trace organic moieties of dissolved organic material in natural waters
Tài liệu Báo cáo khoa học: "The Use of Ooject-Special Knowledge in Natural Language Processing" doc
... of active tokens (a part of snort term memory) for any containers that might b e expected to contain the substance moved, in this case wine This is done by applying two tests to the objects In ... enabling relation exists between the two actions (opening the bottle and pouring the wine) In fact, a long causal cnaJn may Oe required to connect the two acts, with an enaClement link being only ... k i n d of were d e s i g n e d to this particular bottle is then marked as being a SOURCE of that oCject The description of this particular bottle as a SOURCE of wine Is equivalent, in Object...
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Aquatic chemical kinetics reaction rates of processes in natural waters
... achieved in recent years in the study of kinetics of the dissolution of oxide and carbonate minerals and the weathering of minerals Finally, we demonstrate in discussions on weathering rates in the ... buildup of B in the lake The foregoing examples have examined the dynamics of a CSTR model lake Inllowing a single addition of pollutant We will now examine results from a '''l'lIdy continuous input ... be Nlilprising that chemical kinetics is an integral component of models natural Nystellls, Intrinsically "kinetic" questions concerning the nature and behavior of IIlIt IIlal systems include:...
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ENVIRONMENTAL IMPACT OF HEAVY METAL POLLUTION IN NATURAL AQUATIC SYSTEMS ppt
... discharged in to the seawater A comparison of the leaching of metals from tailings of two base-metal mines, a zinc-lead mine on the west-central coast of Greenland and a copper mine on the west coast of ... biogenous origin may contain heavy metals within inorganic skeletal materials, complexed to organic matter, and in coatings of hydrous oxides which may form on particles A third class of sedimentary ... uptake Some of the metals may be scavenged by particulate material in the water and deposited in the sediments Metals present in runoff waters in particulate form, arising from erosion of mineralized...
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Review of the Existing Techniques for the Determination of Dry Rubber Content in Natural potx
... containing grayish yellow gelatinous sediments by ultra centrifuqatiorr" The serum contains most of the soluble substances including amino acids, proteins, carbohydrates, organic acids, inorganic ... discussion of the results are included in chapter five of this thesis Finally, in chapter six the summary and general conclusions of the work including scope for doing further work in the area are incorporated ... ORC of latex by measuring the capacitance of latex using capacitive techniques 1.6: Shortcomings of the existing methods Rapid determination of ORC is very important for commercial exchange of natural...
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Báo cáo lâm nghiệp: "Effects of the clear-cutting of a Douglas-fir plantation (Pseudotsuga menziesii F.) on the chemical composition of soil solutions and on the leaching of DOC and ions in drainage waters" pps
... L1 required a charge of àmolc per mg of C, which is in agreement with the literature indicating values ranging from to 10 àmolc per mg of C [61] Anions in rainfall were dominated by SO2 (62 àmolc ... clear-cutting After clear-cutting Before clear-cutting After clear-cutting Before clear-cutting After clear-cutting Before clear-cutting After clear-cutting Before clear-cutting After clear-cutting ... clear-cutting After clear-cutting Before clear-cutting After clear-cutting before clear-cutting After clear-cutting Before clear-cutting After clear-cutting Before clear-cutting After clear-cutting...
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Báo cáo khoa học: "Impact of insects damaging seed cones of cypress, Cupressus sempervirens, in natural stands and plantations of southeastern Europe" pptx
... dominated the pest complex in 13 of the stands, and destroyed up to 98 % of the cones during the growth period in Eleousa (Rhodes) T juniperinus was the most damaging pest of the complex in three ... ± P ± 0.010), indicating mostly on filled seeds = 3.4 Influence of insects on the potential of regeneration of C sempervirens The 1994-1995 life table of several cohorts of cones in four Greek ... the remainder of the 2nd year of development in both years and locations The limited decrease in the number of cones of that age resulted mainly from feeding by P tessulatana larvae of the second...
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báo cáo khoa học: "Variability of eye colour mutations in natural of Drosophila melanogaster" pdf
... spring collections (0.1869 in cellar, 0.1254 in vineyard and 0.1549 in pine-wood), the number of loci used (48 in cellar, 27 in vineyard and 34 in pine-wood) and the number of generations between ... means of five different indexes were small and similar in all cases, independently of the index used, being a little larger in autumn than is spring Assuming that the number of different loci reported ... inside a cellar in Requena (Valencia, Spain), two in a vineyard in El Pont6n (4 km away from the cellar) and the last two in a semi-built-up pine-wood at La Canada (70 km away from Requena) In...
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Báo cáo y học: "Community transcriptomics reveals universal patterns of protein sequence conservation in natural microbial communities" pdf
... being involved in 61% of all decreasing DNA-RNA amino acid frequency changes In contrast, frequency increases were dominated by amino acids enriched in GC: 50% of increases involved amino acids with ... metatranscriptomic amino acid sequence pools in marine microbial communities Indeed, of 240 comparisons of amino acid proportions in DNA versus RNA datasets (12 DNA/RNA samples × 20 amino acids), 227 (95%) involved ... protein-coding genes in the sequenced reference genome of each taxon cSister taxon used for identification of core genome (see main text) dPercentage of core is the percentage of protein-coding...
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Báo cáo y học: "Mixture modeling of transcript abundance classes in natural populations" ppsx
... histograms in bins of increasing order of magnitude of significance, with number of genes indicated on the y-axis (a) The distribution of significance measures (negative logarithm of the P value) ... be found in a higher than expected incidence of sharing of TACs across lines Because it is not trivial to estimate the expected proportion of sharing for abundance classes of hundreds of transcripts ... range of minor TAC frequencies (Figure 5a) Whereas 30 lines is insufficient for a minor proportion of 0.05, 80% detection rate is achieved for a twofold difference in magnitude between the minor...
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Recovery of antibiotic resistance genes in natural environments
... most plasmid had bands of fragments, which are indication of a right insert The remaining lanes showed only single bands these may due to the size of insert equals to the size of vector or the vector ... immediately under step of extraction of total DNA or stored under – 80oC for later use Determination of MIC (Minimal Inhibition Concentration) of E.coli DH5a/pUC19 Minimum inhibitory concentrations ... canal in Ho Chi Minh city For screening antibiotic resistant E.coli strains bearing recombinant pUC19 plasmids, common antibiotics such as gentamicin, tetracycline, chloramphenicol, streptomycin...
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Effect of dissolved organic matter (DOM) and biofilm on the adsorption capacity of powdered activated carbon in activated sludge
... washing solution was separated from PAC by centrifugation (8,000 rpm, 20 minutes) to determine was determined as the amount of biofilm developed on PAC The amount of organic carbon in washing ... New tion ba ba bat bat incu incu incu incu 1st 2nd 3rd 4th Figure Change in amount of organic carbon on PAC for every incubation by glucose According to Sutherland (2001), extracellular polymers ... 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 after each incubation...
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Occurrence of Polyhydroxyalkanoate as Temporal Carbon Storage Material in Activated Sludge during The Removal of Organic Pollutants
... occurrence of temporal carbon storage material, PHA, was confirmed in the course of wastewater treatment at the five continuous and two sequencing batch reactors in Beijing University of Technology ... increased at 12°C per minutes to 220°C and maintained for - 78 - Journal of Water and Environment Technology, Vol 6, No.2, 2008 minutes The injection volume was 1µL with a split ratio of around 1:20 ... value, was calculated as the amount of PHA increased during the anaerobic phase divided by the amount of carbon supplied as influent in one cycle For continuous reactors, CRP value was calculated...
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Biological Alteration of Zinc Complexation Characteristics of Dissolved Organic Matter in Domestic Wastewater Treatment Plant Effluent under River Water Environment
... Biodegradability of zinc binding sites in river water DOM Fig represents the variation of DOC, UV254 and SUVA during the river water incubation for weeks in the preliminary study During the first days of incubation, ... shown in Fig and Table 1, Zn titration data obtained for DOM in the original river water sample seems to fit into two linear portions indicating two classes of binding sites In contrast, DOMs in ... two weeks Biodegradability of zinc binding sites in DOM of WWTP effluent in river water Fig shows the variation of DOC, UV254 and SUVA during the incubation of DOM in WWTP effluent with river...
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Influence of Phosphorus Concentration on the Biodegradation of Dissolved Organic Matter in Lake Biwa, Japan
... viewpoint of mass balance, the four possible pathways to increase DOM in the lake are as follows: (1) increase in the DOM loading from the watershed, (2) increase in internal production of DOM, ... of dissolved organic carbon from the waters of Lake Biwa and its inflowing rivers, Jpn J Limnol., 59, 53-68 (in Japanese) Imai A (2002) Accumulation of recalcitrant dissolved organic matter in ... Behavior of organic matter in Lake Biwa, Annual Rep Lake Biwa Res Inst., 22, 161-170 (in Japanese) Hayakawa K and Takahashi M (2002) Behavior of dissolved organic matter in the northern basin of Lake...
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Controls of bioavailability and biodegradability of dissolved organic matter in soils
... 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 Today, ... thus indicating some physical protection in less-accessible pores Since 71 –82% of DOM was obtained in the batch extracts, DOM conservation in the smallest pores may be of major importance in soils ... Relationship between initial UV absorbance and degradation of DOC after days of incubation (b) Relationship between the change in UV absorbance during incubation and the degradation of DOC binding to aromatic...
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Input and output of dissolved organic and inorganic nitrogen in subtropical forests of South China under high air pollution docx
... similar dissolved inorganic N (DIN) deposition in bulk precipitation in 2004 (Fang et al., 2007) Here we have continued these measurements but including also analysis of dissolved organic N (DON) input ... increase of about 50% in the tropospheric column amount of NO2 over south China using the satellite instruments In addition to the DIN input, a surprisingly high DON input of 17.8 N ha−1 yr−1 in precipitation ... measured in precipitation Dry deposition was of minor importance at the site A canopy uptake of DIN was indicated in two young conifer dominated forests (72–85% of DIN input reached the floor in throughfall),...
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Fouling and accumulation of dissolved organic matter in membrane bioreactors
... concern in water and wastewater treatment systems In drinking water production, DOM is identified to be the main cause of fouling during microfiltration/ultrafiltration of surface water, resulting in ... composition of the adsorbed material on /in the membrane was very close to that of the DOM in the MBR system, indicating that DOM was the dominant foulant It was suggested that internal fouling caused ... detailed insights into the DOM fouling phenomenon in MBR systems In addition, despite the great importance of DOM fouling, it has not been seriously taken into account in the models for fouling development...
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Tài liệu Organic matter distribution of the root zone in a constructed subsuface flow wetland pptx
... OM - organic matters in present (%); - weight of cup (gr); Mc Ms - weight of dried sand sample (gr) by drying at 110 °C in hours; Msc - weight of sand and cup after combusting at 550 °C in hours ... OM trend lines in the sand bed Figure gives the distribution of OM in terms of interpolated contour graphics at three depths 20 cm, 50 cm and 80 cm The differences in distribution of OM contents ... a better understanding of the inner of a CSFW in Can Tho University Secondly, the survey can be translated a new insight to adjusted design parameter of constructed wetland in tropical countries...
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Tài liệu Risk Characterization, Assessment, and Management of Organic Pollutants in Beneficially Used Residual Products pdf
... the incorporation of multiple conservative assumptions in deterministic risk assessment It is not intended to judge the validity of the assumptions In 1998, the State of Wisconsin began developing ... typically in the range of one in ten thousand to one in one million additional cases A case study from the State of Wisconsin illustrates the effect of multiple conservative assumptions in a deterministic ... sample Each cleanup step is intended to eliminate interfering compounds by using physical or chemical properties that differ between interfering compounds and the analyte of interest The analytical...
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