On induced-modifications in optical properties of Makrofol® DE 1-1 SSNTD by UVB and UVA

The induced modifications in the optical properties of Makrofol® DE 1-1 solid state nuclear track detectors upon irradiation by UVB (302 nm) and UVA (365 nm) were characterized and compared. Makrofol® DE 1-1 detectors were irradiated separately for different durations with UVB (302 nm) and UVA (365 nm). The measurements revealed insignificant changes were observed at all in UVA (365 nm)-irradiated Makrofol® DE 1-1, irrespective the irradiation time (dose). All UVB (302 nm)-irradiated Makrofol® DE 1-1 detectors show a substantial red shift in UV–Vis spectra and a continuous increase in absorbance as the exposure time (Dose) to UVB increases. UVC-irradiated Makrofol® DE 1-1 exhibits absorption bands at 315 ± 5 nm in UV–visible spectra. The absorption increases exponential with the increasing the UVB irradiation time gets saturated started from 75 h to 400 h. In the visible light range no significant changes were observed in Makrofol® DE 1-1 detector irrespective the exposure time to UVB of 302 nm. It is found that the direct band gap is higher than indirect band gap and both decrease with the increase in the irradiation time of UVB of 302 nm. The obtained results of the Urbach energy and carbon atoms per cluster indicate that both increase with the increase in the irradiation time to UVB (302 nm). The induced modification in the optical properties of Makrofol® DE 1-1 can be used in UVB dosimetry, meanwhile it is not applicable for UVA of 365 nm

The utility of lung ultrasound in evalu

Aims: To study the role of lung ultrasound (LUS) in the evaluation of bronchiolitis in infants. Patients and methods: 25 hospitalized infants, their mean age (6.94 ± 4.48 months), 7 males and 18 females. All patients underwent chest X-ray (CXR) and lung ultrasound after full clinical examination with suspicion of bronchiolitis and evaluation for corresponding findings. Results: In 25 infants suspected clinically to have bronchiolitis, 11 patients had mild degree of bronchiolitis, other 11 patients had moderate degree and only 3 cases had severe form of bronchiolitis. The chest X-ray and lung ultrasound were done for all patients; the chest X-ray findings were non-specific including lung plethora in 6 patients, hyperinflation in 3 patients and peribronchial thickenings in 1 patient. The lung ultrasound findings were significant and variable ranged from subpleural lung consolidation in 3 cases, compact B-lines in 6 cases, pleural line abnormalities (thickening and irregularity) in 8 cases and small isolated B-lines in 11 cases. On follow-up of infants, the lung ultrasound findings were correlated positively with the clinical course of the disease. Conclusions: Lung ultrasound played an important role in the diagnosis, management and follow-up of infants with clinical suspicion of bronchiolitis

β-Oxo Anilides in Heterocyclic Synthesis: Novel Synthesis of Substituted Pyridazinones, Pyridine, Pyrimidines and Pyrazolotriazines A. M. Hussein et al

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