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Divalent Cation Interactions with Oligogalacturonides
Journal of Agricultural and Food Chemistry, 2001The conformational properties of high and low molecular weight galacturonides were investigated in relation to the ability of oligomers with degree of polymerization >10 to act as elicitors of plant defense mechanisms. Oligomers from polygalacturonate were obtained by means of enzymatic hydrolysis.
CESCUTTI, PAOLA, RIZZO, ROBERTO
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Interaction of divalent cations with polyuronates
Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases, 1988The interaction of some divalent cations (Ca2+, Cu2+, Pb2+, Zn2+ and Cd2+) with two polyuronates (alginate and polygalacturonate) has been studied by thermodynamic and structural methods. From the thermodynamic results, the enthalpy of interaction is claimed to reveal the changes in the conformation and/or association of polymeric chains, while the ...
CESARO, ATTILIO +2 more
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Divalent cation binding to ceruloplasmin
Biometals, 1996Binding of calcium to human and sheep ceruloplasmin was investigated by metal substitution with manganese and competitive displacement of bound manganese by calcium monitored by electron paramagnetic resonance spectroscopy. The Kd for calcium was found to be 1.4 mM. Magnesium also bound to ceruloplasmin, with Kd = 0.3 and 0.7 mM for the human and sheep
MUSCI, Giovanni +4 more
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Silica dimerization in the presence of divalent cations
Physical Chemistry Chemical Physics, 2022The presence of divalent cations raises activation energy barrier and delays overall dimerization reaction.
Dipak, Prasad, Nilanjan, Mitra
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Prostaglandins and Divalent Cation Metabolism
1978When von Euler (1) first described the prostaglandins thirty years ago, he could not have imagined that these lipids would be implicated in so many physiologic roles. With the rediscovery of these lipids and the elucidation of their chemical structure by Bergstrom and Samuelsson (2), a considerable volume of information has been generated.
M A, Kirschenbaum, C R, Kleeman
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Citrate Anticoagulation and Divalent Cations in Hemodialysis
Blood Purification, 2008Anticoagulation with citrate in combination with a calcium-free, magnesium-containing dialysate (Ca-Mg+) and intravenous supplementation of calcium is a safe procedure in renal failure patients at high risk of bleeding. Since magnesium may antagonize the anticoagulant effect of citrate by forming complexes with citrate, we studied the in vitro and in ...
M J, Janssen +4 more
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Divalent cation binding to erythrocyte spectrin
Biochemistry, 1993Erythrocyte spectrin dimers and separated alpha- and beta-spectrin chains bound 45Ca2+ after electrophoresis on native or sodium dodecyl sulfate-polyacrylamide gels, blotting, and 45Ca2+ overlay. Flow dialysis and equilibrium dialysis revealed two binding components: high-affinity, Ca(2+)-specific sites with kd = 4 x 10(-7) M and n = 100 +/- 20 per ...
C J, Wallis +2 more
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Monovalent and divalent cations in hypertension
Preventive Medicine, 1985The relationship of four cations (sodium, potassium, calcium, magnesium) to hypertension is reviewed. It seems reasonable to advise some reduction in sodium intake, and an initial goal of a mean intake of 120 mmole per day for men and 90-100 mmole per day for women is suggested.
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