Gamma Radiation Induced Modification on Optical Gap of Polycarbonate Detectors
Issue:
Volume 5, Issue 3, June 2017
Pages:
24-29
Received:
3 September 2017
Accepted:
27 September 2017
Published:
30 October 2017
Abstract: Exposure of polycarbonate detectors to high γ- ray doses causes a great effect on their structural. Samples of Makrofol DE 1-1 nuclear track detectors (NTDs) were irradiated with gamma doses in the range of 1-100 kGy using 1.25 MeV 60Co source of dose rate 4 kGy/h. The optical characterization of these detectors have been studied through the measurements of UV-visible absorption spectra of blank and γ- irradiated samples. The UV-visible spectra of γ- irradiated samples revealed color centers in the range (310-320 nm). Direct and indirect allowed optical band gap energies, refractive index (n), the number of carbon atoms per conjugated length (N), and the number of carbon atoms per cluster (M) for pristine and γ-irradiated samples were determined. Results revealed that optical band gaps decrease, while n, N, and M increase with increasing of γ-irradiated doses. This study sheds light on the basis of γ-interaction mechanisms with the polymeric detectors and use of Makrofol DE 1-1 in gamma dose determination.
Abstract: Exposure of polycarbonate detectors to high γ- ray doses causes a great effect on their structural. Samples of Makrofol DE 1-1 nuclear track detectors (NTDs) were irradiated with gamma doses in the range of 1-100 kGy using 1.25 MeV 60Co source of dose rate 4 kGy/h. The optical characterization of these detectors have been studied through the measur...
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Fourier Transformed Infrared Spectroscopy Analysis of Constituents of Lemon Essential Oils from Algeria
Hicham Boughendjioua,
Samah Djeddi
Issue:
Volume 5, Issue 3, June 2017
Pages:
30-35
Received:
9 June 2017
Accepted:
26 June 2017
Published:
30 October 2017
Abstract: Three main tools are used to determine the structures of organic molecules. These tools are infrared (IR) spectroscopy, mass spectrometry (MS) and nuclear magnetic resonance (NMR) spectroscopy. Organic molecules absorb light (infrared, ultraviolet, etc.) at particular wavelengths based on different vibrational modes unique to the specific functional groups and structural features. In the present study, the volatile compounds of Lemon (Citrus limon L.) collected from Collo, Skikda city (Algeria), were detected and identified by Fourier Transformed Infrared Spectroscopy (FTIR) analysis (qualitative identification). FTIR allowed us to identify 10 volatile compounds and indicated than the functional groups of the essential oils are C-H (Alkene), C-H (aromatic) and C=C. The obtained results have shown that the essential oils can be fully utilized for pharmacy, cosmetology and industry.
Abstract: Three main tools are used to determine the structures of organic molecules. These tools are infrared (IR) spectroscopy, mass spectrometry (MS) and nuclear magnetic resonance (NMR) spectroscopy. Organic molecules absorb light (infrared, ultraviolet, etc.) at particular wavelengths based on different vibrational modes unique to the specific functiona...
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