microbial degradation of persistent organophosphorus flame retardants

... MICROBIAL COMMUNITY STRUCTURE IN ANAEROBIC DEGRADATION OF TEREPHTHALATE AND PHENOL CHEN CHIA-LUNG (MSc, NCKU) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY DEPARTMENT OF CIVIL ... SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY DEPARTMENT OF CIVIL ENGINEERING NATIONAL UNIVERSITY OF SINGAPORE 2007 ...

Ngày tải lên: 11/09/2015, 16:05

... 7.1 Batch degradation of phenol using GAC sludge sample (A) Phenol 118 degradation (B) SMA of phenol degradation Figure 7.2 SEM images of a whole sludge granule (A) and the surface (B) of 119 granule ... Figure 5.7 Degradation of terephthalate at 37, 46, 50 and 55°C (A) Bioflm on 88 packing materials from upper region of reactor (B) Biomass from sludge bed xv Figure 6.1 Degradation of phenol in ... terephthalate degradation pathway 24 2.2.3 2.3 Methanogenic degradation of terephthalate and phenol Proposed phenol degradation pathway 26 Microbial communities for terephthalate and phenol degradation...

Ngày tải lên: 11/09/2015, 16:05

... terephthalate or phenol degradation Therefore, the microbial community structures in anaerobic degradation of terephthalate and phenol remain to be further characterized Recently, microbial populations ... 2006) This microbial process is very important in anoxic/anaerobic catabolism of organic subastance leading to the production of methane This process usually involves degradation of organic substance ... the reactor (zone of fixed-biofilm process) and the inoculum is seeded at the base of the reactor (UASB form) As active anaerobic sludge is retained by sludge granulation or biofilm formation,...

Ngày tải lên: 11/09/2015, 16:05

... formed; Determination of the effects of UV intensity to confirm possibility of obtaining higher PCB degradation at shorter reaction time; Analysis of the kinetics of PCB degradation ACKNOWLEDGMENTS ... the report of Alnaizy and Akgerman (2000) on the degradation of phenolic compounds After 60 minutes of irradiation, 76% PCB degradation was obtained with pH 3, 78% with pH 10, 87% degradation ... observed at 80 ppm which gave a lower degradation efficiency of 79% after 60 minutes of reaction The amount of PCBs in the solution may have inhibited the degradation of the compound and it is possible...

Ngày tải lên: 05/09/2013, 09:08

... various amounts of sodium pyruvate, g of ammonium acetate, 0.6 g of pyrocatechol, 0.2 g of sodium sulfite, 0.1 g of EDTA, and cells harvested from 100 ml of broth, in a total volume of 100 ml.The ... metabolic engineering or by combinations of these types of engineering (hydroxy-l-proline) In this paper some representative examples of microbial production of amino acid will be summarized and ... the presence of high concentrations of sugar and ammonium ions, appropriate concentrations of minerals, and limited concentrations of biotin under aerobic conditions The amount of l-glutamate...

Ngày tải lên: 26/10/2013, 02:20

... designed for catalytic degradation of waste plastics The reactor is designed for a capacity of 1kg of feed for every batch trial Using density data of plastics the volume of the reactor required ... Cracking of Municipal Plastic waste for recovery of gasoline range hydrocarbons, Department of Chemical Engineering National Institute of Technology Rourkela Ramesh Babu, R.K.Singh “A study of degradation ... Recovery of Gasoline Range Hydrocarbons, PhD thesis Engr C O Osueke Engr I O Ofondu, Conversion Of Waste Plastics (Polyethylene) To Fuel By Means Of Pyrolysis, International Journal Of Advanced...

Ngày tải lên: 27/11/2013, 21:37

... downstream activation of a family of cytosolic cysteine proteases, caspases, which are required for many of the morphological changes that occur during apoptosis The mitochondrial release of cytochrome ... Itch promotes tBid degradation Fig tBid, the active, apoptotic form of Bid, interacts with the ubiquitin ligase Itch, which leads to its degradation and proteasomedependent degradation (A) HEK-293T ... cells were cotransfected with constant amounts of rLuc–Itch and various amounts of either Bid–GFP of tBid–GFP The graph is a representative example of the saturation studies performed to provide...

Ngày tải lên: 16/02/2014, 09:20

... total amounts of each of the amino acids in tropoelastin (isoform 2) (2 of 157 possible x-Ala bonds) but are cleaved to a small extent by MMP-9 (12 of 157) and even more by MMP-12 (24 of 157) The ... analysis, all samples were stored at )30 °C MALDI-TOF ⁄ TOF MS analysis Analysis of the digests was conducted by of ine nanoHPLC ⁄ MALDI-TOF ⁄ TOF MS, using a nanoHPLC system (Ultimate 3000; Dionex, ... behavior of elastinolytic MMPs and the nature of the peptides released on degradation This approach may aid in the development of directed therapies to treat pathologies related to elastin degradation, ...

Ngày tải lên: 16/02/2014, 14:20

... gure (C) Time course of the degradation of (GlcNAc)3 (r) and (GlcNAc)4 ( ) by LlChi18A, illustrated by the production of (GlcNAc)2 during the initial linear phase of the degradation reaction ... subfraction of a-chitin Thus, LlCBP33A has an effect on the degradation of a-chitin, but the effect is smaller than the effects of CBP21 [10] or LlCBP33A (below) on b-chitin The degradation of b-chitin ... role of this serine in the catalytic mechanism of family 18 glycosyl hydrolases is to help in the stabilization of a temporary surplus of negative charge that develops on the rst aspartate of the...

Ngày tải lên: 18/02/2014, 08:20

... fast degradation of IL-1b transcript independently of the presence of AREs (Fig 6B, lanes and 5) It is possible that in the region located before the AREs, consisting of 343 bp of the 3¢ UTR of ... and also of its own transcript For this reason, the level of mRNA for the wildtype form of MCPIP and the level of mRNA for IL-1b (Fig 5A, lane 3) were lower in comparison to the level of mRNA ... the dynamics and features of this protein Role of MCPIP in regulation of the endogenous IL-1b transcript level After identification of a PIN domain in the MCPIP by use of bioinformatics, we decided...

Ngày tải lên: 18/02/2014, 14:20

... activation of Ga16 and Gaq subunits Therefore the lack of change in the rate of degradation cannot be due to lack of receptor-activation of the alpha subunits Given that the activation of G proteins ... 10SS was 5371 Proteasome degradation of Gq proteins A B B Johansson et al type (40% left of the protein) at h of chase (Fig 7A,B) We also analyzed the rate of degradation of another mutant Gaq protein, ... Proteasome degradation of Gq proteins B B Johansson et al A C B D E Fig The degradation of Gaq and Ga16 is specifically decreased by proteasome inhibitors The effect of protease inhibitors on the degradation...

Ngày tải lên: 20/02/2014, 03:20

... response rate of 70.8% (Health Area range 63.9–79.4%) The demographic profile of the sample is comparable to that of NSW as a whole (Blyth et al, 2001) 11 The high price of pain Some 20% of females ... Gairdner Hospital, Perth Associate Professor Christopher Maher Faculty of Health Sciences, University of Sydney Associate Professor Michael Nicholas University of Sydney Pain Management Research ... essentially two ways of estimating each type of cost: • top-down: providing the total costs of a program element (eg health system); or • bottom-up: providing estimates of the number of cases in the...

Ngày tải lên: 20/02/2014, 20:20

... disappears To determine whether a small amount of a-L-1,3-arabinofuranosidase was responsible for the disappearance of Fig HPAEC analysis of the hydrolysis of arabinogalactans by GALA Three different ... in duplicate The hydrolysis activity of GALA with different arabinogalactans was measured in duplicate by HPAEC and MALDI-TOF MS after incubation of mgÆmL)1 of potato, onion and soy arabinogalactan ... D-galacto-oligosaccharides were expressed as percentages of the area of mM D-galactose A niger b-1,4-endogalactanase (Eur J Biochem 269) 4987 MALDI-TOF MS MALDI-TOF MS was performed with a Voyager-DE RP Biospectrometry...

Ngày tải lên: 21/02/2014, 01:21

... toxicokinetics and fate of brominated flame retardants – a review Environ Intl 29:801-828 Hamers et al (2006) In vitro profiling of the endocrine-disrupting potency of brominated flame retardants Toxicol ... Chlorinated Flame Retardants environment and many have been found to be bioaccumulative In addition to the PBDE replacements, other BFRs and CFRs that are used as flame retardants in a wide of variety of ... exposure to brominated flame retardants and polychlorinated biphenyls in Japan Endocr J August 22, 2008 [Epub ahead of print] Karlsson et al (2006) Levels of brominated flame retardants in Northern...

Ngày tải lên: 05/03/2014, 20:20

... Sứrbotten et al Degradation of chitosans with ChiB Fig Time course of ChiB degradation of a chitosan with FA ẳ 0.65 The graph shows the degree of scission (a) as a function of time The slope of the line ... ChiB degradation of a high molecular mass chitosan with FA ẳ 0.65 Time course of the reaction Progress in chitosan degradation can be determined as the degree of scission (a), i.e the fraction of ... end of the reaction, the relative amount of DA starts to increase, nally reaching 34% of the total amount of dimers NMR analyses of the tetramer fraction at a ẳ 0.11 (Fig 5A) revealed a FA of...

Ngày tải lên: 07/03/2014, 16:20

... Effects of glycosidase inhibitors on the stability of amino acid-substituted ASAs In order to elucidate the role of trimming reactions of the N-linked oligosaccharide side chains in ER associated degradation ... showed a uniform pattern of stabilization or more rapid degradation upon addition of inhibitors 1182 P Poeppel et al Influence of ER a1,2-mannosidase I inhibition on ER exit of amino acid-substituted ... behaviour of ASA mutants in the ER in the presence of various inhibitors is identical, 1185 Arylsulfatase A degradation showing that all mutants interact uniformly with components of the ER degradation...

Ngày tải lên: 07/03/2014, 17:20

... of Centriprep 10 (Amicon, Billerica, MA, USA) A total of mg of the antibody was dissolved in 2.7 mL of a buffer (pH 8.0) consisting of 50 mm Tris and 0.15 m NaCl and reduced by the addition of ... only a slight digestion of the a-subunit B because of its low concentration At h of incubation (lane 2), significant changes of the band pattern were observed The bands of partially dissociated ... mixing (lane 1) At h of incubation (lane 2), the bands of partially dissociated urease (am b n) became faint as well as the band of the b-subunit monomer In contrast, the intensity of the band (1)...

Ngày tải lên: 07/03/2014, 21:20

... control [9] Various degradation pathways exist in the ER The best characterized of these pathways is proteasomal degradation of glycoproteins, which involves the modification of their N-linked oligosaccharide ... as a result of the retention of the defective enzyme in the ER [8] In addition, the continuous reduction of the amount of defective enzyme during the chase period demonstrates its degradation ... leads to a more rapid degradation of a fraction of the wild-type enzyme By contrast, coexpression of the defective enzyme with wild-type enzyme does not enhance the half-life of the P377L-pdASA...

Ngày tải lên: 15/03/2014, 23:20

... oxidationdependent degradation of PTPs by calpain may be of more general importance The sensitivity to oxidation may vary with the PTP For example, the lower sensitivity of SHP-1 for UVA-induced degradation ... acid each under control of the unicornễ software (GE Healthcare) The LTQ was operated under control of the xcalibur 1.4ễ software (Thermo Electron Corp.) For processing of the CID-spectra (MS ... on the overlay of the crystal structures of both reduced and FEBS Journal 276 (2009) 56225633 ê 2009 The Authors Journal compilation ê 2009 FEBS 5625 Calpain-mediated degradation of reversibly...

Ngày tải lên: 16/03/2014, 00:20

... stimulation of SSTR1 induced accumulation of SST-14 in cells via a dynamic process of internalization, recycling and reinternalization of the ligand [11] In contrast, stimulation of SSTR2A with ... process of the receptor, the fate of the peptide agonist has not thus far been analyzed after cointernalization with SSTR3 Intracellular degradation of somatostatin Therefore, we examined the fate of ... Localization of SSTR3 after chronic stimulation with SST-14 Chronic stimulation of SSTR3 with SST-14 mediates downregulation of SSTR3 The immunofluorescence signal of SSTR3 is concentrated in one area of...

Ngày tải lên: 16/03/2014, 06:20