Ethylenediaminetetraacetic add

Ladder diagram for metal-ligand complexes of ethylenediaminetetraacetic add (EOTA) with Ca + and Mg +. 

Two examples of polycarbonyl and polyamino compounds are shown in Figure 5.7. Ethylenediaminetetraacetic add (EDTA) is a synthetic ligand. The other, a siderophore, is biologically derived. Other polycyclic structures that coordinate with iron are also common. 

The stabilization of a complex due to cyclization has already been noted, and it might be assumed that where one ring is good, several rings should be better. In the vast majority of cases, stability is indeed increased by incorporation of more than one ring into a structure. The Ca2+ ion, one of the ions with the least tendency toward complex formation, easily snuggles into the hexadentate anion of ethylenediaminetetraacetic add (versene, V) while the anion twists itself into a five-ringed structure (Fig. 6-2). So stable is this chelate that a 0.001 molar solution in water is but 0.01 percent dissociated. 

Ethyl diazoacetate, 228-230,325 Ethyl diethoxyacetate, 230 Ethyldiisopropylamine, 230,368 Ethyl (3,0-dimethylacrylate, 249 l-Ethyl-3-(3 -dunethylaminopropyl)carbo-diimide hydrochloride, 26 Ethyl l,3-dithiane-2-carboxylate, 230-231 Ethylene, 11 Ethylene carbonate, 41 Ethylenediamine, 231,488 Ethylenediaminetetraacetic acid, 204 Ethylenediaminetetraacetic add disodium salt, 321... 

Ethylenediaminetetraacetic add, disodium salt dihydrate Acetic acid (ethylenedinitrilo)tetra-, disodium salt, dihydrate (8) Glycine, N,N -1,2-ethanediylbis[N-(carboxymethyl)-, disodium salt, dihydrate (9) (6381-92-6)... 

Abbreviations BSA bovine serum albumin HSA, human serum albumin EDTA, ethylenediaminetetraacetic add DMSO, dimethylsulfoxide PEG, polyethylene glycol. 

Experiment Number Concentration of Milwhite Kaohnite (g/L) Initial Concentration of Cadmium (mg/1) Initial Concentration of Ethylenediaminetetraacetic Add (M)... 

Until recent years the only s5mtheses of 3-hydroxyquinoline involved multistep processes, the last step of which consisted of the conversion of 3-aminoquinoline to 3-hydroxyquinoline via the diazonium salt. " Small quantities of quinoline have been oxidized to 3-hydroxyquinoline in low yields by using oxygen in the presence of ascorbic acid, ethylenediaminetetraacetic add, ferrous sulfate, and phosphate buffer. The decarboxylation of 3-hy[Pg.91]

Heavy-metal poisoning is treated by administering chelating agents—substances that combine with the metal ions and hold them very tightly. One effective antidote is the chelating agent ethylenediaminetetraacetic add, or EDTA, which will chelate all heavy metals except mercury. 

The incorporation of paramagnetic metal (Cu ) ions, through either ethylenediaminetetraacetic add or a chelator lipid, into membrane protein samples for rapid data collection under MAS was utilised to increase sensitivity. An example of sensitivity of DsbB (20kDa), an integral membrane protein, more than doubles in the same experimental time due to H T1 relaxation enhancement. 

Iron is released from horse spleen ferritin by both 5-aminolaevulinic acid-generated 02 " and enoyl radical, which amplifies the chain of 5-aminolaevulinic acid oxidation (Rocha et al. 2000). Iron chelators such as ethylenediaminetetraacetic add (EDTA), ATP, but not dtrate, and phosphate accelerate this process and 5-aminolaevulinic acid-promoted iron release from horse spleen ferritin is faster in horse spleen isoferritins containing larger amounts of phosphate in the core. 

The organotin chelate complexes with tin-nitrogen bonds are listed in Table VI. Included are a few complexes of ethylenediaminetetraacetic add described recently. 

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