Audiological correlates of tumor parameters in acoustic neuromas

The objective of this study was undertaken to evaluate a correlation of pure tone audiometry, speech audiometry with tumor size, the presence of intrameatal extension, contralateral pure tone audiometry, and contralateral speech audiometry results at acoustic neuroma (AN) patients. Seventy-six patients with a unilateral-cerebellopontine angel tumor with/without internal acoustic canal (IAC) were included in this study. Data on pure tone audiometry, speech discrimination scores (SDS), speech reception thresholds (SRT), tumour size, and extension to IAC were analyzed retrospectively. As a result, patients with unilateral ANs had an asymmetric sensorineural hearing loss and had an asymmetric finding on the results of speech audiometry was present. We could not find any correlation between the size of the tumor and the hearing levels at each frequency. In addition, there appeared to be no significant correlation between the extension of tumor to the IAC and the audiological findings. © 2012 Springer-Verlag

TL Accident Dosimetry Measurements on Samples from the Town of Pripyat.

In July 1990, several different types of ceramic samples were collected from the town of Pripyat, situated 3 km NW of the Chernobyl Nuclear Power Plant. The samples were distributed among several laboratories for TL measurement to determine the total absorbed gamma dose at different points within a small area in the most polluted region and to assess the shielding given by the walls of building to the people inside apartment blocks. This paper discusses the types of samples and their suitability for accident dosimetry, the TL measurements, minimum limits of detection for various types of sample and the strengths and limitations of the method in this type of situation. The implications of the results are discussed

Synthesis of benzylidenemalononitrile by Knoevenagel condensation through monodisperse carbon nanotube-based NiCu nanohybrids

Monodisperse nickel/copper nanohybrids (NiCu@MWCNT) based on multi-walled carbon nanotubes (MWCNT) were prepared for the Knoevenagel condensation of aryl and aliphatic aldehydes. The synthesis of these nanohybrids was carried out by the ultrasonic hydroxide assisted reduction method. NiCu@MWCNT nanohybrids were characterized by analytical techniques such as X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HR-TEM), and Raman spectroscopy. According to characterization results, NiCu@MWCNT showed that these nanohybrids form highly uniform, crystalline, monodisperse, colloidally stable NiCu@MWCNT nanohybrids were successfully synthesized. Thereafter, a model reaction was carried out to obtain benzylidenemalononitrile derivatives using NiCu@MWCNT as a catalyst, and showed high catalytic performance under mild conditions over 10-180 min.Dumlupinar UniversityDumlupinar University [2014-05, 2015-35, 2015-50]; Duzce UniversityDuzce University [2015.26.04.371]The authors would like to thank Dumlupinar University (2014-05, 2015-35, and 2015-50) and Duzce University (grant no. 2015.26.04.371) for funding.WOS:0005563883000122-s2.0-85088705103PubMed: 3272817