880 research outputs found
First person – Gonzalo Quiroga-Artigas
No full textInternational audienceFirst Person is a series of interviews with the first authors of a selection of papers published in Biology Open, helping researchers promote themselves alongside their papers. Gonzalo Quiroga-Artigas is first author on ‘ Storage cell proliferation during somatic growth establishes that tardigrades are not eutelic organisms’, published in BiO. Gonzalo is a postdoc in the lab of María Moriel-Carretero at Centre de Recherche en Biologie cellulaire de Montpellier (CRBM), Université de Montpellier, France, delving into the genetic factors that influence the extremophile abilities of tardigrades
Métricas de autor Luis Alberto Quiroga Baquero
No full textInforme de las métricas de autor del Dr. Luis Alberto Quiroga Baquero de las publicaciones indexadas en Google Académico cuyo objetivo es entregar un insumo para el fortalecimiento de las capacidades y potencialidades de los autores de la Universidad Santo Tomás en el posicionamiento y visibilidad de sus publicaciones.Report of the author metrics Luis Alberto Quiroga Baquero of the publications indexed in Google Scholar whose objective is to provide an input for the strengthening of the capacities and potentialities of the authors of the Santo Tomás University in the positioning and visibility of their publications.http://unidadinvestigacion.usta.edu.c
Los principios de transparencia y selección objetiva en los Acuerdos Marco de Precio en Colombia
No full textArtículo de investigaciónEn el documento se realiza un estudio de los Acuerdos Marcos de Precios a la luz de los principios de transparencia y selección objetiva como mecanismo de la administración para establecer economías a escala, analizando si la implementación de esta modalidad de contratación administrativa incentiva la constitución de oligopolios, limitando la participación de Mypimes en los entes territoriales. (Tomado de la fuente).PregradoAbogadoINTRODUCCIÓN
1. PRINCIPIOS DE LA CONTRATACIÓN ESTATAL
2. MODALIDADES DE CONTRATACIÓN PÚBLICA
3. NATURALEZA JURÍDICA DE LOS ACUERDOS MARCO DE PRECIOS
4. DISEÑO, ORGANIZACIÓN Y CELEBRACIÓN DE LOS ACUERDOS MARCO DE PRECIOS
5. LA LIBRE COMPETENCIA EN LOS ACUERDOS MARCO DE PRECIOS
6. APLICACIÓN DE LOS PRINCIPIOS DE TRANSPARENCIA Y SELECCIÓN OBJETIVA EN LOS ACUERDOS MARCO DE PRECIO
CONCLUSIONES
REFERENCIA
Dulce Chacón "novela y poesía describen universos distintos": conversación con la autora de "Algún amor que no mate"
No full textTranscription of the conversation between the author, the poet Quiroga Clérigo and the writer Dulce Chacón.Reproducción del diálogo entre el autor, el poeta Manuel Quiroga Clérigo y la escritora Dulce Chacón
Synthesis of 3-aryl-1,2,4-benzotriazines via intramolecular cyclization of solid-supported o-hydrazidoanilines
No full textAn efficient solid-phase protocol for the rapid generation of libraries of biologically promising 1,2,4-benzotriazines, including amino acid-derived components, is described.Fil: Cortés, Edwar. Universidad del Valle; ColombiaFil: Mendez, Luciana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Química Rosario. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas. Instituto de Química Rosario; ArgentinaFil: Mata, Ernesto Gabino. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Química Rosario. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas. Instituto de Química Rosario; ArgentinaFil: Abonia, Rodrigo. Universidad del Valle; ColombiaFil: Quiroga, Jairo. Universidad del Valle; ColombiaFil: Insuasty, Braulio. Universidad del Valle; Colombi
5-Amino-1-benzoyl-3-methylpyrazole: complex sheets built from N—H...N, C—H...O and C—H...?(arene) hydrogen bonds
No full textMolecules of the title compound [systematic name: (5-amino-3-methylpyrazol-1-yl)(phenyl) methanone], C(11)H(11)N(3)O, contain an intramolecular hydrogen bond. The molecules are linked into sheets by a combination of N-H center dot center dot center dot N, C-H center dot center dot center dot O and C-H center dot center dot center dot pi(arene) hydrogen bonds. Comparisons are made with the hydrogen-bonded structures of some related compounds
A hydrogen-bonded dimer in 6-(4-bromophenyl)-3-methyl-1-phenyl-4,5-dihydro-1H-pyrazolo[3,4-b]pyridine and a chain of rings built from N—H...N and C—H...?(pyridine) hydrogen bonds in 3-(4-nitrophenyl)-4-phenyl-1H-pyrazolo[3,4-b]pyridine
No full textIn 6-(4-bromophenyl)-3-methyl-1-phenyl-4,5-dihydro-1H-pyrazolo[ 3,4-b] pyridine, C(19)H(16)BrN(3), the reduced pyridine ring adopts a conformation that is close to a screw-boat form. Molecules are linked by pairs of symmetry-related C-H center dot center dot center dot pi (arene) hydrogen bonds into cyclic centrosymmetric dimers. Molecules of 3-(4-nitrophenyl)-4-phenyl-1H-pyrazolo[3,4-b] pyridine, C(18)H(12)N(4)O(2), are linked into centrosymmetric R(2)(2)(8) dimers by pairs of symmetry-related N-H center dot center dot center dot N hydrogen bonds, and these dimers are linked by pairs of C-H center dot center dot center dot pi (pyridine) hydrogen bonds to form a chain of edge-fused rings, or a molecular ladder, along [100]. The molecular aggregation in this compound is completed by two weak C-H center dot center dot center dot O hydrogen bonds, one of which links the chains along [100] into sheets
2-Cyano-N-(2,6-dimethoxypyrimidin-4-yl)-3-[4-(dimethylamino)phenyl]acrylamide and dimethylammonium 6-cyano-1,3-dimethyl-2,4,5-trioxo-1,2,3,4,5,8-hexahydropyrido[2,3-d]pyrimidin-8-ide: a ?-stacked dimer and a hydrogen-bonded ribbon containing three types of ring
No full textThe bond distances in 2-cyano-N-(2,6-dimethoxypyrimidin-4-yl)-3-[4-(dimethylamino)phenyl]acrylamide, C(18)H(19)N(5)O(3), (I), and in the anionic component of the salt dimethylammonium 6-cyano-1,3-dimethyl-2,4,5-trioxo-1,2,3,4,5,8-hexahydropyrido[2,3-d]pyrimidin-8-ide, C(2)H(8)N(2)(+)center dot C(10)H(7)N(4)O(3)(-), (II), provide evidence for the occurrence of electronic polarization. There are no hydrogen bonds in the structure of (I), instead pairs of molecules are linked into centrosymmetric dimers by a single pi-pi stacking interaction. In (II), a combination of a two-centre N-H center dot center dot center dot O hydrogen bond, a three-centre N-H center dot center dot center dot(O)(2) hydrogen bond, together utilizing all three O atoms, and a two-centre C-H center dot center dot center dot N hydrogen bond, link the components into a ribbon containing R(1)(2)(6), R(2)(2)(10) and R(6)(6)(30) rings
(E)-N2-{4-[(E)-2-(4-Chlorobenzoyl)ethenyl]-3-methyl-1-phenyl-1H-pyrazol-5-yl}-N1,N1-dimethylformamidine: polarized molecules within sheets of ?-stacked hydrogen-bonded chains
No full textThe molecules of the title compound, C22H21ClN4O, are conformationally chiral, and in the space group P2(1)2(1)2(1) each crystal contains only one conformational enantiomer. The intramolecular dimensions provide evidence for polarization of the electronic structure. Molecules are linked by a single C-H center dot center dot center dot pi(arene) hydrogen bond into chains, which are themselves weakly linked into sheets by an aromatic pi-pi stacking interaction
Quiroga y el mito del Plata
No full textThe article offers a rereading of Horacio Quiroga’s work, particularly the one published in 1917 and 1926, in which the tension between languages and cultures present in the area of the triple frontier appears. The author points out the Quiroga’s interpellations in his writing from a paradox: “Quiroga narrates the Argentine border with Brazil and Paraguay; he tells in Spanish about the conflict of several languages (Spanish of Misiones, Portuguese, Guarani and even other indigenous languages such as Quechua), in the impure articulation of various cultures”. In development, Rocca provides elements to rethink the location of Quiroga’s literature and the tensions of the Argentine literary field, at the beginning of the 20th century, around a consecrated line of the national as the “gauchesca”.El artículo se propone una relectura de la obra de Horacio Quiroga, particularmente la publicada en 1917 y 1926, en la que se pone en escena la tensión entre lenguas y culturas presentes en la zona de la triple frontera. Habla de las interpelaciones que ejerce en su escritura a partir una paradoja: “Quiroga narra la frontera argentina en contacto con Brasil y Paraguay; narra en español sobre el conflicto de varias lenguas (el español misionero, el portugués, el guaraní y hasta otras lenguas indígenas como el quechua), en el impuro empalme de varias culturas”. En el desarrollo, Rocca aporta elementos para repensar la ubicación de la literatura de Quiroga y las tensiones que el campo literario argentino manifiesta, a principios del siglo XX, en torno a una línea consagrada de lo nacional como lo fue la gauchesca
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