Bone tunnel impaction reduced the tibial tunnel enlargement

The purpose of this study was to investigate whether the bone tunnel impaction technique performed by dilators could dwindle the tibial tunnel enlargement after anterior cruciate ligament (ACL) reconstruction with hamstring tendon using both extracortical suspensory fixation devices at femoral and tibial site

Synthesis of New Bis(3-hydroxy-4-pyridinone) Ligands as Chelating Agents for Uranyl Complexation

Five new bis(3-hydroxy-4-pyridinone) tetradentate chelators were synthesized in this study. The structures of these tetradentate chelators were characterized by 1H-NMR, 13C-NMR, FT-IR, UV-vis, and mass spectral analyses. The binding abilities of these tetradentate chelators for uranyl ion at pH 7.4 were also determined by UV spectrophotometry in aqueous media. Results showed that the efficiencies of these chelating agents are dependent on the linker length. Ligand 4b is the best chelator and suitable for further studies

Synthesis and Characterization of [60]Fullerene-Poly(glycidyl nitrate) and Its Thermal Decomposition

A new energetic fullerene derivative [60]­fullerene-poly­(glycidyl nitrate) (C₆₀-PGN) was synthesized through a modified Bingel reaction of C₆₀ and bromomalonic acid PGN ester in the presence of amino acid and dimethyl sulfoxide. The obtained product was characterized by nuclear magnetic resonance, Fourier transform infrared spectroscopy, and ultraviolet–visible spectroscopy. Results confirmed that C₆₀-PGN was synthesized successfully. The thermal decomposition analysis of C₆₀-PGN was investigated by differential scanning calorimetry and thermogravimetric analysis with infrared spectroscopy, which revealed that C₆₀-PGN exhibits good resistance to thermal decomposition up to 200 °C. The kinetic parameters of the thermal decomposition of C₆₀-PGN were also obtained from the differential thermal analysis data by Kissinger and Ozawa–Doyle methods, with <i>E</i>_a = 170.85 and 168.29 kJ·mol^–1, respectively. C₆₀-PGN exhibits stability higher than that of any other known polynitrofullerenes