relationships between the chemical composition and bioreactivity of dissolved organic matter

... 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 ... Biodegradation; Dissolved organic matter; DOC Introduction In the past 10 years, much progress has been made in the understanding of dissolved organic matter (DOM) functions and dynamics in soils ... that the soluble state is a prerequisite for the uptake and degradation of organic matter by microorganisms, then DOM should play a key role in the stabilisation and destabilisation of soil organic...

Ngày tải lên: 15/03/2014, 23:22

... on the improved understanding of the role of DOM in both reversible and irreversible fouling iv) To investigate the composition, characteristics, and fouling potential of DOM both in the MBR and ... 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 ... pore size in the range 0.001–0.1 µm (IUPAC 1996) The selectivity of MF and UF membranes is determined primarily by the ratio between the hydrodynamic diameter of the solute and the apparent pore...

Ngày tải lên: 14/09/2015, 11:16

... occupied 54% to total On the other hand, the adsorption isotherms of PAC in the dialysis membrane with molecular weight cut-off of 300,000 and 2,000,000 Da were almost the same and their adsorption capacities ... aeration tank The objective of this study is to clarify the effect of DOM and biofilm on the adsorption capacity of PAC in the aeration tank of PACT process Materials and methods 2.1 Operation of powdered ... days The amount of 3,5 DCP adsorbed by PAC in each reactor was estimated from the difference between the amount of 3,5-DCP in influent and the amount of 3,5-DCP discharged and biodegraded The...

Ngày tải lên: 05/09/2013, 08:40

... where, rSE is the 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 ... 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 ... Determinations of humic substances and other dissolved organic matter and their effects on the increase of COD in Lake Biwa, Anal Sci., 20, 159-164 Gurung T B and Urabe J (1999) Temporal and vertical...

Ngày tải lên: 05/09/2013, 10:17

... affected by pH and solid and dissolved organic matter Environ Sci Technol 1997;31:1109 – 15 Temminghoff EJM, Zee SEATMVD, Haan FAMD Effects of dissolved organic matter on the mobility of copper in ... 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 ... and 102%, respectively Fig shows the total concentrations and proportions of each of the DOC fractions in solution as a function of pH for two of the soils (Budel and Callantsoog) For seven of...

Ngày tải lên: 15/03/2014, 23:22

... Discussion EGU pling date around the middle and the other around the end of each month Throughfall and surface runoff samples were taken in the first and third week of each month, and additional samples ... if the declining growth is the reason for reduced N 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 ... (decomposition of litter and soil organic matter, plant exudates, fine-root and mycorrhizal turnover, and the waste products of macro and microorganisms), or by DON sinks (e.g adsorption in organic and mineral...

Ngày tải lên: 23/03/2014, 00:20

... 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 ... 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 ... afterwards These results agreed with the SUVA results between and weeks of incubation This further implied that the weak Zn binding sites in the river water DOM were significantly altered and more...

Ngày tải lên: 05/09/2013, 10:15

... [4] and the neuropharmacological properties [5] have been investigated as well To the best of the authors’ knowledge, there are no reports about the chemical content and biological effect of the ... due to the geographical location and the harvesting period It is noteworthy that the results of this study may be considered as the first report on the composition of the essential oils of this ... order of their elution on the HP-5MS non-polar column (Table 1) A total of 19 compounds were identified, representing 86.68% of the total oil The esters made up the largest component of the oil...

Ngày tải lên: 20/06/2014, 20:20

... [4] and the neuropharmacological properties [5] have been investigated as well To the best of the authors’ knowledge, there are no reports about the chemical content and biological effect of the ... due to the geographical location and the harvesting period It is noteworthy that the results of this study may be considered as the first report on the composition of the essential oils of this ... order of their elution on the HP-5MS non-polar column (Table 1) A total of 19 compounds were identified, representing 86.68% of the total oil The esters made up the largest component of the oil...

Ngày tải lên: 21/06/2014, 17:20

... agreement was found between the oil content of L resedifolia and that of L arboresens as was reported by Cheriti et al [6] The slight difference may be due to the geographical location and the harvesting ... noteworthy that the results of this study may be considered as the first report on the composition of the essential oils of this endemic species Chahma A voucher specimen was deposited at the herbarium ... reported in the literature [12] and stored on the MS library (NIST database) The concentration of the identified compounds was computed from the GC peak total area without any correction factor The compounds...

Ngày tải lên: 21/06/2014, 19:20

... of the structure of the roots of q-Bernoulli polynomials,” to appear in Journal of Computational and Applied Mathematics [15] C S Ryoo, T Kim, and R P Agarwal, “A numerical investigation of the ... powers In the recent paper [10], Kim and Rim constructed (h, q)-extensions of the twisted Euler numbers and polynomials They also defined (h, q)generalizations of the twisted zeta function and L-series ... Distribution and structure of the zeros In this section, we investigate the zeros of the twisted q-Euler polynomials En,q,w (z) by using computer Let w = e2πi/N in C We plot the zeros of En,q,w...

Ngày tải lên: 22/06/2014, 18:20

... exceeded the circumference of the crown This author reported that the width of spruce root systems in the Hronec locality was wider by 94 cm than the width of the crown On the other hand, Konôpka ... parts of trees The aim of this study is to compare the relationships between the aboveground parts and the parameters of root plates in adult Norway spruce trees growing in waterlogged and well-drained ... correlation between the aboveground parameters and the thickness of root plates in the two localities In general, it can be supposed that there is a correlation between the aboveground parts and the...

Ngày tải lên: 07/08/2014, 10:22

... (60% between and 15 cm, 30% between 15 and 30 cm, 10% between 30 and 60 cm and no roots below 60 cm) compared to the root distribution observed for trees (34% between and 15 cm, 29% between 15 and ... mineralization of organic matter and mineral weathering, as the role of vegetation should be limited in this phase, in the present mountainous site Their residence time is long and their concentration ... moisture, and the rather large amount of organic matter in the forest-oor were supposed to favour an increase in the mineralization and nitrication rates [9, 63] (iii) The disruption between production...

Ngày tải lên: 07/08/2014, 16:20

... 100-fold and the lifespan of the complex by 10-fold, as judged by koff The physiological chaperone cycle probably consists of the rapid binding of the N-terminus of the partner, regardless of whether ... enthalpy, independent of the buffer used in the experiment, and another term representing the contribution of the proton ionization of the buffer, which is multiplied by the number of protons that ... hypothesize that the protonated state of the chaperone initiates this cycle, whereas the deprotonated state occurs upon completion of the maturation process of the partner The nature of the signal...

Ngày tải lên: 16/02/2014, 14:20

... but further enhances the activity of the enzyme whose C-terminus has been displaced by low pH or by FC-induced binding of 14-3-3s Results The C-terminus of isoform of the PM H+-ATPase of A thaliana ... to study the mechanism of action of PPI1 The analysis of the pH dependence of PPI1induced activation of the H+-ATPase showed that stimulation decreases dramatically with the increase of pH above ... XL10 and the frame and the identity of the cloned fragment verified by sequencing The construct with the N-terminal portion of PPI1 has been previously described [22] The DNA fragment coding for the...

Ngày tải lên: 19/02/2014, 07:20

... 3A) and ATP (Fig 3B) in the absence and presence of curcumin, using the coupled enzyme assay In Fig 3A, the half-maximal activation of the ATPase by Ca2þ was measured in the absence of and in the ... sites and ligands, respectively, and [EL] is the concentration of bound ligand The total concentration of sites can be expressed as N[E]0, the product of total protein concentration ([E]0) and the ... side of the membrane While in the E2 form the Ca2þ binding sites have translocated across the membrane to the luminal side and are of low affinity Furthermore, in the E1 conformational state, the...

Ngày tải lên: 08/03/2014, 23:20

... resolved directly in the gel as described in Materials and methods The zymograms are presented as the negatives (B) Northern analysis of the induction of aldA and alcR in the presence of ethanol or ... Regardless of the growth substrate, the gratuitous inducer 2-butanone always elicites more powerful induction than the convertible compound ethanol Furthermore, the response of the acetyl-CoA synthetase ... D-galacturonic acid (D-GAA*) (right panel) (B) Northern blot analysis of the response of the alc genes to addition of D-glyceraldehyde and glycerol Ethanol served as the reference for induction Induction...

Ngày tải lên: 17/03/2014, 10:20

... The results are presented in Fig In the absence of ligand, none of the AR NTD proteins showed LBD interaction However, in the presence of ligand, both AR.NTDwt and AR.NTDD3– 13 bound to AR LBD with ... was lost The most obvious difference between both assays is the coupling of AR.NTD to GalAD in the yeast assay, and the absence of a second transactivation domain linked to AR NTD in the mammalian ... interaction with the charged clamp [5,36,37] The first and last leucine residue in the LxxLL motif enter the hydrophobic cleft in the LBD, and directly contact amino acid residues within the cleft The variable...

Ngày tải lên: 17/03/2014, 10:20

... position of the chemical shifts of proton H-4 and carbon C-4 of the Kdo-residue (C) of compound and the downfield shift to the same frequencies of proton H-5 and carbon C-5 of the Kdo-residue (C) of ... linked to the a-GlcN (A) of the lipid A backbone leading to a splitting of the signal of its anomeric proton and another phosphate linked to the 4-position of the b-configured GlcN (B) The far downfield ... 6¢ of the glucosamine disaccharide backbone of lipid A and is substituted at position by another sugar and at position by another sugar or phosphate [13] The LPS of the deep rough mutant I-69 of...

Ngày tải lên: 31/03/2014, 21:21

... from 20 to 60 years, and their mean duration of diabetes was 10.17 (SD = 7.2) All of the patients were recruited from the diabetes clinic of the Gülhane Hospital The majority of the participants ... Health and Quality of Life Outcomes 2008, 6:79 http://www.hqlo.com/content/6/1/79 Table 2: Means and standard deviations of trait anxiety and coping strategies of the participants of two types of ... Coefficients of correlations between age, type of diabetes and duration of diabetes, gender, educational status and monthly income were significant, whereas the correlations between type of diabetes and...

Ngày tải lên: 18/06/2014, 19:20