810 research outputs found
SÃndrome de burnout e satisfação no trabalho: diferença entre trabalhadores da saúde brasileiros e portugueses
Effect of coordinating solvents on the structure of Cu(II)-4,4'-bipyridine coordination polymers
Solvent can play a crucial role in the synthesis of coordination polymers (CPs). Here, this study reports how the coordinating solvent approach (CSA) can be used as an effective tool to control the nature of the final CP. This study exploited the system Cu(II)-4,4 '-bipyridine coupled to different coordinating solvents, such as DMA, DMF and DMSO. This allowed the isolation and structurally characterization of four new CPs: three 2D layered networks and one 1D chain. Moreover, it was evidenced that even adventitious water can play the role of the coordinating solvent in the final CP
Relação entre nÃvel geral de saúde, dor musculoesquelética e sÃndrome de burnout em professores universitários
Burnout e satisfação profissional nos profissionais de saúde: um estudo comparativo entre Portugal e Brasil
TIMING OF GLYCEROL ADDITION ON SPERM QUALITY IN CRYOPRESERVATION OF CANINE SEMEN
El objetivo del presente trabajo fue evaluar el efecto del momento de adición del glicerol durante el proceso de enfriamiento sobre la calidad espermática del semen canino. Se utilizaron 15 eyaculados de 4 perros adultos. Cada muestra de semen fue dividida en alÃcuotas para someterlas a tres métodos de adición de glicerol (T1: al inicio; T2: al inicio y final; T3: al final de la curva de enfriamiento). El semen se envasó en pajillas de 0.5 ml y se congeló en nitrógeno lÃquido. Se evaluó la motilidad progresiva y la integridad funcional de membrana posdescongelamiento. No se encontró diferencia estadÃstica entre los tres métodos de adición del glicerol, pudiéndose simplificar el proceso de criopreservación al añadir todo el glicerol al inicio de la curva de enfriamiento.The objective of the study was to evaluate the timing of adding glycerol during thecooling process on sperm quality of canine semen. Fifteen ejaculates from 4 mature dogswere used. Each sample was divided in aliquots and three methods of adding glycerolwere used (T1: at the beginning; T2; at the beginning and at the end; T3: at the end of thecooling process). Semen samples were packed in 0.5 ml straws and frozen in liquid nitrogen.The post-thawing progressive motility and the functional integrity of membrane wereevaluated. None statistical difference was observed due to the three treatments, indicatingthat the process of cryopreservation can be simplified by adding all the glycerol at thebeginning of the cooling curve
Amorphous WO3 as transparent conductive oxide in the near-IR
The demand for transparent conductive films (TCFs) is dramatically increasing. In this work tungsten oxide (WO3-x) is studied as a possible option additional to the existed TCFs. We introduce WO3-x thin films fabricated by a non-reactive magnetron RF-sputtering process at room temperature, followed by thermal annealing in dry air. Films are characterized morphologically, structurally, electrically, optically, and dielectrically. Amorphous WO3-x thin films are shown to be ntype conductive while the transparency extends to the near-IR. By evaluating a figure of merit for transparent-conductive performance and comparing to some most-widely used TCFs, WO3-x turns out to outperform in the near-IR optical range
Ferrous to Ferric Transition in Fe-Phthalocyanine Driven by NO2 Exposure
Due to its unique magnetic properties offered by the open-shell electronic structure of the central metal ion, and for being an effective catalyst in a wide variety of reactions, iron phthalocyanine has drawn significant interest from the scientific community. Nevertheless, upon surface deposition, the magnetic properties of the molecular layer can be significantly affected by the coupling occurring at the interface, and the more reactive the surface, the stronger is the impact on the spin state. Here, we show that on Cu(100), indeed, the strong hybridization between the Fe d-states of FePc and the sp-band of the copper substrate modifies the charge distribution in the molecule, significantly influencing the magnetic properties of the iron ion. The FeII ion is stabilized in the low singlet spin state (S=0), leading to the complete quenching of the molecule magnetic moment. By exploiting the FePc/Cu(100) interface, we demonstrate that NO2 dissociation can be used to gradually change the magnetic properties of the iron ion, by trimming the gas dosage. For lower doses, the FePc film is decoupled from the copper substrate, restoring the gas phase triplet spin state (S=1). A higher dose induces the transition from ferrous to ferric phthalocyanine, in its intermediate spin state, with enhanced magnetic moment due to the interaction with the atomic ligands. Remarkably, in this way, three different spin configurations have been observed within the same metalorganic/metal interface by exposing it to different doses of NO2 at room temperature
Current trends on subtotal petrosectomy with cochlear implantation in recalcitrant chronic middle ear disorders Attualità in tema di petrosectomia subtotale con impianto cocleare nelle patologie croniche dellorecchio medio recalcitranti
Obiettivo. Stabilire la sicurezza ed efficacia dell’intervento di petrosectomia subtotale con
posizionamento di impianto cocleare nei pazienti affetti da patologia cronica dell’orecchio
medio refrattaria a precedenti trattamenti chirurgici.
Metodi. È stato svolto uno studio retrospettivo multicentrico riguardante quei pazienti af-
fetti da patologie croniche dell’orecchio medio recalcitranti, sottoposti a petrosectomia
subtotale con posizionamento di impianto cocleare. Le informazioni sono state raccolte dai database di 11 centri di riferimento di III livello in
Italia. A complemento, è stata svolta una revisione della più recente letteratura.
Risultati. Nello studio sono stati inclusi 55 pazienti con un follow-up medio di 44 mesi. Il colesteatoma ha rappresentato la più comune pato-
logia ricorrente dell’orecchio medio e il 50,9% dei pazienti aveva una cavità aperta. L’80% dei pazienti è stato sottoposto ad una chirurgia a
singolo stadio. Sette pazienti hanno mostrato complicanze post-operatorie, di cui un caso di espianto.
Conclusioni. L’intervento di petrosectomia subtotale con posizionamento di impianto cocleare rappresenta una tecnica chirurgica di riferimento per la gestione dei pazienti affetti da otite media cronica recalcitrante. L’intervento chirurgico a singolo stadio è la strategia più
frequentemente raccomandata. Il follow-up ottimale è ancora ad oggi oggetto di dibattito. Sono richiesti ulteriori studi per stabilire il ruolo di questo intervento nei pazienti pediatrici.Objective. To establish the safety and effectiveness of subtotal petrosectomy with cochlear implantation in patients affected by chronic middle ear disorders to refractory to previous surgical treatments. Methods. A multicentre, retrospective study was conducted on patients affected by recalcitrant chronic middle ear disorders who underwent cochlear implantation in combination with subtotal petrosectomy. Patients’ details were collected from databases of 11 Italian tertiary referral centres. Additionally, a review of the most updated literature was carried out. Results. 55 patients were included with a mean follow-up time of 44 months. Cholesteatoma was the most common middle ear recurrent pathology and 50.9% of patients had an open cavity. 80% of patients underwent a single stage surgery. One case of explantation for device failure was reported among the 7 patients with post-operative complications. Conclusions. Subtotal petrosectomy with cochlear implantation is a benchmark for management of patients with recalcitrant chronic middle ear disorders. A single stage procedure is the most recommended strategy. Optimal follow-up is still debated. Further studies are required to investigate the role of this surgery in paediatric patients
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