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High-resolution infrared spectroscopic determination of the nν5±n vibrational energies of HCCN and DCCN (2001)

Hung, P. Y. ; Sun, F. ; Hunt, N. T. ; [et al.]

College Park, Md. : American Institute of Physics (AIP)

The Journal of Chemical Physics 115 (2001), S. 9331-9339

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ISSN: 1089-7690

Source: AIP Digital Archive

Topics: Physics , Chemistry and Pharmacology

Notes: The high-resolution infrared kinetic spectra of HCCN and DCCN have been recorded, the former between 3395 and 3481 cm−1 and the latter in the 2517–2593 cm−1 region. A total of four dominant Q branches were observed and have been subsequently assigned to the ν1+2ν5±2←ν5±1, ν1+3ν5±3←2ν5±2 bands of the two isotopomers. The band origins have been determined to be 3420.666(1), 2544.743(2), 3460.912(2), and 2573.480(1) cm−1 respectively. These new values have been used in conjunction with the previously obtained ν1+2ν5±2←2ν5±2 band origins of HCCN and DCCN to obtain 2ν5±2←ν5±1 vibrational energies of 212.822(1) and 133.106(1) cm−1 for HCCN and DCCN, respectively. Semirigid bender calculations of the energy levels of these molecules have been carried out. By adjusting the height of the barrier to linearity, excellent agreement with experimental data has been attained. © 2001 American Institute of Physics.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.1413981

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A halo jacket for stabilisation of the paediatric cervical spine (1993)

Marks, D. S. ; Roberts, P. ; Wilton, P. J. ; [et al.]

Springer

Archives of orthopaedic and trauma surgery 112 (1993), S. 134-135

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ISSN: 1434-3916

Source: Springer Online Journal Archives 1860-2000

Topics: Medicine

Notes: Summary Stabilisation of the paediatric cervical spine may be necessary in the management of trauma, infection and deformity. Surgery is technically difficult due to the immaturity of the bony elements and therefore external support is generally preferred. Our experience of halter traction and Minerva casts is that they either fail to achieve stability or are poorly tolerated. Halo pins are associated with significant pin tract complications in children. The technique for application of a plaster halo jacket is presented, together with the results of its use in eight children. Attention is drawn to the ease of application, tolerance by the patients and absence of significant complications.