A note on Taylor boundary conditions for accurate image restoration

In recent years, several efforts were made in order to introduce boundary conditions for deblurring problems that allow to get accurate reconstructions. This resulted in the birth of Reflective, Anti-Reflective and Mean boundary conditions, which are all based on the idea of guaranteeing the continuity of the signal/image outside the boundary. Here we propose new boundary conditions that are obtained by suitably combining Taylor series and finite difference approximations. Moreover, we show that also Anti-Reflective and Mean boundary conditions can be attributed to the same framework. Numerical results show that, in case of low levels of noise and blurs able to perform a suitable smoothing effect on the original image (e.g. Gaussian blur), the proposed boundary conditions lead to a significant improvement of the restoration accuracy with respect to those available in the literature.     

Glycoproteomic characterization of carriers of the CD15/Lewis<Superscript>x</Superscript> epitope on Hodgkin's Reed-Sternberg cells

Background  

The Lewis^x trisaccharide, also referred to as the CD15 antigen, is a diagnostic marker used to distinguish Hodgkin's lymphoma from other lymphocytic cancers. However, the role of such fucosylated structures remains poorly understood, in part because carriers of Lewis^x structures on Hodgkin's Reed-Sternberg cells have not been identified.     

Fourier analysis,correlation functions and nonadiabatic electron transfer: Wavepackets and exact representations

Summary We investigate the validity of several common approximations in the analysis of nonadiabatic intramolecular electron transfer rate constants. Utilizing the Fourier representation of the golden rule form, we study the evolution of the vibrational correlation function that represents the density-of-states-weighted Franck-Condon factor. In particular, we test the validity of the perturbation theoretic golden rule form and of the Gaussian wavepacket representation for the vibrational wavefunctions against numerically exact quantum mechanical propagations. Although specific cases are found in which both of these break down, for a wide range of conditions (including anharmonic behavior and frequency changes), both the Gaussian wavepacket representation and the golden rule are excellent approximations.     

Zur Analytik von Morocromen in biologischem Material

Zusammenfassung Morocromen-Eigenschaften (Löslichkeit, Extraktion, Stabilität, UV, Fluorescenz, DC) werden beschrieben. Aus biologischem Material (Blut, Organe, Galle, Speichel, Schweiß, Faeces und Urin) ist Morocromen bei pH 8,6 mit Chloroform nahezu quantitativ extrahierbar. Quantitative Bestimmung ist UV-spektroskopisch (330 nm), besser fluorimetrisch durchführbar: direkte Bestimmung bei 330/440 nm als Morocromen oder nach Abbau (4 N H₂SO₄, 100° C) zum stärker fluorescierenden 7-Amino-Derivat bei 309/483 nm ist bei Mengen von <0,01–5 g/ml nach vorheriger DC möglich.Die untere Nachweisgrenze liegt zwischen 0,02 g/ml (Blut) und 0,008 g/ml (Urin), die Reproduzierbarkeit zwischen 0,7% (Blut) und 3,0–3,6% (Urin). Die Methoden sind für pharmakokinetische Untersuchungen geeignet.

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Analysis of morocromen in biological material

Summary Properties of morocromen (solubility, extractability, stability, UV-, fluorescence and TLC-properties) are described. Morocromen can be extracted quantitatively from biological material (blood, organs, bile, saliva, sweat, faeces and urine) with chloroform at pH 8.6. Quantitative determination can be carried out either by UV-spectroscopy (330 nm), or even better by fluorometry: direct determination at 330/440 nm as morocromen or after degradation (4N H₂SO₄, 100° C) to the more intensely fluorescing 7-amino-derivative (at 309/483 nm) is possible with amounts of <0.01 to 5 g/ml after previous TLC. The lower detection limit is between 0.02 g/ml (blood) and 0.008 g/ml (urine), reproducibility between 0.7% (blood) and 3.0–3.6% (urine). The methods can be used for pharmacokinetic measurements.

     

Transition radiation detector for relativistic particles at accelerator energies

Transition radiation (TR) has been investigated by using the arithmetic mean and the geometric mean of the pulses from 10 multiwire proportional chambers. The discrimination factor for different kinds of particles has been determined. Also the dependence of the intensity of TR on the Lorentz factor γ has been measured and compared with theoretical calculations.     

Elemental chemical analysis of submerged targets by double-pulse laser-induced breakdown spectroscopy

Double-pulse laser-induced plasma spectroscopy (DP-LIPS) is applied to submerged targets to investigate its feasibility for elemental analysis. The role of experimental parameters, such as inter-pulse delay and detection time, has been discussed in terms of the dynamics of the laser-induced bubble produced by the first pulse and its confinement effect on the plasma produced by the second laser pulse. The analytical performance of this technique applied to targets in a water environment are discussed. The elemental analysis of submerged copper alloys by DP-LIPS has been compared with conventional (single-pulse) LIBS in air. Theoretical investigation of the plasma dynamics in water bubbles and open air has been performed.