introduction: iache (acetylcholinesterase) is one of the plasma’s enzymes that plays a crucial role in nervous signal transduction in synapses and is responsible for the hydrolysis of ach. material & method: we investigated three methods for the determination of ache in human blood serum, using three different assays. michel methods are based on the measurement of hydrogen ion produced in proce...

HE pushing and pulling forces that characterize the rocess of mitosis have fascinated and frustrated biolo-ists for over a century. While considerable progress has been made in understanding how these forces are used in mitosis, the nature of the molecules that generate the forces has remained obscure., have demonstrated that members of the kinesin su-perfamily of microtubule motors are likely ...

Dynein ATPases constitute a growing class of microtubuleassociated molecular motors. Although first characterized as force generators in cilia and flagella, dyneins are also cytoplasmic motor proteins with potential roles in axonal transport (Vallee et al., 1988), intracellular organization (Scholey et al., 1984; Lacey and Haimo, 1992) and mitosis (Pfarr et al ., 1990; Steuer et al ., 1990). Wh...

Despite their frequent occurrence and strong impacts on native biota, biological invasions can long remain undetected. One reason for this is that an invasive species can be morphologically similar to either native species or introduced species previously established in the same region, and thus be subject to mistaken identification. One recent case involves congeneric invasive parasites, copep...

Remerciements Au terme de ces trois années de thèse passéesà Montpellier, c'est avec une immense joie que j'´ ecris ces quelques lignes de remerciements. J'aimerais tout d'abord exprimer ma gratitudè a Messieurs Christian Seassal, Gérard Tayeb et Diederik Wiersma pour avoir consacré un temps précieuxà la lecture détaillée de mes travaux, età Messieurs Walter Kob, Jean-Michel Lourtioz, Eric Akma...

in this paper, a new spectral-iterative method is employed to give approximate solutions of fractional logistic differential equation. this approach is based on combination of two different methods, i.e. the iterative method cite{35} and the spectral method. the method reduces the differential equation to systems of linear algebraic equations and then the resulting systems are solved by a numer...