ammonia nitrite and nitrate
Báo cáo khóa học: Mechanistic insight into the peroxidase catalyzed nitration of tyrosine derivatives by nitrite and hydrogen peroxide doc
Ngày tải lên :
16/03/2014, 16:20
... 1ỵ kcat ẵE Knitrite KPhOH M ỵ M ẵNO2 ẵPhOH 19ị where kcat represents the turnover rate of enzymatic nitration, and Knitrite and KPhOH are the Michaelis constants M M for nitrite and the phenol, ... Soret band Therefore, the spectrum of LPO and HRP could only be monitored when the enzymes were treated with nitrite and hydrogen peroxide in the absence of phenols Using LPO and saturating nitrite ... (Enitr) and this behaves like peroxynitrite The lack of effect by CO2 further shows that the reaction occurs within the protein and is due to ironbound peroxynitrite and not to free peroxynitrite...
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ammonia sensors and their applications — a review
Ngày tải lên :
19/03/2014, 16:47
... manure from agriculture and wildlife or leaves [12] This is performed by bacteria and fungi The released ammonium ions and gaseous ammonia is again converted to nitrite and nitrate by bacteria [12,21] ... optimising the ammonia sensitivity of SnO2 based ammonia sensors are Pd, Bi and AlSiO3 [64] or Pt and SiO2 [65] The lowest ammonia detection limit found in literature is ppm, using a WO3 ammonia sensor ... metabolism Ammonia is excreted from the body in the form of urea and ammonium salts in urine Some ammonia is removed from the body through sweat glands As being a natural body product, ammonia is...
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Streamside management zones for buffering streams on farms: observations and nitrate modelling potx
Ngày tải lên :
31/03/2014, 13:20
... existing knowledge and assumptions about links between land and water management and environmental outcomes Improve our understanding of the links between land management and environmental outcomes ... property, and for assistance and advice, Rob Smith and Private Forests Tasmania for advice and support, and the Landscape Logic CERF Hub, CRC for Forestry and CSIRO for support and the opportunity to ... (CW2D) developed to predict nitrate removal from constructed wetlands (Langergraber and Šimunek 2005), and it had a user-friendly interface and a high degree of spatial and temporal flexibility...
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Báo cáo lâm nghiệp: "Influence of flooding on growth, nitrogen availability in soil, and nitrate reduction of young oak seedlings (Quercus robur L.)" docx
Ngày tải lên :
08/08/2014, 00:22
... at days 0, 26 and 34, n = in control roots at days 26 and 54 (*) and (**) indicate significant differences between flooded and control at p < 0.05 and p < 0.01 respectively; (Mann and Whitney test) ... especially light and nitrate availability, via phytochrome and photosynthetic sugar production In some species, root nitrate reductase activity increases under hypoxic conditions [12] Nitrate reduction ... of the present study was to determine whether soil nitrate depletion could affect the absorption and reduction of nitrate in roots and leaves and the amino acid partitioning in Quercus robur seedlings...
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Báo cáo lâm nghiệp: "Comparison of nitrogenase and nitrate reductase activities in two nitrogen-fixing tree species: black alder (Alnus glutinosa) and black locust (Robinia pseudoacacia)" pdf
Ngày tải lên :
09/08/2014, 04:20
... of nitrate in the roots and the absence of a close correlation between root NR activity and soil nitrate content suggest that the roots have an NR capacity able to reduce higher amounts of nitrate ... supply Discussion and Conclusion Though the age of the trees and the nature or nitrate content of the soil differed respective sites of each specharacteristics of the in vivo ase and NR N activities ... accumulated nitrate, since the NR activities measured with and without KN0 in the incubation medium were similar .1 30 At the A glutinosa site, higher values of soil nitrate content and of enzyme...
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development of on-the-go soil sensing technology for mapping soil ph, potassium and nitrate contents
Ngày tải lên :
13/11/2014, 09:17
... MEASUREMENTS AND SOLUBLE POTASSIUM AND B) CR NITRATE AND NITRATE- NITROGEN MEASUREMENTS OBTAINED THREE YEARS APART 62 FIGURE PRECISION (REPEATABILITY) ASSESSMENT FOR A) PH, B) POTASSIUM, AND C) NITRATE ... ammonium ions, and nitrate ions The plant available forms of nitrogen are both ammonium and nitrate ions Due to a process called nitrification, soil microorganisms convert ammonium to nitrate and hence, ... rate and magnitude of depletion of potassium and nitrate activity in the root zone of winter wheat They utilized a 1M NaCl salt bridge and KCl standards in water for potassium electrode and 1M...
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Application of ammonia borane and metal amidoboranes in organic reduction
Ngày tải lên :
09/09/2015, 18:48
... tetraalkoxyborohydride 1.4 Review on ammonia borane (AB) and metal amidoboranes (MAB) for hydrogen storage 1.4.1 Ammonia borane (AB) AB has equivalent protic H(N) and hydridic H(B) and has been intensively ... Chapter Reducing aldehydes and ketones by ammonia boranes 3.1 Introduction……………………………………………………………… 48 3.2 Results and discussion …………………………………………………… 49 3.2.1 Reaction process and reactivity study……………………………… ... T., Interaction of lithium hydride and ammonia borane in THF Chemical Communications 2008, (43), 5595-5597 viii SUMMARY Ammonia borane (NH3BH3, AB) and metal amidoboranes (M(NH2BH3)n,...
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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
... 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 ... that the amount of load 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 ... test plot that had all vegetation removed by hands 0.34 0.10 Forest 33.7ha -0.24 Rain 0.21 0.58 Upland Field20.7ha 2.68 2.84 Rain/Irrigation 0.12 Wetland 9.7ha -0.58 +2.47 0.03 0.06 Etc 2.7ha Unit：ｔ･ｙｰ1...
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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 ... Y., Li H., Li B, Chen D and White R E (2005) Spatial variability of shallow groundwater level, electrical conductivity and nitrate concentration, and risk assessment of nitrate contamination in ... mg/l, 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...
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Tài liệu Báo cáo khoa học: Basis of recognition between the NarJ chaperone and the N-terminus of the NarG subunit from Escherichia coli nitrate reductase pdf
Ngày tải lên :
16/02/2014, 14:20
... ± 0.2 and a binding constant (Kd) of 3.4 ± · 10)9 m and a second with a stoichiometry of 0.7 ± 0.1 and a Kd of 3.3 ± · 10)7 m (Fig 5A) Identical results were obtained using NarJ or NarJT and both ... [NarG(1–15) and NarG(1–28)] and solved their structures by NMR; NarG(1–15) corresponding to the predicted N-terminal helix and NarG(1–28), which included both the N-terminal helix and the b-sheet present ... resonances and the appearance of new resonances upon complex formation indicated a slow exchange on the NMR timescale between the free and the bound forms for NarJT These results and the higher...
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Tài liệu Báo cáo khoa học: The isolation and characterization of cytochrome c nitrite reductase subunits (NrfA and NrfH) from Desulfovibrio desulfuricans ATCC 27774 Re-evaluation of the spectroscopic data and redox properties ppt
Ngày tải lên :
21/02/2014, 00:20
... Escherichia coli K12 and its properties as a nitrite reductase Eur J Biochem 154, 457–463 Rehr, B & Klemme, J.H (1986) Metabolic role and properties of nitrite reductase of nitrate- ammonifying ... intense band of 61 kDa (NrfA) and a band of weak intensity of 19 kDa (NrfH), confirming its hetero-oligomeric nature (Fig 1, lane 1) However, in the absence of boiling (Fig 1A, lanes and 4) high ... and 4) high molecular mass bands of approximately 110 kDa and > 200 kDa were visible, as well as a faint band at 37 kDa, suggesting the presence of dimers All of the bands stained positively for...
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Báo cáo khoa học: The essential tyrosine-containing loop conformation and the role of the C-terminal multi-helix region in eukaryotic phenylalanine ammonia-lyases docx
Ngày tải lên :
07/03/2014, 12:20
... A), 266–295 (chain B) and 385–399 (chain C) in SmPALout ⁄ in and 33–128 and 333–351 (chain A), 272–303 (chain B) and 293–306 (chain C) in PlPALout ⁄ in The preoptimizations and molecular dynamics ... phenylalanine ammonia- lyases Fig Analysis of (A) experimental (1W27; blue) and (B) modified (1W27mod; red) P crispum PAL structures The total energy of the tetramer and the Ramachandran plot of ... related to PAL2, and PAL3 always clusters together with PAL4 [61] In A thaliana, from the molecular phenotype, common and specific functions of PAL1 and PAL2 were delineated, and PAL1 was qualified...
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Báo cáo khoa học: Homoadenosylcobalamins as probes for exploring the active sites of coenzyme B12-dependent diol dehydratase and ethanolamine ammonia-lyase docx
Ngày tải lên :
07/03/2014, 21:20
... the method of Gill and von Hippel [56] from the deduced amino acid compositions and subunit structures were 120 500 and 302 400 m)1Æcm)1 for diol dehydratase and ethanolamine ammonia- lyase, respectively ... 36–44% and 38% as active as AdoCbl in diol dehydratase [27,43,44] and glycerol dehydratase [44], respectively, but it serves as a strong competitive inhibitor for ethanolamine ammonia- lyase [44] and ... dehydratase and Escherichia coli ethanolamine ammonialyase were purified to homogeneity from E coli JM109 cells harboring expression plasmids pUSI2E(DD) [53,54] and pUSI2ENd(EAL) (K Akita and T Toraya,...
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Báo cáo khoa học: Purification of a plant nucleotide pyrophosphatase as a protein that interferes with nitrate reductase and glutamine synthetase assays pdf
Ngày tải lên :
08/03/2014, 08:20
... inhibition of NR and GS (Eur J Biochem 270) 1359 Fig Co-purification of glutamine synthetase and nitrate reductase inhibitor proteins (A) Activity of glutamine synthetase (h) and nitrate reductase ... and methods) and run on SDS/PAGE and stained with Coomassie blue Molecular mass standards (in kDa) are phosphorylase (97), bovine serum albumin (66), ovalbumin (43), carbonic anhydrase (30) and ... AMP from NADH, ATP and FAD by purified NR/GS inhibitor in a 100-lL incubation at 30 °C for 10 min, using the amounts and concentrations of ATP and NADH used in standard GS and NR assays, respectively...
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NITRITE CURING OF MEAT The N-Nitrosamine Problem and Nitrite Alternatives pdf
Ngày tải lên :
15/03/2014, 09:20
... cures and combinations of the two, were commonplace Dry curing is the oldest technique and involves applying uniform and quantitated mixtures of salt, sugar, spices and sodium nitrate and/ or nitrite ... Flores and Toldra 1993; Toldri et al 1997h): (1) reception and classification of hams, and then presalting where a mixture of curing ingredients ( i e , salt, nitrate and/ or nitrite) and adjuncts ... formation, mechanism and carcinogenic potential Mutat Res 259, 277-289 Walker, R 1990 Nitrates, nitrites and N-nitroso compounds: a review of the occurrence in food and diet and the toxicological...
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Báo cáo khoa học: Nitric oxide formation from the reaction of nitrite with carp and rabbit hemoglobin at intermediate oxygen saturations pdf
Ngày tải lên :
16/03/2014, 06:20
... afnity and increased cooperativity Reaction of nitrite with carp Hb at different O2 saturations Nitrite was added at an [NO ] [Hb] ratio of 2.7 and the concentrations of deoxyHb, oxyHb, metHb and ... reaction intermediates other than metHb and HbNO [26] In carp and rabbit there was practically equal formation of metHb and HbNO, and the sum of metHb and HbNO concentrations by the time that ... of O2 to ferrous heme and subsequent NO-mediated oxidation of oxyHb to form metHb and nitrate [30] Only in the present case will the Hb oxidation be both NO-mediated and nitrite- mediated, as a...
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design and performance ofan ammonia measurement system
Ngày tải lên :
19/03/2014, 16:47
... Sensors Ammonia emissions may be in the form of ammonia gas and ammonium particulate Ammonia emissions may be measured using continuous emission monitors, wet chemistry, and particulate samplers Ammonia ... involves measuring upwind and downwind concentrations and modeling the dispersion of ammonia The plume sampling method involves sampling upwind and downwind of the source and back calculating the ... their ammonia production Ammonia is known to have a pungent odor and may cause respiratory diseases in both animals and humans if breathed in large quantities Particulate matter may form when ammonia...
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influence of dopant in the synthesis, characteristics and ammonia sensing behavior
Ngày tải lên :
20/03/2014, 13:04
... morphology of the single and co-doped PANI and the direct effects on their conductivity and ammonia gas sensing properties mer, it was filtered and washed several times with methanol and deionized water ... to apply the current and to measure the voltage drop respectively R and R0 are the resistances measured in the presence of ammonia and air respectively A known volume of ammonia gas was introduced ... at 1324 cm− and 1296 cm− for PANI_PTSA and PANI_HCl_PTSA respectively can be assigned due to –NH– stretching of secondary amine The bands at 1158 cm− and 1139 cm− for PANI_HCl_PTSA and PANI_PTSA...
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Chemicals,Chemicals Organic, Chemicals Inorganic, Zeolite, Sulphate, Wax, Activated Carbon, Polishing, Compounds, Acids, Starch, Nitrate, Phosphate, Formaldehyde, Biotechnology, Enzymes, Bio Fertilizer, Vermiculture and Vermi Compost docx
Ngày tải lên :
22/03/2014, 14:20
... Identification and Selection of Plant and Machinery, Manufacturing Process and or Equipment required, General Guidance, Technical and Commercial Counseling for setting up new industrial projects and industry ... Feasibility and Market Study, Identification of Profitable Industrial Project Opportunities, Preparation of Project Profiles and Pre-Investment and Pre-Feasibility Studies, Market Surveys and Studies, ... LEATHER ENZYME (IN POWDER FORM) USED FOR DENIM CLOTH AND GARMENT WASHING MAGNESIUM HYDROXIDE FROM DOLOMITE BLENDING OF PUFF POLYOL AND PUFF SANDWITCH PANELS TEXTILE AUXILIARIES METHYL CHLORIDE...
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