71 research outputs found
Nickel(II) complexes based on L-amino-acid-derived ligands: Synthesis, characterization and study of the role of the supramolecular structure in carbon dioxide capture
The formation of the symmetrical 3-carbonate-bridged self-assembled trinuclear NiII complex Na2{[Ni(LO)2(H2O)]3(3-CO3)} (LO is the carboxylate anion of a l-tyrosine derivative), involves atmospheric CO2 uptake. The asymmetric unit of the complex comprises an octahedral coordination for the NiII with two l-tyrosine-based ligands, a water molecule and one O atom of the carbonate bridge. The Ni3â3-CO3 core in this compound is the first reported of this kind according to the Cambridge Structural Database (CSD). The supramolecular structure is mainly sustained by hydrogen bonds developed by the phenolic functionality of the l-tyrosine moiety of one ligand and the carboxylate group of a neighbouring ligand. The crystal packing is then characterized by three interpenetrated supramolecular helices associated with a diastereoisomer of the type RsupP, which is essential for the assembly process. Magnetic susceptibility and magnetization data support weak ferromagnetic exchange interactions within the novel Ni3â3-CO3 core. The NiII complex obtained under the same synthetic conditions but using the analogous ligand derived from the amino acid l-phenylalanine instead of l-tyrosine gives rise to to a mononuclear octahedral system. The results obtained for the different complexes demonstrate the role of the supramolecular structure regarding the CO2 uptake property for these NiIIâamino-acid-based systems.Fil: Rivas Marquina, Andrea Paola. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Ciudad Universitaria. Instituto de QuĂmica, FĂsica de los Materiales, Medioambiente y EnergĂa. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de QuĂmica, FĂsica de los Materiales, Medioambiente y EnergĂa; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de QuĂmica InorgĂĄnica, AnalĂtica y QuĂmica FĂsica; ArgentinaFil: Movilla, Federico. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Ciudad Universitaria. Instituto de QuĂmica, FĂsica de los Materiales, Medioambiente y EnergĂa. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de QuĂmica, FĂsica de los Materiales, Medioambiente y EnergĂa; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de QuĂmica InorgĂĄnica, AnalĂtica y QuĂmica FĂsica; ArgentinaFil: Sanchez Montilva, Olga Carolina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de QuĂmica InorgĂĄnica, AnalĂtica y QuĂmica FĂsica; Argentina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Ciudad Universitaria. Instituto de QuĂmica, FĂsica de los Materiales, Medioambiente y EnergĂa. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de QuĂmica, FĂsica de los Materiales, Medioambiente y EnergĂa; ArgentinaFil: Rentschler, Eva. Universidad de Mainz; AlemaniaFil: Carrella, Luca. Universidad de Mainz; AlemaniaFil: AlborĂ©s, Pablo. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de QuĂmica InorgĂĄnica, AnalĂtica y QuĂmica FĂsica; Argentina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Ciudad Universitaria. Instituto de QuĂmica, FĂsica de los Materiales, Medioambiente y EnergĂa. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de QuĂmica, FĂsica de los Materiales, Medioambiente y EnergĂa; ArgentinaFil: Di Salvo, Florencia. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Ciudad Universitaria. Instituto de QuĂmica, FĂsica de los Materiales, Medioambiente y EnergĂa. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de QuĂmica, FĂsica de los Materiales, Medioambiente y EnergĂa; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de QuĂmica InorgĂĄnica, AnalĂtica y QuĂmica FĂsica; Argentin
The Grizzly, September 18, 2008
How Safe do You Feel?: Campus Discussion About Safety âą Jersey in July: Not Just Another Day at the Beach for Some âą Studies Suggest Nicotine Addiction Linked to Gene Mutation âą Harry Potter: The Boy Who Brought Lawsuits? âą Motion with Emotion: Professional Dancer Ruth Andrian Arrives at UC âą Ursinus Kicks Off This Year\u27s International Film Festival âą Opinions: Democrat\u27s Perspective on Potential VP Sarah Palin; Barack Obama: The Only Right Choice for U.S. President âą Volleyball Vamps Up for First Victorious Season in Years âą UC Field Hockey Prepares to Restore Remarkable Reputationhttps://digitalcommons.ursinus.edu/grizzlynews/1768/thumbnail.jp
The Grizzly, October 23, 2008
Professors\u27 Performance to Jazz Up Your Friday Night âą Cafe Nia Event Brings Spirit of Poetry to Homecoming âą Active Minds to Spread Mental Health Awareness at UC âą Safe to Use Internet to Play Doctor? âą UC Popularity Growing Steadily âą Stand Up: STAND Rallies Ursinus Students for Darfur âą Another Night of Artistry in Philadelphia âą Omega Chi Blood Drive Takes the UC Campus by Storm, Highest Turnout Yet âą Alpha Paintball Company: Fun for the Whole Family âą Assassins Players Still on the Lookout âą Opinions: GSA Members Call for Respect; Breakaway Presents Ten Minute Play Festival, Take Two âą Senior Spotlight: Lisa Clark, Senior Women\u27s Soccer Playerhttps://digitalcommons.ursinus.edu/grizzlynews/1772/thumbnail.jp
The Grizzly, November 20, 2008
Adding Machine Makes Explosive Debut on UC Campus âą Active Minds Encourages Students to Relax: Stop Stressing! âą Creative Writing Author John Holman Visits UC Students âą Is the Economy Affecting Your Waistline? âą More Bailout News: AIG âą Inside the Busy Life of Senior Laura Ng âą Plummer Speaks About Importance of Election âą Ottinger Fights Child Illiteracy in Cold âą Play n Trade: New Store for Gamers âą Letter to the Editor âą Sunny Review âą Dracula\u27s Ball Recap: Ideal Halloween Destination âą Hockey Prepares for On-Campus Nationals This Weekendhttps://digitalcommons.ursinus.edu/grizzlynews/1776/thumbnail.jp
Dense matter with eXTP
In this White Paper we present the potential of the Enhanced X-ray Timing and
Polarimetry (eXTP) mission for determining the nature of dense matter; neutron
star cores host an extreme density regime which cannot be replicated in a
terrestrial laboratory. The tightest statistical constraints on the dense
matter equation of state will come from pulse profile modelling of
accretion-powered pulsars, burst oscillation sources, and rotation-powered
pulsars. Additional constraints will derive from spin measurements, burst
spectra, and properties of the accretion flows in the vicinity of the neutron
star. Under development by an international Consortium led by the Institute of
High Energy Physics of the Chinese Academy of Science, the eXTP mission is
expected to be launched in the mid 2020s.Comment: Accepted for publication on Sci. China Phys. Mech. Astron. (2019
ASTRI Mini-Array Top Level Software Architecture
This document provides a comprehensive architectural overview of the ASTRI Mini-Array Software system (a.k.a MA Software or MA Software System), which manages observing projects, observation handling, array control and monitoring, data acquisition, archiving, processing and simulations of the Cherenkov and Intensity Interferometry observations, including science tools for the scientific exploitation of the ASTRI MA data. This document, using a number of different views, depicts different aspects of the Mini-Array software and describes the significant architectural decisions
(Re)visitando a la madre (des)naturalizada : bĂșsquedas y encuentros entre personas adoptadas en Chile y sus madres de origen
Este artĂculo es resultado de los proyectos FONDECYT N°3170338 "Adopciones en Chile: la construcciĂłn de narrativas sobre los orĂgenes y la identidad", REDI170133 "InvestigaciĂłn Interdisciplinaria sobre PolĂticas Reproductivas y Parentales", Programa Coope-raciĂłn Internacional (PCI), ambos financiados por la ComisiĂłn Nacional de InvestigaciĂłn CientĂfica y TecnolĂłgica (CONICYT) de Chile; y del Proyecto I+D CSO2015-64551-C3-1-R "Del control de la natalidad a la ansiedad demogrĂĄfica: comunicaciĂłn, secreto y anonimato en las tecnologĂas reproductivas del siglo XXI", MINECO/FEDER.En este artĂculo se presentan algunos resultados de una investigaciĂłn cualitativa que explora y analiza las narrativas de un grupo de personas adultas que fueron adoptadas en Chile, que han buscado sus orĂgenes y que han establecido contacto con sus madres de origen. En sus narrativas, las personas entrevistadas adhieren, tensionan y/o desafĂan los principios y discursos que conforman las polĂticas y prĂĄcticas adoptivas hegemĂłnicas, resignificando de formas diversas su experiencia de adopciĂłn en el proceso de (re)construcciĂłn de sus identidades y de reorganizaciĂłn de sus relaciones de parentesco. Se discuten las tensiones y ambivalencias que se juegan en los procesos de bĂșsquedas de orĂgenes y los desafĂos asociados.This paper presents some results of a qualitative research that explores and analyzes the narratives of a group of adults who were adopted in Chile, and who have searched for their origins and made contact with their birth mothers. In their narratives, the people interviewed adhere to, strain, and/or challenge the principles and discourses that make up hegemonic adoption policies and practices, resignifying their experience of adoption in various ways, as they (re)build their identities and reorganize their kinship relationships. It discusses the tensions and ambivalences that play out in the search for origins and the challenges associated with it
Quality control of B-lines analysis in stress Echo 2020
Background
The effectiveness trial âStress echo (SE) 2020â evaluates novel applications of SE in and beyond coronary artery disease. The core protocol also includes 4-site simplified scan of B-lines by lung ultrasound, useful to assess pulmonary congestion.
Purpose
To provide web-based upstream quality control and harmonization of B-lines reading criteria.
Methods
60 readers (all previously accredited for regional wall motion, 53 B-lines naive) from 52 centers of 16 countries of SE 2020 network read a set of 20 lung ultrasound video-clips selected by the Pisa lab serving as reference standard, after taking an obligatory web-based learning 2-h module (
http://se2020.altervista.org
). Each test clip was scored for B-lines from 0 (black lung, A-lines, no B-lines) to 10 (white lung, coalescing B-lines). The diagnostic gold standard was the concordant assessment of two experienced readers of the Pisa lab. The answer of the reader was considered correct if concordant with reference standard reading ±1 (for instance, reference standard reading of 5 B-lines; correct answer 4, 5, or 6). The a priori determined pass threshold was 18/20 (â„ 90%) with R value (intra-class correlation coefficient) between reference standard and recruiting center)â>â0.90. Inter-observer agreement was assessed with intra-class correlation coefficient statistics.
Results
All 60 readers were successfully accredited: 26 (43%) on first, 24 (40%) on second, and 10 (17%) on third attempt. The average diagnostic accuracy of the 60 accredited readers was 95%, with R value of 0.95 compared to reference standard reading. The 53 B-lines naive scored similarly to the 7 B-lines expert on first attempt (90 versus 95%, pâ=âNS). Compared to the step-1 of quality control for regional wall motion abnormalities, the mean reading time per attempt was shorter (17â±â3 vs 29â±â12 min, pâ<â.01), the first attempt success rate was higher (43 vs 28%, pâ<â0.01), and the drop-out of readers smaller (0 vs 28%, pâ<â.01).
Conclusions
Web-based learning is highly effective for teaching and harmonizing B-lines reading. Echocardiographers without previous experience with B-lines learn quickly.info:eu-repo/semantics/publishedVersio
Goodbye Hartmann trial: a prospective, international, multicenter, observational study on the current use of a surgical procedure developed a century ago
Background: Literature suggests colonic resection and primary anastomosis (RPA) instead of Hartmann's procedure (HP) for the treatment of left-sided colonic emergencies. We aim to evaluate the surgical options globally used to treat patients with acute left-sided colonic emergencies and the factors that leading to the choice of treatment, comparing HP and RPA. Methods: This is a prospective, international, multicenter, observational study registered on ClinicalTrials.gov. A total 1215 patients with left-sided colonic emergencies who required surgery were included from 204 centers during the period of March 1, 2020, to May 31, 2020. with a 1-year follow-up. Results: 564 patients (43.1%) were females. The mean age was 65.9 ± 15.6 years. HP was performed in 697 (57.3%) patients and RPA in 384 (31.6%) cases. Complicated acute diverticulitis was the most common cause of left-sided colonic emergencies (40.2%), followed by colorectal malignancy (36.6%). Severe complications (Clavien-Dindo ℠3b) were higher in the HP group (P < 0.001). 30-day mortality was higher in HP patients (13.7%), especially in case of bowel perforation and diffused peritonitis. 1-year follow-up showed no differences on ostomy reversal rate between HP and RPA. (P = 0.127). A backward likelihood logistic regression model showed that RPA was preferred in younger patients, having low ASA score (†3), in case of large bowel obstruction, absence of colonic ischemia, longer time from admission to surgery, operating early at the day working hours, by a surgeon who performed more than 50 colorectal resections. Conclusions: After 100 years since the first Hartmann's procedure, HP remains the most common treatment for left-sided colorectal emergencies. Treatment's choice depends on patient characteristics, the time of surgery and the experience of the surgeon. RPA should be considered as the gold standard for surgery, with HP being an exception
La renovaciĂłn de la palabra en el bicentenario de la Argentina : los colores de la mirada lingĂŒĂstica
El libro reĂșne trabajos en los que se exponen resultados de investigaciones presentadas por investigadores de Argentina, Chile, Brasil, España, Italia y Alemania en el XII Congreso de la Sociedad Argentina de LingĂŒĂstica (SAL), Bicentenario: la renovaciĂłn de la palabra, realizado en Mendoza, Argentina, entre el 6 y el 9 de abril de 2010. Las temĂĄticas abordadas en los 167 capĂtulos muestran las grandes lĂneas de investigaciĂłn que se desarrollan fundamentalmente en nuestro paĂs, pero tambiĂ©n en los otros paĂses mencionados arriba, y señalan ademĂĄs las ĂĄreas que reciĂ©n se inician, con poca tradiciĂłn en nuestro paĂs y que deberĂan fomentarse. Los trabajos aquĂ publicados se enmarcan dentro de las siguientes disciplinas y/o campos de investigaciĂłn: FonologĂa, Sintaxis, SemĂĄntica y PragmĂĄtica, LingĂŒĂstica Cognitiva, AnĂĄlisis del Discurso, PsicolingĂŒĂstica, AdquisiciĂłn de la Lengua, SociolingĂŒĂstica y DialectologĂa, DidĂĄctica de la lengua, LingĂŒĂstica Aplicada, LingĂŒĂstica Computacional, Historia de la Lengua y la LingĂŒĂstica, Lenguas AborĂgenes, FilosofĂa del Lenguaje, LexicologĂa y TerminologĂa
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