V. malherbe – radio u. s.

U N I V E R S I T

NITROIMIDAZOLES VII [I]. SYNTHESES, ANTIBACTERIAL AND ANTIFUNGAL ACT I V I T I E S OF 4 - S U B S T I T U T E D - 2 - TWIAZOLYLHYDRAZONES

Reaction of readily available 2-formyl -1-methyl-5-nitroimidazole (1) with 4-substituted-2-hydrazinothiazoles (2) afforded 2-formyl-l-methyl-5- nitroimidazole 4-substituted -2- thiazolylhydrazones (3). Reaction of thiochromitn-4-one (4) with thiosemicarbazide gave thiochroman-4- one thiosemicarbazone (5). Reaction of compound 5 with clc- haloaldehyde or ketones y ielded thiochroman--#-one ...

S U

In recent years, several new architectures have been developed for supporting multimedia applications such as digital video and audio. However, quality-of-service (QoS) routing is an important element that is still missing from these architectures. In this paper, we consider a number of issues in QoS routing. We first examine the basic problem of QoS routing, namely, finding a path that satisfi...

U . S .

This paper reviews both theoretical and empirical studies of financial transmission rights (FTRs) in the major U.S. wholesale power markets and provides a simple illustrative two-stage model to study the competitive behaviors of electricity generators (wholesale power sellers) and load serving entities (LSEs)(wholesale power buyers) and the welfare effects of FTRs in the restructuring U.S. whol...

Upper bounds for gcd ( u − 1 , v − 1 ) , u , v S - units , generalisations and applications ( joint works with Zannier )

Let a > b > 1 be integers. We proved that if bn−1 divides an−1 infinitely often, then a is a power of b. In a joint work with Bugeaud, we also proved that the inequality gcd(an−1, bn−1) ¿ exp(2n) holds for large n, whenever a, b are multiplicatively independent. This fact has been generalised to an analogue inequality where an, bn are replaced by arbitrary S-units in a number field; we also dis...