Journal articles: 'Nitrilotriacetic acid (NTA)'

1

Starynowicz, Przemysław. "Europium(II) complexes with nitrilotriacetic acid (NTA)." Polyhedron 22, no. 20 (September 2003): 2761–65. http://dx.doi.org/10.1016/s0277-5387(03)00452-2.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Raksit, Asit. "Gas Chromatographic and Mass Spectrometric Analysis of Nitrilotriacetic Acid in Environmental Aqueous Samples." Journal of AOAC INTERNATIONAL 85, no. 1 (January 1, 2002): 50–55. http://dx.doi.org/10.1093/jaoac/85.1.50.

Full text

Abstract:

Abstract This study describes a fast and accurate method for the sample preparation, identification, and quantitation of nitrilotriacetic (NTA) acid in environmental aqueous samples at a concentration of ppb level. The method is sensitive, specific, and free from the interferences of fatty and amino acids. The tri-n-propyl- and tri-n-butyl-NTA acid esters were prepared by the reaction of n-propyl-HCl and n-butyl-HCl solutions and NTA acid, respectively. The derivatives were analyzed by a gas chromatograph equipped with a mass spectrometric detector. The method detection limit, 0.006 mg/L of each NTA ester, was determined and validated by an analysis of a fortified water sample. The overall recoveries were 103–115%, n = 8. The method was applied to a real sample and a 0.90 mg/L concentration of NTA acid was found. Mass fragmentation patterns of the derivatives are also reported.

APA, Harvard, Vancouver, ISO, and other styles

3

Colacci, A. "binding of 14C-nitrilotriacetic acid (NTA) with DNA." European Journal of Cancer and Clinical Oncology 21, no. 11 (November 1985): 1376. http://dx.doi.org/10.1016/0277-5379(85)90352-9.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Zhang, Yuxuan, Weibing Wu, Yueyi Liu, Weijie Yang, Wenwen Chen, and Jizuo Zhao. "Alkaline electrolyte: toward high-quality CdTe films with the assistance of strong complexing agent and organic base." CrystEngComm 20, no. 1 (2018): 8–11. http://dx.doi.org/10.1039/c7ce01816a.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Salazar-Sandoval, Eric Johansson, Mats K. G. Johansson, and Anwar Ahniyaz. "Aminopolycarboxylic acids as a versatile tool to stabilize ceria nanoparticles – a fundamental model experimentally demonstrated." RSC Adv. 4, no. 18 (2014): 9048–55. http://dx.doi.org/10.1039/c3ra45875j.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Kar, P. K., and Gurmeet Singh. "Evaluation of Nitrilotrimethylene Phosphonic Acid and Nitrilotriacetic Acid as Corrosion Inhibitors of Mild Steel in Sea Water." ISRN Materials Science 2011 (September 11, 2011): 1–6. http://dx.doi.org/10.5402/2011/167487.

Full text

Abstract:

The inhibition efficiency of nitrilotrimethylene phosphonic acid (NTP) in controlling mild steel corrosion in sea water has been evaluated by galvanostatic polarization, electron scanning for chemical analysis (ESCA), and scanning electron microscope (SEM) methods. The results are compared with those obtained for nitrilotriacetic acid (NTA). NTP is found to be more effective in protecting mild steel against sea water corrosion as compared to NTA. The surface of mild steel in presence and absence of NTP and NTA is characterized by ESCA and SEM. From the ESCA studies, it is found that NTP formed a stable and compact film over the mild steel.

APA, Harvard, Vancouver, ISO, and other styles

7

Xie, Jieli, Yunguo Liu, Guangming Zeng, Huan Liu, Bohong Zheng, Hui Tang, Weihua Xu, et al. "The effects of P. aeruginosa ATCC 9027 and NTA on phytoextraction of Cd by ramie (Boehmeria nivea (L.) Gaud)." RSC Advances 5, no. 83 (2015): 67509–17. http://dx.doi.org/10.1039/c5ra13420j.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Loch, J. P. G., and P. Lagas. "The Mobilization of Heavy Metals in River Sediment by Nitrilotriacetic Acid (NTA)." Water Science and Technology 17, no. 9 (September 1, 1985): 101–13. http://dx.doi.org/10.2166/wst.1985.0085.

Full text

Abstract:

The mobilization of heavy metals in river water and sediment by NTA during river bank filtration was investigated in the laboratory under oxygen-deficient conditions. Four PVC-columns, 1.20 m long, 0.18 m diameter, filled with river bed sediment, were percolated for 7 months with river water spiked with NTA. Water and sediment were collected from a branch of the river Rhine, where the sediment has high metal contents. The percolation rate was 10 cm. day−1. Supply water for three columns was kept oxygen-deficient. Water for the fourth column had an oxygen content of 6 mg.dm−3. To the anoxic river water NTA was added to concentrations of 0, 100 and 600 µg.dm−3 respectively. The oxic water obtained an NTA-concentration of 100 µg/l. Leachate and pore water were analysed for heavy metals, inorganic macroparameters and NTA. After percolation the sediment was analysed for bound metals. When river water and sediment contained adapted micro-organisms, NTA was degraded within two weeks in all columns. Degradation was nearly absent during the first three weeks of percolation, due to the necessary adaptation. Except for the first month, NTA was not detected in the pore water below 10-30 cm. In the first month it penetrated into the leachate. Within the concentration range considered, neither NTA- nor O2-content of the supply water affected the mobilization of the heavy metals considered.

APA, Harvard, Vancouver, ISO, and other styles

9

Yin, Yicheng, Yaqin Wang, Yunguo Liu, Guangming Zeng, Xinjiang Hu, Xi Hu, Lu Zhou, Yiming Guo, and Jiang Li. "Cadmium accumulation and apoplastic and symplastic transport in Boehmeria nivea (L.) Gaudich on cadmium-contaminated soil with the addition of EDTA or NTA." RSC Advances 5, no. 59 (2015): 47584–91. http://dx.doi.org/10.1039/c5ra05717e.

Full text

Abstract:

A Cd-tolerant plant species named Boehmeria nivea (L.) Gaudich (ramie) was applied to study its Cd accumulation and translocation mechanisms with the addition of ethylene diamine tetracetic acid (EDTA) or nitrilotriacetic acid (NTA).

APA, Harvard, Vancouver, ISO, and other styles

10

Sahul, K., and B. K. Sharma. "Gamma radiolysis of nitrilotriacetic acid (NTA) in aqueous solutions." Journal of Radioanalytical and Nuclear Chemistry Articles 109, no. 2 (February 1987): 321–27. http://dx.doi.org/10.1007/bf02037875.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Nancharaiah, Y. V., N. Schwarzenbeck, T. V. K. Mohan, S. V. Narasimhan, P. A. Wilderer, and V. P. Venugopalan. "Biodegradation of nitrilotriacetic acid (NTA) and ferric–NTA complex by aerobic microbial granules." Water Research 40, no. 8 (May 2006): 1539–46. http://dx.doi.org/10.1016/j.watres.2006.02.006.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Chen, Shen-Yi, Chiou-Nan Liou, and Jih-Gaw Lin. "The influence of nitrilotriacetic acid (NTA) on metal mobilization from a contaminated river sediment." Water Science and Technology 37, no. 6-7 (March 1, 1998): 47–54. http://dx.doi.org/10.2166/wst.1998.0734.

Full text

Abstract:

Sediment samples and river water used in this study were collected from a contaminated river, namely, the Lau-Che river located in northern Taiwan, in order to investigate the mobilization of heavy metals from river sediment influenced by NTA in a simulated continuous-flow channel reactor. Concurrently, the kinetic model was applied to describe the mobilization of heavy metals from sediments. When the NTA was first discharged into the reactor, the initial adsorption of NTA by the sediment decreased the mobilization of heavy metals and changed the released behavior of heavy metals. It made bad agreement between models and experimental data. Due to the bacteria were completely acclimated to degrade NTA in the former experiment, the release of heavy metals was significant at the initial addition of NTA and the concentrations of heavy metals in the liquid phase decreased after that the NTA was degraded by bacteria. The maximum mobilization of heavy metals increased with the increase of concentration of NTA. According to the experimental data, the mobilization of heavy metals by NTA appeared to follow multiple first-order reaction model, two constant model, or diffusion model.

APA, Harvard, Vancouver, ISO, and other styles

13

Paradis, Paul M. "Hydrogen Peroxide Bleaching of Amaranth Catalysed by Nickel(II) Nitrilotriacetic Acid." Journal of Chemical Research 23, no. 5 (May 1999): 340–41. http://dx.doi.org/10.1177/174751989902300522.

Full text

Abstract:

The complex of NiII with nitrilotriacetic acid (NTA) (but not other aminocarboxylate complexes) autocatalyses the hydrogen peroxide bleaching of amaranth, although the reaction is inhibited by the absence of light or presence of alcohol, suggesting a radical-based mechanism.

APA, Harvard, Vancouver, ISO, and other styles

14

Li, Yulian, Junyong He, Kaisheng Zhang, Tao Liu, Yi Hu, Xifan Chen, Chengming Wang, Xingjiu Huang, Lingtao Kong, and Jinhuai Liu. "Super rapid removal of copper, cadmium and lead ions from water by NTA-silica gel." RSC Advances 9, no. 1 (2019): 397–407. http://dx.doi.org/10.1039/c8ra08638a.

Full text

Abstract:

A silica gel material modified with nitrilotriacetic acid (NTA-silica gel) was sensibly designed and prepared via a simple method for the super rapid removal of Cu²⁺, Cd²⁺ and Pb²⁺ from water.

APA, Harvard, Vancouver, ISO, and other styles

15

Brellier, Marie, Guy Duportail, and Rachid Baati. "Convenient synthesis of water-soluble nitrilotriacetic acid (NTA) BODIPY dyes." Tetrahedron Letters 51, no. 9 (March 2010): 1269–72. http://dx.doi.org/10.1016/j.tetlet.2009.12.126.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Egli, T., and H. U. Weilenmann. "Biodegradation of nitrilotriacetic acid (NTA) in the absence of oxygen." Experientia 42, no. 9 (September 1986): 1061–62. http://dx.doi.org/10.1007/bf01940733.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Tural, Bilsen, Murat Kaya, Necati Özkan, and Mürvet Volkan. "Preparation and Characterization of Ni-Nitrilotriacetic Acid Bearing Poly(Methacrylic Acid) Coated Superparamagnetic Magnetite Nanoparticles." Journal of Nanoscience and Nanotechnology 8, no. 2 (February 1, 2008): 695–701. http://dx.doi.org/10.1166/jnn.2008.b270.

Full text

Abstract:

Stable superparamagnetic magnetite (Fe3O4) nanoparticles were synthesized via co-precipitation in the presence of poly(methacrylic acid) (PMAA) in aqueous solution. The polymer coated Fe3O4 nanoparticles were characterized using transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction, thermal analysis, and vibrating sample magnetometry (VSM) techniques. These measurements reveal the presence of magnetite nanoparticles with a size of approximately 8 nm inside the PMAA matrix. The magnetization value of these superpara-magnetic nanoparticles at room temperarure and 7 T was measured as about 40 emu/g. PMAA-coated Fe3O4 nanoparticles were further assembled with Ni-chelate through a reaction between a primary amine-bearing NTA (nitrilotriacetic acid) ligand and carboxy-functional groups of PMAA. NTA-PMAA-coated magnetite nanoparticles were then loaded with nickel ions and characterized using FTIR. The average amount of binded Ni on the surface of the NTA-modified PMAA coated Fe3O4 was calculated as 1.65 ± 0.3 × 10−6 mol nickel(II) ions per g of the magnetic particles from the inductively coupled plasma optical emission spectroscopy (ICP-OES) measurements.

APA, Harvard, Vancouver, ISO, and other styles

18

Luchini, C., S. Leguay, J. Aupiais, C. Cannes, and C. Le Naour. "Complexation of protactinium(v) with nitrilotriacetic acid: a study at the tracer scale." New Journal of Chemistry 42, no. 10 (2018): 7789–95. http://dx.doi.org/10.1039/c7nj04683a.

Full text

Abstract:

Complexation of Pa(v) with nitrilotriacetic acid (NTA) in aqueous solution (1 M (Na,H)ClO₄) was studied by solvent extraction at different acidities (pcH = 0.6; 1.0; 2.0 and 2.5) with the element at the tracer scale (C_Pa< 10⁻¹⁰M).

APA, Harvard, Vancouver, ISO, and other styles

19

Shulyak, Alexandra T., Evgeniy O. Bortnikov, Alexey S. Kubasov, Nikita A. Selivanov, Alexey A. Lipengolts, Andrey P. Zhdanov, Alexander Yu Bykov, Konstantin Yu Zhizhin, and Nikolai T. Kuznetsov. "Synthesis of Hafnium(IV) Polyaminoacetates." Molecules 26, no. 12 (June 18, 2021): 3725. http://dx.doi.org/10.3390/molecules26123725.

Full text

Abstract:

The interaction of hafnium(IV) salts (oxide-dichloride, chloride, and bromide) with nitrilotriacetic acid (NTA), diethylenetriamminepentaacetic acid (DTPA), 1,2-diaminocyclohexanetetraacetic acid (CDTA), 1,3-dipropylmino-2-hydroxy N,N,N′,N′-tetraacetic acid (dpta), and N-(2-hydroxyethyl)ethylenediamine triacetic acid (HEDTA) has been studied. The corresponding complexes Na2[Hf(NTA)2]·3H2O (1), Na[HfDTPA]·3H2O (2), [HfCDTA(H2O)2] (3), and Na[Hf2(dpta)2]·7.5H2O·0.5C2H5OH (4) have been isolated and characterized and their structures have been determined by single crystal X-ray diffraction. Biological studies of [HfCDTA(H2O)2] have shown that in 5% glucose solution this complex has low toxicity and good contrasting ability.

APA, Harvard, Vancouver, ISO, and other styles

20

Chen, Dian, Arthur E. Martell, and Derek McManus. "Studies on the mechanism of chelate degradation in iron-based, liquid redox H2S removal processes." Canadian Journal of Chemistry 73, no. 2 (February 1, 1995): 264–74. http://dx.doi.org/10.1139/v95-036.

Full text

Abstract:

Available data on the oxidation of nitrilotriacetic acid (NTA), ethylenedinitrilotetraacetic acid (EDTA), N-hydroxyethylethylenediaminetriacetic acid (HEDTA), and other aminopolycarboxylate chelating agents are reviewed and the intermediates and products of the oxidative degradation of each chelating agent are described and compared. The oxidation of these chelating agents occurs during the reoxidation of the ferrous chelate to the ferric chelate, during which a Fenton type side reaction occurs in which hydrogen peroxide is formed and which in turn generates the hydroxyl radical by reaction with ferrous ion. The site of oxidative attack by the hydroxyl radical on these ligands seems to be the -CH2- groups α to the carboxylate groups, as well as the -CH2- groups in the ethylene bridges between the nitrogens. The evidence for the implication of the hydroxyl radical as the active oxidant is discussed, and the use of phenyl-tert-butylnitrone (PBN) as the trapping agent for the hydroxyl radical is described. The use of chelating agents as Fe3+/Fe2+ redox catalysts for the oxidation of H2S to sulfur that are less reactive toward the hydroxyl radical is recommended. Keywords: chelate degradation, H2S oxidation, nitrilotriacetic acid (NTA), ethylenedinitrilotetraacetic acid (EDTA), N-hydroxyethylethylenediaminetriacetic acid (HEDTA).

APA, Harvard, Vancouver, ISO, and other styles

21

Carbonaro, Richard F., and Alan T. Stone. "Oxidation of CrIII aminocarboxylate complexes by hydrous manganese oxide: products and time course behaviour." Environmental Chemistry 12, no. 1 (2015): 33. http://dx.doi.org/10.1071/en14041.

Full text

Abstract:

Environmental context Oxidation of CrIII (trivalent chromium) to CrVI (hexavalent chromium) is of environmental concern because CrVI is a known mutagen and carcinogen. Our results show that hydrous manganese oxide (HMO) is capable of oxidising soluble CrIII complexed with iminodiacetic acid and nitrilotriacetic acid to CrVI at appreciable rates. CrVI production from soluble CrIII organic complexes is therefore expected to occur in natural and engineered systems that contain HMO. Abstract MnIII,IV (hydr)oxides are believed to be the principal oxidants of CrIII in the subsurface. In nearly all previous work on this subject, the CrIII reactant was prepared from inorganic salts (e.g. nitrate, chloride, sulfate). In our present work, CrIII complexes with the synthetic chelating agents iminodiacetic acid (IDA) and nitrilotriacetic acid (NTA) were reacted with hydrous manganese oxide (HMO) over a wide pH range to examine rates of reaction and product distribution. Capillary electrophoresis was used to quantify changes in reactant (CrIII–IDA and CrIII–NTA) and product (CrVI, free IDA and free NTA) concentrations as a function of time. In addition, a small number of experiments were performed using solutions prepared from CrIII alum (KCr(SO4)2·12H2O(s)) as the CrIII reactant. CrIII–IDA and CrIII–NTA were oxidised to CrVI, but rates were considerably lower than those obtained using inorganic CrIII. Within the timescales of our experiments, complete conversion of CrIII–NTA occurred at pH >7, but not under moderately acidic conditions, even when there was a large stoichiometric excess of HMO. MnCl2 addition experiments indicated that the observed reaction inhibition was attributable to MnII generation during the reaction. Our previous work has shown that citric acid, IDA, NTA and ethylenediaminetetraacetic acid solubilise CrIII from amorphous Cr(OH)3(s) at appreciable rates. The results of this study show that HMO is capable of oxidising the resulting soluble CrIII complexes, providing a viable mechanism for CrIII oxidation to CrVI over a wide pH range.

APA, Harvard, Vancouver, ISO, and other styles

22

Watson, Douglas S., Virginia M. Platt, Limin Cao, Vincent J. Venditto, and Francis C. Szoka. "Antibody Response to Polyhistidine-Tagged Peptide and Protein Antigens Attached to Liposomes via Lipid-Linked Nitrilotriacetic Acid in Mice." Clinical and Vaccine Immunology 18, no. 2 (December 15, 2010): 289–97. http://dx.doi.org/10.1128/cvi.00425-10.

Full text

Abstract:

ABSTRACTParticulate delivery systems enhance antibody responses to subunit antigens. However, covalent attachment of protein antigens can disrupt protein structure and mask critical epitopes, altering the antibody response to the antigen. In this report, we evaluate noncovalent metal chelation via nitrilotriacetic acid (NTA) as a nondestructive method to attach peptide and protein antigens to liposomes. Two model antigens, ovalbumin (OVA) and a peptide derived from the membrane-proximal region of HIV-1 gp41 (N-MPR), were polyhistidinylated and attached to liposomes via monovalent NTA (mono-NTA;KD[equilibrium dissociation constant], ∼10 μM), trivalent NTA (tris-NTA;KD, ∼1 nM), or a covalent linkage. Attachment of N-MPR, but not OVA, to liposomes via an NTA lipid elicited stronger antibody responses in BALB/c mice than a formulation in which unassociated antigen was simply admixed with control liposomes lacking NTA. However, the tris-NTA linkage did not increase antibody responses to either N-MPR or OVA compared to the level for the mono-NTA linkage, despite the greater liposomal association of the antigen. For both antigens, covalently attaching them to a lipid elicited significantly stronger antibody responses than NTA-anchored antigens (OVA titer, 3.4 × 106versus 1.4 × 106to 1.6 × 106[P< 0.001]; N-MPR titer, 4.4 × 104versus 5.5 × 102to 7.6 × 102[P< 0.003]). The data indicate that NTA linkages may increase antibody titers to weak antigens such as N-MPR, but NTA-mediated attachment remains inferior to covalent conjugation. Moreover, enhancements in antigen-liposome affinity do not result in increased antibody titers. Thus, additional improvements of NTA-mediated conjugation technology are necessary to achieve an effective, nondestructive method for increasing the humoral response to antigens in particulate vaccines.

APA, Harvard, Vancouver, ISO, and other styles

23

Wendt, R. H., A. G. Payne, and W. D. Hopping. "Nitrilotriacetic acid (NTA) environmental monitoring program in Indiana: 1979 to 1983." Environmental Toxicology and Chemistry 7, no. 4 (April 1988): 275–90. http://dx.doi.org/10.1002/etc.5620070404.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Matsuda, T. "Degradation of nitrilotriacetic acid (NTA) by oxidation with lead dioxide suspension." Talanta 33, no. 7 (July 1986): 614–16. http://dx.doi.org/10.1016/0039-9140(86)80140-0.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Larson, Robert J., and Roy M. Ventullo. "Kinetics of biodegradation of nitrilotriacetic acid (NTA) in an estuarine environment." Ecotoxicology and Environmental Safety 12, no. 2 (October 1986): 166–79. http://dx.doi.org/10.1016/0147-6513(86)90054-0.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Leibold, E., K. Deckardt, W. Mellert, B. Potthoff-Karl, O. Grundler, and R. Jäckh. "NTA and Fe(III)NTA: differential patterns of renal toxicity in subchronic studies." Human & Experimental Toxicology 21, no. 8 (August 2002): 445–52. http://dx.doi.org/10.1191/0960327102ht273oa.

Full text

Abstract:

Differential patterns in terms of nephropathology and 8-hydroxyguanine formation in the course of oral 28-day studies were observed with nitrilotriacetic acid (NTA) and FeNTA. FeNTA, but not NTA, caused enhanced 8-hydroxyguanine formation in kidney DNA after oral and intraperitoneal administration. Enhanced lipid peroxidation in the kidney homogenate was observed with FeNTA as well as with NTA. For NTA, the low dose (9 mg/kg per day) was without adverse effect. The kidney toxicity of oral FeNTA (50, 200, and 1000 mg/ kg per day) was only mild, 50 mg/ kg per day; however, it still led to an increased 8-hydroxyguanine content. The relevance of Iron(III) (Fe(III)) or Fe(III)NTA formation as a relevant mediator of NTA-related toxicity was excluded on the basis of these data. Also, a thermodynamic consideration presented here, supports the view that zinc (Zn), and not Fe, is likely to mediate the tubular cell cytotoxicity of NTA.

APA, Harvard, Vancouver, ISO, and other styles

27

Borowiec, Magdalena, Marta Huculak, Krystyna Hoffmann, and Józef Hoffmann. "Biodegradation of selected substances used in liquid fertilizers as an element of Life Cycle Assessment." Polish Journal of Chemical Technology 11, no. 1 (January 1, 2009): 1–3. http://dx.doi.org/10.2478/v10026-009-0001-6.

Full text

Abstract:

Biodegradation of selected substances used in liquid fertilizers as an element of Life Cycle Assessment The results of laboratory investigations into the aerobic biodegradation of chelating compounds in water medium under static test conditions are presented. It was found that nitrilotriacetic acid (NTA) and glutamic acid diacetic acid (GLDA) are more readily biodegradable than ethylenediaminetetraacetic acid (EDTA) commonly used in the production of liquid fertilizers. Biodegradation was evaluated on the basis of compound decay and changes in COD.

APA, Harvard, Vancouver, ISO, and other styles

28

Hart, Genna, Marina Koether, Thomas McElroy, and Sigurdur Greipsson. "Evaluation of Chelating Agents Used in Phytoextraction by Switchgrass of Lead Contaminated Soil." Plants 11, no. 8 (April 8, 2022): 1012. http://dx.doi.org/10.3390/plants11081012.

Full text

Abstract:

Soil lead (Pb) contamination is a recognized environmental and global health problem. Phytoextraction of Pb using switchgrass (Panicum virgatum L.), a second-generation biofuel crop, is typically enhanced by soil chelation. The effectiveness of four different chelating agents, phytic acid (inositol hexaphosphate), citric acid, NTA (nitrilotriacetic acid), and EDTA (ethylenediaminetetraacetic acid) was examined in pot culture. Plants treated with EDTA (1 mM) showed significantly higher shoot Pb concentrations compared to control plants and plants treated with other chelates. Lead-solubility following phytoextraction was examined by soil washing using 0.01 and 0.05 M acetic acid as an extractant solution revealed no significant differences in Pb concentrations in soil among different chelate treatments and control. Furthermore, the effects of different concentrations (1, 2, 5 and 10 mM) of NTA on Pb phytoextraction of switchgrass were examined. Plants receiving 5 mM and 10 mM NTA had significantly higher foliage concentrations of Pb compared to plants treated with lower levels (1 and 2 mM) of NTA. Moreover, the effect of NTA application alone was significantly improved by a combined application of Triton X-100, an alkyl polyglucoside (APG); the Pb concentration in the foliage of switchgrass was more than doubled when treated with NTA combined with APG. The use of NTA combined with APG has great potential in improving phytoextraction efficiencies of switchgrass on Pb-contaminated soils.

APA, Harvard, Vancouver, ISO, and other styles

29

Hales, S. G., and W. Ernst. "Biologischer Abbau von NTA im Weser- Ästuar / Biodegradation of Nitrilotriacetic Acid (NTA) in Weser Estuarine Water." Tenside Surfactants Detergents 28, no. 1 (January 1, 1991): 15–21. http://dx.doi.org/10.1515/tsd-1991-280108.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Huang, Zhaohua, Joshua I. Park, Douglas S. Watson, Peter Hwang, and Francis C. Szoka. "Facile Synthesis of Multivalent Nitrilotriacetic Acid (NTA) and NTA Conjugates for Analytical and Drug Delivery Applications." Bioconjugate Chemistry 17, no. 6 (November 2006): 1592–600. http://dx.doi.org/10.1021/bc0602228.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Kamalasekaran, Kavitha. "Potentiometric Titration of Vanadium (V) with Iron (II) in the Presence of NTA and DTPA Using Dry-Cell Graphite Electrode." Revista de Chimie 72, no. 3 (July 29, 2021): 144–58. http://dx.doi.org/10.37358/rc.21.3.8445.

Full text

Abstract:

A sensitive potentiometric titration for vanadium (V) based effect of ligands such as nitrilotriacetic acid (NTA) and diethylenetriaminepenta-acetic acid (DTPA) are reviewed. The potential iron system decreased the presence of NTA and DTPA. In this case, iron (III) increased with respect to the vanadium (IV) volume. The production of iron (III)-ligand complex has increased. This result suggested that the formation of V(V)-NTA and V(V)-DTPA complexes were less favoured than that of V(IV)-NTA and V(IV)-DTPA complexes. The calculated correlation coefficients (r) conveyed the effectiveness of the graphite electrode as the indicator electrode for the potentiometric titrations. On comparing the potential jump values, the extent of potential caused by DTPA was found to be more than that of NTA. The utilization of graphite electrode has facilitated the potentiometric titration by significantly causing larger potential jump. This method was precise and accurate as no interference of foreign ions was observed. Hence, the approach could be applied to the vanadium (V) of any samples.

APA, Harvard, Vancouver, ISO, and other styles

32

Li, YongJin. "Calorimetric Sensor for Ethanol Using Ni2+-nitrilotriacetic Acid (NTA) Resin Immobilized Alcohol Dehydrogenase (ADH)." Current Analytical Chemistry 16, no. 6 (August 13, 2020): 795–99. http://dx.doi.org/10.2174/1573411015666190617110233.

Full text

Abstract:

Background: A simple, fast and economic analytical method for the determination of ethanol is important for clinical, biological, forensic and physico-legal purposes. Methods: Ni2+-NTA resin was used as an immobilization matrix for the simple one-step purification/ immobilization of his6-tagged ADH. Different alcohols with a concentration range of 0.5-50% V/V, namely methanol, ethanol and propanol were measured using prepared ADH enzyme thermistor. The ethanol content of Tsingtao beer was tested as a real sample containing alcohol. Reproducibility and stability of prepared ADH enzyme thermistor were also investigated by repeated measurements. Results: In comparison to the controlled pore glass (a common used support for the immobilization of enzyme) used in thermal biosensor, the use of Ni2+-NTA resin not only led to simple one-step purification/ immobilization by his6-tagged ADH binding to Ni2+-NTA resin, but also made the immobilizing supports reusable. The prepared biosensor can be used to determine ethanol and methanol by the calorimetric measurement. A linear range of 1 -32% (V/V) and 2-20% (V/V) was observed for ethanol and methanol, respectively. The detection limits were 0.3% (V/V) and 1% (V/V) for ethanol and methanol, respectively. The tested ethanol concentration of Tsingtao beer was 4.5% V/V, which is comparable with the labeled alcohol by volume (ABV) 4.80%. Conclusion: Ni2+-NTA resin, as an immobilization matrix in ET sensor, provides a simple one-step purification/immobilization for His6-tagged recombinase and a reusable immobilization matrix. The prepared biosensor exhibits good repeatability and stability. Such a new biosensor shows great promise for rapid, simple, and cost-effective analysis of ethanol and methanol, both in qualitative and in quantitative tests.

APA, Harvard, Vancouver, ISO, and other styles

33

Unger, M., and E. Mainka. "Investigations of the stability of nitrilotriacetic acid (NTA) in solutions containing uranium." Fresenius' Zeitschrift für analytische Chemie 327, no. 1 (January 1987): 14. http://dx.doi.org/10.1007/bf00474523.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Teleb, S. M., E. M. Nour, M. A. F. Elmosallamy, and H. M. Shalaby. "Synthesis and characterization of some uranyl and zirconyl nitrilotriacetic acid (NTA) chelates." Journal of Coordination Chemistry 58, no. 15 (October 1, 2005): 1261–69. http://dx.doi.org/10.1080/00958970500038738.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Costa, R., A. Russo, M. Zordan, F. Pacchierotti, A. Tavella, and A. G. Levis. "Nitrilotriacetic acid (NTA) induces aneuploidy in drosophila and mouse germ-line cells." Environmental Mutagenesis 12, no. 4 (1988): 397–407. http://dx.doi.org/10.1002/em.2860120408.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Egli, T. "Biodegradation of synthetic chelating agents with special reference to nitrilotriacetic acid (NTA)." Journal of Chemical Technology & Biotechnology 55, no. 4 (April 24, 2007): 404–6. http://dx.doi.org/10.1002/jctb.280550421.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Abd. Rahim, Siti Fadhilah, Normala Masrom, Muhamad Cyrill Kamal, Khairul Basyar Baharudin, Norliza Abu Bakar, and Noor Azmi Shaharuddin. "Assessment of Selected Herbicides and Chelating Agents in Water Using Gas Chromatography-Electron Capture Detector (GC-ECD)." Bioremediation Science and Technology Research 3, no. 1 (November 2, 2015): 26–30. http://dx.doi.org/10.54987/bstr.v3i1.250.

Full text

Abstract:

Water contamination by herbicides and chelating agents is increasing mainly due to theÂ increasing agricultural activities. Water contamination by these compounds has become aÂ concern due to their adverse effects to the environment and humans. Seven sampling sites ofÂ water sources in Selangor and Johor were chosen for the study. Contamination level ofÂ Mecoprop (MCCP), Nitrilotriacetic acid (NTA) and Ethylenediaminetetraacetic acid (EDTA) inÂ these water body areas was determined by using Gas Chromatography-Electron CaptureÂ Detector (GC-ECD). Our results indicated that water samples of Sungai Melot in SelangorÂ showed the highest presence of EDTA. MCCP was detected at a high level at Sungai SarangÂ Buaya, Johor while NTA showed similar level of concentration at three different sites, LadangÂ 10, Ladang Sayur and Mardi, Selangor

APA, Harvard, Vancouver, ISO, and other styles

38

Duret, Damien, Zofia Haftek-Terreau, Matthieu Carretier, Catherine Ladavière, Marie-Thérèse Charreyre, and Arnaud Favier. "Fluorescent RAFT polymers bearing a nitrilotriacetic acid (NTA) ligand at the α-chain-end for the site-specific labeling of histidine-tagged proteins." Polymer Chemistry 8, no. 10 (2017): 1611–15. http://dx.doi.org/10.1039/c6py02222g.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Prasad, Lakshmi, Tajdar Husain Khan, Tamanna Jahangir, and Sarwat Sultana. "Effect of gallic acid on renal biochemical alterations in male Wistar rats induced by ferric nitriloacetic acid." Human & Experimental Toxicology 25, no. 9 (September 2006): 523–29. http://dx.doi.org/10.1191/0960327106het652oa.

Full text

Abstract:

The present study is an effort to identify a potent chemopreventive agent against various diseases (including cancer) in which oxidative stress and cell proliferation plays an important causative role. This study was designed to investigate the effect of gallic acid against ferric nitrilotriacetic acid (Fe-NTA)-induced carcinogen/drug metabolizing phase I and phase II enzymes, anti-oxidative parameters, kidney markers, tumour promotion markers and lipid peroxidation (LPO) in kidney of male Wistar rats. Fe-NTA (9 mg Fe/kg body weight, intraperitoneally) caused significant depletion in the detoxification and antioxidant enzyme armoury with concomitant elevation in renal LPO, serum creatinine, blood urea nitrogen, hydrogen peroxide generation, ornithine decarboxylase activity and [3H]thymidine incorporation into renal DNA. However, pretreatment of animals with gallic acid (10 and 20 mg/kg body weight) resulted in a significant decrease in the levels of the parameters measured (P < 0.001). Renal glutathione content (P < 0.001), glutathione metabolizing enzyme (P < 0.001) and antioxidant enzyme levels were also recovered to a significant level (P < 0.001). The enhanced reduced glutathione level and enzyme activities involved in xenobiotic metabolism and maintaining antioxidant status of cells are suggestive of a chemopreventive efficacy of gallic acid against Fe-NTA-mediated oxidative stress, toxicity and cell proliferative response in Wistar rats.

APA, Harvard, Vancouver, ISO, and other styles

40

Nishida, Yuzo, and Sayo Ito. "Iron(III) Complexes with Hydrogen Peroxide which Can Discriminate Two Reaction Types; Oxidation (H-Atom Abstraction) and Oxygenation Reaction." Zeitschrift für Naturforschung C 50, no. 3-4 (April 1, 1995): 205–8. http://dx.doi.org/10.1515/znc-1995-3-408.

Full text

Abstract:

Iron(III)-NTA (nitrilotriacetic acid) solution shows high activity for oxidative degradation of 2′-deoxyribose in the presence of hydrogen peroxide, whereas its activity of Fe(III)-TFDA (2-aminomethyltetrahydrofuran-N,N-diacetic acid) is negligible under the same experimental conditions; however the latter solution exhibits abnormally higher reactivity for oxygenation reaction at 8-position of 2′-deoxyguanosine than other iron(III) chelates examined. These results suggest that oxidative degradation of deoxyribose and the oxygenation of deoxyguanosine are caused by a different iron(III)-peroxide species.

APA, Harvard, Vancouver, ISO, and other styles

41

Ciornea, Victor, and Aurelian Gulea. "Synthesis and Physico-Chemical Studies of Heterometallic Nitrilotriacetates of Chromium(III) with Some 3d Metals." Chemistry Journal of Moldova 1, no. 1 (December 2006): 84–87. http://dx.doi.org/10.19261/cjm.2006.01(1).05.

Full text

Abstract:

Heterometallic complexes of chromium (III) with some 3d metals have been synthesized based on nitrilotriacetic acid (H3nta), like M(bpy)2Cr2(OH)2(nta)2·nH2O, where M = Mn2+, Co2+, Ni2+ and Zn2+; bpy = α,α′- bipyridine; n = 8 or 9. Their chemical composition has been determined from the results of the elemental analysis and thermogravimetric study. The coordination modes of the nta3 ̄ ligand and the type of chemical bonds have been proposed basing on IR spectra.

APA, Harvard, Vancouver, ISO, and other styles

42

Falla, J. A., E. Petit, and J. C. Block. "Extractibility of Cadmium, Copper and Zinc from Contaminated Biomass using NTA (Nitrilotriacetic Acid)." Environmental Technology 16, no. 7 (July 1995): 685–91. http://dx.doi.org/10.1080/09593331608616308.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Russo, A., F. Pacchierotti, B. Bassani, and A. G. Levis. "Lack of induction of somatic aneuploidy in the mouse by nitrilotriacetic acid (NTA)." Mutation Research Letters 226, no. 2 (June 1989): 111–14. http://dx.doi.org/10.1016/0165-7992(89)90052-3.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Randt, C., R. Wittlinger, and W. Merz. "Analysis of nitrilotriacetic acid (NTA), ethylenediaminetetraacetic acid (EDTA) and diethylenetriaminepentaacetic acid (DTPA) in water, particularly waste water." Fresenius' Journal of Analytical Chemistry 346, no. 6-9 (1993): 728–31. http://dx.doi.org/10.1007/bf00321281.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Fears, Thomas R., Robert M. Elashoff, and Marvin A. Schneiderman. "The Statistical Analysis of a Carcinogen Mixture Experiment. Ii. Carcinogens with Different Target Organs, N-Methyl-N'-Nitro-N-Nitrosoguanidine, N-Butyl-N-(4-Hydroxybutyl)Nitrosamine, Dipentylnitrosamine, and Nitrilotriacetic Acid." Toxicology and Industrial Health 4, no. 2 (April 1988): 221–55. http://dx.doi.org/10.1177/074823378800400206.

Full text

Abstract:

This paper describes factorial experiments designed to determine whether two carcinogens that act on different organ systems act synergistically to produce cancers in Fischer 344 rats. Four carcinogens, N-methyl-N'-nitrosoguanidine (MNNG), N-butanol-N-butylnitrosamine (NBBN), nitrilotriacetic acid (NTA), and dipentylnitrosamine (DPN) were studied in pairwise combinations. Each of the six possible pairs was studied by means of a 4 × 4 factorial experiment, each agent being fed at zero and at three non-zero doses. Methods of analysis designed explicitly for this study were derived to study interaction. These methods were supplemented by standard statistical methods appropriate for single agent studies. Antagonism was demonstrated in some chemical mixtures containing NTA. Other chemical mixtures did not interact. Findings for male and female animals were generally, but not always, in agreement.

APA, Harvard, Vancouver, ISO, and other styles

46

Riedel, H. D., A. J. Remus, B. A. Fitscher, and W. Stremmel. "Characterization and partial purification of a ferrireductase from human duodenal microvillus membranes." Biochemical Journal 309, no. 3 (August 1, 1995): 745–48. http://dx.doi.org/10.1042/bj3090745.

Full text

Abstract:

Reduction of ferric iron in the presence of HuTu 80 cells or duodenal microvillus membranes (MVMs) was investigated. With both systems, NADH-dependent reduction of Fe3+/NTA (nitrilotriacetic acid) was demonstrated, using the ferrous iron chelator ferrozine. Uptake of Fe3+ from Fe3+/NTA by HuTu 80 cells was strongly inhibited by addition of ferrozine, indicating that Fe2+ is the substrate for the iron uptake system. With isolated plasma membranes it is shown that the reductase activity is sensitive to trypsin and incubation at 65 degrees C. The reductase activity could be extracted from the plasma membrane and partially purified by ammonium sulphate precipitation and isoelectric focusing. From the purification and inhibition characteristics we conclude that reduction of ferric iron on the surface of duodenal plasma membranes is catalysed by a membrane protein.

APA, Harvard, Vancouver, ISO, and other styles

47

Costa, Rodolfo, Giuliana Strolego, and Angelo Gino Levis. "Mutagenicity of lead chromate in Drosophila melanogaster in the presence of nitrilotriacetic acid (NTA)." Mutation Research/Genetic Toxicology 204, no. 2 (February 1988): 257–61. http://dx.doi.org/10.1016/0165-1218(88)90097-3.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Celotti, L., D. Furlan, P. Ferraro, and A. G. Levis. "DNA damage and repair induced in vitro by nitrilotriacetic acid (NTA) in human lymphocytes." Mutation Research Letters 209, no. 3-4 (November 1988): 149–54. http://dx.doi.org/10.1016/0165-7992(88)90033-4.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Mutafela, Richard Nasilele, Fei Ye, Yahya Jani, Joydeep Dutta, and William Hogland. "Sustainable extraction of hazardous metals from crystal glass waste using biodegradable chelating agents." Journal of Material Cycles and Waste Management 24, no. 2 (January 24, 2022): 692–701. http://dx.doi.org/10.1007/s10163-022-01351-7.

Full text

Abstract:

AbstractExtraction of hazardous metals from dumped crystal glass waste was investigated for site decontamination and resource recovery. Mechanically activated glass waste was leached with biodegradable chelating agents of ethylenediamine-N,N′-disuccinic acid (EDDS) and nitrilotriacetic acid (NTA), where the concentration and reaction time were determined by using Box–Wilson experimental design. Hazardous metals of lead (Pb), arsenic (As), antimony (Sb) and cadmium (Cd) with concentrations higher than regulatory limits were extracted wherein the extraction yield was found to vary Pb > Sb > As > Cd. Extraction was influenced more by type and concentration of chelator rather than by reaction time. A maximum of 64% of Pb could be extracted by EDDS while 42% using NTA. It is found that increase of chelator concentrations from 0.05 M to 1 M did not show improved metal extraction and the extraction improved with reaction time until 13 h. This study provides sustainable alternative for treating hazardous glass waste by mechanical activation followed by extraction using biodegradable chelator, instead of acid leaching. Graphical abstract

APA, Harvard, Vancouver, ISO, and other styles

50

Li, Chang, Gang Wu, Rujiang Ma, Yong Liu, Ying Liu, Juan Lv, Yingli An, and Linqi Shi. "Nitrilotriacetic Acid (NTA) and Phenylboronic Acid (PBA) Functionalized Nanogels for Efficient Encapsulation and Controlled Release of Insulin." ACS Biomaterials Science & Engineering 4, no. 6 (October 25, 2017): 2007–17. http://dx.doi.org/10.1021/acsbiomaterials.7b00546.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'Nitrilotriacetic acid (NTA)'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles