Buscar
Mostrando ítems 11-20 de 1095
P2O5/SiO2 : A Simple and Effective Catalyst for the Synthesis of N-substituted 1-Alkyl and 1-Aryl 3-Aminoisoquinolines
(Bentham Science Publishers, 2013-04)
A synthesis of N-substituted 1-alkyl and 1-aryl 3-aminoisoquinolines by cyclocondensation of 2- acylphenylacetonitriles with aliphatic and aromatic amines using P2O5/SiO2 as catalysts is described. Selectivity, simplicity ...
Preparation and characterization of cassava starch acetate with high substitution degree
(Elsevier, 2020-03)
In this work, cassava starch (CS) was acetylated by a simple and scalable method to produce a highly hydrophobic polymeric material with potential use in coating and food packaging. The chemical structure, thermal stability ...
Sensorimotor strategies for recognizing geometrical shapes: A comparative study with different sensory substitution devices
(Frontiers Media S.A., 2015-06)
The sensorimotor approach proposes that perception is constituted by the mastery of lawful sensorimotor regularities or sensorimotor contingencies (SMCs), which depend on specific bodily characteristics and on actions ...
Electrophilicity and spin polarization of simple substituted silylenesCHEMICAL PHYSICS LETTERSCHEM PHYS LETT
(ELSEVIER SCIENCE PUBLISHERS B.V., 2017)
Electrophilicity and spin polarization of simple substituted silylenesCHEMICAL PHYSICS LETTERSCHEM PHYS LETT
(ELSEVIER SCIENCE PUBLISHERS B.V., 2017)
Integración por Sustitución
(2020-02-24)
El vídeo presenta la técnica de sustitución simple en integrales indefinidas. Ejemplos y ejercicios.
Role of viral load in Hepatitis B virus evolution in persistently normal ALT chronically infected patients
(Elsevier Science, 2019-01)
Chronic HBV infection has been associated with severe liver disease although most of them do not progress to this stage. Even though low replicative carriers form the largest group of HBV chronically infected patients, ...
Structural, dielectric and magnetic properties of Bi1 -xYxFeO3 (0 ≤ x ≤ 0.2) obtained by acid-base co-precipitation
(Elsevier Science Sa, 2014-04)
Bismuth-iron oxides with partial substitution of bismuth by yttrium, referred as (Bi1-xYx)FeO 3, were synthesized by simple-low cost acid-base co-precipitation method, which constitutes a difference with the currently used ...
An expedient route to heterocycles througha-arylation of ketones and arylamides bymicrowave induced thermal SRN1 reactions
(Royal Society of Chemistry, 2014-03)
Microwave irradiation promotes a quick aromatic nucleophilic substitution by a thermally induced electrontransfer process to form new C–C bonds by the coupling of aryl radicals and enolate nucleophiles. Diverse2-aryl-1-p ...
A confluent calculus of macro expansion and evaluation
(UR. FI – INCO., 1991)
Syntactic abbreviations or macros provide a powerful tool to increase the syntactic expressivity of programming languages. The expansion of these abbreviations can be modeled with substitutions. This paper presents an ...