Benzene

Source: www.moreover.com --- 11 days ago
Claims that Apple's Mac Pros emit Benzene are being denied by the company. A French newspaper called of a study by a researcher at France's INERIS claiming that odors stemming from certain Mac Pros are the result of Benzene emissions. ...

Source: www.moreover.com --- 19 days ago
Inventors: ESTEVE, Emilien Louis Joseph; 20 Rue Francois Stroobant, B-1050 Bruxelles (BE). VAN GOMPEL, Bruno; Wellingstraat 691a, B-9070 Heusden-destelbergen (BE). Applicant: THE COCA-COLA COMPANY [US/US]; One Coca-cola Plaza, Nw, Atlanta, GA 30313 ...

Source: www.ncbi.nlm.nih.gov --- 38 days ago
Related Articles [Biodegradation of Benzene series compounds under nitrate reducing conditions] Huan Jing Ke Xue. 2006 Sep;27(9):1846-52 Authors: Dou JF, Liu X A series of batch experiments were performed using mixed bacterial culture to investigate the biodegradability of Benzene, toluene, ethylbenzene and the xylene isomers (BTEX) under denitrifying conditions. The results show that BTEX can be degraded effectively by the mixed bacterial culture. The biodegradation of BTEX could be modeled by the substrate inhibition Monod equation. When the concentrations of BTEX were less than 50 mg x L(-1), the anaerobic degradation rates decreased with toluene > ethylbenzene > m-xylene > o-xylene > p-xylene > Benzene. The ratio between the amount of nitrate consumed and the amount of the Benzene, toluene, ethylbenzene, o-xylene, m-xylene, p-xylene degraded was 9.47, 9.26, 11.14, 12.46, 13.36 and 13.02, respectively. The electron acceptor needed in the initial anaerobic degradation of BTEX was nitrate, and then both nitrate and nitrite could be served as the electron acceptors for the further degradation of the intermediates of BTEX. PMID: 17117643 [PubMed - indexed for MEDLINE] ...

Source: www.ncbi.nlm.nih.gov --- 24 days ago
Related Articles Isolation and characterization of Alicycliphilus denitrificans strain BC that grows on Benzene with chlorate as electron acceptor. Appl Environ Microbiol. 2008 Sep 12; Authors: Weelink SA, Tan NC, Ten Broeke H, van den Kieboom C, van Doesburg W, Langenhoff AA, Gerritse J, Junca H, Stams AJ A bacterium, strain BC, was isolated from a Benzene-degrading chlorate-reducing enrichment culture. Strain BC degrades Benzene in conjunction with chlorate reduction. Cells of strain BC were short rods, 0.6 microm wide and 1-2 microm long, motile and stained Gram-negative. Strain BC grew on Benzene and some other aromatic compounds with oxygen, or in the absence of oxygen with chlorate as the electron acceptor. Strain BC is a denitrifying bacterium, but it is not able to grow on Benzene with nitrate. The closest cultured relative was Alicycliphilus denitrificans K601 (type strain), a cyclohexanol-degrading nitrate-reducing Betaproteobacterium. Chlorate reductase (0.4 U/mg protein) and chlorite dismutase (5.7 U/mg protein) activities were determined in cell extracts of strain BC. Gene sequences encoding known chlorite dismutase (cld) were not detected in strain BC by applying the PCR primers reported in previous studies. As physiological and biochemical data indicated oxygenation of Benzene during growth with chlorate, a strategy was developed to detect genes of monooxygenase and dioxygenase enzymes potentially involved in Benzene de ...

Source: www.ncbi.nlm.nih.gov --- 17 days ago
Dependence of Charge-Transport Parameters on Static Correlation and Self-Interaction Energy: The Case of a 1,4-Bis(Phenylethynyl)Benzene Derivative Conjugated Molecule. J Phys Chem A. 2008 Sep 24; Authors: Sancho-García JC, Pérez-Jiménez AJ The current research on molecular-based devices built with highly unsaturated molecules is largely assisted by computational techniques. These modern computational tools are intended to serve (i) to understand the relation between the mechanism of charge transport and the chemical composition of the semiconductors and (ii) to perform the molecular engineering needed to design new and more efficient organic materials. We have studied the case of a rod-shaped conjugated molecule widely used in molecular electronics. The results of multireference perturbation theory up to second order (MRMP2) and complete active space self-consistent field calculations (CASSCF) are compared with the results provided by energy density functionals. Motivated by the diverse accuracy of the results depending on the theoretical method selected, we have systematically studied the physical origin of the discrepancies. We find that a subtle interplay between correlation effects and the self-interaction energy mainly governs the results, which makes it thus difficult to anticipate the quality of a method without knowing in advance its dependence on both effects. We thus encourage careful testing of computational methods for ...

Source: www.ncbi.nlm.nih.gov --- 32 days ago
Related Articles Comparative assessments of Benzene, toluene, and xylene natural attenuation by ouantitative polymerase chain reaction analysis of a catabolic gene, signature metabolites, and compound-specific isotope analysis. Environ Sci Technol. 2008 Aug 15;42(16):6065-72 Authors: Beller HR, Kane SR, Legler TC, McKelvie JR, Lollar BS, Pearson F, Balser L, Mackay DM A controlled-release study conducted at Vandenberg Air Force Base involved the injection of anaerobic groundwater amended with Benzene, toluene, and o-xylene (BToX; 1-3 mg/L each) in two parallel lanes: lane A injectate contained no ethanol, whereas lane B injectate contained approximately 500 mg/L ethanol. As reported previously by Mackay and co-workers, ethanol led to slower BToX disappearance in lane B. Here, we report on assessments of BToX natural attenuation by three independent and specific monitoring approaches: signature metabolites diagnostic of anaerobic TX metabolism (benzysuccinates), compound-specific isotope analysis (CSIA), and quantitative polymerase chain reaction (qPCR) analysis of a catabolic gene involved in anaerobic TX degradation (bssA). In combination, the three monitoring methods provided strong evidence of in situ TX biodegradation in both lanes A and B; however, no single method provided strong evidence for TX biodegradation in both lanes. Benzylsuccinates were detected almost exclusively in lane B, where slower TX degradation and higher resid ...

Source: www.ncbi.nlm.nih.gov --- 30 days ago
Related Articles Polymorphisms in Phase I and Phase II Metabolism Genes and Risk of Chronic Benzene Poisoning in a Chinese Occupational Population. Carcinogenesis. 2008 Sep 10; Authors: Sun P, Shao MH, Xia ZL, Zhang ZB, Wan JX, Wu F, Jin XP, Fan WW, Lu DR, Zhao NQ, Christiani DC It is widely accepted that the cytotoxicity and genotoxicity of Benzene results from the action of reactive metabolites. Therefore, genetic variation in metabolic enzyme genes may contribute to susceptibility to chronic Benzene poisoning (CBP) in the exposed population. Using a case-control study which included 268 Benzene-poisoned patients and 268 workers occupationally exposed to Benzene in South China, we aimed to investigate the association between single-nucleotide polymorphisms (SNPs) in genes with phase I and II of metabolism and risk of CBP. The TaqMan technique was used to detect polymorphisms of CYP1A1, CYP1A2, CYP1B1, ADH1B, EPHX1, EPHX2, NQO1, MPO, GSTP1, and UGT1A6 genes. We also explored potential interactions of these polymorphisms with lifestyle factors such as cigarette smoking and alcohol consumption. A weak positive association was found between GSTP1 rs1695 polymorphism and the risk of CBP (P = 0.046), but this association was not statistically significant (P = 0.117) after adjustment for potential confounders. Further analysis showed that the risk of CBP increased in the subjects with EPHX1 GGAC/GAGT diplotype (P = 0.00057) or AGAC/GAGT dip ...

Source: blogs.zdnet.com --- 11 days ago
Mac Pro owners, listen up. A french newspaper Liberation.fr has published a report (English translation) stating that Mac Pro owners run the risk of getting diseases as dangerous as leukemia (blood cancer) simply by using their computer. The newspaper was warned by a national agency scientist that the smell (already detected by many Mac Pro [...] ...

Source: blogs.zdnet.com --- 12 days ago
Mac Pro owners, listen up. A french newspaper Liberation.fr has published a report (English translation) stating that Mac Pro owners run the risk of getting diseases as dangerous as leukemia (blood cancer) simply by using their computer. The newspaper was warned by a national agency scientist that the smell (already detected by many Mac Pro users on Apple forums) is actually toxic, composed of several toxins, including Benzene. An Apple Core reader requesting anonymity, sends the following details: Here's a proof that the smell problem was previously known, check this page. The real news here is that the smell is toxic... but still no official answer from Apple. I've submitted this piece of news to let english-speaking Mac Pro users... ...

Source: arstechnica.com --- 10 days ago
Apple has investigated a claim from a French researcher that Mac Pros are emitting Benzene and other volatile compounds. So far, the company has found no evidence to support the claim. Read More... ...

Source: www.macworld.com --- 11 days ago
Apple says it has not seen any evidence to back up a French newspaper’s claim that Mac Pros are emitting toxic odors, including Benzene. ...

Source: www.sciam.com --- 9 days ago
Apple is investigating a complaint that its pre-2008 Mac Pros emit fumes from the chemical Benzene. One user told Apple that he noticed a strong smell when he unpacked his Mac last year, and that 10 days later, he developed nose and throat irritation, reports the French newspaper Liberation. (A clunky English translation of the report can be found here.) [More] ...

Source: pubs.acs.org --- 8 days ago
Anna Rita Campanelli, Aldo Domenicano, Fabio Ramondo, and István Hargittai Web Release Date: Sat, 4 Oct 2008 00:00:00 EDT (Article) DOI: 10.1021/jp803425h ...

Source: www.lockergnome.com --- 12 days ago
Over at ZD-Net they are citing a French source that is making a big deal out of the fact that one, yes one, single Mac Pro owner says his computer made him sick. In the article it states that testing has shown that the Mac is giving off Benzene. The French article uses a translator [...] ...

Source: pubs.acs.org --- 18 days ago
J. C. Sancho-García and A. J. Pérez-Jiménez Web Release Date: Wed, 24 Sep 2008 00:00:00 EDT (Article) DOI: 10.1021/jp802160b ...

Source: pubs.acs.org --- 23 days ago
E. Gridelet, R. Locht, A. J. Lorquet, J. C. Lorquet, and B. Leyh Web Release Date: Fri, 19 Sep 2008 00:00:00 EDT (Article) DOI: 10.1021/jp8033424 ...

Source: www.isnare.com --- 17 days ago
Benzene is a very toxic compound This substance is marked carcinogen If it finds its way inside the body, it can cause dreaded diseases such as cancer... ...