@article {1229, title = {Hydroxytrimethylarsonium iodide, [Me3AsOH]I}, journal = {Applied Organometallic Chemistry}, volume = {19}, number = {3}, year = {2005}, note = {ISI Document Delivery No.: 912OSTimes Cited: 0Cited Reference Count: 7}, month = {Mar}, pages = {384-385}, type = {Article}, abstract = {Hydroxytrimethylarsonium iodide, [Me3AsOH]I, was obtained from the reaction of Me2AsI and MeI in strong basic aqueous solution. The arsenic atom, lying on a mirror plane, is surrounded by one OH and three Me groups, forming a tetrahedral centre. Copyright (c) 2005 John Wiley \& Sons, Ltd.}, keywords = {arsenic, crystal structure, Mayer reaction, OXIDE, TRIMETHYLARSINE, trimethylhydroxyarsonium iodide}, isbn = {0268-2605}, url = {://000228089400018}, author = {Patrick, B. O. and Sun, H. S. and Fricke, M. W. and Cullen, W. R.} } @article {663, title = {Arsenic methylation by micro-organisms isolated from sheepskin bedding materials}, journal = {Human \& Experimental Toxicology}, volume = {22}, number = {6}, year = {2003}, note = {ISI Document Delivery No.: 696NKTimes Cited: 6Cited Reference Count: 48}, month = {Jun}, pages = {325-334}, type = {Article}, abstract = {Sudden infant death syndrome (SIDS) has been associated with the volatilization of arsenic, antimony or phosphorus compounds from infants{\textquoteright} bedding material by micro-organisms, the so-called {\textquoteright}toxic gas hypothesis{\textquoteright}. The volatilization of arsenic by aerobic micro-organisms isolated from new sheepskin bedding material, as well as on material used by a healthy infant and by an infant who perished of SIDS, was examined. Three fungi were isolated from a piece of sheepskin bedding material on which an infant perished of SIDS, which methylated arsenic to form trimethylarsenic(V) species, precursors to volatile trimethylarsine. These three fungi were identified as Scopulariopsis koningii, Fomitopsis pinicola and Penicillium gladioli by their 26S-ribosomal RNA polymerase chain reaction products. These fungi were not previously known to methylate arsenic. The volatilization of arsenic by these three fungi was then examined. Only R gladioli volatilized arsenic and only under conditions such that the production of sufficient trimethylarsine to be acutely toxic to an infant is unlikely. S. brevicaulis grew on the sheepskin bedding material and evolved a trace amount of trimethylarsine. Known human pathogens such as Mycobacterium neoaurum and Acinetobacter junii were isolated from used bedding.}, keywords = {ANTIMONY COMPOUNDS, arsenic, BIOMETHYLATION, COT MATTRESSES, fungi, GAS, hypothesis, IDENTIFICATION, INFANT-DEATH-SYNDROME, METHYLATION, SCOPULARIOPSIS-BREVICAULIS, SPECIATION, sudden infant death syndrome, toxic gas, TRIMETHYLARSINE, VOLATILIZATION}, isbn = {0960-3271}, url = {://000183892800008}, author = {Lehr, C. R. and Polishchuk, E. and Delisle, M. C. and Franz, C. and Cullen, W. R.} } @article {4718, title = {Antimony biomethylation by Scopulariopsis brevicaulis: characterization of intermediates and the methyl donor}, journal = {Chemosphere}, volume = {41}, number = {11}, year = {2000}, note = {ISI Document Delivery No.: 345WVTimes Cited: 15Cited Reference Count: 23}, month = {Dec}, pages = {1717-1725}, type = {Article}, abstract = {The filamentous fungus Scopulauiopsis brevicaulis biomethylates inorganic antimony(III) compounds to trimethylstibine, that can be detected in culture headspace gases. Dimethylantimony and trimethylantimony species have been detected in the medium of these cultures, but the origin of these species was controversial. We now show that the dimethylantimony species is a true intermediate on the pathway to trimethylstibine (rather than arising from trimethylstibine oxidation or as an analytical artifact) because no dimethylantimony species are formed on trimethylstibine oxidation, as determined by using HG-GC-AAS. Furthermore, the dimethylantimony and trimethylantimony species can be separated, by using anion exchange chromatography, and so the dimethylantimony species is not an analytical artifact, formed during the hydride generation process. The antimony biomethylation mechanism was further probed by measuring incorporation of the methyl group, from (CD3)-C-13-L-methionine and CD3-D-methionine, into methylantimony species and, for comparison, into methylarsenic species. The percentage incorporation of the labeled methyl group into methylarsenic and methylantimony species was not significantly different. The incorporation from (CD3)-C-13-L-methionine was 54\% and 47\% for antimony and arsenic, respectively. The incorporation from CD3-D-methionine was 20\% and 16\% for antimony and arsenic, respectively. It appears that the biomethylation of arsenic and antimony occur by very similar, perhaps identical, mechanisms. (C) 2000 Elsevier Science Ltd. All rights reserved.}, keywords = {APIOTRICHUM-HUMICOLA, arsenic, dimethylantimony, GENERATION, GROWTH, INFANT-DEATH-SYNDROME, INORGANIC ANTIMONY, METHIONINE, RELEVANCE, Scopulariopsis brevicaulis, SPECIATION, trimethylantimony, TRIMETHYLARSINE, trimethylstibine, trimethylstibine oxidation}, isbn = {0045-6535}, url = {://000088838900002}, author = {Andrewes, P. and Cullen, W. R. and Polishchuk, E.} } @article {4720, title = {Interaction of Scopulariopsis brevicaulis, and other microorganisms, with 10,10 {\textquoteright}-oxybisphenoxarsine (OBPA)}, journal = {Applied Organometallic Chemistry}, volume = {14}, number = {7}, year = {2000}, note = {ISI Document Delivery No.: 331GVTimes Cited: 0Cited Reference Count: 13}, month = {Jul}, pages = {364-370}, type = {Article}, abstract = {The fungicide 10,10{\textquoteright}-oxybisphenoxarsine (OBPA) is widely used in consumer products, such as shower curtains, wall coverings and carpets, A possibility exists that microorganisms might be able to degrade OBPA to produce volatile trimethylarsine, If this did occur, then in certain situations enough trimethylarsine might be produced to be a hazard, In this study, we cultured microorganisms in medium containing OBPA, and examined the medium for possible degradation products, We used Scopulariopsis brevicaulis in one experiment, because this microorganism is known for its ability to biomethylate arsenic, OBPA-tolerant microorganisms, isolated from a soil contaminated with arylarsenic compounds, were used in a second series of experiments, We found no evidence of complete microbiological cleavage of aryl-arsenic bonds in any of the cultures, and no significant amount of trimethylarsine was detected in the headspace of S. brevicaulis cultures, Copyright (C) 2000 John Wiley \& Sons, Ltd.}, keywords = {10, 10 {\textquoteright}-oxybisphenoxarsine, arsenic, cyanodiphenylarsine, HUMICOLA, OBPA, Scopulariopsis brevicaulis, SIDS, SPECIATION, TRIMETHYLARSINE}, isbn = {0268-2605}, url = {://000088010700005}, author = {Andrewes, P. and Cullen, W. R. and Wang, C. Q. and Polishchuk, E. and Liao, T.} } @article {3002, title = {IDENTIFICATION OF EXTRACELLULAR ARSENICAL METABOLITES IN THE GROWTH-MEDIUM OF THE MICROORGANISMS APIOTRICHUM-HUMICOLA AND SCOPULARIOPSIS-BREVICAULIS}, journal = {Applied Organometallic Chemistry}, volume = {8}, number = {4}, year = {1994}, note = {ISI Document Delivery No.: PD643Times Cited: 34Cited Reference Count: 28}, month = {Jul}, pages = {303-311}, type = {Article}, abstract = {The separation and identification of some of the arsenic species produced in cells present in the growth medium when the microorganisms Apiotrichum humicola (previously known as Candida humicola) and Scopulariopsis brevicaulis were grown in the presence of arsenicals were achieved by using hydride generation-gas chromatography-atomic absorption spectrometry methodology (HG GC AA). Arsenite, monomethylarsonate, dimethylarsinate and trimethylarsine oxide were detected following incubation with arsenate. With arsenite as a substrate, the metabolites were monomethylarsonate, dimethylarsinate and trimethylarsine oxide; monomethylarsonate afforded dimethylarsinate and trimethylarsine oxide, and dimethylarsinate afforded trimethylarsine oxide. Trimethylarsine was not detected when the arsenic concentration was 1 ppm.}, keywords = {APIOTRICHUM-HUMICOLA, arsenic, CANDIDA-HUMICOLA, DIMETHYULARSINATE, ENDOCELLULAR, EXTRACELLULAR, GROWTH MEDIUM, HYDRIDE GENERATION GAS CHROMATOGRAPHY ATOMIC ABSORPTION SPECTROMETRY, METHYLARSONATE, METHYLATION, mobility, SCOPULARIOPSIS-BREVICAULIS, TRIMETHYLARSINE, TRIMETHYLARSINE OXIDE}, isbn = {0268-2605}, url = {://A1994PD64300003}, author = {Cullen, W. R. and Li, H. and Hewitt, G. and Reimer, K. J. and Zalunardo, N.} }