biological effects produced by polycyclic aromatic hydrocarbon epoxides

... Method performance was established by separate spiking experiments for blank oysters with firstly a mixture of aliphatic hydrocarbon standards (NIST1494 – C10-C34 hydrocarbons) and secondly a mixture ... aliphatic hydrocarbons and PAHs, spiking was carried out with NIST 1582 petroleum crude oil 12.1 Recovery Aliphatic hydrocarbons – The method was shown to be unsuitable for recovery of aliphatic hydrocarbons ... indicated below Calibration by the internal standardization is applied for the quantification of PAHs This calibration requires the determination of response factors Rf defined by the equation below...

Ngày tải lên: 09/09/2015, 09:38

... acknowledged Ambient Air Pollution by Polycyclic Aromatic Hydrocarbons (PAH) Position Paper July 27th 2001 Prepared by the Working Group On Polycyclic Aromatic Hydrocarbons PAH Position Paper July ... 98/70/EC In this context, PAH are defined as the total aromatic hydrocarbon content less the mono -aromatic hydrocarbon content The maximum content of aromatic compounds for fuels to be used for vehicles ... Guidelines for Europe: [WHO 2001] iv Report on Polycyclic Aromatic Hydrocarbons published by the UK Expert Panel on Air Quality Standards [EPAQS 1999] v Report by CONCAWE 98/55: "PAH's in Automotive...

Ngày tải lên: 17/02/2014, 11:20

... polycyclic aromatic hydrocarbons in urban air: a study in a medium traffic area in Rome, 1993-1998 Atmos Environ 33: 3739-3750 MENICHINI, E 1992 Urban air pollution by polycyclic aromatic hydrocarbons: ... Emission of Polycyclic Aromatic Hydrocarbons in Sampling Areas of the German Environmental Specimen Bank Method for the Precise Measurement of Gaseous and particle-Associated Polycyclic Aromatic Hydrocarbons ... Environmental Health Criteria 202, Selected Non-heterocyclic Aromatic Hydrocarbons, 1998 and NIST Special Publication 922, Polycyclic Aromatic Hydrocarbon Structure Index, Lane C Sander and Stephen...

Ngày tải lên: 15/03/2014, 16:20

... phytotoxicity and polycyclic aromatic hydrocarbon contamination in Salicornia fragilis Sci Total Environ 2007, 381:146-156 Oros DR, Ross JRM, Spies RB, Mumley T: Polycyclic aromatic hydrocarbon (PAH) ... higher plants exposed to polycyclic aromatic hydrocarbons and their N-heterocyclic derivatives Environ Toxicol Chem 2006, 25:3238-3245 Burritt DJ: The polycyclic aromatic hydrocarbon phenanthrene ... response to polycyclic aromatic hydrocarbon exposure is rapid and complex in Arabidopsis thaliana Plant Sci 2009, 176:375-382 Paskova V, Hilscherova K, Feldmannova M, Blaha L: Toxic effects and...

Ngày tải lên: 12/08/2014, 03:21

... are tolerated by the NK-1 receptor, the substitution of the flexible Gly by the even more flexible HGly causes a 30- to 40-fold decrease in affinity and biological activity Substitution by b3-HAla ... methylene group could have minor effects on the overall conformation and biological activity of the peptide Thus, SP was used as a model peptide to analyse the structural and biological consequences of ... of b- and a-amino acids were generated by molecular dynamics at high temperature followed by energy minimization Two thousand structures were generated by molecular dynamics at 1000 K, saving...

Ngày tải lên: 08/03/2014, 08:20

... practical biological treatment facility from September 2005 to September 2006 - 198 - Recent studies have reported that Sphingomonas sp degrade dioxin, nonylphenol, polycyclic aromatic hydrocarbon ... compounds by Sphingomonas sp strain BP-7 isolated from seawater Biosci Biotechnol Biochem., 71, 51-57 Shi T., Fredrickson J K and Balkwill D L (2001) Biodegradation of polycyclic - 200 - aromatic hydrocarbons ... bacteria by Bourne et al (2001) The enzyme encoded by the mlrA gene can break open the cyclic structure of microcystin After opening the ring structure, linear microcystin-LR is degraded by the...

Ngày tải lên: 05/09/2013, 10:15

... No (11): * I went to school BY the bus (ON) 46 Seventy students chose BY This can be easily understood They have learnt the rule BY + transportation”, for example: by car/ taxi / bus They didn’t ... operated by learner Crystal (1987:112) shared the same view point that error analysis is a technique for identifying, classifying and systematically interpreting the unacceptable forms produced by ... term “error “refers to some idiosyncratic or “un-nativelike” piece of language produced regularly and systematically by a number of learners This means only learners of a foreign language commit...

Ngày tải lên: 18/12/2013, 10:04

... MOLECULAR MECHANISMS AND BIOLOGICAL EFFECTS Edited by Volodymyr Lushchak and Halyna M Semchyshyn Oxidative Stress Molecular Mechanisms and Biological Effects Edited by Volodymyr Lushchak and ... and oxidizes many cellular components Biological effects of reactive oxygen species Reactive oxygen species have plural effects in biological systems These effects may be placed at least in four ... receptors activated byAGEs may also be involved in the observed effects Obviously, the complex RS metabolism is complicated by no less complex molecular mechanisms of their biological effects 6.4 Potential...

Ngày tải lên: 12/02/2014, 16:20

... 431359) and for Pt (marked by the astericks, pdf file 04-0802) The fundamental peaks of FePt structure were denoted by “f” and the superlattice peaks were denoted by “s” -10 -20 -30 100 200 300 ... atmosphere The structure of the nanoparticles was analyzed by using a Bruker D5005 X-ray diffractometer (XRD) Magnetic measurement was conducted by using a DMS-880 sample vibrating magnetometer (VSM) ... composition of the Fe-Pt nanoparticles was studied by using an energy dispersion spectroscopy (EDS OXFORD-ISIS 300) The thermal behaviour was examined by a differential scanning calorimetry (DSC, STD...

Ngày tải lên: 13/02/2014, 03:20

... previous institution is not counted in your Berklee G.P.A.) *Accredited by an accrediting agency or state approval agency recognized by the U.S Secretary of Education as a "reliable authority as to ... 747-8519, or stop by the Office of the Registrar (Uchida building, Suite 120) GENERAL REQUIREMENTS Official Transcripts Berklee College of Music values the college-level course work taken by students ... at my.berklee.net by clicking on Student Services, then selecting View Transcript from the menu on the left You can then compare your transcript/earned credits to the Grids by Major link (also...

Ngày tải lên: 15/02/2014, 14:20

... consumed by motile organisms, namely other eukaryotes and prokaryotes Plants defend themselves by physical barriers including cell walls at the cellular level, by the waxy cuticle of leaves and by ... indicated by * and *' superscripts (or, in the most complicated example to be encountered here, by 3*, 3*' and 4" superscripts to indicate two Cs each shared by three rings and another C shared by four ... medicinal plant efficacy may derive from complex synergistic effects or even from quasi-placebo effects connected with the taste, mild effects and appearance of the preparation While recognizing...

Ngày tải lên: 17/02/2014, 05:20

... and by mass spectrometric and NMR analyses of the oligosaccharide obtained from the polysaccharide by de-N-acetylation followed by deamination and reduction, the repeating unit of the EPS produced ... Interestingly, the repeating unit of the EPS produced by S thermophilus 8S contains also a Ribf residue This monosaccharide is commonly occurring in polysaccharides produced by Gram-negative bacteria [30], ... a constituent of the repeating unit of an EPS produced by a Gram-positive lactic acid bacterium Due to the novel composition of the EPS produced by S thermophilus 8S, the genetics and biochemistry...

Ngày tải lên: 08/03/2014, 09:20

... The Mr estimated by SDS/PAGE and gel filtration was 118 000 and 132 000, respectively, indicating that rP450foxy exists as a monomer-like native protein and rP450foxy produced by yeast [14] Spectral ... similar to those for the recombinant protein produced in the yeast or the native fungal protein [13,14] These results demonstrated that rP450foxy produced by E coli is kinetically and spectrally (above ... & Wong, L.L (2001) Protein engineering of Bacillus megaterium CYP102 The oxidation of polycyclic aromatic hydrocarbons Eur J Biochem 268, 3117–3125 19 Murakami, H., Yabusaki, Y., Sakaki, T., Shibata,...

Ngày tải lên: 08/03/2014, 22:20

... the text are indicated in black conformations by crystal packing could not be excluded, as the crystals of the complex structures were obtained by soaking with pNPG3 or cellobiose In HjeCel6A–(Glc)2-S-(Glc)2, ... of cellobiose when cellulose is present Similar activity has been reported in a GH7 enzyme produced by basidiomycete Phanerochaete chrysosporium, PcCel7A [28–30] This enzyme shows the amino acid ... the CcCel6B, -6D and -6E genes Interestingly, the transcript level of CcCel6C was not influenced by either glucose or cellobiose When the enzymatic properties were investigated, CcCel6B and CcCel6C...

Ngày tải lên: 15/03/2014, 10:20

... Sciences, Polycyclic Aromatic Hydrocarbons: Evaluation of Sources and Effects (National Academy Press, Washington, DC, 1983) 102 G Grimmer, Ed., Environmental Carcinogens: Polycyclic Aromatic Hydrocarbons: ... Academy of Sciences, Particulate Polycyclic Organic Matter (National Academy Press, Washington, DC, 1972) 100 A Bjørseth, Ed., Handbook of Polycyclic Aromatic Hydrocarbons (Dekker, New York, 1983) ... M White, Ed., Nitrated Polycyclic Aromatic Hydrocarbons (Huethig, Heidelberg, Germany, 1985) ¨ 161 J Lewtas and M G Nishioka, in Nitroarenes: Occurrence, Metabolism, and Biological Impact (Plenum,...

Ngày tải lên: 15/03/2014, 20:20

... for understanding the structural basis of the multiple biological effects displayed by ureases Acknowledgements This work was supported by Conselho Nacional Desenvolvimento ´ Cientı´ fico e Tecnologico ... methods Protein determination The protein content of samples was determined by their absorbance at 280 nm or, alternatively, by the method of Spector [20] Fig SDS/PAGE patterns of JBU and SBU SDS/PAGE ... gels were stained with Coomassie Blue R-250 Ó FEBS 2004 Other biological activities of ureases (Eur J Biochem 271) 1359 Assay of biological activities of ureases Toxic activity was expressed...

Ngày tải lên: 16/03/2014, 16:20

... was made by treatment of the native O-PS (47 mg) in water (10 mL) with 1-(3-dimethylaminopropyl)-3-ethyl carbodiimide (150 mg) maintained at pH 4.7 over h followed by reduction at °C by sodium ... (results not reported) to those previously found in glycoproteins produced by Flavobacterium meningosepticum [12] The LPS was delipidated by treatment with hot dilute acetic acid and after removal of ... 3445 Discussion In this investigation, it was shown by 1D and 2D NMR analysis, MS, and chemical methods that the O-PS of the LPS produced by F columnare ATCC 43622 is a linear unbranched polymer...

Ngày tải lên: 17/03/2014, 10:20

... sets of trees derived by IG's (like those of TAG's) are context-free languages Trees derived by IG's exhibit a property that is not exhibited by the trees sets derived by TAG's or CFG's Informally, ... is bounded by the grammar (in fact the maximum cardinality of a tree set determines this bound) Hence, trees shown in Figure can not be generated by any MCTAG (but can be generated by an IG) because ... strncV.tres by substrings and the composition operation by its effect on subswings is related to the work of Rounds (1985) Although embedding this version of LCFRS's in the framework of ILFP developed by...

Ngày tải lên: 17/03/2014, 20:20

... porous titania thin films by a novel route for possible applications as fast responding chemical gas sensors A simple method was adopted to grow titanium dioxide thin films by thermal oxidation technique ... checked by glancing angle X-ray diffraction studies (GAXRD) at different incident angles The difference in the porous morphology attributed to the etched samples due to UV radiations was analyzed by ... (10 nm) of Ti–2 wt%Al solid solution was deposited by e-beam evaporation at a base pressure of × 10−6 mbar The solid solution was prepared by mixing titanium metal with wt% aluminium (99.9%)...

Ngày tải lên: 19/03/2014, 16:47

... photoaf®nity labeled by a dioxin analog, nor activated by b-naphto¯avone in a yeast system [20]; the rainbow trout AhRa that binds TCDD [21] and the Microgadus Tomcod AhR also activated by TCDD [22] ... stabilizes the complex by hydrophobic interactions, Arg333, at the entrance of the cavity, may guide TCDD towards its binding site by long-range electrostatic interactions and, by interacting with ... substituted by Cys327 in all AhR receptors, except for AhR-1C.E where methionine is present At the entrance of the FixL ligand cavity, Arg220, that binds a heme propionate group, is replaced by Thr...

Ngày tải lên: 24/03/2014, 00:21