dissolved organic carbon exports in rivers and streams
Báo cáo khoa học: "Organic matter dynamics in beech and pine stands of mountainous Mediterranean climate" docx
Ngày tải lên :
08/08/2014, 14:21
... [41]Rodin L.E., Bazilevich N.I., Production and mineral in terrestrial 1967, 288 pp cycling vegetation, Oliver and Boyd, Edinburgh, [46] Singh K.P., Litter production and nutrient turnover in deciduous ... con- siderably in depth, clay contents increasing with depth and is classified as Humic Acrisol [12] These and other soil characteristics are indicated in table III pine trees (Pinus sylvestris ... in the lower classes and no sampling in the upper classes The references found in the literature report conflicting data, depending on the forest species studied, the age of the stand, the kind...
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A study on the formation of bed forms in rivers and coastal waters
Ngày tải lên :
11/09/2015, 09:11
... sand banks and sand ridges, including their origin, classification and modeling in continental shelf seas Among all types of natural sandy bed forms, dunes in alluvial rivers and sand waves in ... in fully shearing grain motion in water and about φ m = 26 o in partially shearing grain motion In his study on avalanching of granular solids on slopes, Allen (1970) measures the “angle of initial ... dunes and sand waves are explored by using a linear instability analysis approach The effects of wind waves on sand wave formation are investigated by means of a wave-current interaction model In...
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Effect of dissolved organic matter (DOM) and biofilm on the adsorption capacity of powdered activated carbon in activated sludge
Ngày tải lên :
05/09/2013, 08:40
... tion 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 ... acid-water/acetonitrile in a 40/60 ratio, and flow rate of 0.8 ml/min (Barbeni et al., 1987) MLSS was determined following to the Standard Methods for Examination of Water and Wastewater (APHA, ... 3,5-DCP concentrations in the PACT and the control reactors during and after the shock loading of 3,5-DCP The peak concentration in the PACT and the control reactors were 6.0 and 45.3 mg l-1, respectively...
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Controls of bioavailability and biodegradability of dissolved organic matter in soils
Ngày tải lên :
15/03/2014, 23:22
... 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, ... bacterial interaction on beech leaves: influence on decomposition and dissolved organic carbon quality Soil Biol Biochem 31, 367 – 374 Moore, T.R., 1997 Dissolved organic carbon: sources, sinks, and ... bacterial inocula for measuring the biodegradable dissolved organic carbon (BDOC) in waters Water Res 26, 481 – 486 Boissier, J.M., Fontvieille, D., 1993 Biodegradable dissolved organic carbon in seepage...
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Input and output of dissolved organic and inorganic nitrogen in subtropical forests of South China under high air pollution docx
Ngày tải lên :
23/03/2014, 00:20
... deposition and DIN leaching simultaneously occurred in the rainy season (March to August) and monthly DIN concentrations and fluxes in leaching were positively related to those in throughfall in all ... demand in the young aggrading forests, albeit intensive rain in the growing season is likely to enhance N leaching in these forests BGD 4, 4135–4171, 2007 Introduction 10 15 20 25 Increases in ... leaching and monthly throughfall input for DIN Figure Relationships mixed monthly solution leaching and DHSBR of southern China (a) (a) and DON (b) in the pine, between and old-growth forests inmonthly...
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Fouling and accumulation of dissolved organic matter in membrane bioreactors
Ngày tải lên :
14/09/2015, 11:16
... in which DOM is characterized in water and its inorganic constituents, and studies of DOM fractions isolated from water and inorganic constituents (Leenheer and Croué, 2003) 2.3.1 DOM Profiling ... 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 in the effluent during MBR operation ... 2.2.1.2 Dissolved Organic Matter Dissolved macromolecules, on the other hand, impact both on internal and external fouling, the latter being promoted by concentration polarization and solute-solid interactions...
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Biological Alteration of Zinc Complexation Characteristics of Dissolved Organic Matter in Domestic Wastewater Treatment Plant Effluent under River Water Environment
Ngày tải lên :
05/09/2013, 10:15
... seems to fit into two linear portions indicating two classes of binding sites In contrast, DOMs in the samples after and weeks fitted to a single line, signifying only one type of binding site It ... then linearly transformed using the Scatchard equation, as explained in Chaminda et al (2010) and in the Appendix of this paper RESULTS AND DISCUSSION Biodegradability of zinc binding sites in river ... dissociating metal, including free metal ion, inorganic complexed metal and some weak organic complexed metals Although the relationship between the free ion, [M2+], and [M'] can be determined for inorganic...
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Characterization of the Carbon Stable Isotope Ratio and Fatty Acid Structure of Zostera japonica in Coastal Areas
Ngày tải lên :
05/09/2013, 10:17
... 18:2n6c and LCFAs were contained in greater amounts in the roots and rhizomes than in the leaves and stems, and 18:3n3 was contained in lesser amounts in the roots and rhizomes than in the leaves and ... shown in Table and Fig.1 The water temperatures were HK NG MG KT KG Fig - Sampling sites for seagrasses Table Sampling conditions and cooperating institutions during sampling Table - Sampling conditions ... Z.marina RR LS -14 -13 -12 -11 -10 -9 -8 δ13C（‰） Fig.2 Comparison of δ Z in Z japonica Fig - Comparison of δ13C in 13C japonica and Z marina and Z marina LS: leaves and stems LS: leaves and stems...
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Influence of Phosphorus Concentration on the Biodegradation of Dissolved Organic Matter in Lake Biwa, Japan
Ngày tải lên :
05/09/2013, 10:17
... dissolved organic matter (DOM) is pointed out (Imai, 2002) On the other hand, Takahashi (1999) reported that dissolved organic carbon (DOC) in 1997 did not increase - 216 - Journal of Water and ... 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, (3) decrease in DOM discharge from the lake, and (4) ... 41, 582-591 (in Japanese) Imai A., Fukushima T., Matsushige K., Inoue T and Ishibashi T (1998) Fractionation of dissolved organic carbon from the waters of Lake Biwa and its inflowing rivers, Jpn...
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Natural remedies for poultry diseases common in ‘natural’ and ‘organic’ flocks potx
Ngày tải lên :
08/03/2014, 09:20
... selected for its ability to maintain the balance of intestinal microflora It is said to neutralize toxins, bind to pathogenic bacteria, and reinforce intestinal wall integrity which allows animals ... prevent intestinal worm and parasite infestations Regular addition of garlic into the drinking water is said to control intestinal worms Garlic is said to be especially effective when used in conjunction ... Mills Inc are produced by fermenting selected liquid and cereal grain raw ingredients with bakers yeast and drying the entire culture-media without destroying the yeast factors, B-vitamins and...
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DETERMINATION OF VOLATILE ORGANIC COMPOUNDS (VOC) IN CONSUMER PRODUCTS AND REACTIVE ORGANIC COMPOUNDS IN AEROSOL COATING PRODUCTS doc
Ngày tải lên :
14/03/2014, 20:20
... determining the percent by weight of the individual ingredients in aerosol coating products, the precision and accuracy of the determination for each ingredient is governed by the precision and ... portion, excluding container and packaging = weight (gm) of exempt compounds in propellant For aerosol products containing LVP-VOC, the percent VOC shall be calculated using the following equation: ... COATING PRODUCTS This section specifies the procedure for determining the percent by weight of the reactive organic compounds contained in aerosol coating products, for the purpose of determining...
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USEPA REGION 9 TECHNICAL GUIDELINES FOR ACCURATELY DETERMINING VOLATILE ORGANIC COMPOUND (VOC) CONCENTRATIONS IN SOIL AND SOLID MATRICES potx
Ngày tải lên :
14/03/2014, 20:20
... sampled and analyzed These guidelines address methods for: (1) handling of samples as intact soil cores; (2) preserving samples; (3) storing samples in hermetically sealed containers; and (4) minimizing ... guidelines for measuring VOC concentrations in soil and other solid matrices include the following: Samples should be handled as intact soil cores until being transferred into methanol or into ... Volatile Organic Compounds in Soil Subsamples US Army Cold Regions Research and Engineering Laboratory, Special Report 95-5 Hewitt, A.D and J.E Lukash (1996) Obtaining and Transferring Soils for In- Vial...
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Báo cáo khoa học: Modeling hydration mechanisms of enzymes in nonpolar and polar organic solvents potx
Ngày tải lên :
16/03/2014, 10:20
... more complete understanding of the structural properties of this enzyme in organic solvents is shown in Fig Cutinase was simulated in five different organic solvents of increasing dielectric constant ... 13 Halling PJ (1990) High-affinity binding of water by proteins is similar in air and in organic solvents Biochim Biophys Acta 1040, 225–228 14 Yang PH & Rupley JA (1979) Protein–water interactions ... centered on polar regions of the protein surface that increase in size and number as water is added Protein–water adsorption isotherms in organic solvents and in the gas phase [13] have shown that,...
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ALDEHYDE AND OTHER VOLATILE ORGANIC CHEMICAL EMISSIONS IN FOUR FEMA TEMPORARY HOUSING UNITS – FINAL REPORT pdf
Ngày tải lên :
22/03/2014, 14:20
... vinyl textured white vinyl finish with finish with unfinished veneer unfinished veneer backing backing vinyl laminant with vinyl laminant with unfinished veneer unfinished veneer backing backing ... Coverings and Finishes on Tested Materials Material ceiling wall sub floor carpet vinyl floor cabinet wall cabinet wall thick Dutchmen textured white vinyl finish with unfinished veneer backing vinyl ... materials using bonding, coating, or surface finishing systems containing formaldehyde when installed in manufactured homes (Turner et al 1996) The standard is embodied in the HUD Standard 24 CFR...
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Monitoring and assessing processes of organic chemicals removal in constructed wetlands doc
Ngày tải lên :
28/03/2014, 19:20
... structure and function of these various wetland communities In turn, an increased understanding of the intrinsic contaminant transformation processes would help supporting the development of organic ... Remediating chlorinated solvents in wetlands: Natural processes or an active approach? In: Nehring, K.W., Brauning, S.E (Eds.), Wetlands and Remediation II Proceedings of the Second International ... naturally occurring organic matter DAngelo and Reddy (1999) showed that, amongst the relevant soil factors regulating potential rates and modes of organic carbon mineralization in wetland soils, electron...
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Báo cáo hóa học: " Influence of grazing and precipitation on ecosystem carbon cycling in a mixed-grass prairie" potx
Ngày tải lên :
20/06/2014, 23:20
... grazing intensity in grassland carbon cycling (e.g., Risch and Frank 2006) However, we did find interactive effects of grazing intensity × pastures and years on ecosystem carbon fluxes Chimner and ... snow and summer rain influence ecosystem carbon cycling in a mixed-grass prairie, Wyoming, USA Ecohydrology Derner, JD, and RD Hart 2007 Grazing induced modifications to peak standing crop in northern ... rates in the U.S Great Plains Ecology 83:320–327 Fay, PA, JD Carlisle, AK Knapp, JM Blair, and SL Collins 2000 Altering rainfall timing and quantity in a mesic grassland ecosystem: Design and performance...
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Báo cáo hóa học: " FTIR and Raman Spectroscopy of Carbon Nanoparticles in SiO2, ZnO and NiO Matrices" pdf
Ngày tải lên :
22/06/2014, 01:20
... different results: extremely high scattering intensity and an increasing background intensity as the Raman shift increases Due to the increasing background intensity, the phonon confinement model ... an indication of the phonon confinement in nanoclusters of carbon within the ZnO matrix for C–NiO and C–ZnO samples are similar except that intensity is higher in ZnO than NiO It is interesting ... these carbon clusters is large However, asymmetry in the G peak was observed in all samples indicating that the nano -carbon is graphitic in structure In Figs 5–7, we have re-drawn the G peak in...
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ADVANCES IN INDUCTION AND MICROWAVE HEATING OF MINERAL AND ORGANIC MATERIALS docx
Ngày tải lên :
29/06/2014, 13:20
... keep providing us motivation to the reseraches on understanding and application of the MW heating 4 Advances in Induction and Microwave Heating of Mineral and Organic Materials This INTEK book ... in Induction and Microwave Heating of Mineral and Organic Materials Fe3O4 powder of 4N in purity, which were compressed uniaxially and formed into a rod having 7mm in diameter and 4~0.5mm in ... heating of mineral and organic materials Beginning with industry application in many areas of practical application to mineral materials and ending with raw materials of agriculture origin the...
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