BACKGROUND Selection of genes involved in metabolic pathways could target them differently depending on the position of genes in the pathway and on their role in controlling metabolic fluxes. This hypothesis was tested in the carotenoid biosynthesis pathway using population genetics and phylogenetics. METHODOLOGY/PRINCIPAL FINDINGS Evolutionary rates of seven genes distributed along the carot...

Fish assemblage was investigated during the study of longitudinal profile of the Ehania River Basin in south-eastern Côte d’Ivoire. This area is subjected to intense human activities with many plantations (palm tree, banana, pineapple, coffee, rubber and cocoa). Samples were collected, with gillnets of different mesh sizes, through 6 sampling surveys during dry and rainy seasons from February 2...

rade control structures are used to control bed erosion in steep small rivers mostly in the mountains. scour downstream of this structure can lead to failure. over the past years, the effect of different variables on this phenomena have been studied, however the effect of upward seepage which is common due to head difference of the banks water table or water surface level between the upstream a...

In an industry characterised by secret vertical contracts, we consider a benchmark case where two vertical chains exist, with two upstream manufacturers selling to two downstream retailers, and show that the equilibrium prices are independent of whether upstream or downstream ̄rms have all the bargaining power. We then analyse two alternative mergers, and show that a downstream merger (which gi...

In this paper we discuss the issues involved an forming proper knowledge representation for process planning. Ajter 01 brief review the knowledge representation schemes used in the existing reported CAPP systems we describe the process planning function and its knowledge requirements. Based on these requirements, we present a knowledge representation scheme Chat allows both upstream and downstr...