the contribution of monomers and other low molecular weight compounds to the flux of dissolved organic material in aquatic ecosystems
Transport and fate of persistent toxic organic chemicals in aquatic ecosystems: the Niagara River to St Lawrence River Estuary example pptx
... because there are continuous industrial and municipal inputs Other less volatile PTOCs such as the lower chlorinated PCBs and chlorinated benzenes are however also volatile and released into the ... However, some of this organic content can be in the form of thin organic coatings on the mineral substrates In fact, partitioning of PTOCs onto aquatic particulates may not be so much of a sorption ... reflect these sources and in- lake processes of sediment focusing Lake sediment cores can be analyzed to determine changes in historical inputs of PTOCs and to find out the rate at which these chemicals...
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Influence of Phosphorus Concentration on the Biodegradation of Dissolved Organic Matter in Lake Biwa, Japan
... the 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 ... evaluated the influence of phosphorus concentration on the biodegradation of DOM and discussed the possibility of pathway (4) to happen in the northern basin of Lake Biwa MATERIALS AND METHODS Materials ... of the role of biodegradation activity in the accumulation of CODMn in Lake Biwa Fig - Yearly changes in the estimated DP and k in the northern basin of Lake Biwa where lines show 5-year moving...
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Controls of bioavailability and biodegradability of dissolved organic matter in soils
... which are then used for the biosynthesis of microbial cell materials (2) complete mineralisation to obtain energy and inorganic nutrients Depending on the analytical tools used to monitor the degradation ... different amounts of these fractions, and consequently, the kinetics of the degradation process will be very different Quantification of the contribution of DOM to the stable C pool in the mineral subsoil ... maintenance to achieve reproducible degradation rates (McDowell, personal communication) Other problems of these reactors are the release of DOM into the solution and the adsorption of DOM onto...
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Fouling and accumulation of dissolved organic matter in membrane bioreactors
... kinds of foulants are inherently interrelated as they exist in a single 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 ... 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 ... thesis to either investigate the roles of other components in MBR fouling, or analyze the extremely complex correlations between DOM and other foulants in MBR mixed liquor On the other hand, a lab-scale...
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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 the ... shifted the DOM composition to more biologically recalcitrant compounds in terms of zinc complexation On the other hand, a further examination of the variation of labile Zn during the incubation...
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Báo cáo khóa học: C-, 15N- and 31P-NMR studies of oxidized and reduced low molecular mass thioredoxin reductase and some mutant proteins docx
... structure of avin upon binding to the apoprotein and its specic interactions with the apoprotein In particular, we hoped to further conrm the presence of the FR and FO forms of the enzyme under the ... three rings, and the pyridine nucleotide binding site indicated by PN In the FR conformation, the buried avin is adjacent to the nicotinamide of bound NADPH and the redox active disulde, Cys135 and ... thioredoxin reductase (TrxR), and of the native mutant protein E159Y in the oxidized and reduced states For comparison the chemical shifts of free FAD and those of other members of the class of pyridine...
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báo cáo khoa học: "The potential benefits of low-molecular-weight heparins in cancer patients" ppsx
... molecule plasminogen in response to plasminogen activator or urokinasetype plasminogen activator, and is inhibited by plasminogen activator inhibitor [25] However, deregulation of these factors is ... reduction in VTE incidence [91-93] In the Malignancy and Low Molecular Weight- Heparin Therapy (MALT) trial, cancer patients were randomly assigned to 6-weeks of either the LMWH nadroparin (n = ... medical inpatients, of which 190 had cancer, the use of dalteparin (5,000 IU SC OD) for 14 days reduced the combined incidence of symptomatic and asymptomatic VTE from 4.96% in the placebo group to...
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Báo cáo y học: "Measuring the anticoagulant effect of low molecular weight heparins in the critically ill" pps
... a 10% increase in body weight and the appearance of generalized edema The pharmacokinetics were compared by examining the peak anti-factor Xa heparin level and the area under the anti-factor Xa ... administered medications will be absorbed into the circulation of critically ill patients These observations are important for the design of future studies of both thromboprophylaxis and other interventions ... analysis of the anti-factor Xa heparin levels found after subcutaneous administration of 2500 U dalteparin in a group of critically ill patients In their study, patients with edema were defined by...
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Effect of dissolved organic matter (DOM) and biofilm on the adsorption capacity of powdered activated carbon in activated sludge
... 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 ... reactor was suspended into 495 ml of the glucose medium in an Erlenmyer flask as an inoculum Then, g of PAC was added into the flask and shaken at 120 rpm and 20±0.5 oC After the depletion of ... Figure shows the adsorption isotherm of new PAC, PAC in the aeration tank, and PAC after 1st and 4th incubation The adsorption capacity of PAC decreased with incubation time In other word, the adsorption...
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Báo cáo khoa học: Weak oligomerization of low-molecular-weight protein tyrosine phosphatase is conserved from mammals to bacteria pot
... species which stand in fast equilibrium with the monomer and dimer [15] Dimerization involves the tyrosines of the YY-loop and residues of the active site, leading to an intrinsically inactive species ... described below The theoretical relaxation data of the monomer and the haddock model of the dimer were computed using HydroNMR [49,50], and the dissociation constant of the dimer (Kd), giving the relative ... of phosphorylation However, the structure of the YwlE dimer suggests that the active site of each molecule is occupied by the residues of the other molecule forming the dimer, and therefore the...
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Báo cáo khoa học: Contribution of exofacial thiol groups in the reducing activity of Lactococcus lactis docx
... (A) and (B) are the pH and Eh7 in the experiments with the addition of inhibitor (the arrow indicates the time of addition); curves (C) and (D) are the pH and Eh7 in the control experiment in ... surface of the cytoplasmic membrane [30] The identication of proteins located on the extracellular surface and involved in the decrease in Eh would be of interest for increasing our understanding of ... initial Eh7 of the sterile MRS media Moreover, maximal care was taken in the experiment to avoid introducing oxygen into the ltrate Consequently, the restoration of the initial Eh7 in the ltrate...
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Báo cáo khoa học: Contribution of a central proline in model amphipathic a-helical peptides to self-association, interaction with phospholipids, and antimicrobial mode of action ppt
... addition of the peptides to the liposomes, the entrapped calcein (70 mm) was released into the buffer by lysis This relieves self-quenching of the dye within the liposomes, increasing the fluorescence ... or C-terminus of the peptides into the core of the bilayer In other words, partial conformational flexibility may be a prerequisite for import of the peptides into membranes or the cytosol For ... through the peptidoglycan layer and then kill the target micro-organism by interacting with and permeabilizing the cytoplasmic membrane To further study this hypothesis, we examined the ability of...
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Báo cáo lâm nghiệp: "The contribution of remote sensing to the assessment of drought effects in forest ecosystems" ppsx
... for updating and enriching existing maps The operational use of such data for an annual mapping of the clear felling of Pinus pinaster stands over the million Landes forest in Aquitaine Region ... rapidly progressing during the last ten years with the increasing need to dene indicators of sustainable management and to implement certication procedures In addition, the preparation of the European ... stress index They dened an Equivalent Water Thickness (EWT) which was found to be one of the factors inuencing the signal in the SWIR domain A combination of SWIR and NIR bands is necessary to retrieve...
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báo cáo khoa học: "Contribution of magnetic resonance imaging in the diagnosis of talus skip metastases of Ewing’s sarcoma of the calcaneus in a child: a case report" pdf
... confirms that the routine radiological management of Ewing’s sarcoma should include radiography and MRI of the affected region, together with whole skeleton bone scintigraphy and CT of the chest ... chest MRI is essential in the determination of the true extent of the tumor It is important to bear in mind that early recognition of an unusual appearance and location of Ewing’s sarcoma is necessary ... established Therefore, a biopsy of the tumor with histopathological analysis is needed to confirm the diagnosis Staging, prior to biopsy, is essential to document the local and distant spread of the...
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Báo cáo y học: "Moxibustion and other acupuncture point stimulation methods to treat breech presentation: a systematic review of clinical trials" pptx
... inclusion and exclusion criteria, interventions and results In the case of missing data in the included studies, we contacted the original investigators and conducted the intention to treat analysis ... consideration in designing clinical trials Incorporating qualitative research into clinical trials may help interpret research findings [32] The authors declare that they have no competing interests ... trials [31] Double blinding was not practised in these trials as it is not practical to mask the practitioners and/ or the patients during moxibustion and other acupoint stimulation interventions lack...
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The use of liquid organic fertilizers in improving soil chemistry and fertility without harming soil and the environment
... equivalent to ml of LOF per spinach The application of the LOF to the soil is right after transplanting the water spinach in the pot The water spinach was watered everyday from the seedling to transplanting ... expecting to get good results for the soil and plant analysis after the applications of the lime and LOF in the experiments The rates of the LOF applications increases from the control, 5, 7.5, and ... built during his stay in Indonesia To his classmates in K42 and to all the Filipino students for sharing the happy days and hard times in the last four years of his life in Vietnam To Mrs Herminia...
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Correlation of the partitioning of dissolved organic matter fractions with the desorption of cd
... behavior of OM in soils and aquatic systems Mandal et al (2000) examined the effects of Ca and Mg on Ni binding by FA They concluded that bound Ni tends to be released in the form of Ni2 + ion in the ... particular pH increasing pH The y-axes in Fig 2a and c are in log form and thus show the striking increase in soluble HA as a function of pH For the 18 soils studied, the increase in soluble HA in the ... binding of Cu and Pb occurs relative to the binding of Cd, Ni, and Zn by solid constituents Our results indicate that proton 405 competition and/ or proton promoted dissolution greatly affect the...
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wo3 thin film sensor prepared by sol–gel technique and its low-temperature sensing properties to trimethylamine
... The working pressure in the analysis chamber was maintained below × 10−7 Pa during the specimen analysis To eliminate the effect of sample surface charging the shift of the XPS peak of carbon ... observed in the XRD In general, the sensitivity of the sensor is affected by the operating temperature Fig shows the relationship between the gas sensitivity and the operating temperature of WO3 thin ... almost the highest value at 70◦ C When the operating temperature is in the range of 70–85◦ C, the sensitivity increases a little With further increasing of the operating temperature, the sensitivity...
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A Generic QSAR for Assessing the Bioaccumulation Potential of Organic Chemicals in Aquatic Food Webs pot
... the combined process of the feeding rate, which is based on the bioenergetics of organism weight W (kg) and temperature T (8C), and of the diffusion rate of the chemical across the intestinal wall, ... in controlled laboratory studies and then used in equations 11 and to assess the effect of the metabolic rate on the food web bioaccumulation and the BAF in higher trophic levels In absence of ... application of the BAF-QSAR is in the derivation of water quality guidelines (WQG) In essence, the BAF represents the relationship between the concentration in the water and that in the organism of a...
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Input and output of dissolved organic and inorganic nitrogen in subtropical forests of South China under high air pollution docx
... throughfall inputs (Fig 8) The leaching rate of DIN was higher in the old-growth forest than in the other two, as shown by a steeper slope of the regression line in Fig 8a −1 −1 In the pine and mixed ... of the precipitation fell in the rainy season (March to August, Fig 1) Correspondingly, from 80% to 92% of DIN input in precipitation occurred in this period of the year (Fig 5) Monthly DIN inputs ... DIN uptake in the tree canopy on the −1 −1 order of to kg N yr must have occurred in the two young forests, which represented from 15% to 28% of their total DIN input in precipitation But, in...
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Tìm thêm: hệ việt nam nhật bản và sức hấp dẫn của tiếng nhật tại việt nam xác định các mục tiêu của chương trình khảo sát chương trình đào tạo của các đơn vị đào tạo tại nhật bản khảo sát chương trình đào tạo gắn với các giáo trình cụ thể xác định thời lượng học về mặt lí thuyết và thực tế điều tra đối với đối tượng giảng viên và đối tượng quản lí điều tra với đối tượng sinh viên học tiếng nhật không chuyên ngữ1 khảo sát thực tế giảng dạy tiếng nhật không chuyên ngữ tại việt nam khảo sát các chương trình đào tạo theo những bộ giáo trình tiêu biểu xác định mức độ đáp ứng về văn hoá và chuyên môn trong ct phát huy những thành tựu công nghệ mới nhất được áp dụng vào công tác dạy và học ngoại ngữ mở máy động cơ lồng sóc hệ số công suất cosp fi p2 đặc tuyến tốc độ rôto n fi p2 đặc tuyến dòng điện stato i1 fi p2 động cơ điện không đồng bộ một pha sự cần thiết phải đầu tư xây dựng nhà máy thông tin liên lạc và các dịch vụ phần 3 giới thiệu nguyên liệu chỉ tiêu chất lượng 9 tr 25