Search results for "MERIS"
showing 10 items of 924 documents
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 …
Microchimerism in multiple sclerosis: The association between sex of offspring and MRI features in women with multiple sclerosis
2023
AimsDuring pregnancy, fetal cells can migrate to the mother via blood circulation. A percentage of these cells survive in maternal tissues for decades generating a population of fetal microchimeric cells (fMCs), whose biological role is unclear. The aim of this study was to investigate the association between the sex of offspring, an indirect marker of fMCs, and magnetic resonance imaging (MRI) features in women with multiple sclerosis (MS).MethodsWe recruited 26 nulliparous MS patients (NPp), 20 patients with at least one male son (XYp), and 8 patients with only daughters (XXp). Each patient underwent brain MR scan to acquire 3D-T2w FLAIR FatSat and 3D-T1w FSPGR/TFE. Lesion Segmentation To…
Microchimerism and multiple sclerosis: a study on the impact of the sex of offspring on clinical, radiological, and paraclinical features of maternal…
2023
Background. Multiple sclerosis (MS) is a chronic autoimmune disorder characterised by inflammation and neurodegeneration and representing one of the most common causes of neurologic disability among young adults. Over the last 40 years, several authors have confirmed the existence of fetal cells in maternal blood and their pregnancy-related origin, demonstrating that pregnancy may establish a long-term, low-grade chimeric state in women. The biological and clinical significance of fetal microchimeric cells (fMCs) in maternal health is largely unknown, although a role in autoimmune diseases have been hypothesised. Aims. The overarching aim of my PhD dissertation was to investigate the role o…
Functional molecular materials: supramolecular networks and coordination polymers with optical and/or magnetic properties
2020
El camp dels materials moleculars atrau l’atenció de molts científics degut al gran potencial de la química molecular en el disseny de materials amb un ajust precís de les seues propietats. Els dos projectes tractats en aquesta tesi representen dos temes que destaquen en aquesta àrea, materials de transició d’espín i polímers de coordinació amb propietats òptiques i/o magnètiques, gràcies al seu significant progrés i ràpid desenvolupament en els últims anys. La primera part d’aquesta tesi es basa en l’ús d’enllaços d’hidrogen en el disseny de xarxes multifuncionals de ferro(II) amb transicions d’espín abruptes. El capítol 1 és una introducció a aquest tema des de la perspectiva dels complex…
A Critical Review of Relations between Corporate Responsibility Research and Practice
2007
This essay identifies epistemological, theoretical and methodological problems in a potentially influential subset of the interdisciplinary corporate responsibility literature, that which appears in the management literature. The received conceptualization of stakeholder analysis is criticised by identifying six sets of factors conventionally considered as promoting social responsibilities in the firm: inter-organizational factors, economic competitors, institutional investors, end-consumers, government regulators and non-governmental organizations. Each is addressed on conceptual grounds, its empirical salience in terms of the latest relevant research and prospects to be a significant fact…
Editorial: From Meristems to Floral Diversity: Developmental Options and Constraints
2021
Brevi note in tema di applicabilità della normativa sul contratto di consumo al mandato tra agente sportivo e assistito
2020
L’avvio innanzi al Collegio di Garanzia dello Sport delle procedure arbitrali relative alle controversie nascenti in dipendenza dei contratti di mandato tra agenti sportivi ed assistiti, per effetto della recente emanazione del Regolamento CONI in materia, ai sensi dell’art. 22, comma 2, del Regolamento Agenti Sportivi, ha riproposto all’attenzione degli interpreti la questione della assoggettabilità degli agenti alla normativa federale e, in specie, al vincolo di giustizia sportiva. La questione viene affrontata nel presente lavoro sotto lo specifico angolo visuale afferente alla possibilità o meno di considerare la clausola compromissoria, inserita nei contratti di mandato tra agenti spor…
Experimental and Theoretical Investigations of Structural Isomers of Dichalcogenoimidodiphosphinate Dimers: Dichalcogenides or Spirocyclic Contact Io…
2007
A synthetic protocol for the tert-butyl-substituted dichalcogenoimidodiphosphinates [Na(tmeda){(EPtBu2)2N}] (3 a, E=S; 3 b, E=Se; 3 c, E=Te) has been developed. The one-electron oxidation of the sodium complexes [Na(tmeda){(EPR2)2N}] with iodine produces a series of neutral dimers (EPR2NPR2E[BOND])2 (4 b, E=Se, R=iPr; 4 c, E=Te, R=iPr; 5 a, E=S, R=tBu; 5 b, E=Se, R=tBu; 5 c, E=Te, R=tBu). Attempts to prepare 4 a (E=S, R=iPr) in a similar manner produced a mixture including HN(SPiPr2). Compounds 4 b, 4 c and 5 a–c were characterised by multinuclear NMR spectra and by X-ray crystallography, which revealed two alternative structures for these dimeric molecules. The derivatives 4 b, 4 c, 5 a an…
Erikoisruokasuolojen analysointi ja kahden kristallisuola-alueen suolojen biosaatavuuden vertailu
2016
Tämä Pro gradu -tutkielma koostuu kirjallisuuskatsauksesta ja suoritetun erikoistyön selostuksesta. Puhdistamattoman vuorisuolan, jota kutsutaan myös kristallisuolaksi tai Ruususuolaksi, käyttö on lisääntynyt runsaasti viime vuosina. Käyttöä perustellaan sen sisältämillä monilla alkuaineilla, mutta analyyttisiä tutkimuksia eri aineiden pitoisuuksista löytyy kirjallisuudesta niukasti. Puhdistamaton suola voi myös sisältää erilaisia haitallisia ainesosia, joten niiden tutkiminen on erittäin tärkeää. Työn kirjallisessa osassa käytiin läpi kirjallisuutta ja julkaistuja artikkeleja siitä, miten suolanäytteitä on tutkittu, millä analyysimenetelmillä on mitäkin alkuaineita mitattu ja minkälaisia h…
ChemInform Abstract: Assignment of the Absolute Configuration and Total Synthesis of (+)-Caripyrin.
2015
The antifungal secondary metabolite (+)-caripyrin was studied by vibrational circular dichroism spectroscopy. Analysis of the recorded data, with the Boltzmann weighted-average of the spectra calculated at the B3LYP/6-311G(d,p) level of theory for all relevant conformers, unequivocally proved the (R,R)-configuration for the dextrorotatory natural product. Based on this finding, a short enantioselective synthesis of (+)-caripyrin was developed.