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Murugesan B, Sivakumar A, Loganathan A, Sivakumar P. Synthesis and photocatalytic studies of lanthanum oxide doped nano carbon hollow spheres. J Taiwan Inst Chem Eng 2017. [DOI: 10.1016/j.jtice.2016.11.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Chi Y, Geng W, Zhao L, Yan X, Yuan Q, Li N, Li X. Comprehensive study of mesoporous carbon functionalized with carboxylate groups and magnetic nanoparticles as a promising adsorbent. J Colloid Interface Sci 2012; 369:366-72. [DOI: 10.1016/j.jcis.2011.12.051] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2011] [Revised: 11/30/2011] [Accepted: 12/19/2011] [Indexed: 11/26/2022]
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Wang Y, Wang G, Wang H, Liang C, Cai W, Zhang L. Chemical-Template Synthesis of Micro/Nanoscale Magnesium Silicate Hollow Spheres for Waste-Water Treatment. Chemistry 2010; 16:3497-503. [DOI: 10.1002/chem.200902799] [Citation(s) in RCA: 206] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Zhai Y, Dou Y, Liu X, Tu B, Zhao D. One-pot synthesis of magnetically separable ordered mesoporous carbon. ACTA ACUST UNITED AC 2009. [DOI: 10.1039/b821945a] [Citation(s) in RCA: 129] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Whong WZ, Stewart J, McCawley M, Major P, Merchant JA, Ong TM. Mutagenicity of airborne particles from a nonindustrial town. ACTA ACUST UNITED AC 2006. [DOI: 10.1002/em.2860030604] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Claxton LD, Warren S, Zweidinger R, Creason J. A comparative assessment of Boise, Idaho, ambient air fine particle samples using the plate and microsuspension Salmonella mutagenicity assays. THE SCIENCE OF THE TOTAL ENVIRONMENT 2001; 275:95-108. [PMID: 11482407 DOI: 10.1016/s0048-9697(00)00857-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The primary objective of this study is to characterize the genotoxic potential of the ambient air aerosols collected within an air shed impacted primarily by wood smoke and automotive emissions. The study also examines the relative merits of a microsuspension assay and the standard plate assay for monitoring the presence of airborne particle-bound mutagens. Wintertime ambient air particulate samples collected from Boise, Idaho, USA, were shown to contain extractable organic matter that is mutagenic in the Salmonella typhimurium microsuspension and plate-incorporation assays. Differences in the results from the primary sites, auxiliary sites and the background site demonstrate that the particle-bound mutagens are not evenly distributed within the air shed and are more associated with the location of sampling than with the time of sampling or the type of bioassay used to evaluate the samples. This study also demonstrates that the bioassay protocol used in such studies should depend upon the characteristics of the air shed's mutagens and the purpose of the study. For example, the microsuspension assay gave somewhat more variable results between samples but was approximately threefold more sensitive than the plate assay. When strain TA98 was used in the microsuspension assay, the mutagenic response was greater without an exogenous activation system. The reverse was true for the plate assay in which the use of an exogenous activation system increased the mutagenicity response. TA100 in the microsuspension assay provided results comparable to those with TA98. This is important because TA100 can also be used to bioassay semivolatile and volatile organics associated with ambient air mutagenicity. This, in turn, allows a comparison of the mutagenicity of organics collected by differing methods due to their volatility. Future studies should be directed toward correlation of mutagenicity results with other analytical results in order to further develop methods for better characterization of the genotoxicity of ambient air.
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Affiliation(s)
- L D Claxton
- National Health and Environmental Effects Research Laboratory, US Environmental Protection Agency, Research Triangle Park, NC 27711, USA.
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Fu PP, Von Tungeln LS, Hammons GJ, McMahon G, Wogan G, Flammang TJ, Kadlubar FF. Metabolic activation capacity of neonatal mice in relation to the neonatal mouse tumorigenicity bioassay. Drug Metab Rev 2000; 32:241-66. [PMID: 10774778 DOI: 10.1081/dmr-100100575] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The neonatal mouse tumorigenicity bioassay is a well-developed animal model that has recently been recommended as an alternative tumorigenicity bioassay by the International Conference on Harmonization (ICH) for Technical Requirements for the Registration of Pharmaceuticals for Human Use. There are sufficient data to conclude that this animal model is highly sensitive to genotoxic chemical carcinogens that exert their tumorigenicity through mechanisms involving the formation of covalently bound exogenous DNA adducts that lead to mutation. On the other hand, it is not sensitive to chemical carcinogens that exert tumorigenicity through a secondary mechanism. The metabolizing enzymes present in the neonatal mouse, particularly the cytochromes P450, are critical factors in determining the tumorigenic potency of a chemical tested in this bioassay. However, compared to the metabolizing enzymes of the adult mouse and rat, the study of the metabolizing enzymes in neonatal mouse tissues has been relatively limited.
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Affiliation(s)
- P P Fu
- National Center for Toxicological Research, Jefferson, Arkansas 72079, USA
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Fu PP, Von Tungeln LS, Yi P, Xia Q, Casciano AA, Flammang TJ, Kadlubar FF. Neonatal Mouse Tumorigenicity Bioassay. ACTA ACUST UNITED AC 1998. [DOI: 10.1177/009286159803200311] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Abstract
The first attempts to understand the causes of cancer were based on generalizations of what might now be termed a "holistic" nature, and hereditary influences were recognized at an early stage; these views survive principally through a supposed positive connection between psychological factors such as stress and diminished ability to combat the progressive development of tumors through some form of immunologically mediated rejection of potentially cancerous cells. While evidence for immunosurveillance is generally accepted, it is now widely regarded as almost wholly confined to instances where tumor viruses are involved as causative agents. The earliest theorists drew an analogy between the processes of carcinogenesis and of evolution; the cancer cells acquired the ability to outstrip their normal counterparts in their capacity for proliferation. This was even before evolution had been interpreted as involving a continuous succession of mutations. Evidence was already to hand before the end of the 18th century that exogenous agents, notably soot, a product of the "industrial revolution," could cause skin cancer. Somewhat over 100 years later, another industrial innovation, the manufacture of synthetic dyestuffs, implicated specific chemical compounds that could act systemically to cause bladder cancer. Meanwhile, the 19th century saw the establishment of the fundamentals of modern medical science; of particular relevance to cancer was the demonstration that it involved abnormalities in the process of cell division. The commencement of the 20th century was marked by a rediscovery of the concept of mutation; and it was proposed that cancer originated through uncontrolled division of somatically mutated cells. At around this time, two further important exogenous causative agents were discovered: X-rays and tumor viruses. In the late 1920s, x-radiation became the first established exogenous cause of mutagenesis. The discoverer of this phenomenon, H. J. Muller, suggested that while mutation in a single cell was the primary causative mechanism in carcinogenesis, its generally observed logarithmic increase in incidence with age reflected a "multihit" process, and that multiple successive mutations were required in the progeny of the original mutants. He also recognized that the rate of proliferation of potentially cancerous cells would markedly influence the probability of their subsequent mutation. These considerations are essentially the foundation of the generally accepted view of carcinogenesis that now seems unlikely to be superseded. However, this acceptance did not come about unopposed. The analogy between carcinogenesis and evolution was disliked by many biologists because it embodied the concept that cancer was an inevitable consequence of our evolutionary origins.(ABSTRACT TRUNCATED AT 400 WORDS)
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Affiliation(s)
- P D Lawley
- Section of Molecular Carcinogenesis, Institute of Cancer Research, Haddow Laboratories, Sutton, Surrey, United Kingdom
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Barale R, Giromini L, Ghelardini G, Scapoli C, Loprieno N, Pala M, Valerio F, Barrai I. Correlations between 15 polycyclic aromatic hydrocarbons (PAH) and the mutagenicity of the total PAH fraction in ambient air particles in La Spezia (Italy). Mutat Res 1991; 249:227-41. [PMID: 2067536 DOI: 10.1016/0027-5107(91)90150-m] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Airborne particulate matter has been monitored 4 times a month for 1 year (1988) in the city of La Spezia (Italy). The polycyclic aromatic hydrocarbon (PAH) fractions were extracted, purified and characterized for the content of 15 individual PAH. In general when concentrations of individual PAH were compared statistical correlation was obtained. Mutagenicity studies were performed by the use of the Ames plate test with the Salmonella strains TA98, TA100, TA98NR and TA98DNP6 with and without metabolic activation (S9 mix). The TA98 strain was by far the most responsive and the S9 mix was absolutely required as expected when PAH are assayed. Besides mutagenicity, toxicity was also considered and it proved to be correlated with mutagenicity in TA98, +S9. The TA98NR and TA98DNP6 strains showed no appreciable differences from the parental strain TA98 indicating the absence of significant amounts of direct-acting nitro derivatives in our PAH samples. Of the 15 PAH considered in this study the amounts of cyclopental[c,d]pyrene (CPP) correlated best with mutagenicity. The role of CPP in contributing to the indirect mutagenicity of urban air PAH samples is discussed.
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Affiliation(s)
- R Barale
- Istituto di Zoologia, Università di Ferrara, Italy
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Athanasiou K, Arzimanoglou I, Piccoli C, Yamasaki H, Arzimanoglou II. Mutagenicity, sister chromatid exchange inducibility and in vitro cell transforming ability of particulates from Athens air. Cell Biol Toxicol 1987; 3:251-61. [PMID: 3333731 DOI: 10.1007/bf00117863] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Airborne particulates were collected over a period of twelve months by the use of Hi-Vol samplers in the basin of Athens, Greece. N-Hexane extracts were tested in a battery of in vitro tests for their ability to induce mutation in bacteria as well as mutation, sister chromatid exchange and morphological transformation in cultured mammalian cells. Positive results were found for mutagenicity with Salmonella strain TA98 in the Ames assay, for sister chromatid exchange induction in CHO cells and for transformation in BALB/c 3T3 cells in culture. They also showed weak non-dose-related induction of ouabain resistance in BALB/c 3T3 cells. The contribution of oxidizing and nitrating agents found in the Athens atmosphere, together with sunlight UV irradiation in the formation of direct acting mutagens and potential carcinogens from ambient polycyclic aromatic hydrocarbons, is suggested.
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Affiliation(s)
- K Athanasiou
- National Hellenic Research Foundation, Biological Research Center, Athens, Greece
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Sasaki Y, Kawai T, Ohyama K, Nakama A, Endo R. Carcinogenicity of extract of airborne particles using newborn mice and comparative study of carcinogenic and mutagenic effect of the extract. ARCHIVES OF ENVIRONMENTAL HEALTH 1987; 42:14-8. [PMID: 3566345 DOI: 10.1080/00039896.1987.9935789] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
An organic extract of airborne particles collected in Tokyo and its fractions (neutral, acidic, and basic) were investigated in Ames Salmonella assays for mutagenicity and in newborn mice for carcinogenicity. Mutagenicity to TA100 and TA98 strains was detected in the whole extract, the neutral, the acidic and the basic fractions with and without metabolic activation. In the carcinogenicity test, the incidence of lung tumor was as follows: whole extract, 4/25; neutral fraction, 7/25; acidic fraction, 0/20; basic fraction, 1/11; vehicle, 2/39; and uninjected, 3/47. The neutral fraction of the extract of the airborne particles showed highly potent mutagenicity and a high incidence of lung tumors in mice.
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Garner RC, Stanton CA, Martin CN, Chow FL, Thomas W, Hubner D, Herrmann R. Bacterial mutagenicity and chemical analysis of polycyclic aromatic hydrocarbons and some nitro derivatives in environmental samples collected in West Germany. ENVIRONMENTAL MUTAGENESIS 1986; 8:109-17. [PMID: 3510859 DOI: 10.1002/em.2860080110] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Snow and air particulate samples collected in Upper Frankonia, Federal Republic of Germany, have been analyzed for nitro-polycyclic aromatic hydrocarbons (PAH) and PAH content. A novel clean-up technique has been developed enabling interfering organochlorine environmental contaminants to be removed prior to analysis of the hydrocarbons by GC-MS. Mass fragmentation patterns are presented for 1-nitropyrene, 6-nitrobenzo(a)pyrene, 6-nitrochrysene, and 3-nitrofluoranthene. The level of these compounds found in air samples was in the range of 0.2-2.0 ng.m-3 with the exception of 6-nitrobenzo(a)pyrene, which was not detected. This compares with PAH values of between 1 and 6 ng.m-3. The freshly fallen snow sample collected at the side of a motorway had no detectable PAHs or nitro-PAHs. Parallel studies on the bacterial mutagenicity of the collected air samples using Salmonella typhimurium TA98 and TA100 in the presence and absence of aroclor-induced rat liver "S9" revealed both "direct" and "indirect" activity. Larger numbers of mutants were induced in the presence of S9 than in its absence. The snow sample was devoid of mutagenic activity. These studies show the utility of the biological approach to screen environmental samples prior to expensive and time-consuming chemical analysis.
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Murray RW, Banavali R. Formation of a K-region arene oxide by intramolecular 0 atom transfer. Tetrahedron Lett 1983. [DOI: 10.1016/s0040-4039(00)81916-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Mukhtar H, Link CM, Cherniack E, Kushner DM, Bickers DR. Effect of topical application of defined constituents of coal tar on skin and liver aryl hydrocarbon hydroxylase and 7-ethoxycoumarin deethylase activities. Toxicol Appl Pharmacol 1982; 64:541-9. [PMID: 6982545 DOI: 10.1016/0041-008x(82)90251-4] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Braun AG, Nichinson BB, Horowicz PB. Inhibition of tumor cell attachment to concanavalin A-coated surfaces as an assay for teratogenic agents: approaches to validation. TERATOGENESIS, CARCINOGENESIS, AND MUTAGENESIS 1982; 2:343-54. [PMID: 6130634 DOI: 10.1002/1520-6866(1990)2:3/4<343::aid-tcm1770020316>3.0.co;2-s] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Four environmental agents have been tested for activity in a recently developed in vitro teratogen assay system. All four agents inhibited attachment. The agents were 40-fold concentrated drinking water (ID50 = 0.45 ml/ml), whole cigarette smoke condensate (ID50 = 85 micrograms/ml), kerosene soot (ID50 = 90 micrograms/ml), and commercial formulations of the pesticide carbaryl (ID50 approximately 150 micrograms/ml). On the basis of these examples appropriate criteria for the validation of in vitro teratogen assay systems are discussed. It is concluded that criteria are critically dependent on the specific applications of the assay system. For example, the false-positive rate must be minimized to make a wide-ranging screen of water samples useful. On the other hand, an investigation of impurities in commercial compounds requires low false-negative rates. In every case a quantitative measure of the potential teratogenic potency, in vivo, is desirable.
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Pitts JN, Lokensgard DM, Ripley PS, VAN Cauwenberghe KA, VAN Vaeck L, Shaffer SD, Thill AJ, Belser WL. "Atmospheric" Epoxidation of Benzo[a]pyrene by Ozone: Formation of the Metabolite Benzo[a]pyrene-4,5-Oxide. Science 1980; 210:1347-9. [PMID: 17817846 DOI: 10.1126/science.210.4476.1347] [Citation(s) in RCA: 135] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Benzo[a]pyrene deposited on a glass fiber filter reacts rapidly in the dark or light with ambient levels of ozone to yield a mixture of products that display strong direct mutagenicity in the Ames assay. The major stable contributor to this activity has been identified as benzo[a]pyrene-4,5-oxide, a DNA-binding metabolite in biological systems, known to be a strong direct mutagen with Salmonella typhimurium strain TA98.
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Preidecker BL. I. Bacterial mutagenicity of particulates from Houston air. ENVIRONMENTAL MUTAGENESIS 1980; 2:75-83. [PMID: 7035159 DOI: 10.1002/em.2860020111] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
This study was designed to examine suspended air particulates from the Houston atmosphere, Airborne particulates were collected using either a hi-vol sampler (one stage from 0.01 to 25 micrometer) or an Anderson Cascade Impactor, the five stages of which roughly resemble the human respiratory tract. After organic extraction, the Ames assay was used to determine the mutagenic content of extracts, and the ability to induce prophage was assessed. Also DNA-repair-deficient cells were employed to see if the extracts caused DNA damage and what portion of the premutational lesions was repaired in normal cells. Results indicate that extracts of particulates from Houston air cause a significant number of mutations in bacteria and that the highest frequency of reversions is associated with the smallest particulates. An excision repair system is operative in bacteria which is able to assuage damage done to DNA by these extracts. The extracts did not cause prophage induction.
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Pitts JN, Van Cauwenberghe KA, Grosjean D, Schmid JP, Fitz DR, Belser WL, Knudson GP, Hynds PM. Atmospheric reactions of polycyclic aromatic hydrocarbons: facile formation of mutagenic nitro derivatives. Science 1978; 202:515-9. [PMID: 705341 DOI: 10.1126/science.705341] [Citation(s) in RCA: 565] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Directly active mutagens are formed on exposure of the promutagen benzo[a]pyrene to gaseous pollutants in smog. In simulated atmospheres containing 1 part per million nitrogen dioxide and traces of nitric acid, directly mutagenic nitro derivatives are readily formed from both benzo[a]pyrene and perylene, a non-mutagen in the Ames reversion assay. Possible formation of direct mutagens by such reactions on sample collection filters, in exhaust effluents, and in the atmosphere should be recognized.
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Winkelstein W, Gay ML. Suspended particulate air pollution. Relationship to mortality from cirrhosis of the liver. ARCHIVES OF ENVIRONMENTAL HEALTH 1971; 22:174-7. [PMID: 5101284 DOI: 10.1080/00039896.1971.10665829] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Roe FJ, Grant GA. Inhibition by germ-free status of development of liver and lung tumours in mice exposed neonatally to 7,12-dimethylbenz(a)anthracene: implications in relation to tests for carcinogenicity. Int J Cancer 1970; 6:133-44. [PMID: 5469143 DOI: 10.1002/ijc.2910060117] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Epstein SS, Fujii K, Andrea J, Mantel N. Carcinogenicity testing of selected food additives by parenteral administration to infant Swiss mice. Toxicol Appl Pharmacol 1970; 16:321-34. [PMID: 4314162 DOI: 10.1016/0041-008x(70)90004-9] [Citation(s) in RCA: 42] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Epstein SS, Mantel N. Hepatocarcinogenicity of the herbicide maleic hydrazide following parenteral administration to infant Swiss mice. Int J Cancer 1968; 3:325-35. [PMID: 4300716 DOI: 10.1002/ijc.2910030302] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Epstein SS, Andrea J, Clapp P, Mackintosh D. Enhancement by piperonyl butoxide of acute toxicity due to Freons, benzo[alpha]pyrene, and griseofulvin in infant mice. Toxicol Appl Pharmacol 1967; 11:442-8. [PMID: 5586357 DOI: 10.1016/0041-008x(67)90045-2] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Epstein SS, Joshi S, Andrea J, Clapp P, Flak H, Mantel N. Synergistic toxicity and carcinogenicity of 'freons' and piperonyl butoxide. Nature 1967; 214:526-8. [PMID: 4291781 DOI: 10.1038/214526a0] [Citation(s) in RCA: 53] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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