ABSTRACT
The finite temperature spin and orbital magnetism of N≤ 10 Fe(N) linear chains is theoretically studied in the framework of a spin fluctuation theory based on a realistic d-band model Hamiltonian, which includes the spin-orbit coupling interaction in a non-perturbative way. Spin and orbital magnetic moments are calculated as a function of the temperature by using an exchange Monte Carlo method that takes into account in a full way the short-range magnetic order. The finite temperature anisotropy effects on the spin and orbital cluster moment values are analysed by considering magnetization directions perpendicular to and along the chain axis. The temperature dependence of the orbital cluster moment follows a general trend similar to that of the spin one and shows clear anisotropy effects at low and intermediate temperatures, before total thermal disorder appears. Interesting anisotropy effects driven by thermal spin fluctuations are also observed for the spin results in most of the systems.
ABSTRACT
La lesión digestiva aguda por caústicos es una patología que con cierta frecuencia se observa como motivo de consulta a los servicios de urgencias. Tiene un pronóstico reservado dada la cantidad de complicaciones quirúrgicas, médicas e infecciosas a las que están expuestos estos pacientes. Las secuelas que el paciente debe enfrentar en diferentes etapas de su evolución requieren de cuidados intensivos durante un tiempo prolongado además de muchos controles posteriores al alta para evaluar y tratar proiblemas de consideración, estenosis y otras lesiones faringo-esofágicas. Presentamos el caso de un adulto masculino que debido a un síndrome depresivo mayor cursa un intento suicida ingiriendo ácido muriático por boca con severa lesiones digestivas muy poco sintomáticas durante su evolución precoz, pero con un resultado fatal debido a sangrado digestivo agudo masivo.
The acute gastrointestinal injury by caustics is a condition that frequently is observed as a cause of consultations to emergency department. These patients have reserved prognosis given the number of surgical complications, medical and infections. The aftermath that the patient must face at different stages of their development require intensive care for a long time and post-discharge many patients required assess and treat problems, primarily stenosis and other injuries pharynx-esophageal. We report the case of an adult male with depressive syndrome and by suicide attempt with ingesting muriatic acid by mouth, he developed very little injuries digestive during his early trends, but with a fatal outcome due to acute massive gastrointestinal bleeding.
Subject(s)
Humans , Male , Adult , Hydrochloric Acid/adverse effects , Upper Gastrointestinal Tract/injuries , Caustics/adverse effects , Suicide, AttemptedABSTRACT
No disponible
Subject(s)
Humans , Homosexuality/psychology , Clinical Trials as Topic , Epidemiologic Studies , Mental Disorders/complications , Mental Disorders/diagnosis , Mental Disorders/epidemiology , Prevalence , PsychopathologyABSTRACT
This paper describes the synthesis of a series of azo compounds able to deliver 5-aminosalicylic acid (5-ASA) and a potent platelet activating factor (PAF) antagonist in a colon-specific manner for the purpose of treating ulcerative colitis. We found it possible to add an amino group on the aromatic moiety of our reported 1-[(1-acyl-4-piperidyl)methyl]-1H-2-methylimidazo[4,5-c]pyridine derivatives or on British Biotech compounds BB-882 and BB-823 maintaining a high level of activity as PAF antagonist. A selected compound UR-12715 (49c) showed an IC(50) of 8 nM in the in vitro PAF-induced aggregation assay, and an ID(50) of 29 microg/kg in the in vivo PAF-induced hypotension test in normotensive rats. Through attachment of 49c to the 5-ASA via azo functionality we obtained UR-12746 (70). Pharmacokinetics experiments with [14C]-70 allow us to reach the following conclusions, critical in the design of these new prodrugs of 5-ASA. Neither the whole molecule 70 nor the carrier 49c were absorbed after oral administration of [14C]-70 in rat as was demonstrated by the absence of plasma levels of radioactivity and the high recovery of it in feces. Effective cleavage of azo bond (84%) by microflora in the colon is achieved. These facts ensure high topical concentrations of 5-ASA and 49c in the colon. Additionally, 70 exhibited a potent anticolitic effect in the trinitrobenzenesulfonic acid-induced colitis model in the rat. This profile suggests that UR-12746 (70) provides an attractive new approach to the treatment of ulcerative colitis.
