nitrogen phosphorus and sulfur bacteria

Nonpoint Pollution of Surface Waters with Phosphorus and Nitrogen pdf

Ngày tải lên : 29/03/2014, 21:20

... with Phosphorus and Nitrogen Issues in Ecology Number Summer 1998 Nonpoint Pollution of Surface Waters with Phosphorus and Nitrogen SUMMARY Runoff from our farms and cities is a major source of phosphorus ... Surface Waters with Phosphorus and Nitrogen by Stephen Carpenter, Chair, Nina F Caraco, David L Correll, Robert W Howarth, Andrew N Sharpley, and Val H Smith aquatic ecosystems, and the consequent ... Effects Phosphorus in water is not considered directly toxic to humans and animals, and because of this, no Number Summer 1998 Photo by Chris Luecke Issues in Ecology Figure - Nitrogen and phosphorus...

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INFLUENCE OF NITROGEN, ACETATE AND PROPIONATE ON HYDROGEN PRODUCTION FROM PINEAPPLE WASTE EXTRACT BY Rhodospirillum rubrum

Ngày tải lên : 05/09/2013, 09:08

... on the other hand, is carried out by facultative anaerobes and obligate anaerobes (Joyner and Winter, 1977; Nandi and Segupta, 1998) Among these microorganisms, photosynthetic bacteria had been ... production by photosynthetic bacteria Effect of nitrogen levels and initial acetate concentrations Continuous illumination Upon investigation of the effect of nitrogen levels and initial acetate concentrations ... production (Figures 1, 2) Figures and illustrated a reduction of glucose concentration and an increase of acetate and butyrate during hydrogen production at each nitrogen level and various initial acetate...

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THE NITRATE NITROGEN POLLUTION AND THE NITROGEN REMOVAL BY PADDY FIELD IN AGRICULTURAL AREA

Ngày tải lên : 05/09/2013, 09:08

... Kuroda H.,(1991), Nitrogen Outflow Diagram in a Small Agricultural Area Having Uplands and Lowlands Trans JSIDRE 154,65-72.(in Japanese) Tabuchi T., (1998), Nitrogen Outflow Model with Nitrogen Removal ... decreases as it passes through the lowlands A wetland has a natural purification function for nitrogen and is therefore considered important in the curtailment of nitrogen loads flow into the lake ... Journal of Water and Environment Technology, Vol.3, No.2, 2005 fields and forests on a plateau and a wetland which includes a paddy field in the lowlands Initial investigation showed...

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Nitrogen Dynamics and Biomass Production in a Vertical Flow Constructed Wetland Cultivated with Forage Rice and their Mathematical Modeling

Ngày tải lên : 05/09/2013, 09:38

... (3) where NHi and NOi represent NH4-N and NO2+3-N in the ith layer [g-N/m2], respectively, and Nrice is the rice nitrogen [g-N/m2] The terms radv,NH,i and radv,NO,i are the NH4-N and NO2+3-N inflow ... production and water treatment and a detailed understanding of the nitrogen dynamics in VF constructed wetlands CONCLUSIONS In the experimental pots replicating VF constructed wetlands, a variety ... closely related with growth Assuming Monod-type nitrogen uptake kinetics (Selim and Iskandar, 1981) and ignoring the temperature effects, the NH4-N and NO2+3-N uptake by rice is described as rup...

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Báo cáo khoa học: Biochemical and enzymological aspects of the symbiosis between the deep-sea tubeworm Riftia pachyptila and its bacterial endosymbiont pptx

Ngày tải lên : 30/03/2014, 15:20

... pachyptila and its bacterial endosymbiont (Eur J Biochem 271) 3099 be degraded and constitute an alternative source of inorganic carbon and nitrogen [79,80] Consequently, the existence and distribution ... metabolism and ATP production Assimilation of nitrogen The large biomass [56,57] and the high growth rate [58] of the chemoautotrophic symbiotic organisms imply a high demand for nitrogen This ... vestimentiferans and their bacterial endosymbiont raises the question of the transmission of the bacteria from one worm generation to the following one In some cases the bacteria is present in the ovule and...

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Báo cáo sinh học: " Genome degeneration affects both extracellular and intracellular bacterial endosymbionts" pot

Ngày tải lên : 06/08/2014, 19:20

... Blochmannia spp γ-Proteobacteria Mollicutes Blattabacterium spp Phylum γ-Proteobacteria γ-Proteobacteria γ-Proteobacteria Chlamydiae γ-Proteobacteria γ-Proteobacteria Myxobacteria Role as symbiont ... transcriptional regulators, and recombination and DNA repair factors, and high mutation rates [6-8] Similar genomic features are also observed in pathogens, including Mycoplasma species and obligate intracellular ... endosymbiont and an increasing deterioration in the bacteria will be harmful for the host unless it is able to restore the essential functions provided by the bacteria in some way Stinkbugs and their...

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Báo cáo lâm nghiệp: "Sulphur and nitrogen concentrations and ﬂuxes in bulk precipitation and throughfall in the mountain and highland spruce stands in the Czech Republic" docx

Ngày tải lên : 07/08/2014, 10:21

... solar radiation and to hold the funnels approximately m above the ground There were collectors randomly distributed at the mountain spruce stand and at the highland spruce stand During the winter ... Truparová, H Lorencová, M Remeš and L Jura for sample handling and dedicated work in the ﬁeld and in the laboratory and K Jackson for language revision References Andersson F., Persson T (1988): ... the agricultural-forest landscape of the Drahanská vrchovina uplands Ekológia, 15: 295–306 Kopáek J., Veselý J (2005): Sulfur and nitrogen emissions in the Czech Republic and Slovakia from 1850...

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Báo cáo lâm nghiệp: "Forest and shrubland canopy carbon uptake in relation to foliage nitrogen concentration and leaf area index: a modelling analysis" ppt

Ngày tải lên : 08/08/2014, 00:22

... and foliage nitrogen concentration per unit area, Na were increased together by 50 and 20% respectively and the resulting values of Vcmax Carbon uptake, leaf area and nitrogen 529 and Jmax were ... Carbon and nitrogen distribution and accumulation in a New Zealand scrubland ecosystem, Can J For Res 30 (2000) 1246–1255 [46] Snowdon P., Benson M.L., Effects of combinations of irrigation and ... in New Zealand are likely to be very variable, and that Carbon uptake, leaf area and nitrogen 527 Table II Estimates of annual light use efficiency for indigenous forests in New Zealand using...

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Báo cáo lâm nghiệp: "Interactive effects of phosphorus and light availability on early growth of maritime pine seedlings" pptx

Ngày tải lên : 08/08/2014, 00:22

... how growth rate and biomass of a forest tree species are affected by different levels of light and phosphorus availability and whether some interactive responses to light and phosphorus limitation ... seedlings was 120–180 and 400– 500 µmol m–2 s–1 for the LL and HL treatments, respectively Table II Mean and standard deviation of diurnal air and nutrient solution temperatures (°C) and incident PPFD ... importance of interactive effects of nitrogen and light on regulating the physiology and growth of seedlings For example, Elliott and White [16] demonstrated that high nitrogen significantly increased...

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Báo cáo lâm nghiệp: "Effects of a clear-cut on the in situ nitrogen mineralisation and the nitrogen cycle in a 67-year-old Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) plantation" potx

Ngày tải lên : 08/08/2014, 01:21

... decomposition experiment, Woodland Research Index 134, Pulp and Paper Research Institute of Canada, Montreal, 1962 [93] Wiklander G., Clear-cutting and the nitrogen cycle Heterogeneous nitrogen leaching after ... (throughfall and soil leaching respectively) and NO 3-N and NH +-N concentrations in solutions Drainage of water was calculated with a water model using the climatic data of the site, stand structure and ... air-dried and sieved to separate resin and glass beads Nitrate and ammonium were extracted by M NaCl (4 g: 40 mL dwt: v) after manual shaking, batch contact (1 h) and filtration Mineral nitrogen...

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Báo cáo y học: "Genomics and the bacterial species problem" potx

Ngày tải lên : 14/08/2014, 17:22

... ancestral bacterial population And, for both animal and bacterial species, genomic coherence - which we might define as a greater degree of similarity in gene content (the actual number and identity ... genomic islands Island genes appear to have been acquired in part by phage-mediated lateral gene transfer, and some are differentially expressed under light and nutrient stress.” In this and many ... help, and drop them when they hinder, understanding.” Acknowledgements We thank Joe Bielawski, Eric Bapteste, Paco Rodriguez-Valera and Olga Zhaxybayeva for invaluable comments, and CIHR and Genome...

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Dendritic cells respond differently to live and killed bacteria molecular mechanisms of pathogen recognition by dendritic cells and implications for vaccine development

Ngày tải lên : 14/09/2015, 08:24

... strategy against bacterial disease Our immune cells have the ability to specifically recognize and destroy bacteria Bacteria or bacteria toxins that enter our body will encounter the cells and mechanisms ... generating random and highly diverse BCRs and TCRs by somatic gene recombination The interaction of the BCR and TCR with antigens activates the B and T cells leading to proliferation and the generation ... Stenico, J Peden, and A Lloyd 1993 Biochem Soc Trans 21:835841) 31 Chapter 2.1 Materials and methods Bacteria culture and preparation E.coli DH5 was obtained from Invitrogen and cultured in Luria-Bertani...

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Analysis of nitrogen fixation and transport in soybean (glycine max (l ) merr ) using nitrogen isotopes as tracer

Ngày tải lên : 20/05/2016, 16:28

... 1.2.1 Biological nitrogen fixation and nitrogen nutrition demand in soybean plant Although nitrogen is dominant element on the Earth, but most of organisms cannot use gaseous nitrogen (N2) directly ... nodules and roots in the root sections, and the stems, leaves, pods and seeds in the shoot sections were separated for plant samples on 91 DAP, and the dry weight (Table 3.2) and total nitrogen ... cells in nodules, and start to fix atmospheric dinitrogen (N2) Ammonia is known to be an initial product of nitrogen fixation catalyzed by the enzyme “nitrogenase” (EC 1.18.6.1), and more than 90%...

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The reaction center of green sulfur bacteria 1

Ngày tải lên : 21/12/2016, 10:50

... center and other electron transport components in green sulfur bacteria SQR and FCC stand for sul¢de^quinone reductase; £avocytochrome c, bL and bH for low-potential and high-potential heme b; and ... and X) Cytoplasmic and periplasmic ends are shown by the letters c and p on top of the alignment Residues involved in pigment and FeS-cluster binding are highlighted by arrows; P, Cp2 and stand ... with loss of FeS-centers and of the subunits PscB and -D The interaction of the three proteins is indicated by the observation that PscD copuri¢es with FMO and PscB from RCs and by cross-linking...

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Báo cáo khoa học: The sulfur atoms of the substrate CoA and the catalytic cysteine are required for a productive mode of substrate binding in bacterial biosynthetic thiolase, a thioester-dependent enzyme doc

Ngày tải lên : 16/03/2014, 04:20

... for the CoA sulfur atom is the presence of the four sulfur atoms from Cys89, Met157, Met288 and Cys378 Due to the high polarizability of sulfur atoms [33], it is expected that sulfur sulfur interactions ... terminal sulfur atom of CoA are listed in Table and shown in Fig Apart from the sulfur- containing residues Cys89, Met157, Met288 and Cys378, these also include side chain atoms of Ala318 and Phe319; ... terminal sulfur are coloured green, hydrogen bonds are coloured red, and interactions between hydrophobic side chains and the planar amide bonds of CoA are coloured yellow b-strand Cb2, and Met134...

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Associative and endophytic nitrogen fixing bacteria and cyanobacterial associations

Ngày tải lên : 16/03/2014, 11:45

... PHYLOGENY AND ECOLOGY OF AZOSPIRILLUM AND OTHER NITROGEN- FIXING -SUBCLASS PROTEOBACTERIA 3.1 Diversity of Diazotrophic -Proteobacteria The nitrogen- fixing bacteria of the subclass of Proteobacteria ... Phylogeny and in situ Localization of Bacterial Isolates and Communities 23 Molecular Phylogeny and Ecology of Azospirillum and Other Nitrogen- fixing -Subclass Proteobacteria ... Diseases by Associative and Endophytic Nitrogen- fixing Bacteria R Bally and C Elmerich Beneficial Plant-Associated Nitrogen- fixing Bacteria and Biocontrol of...

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An overview of the bacteria and archaea involved in removal of inorganic and organic sulfur compounds from coal

Ngày tải lên : 21/12/2016, 10:34

... of a main bacteria which is able to involve in oxidation of inorganic sulfur and possible organic sulfur in coal desulfurization process The diversity of chemolithotrophic bacteria and the evolution ... Troitsky, A.V and Pivovarova, T.A., 1993 Sulfurococcus - a new genus of thermoacidophilic archaebacteria oxidizing sulfur, ferrous iron and sulfide minerals In: A.E Torma, M.L Apel and C.L Brierley ... Kulpa, C.E., Mjoli, N and Rockey, M.T., 1986 Comparison of iron and sulfur oxidation in Thiobacillus ferrooxidans: Inhibition of iron oxidation by growth on sulfur In: H.L Ehrlich and D.S Holmes (Eds.),...

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Chuyển hóa Calcium and Phosphorus trên bệnh nhân suy thận

Ngày tải lên : 22/10/2012, 15:59

... nhận hiệu cinacalcet theo hướng nhìn Calcium, Phosphorus, Parathyroid Hormone, and Cardiovascular Disease in Hemodialysis Patients: The USRDS Waves 1,3, and Study Cơ sở • Gần đây, Ca, Phos, PTH lôi ... huyết tương Cơ sở • Ganesh et al JASN 2001 • Dữ liệu từ CMAS and Dialysis M&M Waves 1, 3, and • Bn có P > 6.5, tích số Ca x P, and PTH > 495 có tử vong cao – Dựa nhiều nguyên nhân gây tử vong ... – – – – Đối tượng phương pháp nghiên cứu • Nghiên cứu hồi cứu, quan sát nghiên cứu Waves 1, 3, and Dialysis M&M – Đoàn hệ hội cứu bn TNT Mỹ • Hơn 1300 đơn vò TNTđược chọn ngẫu nhiên • Dữ liệu...

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DMF Decomposition and Nitrogen Removal Performance by a Mesh-Filtration Bioreactor under Acidic Conditions

Ngày tải lên : 05/09/2013, 09:38

... Tosoh TSKgel IC-Anion PWXL Kjeldahl nitrogen was analyzed [16], and organic nitrogen was evaluated from the difference between Kjeldahl nitrogen and ammoniac nitrogen 2.5 Respiration activity of ... nitrification and denitrification rates were measured at pH 3, 5, and (Figs and 8) In the case of the S-2 sludge, both nitrification and denitrification activities were highest at pH and were not ... Association and Water Environmental Federation, (2005) Standard method for examination of water and wastewater, 21st ed [16] Japanese Standards Association (1998) Japanese Industrial Standards,...

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Present Status and Feature of Groundwater Contamination by Nitrate-nitrogen in Kumamoto City

Ngày tải lên : 05/09/2013, 09:38

... present status and long-term change of nitrate -nitrogen concentration in Kumamoto city-groundwater are investigated and discussed MATERIALS AND METHODS Subsurface geological structure and groundwater ... well and shallow well Nitrate -nitrogen was principally detected at 22 sampling points located in the area except middle- and southwestern-part The NO3-N concentration range was 0.2~5.8 mg/l, and ... and average and median were 3.0 and 3.1 mg/l, respectively Figure shows the NO3-N concentrations in the deep well and shallow well at nos 2-27 sampling points mentioned before Nitrate -nitrogen was...

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