The use of pilastin for treating patients with chronic suppurative otitis media

Gas gangrene is caused by multiple species of Chlostridium, generally as a complication of traumatismus producing necrotic infections. This kind of infection is rare and specially uncommon in childhood. A case of post-traumatic Chlostridium perfringens infection is presented in a two year old girl after an open fracture of the hand. In order to reveal the extension of the process different examinations were performed including radiography of the hand, angiography and infrared thermography. These studies are describen and correlated, specially the angiography and the infrared thermography as a non-invasive method, as well as the treatment and evolution.     

Structural and Dielectric Study of Thin Amorphous Layers of the Ge–Sb–Te System Prepared by RF Magnetron Sputtering

Semiconductors - The results of studying the structure and processes of dielectric relaxation in thin layers of Ge–Sb–Te are presented. The found permittivity dispersion and occurrence...     

Density-Dependence of Surface Transport in Tellurium-Enriched Nanograined Bulk Bi2Te3

Three-dimensional topological insulators (3D TI) exhibit conventional parabolic bulk bands and protected Dirac surface states. A thorough investigation of the different transport channels provided by the bulk and surface carriers using macroscopic samples may provide a path toward accessing superior surface transport properties. Bi₂Te₃ materials make promising 3D TI models; however, due to their complicated defect chemistry, these materials have a high number of charge carriers in the bulk that dominate the transport, even as nanograined structures. To partially control the bulk charge carrier density, herein the synthesis of Te-enriched Bi₂Te₃ nanoparticles is reported. The resulting nanoparticles are compacted into nanograined pellets of varying porosity to tailor the surface-to-volume ratio, thereby emphasizing the surface transport channels. The nanograined pellets are characterized by a combination of resistivity, Hall- and magneto-conductance measurements together with (THz) time-domain reflectivity measurements. Using the Hikami-Larkin-Nagaoka (HLN) model, a characteristic coherence length of ≈200 nm is reported that is considerably larger than the diameter of the nanograins. The different contributions from the bulk and surface carriers are disentangled by THz spectroscopy, thus emphasizing the dominant role of the surface carriers. The results strongly suggest that the surface transport carriers have overcome the hindrance imposed by nanoparticle boundaries.     

Optimisation of X-ray examinations in Lithuania: start of implementation in mammography

Optimisation of medical X-ray examinations is very important for the enhancement of the reliability of the examination and for the reduction of the radiation dose to patients. Results of investigations of doses to patients during mammography using thermoluminescence dosemeters at different hospitals are presented together with a brief overview of the situation for mammography in Lithuania. It is shown that the entrance surface air kerma varies in a broad range and differed from hospital to hospital. Nevertheless the calculated values of average glandular dose (AGD) for a 'standard' breast being relatively high were comparable with those (3.2 mGy per exposure at net optical density 1.4) currently accepted by international authorities. Differences in AGD values evaluated at different hospitals demonstrate the existing potential for optimisation of the mammography screening procedures. The results of this investigation will be included in a database for patient doses in Lithuania and used for establishing a national reference dose level for mammography. Currently, reference levels recommended by international authorities are used in Lithuania.     

Electric Charge Limitation in Electroflocking Technology

Fibre Chemistry - In present paper, the question of electric charges acquired by fibers in the process of their application to a fabric surface using the electroflocking technology is considered....     

Using Raman spectroscopic imaging for non‐destructive analysis of filler distribution in chalk filled polypropylene

A feasibility study on using Raman spectral imaging for visualization and analysis of filler distribution in chalk filled polypropylene samples has been carried out. The spectral images were acquired using a Raman spectrometer with 785 nm light source. Eight injection‐molded samples with concentration of chalk 25% and 50% were used in the experiment. Two methods for spectral unmixing were applied to the images and both revealed almost identical distribution maps over the samples’ surface. The maps also correlated with the ones obtained for several separated peaks, typical for the chalk and the polypropylene. The revealed distribution patterns show the same trend for each concentration level and agree with theoretical explanation of plastic flow into an injection molding tool. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133, 43016.     

Model of oxygen cutting of a metal plate with chemical heat release

A model for the process of oxygen cutting of a metal plate is proposed which takes into account heating by external and internal heat sources, heat release from the cutting zone and reducing the thickness of the cutting geometry. The model was implemented numerically. It is shown that the model can describe different cutting modes: surface cutting, severing, and cutting in the kinetic and diffusion regimes. From the calculations results, the temperature field was constructed and the effect of the parameters on the thickness of the workpiece and the shape of the cutting edge was studied. The results are qualitatively consistent with experimental data.