses (in grams) of the elements in a formula unit of the substance.
		The amount of a substance (expressed in moles) is related to the mass of substance, and for a gaseous substance, to its volume.
	intro.chem.okstate.edu /ChemSource/Moles/mole2.htm (551 words)

	Definition of Amount of substance
		Amount of substance of an object is a physical quantity that measures the number of elementary entities in the object compared with the number of elementary entities in 0.012 kilogram of pure carbon-12 (elementary entities may be atoms, molecules, ions, electrons, or particles).
		This latter quantity is deemed a unit amount of substance.
		The amount of substance of an object is a separate physical quantity, and should not not be confused with, the amount of matter or mass of an object, which has the SI unit of kilogram (kg).
	www.wordiq.com /definition/Amount_of_substance (182 words)

	BIPM - amount of substance
		All quantitative results of chemical analyses or of dosages can be expressed in units of amount of substance of the elementary entities, for which the base unit is the mole.
		The simplest case is that of a sample of a pure substance that is considered to be formed of atoms; call X the chemical symbol of these atoms.
		Other methods for the measurement of amount of substance are based on the laws of physics and physical chemistry.
	www1.bipm.org /en/si/si_brochure/appendix2/substance.html (398 words)

	Search Results for amount - Encyclopædia Britannica (Site not responding. Last check: )
		The mole is defined as the amount of substance containing the same number of chemical units (atoms, molecules, ions, electrons, or other specified entities or groups of entities) as exactly 12 grams...
		The long-term average amounts of precipitation for a season, or a year, give little information on the regularity with which rain may be expected, particularly for regions where the average amounts...
		The tenderness of meat is influenced by a number of factors including the grain of the meat, the amount of connective tissue, and the amount of fat.
	www.britannica.com /search?query=amount&submit=Find&source=MWTEXT (573 words)

	CHE 11 Lab-Calorimetry
		The heat capacity of a substance is the amount of heat required to raise the temperature of a certain amount of substance by 1° C. Heat capacities may be expressed on a molar basis or a gram basis; in the later case, the heat capacity is known as the specific heat, C
		A calorimeter is a device used to measure the amount of heat transferred during a process.
		The amount of heat lost by the hot object would be equal to the amount of heat gained by the cold object.
	web.centre.edu /che/che11_lab/calorimetry.htm (1386 words)

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