BACKGROUND AND OBJECTIVES Diarrhea is one of the most prevalent diseases in the world, specially in developing countries. One of the most important causative agents of bacterial diarrhea is diarrheagenic Escherichia coli (DEC) which causes gastroenteritis and this group involving enterotoxigenic E. coli (ETEC), enteropathogenic E. coli (EPEC), enteroaggregative E. coli (EAEC), enterohemoragic E...

Geographical DistribuHon. BLACKWAfER fever is met with in intensely malarious districts, with high endemic indices Dinajpur district in North Bengal is specially mentioned by Sir Leonard Rogers in his book 011 " Fevers in the Tropics " as one of the districts with a notoriously high mortality; this obviously accounts for the occurrence of 'blackwater fever. During the 18 months I was in the dis...

Helicobacter pylori colonizes the human gastric epithelium and causes diseases such as gastritis, peptic ulcers, and stomach cancer. Undecaprenyl pyrophosphate synthase (UPPS), which catalyzes consecutive condensation reactions of farnesyl pyrophosphate with eight isopentenyl pyrophosphate to form lipid carrier for bacterial peptidoglycan biosynthesis, represents a potential target for developi...

Progress in lithography and nanofabrication @E. Di Fabrizio et al., Nature ~London! 401, 895 ~1999!# has made it possible to apply differential interference contrast ~DIC! in x-ray microscopy using an original x-ray doublet lens based on two specially developed zone plates. Switching from bright-field imaging ~absorption contrast! to x-ray DIC, we observe, similar to visible-light microscopy, a...

Ustiloxins A (1a), B (1b), C (1c), D (1d) and E (1e), antimitotic peptides, have been isolated from the water extract of false smut balls caused on the panicles of rice plant by a fungus Ustilaginoidea virens. The structure of 1b was assigned from its spectral property and its amino acid analysis in relation to 1a whose structure was determined previously by a combination of X-ray crystallograp...

frequently encountered by medical practitioners in the tropics. A long-standing infection with E. histolytica is the cause of much sickness and incapacity in India, specially among the European community. The presence of this organism in the system, however scanty, devitalizes the patient considerably and renders him susceptible to other infections; it is responsible for producing a variety of ...

The Swedish Question Answering Pro j ect (SQAP) aims at handli~g many digferent kinds of facts, and nat only facts in a small dpecial application area. The SQAP data base consists of a network of nodes correspdnding to objects, properties, and events in the real.world. Deduction can be performed, and deduction rules can be input i n natural language and stored in the data base. This report desc...

Tomographic reconstruction from PET data is an ill-posed problem that requires regularization. Recently, Daubechies et al. [1] proposed an l (1) regularization of the wavelet coefficients that can be optimized using iterative thresholding schemes. In this paper, we extend this approach for the reconstruction of dynamic (spatio-temporal) PET data. Instead of using classical wavelets in the tempo...

The Local Wigner-Ville Distribution (LWVD) extends the Cohen's class time-frequency distributions (TFD) by the de nition of a kernel for each time-frequency point(local kernel). The subject of the paper is the determination of these local kernels for interference reduction. Starting from the simple idea of the local limitation of the Wigner-Ville TFD integral bounds, a method is presented to es...

The objective of this paper is to analyse the relationship between information processing needs and capabilities. Both outsourcing and diversification influence the amount and the type of investments that firms perform in information technologies. In particular, we expect more vertically desintegrated firms to be more likely to use those technologies that facilitate interorganizational communic...