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Pelvic incidence: a fundamental pelvic parameter for three-dimensional regulation of spinal sagittal curves (1998)

Legaye, J. ; Duval-Beaupère, G. ; Hecquet, J. ; [et al.]

Springer

European spine journal 7 (1998), S. 99-103

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ISSN: 1432-0932

Keywords: Key words Sagittal shape ; Pelvis ; Lordosis ; Spinal balance ; Scoliosis ; Posture

Source: Springer Online Journal Archives 1860-2000

Topics: Medicine

Notes: Abstract This paper proposes an anatomical parameter, the pelvic incidence, as the key factor for managing the spinal balance. Pelvic and spinal sagittal parameters were investigated for normal and scoliotic adult subjects. The relation between pelvic orientation, and spinal sagittal balance was examined by statistical analysis. A close relationship was observed, for both normal and scoliotic subjects, between the anatomical parameter of pelvic incidence and the sacral slope, which strongly determines lumbar lordosis. Taking into account the Cobb angle and the apical vertebral rotation confers a three-dimensional aspect to this chain of relations between pelvis and spine. A predictive equation of lordosis is postulated. The pelvic incidence appears to be the main axis of the sagittal balance of the spine. It controls spinal curves in accordance with the adaptability of the other parameters.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/s005860050038

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Optimization of the isocratic non-aqueous reverse phase (NARP) HPLC separation of trans/cis-α-and β-carotenes (1989)

Lesellier, E. ; Marty, C. ; Berset, C. ; [et al.]

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 12 (1989), S. 447-454

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ISSN: 0935-6304

Keywords: Reverse phase chromatography, RP-HPLC ; Optimization ; Polymeric phase ; Dehydrated carrots ; Isomeric carotenes ; Chemistry ; Analytical Chemistry and Spectroscopy

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Non-aqueous reverse phase chromatography was used to optimize the separation of all-trans-α- and β-carotenes and their cis isomers extracted from dried carrots. The technique can easily be applied to routine assays. Optimization was carried out by modifying the concentrations of methylene chloride and acetonitrile, and by studying the influence of temperature on the capacity factors and selectivity. The effect of the type of C 18 stationary phase bonding (mono- and polyfunctional) on separation was also examined. The need for polymeric bonding on the stationary phase is stressed for the realization of the trans/cis isomer separation.

Additional Material: 9 Ill.