
	Where results make sense

Topic: The Mixtures

	ATSDR - Chemical Mixtures Program
		Simple mixtures of environmentally important chemicals such as arsenic, cadmium, chromium and mercury are being studied.
		Dose-response relationships are being studied using mixtures of liver toxicants such as chloroform and trichloroethylene.
		Mixtures of chemicals such as polychlorinated biphenyls (PCBs) and pentachlorophenol are being studied in the presence of chemicals that are found together and can influence skin absorption rates.
	www.atsdr.cdc.gov /mixtures.html (548 words)

	CHEMystery: Atoms and Molecules: Mixtures (Site not responding. Last check: 2007-11-05)
		An example is a thoroughly stirred mixture of salt in water or sugar in water.
		A mixture of sand and water is an example of a suspension.
		A colloidal dispersion is a mixture in which the dispersed molecules are very small.
	library.thinkquest.org /3659/atommole/mixtures.html (430 words)

	Our Stolen Future: Mixtures of chemicals
		With any one person carrying detectable levels of several hundred chemicals at one time, and with the mixtures varying from person to person, it is beyond the capacity of modern science to test all mixtures, or even all common mixtures.
		The Food Quality Protection Act of 1996 acknowledged that mixtures are the rule rather than the exception, and began to lay the groundwork for a new approach by requiring that compounds with similar mechanisms of action be considered jointly when calculating whether exposures have exceeded tolerance levels.
		In the meantime, new scientific studies of mixtures and synergies are emerging with increasing frequency.
	www.ourstolenfuture.org /NewScience/synergy/mixtures.htm (720 words)

	Mixtures and Substances HomePage
		Mixtures have a variable composition, since they can have different amounts of component substances, and hence their properties are variable and usually nondistinct.
		Heterogeneous mixtures are mixtures in which the composition is not uniform, such as chunks of one substance mixed with another or a layer of one substance over another.
		A mixture of solid particles in a liquid can be separated by pouring the mixture through a filter that traps the solid particles while the liquid passes through in a process called filtering.
	ch185.semo.edu /mixtures/mixtures.html (1055 words)

	Our Stolen Future: Mixtures confound epidemiology
		Mixtures can make it difficult to detect impacts of contaminants even when the individual components of the mixtures cause strong effects individually.
		For epidemiological studies that focus on individual components within mixtures, the fewer the number of similarly-acting contaminants in mixtures and the stronger their individual impacts, the more likely it is that a cause-effect relationship can be established.
		And, recent research has established that mixtures of xenoestrogens, each at levels at which they cause no effect, can dramatically increase the effect of natural estrogen.
	www.ourstolenfuture.org /Myths/epimixtures.htm (805 words)

	Mixtures - Succeed in Physical Science (Site not responding. Last check: 2007-11-05)
		As long as you did not ignite the mixture with a match so that it would explode in a chemical reaction, the combination would form a mixture that could be separated by the different weights of the gases.
		A mixture of stones in soil is an example of a heterogeneous mixture.
		Suspension mixtures have larger particles and are heterogeneous.
	www.school-for-champions.com /science/chemixtures.htm (1441 words)

	Dirichlet Mixtures and other Regularizers (Site not responding. Last check: 2007-11-05)
		The recode4.20comp mixture was re-optimized from fournier-fssp.20comp on the fssp-3-5-98-select-0.8-3.cols data set, to minimize the errors in estimating distributions from samples of 1, 2, or 3 amino acids.
		This mixture is very good at computing the likelihood of a given amino-acid distribution, but is not as good at estimating the distribution given a sample of one or two amino acids from the distribution.
		The component that 9-component mixtures have for "highly conserved residues" is also split into two components (one mainly for C and W, the other mainly for P and G---these should probably both be split further, to get down to components dominated by a single residue).
	www.cse.ucsc.edu /research/compbio/dirichlets/index.html (1699 words)

	Tree mixtures within integrated farming systems
		There are some studies of the effect of mixtures of temperate (Cassida et al 1994; Glenn 1989) and tropical (Brown and Pitman 1991) grasses and legumes but until recently, none on the effects of mixtures of fodder tree leaves on digestion.
		The results of this study suggested that associative effects of mixtures of tree leaves are governed by the degree of synchronisation of the fermentation rates of the different components of the mixture and these, in turn, are dependent on the fermentability of their chemical constituents.
		Mixtures of leaves of plant material high in rapidly fermentable carbohydrates with material high in soluble and fermentable nitrogen showed the greatest effect of all.
	www.cipav.org.co /lrrd/lrrd9/4/mauro941.htm (5201 words)

	Table 1
		In summary, small grain/pea mixtures produe forage higher in protein and lower in fiber than pure small grain silage with minimal yield changes.
		Characteristics of oats and oat-pea mixtures harvested as forage at Arlington, Wisconsin in 1986-88.
		Characteristics of barley and barley-pea mixtures harvested as forage at Arlington, Wisconsin in 1986-88.
	www.uwex.edu /ces/forage/pubs/Pea_and_Small_Grain_Mixtures.htm (873 words)

	Review of Elements, Compounds, and Mixtures
		The law of constant composition states that the ratio by mass of the elements in a chemical compound is always the same, regardless of the source of the compound.
		Brass is an example of a mixture of two elements: copper and zinc.
		Mixtures, such as the atmosphere, contain two or more substances that are relatively easy to separate.
	chemed.chem.purdue.edu /genchem/topicreview/bp/ch2/mixframe.html (904 words)

	8th Grade Matter - mixtures
		Mixtures are formed by mixing physically (not chemically) substances together.
		Mixtures can be categorized as heterogenous or homogeneous.
		Heterogenous mixtures do not appear to be the same throughout.
	www.usoe.k12.ut.us /curr/science/sciber00/8th/matter/sciber/matter.htm (289 words)

	Bituminous Mixtures Laboratory (BML) - Labs - Research - Asphalt - Pavements - FHWA (Site not responding. Last check: 2007-11-05)
		The lab's activities are aimed at extending the life and improving the performance of asphalt pavement, reducing vehicle tear-and wear, and shortening construction delays.
		Consequently, mixtures with few or no signs of damage can be selected for reliable, long-term highway use.
		Extraction and recovery of asphalt binders and aggregates may be performed on the mixtures.
	www.fhwa.dot.gov /pavement/asphalt/labs/mixtures/index.cfm (473 words)

	Wildflower Conservation Mixtures, wild flower mixtures for the garden (Site not responding. Last check: 2007-11-05)
		Under the popular mixtures I have included the species included in the mixture as an example of the packet contents and cultural information, the species listed are suitable for the relevant conditions listed.
		A mixture of fine grasses and low growing wildflowers which can be maintained as a lawn from October to April and mown infrequently between flushes of wildflowers during the summer.
		Contains a mixture of 75% colourful and attractive wild flowers and 25% grasses, selected for their value in creating habitats which encourage beneficial insects to colonise in your garden.
	www.nickys-nursery.co.uk /seeds/pages/mixture.htm (2386 words)

	Mixtures
		A mixture would be more like a green salad where the different vegetables can be put together when a bowl, but can be easily separated where a compound is more like a baked cake where it would be very difficult to separate out the ingredients once the cake is baked.
		A solution is a mixture of two or more substances in which one or more of these substances (solutes) is dissolved in another substance such as water or another sort of liquid (solvent).
		A colloid is a type of mixture in which one substance is split up into tiny particles and spread throughout another substance.
	www.mcwdn.org /chemist/mixture.html (319 words)

	Equipment - Bituminous Mixtures Laboratory (BML) - Labs - Research - Asphalt - Pavements - FHWA (Site not responding. Last check: 2007-11-05)
		It loads a cylindrical asphalt concrete specimen through its diametrical axis, and the resulting deformations are used to determine the viscoelastic material properties used in models that predict pavement performance.
		Hamburg Wheel-Tracking Device - Measures the rutting and moisture susceptibility of an asphalt paving mixture by rolling a steel wheel across the surface of an asphalt concrete slab that is immersed in hot water (generally held at 50°C.) Susceptibilities to rutting and moisture are based on pass/fail criteria.
		The mixture is placed in a mold and loaded through a series of vertically aligned steel plates that compress the asphalt mixture into a flat slab of predetermined thickness and density.
	www.fhwa.dot.gov /pavement/asphalt/labs/mixtures/bmlequip.cfm (777 words)

	Rules -2002 "Chemical Mixtures Containing gamma-Butyrolactone"
		DEA is seeking this information to help determine whether there are chemical mixtures (as defined in 21 U.S.C. 804(40)) containing GBL which should be exempt from the regulations governing listed chemicals, pursuant to 21 U.S.C. 802(39)(A)(v).
		Exempt chemical mixtures are those formulations that contain any listed chemical, but are not subject to the regulatory controls of the Controlled Substances Act (CSA) that pertain to listed chemicals.
		Until regulations which delineate criteria and procedures for exempting specific GBL-containing chemical mixtures are finalized, according to 21 U.S.C. 802(39)(4)(v), DEA has treated GBL-containing chemical mixtures as being exempt from the chemical regulatory requirements of the CSA.
	www.deadiversion.usdoj.gov /fed_regs/rules/2002/fr0719.htm (1006 words)

	Mixtures and solutions (Site not responding. Last check: 2007-11-05)
		A homogeneous mixture is called a solution: salt or sugar and water, air (solution of gases).
		A heterogeneous mixture would be: salt with sugar (no water), water with gasoline or oil, salt with sand.
		A rule of thumb; mixtures can be "unmixed" by physical means, while solutions cannot (one would need to boil all the water out of a sugar solution to separate the sugar from the water).
	www.newton.dep.anl.gov /askasci/chem99/chem99334.htm (439 words)

	FOSS Mixtures and Solutions Glossary (Site not responding. Last check: 2007-11-05)
		As students conduct the investigations in the FOSS Mixtures and Solutions Module, vocabulary is introduced naturally after students have had an experience to which to connect the new words.
		The relative amount of a substance in a mixture.
		A special mixture formed when one or more materials dissolves in another.
	www.fossweb.com /modules3-6/MixturesandSolutions/vocab.html (635 words)

	The Mixtures - AOL Music
		Explanation of mixtures - Succeed in Physical Science and Chemistry.
		In 1970, now with a completely different line-up, The Mixtures scored two...
		Download, listen and watch The Mixtures music, mp3's, song lyrics, music videos, Internet radio, live performances, concerts, and more on AOL Music.
	music.aol.com /artist/the-mixtures/24603/main (77 words)

	Mixture or Solution? (Site not responding. Last check: 2007-11-05)
		Follow this link to get to the FOSS Mixtures and Solutions site.
		When you have the analyzer reports back, put a check on the chart to indicate the correct answer.
		On your answer sheet, explain the difference between a mixture and a solution.
	www.udel.edu /sine/students/mixtures (131 words)

	Mixtures
		Mouth to mouth: saliva transfer can help animals communicate, medicate, or even kill.
		Evolution has given rise to a variety of salivary mixtures that are being mined for ways to help save human lives
		That familiar refrain in country-and-western songs, "You don't miss it 'til it's gone," is a good way to describe saliva.
	www.mixtures.info (2363 words)

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