Results 81 to 90 of about 4,122 (192)

AVALIAÇÃO DA GERAÇÃO DE RESÍDUOS EM DISCIPLINAS DE QUÍMICA ORGÂNICA E INORGÂNICA E PROPOSTAS DE REDUÇÃO

open access: yesRevista Brasileira de Ciências Ambientais, 2016
Foi realizada pesquisa sobre a atual situação da geração de resíduos nos laboratórios do Departamento Acadêmico de Química e Biologia da Universidade Tecnológica Federal do Paraná.
Ricardo Barbosa   +2 more
doaj   +1 more source

A new intersecting tunnel structure in the AIMIII[PO3(OH)]2 series for AI = Ag, MIII = In : Analysis of structural relationships. [PDF]

open access: yes, 2009
A new indium hydroxyphosphate containing silver, AgIn[PO3(OH)]2, has been synthesized using hydrothermal method. It crystallizes in the P21/c space group with the cell parameters a = 6.6400(2)Å, b=14.6269(6)Å, c=6.6616(4)A, β=95.681(5)°, V=643.82(6)Å3, Z=
Guesdon, Anne   +3 more
core   +2 more sources

Predicting properties of species derived from N-(1H-indol-3-ylmethyl)-N,N-dimethylamine, Gramine, a indol alkaloid. [PDF]

open access: yes, 2019
Hybrid B3LYP/6-31G* calculations were employed to study the structural, electronic,topological and vibrational properties of free base, cationic and hydrochloride species ofindol alkaloid, N-(1H-indol-3-ylmethyl)-N,N-dimethylamine known as gramine ...
Brandan, Silvia Antonia   +2 more
core   +1 more source

Regional Structural Change and Cohesion in the Process of European Integration: A Comparison of French, German, Portuguese and Spanish Regions [PDF]

open access: yes
The process of European integration entails regional structural change thereby affecting the economic situation of regions and the objective of regional cohesion in Europe.
Christiane Krieger-Boden
core  

¿Formulación química? Nomenclatura química

open access: yesRevista Eureka sobre Enseñanza y Divulgación de las Ciencias, 2014
Análisis crítico de una propuesta de enseñanza inicial de la nomenclatura de la química inorgánica que ignora las recomendaciones de la IUPAC de 2005, que quiere basarse en un concepto de valencia y que prescinde de la tabla periódica.
Salvador Olivares Campillo
doaj  

“Inorganic Chemistry”, de G. L. Miessler, P.J. Fisher, D. Tarr

open access: yesRevista de Química, 2014
Repaso de algunos de los aspectos más destacados e interesantes de la quinta edición del libro de texto de Química Inorgánica escrito por G. L. Miessler, P.J. Fisher y  D. Tarr. Editorial Pearson, New Jersey, 2014. 682 páginas.
Luis Ortega San Martín
doaj  

La Enseñanza de la Quimica Inorganica en Bachillerato

open access: yes, 2002
Maestría en Enseñanza Superior - Tesis presentada en UP ...
openaire   +1 more source

Determinació espetrofotofluorimètrica de traces d'alumini amb àcid pamoic [PDF]

open access: yes, 1985
A new spectrophotofluorometric method for the determination of submicrogram amounts of aluminum with painoic acid in a dioxane: water medium is described.
Izquierdo i Ridorsa, Anna
core  

Synthesis, characterization, and catalytic properties of AlPO4-40, CoAPO-40, and ZnAPO-40 [PDF]

open access: yes, 2013
The experimental conditions leading to the synthesis of pure and highly crystalline AlPO,-40, CoAPO-40, and ZnAPO-40 have been optimized. Although the preparation of these phases is favored by the presence of TMA+ in the synthesis gel, these ions have ...
Gabelica, Z.   +5 more
core  

Structural Studies and Spectroscopic properties of Quinolizidine Alkaloids (+) and (-)-Lupinine in different media [PDF]

open access: yes, 2019
The quinolizidine alkaloids, as numerous species of lupine (Lupinus spp.), are toxic andhave biological effect on the nervous system. Hence, four (+) and (-)- molecular structuresof quinolizidine alkaloid lupinine, named C0, C1a, C1b and C1c have been ...
Brandan, Silvia Antonia   +2 more
core  

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