Le brunissement des aliments obtenu lors de leur cuisson est dû à la réaction Maillard (ou glycation protéines) décrite en 1912. Elle lie manière covalente sucres réducteurs et acides aminés. Ugo Schiff Mario Amadori ont décrypté cette qui aboutit formation produits intéressants d’un point vue organoleptique, mais potentiellement nocifs pour santé. La protéines endogènes, dont l’archétype l’hém...

In engineering applications, especially in the field of modern military defence, the cylindrical shells, conical shells and coupled conical-cylindrical shells are basically simplified models of many types of weapons and equipment, such as aircraft, missiles, and submarines. The study of free vibrational characteristics of cylindrical shells is comprehensive. Initially, researchers1-5 investigat...

The aim of this study is to investigatethe effective parameters on vibrations of circular cylindrical shells with fixed rotary speed andresting elastic foundation by means of analytical and finite element numerical simulation. First, the governing equations are derived using the theory of Donnell, considering the centrifugal forces,Coriolis acceleration, and the initial annular tension. Then, t...

In this paper, a comparison is conducted between two different formulations of the van der Waals interaction coefficient layers, as applied to vibrations double-walled carbon nanotubes (DWCNTs); specifically, evaluation natural frequencies achieved through Ru’s and He’s formulations. The actual discrete DWCNT modelled by means couple concentric equivalent continuous thin cylindrical shells, whe...

Swarm is a multi agent software platform for the simulation of complex adaptive systems In the Swarm system the basic unit of simulation is the swarm a collec tion of agents executing a schedule of actions Swarm supports hierarchical model ing approaches whereby agents can be composed of swarms of other agents in nested structures Swarm provides object oriented libraries of reusable components ...

We present a combined theoretical and experimental study of the buckling of a thin film wrapped around a sphere under the action of capillary forces. A rigid sphere is coated with a wetting liquid, and then wrapped by a thin film into an initially cylindrical shape. The equilibrium of this cylindrical shape is governed by the competing effects of elasticity and capillarity: elasticity tends to ...

IN this paper, I shall not attempt to list chronologically the advances which have been made in reproductive physiology but will merely discuss a few which happen to be of greater interest to me. Regrettably, modern biological textbooks provide little information on the historical background to the advances which have been made in various phases of biology. Obviously, teachers have had to choos...

We present a simple two-dimensional dynamical system where two nonlinear terms, exerting respectively positive feedback and reversal, compete to create a singularity in finite time decorated by accelerating oscillations. The power law singularity results from the increasing growth rate. The oscillations result from the restoring mechanism. As a function of the order of the nonlinearity of the g...