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Journal articles on the topic 'Ethylenediaminetetraacetic acid (EDTA)'

Author: Grafiati

Published: 4 June 2021

Last updated: 21 February 2023

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1

Mohammadi, Zahed, Sousan Shalavi, and Hamid Jafarzadeh. "Ethylenediaminetetraacetic acid in endodontics." European Journal of Dentistry 07, S 01 (September 2013): S135—S142. http://dx.doi.org/10.4103/1305-7456.119091.

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ABSTRACTEthylenediaminetetraacetic acid (EDTA) is a chelating agent can bind to metals via four carboxylate and two amine groups. It is a polyamino carboxylic acid and a colorless, water-soluble solid, which is widely used to dissolve lime scale. It is produced as several salts, notably disodium EDTA and calcium disodium EDTA. EDTA reacts with the calcium ions in dentine and forms soluble calcium chelates. A review of the literature and a discussion of the different indications and considerations for its usage are presented.

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2

Coyne, Erwin, Harry L. Messmore, Jeanine M. Walenga, Jawed Fareed, and William H. Wehrmacher. "Ethylenediaminetetraacetic Acid (EDTA) in Heparin." Thrombosis Research 90, no. 5 (June 1998): 245–46. http://dx.doi.org/10.1016/s0049-3848(98)00063-2.

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3

Chen, Min, and R. Stephen Reid. "Solution speciation in the aqueous Na(I)–EDTA and K(I)–EDTA systems." Canadian Journal of Chemistry 71, no. 5 (May 1, 1993): 763–68. http://dx.doi.org/10.1139/v93-100.

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Speciation in the aqueous sodium(I) – ethylenediaminetetraacetic acid and potassium(I) – ethylenediaminetetraacetic acid equilibrium systems was investigated by automated gravimetric potentiometric titration. It was found that in both cases, particularly below neutral pH values, speciation includes a previously uncharacterized diprotonated complex. All formation and acid dissociation constants were measured for the full systems. The validity of previous literature equilibrium constants, which are based on incomplete equilibrium models, is discussed.

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4

Nakatsu, K., M. Vandenberghe, S. Kobus, J. Kawamoto, J. F. Brien, and G. S. Marks. "Endothelium-dependent relaxation of rabbit aorta by acetylcholine requires ethylenediaminetetraacetic acid." Canadian Journal of Physiology and Pharmacology 64, no. 7 (July 1, 1986): 1050–52. http://dx.doi.org/10.1139/y86-179.

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Experiments were conducted to determine if ethylenediaminetetraacetic acid (EDTA) was essential for the acetylcholine (ACh)-induced relaxation of blood vessels. Isolated rabbit aortic rings were prepared for recording isometric tension. They were maintained in Krebs bicarbonate solution with various concentrations of EDTA. With EDTA concentrations of 0 or 0.003 mM, no ACh-induced relaxation was observed; only the contractile effect of ACh was seen. With 0.03 and 0.30 mM EDTA, Ach induced relaxation with EC50 values of 0.11 and 0.098 μM, respectively. Under the experimental conditions used, EDTA was essential for demonstration of ACh-induced relaxation.

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5

Andreev, Irina, Valeria Gabechaya, and Oksana Smelykh. "Evaluation of the spring rapeseed use efficiency in the technology of induced nickel phytoextraction under conditions of polluted Albic Luvisol." АгроЭкоИнфо 4, no. 52 (August 18, 2022): 17. http://dx.doi.org/10.51419/202124417.

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A greenhouse experiment was conducted to study the effect of chelating agent disodium salt of ethylenediaminetetraacetic acid (EDTA) on nickel phytoextraction with rapeseed plants (Brassica napus (L.) subsp. oleifera Metzg.) as test crop in the contaminated with Ni (40 and 120 mg/kg) Albic Luvisol. The use of EDTA at a dose of 0.5 mmol/kg of soil increased the nickel uptake by plants by 1.9 - 2.4 times compared to EDTA unamended soil. Due to the absence of phytotoxic effect, values of uptake, bioaccumulation and translocation coefficients, the highest efficiency of nickel phytoextraction by rapeseed plants was achieved at doses of metal in the soil at the level of approximately permissible concentration (40 mg/kg). Keywords: PHYTOREMEDIATION, INDUCED PHYTOEXTRACTION, NICKEL, CHELATING AGENT, DISODIUM SALT OF ETHYLENEDIAMINETETRAACETIC ACID (EDTA), SPRING RAPESEED, POLLUTION, ALBIC LUVISOL

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6

Kopermsub, P., V. Mayen, and C. Warin. "Nanoencapsulation of Nisin and Ethylenediaminetetraacetic Acid in Niosomes and Their Antibacterial Activity." Journal of Scientific Research 4, no. 2 (April 27, 2012): 457. http://dx.doi.org/10.3329/jsr.v4i2.9409.

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Ethylenediaminetetraacetic acid or EDTA was used complementarily with nisin to give a synergistic antibacterial effect against Gram positive and negative bacteria. Nisin and EDTA were encapsulated in nonionic surfactant vesicles or niosomes. Sorbitan monooleate and polyethylene glycol were precursors in preparation of niosomes. Size reduction of niosomes was conducted via extrusion through polycarbonate membrane with pore size of 200 nm. Diameters of prepared blank niosomes and nisin-EDTA-encapsulated niosomes were approximately 130 nm and 270 nm, respectively. Bilayer structure of niosomes was observed from negative staining-transmission electron microscopic images. Long-termed investigation of antimicrobial activity of nisin-EDTA-encapsulated niosomes and free nisin/EDTA were conducted against Staphylococcus aureus and Escherichia coli. Bacterial counts denoted a slow release of nisin-EDTA-encapsulated niosomes overtime whilst free nisin/EDTA gave a sudden bactericidal activity. Due to that free nisin/EDTA was immediately exploited at the beginning, bacterial counts then tended towards higher during the latter time of antimicrobial activity test. Keywords: antibacterial; EDTA; Escherichia coli; niosomes; nisin; Staphylococcus aureus. © 2012 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved. doi: http://dx.doi.org/10.3329/jsr.v4i2.9407 J. Sci. Res. 4 (2), 457-465 (2012)

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7

Su, En-Chin, Ju-Ting Lee, Yi-Jean Gong, Bing-Shun Huang, and Ming-Yen Wey. "Photocatalytic conversion of ethylenediaminetetraacetic acid dissolved in real electroplating wastewater to hydrogen in a solar light-responsive system." Water Science and Technology 77, no. 12 (June 18, 2018): 2851–57. http://dx.doi.org/10.2166/wst.2018.276.

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Abstract A sustainable and multifunctional photocatalysis-based technology has been established herein for simultaneous hydrogen generation and oxidation of ethylenediaminetetraacetic acid (EDTA) in real electroplating wastewater. When the photocatalyst concentration was 4 g/L and electroplating wastewater pH was 6, optimal adsorptions of EDTA2−, H+, and H2O were observed, while hydrogen generation efficiency reached 305 µmol/(h g). Owing to EDTA oxidation and occupation of the active sites of the photocatalyst by Ni ions or Ni-EDTA chelates, the charge separation and adsorptions of H+ and H2O decreased, reducing hydrogen generation efficiency with time. The lower EDTA and Ni concentrations in treated wastewater showed that photocatalytic conversion of EDTA in real electroplating wastewater to enhance hydrogen generation efficiency can be a practical alternative energy production technology. This study provided a novel idea to enhance the value of electroplating wastewater, to build a hydrogen generation route with no consumption of a valuable resource, and to reduce EDTA and Ni concentrations in electroplating wastewater.

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8

Moonprasith, N., A. Poonsrisawat, V. Champreda, C. Kongkaew, S. Loykulnant, and K. Suchiva. "Deproteinization of Nonammonia and Ammonia Natural Rubber Latices by Ethylenediaminetetraacetic Acid." Advances in Materials Science and Engineering 2017 (2017): 1–7. http://dx.doi.org/10.1155/2017/1516945.

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Deproteinized natural rubber (DPNR) was made from sodium hydroxymethylglycinate latex (SH-latex) and ammonia latex (NH3-latex) by mixing with different forms of ethylenediaminetetraacetic acid (EDTA) in the presence of sodium dodecyl sulfate (SDS). The mixtures were stirred at room temperature followed by centrifugation to separate the denatured proteins. The optimized reaction contained 0.01 wt% ethylenediaminetetraacetic acid tetrasodium (EDTA-4Na) with 1% SDS. The nitrogen contents of the DPNR from SH-latex and NH3-latex were reduced to 0.005 wt% and 0.008 wt%, respectively, compared to 0.551 wt% in the starting SH-latex and 0.587 wt% in the NH3-latex. SDS-PAGE analysis and FT-IR spectroscopy showed decomposition of latex proteins to peptides of smaller molecular weight. Physical properties of the DPNR rubber were studied. The novel EDTA-4Na treatment is considered an effective deproteinization method with potential application on both ammonia and nonammonia preservative systems.

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9

Ramadan, Abd El-Motaleb M., Shaban Y. Shaban, Mohamed M. Ibrahim, Adel A. H. Abdel-Rahman, Shehab A. Sallam, Sami A. Al-Harbi, and Walid Omar. "Synthesis and spectroscopic characterization of ternary copper(ii) complexes containing nitrogen and oxygen donors as functional mimics of catechol oxidase and phenoxazinone synthase." New Journal of Chemistry 44, no. 16 (2020): 6331–45. http://dx.doi.org/10.1039/c9nj06131b.

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Two ternary copper(ii) complexes 1 [(Cu₂Me₄en)₄(EDTA)] and 2 [(CuMe₄en)₂(MIDA)] containing the mixed ligand system of 1,1′,4,4′-tetramethylethylenediamine (Me₄en) (L) and N-methyliminodiacetic (MIDAH₂) (L′) or ethylenediaminetetraacetic acid (EDTAH₄) (L′) were synthesized.

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10

Marcia, Mario, Prabhpreet Singh, Frank Hauke, Michele Maggini, and Andreas Hirsch. "Novel EDTA-ligands containing an integral perylene bisimide (PBI) core as an optical reporter unit." Org. Biomol. Chem. 12, no. 36 (2014): 7045–58. http://dx.doi.org/10.1039/c4ob01007h.

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11

Ribar, Anita, Stefan E. Huber, Małgorzata A. Śmiałek, Katrin Tanzer, Michael Neustetter, Robin Schürmann, Ilko Bald, and Stephan Denifl. "Hydroperoxyl radical and formic acid formation from common DNA stabilizers upon low energy electron attachment." Physical Chemistry Chemical Physics 20, no. 8 (2018): 5578–85. http://dx.doi.org/10.1039/c7cp07697e.

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12

Charernsriwilaiwat, Natthan, Praneet Opanasopit, Theerasak Rojanarata, and Tanasait Ngawhirunpat. "Fabrication and Characterization of Chitosan-Ethylenediaminetetraacetic Acid/Polyvinyl Alcohol Blend Electrospun Nanofibers." Advanced Materials Research 194-196 (February 2011): 648–51. http://dx.doi.org/10.4028/www.scientific.net/amr.194-196.648.

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Electrospinning is a technique use to fabricate ultrafine fibers with diameters in the nanometer range. The electrospun fiber mats have high potentials for many applications, due to their high surface area to volume, high porosity and small pore size. In this study, chitosan-ethylenediaminetetraacetic acid (CS-EDTA)/polyvinyl alcohol (PVA) blend nanofibers were successfully prepared using electrospinning techniques without organic solvent. CS was dissolved in EDTA aqueous solution and then blended with PVA solution at various weight ratios. Physicochemical properties of CS-EDTA/PVA solution such as viscosity, conductivity and surface tension were investigated. The morphology and diameter of the electrospun fiber mats were analyzed by using scanning electron microscopy (SEM). The composite structure was characterized by differential scanning calorimetry (DSC) and fourier transform infrared spectroscopy (FT-IR). SEM images showed that the morphology and diameter of the nanofibers were mainly affected by the weight ratio of the blend. Nanofibers were obtained when the CS-EDTA content was less than 50%wt. The average diameter of the nanofibers was 119-223 nm, and this average diameter decreased with increasing CS-EDTA content. In summary, these CS electrospun nanofiber mats may be proper for the drug delivery or wound dressing application.

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13

Furlong, DN, D. Wells, and WHF Sasse. "Photooxidation at Platinum Colloidal TiO2 Aqueous-Solution Interfaces. I. Ethylenediaminetetraacetic Acid and Related-Compounds." Australian Journal of Chemistry 39, no. 5 (1986): 757. http://dx.doi.org/10.1071/ch9860757.

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The photooxidation of ethylenediaminetetraacetic acid ( edta ) and related glycine derivatives, at Pt/TiO2/aqueous solution interfaces, has been monitored via the production of hydrogen and carbon dioxide. Yields are consistent with the exhaustive oxidation of methoxycarbonyl groups and the rate varied with the number and distribution of such groups. A photooxidation pathway is proposed which involves the oxidation of intermediate carbonium ions. Plausible molecular intermediates, such as formic acid and formaldehyde in the case of edta , have been shown in separate experiments to be photooxidized according to the proposed pathway. The maximum rate of oxidation for each donor depends on its oxidation potential and its tendency to adsorb on TiO2 surfaces. Desorption due to pH increase, as well as consumption of the donor, causes the rate to decline rapidly with illumination time. Acetic and malonic acids gave some hydrogen but underwent mainly (> c. 80%) photo-Kolbe decarboxylation to yield carbon dioxide and methane. By contrast the oxidation of oxomalonic, pyruvic and lactic acids proceeded mainly via a H2 producing pathway similar to that established for edta. The oxidation of pyruvic and lactic acids ceased at a yield of one mole of CO2 per mole of acid.

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14

Narayanan, Rajeshwari, Prahada Jagannathan, and Kala Kandhasamy. "Pseudothrombocytopenia: early recognition avoids unnecessary intervention." International Journal of Contemporary Pediatrics 7, no. 10 (September 21, 2020): 2058. http://dx.doi.org/10.18203/2349-3291.ijcp20203973.

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Ethylenediaminetetraacetic acid dependent pseudothrombocytopenia (EDTA-PTCP) is the phenomenon of a spurious low platelet count due to EDTA induced aggregation of platelets. Failure to identify this can lead to unwarranted diagnostic testing, platelet transfusions and deferring emergency surgeries. An adolescent girl child was referred for acute febrile illness with thrombocytopenia. Peripheral smear examination of EDTA sample revealed platelet clumping. WBC and platelet histograms also supported the same. Repeat platelet counts in sodium citrate and heparin confirmed EDTA-PTCP.

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15

Nur’amin, Hendra Wana, Muhammad Darwin Prenggono, and Wivina Riza Devi. "Ethylenediaminetetraacetic Acid‑Dependent Pseudothrombocytopenia in Patient Previously Treated as Dengue Fever." Berkala Kedokteran 17, no. 1 (March 2, 2021): 65. http://dx.doi.org/10.20527/jbk.v17i1.10250.

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Abstract: One of the most widely used anticoagulants for a complete blood count is ethylenediaminetetraacetic acid (EDTA). Pseudothrombocytopenia (PTCP) may be caused by EDTA, this condition may lead to inappropriate diagnosis and treatment. We report a 25-year-old female with unspecific headache and joint pain with very low platelet count since 1 month before hospital admission. She was diagnosed with Dengue fever infection and got some platelet transfusion from the previous secondary hospital. She was carried out for a blood test with another anticoagulant (sodium citrate) and bone marrow aspiration. The results showed that she had normal platelet count and bone marrow cellularity. When a patient was identified with thrombocytopenia without any bleeding manifestation, hematology disease, and family history, PTCP should be taken into consideration to prevent unnecessary intervention. Keywords: platelet, pseudothrombocytopenia, ethylenediaminetetraacetic acid, Dengue fever

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16

Żmigrodzka, M., A. Winnicka, and M. Guzera. "Comparison of the influence of EDTA-K3 and sodium citrate on haematology analysis in healthy dogs." Polish Journal of Veterinary Sciences 15, no. 2 (June 1, 2012): 391–92. http://dx.doi.org/10.2478/v10181-012-0059-6.

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Comparison of the influence of EDTA-K3 and sodium citrate on haematology analysis in healthy dogs The study was carried out on 30 clinically healthy dogs of various breeds. Haemoglobin concentration, haematocrit, platelet count and platelet haematocrit were significantly lower in citrate blood than in tripotassium ethylenediaminetetraacetic acid (EDTA-K3) blood. The study confirmed the limited usage of sodium citrate in haematology analysis, unless canine EDTA-dependent thrombocytopenia is suspected.

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17

Lazar, Maria Marinela, Ionel Adrian Dinu, and Maria Valentina Dinu. "Synthesis of Ethylenediaminetetraacetic Acid-Functionalized Chitosan Cryogels as Potential Sorbents of Heavy Metal Ions." Materiale Plastice 58, no. 2 (July 5, 2021): 155–66. http://dx.doi.org/10.37358/mp.21.2.5487.

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An original functionalization strategy is proposed here to design chitosan (CS)-based cryogels with ethylenediaminetetraacetic acid (EDTA) moieties. Cryogels with aligned micro-sized tubular structures were further engineered through an unidirectional freezing approach. Attachment of EDTA groups onto CS chains was proved by 1H-RMN and FT-IR spectroscopy. The formation of EDTA-functionalized 3D porous CS-based cryogels was demonstrated by several methods of characterization (FTIR spectroscopy, optical microscopy, SEM, porosity measurements, swelling behavior, copper (II) retention capacity). The sorption tests pointed out the high potential of EDTA-functionalized CS-based cryogels for heavy metal ions retention.

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18

Liu, Xin, Jin Hong Fan, and Lu Ming Ma. "Elimination of EDTA in Aqueous Solution by Bimetallic Al-Fe Process." Advanced Materials Research 726-731 (August 2013): 2398–402. http://dx.doi.org/10.4028/www.scientific.net/amr.726-731.2398.

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Oxidative degradation of ethylenediaminetetraacetic acid(EDTA) in aqueous solution at normal temperature and pressure by the novel bimetallic Al-Fe was investigated. The results showed that the removal efficiency of EDTA, TOC and TN could be about 98%, 75% and 47% respectively after 3h reaction. The effects of initial pH, concentration of EDTA, mass ratio of Al0and Fe0and Al-Fe loading were also investigated. Significantly, the bimetallic Al-Fe process exhibited higher reactivity than monometallic Fe0/Al0process for the degradation of EDTA.

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19

Sazali, R. A., N. I. Awang Kechik, E. Yahya, and M. S. Mat-Shayuti. "Study of Barium Sulfate Scale Dissolution into Ethylenediaminetetraacetic acid (EDTA)." IOP Conference Series: Materials Science and Engineering 778 (May 1, 2020): 012112. http://dx.doi.org/10.1088/1757-899x/778/1/012112.

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20

KODAMA, Takahito, Hirokazu IMAI, Yasushi NAKAMOTO, Tamotsu SUGAWARA, and Akira B. MIURA. "48, XXYY Syndrome Associated with Ethylenediaminetetraacetic Acid(EDTA)-dependent Pseudothrombocytopenia." Internal Medicine 31, no. 1 (1992): 143–46. http://dx.doi.org/10.2169/internalmedicine.31.143.

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21

Ross, Elizabeth H., and Amy Dickinson. "Dilutional Effect of Ethylenediaminetetraacetic Acid on Packed Cell Volume in Healthy Dogs." Journal of the American Animal Hospital Association 57, no. 5 (August 8, 2021): 199–204. http://dx.doi.org/10.5326/jaaha-ms-7060.

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ABSTRACT Packed cell volume (PCV) is commonly used to assess and monitor red blood cell count in animals, but the results can be altered if inappropriate ratios of anticoagulant/blood are used. The purpose of this study was to determine the effect of ideally filled, overfilled, and underfilled K3 ethylenediaminetetraacetic acid (EDTA) tubes with various volumes of healthy dog blood on centrifuged PCV. Six milliliters of blood was obtained from 94 blood donors each. Initial distribution was injected into two nonheparinized microhematocrit tubes. The remainder was instilled into 1.3 mL K3 EDTA spray-dried tubes as 1.5 mL, 1.3 mL, 0.75 mL, 0.5 mL, and 0.25 mL aliquots. Normality was determined using the D’agostino–Pearson method and by visual examination of histograms. Data were analyzed using a repeated-measures analysis of variance with post hoc testing using Tukey’s test. There is a statistically significant decrease in the PCV between all groups with progressive underfilling of tubes (P < .0001). The closest difference is between 1.5 and 1.3 mL (P = .0138). Our study suggested that underfilling K3 EDTA tubes significantly and negatively influences the PCV in healthy dogs. Using underfilled K3 EDTA tubes result in a lower PCV compared with directly filled microhematocrit tubes without anticoagulant.

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22

Zhang, Yongfang, Limin Wang, Deqing Chu, Hongming Sun, Aoxuan Wang, Zhongchao Ma, Lufeng Yang, Yan Zhuang, and Yuze Bai. "Fabrication of coupled twin-shaped hollow hemispherical calcium molybdate via a facile ultrasound-assisted approach." CrystEngComm 17, no. 12 (2015): 2444–49. http://dx.doi.org/10.1039/c4ce02124j.

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Coupled twin-shaped hollow hemispherical calcium molybdate (CTHH-CaMoO₄) microstructures were successfully synthesized via a facile ultrasound-assisted template-free route in the presence of absolute ethanol and ethylenediaminetetraacetic acid (EDTA).

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23

Almustapha, Sakinatu. "Modification of Glassy Carbon Electrode Using Microcrystalline Cellulose-Ethylenediaminetetraacetic Acid for the Detection of Lead and Cadmium Ions." UMYU Scientifica 1, no. 1 (September 30, 2022): 221–26. http://dx.doi.org/10.56919/usci.1122.028.

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There is a greater need for the identification and monitoring of metal contaminants as a result of the growing hazard that heavy metal contamination of water poses to the environment. In this work, microcrystalline cellulose was functionalised with ethylenediaminetetraacetic acid, and the product analysed using scanning electron microscopy and X-ray diffraction techniques. The functionalised microcrystalline cellulose-ethylenediaminetetraacetic acid was employed to modify the glassy carbon electrode. Detection for Pb2+ and Cd2+ ions was determined using square wave anodic stripping voltammetric analysis at square wave potential scan of -1.0 V to -0.2 V, and deposition potential of -1.0 V in 0.1M acetate buffer for 240 sec. Higher current response of Pb2+ was obtained at -0.6 V and that of Cd2+ at -0.8V. Limit of detection for Pb2+ was 1.8 ppb (MCC-EDTA GCE) and 5.0 ppb (MCC-GCE) , while that of Cd2+ was 7 ppb (MCC-EDTA GCE) and 10 ppb (MCC-GCE), these indicate MCC EDTA GCE has higher sensitivity towards detection of the metal ions and selectivity of modifiers for detection of Pd2+ and Cd2+ was achieved successfully.

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24

Shi, Liubin, Mingde Tang, Yaseen Muhammad, Yong Tang, Lulu He, Weichao Wang, Zhangfa Tong, and Lishuo Li. "Controlled preparation of micro–nano hierarchical hollow calcium carbonate microspheres by pressurized-CO2 carbonization and their CaCO3:Eu3+ photoluminescence properties." CrystEngComm 23, no. 16 (2021): 3033–42. http://dx.doi.org/10.1039/d0ce01854f.

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Herein, calcium carbonate hollow microspheres with a micro–nano hierarchical structure were successfully synthesized using disodium salt of ethylenediaminetetraacetic acid (EDTA-2Na) as an additive, by bubbling pressurized carbon dioxide and calcium hydroxide at 120 °C.

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Zhu, Yaqiong, Yonghong Ni, and Enhong Sheng. "Fluorescent LaVO4:Eu3+ micro/nanocrystals: pH-tuned shape and phase evolution and investigation of the mechanism of detection of Fe3+ ions." Dalton Transactions 45, no. 21 (2016): 8994–9000. http://dx.doi.org/10.1039/c6dt01402j.

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LaVO₄:Eu³⁺ micro/nanocrystals with various shapes were hydrothermally synthesized by adjusting the pH of the system at 180 °C for 12 h in the presence of ethylenediaminetetraacetic acid (EDTA).

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Liu, Xin, Jin Hong Fan, and Lu Ming Ma. "Destruction of EDTA by Bimetallic Al-Fe/O₂ Process under Aqueous Room Temperature and Pressure Conditions." Advanced Materials Research 800 (September 2013): 555–59. http://dx.doi.org/10.4028/www.scientific.net/amr.800.555.

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Oxidative degradation of ethylenediaminetetraacetic acid (EDTA) in aqueous solution at room temperature and pressure by the bimetallic Al-Fe/O2 process, which was verified by the addition of benzoic acid as ·OH scavenger and the detection of para-hydroxybenzoic acid, was investigated. The results showed that the removal efficiency of EDTA, TOC and TN could be about 98%, 77.5% and 43% respectively after 3h reaction when the initial pH was 5. The effects of initial pH, concentration of EDTA, mass ratio of Al0 and Fe0 and Al-Fe loading were also investigated. Significantly, the bimetallic Al-Fe process exhibited higher reactivity than monometallic Fe0/Al0 process for the degradation of EDTA when the mass ratio of Al0 and Fe0 ranged from 0.11 to 2.97.

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27

Sokolova, N. A., M. I. Savina, and O. S. Shokhina. "EDTA‑dependent pseudothrombocytopenia in child (clinical case report)." Medical alphabet, no. 13 (June 29, 2021): 51–54. http://dx.doi.org/10.33667/2078-5631-2021-13-51-54.

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Ethylenediaminetetraacetic acid (EDTA)-dependent pseudothrombocytopenia is the phenomenon of a spurious low platelet count due to antiplatelet antibodies that cause platelet clumping in blood anticoagulated with EDTA. The aggregation of platelets in EDTA-dependent pseudothrombocytopenia is usually prevented by other anticoagulants, such as sodium citrate. EDTA-dependent pseudothrombocytopenia has never been associated with hemorrhagic diathesis or platelet dysfunction. In this article, a 2,5-year-old boy with EDTA-dependent pseudothrombocytopenia is presented because of rare presentation. We report that EDTA can induce platelet clumping, and thus spuriously low platelet counts. However, aggregation of platelets was not detected in blood samples with sodium citrate, and platelet count was normal.

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28

Yildiz, A., and A. Gür. "Adsorption of phenol and chlorophenols on pure and modified sepiolite." Journal of the Serbian Chemical Society 72, no. 5 (2007): 467–74. http://dx.doi.org/10.2298/jsc0705467y.

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In this work, pure sepiolite and sepiolite modified by nitric acid (HNO3), ethylenediaminetetraacetic acid (EDTA) and hexadecyltrimethylammonium (HDTMA) were used ad adsorbents. The changes on the surface were studied by IR spectroscopy. The adsorption of solutions of phenol and phenol derivatives in pure ethanol on these adsorbents were examined by means of gas chromatography. It was found that the adsorption capacities of the clay-organic complexes (sepiolite-EDTA and sepiolite- HDTMA) were higher than those of pure sepiolite and sepiolite-HNO3.

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29

Yang, Jian Hui, and Dhiraj K. Sardar. "One-Pot Synthesis of Coral-Shaped Gold Nanostructures for Surface-Enhanced Raman Scattering." Journal of Nano Research 14 (April 2011): 47–55. http://dx.doi.org/10.4028/www.scientific.net/jnanor.14.47.

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In this work, a chelating agent, ethylenediaminetetraacetic acid (EDTA) was used for the controllable synthesis of gold nanostructures in aqueous solution. Coral-shaped Au nanostructures were synthesized by reducing HAuCl4 with EDTA. EDTA serves not only as a reducing agent but also as a particle capping agent in the formation of coral-shaped Au nanostructures. It is found that the molar ratio of HAuCl4:EDTA and reacted temperature play significant effects on the formation and growth of these novel nanostructures. These Au nanostructures could serve as highly sensitive and reproductive surface-enhanced Raman scattering (SERS) substrates for chemical and biological detection.

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30

Deng, Yu-Ying, Xin-Feng Xiao, Dan Wang, Bo Han, Yu Gao, and Jian-Liang Xue. "Adsorption of Cr(VI) from Aqueous Solution by Ethylenediaminetetraacetic Acid-Chitosan-Modified Metal-Organic Framework." Journal of Nanoscience and Nanotechnology 20, no. 3 (March 1, 2020): 1660–69. http://dx.doi.org/10.1166/jnn.2020.17157.

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Cu-BTC was synthesised by hydrothermal method in this study to adsorb and remove the toxic heavy metal hexavalent chromium Cr(VI) in water. The EDTA-chitosan/Cu-BTC was prepared by the surface modification of Cu-BTC with EDTA-modified chitosan. The initial concentration effects of adsorbed chromium solution, adsorbent dosage, adsorption time, adsorption temperature and pH of chromium solution on adsorption capacity were estimated using the single-factor optimisation experiment. Results show that the adsorption capacity of the modified composite was higher than that of Cu-BTC. Cu-BTC and EDTA-chitosan/Cu-BTC exhibited significant adsorption of Cr(VI) under acidic conditions in water and basically independent of temperature. Their adsorption processes conformed with the pseudo-second-order model. The Langmuir adsorption isotherm model obtained the adsorption isotherm, which indicated that the adsorption process was single molecule adsorption. Isotherm fitting obtained the maximum adsorption amounts of Cr(VI) for Cu-BTC and EDTA-chitosan/Cu-BTC at 27.32 and 46.51 mg·g-1, respectively. Factor and principal component analyses show that the main factors affecting the adsorption of Cr(VI) in the EDTA-chitosan/Cu-BTC composites are pH, initial concentration and adsorption time. Therefore, EDTA-chitosan-modified Cu-BTC was a more feasible metal-organic framework material than Cu-BTC because of better adsorption performance, which can be used for adsorption removal of Cr(VI) in water.

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Zhang, Chao, Shuai Wang, Zhan-fang Cao, and Hong Zhong. "Recovery of manganese from manganese oxide ores in the EDTA solution." Metallurgical Research & Technology 115, no. 3 (2018): 306. http://dx.doi.org/10.1051/metal/2018004.

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A new process has been experimentally and theoretically established for the recovery of manganese from manganese oxide ores, mainly including the reductive leaching of manganese by ethylenediaminetetraacetic acid (EDTA), EDTA recovery, and manganese electrolysis. The experimental conditions for this process were investigated. Moderate leaching environment by EDTA with the pH in the range of 5–6 is of benefit to leach manganese from some manganese oxide ores with high-content impurities, such as iron and aluminum. Most of EDTA can be recovered by acidification. A small amount of the residual EDTA in the electrolyte can prevent the generation of anode mud. In addition, trimanganese tetroxide (Mn3O4) can be obtained by the roasting of the EDTA–Mn crystallized product.

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32

Narotzky, Emma, Maria E. Jerome, John R. Horner, and Dana J. Rashid. "An Ion-exchange Bone Demineralization Method for Improved Time, Expense, and Tissue Preservation." Journal of Histochemistry & Cytochemistry 68, no. 9 (August 14, 2020): 607–20. http://dx.doi.org/10.1369/0022155420951286.

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Here, we describe an ethylenediaminetetraacetic acid (EDTA)-based bone demineralization procedure that uses cation-exchange resin and dialysis tubing. This method does not require solution changes or special equipment, is faster than EDTA alone, is cost-effective, and is environmentally friendly. Like other EDTA-based methods, this procedure yields superior tissue preservation than formic acid demineralization. Greater protein antigenicity using EDTA as opposed to formic acid has been described, but we also find significant improvements in carbohydrate-based histological staining. Histological staining using this method reveals cartilage layers that are not distinguishable with formic acid demineralization. Carbohydrate preservation is relevant to many applications of bone demineralization, including the assessment of osteoarthritis from bone biopsies and the use of demineralized bone powder for tissue culture and surgical implants. The improvements in time, expense, and tissue quality indicate this method is a practical and often superior alternative to formic acid demineralization:

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33

Zhong, Tingting, Yali Liu, and Xiaorong Kang. "Synthetic Effect of EDTA and Ni2+ on Methane Production and Microbial Communities in Anaerobic Digestion Process of Kitchen Wastes." Processes 7, no. 9 (September 3, 2019): 590. http://dx.doi.org/10.3390/pr7090590.

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Batch tests were carried out to study the effect of simultaneous addition of ethylenediaminetetraacetic acid and Ni2+ (EDTA-Ni) on anaerobic digestion (AD) performances of kitchen wastes (KWs). The results indicated that the cumulative biogas yield and methane content were enhanced to 563.82 mL/gVS and 63.7% by adding EDTA-Ni, respectively, which were almost 1.15 and 1.07-fold of that in the R2 with Ni2+ addition alone. At the same time, an obvious decrease of propionic acid was observed after EDTA-Ni addition. The speciation analysis of Ni showed that the percentages of water-soluble and exchangeable Ni were increased to 38.8% and 36.3% due to EDTA-Ni addition, respectively. Also, the high-throughput sequencing analysis revealed that the EDTA-Ni promoted the growth and metabolism of Methanosarcina and Methanobacterium, which might be the major reason for propionic acid degradation and methane production.

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34

MENG, Liangyu, Wenqian CAI, Hongyan QU, Jingfeng LIU, Jianxing LAN, Jiakun LU, Taofang LAN, and Jianrong LI. "Inhibition of Ethylenediaminetetraacetic acid (EDTA) on Biofilm Formation of Staphylococcus aureus." Food Science and Technology Research 19, no. 2 (2013): 323–30. http://dx.doi.org/10.3136/fstr.19.323.

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35

Deai, Masahito, Rin Oya, Naosi Saso, Asahi Tanaka, Izumi Uchida, Yuta Miyake, Ryo Tachihara, et al. "Ethylenediaminetetraacetic acid (EDTA) enhances cAMP production in human TDAG8-expressing cells." Biochemical and Biophysical Research Communications 626 (October 2022): 15–20. http://dx.doi.org/10.1016/j.bbrc.2022.07.110.

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36

Chitra, S., K. Paramasivan, and P. K. Sinha. "Sono-Photo Fenton Treatment of Liquid Waste Containing Ethylenediaminetetraacetic Acid (EDTA)." International Journal of Nonferrous Metallurgy 02, no. 02 (2013): 89–94. http://dx.doi.org/10.4236/ijnm.2013.22012.

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37

Feng, D., and J. S. J. van Deventer. "Thiosulphate leaching of gold in the presence of ethylenediaminetetraacetic acid (EDTA)." Minerals Engineering 23, no. 2 (January 2010): 143–50. http://dx.doi.org/10.1016/j.mineng.2009.11.009.

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38

KIDA, Nori, Sosuke SUZUKI, Takaaki YAMANAKA, Kazuo FURUYAMA, and Fumiaki TAGUCHI. "Effect of pH on preferential Antibacterial-activity of Ethylenediaminetetraacetic acid (EDTA)." Nippon Saikingaku Zasshi 47, no. 4 (1992): 625–29. http://dx.doi.org/10.3412/jsb.47.625.

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39

Bezzubov, S. I., V. D. Dolzhenko, and Yu M. Kiselev. "Equilibria in solutions of rhodium(III) complex with ethylenediaminetetraacetic acid (EDTA)." Journal of Analytical Chemistry 67, no. 2 (February 2012): 140–43. http://dx.doi.org/10.1134/s1061934811120021.

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40

Korhonen, M. Susanna, Sirpa E. Metsärinne, and Tuula A. Tuhkanen. "Removal of Ethylenediaminetetraacetic acid (EDTA) from Pulp Mill Effluents by Ozonation." Ozone: Science & Engineering 22, no. 3 (January 2000): 279–86. http://dx.doi.org/10.1080/01919510008547211.

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41

Hilmy, A. M., N. El-Domaity, and A. Y. Daabees. "Effect of ethylenediaminetetraacetic acid (EDTA) on acute mercury poisoning of toad." Comparative Biochemistry and Physiology Part C: Comparative Pharmacology 85, no. 1 (January 1986): 253–54. http://dx.doi.org/10.1016/0742-8413(86)90083-6.

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42

Alcántara-Obispo, Esther, Flor Santander-Rengifo, Marysela Ladera-Castañeda, Carlos López-Gurreonero, Antonieta Castro Pérez-Vargas, Alberto Cornejo-Pinto, Luis Cervantes-Ganoza, and César Cayo-Rojas. "Adhesive Strength in Dentin Conditioned with 18% Ethylenediaminetetraacetic Acid versus 35% Phosphoric Acid: In Vitro Study with 1-Year Artificial Aging." Polymers 14, no. 20 (October 12, 2022): 4291. http://dx.doi.org/10.3390/polym14204291.

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The success and longevity of a resin composite restoration is determined by its good bonding to the tooth structure, with the adhesion being a challenge to dentin due to its complexity and structural heterogeneity. The present study aimed to compare the adhesive strength of dentin conditioned with 18% ethylenediaminetetraacetic acid (EDTA) versus 35% phosphoric acid (H3PO4) in human premolars. Materials and Methods: This in vitro experimental study was performed on 40 human premolars. The occlusal thirds were sectioned and randomly placed into four groups according to the type of dentin conditioning: Group 1 (control), Group 2 (18% EDTA), Group 3 (35% H3PO4) and Group 4 (18% EDTA plus 35% H3PO4). Then, 10,000 thermocycles between 5 +/− 2 °C and 55 +/− 2 °C were applied. Adhesive strength was tested by shearing with a digital universal testing machine at a crosshead speed of 0.75 mm/min. The values obtained were analyzed in megapascals (MPa). The mean and standard deviation were used as measures of central tendency and dispersion. In addition, a one-factor intergroup ANOVA test was applied with Tukey’s post hoc test considering a significance level of p < 0.05. Results: The 18% EDTA and 18% EDTA plus 35% H3PO4 showed significantly higher adhesive strength compared to the control group that did not receive dentin conditioning (p = 0.047 and p < 0.001, respectively). However, the group conditioned with 18% EDTA did not present significant differences compared to the group conditioned with 35% H3PO4 (p = 0.997). In addition, the group conditioned with 18% EDTA plus 35% H3PO4 showed significantly higher adhesive strength compared to the groups conditioned with 18% EDTA (p = 0.002) and 35% H3PO4 (p = 0.001). Conclusion: The adhesion of bulk fill resin composite to dentin was favorable when preconditioning was performed using 18% EDTA followed by 35% H3PO4. In contrast, when both etchants were used separately, the bulk fill resin composite showed similar bond strength values in both cases, but significantly lower compared to their sequential application.

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43

Chen, Shiao-Shing, Hong-Der Hsu, Yi-Jiun Lin, and Pei-Ying Chin. "Removal of EDTA from low pH printed-circuit board wastewater in a fluidized zero valent iron reactor." Water Science and Technology 58, no. 3 (August 1, 2008): 661–67. http://dx.doi.org/10.2166/wst.2008.695.

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Fluidized zero valent iron (ZVI) process was adopted to reduce ethylenediaminetetraacetic acid (EDTA) from low pH printed-circuit board (PCB) wastewater for two reasons: (1) low pH of the wastewater favoring the ZVI reaction; (2) higher ZVI utilization for fluidized process due to abrasive motion of the ZVI. The results showed that the degradation of EDTA was greatly enhanced under acidic pH, longer hydraulic detention time (HRT) and presence of dissolved oxygen (DO). Without addition of oxygen, 65% of EDTA was removed with capacity of 7.33 mg EDTA/g ZVI at pH 2, ZVI dosage of 424 g/L and HRT 10 min. With 6.8 mg/L of DO, 83% of EDTA was reduced with capacity of 19.01 mg EDTA/g ZVI for the same experimental condition. The presence of oxygen/ZVI initiated a Fenton type reaction to reduce EDTA. The end product after EDTA degradation was analyzed by high performance liquid chromoagraphy (HPLC), where propionic acid (C2H5COOH) was observed, indicating EDTA (oxidation number for carbon is 2) was oxidized to propionic acid (oxidation number for carbon is 3). Nitrogen species was also measured and the nitrogen in EDTA was converted to ammonium instead of nitrate and nitrite.

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44

Meehan, J. T., R. C. Cutlip, and H. D. Lehmkuhl. "Evaluation of Ethylenediaminetetraacetic Acid, Tetrasodium Salt Dihydrate (EDTA)-Tween 20 Treatment versus Protease Digestion of Formalin-fixed Tissue Sections for Detection of Bovine Respiratory Syncytial Virus Antigen in Infected Ovine Lung." Veterinary Pathology 26, no. 4 (July 1989): 322–25. http://dx.doi.org/10.1177/030098588902600406.

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The efficacy of protease and ethylenediaminetetraacetic acid, tetrasodium salt dihydrate (EDTA)-Tween 20 in unmasking bovine respiratory syncytial virus (BRSV) antigens in formalin-fixed lung tissue was compared using avidin-biotin immunoperoxidase procedure. Tissues were taken from experimentally infected lambs. BRSV antigen stained in both techniques. Treatment with EDTA-Tween 20 resulted in more intense staining of BRSV infected cells, more uniform cytoplasmic staining, less non-specific background, and superior cellular detail in comparison to protease digestion.

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45

Kim, Jongho, Chan Park, Kune-Woo Lee, and Taek Lee. "Adsorption of Ethylenediaminetetraacetic Acid on a Gel-Type Ion-Exchange Resin for Purification of Liquid Waste Containing Cs Ions." Polymers 11, no. 2 (February 11, 2019): 297. http://dx.doi.org/10.3390/polym11020297.

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Because of its excellent chelating property, ethylenediaminetetraacetic acid (EDTA) is used as a complex agent, not only for heavy metals, but also for radioactive isotopes during the decontamination of nuclear facilities. The removal of EDTA was investigated by adsorption with commercially available, gel-type, anion-exchange resins (AERs), which are based on cross-linked polystyrene with positive tertiary amine groups. Because of the positive charge on AERs, they could adsorb EDTA effectively even in a solution mixed with ions of cesium (Cs) via electrostatic attraction. Because EDTA adsorption by cation-exchange resins (CERs) was not possible, it was concluded that the negative charges on CERs do not contribute to the interaction with EDTA. The maximum adsorption capacity (qmax) of AER (2 g/L) for EDTA removal, calculated by the Langmuir isotherm model was 0.47 mmol/g for initial EDTA concentrations in the range of 0.01–1 mM in the EDTA/Cs mixed solution. The Langmuir isotherm model was found to be suitable for EDTA adsorption on AERs, indicative of monolayer adsorption. The results clearly suggested that the AERs could efficiently remove EDTA, regardless of the presence of nuclides, such as Cs ions in the aqueous solution.

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46

Liu, Xin, Jin Hong Fan, and Lu Ming Ma. "Elimination of EDTA in Aqueous Solution by Bimetallic Fe-Cu Process." Advanced Materials Research 779-780 (September 2013): 21–25. http://dx.doi.org/10.4028/www.scientific.net/amr.779-780.21.

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Oxidative degradation of ethylenediaminetetraacetic acid in aqueous solution at normal temperature and pressure by the bimetallic Fe-Cu, which was verified by ESR spectroscopy, was investigated. The results showed that the removal efficiency of EDTA, TOC and TN could be about 99%, 60% and 39% respectively after 3h reaction. The degradation products were iminodiacetate, formate and acetate. The effects of initial pH, concentration of EDTA, Cu content and Fe-Cu loading were also investigated. Significantly, the bimetallic Fe-Cu process exhibited higher reactivity than monometallic Fe0process for the degradation of EDTA and it would not cause new heavy metal pollution in effluent.

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47

Ferrero, Maria Elena. "Rationale for the Successful Management of EDTA Chelation Therapy in Human Burden by Toxic Metals." BioMed Research International 2016 (2016): 1–13. http://dx.doi.org/10.1155/2016/8274504.

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Exposure to environmental and occupational toxicants is responsible for adverse effects on human health. Chelation therapy is the only procedure able to remove toxic metals from human organs and tissue, aiming to treat damage related to acute and/or chronic intoxication. The present review focuses on the most recent evidence of the successful use of the chelating agent ethylenediaminetetraacetic acid (EDTA). Assessment of toxic-metal presence in humans, as well as the rationale of EDTA therapy in cardiovascular and neurodegenerative diseases, is reported.

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48

Messele, Selamawit Ashagre, Christophe Bengoa, Frank Erich Stüber, Jaume Giralt, Agustí Fortuny, Azael Fabregat, and Josep Font. "Enhanced Degradation of Phenol by a Fenton-Like System (Fe/EDTA/H2O2) at Circumneutral pH." Catalysts 9, no. 5 (May 22, 2019): 474. http://dx.doi.org/10.3390/catal9050474.

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This work deals with the degradation of phenol based on the classical Fenton process, which is enhanced by the presence of chelating agents. Several iron-chelating agents such as ethylenediaminetetraacetic acid (EDTA), nitrilotriacetic acid (NTA), diethylenetriamine pentaacetic acid (DTPA), and ethylenediamine-N,N’-diacetic acid (EDDA) were explored, although particular attention was given to EDTA. The effect of the molar ligand to iron ratio, EDTA:Fe, initial pH, and temperature on the oxidation process was studied. The results demonstrate that the proposed alternative approach allows the capacity for degrading phenol to be extended from the usual acidic pH (around 3.0) to circumneutral pH range (6.5–7.5). The overall feasibility of the process depends on the concentration of the chelating agent and the initial pH of the solution. The maximum phenol conversion, over 95%, is achieved using a 0.3 to 1 molar ratio of EDTA:Fe, stoichiometric ratio of H2O2 at an initial pH of 7.0, and a temperature of 30 °C after 2 hours of reaction, whereas only 10% of phenol conversion is obtained without EDTA. However, in excess of ligand (EDTA:Fe > 1), the generation of radicals seems to be strongly suppressed. Improvement of the phenol removal efficiency at neutral pH also occurs for the other chelating agents tested.

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49

Babey, P. A., C. A. Emilio, R. E. Ferreyra, E. A. Gautier, R. T. Gettar, and M. I. Litter. "Kinetics and mechanisms of EDTA photocatalytic degradation with TiO2." Water Science and Technology 44, no. 5 (September 1, 2001): 179–85. http://dx.doi.org/10.2166/wst.2001.0281.

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A complete study on the photocatalytic degradation of ethylenediaminetetraacetic acid (EDTA) over TiO2 has been initiated, to establish the influence of several parameters on the reaction rate, the nature of the intermediates and the kinetic regime. TiO2 (Degussa P25) suspensions containing EDTA at pH 3 at different concentrations were irradiated under near UV light. A Langmuirian behavior was observed, from which kinetic constants have been obtained. Experiments with 5.0 mM EDTA (zero order kinetic regime) were performed for 3 hours irradiation under different conditions. Under N2 bubbling, depletion of EDTA was very low. Under O2 bubbling, the concentration of EDTA decreased around 90%. However, the corresponding decrease of TOC ranged only between 4.5% and 9%. A higher TOC reduction (22% or more) was obtained by keeping the pH constant by HClO4 addition, or by hydrogen peroxide addition. Addition of 0.5 mM Fe(III) caused a dramatic increase on the initial rate of EDTA depletion and approximately a 32% TOC decrease. Analysis of the filtered solution was performed by ion chromatography and capillary electrophoresis to monitor the disappearance of EDTA and the formation of degradation products after different irradiation times. So far, glycine, ethylenediamine, formic acid, ammonium, iminodiacetic acid, oxalic acid and glyoxylic acid have been identified.

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50

Charernsriwilaiwat, Natthan, Theerasak Rojanarata, Tanasait Ngawhirunpat, and Praneet Opanasopit. "In Vitro Antioxidant Activity of Electrospun Chitosan Aqueous Salts Based Nanofiber Mats." Advanced Materials Research 1060 (December 2014): 111–14. http://dx.doi.org/10.4028/www.scientific.net/amr.1060.111.

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The aim of this study was to investigate the antioxidant activities of chitosan acetate (CS-acetate), chitosan hydroxybenzotriazole (CS-HOBt), chitosan thiamine pyrophosphate (CS-TPP) and chitosan ethylenediaminetetraacetic acid (CS-EDTA) nanofiber mats. Chitosan was dissolved with hydroxybenzotriazole (HOBt), thiamine pyrophosphate (TPP) and ethylenediaminetetraacetic acid (EDTA) in distilled water. These chitosan aqueous salts were blended with polyvinyl alcohol (PVA) at volume ratio 30/70 chitosan salts/PVA and prepared to nanofibers via electrospinning process. The morphology of electrospun chitosan aqueous salts based nanofiber mats were observed under scanning electron microscope (SEM). The antioxidant activities were determined employing various established in vitro system such as superoxide, hydroxyl radicals scavenging and metal ion chelating compared with pure PVA nanofiber mats. The results exhibited that the electrospun chitosan aqueous salts based nanofiber mats showed the different antioxidant activity depended on salt forms. Among the salt forms, CS-acetate nanofiber mats showed the highest superoxide radical scavenging effect while CS-HOBt nanofiber mats (IC50 = 7.53 mg/mL) showed the highest hydroxyl radical scavenging effect. For the metal ion chelating activity, CS-EDTA nanofiber mats showed the highest chelating activity (IC50 = 1.07 mg/mL). In summary, the antioxidant chitosan aqueous salt based nanofiber mats have potential for use in pharmaceutical applications.

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