نتایج جستجو برای: chelates

تعداد نتایج: 1937  

Journal: :European journal of radiology 2008
S K Morcos

Extracellular gadolinium contrast agents (Gd-CA) are either linear or macrocyclic chelates available as ionic or non-ionic preparations. The molecular structure whether cyclic or linear and ionicity determines the stability of Gd-CA. Linear chelates are flexible open chains which do not offer a strong binding to Gd(3+). In contrast, the macrocyclic chelates offer a strong binding to Gd(3+) by t...

ژورنال: علوم آب و خاک 2011
زهرا عربی, , محمد ‌اسماعیل اسدی, , مهدی همایی, ,

In this study, the effects of enhancing synthetic chelators (HEDTA, EGTA) and low molecular weight organic acids (LMWOA) such as citric acid were compared on cadmium (Cd) solution in soils that were artificially contaminated. Also Cd phytoextraction capability by radish (Raphanus Sativus L.) was studied. The experiment was laid out in a randomized complete factorial design where each treatment ...

Journal: :Dalton transactions 2013
Arsénio de Sá Célia S Bonnet Carlos F G C Geraldes Éva Tóth Paula M T Ferreira João P André

Due to its favorable relaxometric properties, Mn(2+) is an appealing metal ion for magnetic resonance imaging (MRI) contrast agents. This paper reports the synthesis and characterization of three new triazadicarboxylate-type ligands and their Mn(2+) chelates (NODAHep, 1,4,7-triazacyclononane-1,4-diacetate-7-heptanil; NODABA, 1,4,7-triazacyclononane-1,4-diacetate-7-benzoic acid; and NODAHA, 1,4,...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2005
Chengjie Zhang Jun'ichiro Miura Yukio Nagaosa

A sensitive and selective method has been developed for the simultaneous determination of cadmium, zinc, nickel and cobalt. The method is based on the chelation of metal ions with 2-(8-quinolylazo)-4,5-diphenylimidazole (QAI) and the subsequent reversed-phase (RP) high-performance liquid chromatographic separation and spectrophotometric detection of the metal chelates. The chelates were separat...

Journal: :The Journal of biological chemistry 1990
G Mithieux F V Vega J P Riou

We have recently shown that the Ca.EGTA and Mg.EDTA complexes, but not free Ca2+ or Mg2+, inhibit the liver glucose-6-phosphatase (Mithieux, G., Vega, F. V., Beylot, M., and Riou, J. P. (1990) J. Biol. Chem. 265, 7257-7259). In this work, we report that, when complexed with Mg2+, two endogenous dicarboxylic keto acids (alpha-ketoglutarate (alpha-KG) and oxaloacetate (OAA] inhibit the glucose-6-...

Journal: :Clinical chemistry 2007
Ye Xu Qingge Li

BACKGROUND Time-resolved immunofluorometric assays (TrIFA) using lanthanide-labeled nanoparticles have greatly increased the sensitivity of immunoassays. Current labeling strategies, however, use either physical doping of lanthanide chelates into preformed nanoparticles or covalent linking of lanthanide chelates to precursors used for making nanoparticles; both these strategies have drawbacks. ...

2006
H. S. Lim I. K. Paik T. I. Sohn W. Y. Kim

An experiment was conducted to investigate the effects of supplemental copper (Cu) chelates (methionine, chitosan and yeast) on the performance, nutrient digestibility, serum IgG level, gizzard erosion, Cu content in the liver and excreta and the level of total cholesterol in breast muscle and serum of broiler chickens. Two hundred and forty hatched broiler chickens (Ross 208) were assigned to ...

Journal: :Chemical communications 2009
Peter Caravan Biplab Das Qing Deng Stéphane Dumas Vincent Jacques Steffi K Koerner Andrew Kolodziej Richard J Looby Wei-Chuan Sun Zhaoda Zhang

A strategy for preparing peptide-based magnetic resonance contrast agents with multiple gadolinium chelates is described.

Journal: :Nanoscale advances 2023

Magnetic micelles with surface decorated by S-rich chelates sequester ototoxic cisplatin in aqueous solutions, and the isolation of cisplatin-saturated is steered external magnets.

2008
R. Lunt A. Wallace

U s e of chelating agents--especially the new compound Fe 1 3 8 t o correct iron chlorosis by effectively supplying iron to plants has proved promising in a series of experiments. All plant species tested-but not all individual plants-responded to treatment, and some of the individuals within species did respond with retreatment. Treatment responses in the field have lasted from two to six mont...

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