extraction and characterization of dissolved organic matter

... Biodegradation; Dissolved organic matter; DOC 1 Introduction In the past 10 years, much progress has been made in the understanding of dissolvedorganic matter (DOM) functions and dynamics in ... degradation of organic matter by microorganisms, then DOM should play akey role in the stabilisation and destabilisation of soil organic matter, and thus, in Cdynamics and C pools of soils.Sollins ... model of SOMstabilisation and destabilisation for which they differentiate between three general sets ofcharacteristics affecting the stability of organic matter: recalcitrance, interactions andaccessibility...

Ngày tải lên: 15/03/2014, 23:22

... FOULING AND ACCUMULATION OF DISSOLVED ORGANIC MATTER IN MEMBRANE BIOREACTORS LIANG SHUANG NATIONAL UNIVERSITY OF SINGAPORE 2007 FOULING AND ACCUMULATION OF DISSOLVED ORGANIC MATTER IN MEMBRANE ... isolation and fractionation of dissolved organic carbon from natural waters and wastewaters Environ Sci Technol 15, 578-587 Leenheer, J.A and Croué, J.P (2003) Characterizing dissolved aquatic organic ... models, and functions 273, 19-30 Mackey, E.D (1999) Fouling of ultrafiltration and nanofiltration membranes by dissolved organic matter Dissertation, Rice University, USA Madaeni, S.S., Fane, A.G and...

Ngày tải lên: 14/09/2015, 11:16

... Journal of Water and Environment Technology, Vol.1, No.2, 2003 - 247 - Effect of dissolved organic matter (DOM) and biofilm on the adsorption capacity of powdered activated carbon ... other dissolved organic matters (DOM) and biofilm attached onto PAC. However, it is not clear that the effect of DOM and biofilm attached onto PAC were decrease in adsorption capacity of PAC ... 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. 2. Materials and methods 2.1. Operation of powdered...

Ngày tải lên: 05/09/2013, 08:40

... discussion forum of Biogeosciences Input and output of dissolved organic and inorganic nitrogen in subtropical forests of South China under high air pollution Y T Fang1, P Gundersen2, J M Mo1, and W X ... little is known about the fate and effects elevated N deposition in warm and humid forests Here we report the concen-trations and fluxes of dissolved inorganic (DIN) and organic N (DON) in precipitation, ... 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 were...

Ngày tải lên: 23/03/2014, 00:20

... degrees of acet-ylation depending on their sources of origin and mode of isolation The average degree of acetylation (DA) of chitin samples was deter-mined from data of elemental analysis and is ... Isolation and characterization of nutrients and value-added products from snow crab (Chinoecetes opilio) and shrimp (Pandalus borealis) processing discards Journal of Agricultural and Food Chemistry, ... composition of the chitosan samples The average values of DDA% reported in this article are average of the three methods 3.3.2 Kinetics of deacetylation Figs 9 and 10show the results of deacetylation of...

Ngày tải lên: 25/08/2016, 11:21

... occur Storage of SOC is a balance between C additions from nonharvested portions of crops and organic amendments, and C losses, primarily through organic matter decomposition and release of respired ... change of - 0.31 ±0.03 kg of C m-2 in T1, 8.81 to 8.75 kg of Cm-2 represented a change of -0.06 ±0.05 kg of C m-2 in T4, and 5.92 to 5.22 of C m-2 represented a change of -0.70 ±0.09 kg of C m-2 ... permafrost and peat lands (Jobbagy and Jackson, 2000; Zimov et al., 2006) In this review paper we sought to evaluate the impact of conservation tillage on storage and turnover of natural organic matter...

Ngày tải lên: 09/01/2020, 17:33

... potential of TDMPI as a function of pH 52Figure 3.12: Variation of zeta potential of TDMPI in the presence of 0.005M (a) and 0.01 M (b) salt as a function of pH 53Figure 3.13: Viscosities of different ... progressively and discarded as waste (Swatland, 2012; Peng et al, 2013).Since the production of sashimi and sushi demands a prime quality raw material of tuna, any deviations from specified quality standards ... 4°C and pH 4.5, 5.5 or 6.5, with protein recoveries of about 92% which represented an average of 60% of original skipjack flesh, and around 50% of the initial solids The maximum protein extraction...

Ngày tải lên: 25/01/2021, 23:27

... potential of TDMPI as a function of pH 52Figure 3.12: Variation of zeta potential of TDMPI in the presence of 0.005M (a) and 0.01 M (b) salt as a function of pH 53Figure 3.13: Viscosities of different ... progressively and discarded as waste (Swatland, 2012; Peng et al, 2013).Since the production of sashimi and sushi demands a prime quality raw material of tuna, any deviations from specified quality standards ... 4°C and pH 4.5, 5.5 or 6.5, with protein recoveries of about 92% which represented an average of 60% of original skipjack flesh, and around 50% of the initial solids The maximum protein extraction...

Ngày tải lên: 17/02/2021, 21:05

... potential of TDMPI as a function of pH 52Figure 3.12: Variation of zeta potential of TDMPI in the presence of 0.005M (a) and 0.01 M (b) salt as a function of pH 53Figure 3.13: Viscosities of different ... progressively and discarded as waste (Swatland, 2012; Peng et al, 2013).Since the production of sashimi and sushi demands a prime quality raw material of tuna, any deviations from specified quality standards ... 4°C and pH 4.5, 5.5 or 6.5, with protein recoveries of about 92% which represented an average of 60% of original skipjack flesh, and around 50% of the initial solids The maximum protein extraction...

Ngày tải lên: 17/05/2021, 14:16

... formation of suspected carcinogenic disinfection by-products (DBPs), which occurs as a result of reactions be-tween dissolved organic matter (i.e DOM, the com-ponents of natural organic matter passing ... hy-drophilic acids and various hydrocarbons (Thurman, Trang 31985) Central to understanding how to controlDBPs is a knowledge of the abundance and struc-ture of DOM components and how they relate ... following paragraphs A wide of range of SUVA280 values, from 2 to 6 and 0.5 to 2, was observed within the UF fractions of MB-B and TM-B waters, respectively The SUVA value of a particular MW fraction...

Ngày tải lên: 20/10/2022, 14:08

... equilibration time, temperature and organic matter J Environ Qual 1999;28:1742 – 50. Andersson S, Nilsson SI, Saetre P Leaching of dissolved organic carbon (DOC) and dissolved organic nitrogen (DON) in ... affected by pH and solid and dis-solved 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 ... reduced the mobility of Cd caused by organic matter (Almas et al., 1999) Jordan et al (1997) examined the increased mobility of Pb in the presence of natural organic matter in a sandy soil They found...

Ngày tải lên: 15/03/2014, 23:22

... ecosystems. Streams and rivers are regarded as global hotspots of organic-matter processing and CO2 evasion1,2 The stre-ambed and its biofilm microbiomes drive fundamental ecosystem processes and biogeochemical ... fluorescence components, HS and HS231, were also identified Figure 1 Concentrations of dissolved organic carbon (DOC) of the control sites, effluents and downstream of the aquacultures of the four sampling ... production of planktonic (E) and biofilm bacteria (F) at control sites and downstream of the aquacultures at the four sampling sites Production of biofilm bacteria as a function of the fluorescence...

Ngày tải lên: 04/12/2022, 14:57

... such as dissolved organic matter Introduction Carbohydrates are a major component of the dissolved organic matter (DOM) in marine environments and account for about 20% of dissolved organic ... J.I.HEDGES, and P.G.HATCHER 1992 Bulk chemical characteristics of dissolved organic-matter in the ocean Science 255: 1561-1564 produced dissolved organic matter Mar Chem 63: 131-144 BOUVIER,T.C., and ... assemblages of marine proteobacteria and members of the Cytophaga-Flavobacter cluster consuming low- and high- molecular-weight dissolved organic matter Appl Environ Microbiol 66: 1692-1697 export and...

Ngày tải lên: 02/10/2024, 01:32

... removal of ibuprofen was dependent on the total oxidation capacity in the system With the known rate constants of NOM and reaction rate of organic compounds with O3 and · the removal of organic ... Y., Characterization of isolated fractions of dissolved organic matter from natural waters and a wastewater effluent Water Res 2001, 35 (4), 985-996 54 Kim, M H.; Yu, M J., Characterization of ... the removal of organic contaminants of < 20 s Current investigation only focuses on ibuprofen, an · OH-reactive organic compound The degradation of both · OH- and ozone-reactive organic 88 compounds...

Ngày tải lên: 09/09/2015, 10:08

... (p-doping) and (b) reduction (n-doping) processes of the carbazole groups and Eu complex Figure 3.8: Effect of read cycles on the ON state and OFF state 75 Figure 3.9: Ratio of the ON- to OFF-state ... flexibility, and most important of all, ease of processing [3] Before discussing the advantages of organic devices, the following section will give a preview of conventional memory technology and its ... technologies include dynamic random-access memory (DRAM), static random-access memory (SRAM), and flash memory (NAND and NOR) DRAM is a random access memory that stores each bit of data in a separate...

Ngày tải lên: 12/09/2015, 11:29

... ACADEMY OF SCIENCE AND TECHNOLOGYGRADUATE UNIVERSITY OF SCIENCE AND TECHNOLOGY ORGANIC CORROSION PROTECTION COATING Major: Theoretical chemistry and Physical chemistry Code: 9440119 SUMMARY OF ... University of Science and Technology - Vietnam Academy of Science and Technology 1 Assoc Prof Dr., To Thi Xuan Hang 2 Assoc Prof Dr Dinh Thi Mai Thanh The thesis can be found at: - Library of Graduate ... similar trend, included characteristic bands of SiO2 (~471, 794 and 1080 cm-1) and PPy (~1530, 1450, 1405 and 1050 cm-1) EDX results of SiO2/PPy-W, SiO2/PPy-E and SiO2/PPy-EW are shown in figure...

Ngày tải lên: 10/01/2020, 06:36

... weight of the soaked/wet membrane, Wd= weight of the dry membrane, A = area of the membrane, L = thick-ness of the membrane and qw= density of water Thickness and swelling The thickness of the ... analysis (I) survey of theory and application J Chem Edu 1959;36:555–64. [16] Khan AA, Alam MM Synthesis, characterization and analytical applications of a new and novel ‘organic–inorganic’ composite ... Khan et al.[12] Synthesis of Sn(IV) tungstate The method of preparation of the inorganic precipitate of Sn(IV) tungstate ion-exchanger was very similar to that of Alberti and Constantino[13], with...

Ngày tải lên: 13/01/2020, 04:14

... ACADEMY OF SCIENCE AND TECHNOLOGYGRADUATE UNIVERSITY OF SCIENCE AND TECHNOLOGY ORGANIC CORROSION PROTECTION COATING Major: Theoretical chemistry and Physical chemistry Code: 9440119 SUMMARY OF ... University of Science and Technology - Vietnam Academy of Science and Technology 1 Assoc Prof Dr., To Thi Xuan Hang 2 Assoc Prof Dr Dinh Thi Mai Thanh The thesis can be found at: - Library of Graduate ... similar trend, included characteristic bands of SiO2 (~471, 794 and 1080 cm-1) and PPy (~1530, 1450, 1405 and 1050 cm-1) EDX results of SiO2/PPy-W, SiO2/PPy-E and SiO2/PPy-EW are shown in figure...

Ngày tải lên: 17/01/2020, 00:49

... Trang 1ISOLATION AND CHARACTERIZATION OF XANTHOMONAS AXONOPODIS CAUSING CANKER DISEASE OF LIME TREE AND EVALUATION OF ABILITY OF EXTRACTION FROM STEM OF EUPHORBIA TIRUCALLI AGAINST ... approximately) and 0.1 mLof this culture was spread on NA plates Wells of 5.0 mm diameter were punched in to the agar medium and were filled 60 µL of extracts Stem E tirucalli extracts were dissolved ... RESULTS AND DISCUSION 3.1 Isolation and identification of bacteria The samples of infected leaves and fruits were placed on Nutrient Agar plates The bacterial colonies appeared after 48 hours of...

Ngày tải lên: 09/01/2021, 17:57

... metabolism and photochemistry are arguably two of the most important biogeochemical pathways for transforming organic matter in the surface oceans (HANSELl and CARLSOn, 2002) and are often inter-dependent ... composition of marine DOM to produce signatures that are characteristic of different Trang 31 INTRODUCTIONDissolved organic material (DOM) is the most heterogeneous and dynamic pool of carbon in ... 1989) and thus stimulate bacterial growth (MOPPEr and KIEBEr, 2002) Photochemistry can also inhibit Trang 6the microbial consumption of algal-derived DOM (BENNEr and BIDDANDa, 1998; TRANVIk and...

Ngày tải lên: 20/10/2022, 04:29