Using a programmable mixing pump, light scattering flow chamber, refractive index detector, and single capillary viscometer, the batch (unfractionated) characterization of polymers in solution has been automated. Three different schemes to produce polymer concentration gradients were used, and values for weight average mass Mw, root mean square radius of gyration ^S & , second virial coefficien...

The different behaviour of first order interferences and second order correlations are investigated for the case of two coherently excited atoms. For intensity measurements this problem is equivalent to Young’s double slit experiment and was investigated in an experiment by Eichmann et al. [Phys. Rev. Lett. 70, 2359 (1993)] and later analyzed in detail by Itano et al. [Phys. Rev. A 57, 4176 (19...

The sensitivity of bacteria to the bactericidal activity of serum depends on the structure and organization of the bacterial outer membrane. Sialic acid has been found in the O-specific region of bacterial lipopolysaccharide (LPS) and it plays an essential role in protecting Gram-negative bacteria against the bactericidal activity of human and animal serum. The susceptibility of Gram-negative b...

We report the detection of the (1,1) and (2,2) metastable lines of ammonia (NH3) in the molecular cloud associated with the Wolf–Rayet (WR) nebula NGC2359. Besides the CO and H2, this is the first molecule detected in the environs of a WR star. Width (∆V1/2 = 3km s ) and radial velocity (VLSR ∼ 54 km s ) indicate that the NH3 lines arises from the molecular cloud which is interacting with the W...

In our previous work we presented a model-based approach to perform robust, high-speed face localization based on the Hausdorff distance. A crucial step during the design of the system is the choice of an appropriate edge model that fits for a wide range of different human faces. In this paper we present an optimization approach that creates and successively improves such a model by means of ge...

1. Cogan DG: Pathology of the optic nerve. In: Albert DM, Jakobiec FA, eds: Principles and Practice of Ophthalmology. Vol 4. Philadelphia: WB Saunders Co; 1994:2359-2371. 2. Weiss A, Martinez C, Greenwald M. Microphthalmos with cyst: clinical presentations and computed tomographic findings. J Pediatr Ophthalmol Strabismus. 1985;22:6-12. 3. April MM, Seymour BT, Duboys E, et al. Massive cystic h...

We analyze the physical conditions of the outflow seen in QSO 2359–1241 (NVSS J235953-124148), based on high resolution spectroscopic VLT observations. This object was previously studied using Keck/HIRES data. The main improvement over the HIRES results is our ability to accurately determine the number density of the outflow. For the major absorption component, level population from five differ...