8 research outputs found
Thermal stability of N-(a ±-amino-dodecyl)-benzotriazole
Get PDFN-(α-amino-alkyl)-benzotriazole, a derivative of Benzotriazole (BTZ), was synthesized via a Mannich reaction addition. The chemical characterization shows that when C19H32N4supramolecule is subjected to heating process the covalent bonds of aminal carbon are broken, modifying supramolecule structure, this results in a rearrangement to the structure dodecan ammonium-1-benzotriazol-1-ate, [BTZ- amine12+].Quantum chemical calculations based on DFT method were performed on the C19H32N4 molecule. The results show that in a derivative of BTZ exists a weak bond where its break may occur
Self-Organization Process of Ordered Structures in Linear and Star Poly(styrene)−Poly(isoprene) Block Copolymers: Gaussian Models and Mesoscopic Parameters of Polymeric Systems
No full textPerforación de colon sigmoides por espina de pescado: tratamiento combinado laparoscópico y endoscópico
No full textLa ingestión accidental de cuerpos extraños, más frecuentemente espinas de pescado, causa perforaciones intestinales
en menos del 1 % de los casos; la alta morbimortalidad asociada con estas ha favorecido la búsqueda de
alternativas frente a la cirugía convencional.
El caso presentado muestra cómo el abordaje combinado secuencial laparoscópico y endoscópico, permite resolver
con menor grado de agresión una perforación sigmoidea por cuerpo extraño
