Search results for "proPO"
showing 10 items of 1325 documents
The influence of aluminium cations on electrocarboxylation processes in undivided cells with Al sacrificial anodes
2005
Abstract The influence of Al cations on the electrochemical carboxylation of acenaphthylene ( 1 ), benzophenone ( 2 ), 6-methoxy-2-acetonaphthone ( 3 ), and benzyl chloride ( 4 ) has been investigated in dimethylformamide at a glassy carbon cathode. The Al 3+ ions were either added at the beginning of the experiment or were released from the anode during electrocarboxylation. It has been found that when Al cations are added to the reaction medium, they strongly influence the reduction process, in most cases leading to a complete change of the mechanism. For example, in the case of 1 , the radical anion ( 1 − ) formed upon 1e − reduction rapidly reacts with Al 3+ to give an Al(III) adduct, w…
Truth, Negation and Meaning
2013
‘True’ and ‘False’ are defined through a linguistic rule requiring the negation operator. This is the elaboration of an idea proffered for the first time by the Stoics on the basis of some remarks by Aristotle and then in modern times by Frege and Wittgenstein. Another thesis of this essay is the following: the true/false rule is a sort of UR-Regel underlying all linguistic practices (including prayers and commands) and all human cultures. Reinterpreting the notion of Spielraum put forward by Wittgenstein in 4.463 of the Tractatus, I will present an implicational pragmatic theory of a true proposition. Jokes and reductio ad absurdum are explained as examples of Spielraum.
Impact of clinical phenotypes on management and outcomes in European atrial fibrillation patients: a report from the ESC-EHRA EURObservational Resear…
2021
Abstract Background Epidemiological studies in atrial fibrillation (AF) illustrate that clinical complexity increase the risk of major adverse outcomes. We aimed to describe European AF patients’ clinical phenotypes and analyse the differential clinical course. Methods We performed a hierarchical cluster analysis based on Ward’s Method and Squared Euclidean Distance using 22 clinical binary variables, identifying the optimal number of clusters. We investigated differences in clinical management, use of healthcare resources and outcomes in a cohort of European AF patients from a Europe-wide observational registry. Results A total of 9363 were available for this analysis. We identified three …
Erratum to “Irregularity” [Topology Appl. 154 (8) (2007) 1565–1580]
2012
[2, Proposition 4.4] states that each regular pretopology is topologically regular. Professor F. Mynard (Georgia Southern University) advised the authors that he was not convinced by the proof of that proposition, which enabled us to realize the proposition is wrong, as the example below shows. Recall that (e.g., [2]) a pretopology ξ on a set X is called regular if Vξ (x)⊂ adh ξ Vξ (x) (respectively, topologically regular if Vξ (x)⊂ cl ξ Vξ (x)) for every x ∈ X . As a consequence, in the sequel of [2], regular should be read topologically regular in a few instances, in particular in [2, Theorem 4.6]. [2, Proposition 4.4] is also quoted in [3], where it is used in some reformulations of clas…
Rutas cognitivas de futuros maestros ante una situación comparativa de razones desiguales
2019
En esta investigación se analizan las rutas cognitivas que subyacen a las resoluciones de un grupo de futuros maestros ante una tarea de comparación de razones desiguales en el contexto de las ofertas comerciales. La revisión de la literatura y el análisis en profundidad de las componentes críticas de la tarea nos han permitido definir las dimensiones de análisis de las resoluciones. A partir de ellas hemos realizado un análisis cualitativo de corte interpretativo del cual se desprende que los participantes poseen un escaso desarrollo del pensamiento relativo. Un número importante de ellos presenta dificultades con la comparación de las cantidades relativas desiguales cuando estas se les pr…
Duties, Rules and Interpretations in Obligational Disputations
2001
An obligational disputation, as it was known in the Middle Ages, consisted basically of a sequence of propositions put forward by one person, called the opponent, and evaluated by another person, called the respondent. In the most typical variations of the technique, the sequence would begin with a special proposition, called the positum It was taken as the starting point, which the rest of the sequence would develop. The respondent had to accept the positum, if it was free from contradictions. Then he had to take into account in his later evaluations of the other propositions that he must at any time during the disputation grant the positum and anything following from it. The disputations …
Tumor response assessment by modified Choi criteria in localized high-risk soft tissue sarcoma treated with chemotherapy.
2012
BACKGROUND. The objective of this study was to compare the prognostic relevance of Response Evaluation Criteria in Solid Tumors (RECIST) versus Choi criteria for the assessment of response in patients with high-risk soft tissue sarcoma of the extremities or trunk wall who received preoperative chemotherapy with or without radiotherapy in a phase 3 trial. METHODS. Patients received 3 cycles of preoperative epirubicin þ ifosfamide with or without radiotherapy. The diagnostic concordance between RECIST and Choi criteria and their correlation with overall survival (OS) and freedom from progression (FFP) were evaluated in a univariate Cox regression model. RESULTS. In 243 of 321 eligible patient…
Iron deficiency and risk of early readmission following hospitalization for acute heart failure. Reply
2016
Aims Early rehospitalization after an episode of acute heart failure (AHF) remains excessively high and its prediction a contemporary challenge. Iron deficiency (ID) is a frequent finding in AHF, but its prognostic implications remain unclear. We sought to evaluate the association between ID and risk of 30-day readmission in an unselected cohort of patients discharged for AHF. Methods and results Serum ferritin and transferrin saturation (TSAT) were measured before discharge in 626 consecutive patients with AHF in a single teaching centre. ID was defined as serum ferritin 50%. ID was identified in 463 patients (74%): 302 (48.2%) as absolute ID and 161 (25.7%) as functional ID. At 30-day pos…
Safety and Effectiveness of Paclitaxel Drug-Coated Devices in Peripheral Artery Revascularization
2021
Abstract Background Paclitaxel drug-coated devices (DCDs) were developed to improve lower extremity revascularization (LER) patency in peripheral artery disease (PAD) but have been associated with long-term mortality. Objectives This study assessed DCD safety and effectiveness in LER for PAD. Methods VOYAGER PAD (Vascular Outcomes Study of ASA [acetylsalicylic acid] Along with Rivaroxaban in Endovascular or Surgical Limb Revascularization for PAD) randomized patients with PAD who underwent LER to rivaroxaban or placebo. The primary VOYAGER PAD study efficacy and safety outcomes were composite cardiovascular and limb events and Thrombolysis In Myocardial Infarction major bleeding. For prespe…
Evaluation of antibacterial efficacy of Chitosan, Chlorhexidine, Propolis and Sodium hypochlorite on Enterococcus faecalis biofilm : an in vitro study
2017
Background Long term successful root canal treatment requires effective debridement and disinfection of root canal system. Persistent periradicular lesions are usually associated with Enterococccus faecalis. Prompt research for natural alternatives for irrigation is mainly due to the constant increase in antibiotic resistant strains and side effects caused by synthetic drugs. Sodium hypochlorite; the gold standard for irrigation has many disadvantages. Therefore, the present study was aimed to explore newer irrigants probably be as more effective and at the same time would be less irritating to the tissues than NaOCl. Material and methods Ninety extracted human mandibular premolars were bio…