Eosinophilic granuloma is benign end of the spectrum of the Langerhans cell histiocytosis (LCH) which is characterized by solitary or multiple lesions in bones, skin, lung, lymph node etc. Here, we present a case of a 13-year old boy with pain and swelling in the right parietal region of skull with no other complaint. A computerized tomography (CT) scan and subsequent fine needle aspiration cyt...

This experiment is an exercise in optical spectroscopy in a study of the spectra of “hydrogenic” atoms, i.e. atoms with one “optical” electron outside a closed shell of other electrons. Measurements include finding: the Balmer lines of atomic hydrogen and the fine structure of sodium lines; determination of the mass of the deuteron from the isotope shift. A high-resolution scanning monochromato...

There are many different ways to subdivide the spectrum of a bounded linear operator; some of them are motivated by applications to physics (in particular, quantum mechanics). In a series of papers, B.E. Rhoades and M. Yildirim previously investigated the spectra and fine spectra for factorable matrices, considered as bounded operators over various sequence spaces. In the present paper, approxi...

Background For decades, FTIR spectroscopy has been the method of choice for detecting, identifying, and establishing the purity of chemical compounds based on their infrared absorption properties. The method typically employs a thermal radiation source emitting in the 2.5 to 25 μm spectral range (e.g., GlobarTM ). The light emitted by the source is split into two beams, one of them passing thro...

Results from a comprehensive new analysis on the excitation spectrum of the QCD string are presented. A rapid onset of string formation is observed in the spectrum on a length scale of 2 fm, with Dirichlet boundary conditions. The crossover from the short distance spectrum towards string excitations and an observed fine structure in the 1–3 fm range are related to effective string theory. The d...

An apparatus is reported for real-time Raman monitoring of reactions performed using continuous-flow processing. Its capability is assessed by studying four reactions, all involving formation of products bearing α,β-unsaturated carbonyl moieties; synthesis of 3-acetylcoumarin, Knoevenagel and Claisen-Schmidt condensations, and a Biginelli reaction. In each case it is possible to monitor the rea...