102 research outputs found
Draft toxicological profile for JP-5, JP-8, and jet A fuels
No full textA Toxicological Profile for JP-5 and JP-8 was released in 1998. This present edition supersedes any previously released draft or final profile.Chemical manager(s)/author(s): John Risher, Obaid Faroon, ATSDR, Division of Toxicology and Human Health Sciences, Atlanta, GA; Fernando Llados, Lisa Ingerman, Mario Citra, SRC, Inc., North Syracuse, NY
Jet fuels JP-4 and JP-7
No full text"This edition supersedes any previously released draft or final profile."--p. iii.Prepared for the U. S. Department of Health and Human Services, Public Health Service, Agency for Toxic Substances and Disease Registry under contract no. 205-93-0606.Chemical manager(s)/author(s): Obaid Faroon, Diane Mandell, Hernan Navarro.Bibliographical references: p. 105-117.1995205-93-06061105
Toxicological profile for uranium
No full textA Toxicological Profile for Uranium was released in 1999. This present edition supersedes any previously released draft or final profile. Superseded by Toxicological profile for uranium released February 2013.Includes bibliographical references (p. 365-429)."Public comment period ends July 29, 2011"--Cover.May 2011.Chemical manager(s)/author(s): Sam Keith, Obaid Faroon, Nickolette Roney, Franco Scinicariello, Sharon Wilbur, ATSDR, Division of Toxicology and Environmental Medicine, Atlanta, GA; Lisa Ingerman, Fernando Llados, Daneil Plewak, David Wohlers, Gary Diamond, SRC, Inc., North Syracuse, N
Toxicological profile for cadmium
No full textA Toxicological Profile for Cadmium, Draft for Public Comment was released in September 2008. This edition supersedes any previously released draft or final profile.Chemical manager(s)/author(s): Obaid Faroon, Annette Ashizawa, Scott Wright, Pam Tucker,.Kim Jenkins,.ATSDR, Division of Toxicology and Human Health Sciences (proposed), Atlanta, GA; Lisa Ingerman, Catherine Rudisill, SRC Inc. (formerly known as Syracuse Research Corporation), North Syracuse, NY.Includes bibliographical references (p. 351-424) and index
Toxicological profile for uranium
No full text"A Toxicological Profile for Uranium, Draft for Public Comment was released in May 2011. This edition supersedes any previously released draft or final profile." - p iiiChemical manager(s)/author(s): Sam Keith, Obaid Faroon, Nickolette Roney, Franco Scinicariello, Sharon Wilbur, ATSDR, Division of Toxicology and Human Health Sciences, Atlanta, GA; Lisa Ingerman, Fernando Llados, Daneil Plewak, David Wohlers, Gary Diamond, SRC, Inc., North Syracuse, NY.201
Speculations in the book of Abu Elfarg Obaid Allah bin Mohammed Almaraghi
No full text(Tahthib Aljumal by Alzojaji) or (The book of Sentences) by Abi Alfaraj Obaid Ullah Bin Mohammed Almaraghy is one of the first books dealing with sentences of Alzajjaji. Having studied it for thirty years, the author has provided comments, editing, and simplification. The author as well has reordered the sentences of the book, added, deleted, and reordered some chapters on his own way. The study was on a unique script, where we tried to explore the author's character by introducing him, identifying his grammar school. In the second chapter, we shed light on the chapters of the book by showing the arrangement of the material. The third chapter of our study touched upon the author’s attitude towards gram-mar schools, while the fourth chapter dealt with the author’s attitude towards grammarians. We also have added a chapter on evaluating the book, then we ended the study by presenting the results
Toxicological profile for cadmium (update)
No full textprepared by Syracuse Research Corporation under contract no. 200-2004-09793; prepared for U.S. Department of Health and Human Services, Public Health Service, Agency for Toxic Substances and Disease Registry."Chemical manager(s)/author(s): Obaid Faroon, Annette Ashizawa, Scott Wright, Pam Tucker,.Kim Jenkins,.ATSDR, Division of Toxicology and Environmental Medicine, Atlanta, GA; Lisa Ingerman, Catherine Rudisill,.Syracuse Research Corporation, North Syracuse, N." - p. ix"Draft for public comment (update), comment period ends: February 26, 2009"--Cover.Includes bibliographical references (p. 333-448) and index.2008200-2004-097931120
Phenol
No full textprepared by Syracuse Research Corporation ; prepared for U.S. Department of Health and Human Services, Public Health Service, Agency for Toxic Substances and Disease Registry.Chemical manager(s)/author(s): Jewel Crawford, Obaid Faroon, Jewell Wilson,.ATSDR, Division of Toxicology and Environmental Medicine, Atlanta, GA; Fernando T. Llados, Kristina Garber, Sari J. Paikoff, Michael H. Lumpkin, Syracuse Research Corporation, North Syracuse, NY. --P. ix."A toxicological profile for phenol was released in 1998. This edition supersedes any previously released draft or final profile"--P. iii."This toxicological profile is prepared in accordance with guidelines developed by the Agency for Toxic Substances and Disease Registry (ATSDR) and the Environmental Protection Agency (EPA). The original guidelines were published in the Federal Register on April 17, 1987"--P. v.Includes bibliographical references (p. 191-220) and index.20081122
Carbon tetrachloride
No full textPrepared by Syracuse Research Corporation under contract no. 205-1999-00024 ; prepared for U.S. Department of Health and Human Services, Public Health Service, Agency for Toxic Substances and Disease Registry.Chemical manager(s)/author(s): Obaid Faroon,.Jessilynn Taylor, Nickolette Roney, ATSDR, Division of Toxicology, Atlanta, GA; Margaret E. Fransen,.Suzanne Bogaczyk,.Gary Diamond,.Syracuse Research Corporation, Syracuse, NY --P. ix."A toxicological profile for carbon tetrachloride, draft for public comment was released in September 2003. This edition supersedes any previously released draft or final profile"--P. iii."This toxicological profile is prepared in accordance with guidelines developed by the Agency for Toxic Substances and Disease Registry (ATSDR) and the Environmental Protection Agency (EPA). The original guidelines were published in the Federal Register on April 17, 1987"--P. v.Includes bibliographical references (p. 213-301) and index.205-1999-0002
Synthesis of functional stimulus responsive oligovinyl ethers and towards highly branched polymers using ab initio cationic polymerisation.
No full textOligo(vinyl ethers) with functionalised end groups were produced through the alkylation of silyl enol ethers in ab initio cationic polymerisations. In order to obtain high degrees of chain end functionality a great deal of care was taken in choosing the monomer concentration, the reaction temperature, Lewis acids and the concentration of silyl enol ether. The experiment also required the use of highly nucleophilic species such as silyl ketene acetal, which react with carbocations at similar rates to vinyl ethers. Rapid elimination of the primary adduct produced the ester end-groups. MALDI-TOF mass spectrometry was used to analyse the oligomers obtained and to assess the side reactions and chain end functionalisation processes.
Oligo(methyl vinyl ether)s were synthesised in cationic polymerisations using the HCl-isobutyl vinyl ether/SnCl4 initiating system within the polymerisation temperature range -26 °C to -78 °C, and in the absence of an end-capping agent. It was observed that the use of a lower temperature yielded well-defined oligomers. Furthermore, during the polymerisation the silyl enol ether reactivity suppressed the termination rate and oligomethyl vinyl ether with increased levels of ester end groups were then produced. In addition, a size exclusion chromatograph was calibrated using MALDI-TOF MS to obtain molecular weights of narrow fractions (SEC-MALDI TOF). The Kuhn-Mark-Houwink relation for oligo(methyl vinyl ether) was then established. In the light of the above, it was possible to infer that the solution coil conformation is dependent on the end group structure.
Oligo(isobutyl vinyl ethers) were also prepared successfully at different temperatures (-26 and -78 °C) in the presence of a silyl enol ether using HCl-iBVE/TiCl4 as the initiating system. At a lower temperature, and with a high concentration of silyl enol ether, the normal termination reactions were suppressed and oligo(isobutyl vinyl ethers) with a high ester group chain end functionality were produced. This phenomenon can be attributed to the fact that, at lower reaction temperatures, the rate of propagation relative to the rate of termination and the control of polymerisation was observed.
Another means by which oligo(isobutyl vinyl ethers) were prepared in this experiment with ester end groups was by using continuous reaction processes. These processes are commonly applied in many industrial applications as they allow for the production of large quantities of polymer in a short period of time. These particular polymerisations were applied by using HCl-iBVE as an initiating system with SnCl4 and TiCl4 as Lewis acids at -15 °C. The production of oligomers with a high degree of ester group functionality was carried out by the use of SnCl4 with a high concentration of silyl enol ether at a slow flow rate.
It was also possible to produce highly branched functional polymers by using continuous processes. In this instance, isobutyl vinyl ether was used as a first monomer with diethyl divinyl ether (DEDVE) and divinyl benzene (DVBz) being used as second monomers in the presence of silyl enol ether at a temperature of -15 °C. Many different Lewis acids were used in these polymerisation reactions It was observed that the polymerisation of iBVE with DEDVE was only successful by using Sc(OTf)3 as a Lewis acid. Highly branched polymers with ester group functionality were detected at a monomer ratio of 9:1 with a low concentration of silyl enol ether at a high feed rate. In the polymerisation of iBVE with DVBz, only two Lewis acids successfully aided these reactions (ZnI2/HI and Sc(OTf)3). In ZnI2/HI, a low concentration of silyl enol ether with a high flow time was found to form highly branched polymers with the chain end group. In using Sc(OTf)3, a high concentration of SEE with a low feed rate was shown to produce highly branched functional polymers. By analysing the aforementioned information it was possible to deduce that the feed rate and the concentration of silyl enol ether had a substantial effect on the chain end attained
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