Understanding the Controlled Polymerization of Methyl Methacrylate with Low Concentrations of 9-(4-Vinylbenzyl)-9H-carbazole Comonomer by Nitroxide-Mediated Polymerization: The Pivotal Role of Reactivity Ratios

2013 ◽  
Vol 46 (3) ◽  
pp. 805-813 ◽  
Author(s):  
Benoît H. Lessard ◽  
Yohann Guillaneuf ◽  
Manoj Mathew ◽  
Kun Liang ◽  
Jean-Louis Clement ◽  
...  
Keyword(s):  
Methyl Methacrylate ◽  
Pivotal Role ◽  
Reactivity Ratios ◽  
Controlled Polymerization ◽  
Low Concentrations ◽  
Nitroxide Mediated Polymerization

Nitroxide-Mediated Polymerization:  The Pivotal Role of thekdValue of the Initiating Alkoxyamine and the Importance of the Experimental Conditions

2006 ◽  
Vol 39 (16) ◽  
pp. 5238-5250 ◽  
Author(s):  
Florence Chauvin ◽  
Pierre-Emmanuel Dufils ◽  
Didier Gigmes ◽  
Yohann Guillaneuf ◽  
Sylvain R. A. Marque ◽  
...  
Keyword(s):  
Pivotal Role ◽  
Experimental Conditions ◽  
Nitroxide Mediated Polymerization

Testosterone Potentiation of Ionophore and ADP Induced Platelet Aggregation : Relationship to Arachidonic Acid Metabolism

1981 ◽  
Vol 46 (02) ◽  
pp. 538-542 ◽  
Author(s):  
R Pilo ◽  
D Aharony ◽  
A Raz
Keyword(s):  
Arachidonic Acid ◽  
Platelet Aggregation ◽  
Unsaturated Fatty Acids ◽  
Human Platelet ◽  
Platelet Rich Plasma ◽  
Arachidonic Acid Metabolism ◽  
Ionophore A23187 ◽  
Low Concentrations ◽  
Induced Aggregation

SummaryThe role of arachidonic acid oxygenated products in human platelet aggregation induced by the ionophore A23187 was investigated. The ionophore produced an increased release of both saturated and unsaturated fatty acids and a concomitant increased formation of TxA2 and other arachidonate products. TxA2 (and possibly other cyclo oxygenase products) appears to have a significant role in ionophore-induced aggregation only when low concentrations (<1 μM) of the ionophore are employed.Testosterone added to rat or human platelet-rich plasma (PRP) was shown previously to potentiate platelet aggregation induced by ADP, adrenaline, collagen and arachidonic acid (1, 2). We show that testosterone also potentiates ionophore induced aggregation in washed platelets and in PRP. This potentiation was dose and time dependent and resulted from increased lipolysis and concomitant generation of TxA2 and other prostaglandin products. The testosterone potentiating effect was abolished by preincubation of the platelets with indomethacin.

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