1,435 research outputs found
Incidencia del programa reactiva Perú en la liquidez de la empresa Insa Ingenieros EIRL Junio 2020-Abril 2021
No full textEl presente artículo de investigación responde al objetivo: determinar la incidencia del financiamiento reactiva Perú en la liquidez de la empresa Insa Ingenieros EIRL, periodos 2020 -2021. Esta investigación fue de enfoque cuantitativo, el tipo de aplicación de tipo básica, la investigación básica, denominada también teórica o dogmática; el nivel de la investigación descriptivo, de corte longitudinal. Se recolectaron datos en diferentes momentos o periodos, con el propósito de hacer inferencias de cambios presentados; la población de estudio corresponde a la empresa Insa ingenieros EIRL, conformado por el personal del área administrativa y ventas. Específicamente, se analizaron los estados financieros de la empresa; la muestra analizada estuvo constituida por 16 estados financieros de la empresa INSA Ingenieros. Se llegó a la conclusión de que existe incidencia del financiamiento del programa reactiva Perú en la liquidez de la empresa Insa Ingenieros EIRL años 2020 -2021, comprobado con el estadístico de regresión lineal. Se confirma también que al solicitar el crédito reactiva Perú, las obligaciones financieras de la empresa se incrementaron y su liquidez disminuyó, demostrándose contablemente la relación entre ambas variables.LIMAEscuela Profesional de ContabilidadFinanza
Argentina entre inmigrantes y emigrantes. La evolución de los marcos normativos en materia migratoria
No full textLa dinámica migratoria internacional se inscribe en el contexto de procesos de transformación social y económica asincrónicos en función de estados y sociedades nacionales. El conjunto de los diferentes mecanismos a los que se asocia la gestión y direccionamiento de la migración ─tanto el protagonismo de las variaciones en el funcionamiento y las necesidades de los mercados y en las posibilidades de interconexión entre sociedades y estados nacionales, de fracturas sociales resultantes de tendencias políticas extremas o de alteraciones extraordinarias en las modalidades de distribución del ingreso, de normativas migratorias permisivas o restrictivas, del dinamismo de redes, nuevas o reactivadas, que conectan actores residentes en espacios distantes─ definieron en Argentina un patrón funcional dual atracción/expulsión para corrientes transoceánicas y de alcance regional dentro de América Latina, particularmente evidente y vigoroso en las últimas décadas. El presente capítulo se enmarca en el análisis de este patrón funcional dual para el caso migratorio argentino.Fil: Cozzani, Maria Rosa. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Saavedra 15. Instituto de Estudios Históricos, Económicos, Sociales e Internacionales. Instituto Multidisciplinario de Estudios Sociales Contemporáneos; ArgentinaFil: Insa, Cinthia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Saavedra 15. Instituto de Estudios Históricos, Económicos, Sociales e Internacionales. Instituto Multidisciplinario de Estudios Sociales Contemporáneos; Argentin
Embedded real-time software techniques to handle misfunctioning due to electromagnetic fields
No full textInternational audienceBrief bibliographical information : The team EMC of LESIA/INSA works on emission and susceptibility of electronic systems in cooperation with numerous firms from several domains including avionics (EADS) and automotive (Motorola, Siemens VDO). The team is a co-author of the standard IEC 62014-3, the organizer of the international conference EMC Compo and participates to the European projects MESDIE and LIMA
Volatile fingerprinting for the verification of virgin olive oil sensory quality
No full textPodeu consultar el III Workshop anual INSA-UB complet a: http://hdl.handle.net/2445/118993Sessió 2. Pòster núm. 1
Estudo da tratabilidade de um efluente têxtil por biomassa fixa através de um reator de leito fluidizado trifásico aeróbio /
No full textDissertação (Mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico
SO2 and SO3 reactions with [(C5Me5)(2)Sm-O-Sm (C5Me5)(2)]: a DFT investigation and comparison with CO2 reactivity
No full textbibtex: ISI:000403968300003 bibtex\location:'THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND',publisher:'ROYAL SOC CHEMISTRY',type:'Article',affiliation:'Maron, L (Reprint Author), Univ Toulouse, LPCNO, CNRS, INSA,UPS, 135 Ave Rangueil, F-31077 Toulouse, France. Louyriac, Elisa; Maron, Laurent, Univ Toulouse, LPCNO, CNRS, INSA,UPS, 135 Ave Rangueil, F-31077 Toulouse, France. Roesky, Peter W., KIT, Inst Inorgan Chem, Engesserstr 15, D-76131 Karlsruhe, Germany.','author-email':'[email protected] [email protected]',da:'2018-12-05','doc-delivery-number':'EY4SR',eissn:'1477-9234','journal-iso':'Dalton Trans.','keywords-plus':'CRYSTALLOGRAPHIC CHARACTERIZATION; SULFINATE COMPLEXES; ACTIVATION; OXO; LANTHANIDE; DITHIONITE; MECHANISM; DIOXIDE','number-of-cited-references':'20','research-areas':'Chemistry','times-cited':'3','unique-id':'ISI:000403968300003','usage-count-last-180-days':'3','usage-count-since-2013':'10','web-of-science-categories':'Chemistry, Inorganic & Nuclear'\International audienceRecently, it was shown that samarocene oxide [Cp*2SmO-SmCp*(2)] with Cp* = C5Me5 could react with organic and inorganic anhydrides. The reactions of [Cp*Sm-2-O-SmCp*(2)] with SO2 and SO3 are reported using DFT calculations and compared with the reactivity of CO2. These reactions exhibit similar features yielding [Cp*(2)-Sm-(mu-eta(1):eta(2)-OSO2)-SmCp*2] similar to [Cp*(2)-Sm(mu-eta(1):eta(2)-OCO2)-SmCp*(2)] and [Cp*(2)-Sm-(mu-eta(2):eta(2)-O2SO2)-SmCp*(2)] complexes
Synthesis and Reactivity of a Scandium Terminal Hydride: H-2 Activation by a Scandium Terminal Imido Complex
No full textbibtex: ISI:000413337400008 bibtex\location:'POSTFACH 101161, 69451 WEINHEIM, GERMANY',publisher:'WILEY-V C H VERLAG GMBH',type:'Article',affiliation:'Chen, YF (Reprint Author), Univ Chinese Acad Sci, Chinese Acad Sci, Shanghai Inst Organ Chem, State Key Lab Organometall Chem, 345 Lingling Rd, Shanghai 200032, Peoples R China. Maron, L (Reprint Author), Univ Paul Sabatier, CNRS, LPCNO, 135 Ave Rangueil, F-31077 Toulouse, France. Maron, L (Reprint Author), Univ Paul Sabatier, INSA, 135 Ave Rangueil, F-31077 Toulouse, France. Han, Xianghao; Xiang, Li; Mao, Weiqing; Lu, Erli; Leng, Xuebing; Chen, Yaofeng, Univ Chinese Acad Sci, Chinese Acad Sci, Shanghai Inst Organ Chem, State Key Lab Organometall Chem, 345 Lingling Rd, Shanghai 200032, Peoples R China. Lamsfus, Carlos A.; Maron, Laurent, Univ Paul Sabatier, CNRS, LPCNO, 135 Ave Rangueil, F-31077 Toulouse, France. Lamsfus, Carlos A.; Maron, Laurent, Univ Paul Sabatier, INSA, 135 Ave Rangueil, F-31077 Toulouse, France.','author-email':'[email protected] [email protected]',da:'2018-12-05','doc-delivery-number':'FK2UF',eissn:'1521-3765','funding-acknowledgement':'National Natural Science Foundation of China [21325210, 21421091]; Strategic Priority Research Program of the Chinese Academy of Sciences [XDB20000000]','funding-text':'This work was supported by the National Natural Science Foundation of China (Grant Nos. 21325210 and 21421091), and the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB20000000). L.M. is member of the Institut Universitaire de France. The Humboldt Foundation, the Chinese Scholarship Council, and the Chinese Academy of Science are also acknowledged as well as CalMip for computing time.','journal-iso':'Chem.-Eur. J.','keywords-plus':'C-H ACTIVATION; RARE-EARTH COMPLEXES; BOND ACTIVATION; BASE-FREE; LIGAND; HYDROGEN; CYCLOADDITION; DIHYDROGEN; DERIVATIVES; ALKYLIDENE','number-of-cited-references':'56','orcid-numbers':'Alvarez Lamsfus, Carlos/0000-0002-4442-7052','research-areas':'Chemistry','times-cited':'2','unique-id':'ISI:000413337400008','usage-count-last-180-days':'1','usage-count-since-2013':'21','web-of-science-categories':'Chemistry, Multidisciplinary'\International audienceDihydrogen is easily activated by a scandium terminal imido complex containing the weakly coordinated THF. The reaction proceeds through a 1,2-addition mechanism, which is distinct from the sigma-bond metathesis mechanism reported to date for rare-earth metal-mediated H-2 activation. This reaction yields a scandium terminal hydride, which is structurally well-characterized, being the first one to date. The reactivity of this hydride is reported with unsaturated substrates, further shedding light on the existence of the terminal hydride complex. Interestingly, the H-2 activation can be reversible. DFT investigations further eludciate the mechanistic aspects of the reactivity of the scandium anilido-terminal hydride complex with PhNCS but also on the reversible H-2 activation process
Samarium-Catalyzed Diastereoselective Double Addition of Phenylphosphine to Imines and Mechanistic Studies by DFT Calculations
No full textbibtex: ISI:000400097100003 bibtex\location:'POSTFACH 101161, 69451 WEINHEIM, GERMANY',publisher:'WILEY-V C H VERLAG GMBH',type:'Article',affiliation:'Cui, CM (Reprint Author), Nankai Univ, State Key Lab Elementoorgan Chem, Collaborat Innovat Ctr Chem Sci & Engn, Tianjin 300071, Peoples R China. Maron, L (Reprint Author), Univ Toulouse, LPCNO, CNRS, INSA,UPS,UMR 5215, 135 Ave Rangueil, F-31077 Toulouse, France. Li, Jianfeng; Song, Changhong; Liu, Jinxi; Fan, Guilan; Cui, Chunming, Nankai Univ, State Key Lab Elementoorgan Chem, Collaborat Innovat Ctr Chem Sci & Engn, Tianjin 300071, Peoples R China. Lamsfus, Carlos Alvarez; Maron, Laurent, Univ Toulouse, LPCNO, CNRS, INSA,UPS,UMR 5215, 135 Ave Rangueil, F-31077 Toulouse, France.','author-email':'[email protected] [email protected]',da:'2018-12-05','doc-delivery-number':'ET2JI',eissn:'1867-3899','funding-acknowledgement':'National Natural Science Foundation of China [21390401]; Humboldt Foundation; Chinese Academy of Sciences','funding-text':'We are grateful to the National Natural Science Foundation of China (21390401) for financial support. L.M. is a member of the Institut Universitaire de France. The Humboldt Foundation and the Chinese Academy of Sciences are acknowledged for financial support of this work. L.M. and C.A.L. are grateful to CalMip for the generous grant of computing time.','journal-iso':'ChemCatChem','keywords-plus':'H BOND ADDITION; AMINOPHOSPHINE LIGANDS; ASYMMETRIC ADDITION; CHIRAL 3,4-DIAZAPHOSPHOLANES; ALPHA-AMINOPHOSPHINES; EFFICIENT SYNTHESIS; METAL-COMPLEXES; HYDROPHOSPHINATION; ALKENES; CARBODIIMIDES','number-of-cited-references':'48','orcid-numbers':'Alvarez Lamsfus, Carlos/0000-0002-4442-7052','research-areas':'Chemistry','times-cited':'2','unique-id':'ISI:000400097100003','usage-count-last-180-days':'4','usage-count-since-2013':'13','web-of-science-categories':'Chemistry, Physical'\International audienceThe catalytic hydrophosphination of imines represents the most straightforward and atom-economical strategy for the preparation of alpha-aminophosphines, which are useful as biologically active molecules and ligands for catalysis. The first catalytic protocol for the rapid and high-yielding hydrophosphination of common imines enabled by an ene-diamido samarium methoxide catalyst was developed. The reaction allowed the efficient and diastereoselective synthesis of various bis(alpha-amino)phosphines through the double addition of PhPH2 to common imines. The catalytic reaction has a relatively wide substrate scope and offers high diastereoselectivities (up to 99: 1 dr for meso products) and high yields (up to 97%). DFT calculations disclosed an inner-sphere mechanism involving unprecedented activation of a Sm-O bond by a phosphine and stabilization of the addition intermediates by the metal center
Efectos del estrés académico en el rendimiento escolar de los estudiantes de séptimo grado de educación básica del Centro Escolar INSA del Municipio de Santa Ana
No full textLos estudiantes son una población vulnerable al fenómeno del estrés académico, debido a la serie de cambios que implica el nivel escolar, fenómeno mismo que los propios estudiantes a veces ignoran y, por ende, no son conscientes del daño que puede ocasionar a su salud, así como también a su desarrollo cognitivo. La presente investigación tiene como propósito conocer los efectos del estrés académico en el rendimiento escolar de los estudiantes de séptimo grado de educación básica del Centro Escolar INSA, la cual, ante todo, surge como premisa motivacional para conocer que el rendimiento académico está asociado a una serie de variables que no son exclusivamente pedagógicas
Nonchelated Phosphoniomethylidene Complexes of Scandium and Lutetium
No full textbibtex: ISI:000418204600015 bibtex\location:'1155 16TH ST, NW, WASHINGTON, DC 20036 USA',publisher:'AMER CHEMICAL SOC',type:'Article',affiliation:'Chen, YF (Reprint Author), Univ Chinese Acad Sci, Shanghai Inst Organ Chem, Chinese Acad Sci, State Key Lab Organomet Chem, 345 Lingling Rd, Shanghai 200032, Peoples R China. Maron, L (Reprint Author), Univ Paul Sabatier, LPCNO, CNRS, 135 Ave Rangueil, F-31077 Toulouse, France. Maron, L (Reprint Author), Univ Paul Sabatier, INSA, 135 Ave Rangueil, F-31077 Toulouse, France. Mao, Weiqing; Xiang, Li; Leng, Xuebing; Chen, Yaofeng, Univ Chinese Acad Sci, Shanghai Inst Organ Chem, Chinese Acad Sci, State Key Lab Organomet Chem, 345 Lingling Rd, Shanghai 200032, Peoples R China. Maron, Laurent, Univ Paul Sabatier, LPCNO, CNRS, 135 Ave Rangueil, F-31077 Toulouse, France. Maron, Laurent, Univ Paul Sabatier, INSA, 135 Ave Rangueil, F-31077 Toulouse, France.','author-email':'[email protected] [email protected]',da:'2018-12-05','doc-delivery-number':'FQ2RI','funding-acknowledgement':'National Natural Science Foundation of China [21325210, 21421091, 21732007]; Chinese Academy of Sciences [XDB20000000]','funding-text':'This work was supported by the National Natural Science Foundation of China (Grant Nos. 21325210, 21421091, and 21732007) and the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB20000000).','journal-iso':'J. Am. Chem. Soc.','keywords-plus':'METAL METHYLIDENE COMPLEXES; CARBON MULTIPLE BOND; ALKYLIDENE COMPLEXES; METATHESIS REACTIONS; CARBENE COMPLEXES; NOBEL LECTURE; REACTIVITY; ACTIVATION; TANTALUM; CRYSTAL','number-of-cited-references':'38','research-areas':'Chemistry','times-cited':'7','unique-id':'ISI:000418204600015','usage-count-last-180-days':'9','usage-count-since-2013':'22','web-of-science-categories':'Chemistry, Multidisciplinary'\International audienceThe first phosphoniomethylidene complexes of scandium and lutetium, [LLn(CHPPh3)X] (L = [MeC(NDIPP)CHC(NDIPP)Me](-); Ln = Sc, X = Me, I, TfO; Ln = Lu, X = CH2SiMe3), have been synthesized and fully characterized. DFT calculations clearly demonstrate the presence of an allylic Ln, C, P pi-type interaction in these complexes. X-ray diffraction indicates that the scandium iodide complex has the shortest Sc-C bond length to date (2.044(5)angstrom). These phosphoniomethylidene complexes readily convert into the ylide complexes, and the reactivity is affected by both X- anion and Ln(3+) ion. The reaction of lutetium complex with imine shows a rapid insertion of imine into the Lu-C(alkylidene) bond. DFT calculations indicate that, although the bonding situation seems similar to that of the scandium analog, the strong negative charge at the alkylidene carbon is not sufficiently screened by one hydrogen in the lutetium complex because of a more ionic bonding, and therefore, the reactivity of the lutetium complex is much higher
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