Search results for "Open"
showing 10 items of 3963 documents
Empirical Verification of the Relationship Between Personality Traits and EFL Attainments
2023
Although the study of personality is one of the major themes in psychology, its role in the second language acquisition (SLA) process has not been unanimously acknowledged. The overall scarcity and obscurity of research outcomes can be attributed to methodological problems and lack of firm grounding in the vast field of personality theories. Moreover, it appears that personality may not exact an easily observable, direct effect on L2 behaviours and success. This paper is an attempt to broaden the understanding of the role of personality in the SLA field. Its main aim is to establish the predictive value of the personality dimensions (Neuroticism, Extraversion, Openness to experience, Agreea…
Political Philosophy and Anthropological Pessimism: Notes on Arthur Schopenhauer’s Political Philosophy
2014
en este artículo presento la relación entre la filosofía política y la antropología filosófica en la obra de Arthur Schopenhauer. en primer lugar, abordo brevemente lo que se puede denominar el pesimismo antropológico schopenhaueriano, visión negativa de la humanidad que marca su filosofía política, centrada sobre todo en la crítica del egoísmo. Para ello, me detengo en uno de los baluartes contra este egoísmo, es decir, el estado, que para Schopenhauer es una institución dedicada a la protección de los individuos, por lo que se puede vincular con las tradiciones del liberalismo y el contractualismo modernos. en este punto, introduzco la cuestión de la forma de gobierno defendida por Schope…
The role of different oxides as supports of an heteropolyacid in the catalytic and catalytic photo-assisted propene hydration
2013
Child-Pugh Class and Not Thrombocytopenia Impacts the Risk of Complications of Endoscopic Band Ligation in Patients with Cirrhosis and High Risk Vari…
2023
Background and Aims: Endoscopic band legation (EBL) is an effective method for the prophylaxis of acute variceal bleeding (AVB). This procedure may be associated with several complications, particularly bleeding. Our analysis aimed to evaluate the risk of complications due to EBL in a cohort of patients who underwent EBL for the prophylaxis of variceal bleeding and the eventual presence of risk predictors. Patients and Methods: We retrospectively analysed data from consecutive patients who underwent EBL in a primary prophylaxis regimen. For all patients, simultaneously with EBL, we recorded the Child–Pugh and MELD score, platelet count and US features of portal hypertension. Results: We col…
Facile and efficient chemical functionalization of aliphatic polyesters by cross metathesis
2016
International audience; An effective preparation of new tailor-made macromolecular materials via a combination of two (atom-efficient) catalytic transformations is reported. First, new aliphatic polyesters with alternated composition have been prepared using a salen aluminum catalyst system. Next, the pendant vinyl moieties in those copolymers have been selectively transformed into various functional groups by metathesis in the presence of homogeneous Grubbs catalysts. The latter metathesis reaction has been optimized in terms of catalytic activity and selectivity, to define the conditions for an effective and safe procedure that does not affect the macromolecular architecture. All polymer …
Silseskwioksany i ich zastosowanie w syntezie materiałów polimerowych
2015
Artykuł stanowi przegląd literatury dotyczącej syntezy oraz charakterystyki materiałów polimerowych zawierających silseskwioksany (POSS). Przedstawiono metody otrzymywania hybrydowych materiałów polimerowych z udziałem funkcjonalizowanych POSS na drodze click chemistry, polikondensacji, poliaddycji, metatezy z otwarciem pierścienia ipolimeryzacji rodnikowej zarówno konwencjonalnej, jak i kontrolowanej (ATRP).
H3PW12O40 SUPPORTED ON DIFFERENT OXIDES: INFLUENCE OF THE SUPPORT ON THE CATALYTIC AND CATALYTIC PHOTO-ASSISTED PROPENE HYDRATION
2012
Polysarcosine-Based Lipids: From Lipopolypeptoid Micelles to Stealth-Like Lipids in Langmuir Blodgett Monolayers.
2016
Amphiphiles and, in particular, PEGylated lipids or alkyl ethers represent an important class of non-ionic surfactants and have become key ingredients for long-circulating (“stealth”) liposomes. While poly-(ethylene glycol) (PEG) can be considered the gold standard for stealth-like materials, it is known to be neither a bio-based nor biodegradable material. In contrast to PEG, polysarcosine (PSar) is based on the endogenous amino acid sarcosine (N-methylated glycine), but has also demonstrated stealth-like properties in vitro, as well as in vivo. In this respect, we report on the synthesis and characterization of polysarcosine based lipids with C14 and C18 hydrocarbon chains and their end g…
Inside Cover: Hydrogen-Bonded Open-Framework with Pyridyl-Decorated Channels: Straightforward Preparation and Insight into Its Affinity for Acidic Mo…
2017
International audience; A hydrogen-bonded open framework with pores decorated by pyridyl groups was constructed by off-charge-stoichiometry assembly of protonated tetrakis(4-pyridyloxymethyl)methane and [Al(oxalate)(3)](3-), which are the H-bond donor and acceptor of ionic H-bond interactions, respectively. This supramolecular porous architecture (SPA-2) has 1nm-large pores interconnected in 3D with large solvent-accessible void (53%). It demonstrated remarkable affinity for acidic organic molecules in solution, which was investigated by means of various carboxylic acids including larger drug molecules. Competing sorption between acetic acid and its halogenated homologues evidenced good sel…