Search results for "LI-"
showing 10 items of 269 documents
Enriching gender in physics education research: A binary past and a complex future
2016
[This paper is part of the Focused Collection on Gender in Physics.] In this article, we draw on previous reports from physics, science education, and women’s studies to propose a more nuanced treatment of gender in physics education research (PER). A growing body of PER examines gender differences in participation, performance, and attitudes toward physics. We have three critiques of this work: (i) it does not question whether the achievements of men are the most appropriate standard, (ii) individual experiences and student identities are undervalued, and (iii) the binary model of gender is not questioned. Driven by these critiques, we propose a conception of gender that is more up to date…
The ins and outs of cholesterol in the vertebrate retina
2010
Thematic Review Series: Lipids and Lipid Metabolism in the Eye; International audience; The vertebrate retina has multiple demands for utilization of cholesterol and must meet those demands either by synthesizing its own supply of cholesterol or by importing cholesterol from extraretinal sources, or both. Unlike the blood-brain barrier, the blood-retina barrier allows uptake of cholesterol from the circulation via a lipoprotein-based/receptor-mediated mechanism. Under normal conditions, cholesterol homeostasis is tightly regulated; also, cholesterol exists in the neural retina overwhelmingly in unesterified form, and sterol intermediates are present in minimal to negligible quantities. Howe…
From Knowledge to Action, Analysis of the Decision Making Process in Africa : the Case of the State Contract Teacher Policy
2011
Policy analysis in Africa has mainly focused on their evaluation. Now that several reforms are undertaken and that the progressive move toward democracy allows new actors to enter the political arena, it is useful to analyze how decisions on public issues are made. The dissertation examines the reform of the teacher recruitment policy in francophone Africa. The reform consisted in changing the teacher status in order to allow the government to pay a lower salary to new teachers. The drawbacks of the usual policy and research from the area of economics of education demonstrating that the reform was necessary put the issue on the agenda. If many countries adopted it, some have not. Factors th…
Guidelines and Current Assessment of Health Care Responsibility in Italy
2020
Stefania Zerbo, Ginevra Malta, Antonina Argo Department of Health Promotion, Maternal and Child Care, “G. D’Alessandro”, Legal Medicine Section, University of Palermo, Palermo, ItalyCorrespondence: Stefania ZerboDepartment of Health Promotion, Maternal and Child Care, “G. D’Alessandro”, Legal Medicine Section, University of Palermo, via del Vespro N. 129, Palermo 90127, ItalyTel +39 33 3725 0209Fax +39 09 1655 3203Email stefania.zerbo@unipa.itAbstract: Clinical guidelines are a potential tool for improving the effectiveness and quality of healthcare, decreasing variability in clinical practice, and preventing adverse events. In the…
Development of stimulus-sensitive electrospun membranes based on novel biodegradable segmented polyurethane as triggered delivery system for doxorubi…
2022
In this work, redox-sensitive polyurethane urea (PUU) based electrospun membranes have been exploited to chemically tether a pH-sensitive doxorubicin derivative achieved by linking a lipoyl hydrazide to the drug via a hydrazone linkage. First, the lipoyl-hydrazone-doxorubicin derivative labelled as LA-Hy-Doxo has been syn- thesized and characterized. Then, the molecule has been tethered, via a thiol-disulfide exchange reaction, to the redox-sensitive PUU (PolyCEGS) electrospun membrane. The redox-sensitive PolyCEGS PUU has been produced by using PCL-PEG-PCL polyol and glutathione-tetramethyl ester (GSSG-OMe)4 as a chain extender. The LA-Hy- Doxo tethered electrospun membrane has showed a du…
NANOSTRUCTURED ANODE MATERIAL FOR Li-ION BATTERY OBTAINED BY GALVANIC PROCESS
2016
The accumulation of energy by batteries plays a fundamental role for the production of electrical energy and for its efficient management. Between different storage systems the lithium-ion battery are considered very interesting. Although they are now a well-established commercial reality, they are still subject of vigorous research efforts, in order to make improvements primarily in terms of costs, safety and energy density. The latter is in fact still low compared to that of fossil fuels, if you think to the automotive field. In particular efforts are focused towards the identification of valid alternatives to the electrode materials so as to overcome the limitations and extend the use of…
Metodo Per l’Accrescimento di Nanostrutture in Silicio E Dispositivo Elettrico Comprendente Tali Nanostrutture
2013
I REQUISITI FORMALI EX ART. 4 L. N. 91/1981 NEL PRISMA DELL’INDEROGABILITÀ DELLA DISCIPLINA DEL DIRITTO DEL LAVORO
2009
Questo contributo analizza il tipo di invalidità che colpisce il contratto di lavoro sportivo qualora non siano rispettati i requisiti formali ex lege n. 91/1981 relativi al deposito del contratto presso la Federazione competente e alla conformità al contratto tipo