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	Les Ames - Wikipedia, the free encyclopedia (Site not responding. Last check: 2007-11-06)
		Leslie ("Les") Ethelbert George Ames (born 3 December 1905 in Elham, Kent; died 27 February 1990 in Canterbury, Kent) was an outstanding wicket-keeper and batsman for the England cricket team and Kent County Cricket Club.
		Ames scored 123 runs in the session which is a record for most runs before lunch in Test cricket.
		Ames served with the Royal Air Force during, rising to the rank of Squadron Leader, and returned to play as a batsman for Kent after the war.
	en.wikipedia.org /wiki/Leslie_Ames (429 words)

	Ames test - Wikipedia, the free encyclopedia (Site not responding. Last check: 2007-11-06)
		The Ames test is a biological assay used in genetics, generally genetic toxicology, to test for mutagenic properties of a chemical compound.
		The experimental cultures are exposed to the agent to be tested while the positive control cultures are exposed to a known mutagen to confirm that there has been no contamination of the strain.
		Occasionally a tested agent will be toxic enough to simply kill the bacterial culture in which case a "thin lawn" is observed.
	en.wikipedia.org /wiki/Ames_test (359 words)

	FDA/CFSAN Redbook 2000 IV.C.1.a. Bacterial Reverse Mutation Test
		The principle of this bacterial reverse mutation test is that it detects chemicals that induce mutations which revert mutations present in the tester strains and restore the functional capability of the bacteria to synthesize an essential amino acid.
		If a test substance derived from biological material causes an increase in mutant colonies in a bacterial mutagenicity test, the possibility that such an increase may be due solely to the presence of histidine or tryptophan in the test substance should be evaluated.
		Thompson, E.D. and Melampy, P.J. (1981) An Examination of the Quantitative Suspension Assay for Mutagenesis With Strains of Salmonella typhimurium.
	vm.cfsan.fda.gov /~redbook/redivc1a.html (4015 words)

	ames (Site not responding. Last check: 2007-11-06)
		The Ames test is a screening assay for carcinogens that uses bacteria to detect chemical mutagens.
		In the Ames test, a strain of Salmonella typhimurium auxotrophic for histidine (his-), defective in dark repair of mutations (uvrB), and unable to synthesize a portion of the cell wall (rfa) is exposed to chemicals.
		Solid test chemicals may be used as solids or you may dissolve it or make a suspension by placing some in a sterile tube with a small amount of sterile water.
	biology.fullerton.edu /biol302/302labf99/ames.html (775 words)

	Bestselling author Michael Fumento reports: "Leaders & Success — Bruce Ames."
		Ames burst on the national scientific scene in the early 1970s with the development of a method, generally dubbed the Ames Test or the Ames Mutagenicity Test, to determine what chemicals caused a certain bacteria to mutate.
		Ames notes that while Americans are focusing on synthetic chemicals that may cause cancer in humans even to levels of parts per quintillion - that is, per 1,000,000,000,000,000,000 - many of those same Americans are blissfully ignorant of the natural carcinogens.
		The obsession with synthetic pesticides, says Ames, is rather absurd when one considers that natural pesticides produced by plants to ward off insects or animals, which are proving carcinogenic in lab animal tests just as often as their synthetic counterparts, constitute over 99.99% of all the pesticides we eat.
	www.fumento.com /ames.html (1144 words)

	11.30.94 - Better Test for Carcinogens
		The original Ames test, reported in 1975 by Berkeley biochemist Bruce N. Ames and his colleagues here, was intended as a quick, reliable screen for chemicals that cause mutations in the genetic material DNA and thus could potentially cause cancer in humans.
		The test revolutionized the field of genetic toxicology and was quickly adopted as a standard by everyone from government laboratories to industry to identify potentially harmful chemicals.
		The Ames II assay uses the same bacteria--a strain of salmonella bacteria that infects mice--but is able to detect the precise mutation caused by a chemical.
	www.berkeley.edu /news/berkeleyan/1994/1130/ames.html (689 words)

	Ames Test (Site not responding. Last check: 2007-11-06)
		The use of the Ames test is based on the assumption that any substance that is mutagenic (for the bacteria used in his test) may also turn out to be a carcinogen; that is, to cause cancer.
		The bacterium used in the test is a strain of Salmonella typhimurium that caries a defective (mutant) gene making it unable to synthesize the amino acid histidine (His) from the ingredients in its culture medium.
		Rapid in vitro tests modeled on the Ames test have been adapted for some eukaryotic cells such as yeast and mammalian cells grown in culture.
	users.rcn.com /jkimball.ma.ultranet/BiologyPages/A/AmesTest.html (551 words)

	Re: What sort of tests are available to test carcinogenicity?
		Developed by Bruce Ames in the 1970s, this test is actually a test of the ability of compounds to act as mutagens, which are also largely thought to function as carcinogens (although not all carcinogens are necessarily mutagens).
		Ames used strains of Salmonella enterica (which was known as S. typhimurium in the 70s) for the original test.
		Ames BN and McCann J (1976) Detection of carcinogens as mutagens in the Salmonella/ microsome test: Assay of 300 chemicals: Discussion.
	www.madsci.org /posts/archives/2004-09/1095889643.Bc.r.html (943 words)

	Ames mutagenicity test (Site not responding. Last check: 2007-11-06)
		The Ames test employs several strains of Salmonella typhimurium which have been selected based on their sensitivity to mutation.
		The test substance (liquid) or an extract of the test substance and the test organism are mixed together in a soft agar solution.
		Ames mutagenicity test (salmonella reverse mutation assay) Tests
	www.nelsonlabs.com /biocompatibility/ames.htm (500 words)

	Ames, Bruce N. definition - Medical Dictionary definitions of popular medical terms
		Ames is perhaps best known for the "Ames test," the test he developed for chemical mutagens.
		The Ames test, which uses a rapid and inexpensive bacterial assay for mutagenicity, complements epidemiologic surveys and animal tests that are necessarily slower, more laborious, and far more expensive.
		Ames began to work on this test in 1964, and after moving to the University of California, Berkeley, as professor of biochemistry in 1967, he continued to improve the sensitivity of the test.
	www.medterms.com /script/main/art.asp?articlekey=26248 (472 words)

	Ames' test (www.whonamedit.com)
		A widely used screening test for the potentially carcinogenic effect of substances — their mutagenic effect on microorganisms, cells- and tissue cultures.
		With this method it is possible to assay directly the mutagenic and teratogenic effect of the substances in tobacco smoke.
		Detection of carcinogens as mutagens in the Salmonella/microsome test: Assay of 300 chemicals.
	www.whonamedit.com /synd.cfm/205.html (253 words)

	Reason magazine -- Bruce Ames Interview
		In the 1970s, Bruce Ames was a hero to environmentalists--the inventor of the Ames Test, which allows scientists to test chemicals to see whether they cause mutations in bacteria and perhaps cancer in humans.
		They are testing enormously high doses--the maximum tolerated dose in the rats or the mice, which means you find the level that causes overt toxic effects and back off just a little bit and feed the animal that amount every day for a lifetime.
		Ames: Among the vitamins you need are a set of antioxidants--vitamin C and vitamin E and beta carotene.
	reason.com /amesint.shtml (4343 words)

	EXPERIMENT 7: Are chemicals, mutations, and cancer linked
		Recently, Ames and some of his colleagues found that chemicals in many "natural" foods (such as broccoli, potatoes, beer, and mushrooms) show just as much potential for carcinogenicity as many of the synthetic chemicals that alarm regulatory agencies and consumers.
		The Ames test is based on the assumption that mutagenicity is associated with carcinogenicity and that mutagenic activity in bacteria is predictive of mutagenic activity in humans.
		The Ames Test measures the ability of a chemical to increase the mutation rate in bacteria.
	profhorn.aos.wisc.edu /wxwise/kti/bacteria/virtualames.html (1147 words)

	US FDA/CFSAN: Introduction to the Template for in vitro Bacterial Reverse Mutation (Ames) Test
		If the molecular structure is not provided with the test, it may be available from a source such as Chemfinder (http://www.chemfinder.com) or ChemIDplus (http://chem.sis.nlm.nih.gov/chemidplus/). The CAS number is the preferred search term if you have it, otherwise try the common name or any synonyms.
		Briefly describe the results of the cytotoxicity (range-finding) test and the basis for the selection of concentrations used in the mutation tests. For example, "in the absence of any cytotoxic effect, the limit dose of 5 mg/plate was used as the upper dose" or "the upper dose was limited by cytotoxicity or solubility".
		Based on results of the first mutation test, test material concentrations of X - Y were chosen for the second mutation test.
	vm.cfsan.fda.gov /~dms/opa-tx03.html (913 words)

	Thermo Electron Corporation --Vitotox Test System
		The test is based on luciferase reporter gene system which activity is measured by light emission and is a function of the genotoxicity of the test compound.
		One of the major benefits over the Ames test is that the entire DNA content of the cell functions as a target for the genotoxin to display its effect.
		An important control for the system is a cytotoxicity test performed together with each sample to ensure that a positive signal in the genotoxicity test is not due to a nonspecific enhancement in luminescence and that a negative response is not due to toxicity of the test compound resulting in cell death.
	www.thermo.com /com/cda/product/detail/1,,12903,00.html (555 words)

	Ames Test
		Directly assaying potential carcinogens by testing for their ability to form tumors in animals is difficult and expensive.
		Several different types of his mutants are used to test for different classes of mutagens -- for example, frameshift mutagens will revert a frameshift mutation in his, etc. The Salmonella his mutants used have three additional properties that make them more sensitive to mutagens.
		Therefore, to test for such pro-mutagens, an extract of rat liver enzymes is included in the reversion assay.
	www.sci.sdsu.edu /~smaloy/MicrobialGenetics/topics/rev-sup/ames.html (586 words)

	Deadly Anthrax Strain Leaves a Muddy Trail
		Understanding the distribution of the Ames strain may be critical to the government's search for those behind the attacks that have killed five people, infected 13 others and disrupted the federal government.
		Those attacks involved the Ames strain, a virulent anthrax bacteria named for the Iowa city where it was originally isolated, according to an Oct. 25 statement from Tom Ridge, the White House director of homeland security.
		A natural or "wild" strain, Ames was recognized relatively early for its virulence and for its ability to resist vaccines.
	www.ph.ucla.edu /epi/bioter/anthraxmuddytrail.html (1403 words)

	Chemical Health & Safety
		Testing of these chemicals was begun in rats, which is reasonable because you don't want workers to be guinea pigs.
		Ames: There is an idea that humanity is just now changing the world, but for eons Earth has been changing, and comets have been hitting our planet and wiping out the dinosaurs.
		Ames: For the government to be effective in cancer prevention, it should be putting money into figuring out how to get people, especially the poor, to eat good diets and stop smoking.
	pubs.acs.org /hotartcl/chas/96/julaug/ames/ames.html (4045 words)

	[No title]
		Of the several short-term tests that have recently been proposed for detecting the mutagenic/ carcinogenic potential of chemicals, the one developed by Professor Bruce N_ Ames appears to be the most reliable, and consequently has gained world- wide acceotance.
		Thus, we developed the capabiiity of conducting the Ames test on SMOKe condensates in a quantitative manner, and decided to measure the mutaqenicities of condensates from several series of experimental cioarettes (Janus serips) produced by B.-A.T., Southampton.
		H ever, on the basis of the Ames test, the following conclusions way be drawn: (a) Application of casing appears to lower mutagenicity, but the differences obtained, although significant, are small indeed.
	www.library.ucsf.edu /tobacco/batco/OCR/6800/6843.txt (1675 words)

	Linus Pauling Institute Cancer Chemoprotection Core Laboratory
		The Salmonella mutagenicity test, or bacterial reverse mutation assay, is also commonly known as the Ames test.
		It was developed by Dr. Bruce Ames, the recipient of 2001 LPI Prize for Health Research, and his colleagues in UC Berkeley in the 70’s.
		The principle of the test is to expose histidine-dependent Salmonella typhimurium strains (the tester strains, which have artificially induced point mutations) to a compound to be examined in a histidine (His) deficient medium.
	lpi.oregonstate.edu /CCP (861 words)

	The Ames Test. In the Pipeline:
		One hears a lot about the Ames test (as a measure of carcinogenicity and other Bad Things.) It's sometimes held up by animal-rights types as a model of the sort of testing that could be done if, presumably, we weren't all so much into torturing the lesser species.
		There are a number of different ways to run the test, but they all come down to this: you expose your bacteria to the test substance, and try to grow them without their required histidine.
		Your test compound either caused the damage that had to be repaired, or it caused the replication process to fumble.
	www.corante.com /pipeline/archives/2002/07/29/the_ames_test.php (900 words)

	Deviation from Additivity in Mixture Toxicity: Relevance of Nonlinear Dose-Response Relationships and Cell Line ... (Site not responding. Last check: 2007-11-06)
		Benzo[a]pyrene, benz[a]anthracene, and dibenz[a,c]anthracene were tested at the LOEL, separately and in combination, for the induction of revertants in the Ames test, using Salmonella typhimurium TA100 and rat liver S9 fraction.
		For the testing of a putative supra-additive or subadditive effect of the combination treatment, the data were evaluated with an n factor analysis of variance with interaction, n being the number of agents tested in combination.
		In view of the results with the mouse lymphoma cells, the question was whether the observed supra-additivity for the induction of micronuclei by ionizing radiation and an ethylating agent was a general phenomenon or whether it was specific for a mouse cell line that harbors a mutation in the p53 tumor suppressor gene (11).
	www.ehponline.org /members/2002/suppl-6/915-918lutz/lutz-full.html (4205 words)

	Lab 7: Ames test
		First developed by Dr. Bruce Ames in 1971, the Ames test is a widely used technique for screening potential carcinogens by testing for mutagenesis of bacteria.
		The major differences from the standard Ames test protocol will be that a single type of auxotrophic mutant strain will be used, the strain will not be optimized for mutagenesis by multiple mutations, and that the compounds used will not be treated with liver extracts.
		McCann, J. and Ames, B.N. Detection of carcinogens as mutagens in the
	www.sfu.ca /biology/courses/bisc302/lab7handout.htm (800 words)

	AMES Test Drive (Site not responding. Last check: 2007-11-06)
		AMES claims are not readily accepted as hard savings or defensible savings.
		AMES is based upon improvements in Aircraft availability, check yield, costs reductions and risks management.
		Trial installations can be supported onsite or by telephone and email, and we can have you installed, setup, and running within 10 business days.
	www.omegaair.com /testdrive.html (202 words)

	Recombinant CYP2E1 Ames mutagenicity test
		In a standard Ames assay a rat liver homogenate is used to provide the cytochromes P450 necessary for activation of mutagens to their reactive forms.
		The resulting test system shows greater sensitivity to these substances than does a standard Ames assay which uses a rat liver homogenate for activation.
		Assay of 855 test chemicals in ten tester strains using a new modification of the Ames test for bacterial mutagens.
	www.uky.edu /Pharmacy/ps/porter/2E1.html (535 words)

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