نتایج جستجو برای Nitrate exchange

تعداد نتایج: 140129  

2017
Alan D. Goddard, Shilpa Bali, Despoina A.I. Mavridou, Victor M. Luque‐Almagro, Andrew J. Gates, M. Dolores Roldán, Simon Newstead, David J. Richardson, Stuart J. Ferguson,

Nitrate and nitrite transport across biological membranes is often facilitated by protein transporters that are members of the major facilitator superfamily. Paracoccus denitrificans contains an unusual arrangement whereby two of these transporters, NarK1 and NarK2, are fused into a single protein, NarK, which delivers nitrate to the respiratory nitrate reductase and transfers the product, nitr...

2010
S. Geno Lehman, Mohammad Badruzzaman, Samer S. Adham, Deborah J. Roberts, Dennis A. Clifford, Geyan Zuo, Arti Patel, Bruce E. Rittmann, Chang Ahn, Steve Van Ginkel,

OBJECTIVES: The objectives of this study were to (1) summarize published literature on biological perchlorate/nitrate destruction; (2) perform bench-scale tests to characterize biodegradation parameters (i.e., salinity, pH, temperature, nutrients, electron donor, etc.), improve perchlorate/nitrate destruction rates, and evaluate mechanisms to generate and retain biomass; and (3) validate bench-...

Journal: :Water research 2002
Byung-Uk Bae, Yoo-Hoon Jung, Woon-Woo Han, Hang-Sik Shin,

Ion exchange technology is currently the best for removing nitrate from drinking water. However, problems related to the disposal of spent brine from regeneration of exhausted resins must be overcome so that ion exchange can be applied more widely and economically, especially in small communities. For this purpose, a novel spent brine recycling system using combined biological denitrification a...

2002
C. V. Toner,

The negative impact of nitrate (NO3) on groundwater supplies has sparked a great deal of interest and concern in recent years, particularly in areas where coarse-textured soils abound. In light of this concern, the anion exchange chemistry of eight soils from the Middle Atlantic region was studied with particular emphasis on NO3 retention and kinetics. The soils were chosen to encompass a range...

2017
Salvatore S. Mangiafico, Karl Guillard,

1999) in a variety of locations and soil types. The AEM technique, however, may be more sensitive than tradiThere is not extensive research on the potential of anion exchange tional extractions to treatment differences at low soil membranes (AEMs) for determining available N in soils of turfgrass NO3–N concentrations (Pare et al., 1995; Wander et al., systems, nor on the use of reflectance mete...

Journal: :Water research 2004
Jaeshin Kim, M M Mark M Benjamin,

Arsenate and nitrate can be removed quantitatively from drinking water by anion exchange. However, if the raw water contains substantial concentrations of sulfate or nitrate, the resin becomes exhausted quickly, and the requirements for regenerant (brine) can make the process unattractive. Previously, we described a modified ion exchange operating procedure for arsenic removal from solutions co...

Journal: :Acta crystallographica. Section C, Crystal structure communications 2010
Richard Pažout, Jitka Housková, Michal Dušek, Jaroslav Maixner, Jana Cibulková, Petr Kačer,

The title compound, cis-diacetonitrile[(1R,2R)-1,2-diaminocyclohexane-κ(2)N,N']platinum(II) dinitrate monohydrate, [Pt(C(2)H(3)N)(2)(C(6)H(14)N(2))](NO(3))(2)·H(2)O, is a molecular salt of the diaminocyclohexane-Pt complex cation. There are two formula units in the asymmetric unit. Apart from the two charge-balancing nitrate anions, one neutral molecule of water is present. The components inter...

2016
Kelly L. Kopp, Karl Guillard,

do not completely contact the soil. Furthermore, it is possible that the adsorption of ions by resins is governed by Anion exchange membranes (AEMs) are a potential method for two distinct diffusion coefficients, an internal and an exdetermining the plant available N status of soils; however, their capacity for use with turfgrass has not been researched extensively. The ternal coefficient (Coop...

Journal: :Journal of research in health sciences 2010
Peyman Shahbazi, Forugh Vaezi, Amir Hossein Mahvi, Kazem Naddaffi, Ali Reza Rahmani,

BACKGROUND A laboratory study was conducted to investigate the ability of a special type of strongly basic resin MP500WS for the removal of nitrate from different waters. METHODS Two different types of Point-of-Use (POU) devices containing an identical resin were used. MP500WS known as macro porous was used in POU devices for removal of high concentrations of nitrate and sulfate ions from wat...

Journal: :Plant physiology 2003
Yan-Ping Cen, David B Layzell,

A gas analysis system was built to study the relationship between the reductant cost of NO(3)(-) assimilation and the measured rate of CO(2) and O(2) exchange in roots, leaves, and stems+ petioles of soybean (Glycine max L. Merr. cv Maple glen) plants. The measurements were used to calculate the diverted reductant utilization rate (DRUR = 4*[measured rate of CO(2) + measured rate of O(2)], in m...

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