Sixteen delta 4-uronate monosaccharides were chemically synthesized. Their carboxy group was protected as a methyl or benzyl ester, the anomeric hydroxyl group as a benzyl glycoside and the 2 and 3 hydroxyl groups were protected with different substitution patterns as both ester and ether derivatives. Disaccharides containing delta 4-uronates were prepared from heparin layses. Their carboxy gro...

This talk describes some applications of two kinds of observation estimate for the wave equation and for the damped wave equation in a bounded domain where the geometric control condition of C. Bardos, G. Lebeau and J. Rauch may failed. 1 The wave equation and observation We consider the wave equation in the solution u = u(x, t)    ∂ t u−∆u = 0 in Ω× R , u = 0 on ∂Ω× R , (u, ∂tu) (·, 0) = (u...

(2S)[3,3,3-2H3]Isobutyrate, sodium salt, was synthesized and administered intraperitoneally to normal rats. Urinary organic acids were analyzed by gas chromatography-mass spectrometry. 3-Hydroxyisobutyric acid excreted by the rats, analyzed as both a methyl and an isopropyl ester, was found to be enriched almost exclusively with two deuteriums in the hydroxymethyl moiety of the molecule. This r...

for VBR tra c in ATM networks Srinivasan Ramaswamy Newbridge Networks Corporation 600 March Road, P.O. Box 13600 Kanata, Ontario, CANADA K2K 2E6 Tel: (613) 591-3600 [email protected] Pawel Gburzynski University of Alberta Department of Computing Science Edmonton, Alberta, CANADA T6G 2H1 Tel: (403) 492-2347 [email protected] Abstract: The role of call admission control (CAC) in high-speed n...

The solution conformation of homogeneous, heparin-derived hexasaccharide (residues A, B, C, D, E, F) has been investigated by using 1H-NMR spectroscopy. Intra-ring conformations have been defined by J-coupling constants and inter-proton nuclear Overhauser effects (NOEs), and the orientation of one ring with respect to the other has been defined by inter-ring NOEs. NOE-based conformational model...

The photochromic reaction dynamics of the spiropyran molecule 1’,3’,3’-trimethyl-6-hydroxyspiro[2H1 -benzopyran-2,2’-indoline] (HBPS) in solution have been studied with picosecond and femtosecond transient electronic absorption spectroscopy. Following excitation near 300 nm, the C-0 bond of the molecule breaks in less than 100 fs to form a metastable species. A small fraction of this metastable...