Results 241 to 250 of about 327,043 (288)

Divalent Cation Interactions with Oligogalacturonides

Journal of Agricultural and Food Chemistry, 2001
The 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, 1988
The 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, Delben F., PAOLETTI, SERGIO   +2 more
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Competition between kaolinite flocculation and stabilization in divalent cation solutions dosed with anionic polyacrylamides

Water Research, 2012
Divalent cations have been reported to develop bridges between anionic polyelectrolytes and negatively-charged colloidal particles, thereby enhancing particle flocculation.
Mark A. Schlautman, Erik Toorman, Michael Fettweis   +2 more
exaly   +1 more source

Divalent cation binding to ceruloplasmin

Biometals, 1996
Binding 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, diPatti MCB, Petruzzelli R, Giartosio A, Calabrese L.   +4 more
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Silica dimerization in the presence of divalent cations

Physical Chemistry Chemical Physics, 2022
The 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

1978
When 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, 2008
Anticoagulation 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, P C, Huijgens, A A, Bouman, P L, Oe, J, van der Meulen   +4 more
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Divalent cation binding to erythrocyte spectrin

Biochemistry, 1993
Erythrocyte 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, J A, Babitch, E F, Wenegieme   +2 more
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Monovalent and divalent cations in hypertension

Preventive Medicine, 1985
The 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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Intracellular divalent cations and neuronal excitability

Canadian Journal of Physiology and Pharmacology, 1979
Intracellular injections of Mg into cat spinal motoneurones have a depolarizing action, associated with a fall in input conductance, and depression of the postspike hyperpolarizing after-potential (a.h.p.) as well as its underlying conductance increase. There is also an increase in excitability, sometimes leading to outright discharge, and a change in
K, Krnjević, Y, Lamour, J F, MacDonald, A, Nistri, E, Puil, R, Werman   +5 more
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