Structural chemistry and thermal properties of some pyrimidine complexes

297-303A few complexes of Fe(III), Co(II), Ni (II) and Cu(II) with uracil, 6-amino uracil , and those with substituted phenylazo-6-amino uracils containing o-methyl, <i style="mso-bidi-font-style: normal">p-carboxy and o-carboxy substituents and 5,5'-diethyl barbituric acid sodium salt have been synthesized and characterized by elemental analysis, magnetic moment and spectral measurements (IR, Uv-vis, ESR). The IR spectra show that uracil exists in keto- enol tautomerism but 6-amino uracil possesses the keto amino-imine structure with some enol form. The iron complexes are with O<i style="mso-bidi-font-style: normal">h geometry, while the cobalt complexes are with different geometries (square planar and Oh). The square planar copper complexes exist in ligand bridged structures. The nickel complexes are of tetrahedral configuration. In general, the azo group is involved in the structural chemistry of the azo complexes. The coordination bond length has been calculated. The thermal properties (TG and DTA) of the compounds and their complexes are measured and discussed and also the thermodynamic parameters are evaluated

Reliability and Safety of Cross-Leg Free Latissmus Dorsi Muscle Flap in Reconstruction of Mutilating Leg Injuries Using End-to-Side Anastomosis

Background Free tissue transfer is considered the gold standard option for the reconstruction of distal leg defects. Free tissue transfer using recipient vessels in the contralateral leg (cross-leg bridge) is a potential option to supply the flap if there are no suitable recipient vessels in the injured leg. Most studies have described this technique using end-to-end anastomosis which sacrifices the main vessel in the uninjured leg. This study evaluated the use of a cross-leg free latissimus dorsi muscle flap for the reconstruction of defects in single-vessel legs, using end-to-side anastomosis to recipient vessels in the contralateral leg without sacrificing any vessel in the uninjured leg