molecular indicators of the bioavailability of dissolved organic matter

... the adsorption isotherms of PAC in the dialysis membranes with molecular weight cut-off for 3,5-DCP The adsorption capacity of PAC in the dialysis membrane with the molecular weight cut-off of ... 3,5-DCP, the adsorption capacity of PAC in the membrane with molecular weight cut-off of 300,000 Da was significantly higher than that in the aeration tank The decrease in the Amount of Organic ... repeated times For biofilm developed on PAC, the incubation was The amount of organic carbon was indicator as the amount of biofilm developed on PAC shows the amount of organic carbon on PAC...

Ngày tải lên: 05/09/2013, 08:40

... ratio of the filtrated secondary effluent to the volume of the BOD bottle, rLW is the ratio of the filtrated lake water to the volume of the BOD bottle, and OCSE is the oxygen consumption by the ... particulate organic matter did not affect CODMn, the possibility of accumulation of dissolved organic matter (DOM) is pointed out (Imai, 2002) On the other hand, Takahashi (1999) reported that dissolved ... that the k evaluated will be different to some extent from the actual value, but the fact that the ratio of the reciprocal of k is in the same order as the ratio of CODMn implies a contribution of...

Ngày tải lên: 05/09/2013, 10:17

... communication) Other problems of these reactors are the release of DOM into the solution and the adsorption of DOM onto the biofilms Furthermore, it seems impossible to determine the pool sizes and the residence ... degradation of compounds that are otherwise not bioavailable according to the above definition Therefore, in the context of DOM, the term bioavailability describes the potential of microorganisms ... different amounts of these fractions, and consequently, the kinetics of the degradation process will be very different Quantification of the contribution of DOM to the stable C pool in the mineral...

Ngày tải lên: 15/03/2014, 23:22

... correlations also exist for the partitioning of FA; however, there is little dependency of the partitioning of Hyd on pH The results for these two soils are representative of the other 407 16 soils tested ... fractions are of limited value because of the manipulations (especially pH) that are required in the fractionation procedure The concentration of organic carbon and the percentage of the TOC contained ... that illustrates the importance of the role of organic matter in metal mobility in the environment This research focuses on desorption of organic carbon (DOC) and trace metals from the solid phase...

Ngày tải lên: 15/03/2014, 23:22

... recalcitrant compounds in terms of zinc complexation On the other hand, a further examination of the variation of labile Zn during the incubation revealed a slight increment of the labile Zn concentration ... month of incubation In contrast to the results of the preliminary experiment for river water, there was also no significant variation of SUVA in the incubation of DOM in WWTP effluent The results ... class of ligands having one representative conditional stability constant K' The slope of the line corresponds to the conditional stability constants K' The y-intercept of the line gives the product...

Ngày tải lên: 05/09/2013, 10:15

... system, the focus of this thesis is mainly on DOM fouling in MBR systems Therefore, it is not the task of this thesis to either investigate the roles of other components in MBR fouling, or analyze the ... membrane fouling The higher the amount of carbohydrate presented, the more serious the fouling occurred Chapter 1-Introduction On the other hand, it has been observed that the concentration of DOM in ... explanation of DOM accumulation In order to fulfill the objectives of this study, the characteristics of DOM obtained from the pilot MBR systems were investigated using the classical dissolved organic...

Ngày tải lên: 14/09/2015, 11:16

... retention or if the high N load and the N saturation of this natural − stand is the cause of the reduced growth A mean NO3 -N leaching for the two years −1 −1 of observation of 39 kg N yr imposed ... synthesis on organic N deposition (0.6–10.9 kg N yr with a −1 −1 median of 2.2 kg N yr ; Neff et al., 2002) We therefore checked the quality of the measurements, but found no reason to doubt the ... 1994) Adding the DON fluxes to the canopy balance did not change the pattern of canopy uptake and release among the three forests, since the DON flux in throughfall was close to that of the precipitation...

Ngày tải lên: 23/03/2014, 00:20

... influences of NOM on the removal of ibuprofen in the presence of carbonate alkalinity The experimental results and model simulation revealed that the presence of NOM generally enhanced the removal of ... With the addition of an external inhibitor (tert-butanol), the rate constants of NOM as the initiator and inhibitor can be determined from the slope and intercept of the plot of 1/Rct vs the external ... 73 CHAPTER MODELING THE INFLUENCES OF NOM ON THE REMOVAL OF IBUPROFEN DURING WATER OZONATION 74 5.1 Modeling the influences of NOM on the degradation of ibuprofen by ozonation ...

Ngày tải lên: 09/09/2015, 10:08

... suspended in the drainage water and to ensure the smooth flow of drainage water through the equipment, the volume of charcoal in the nylon net bags was varied from the inlet to the outlet in the equipment ... Thus, the filling rate of charcoal in nylon net bags was 50% close to the inlet, 70% in the middle of the course and 90% close to the outlet (Fig (a)) The total volume of charcoal used in the equipment ... removal mechanism for these metals was not clear in these results Zn removal was not correlated with the removal of any substances On the other hand, the correlation coefficients of the TOC reduction...

Ngày tải lên: 05/09/2013, 09:38

... SYNTHESIS OF HUMIC SUBSTANCES The synthesis of humic substances has been the subject of much speculation Felbeck (1971) lists the following four hypotheses for the formation of these materials ( a ) The ... believes that the magnitude of the E4/E6 ratio is related to the degree of condensation of the aromatic C network, with a low ratio indicative of a relatively high degree of condensation of aromatic ... yield of 10% of theory, the reduction products identified from the HA and FA could account for about 12% of the HA “nucleus” and for 25% of the FA “nucleus” This may mean that “nuclei” of soil...

Ngày tải lên: 30/05/2014, 22:57

Ngày tải lên: 13/11/2014, 10:31

Ngày tải lên: 14/11/2014, 06:07

... leads to a decline of the filter ability of the constructed wetland The objective of this study is to survey the vertical and horizontal distribution of the OM in sand bed of the experimental constructed ... mainly by the existing of micro-organisms in the wetland system Composed organic matters synthesize dark, amorphous, colloidal mass, called humus Humus is the active component of soil organic matter ... properties of soils even at the relatively low amount usually found in soils The macrophyte plants transport approximately 90% of the oxygen available in the root zone (Lee, 2007) Such the oxygen in the...

Ngày tải lên: 24/01/2014, 00:20

... wavelength of 1.540600 Å The X-ray data was collected using an MBraun curved PSD with a chamber depth of cm The focal radius of the system was 57 mm, and the cm length of the PSD subtended ∼25° 2θ of the ... however, the assignment of component polymorphs to sample mixtures depended on the XRPD results Conclusions Interconversions of the Polymorphs of Disodium Salt The interconversions of polymorphs of the ... Form I to Form II melt of Form II melt of Form VI melt of Form VI Form I to Form II melt of Form II loss of water melt of Form VI loss of water melt of Form VI Table Summary of combined DSC/XRD...

Ngày tải lên: 14/02/2014, 03:20

... in IVD, the effect of the mutation was further investigated by molecular modelling Together with the previously reported traits of the sku mutant, the molecular and physiological effects of IVD ... motif of Gly–Gly–X–Gly The second glycine of this motif (Gly374) is known to make a hydrogen bond with the pyrophosphate moiety of the FAD of the next monomer in the tetramer [16] However, the ... the surface of the monomer, pointing toward FAD or its neighbouring monomer in the tetramer By contrast, the side chain of the mutated residue (Val376) points toward the inside of the helix–loop–helix...

Ngày tải lên: 18/02/2014, 04:20

... in the one-cell stage to visualize the localization and to measure the mobility of the components in the PGCs The medaka embryo was peeled off the chorion, and the segment containing the part of ... of OlvasGFP reveals the dynamic nature of the nuage Schematic diagram of the preparation of PGCs of medaka specimen (A) OlvasGFP was expressed in the medaka PGC at stage 24 and localized in the ... outside of the nuage in the cytoplasm of the migrating PGC FCS analysis revealed that Olvas GFP diffused with a diffusion constant of 7.0 lm2ặs)1 (Fig 3A) During the measurement of the PGC, the 10...

Ngày tải lên: 18/02/2014, 16:20

... enhances the proliferation of FLS [13,47] Our group reported that the proliferation of FLS by MCP4 ⁄ CCL13 is dependent on activation of the extracellular regulated kinase MAPK The activation of MAPK ... Chemokines in the joints of patients T Iwamoto et al positive chondrocytes results in a specific increase in the release of MMP-3 [10] Pathological concentrations of SDF-1 ⁄ CXCL12 induce the death of human ... macrophages are the dominant source of MCP-1 ⁄ CCL2 production [19] The levels of MCP-1 ⁄ CCL2 correlate significantly with the levels of IL-1b, IL-6 and IL-8 ⁄ CXCL8 in culture supernatants of synovium...

Ngày tải lên: 18/02/2014, 18:20

... (pTDN1) [14] The lack of characterization of the structural determinant of the substrate specificity of the AtdA enzyme has thus limited its development as a biocatalyst for the bioremediation of a wide ... reported which of the five genes control the substrate specificity of the AtdA enzyme The objective of this study was to identify and probe the residues determining the activity as well as the substrate ... may indicate that the steric limitation of the enzyme’s binding pocket takes place in the area between the ortho and para positions of the aromatic substrate On the basis of these results, aniline...

Ngày tải lên: 19/02/2014, 02:20

... wild-type ALP I On the other hand, the Tm of D266N/Y269A-ALP I increased by only °C The denaturation temperature indicates the stability of the structure of the protein The difference of the increments ... surrounding residues of the depression, and the side chain of the mutated residue might restrain the mobility of the N-terminal region on the surface by interaction with the main chain of Lys26 by van ... the substitutions did not influence the activities or specificity of the mutant enzymes The N-terminal region of ALP I was also on the surface The side chains of Ile10 and Tyr11 were close to the...

Ngày tải lên: 21/02/2014, 03:20

... established Of two possible dimeric structures of LPL, the head-tohead and the head-to-tail models, the studies of the chimeric proteins of hepatic lipase and LPL and the tandem repeat approach of LPL ... in the same direction with the heparin-binding domain at the N-terminal end [14] The other is a cluster of tryptophans (Trp390, Trp393, and Trp394) exposed to the surface (Fig 1A) The cluster of ... peak of wild-type LPL The LPL in the eluate was detected by Western blot with LPL polyclonal antibody 7640 The fraction number of the high-affinity peak was the same for the wild type and the WW...

Ngày tải lên: 21/02/2014, 15:20