effects of dissolved organic matter on hydrophobic organic contaminant bioavailability to aquatic organisms
Effect of dissolved organic matter (DOM) and biofilm on the adsorption capacity of powdered activated carbon in activated sludge
... Journal of Water and Environment Technology, Vol.1, No.2, 2003 3.2 Effects of dissolved organic matter (DOM) on adsorption capacity of PAC DOC concentrations in the effluent of the control rector ... Carbon/amount of PAC ( mg g-1) adsorption capacity of PAC does not totally due to the adsorption of DOM on PAC 10 AC AC AC AC PAC on P on P on P on P ion ion tion New tion ba ba bat bat incu incu incu ... 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 after each incubation Figure...
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Influence of Phosphorus Concentration on the Biodegradation of Dissolved Organic Matter in Lake Biwa, Japan
... several reports on the characterization of DOM in Lake Biwa Hori et al (1998) tried to fraction DOC based on the adsorption characteristics onto hydrous iron oxide at pH ranging from to As a result, ... contamination Evaluation of oxygen consumption Oxygen consumption for 5-day incubation (OCobs) was calculated as the difference between DO before and after incubation Then, oxygen consumption by the ... range of 0.003 to 0.004 mgP/L and biodegradation activity dropped to half of the maximum value when DP was in the range of 0.006 to 0.007 mgP/L Effect of biodegradation activity change on DOM concentration...
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Biological Alteration of Zinc Complexation Characteristics of Dissolved Organic Matter in Domestic Wastewater Treatment Plant Effluent under River Water Environment
... complexation parameters Determination of dissolved and labile Zn, DOC, UV absorbance and SUVA Dissolved organic carbon concentration was measured as non-purgeable organic carbon with a TOC analyzer (TOC-VCSH, ... after month of incubation Decline of total ambient binding site concentration (from 960 nM to 750 nM) by 22% after one month of incubation, might have caused this slight increase of labile Zn concentration ... 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 (from 2.1 µg/L to...
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THE EFFECTS OF THREE ORGANIC CHEMICALS ON THE UPPER THERMAL TOLERANCES OF FOUR FRESHWATER FISHES potx
... values of to 5ЊC caused by sublethal concentrations of some organic chemicals may reduce the ability of fish to survive natural temperature fluctuations Exposure of wild fish to sublethal concentrations ... 1989 Effects of phenol exposure on the thermal tolerance ability of the central stoneroller minnow Bull Environ Contam Toxicol 42:614–619 60 Hutchison VH 1976 Factors influencing thermal tolerances ... Thompson GB 1992 Toxicity of endosulfan to native and introduced fish in Australia Environ Toxicol Chem 11:1469–1476 53 Lydy MJ, Wissing TE 1988 Effect of sublethal concentrations of copper on the...
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Controls of bioavailability and biodegradability of dissolved organic matter in soils
... Keywords: Bioavailability; 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 ... bioreactors initially require long equilibration times (up to months) and continuous maintenance to achieve reproducible degradation rates (McDowell, personal communication) Other problems of these ... 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 times of a rapidly...
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Correlation of the partitioning of dissolved organic matter fractions with the desorption of cd
... 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 ... objectives of this study are to (1) fractionate the DOC in water extractions of the soils, (2) examine the concentrations of the operationally defined DOC fractions in the extracts as a function of system ... 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 to solution in 18...
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Fouling and accumulation of dissolved organic matter in membrane bioreactors
... avoid conditions that lead to poor settleability and/or bulking of sludge (Cheremisinoff, 1994; Bitton, 1999) Very often, however, economic constrains limit such options Even with such controls, ... Since the concentration of DOM is normally several orders of magnitude less than that of MLSS, its contribution to the total filtration resistance is often intuitively supposed to be insignificant ... filtration of the fractional components of DOM in MBR3 with hydrophobic GVHP membranes 73 Figure 4.10 Normalized permeate flux for the filtration of the fractional components of DOM...
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Effects of heat organic matrix on enamel demineralization diffusion
... only in the integrity of organic matter The ashed samples did 12 not exhibit the phenomenon of activated diffusion So it can be concluded that the pore constriction has a close relationship to ... from 100℃ to 140℃, up to a peak at 140℃ The pyrolysis and volatilization of organic constituents change from 250℃ to 400℃, up to a peak at 350℃ (protein decompose) The oxidation of carbon content ... demineralization (Theuns et al., 1986a) Secondly, the initial stage of lesion formation is described as the dissolution of mineral with outward diffusion of calcium and phosphate ions As this diffusion ions...
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Input and output of dissolved organic and inorganic nitrogen in subtropical forests of South China under high air pollution docx
... Printer-friendly Version Fig Concentrations of DON in precipitation (a), throughfall (b) and soil solution (c) from Figure Concentrations of DON in precipitation concentration and soil solution (c) from three ... in the concentrations of either DIN or DON between bulk and wet-only precipitations (Fig 2–4), suggesting a very little contribution of dry deposition Thus, the means of the three collectors in ... volume-weighted concentration of DON was 1.1 mg N L Monthly DON inputs correlated positively with the concentrations (r =0.85, P =0.003, n=7) but were independent of monthly precipitation amount 15...
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AN ACTION RESEARCH ON THE EFFECTS OF PRE WRITING ACTIVITIES ON THE GRADE – 11 NON – MAJOR ENGLISH STUDENTS’ MOTIVATION IN WRIT
... forms to express those ideas To sum up, there is no one perfect way to teach writing We teachers have to take into consideration the many factors of our context before deciding which approach to ... in many parts of the world In the tendency of integration of the global economy, English is one of the effective communicative tools for everybody The role of English is considered to be very important ... and solutions to solve the problem In addition, their suggestions of how to make the pre – writing activities effectively were also mentioned To complete the questionnaires, teachers had to tick...
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Tài liệu The Effects of Education and Health on Wages and Productivity ppt
... labour market effects of chronic illness relate to the effects of the conditions on workforce participation People who contract the target conditions but remain at work tend not to experience ... these conditions had the largest effects on workforce participation 26 EDUCATION, HEALTH AND WAGES Table 5.2 Marginal effects of target health conditions on hourly wages Target condition Percentage ... and higher levels of education Failing to account for the feedback effects of wages on health and education can lead to biased estimates of the effects of health and education on wages Endogeneity...
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Tài liệu MIT Joint Program on the Science and Policy of Global Change: Effects of Air Pollution Control on Climate pdf
... carbon uptake (due to avoided ozone damage) of 0.6 to 0.9 gigatons of carbon is only to 4% of year 2100 reference projections of anthropogenic fossil CO2 emissions (which reach nearly 25 gigatonsC/year ... 12 to 22% of the total cost of a 550ppm stabilization policy The disproportionately large economic value of the additional carbon uptake has two reasons One reason is that the fossil carbon reduction ... the effects of air pollution policies on overall demand for fossil fuels and on the choice of fuels (coal, oil, gas), nor have we considered the effects of caps on black carbon or organic carbon...
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Aesthetic issues in spatial composition: effects of position and direction on framing single objects pot
... these conventions to convey feelings of isolation, loneliness, and/or longing Although such considerations are beyond the scope of the experiments we report in this article, it is also a topic ... functions for right-facing and left-facing instructional conditions The results of a two-way analysis of variance on the positions of the centers of the objects indicate a main effect of facing ... corresponding real object’s motion to take it to or toward the center of the frame, whereas the merely-facing objects would not We operationally defined the ‘location’ of an object as the location of...
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Báo cáo khoa học: "Effects of Word Confusion Networks on Voice Search" pdf
... WCNs using the composition operation of FSTs We formulate the parsing problem as associating with each token of the input a label indicating whether that token belongs to one of a business listing ... the context of voice local search, users expect overall system response time to be similar to that of web search Consequently, the relatively long ASR latency leaves no room for a slow parser On ... beyond 1-best hypothesis Second, as mentioned earlier, the query parser not only provides the search engine “what” and “where” information, but also segments the query to phrases of other concepts...
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Statute Prevents State Agencies From Considering Community Benefits When Granting Tax‑Exempt Status, While the Effects of Purchases and Consolidations on Prices of Care Are Uncertain ppt
... years after the transaction closes To ensure that the purchaser of a nonprofit hospital is adhering to the conditions of consent, the attorney general has required purchasers to submit annual compliance ... review based on a variety of factors Specifically, we considered the Office of the Attorney General’s (attorney general) listing of purchases involving nonprofit hospitals We also considered data ... nonprofit hospital enters into an agreement or transaction to transfer a material amount of assets or control of those assets to another entity, except in certain circumstances Among the factors...
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Báo cáo khoa học: The effects of a-secretase ADAM10 on the proteolysis of neuregulin-1 pot
... C (2008) Effects of neuronspecific ADAM10 modulation in an in vivo model of acute excytotoxic stress Neuroscience 152, 459–468 Nave KA & Salzer JL (2006) Axonal regulation of myelination by neuregulin ... A cysteine-rich isoform of neuregulin controls the level of expression of neuronal nicotinic receptor channels during synaptogenesis Neuron 20, 255–270 13 Huang YZ, Won S, Ali DW, Wang Q, Tanowitz ... Neuregulin isoforms in dorsal root ganglion neurons: effects of the cytoplasmic domain on localization and membrane shedding of Nrg-1 type I J Neurosci Res 84, 1–12 34 Hu X, Hicks CW, He W, Wong P,...
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Báo cáo khoa học: Multiple effects of DiS-C3(5) on mitochondrial structure and function pot
... recovery to the same level as found for the nontreated control mitochondria The protective effects of DiS-C3(5) at a low concentration on the spontaneous induction of mitochondrial PT was also confirmed ... actions were observed, depending on the concentration The addition of DiS-C3(5) £ 10 lM caused deceleration of mitochondrial oxygen consumption but > 20 lM caused acceleration These actions of ... oxygen consumption by DiS-C3(5) was expected to be due to the induction of mitochondrial PT To validate this interpretation, we further characterized the actions of DiS-C3(5) on the mitochondrial...
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Báo cáo khoa học: Differential effects of histone deacetylase inhibitors on phorbol ester- and TGF-b1 induced murine tissue inhibitor of metalloproteinases-1 gene expression docx
... obvious effect on basal expression of Timp-1, only on induced gene expression In conclusion, this is to our knowledge, the only described instance of HDAC inhibitors having opposite effects on the same ... effect on either the acetylation of a transcription factor, or recruitment of repressive factors to acetyl–histones via bromodomain interactions could be envisaged In support of the latter notion ... superinduction of PMA-induced Timp-1 in c-Jun– ⁄ – cells is that the expression of one or more HDACs is c-Jundependent To test this, we monitored the expression of HDACs 1–11 in response to TGF-b1...
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Báo cáo khoa học: Neuroprotective effects of naturally occurring polyphenols on quinolinic acid-induced excitotoxicity in human neurons ppt
... Over-activation of PARP-1 can lead to the depletion of intracellular NAD+ and ATP stores, leading to a number of deleterious processes, including mitochondrial permeability [12], overproduction of superoxide ... Numeration of fluorescence intensity of PAR in human neurons using immunocytochemistry The histogram shows the percentage of human neurons expressing PAR relative to the total number of neuronal ... protect human neurons from QUIN-induced excitotoxicity [7] However, long-term NMDA receptor inhibition by MK-801 has previously been shown to be toxic to cultures of rat cortical neurons [36] Alternatively,...
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Remedying Hyperopia: The Effects of Self- Control Regret on Consumer Behavior pptx
... Effects of Judging Others’ Regret on Personal Choice Method Ninety-one respondents (train station travelers) were randomly assigned to one of three conditions: (1) a near-past choice condition ... Effect of a Delay Between Choice and Consumption on Consumption Enjoyment,” Journal of Consumer Research, 31 (3), 502–510 Ofir, Chezy and Itamar Simonson (2007), “The Effect of Stating Expectations ... explanations, involving factors such as errors of commission versus omission (action versus inactions) and conversational norms Figure presents an outline of our conceptual framework 677 Figure THE EFFECTS...
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