Burden and predictions of hospitalized injuries in a low-middle income country: results from a Tunisian university hospital.

Injuries are responsible for a high premature mortality and disability. They are poorly explored in low and middle income-countries. We aimed to estimate the burden of hospitalized injuries in the Monastir governorate (Tunisia) according to the nature of the injury, trends and projections of hospitalizations for injuries up until 2024, and to identify the distribution of this disease burden based on age and sex.

Ultraviolet Photoactivation Using Synchrotron Radiation for Tandem Mass Spectrometry of Polysiloxanes.

Gas-phase decompositions of polymer ions play an important role in mass spectrometry to obtain accurate structural information. In this work, UV photoactivation experiments were performed from two poly(dimethylsiloxane)s bearing different end groups (two trimethylsilyl, or α--butyl and ω- trimethylsilyl). Precursor ions, such as [Polysiloxane+Cation] produced by an electrospray source, were stored in a linear ion trap and then submitted to synchrotron UV irradiation during different activation times and over a range of wavelengths (52 to 248 nm) from extreme UV (XUV) to deep UV.

Synchrotron UV photoactivation of trapped sodiated ions produced from poly(ethylene glycol) by electrospray ionization.

Rationale: By taking advantage of the gas-phase decompositions of polymer ions, tandem mass spectrometry of polymers allows us to obtain more accurate structural information than from a simple mass measurement. Applied to a model polymer, the goal of this work was to evaluate the performances of an activation technique based on ultraviolet (UV) irradiation, as an alternative to conventional collisional activation.

Methods: Sodiated poly(ethylene glycol) produced by electrospray ionization was isolated in a linear ion trap, then submitted to synchrotron UV irradiation over a range of wavelengths (52 to 248 nm).

[Treatments associated with scarf osteotomy for hallux valgus correction].

In view of the multiplicity of the proposed techniques for hallux valgus correction, we recommend to evaluate scarf osteotomy associated or not with phalangeal osteotomy and/or Weil osteotomy. We conducted a retrospective study of 29 patients, including a bilateral case, undergoing scarf osteotomy of the first ray with associated treatments in 80% of cases between 2011 and 2016. Results were analyzed on the basis of patients' satisfaction, Groulier index and radiological measurements.

Study of the gas-phase decomposition of multiply lithiated polycaprolactone, polytetrahydrofurane and their copolymer by two different activation methods: Collision-induced dissociation and electron transfer dissociation.

Collision-Induced Dissociation and Electron Transfer Dissociation experiments were carried out from various lithium adducts ([M+2Li], [M+3Li]) from polycaprolactone diol (pCL), polytetrahydrofurane (pTHF), and one triblock copolymer (pCL-pTHF-pCL). In both cases (pCL and pTHF), CID of triply lithiated precursors led to complex mass spectra compared to corresponding ETD spectra, which remained relatively simple because CID product ions exhibit multiple charge states whereas ETD mainly led to singly charged fragment ions. CID of pCL involves charge-remote rearrangements over the ester groups and intramolecular transesterification reactions, whereas ETD leads to radical and charge induced cleavages leading globally to structurally different product ions but accounting for the same bond cleavages: (CO)O-C and (CO)-O respectively.