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Boletín Informativo de la Unión de Universidades Latinoamericanas N° 5

open access: yes, 1950
El Boletín Mural de la Unión de Universidades de América Latina y el Caribe fue una edición periódica que se publicó en una sola lámina plegable desde 1949 a 1952 en la Imprenta Universitaria, Guatemala C. A.
Unión de Universidades Latinoamericanas
core   +1 more source

A Spatial Crowdsourcing Engine for Harmonizing Volunteers’ Needs and Tasks’ Completion Goals

open access: yesSensors
This work addresses the task allocation problem in spatial crowdsensing with altruistic participation, tackling challenges like declining engagement and user fatigue from task overload.
Maite Puerta-Beldarrain   +5 more
doaj   +1 more source

Chitin‐Chitosan Cryogels for the Reversible Sequestration and Recovery of Heavy Metals From Wastewater

open access: yesAdvanced Materials Technologies, EarlyView.
Chitin‐chitosan cryogels with degrees of N‐acetylation from 12.2% to 71.4% are fabricated by dissolution, coagulation and lyophilization for the sequestration of heavy metals from water. Colorimetry and differential pulse voltammetry showed controlled adsorption and desorption capacities for As5+, Co2+ and Cu2+, making this material attractive for ...
Marta García‐Castrillo   +4 more
wiley   +1 more source

Boletín Informativo de la Unión de Universidades Latinoamericanas N° 4

open access: yes, 1950
El Boletín Mural de la Unión de Universidades de América Latina y el Caribe fue una edición periódica que se publicó en una sola lámina plegable desde 1949 a 1952 en la Imprenta Universitaria, Guatemala C. A.
Unión de Universidades Latinoamericanas
core   +1 more source

Realidad y desafíos de las sociedades latinoamericanas

open access: yesRealidad, 1995
No hay resúmenes disponibles Realidad: Revista de Ciencias Sociales y Humanidades No.
(AUSJAL) Asociación de Universidades Jesuitas de América Latina
doaj   +1 more source

Single‐Step Fabrication of Smart 3D Microstructures Exploiting Naphthopyrans as Photoinitiators and Photochromic Molecules

open access: yesAdvanced Optical Materials, EarlyView.
Naphthopyran–benzophenone compounds can act simultaneously as photoinitiators and photochromic molecules for two‐photon polymerization. Using a single‐step process, liquid photoresist is encapsulated within polymerized 3D microstructures, preserving reversible UV–vis photochromism after fabrication.
João P. Leote   +5 more
wiley   +1 more source

Una inversión para el futuro

open access: yesRevista Habanera de Ciencias Médicas, 2005
En el informe entregado por Jeffrey D. Sachs, Presidente de la Comisión sobre Macroeconomía y Salud, a Cro. Harlem Brundtland, Directora General de la Organización Mundial de la Salud, 20 de diciembre de 2001, se plantea: “La comunidad mundial tiene a su
Isabel Caravia Pubillones   +6 more
doaj  

Um panorama das ações afirmativas em universidades federais do sudeste brasileiro

open access: yes, 2019
A tematica deste artigo relaciona-se ao acesso e a permanencia de estudantes pertencentes a grupos sub-representados no ensino superior. O objetivo e fornecer um quadro amplo em relacao ao tratamento das politicas de acoes afirmativas nas universidades ...
Guilherme Henrique Gomes da Silva
semanticscholar   +1 more source

Aberrations‐Corrected Ratiometric Parameters and PLQYs for Upconversion Thermometry in Hexagonal NaYF4:Yb3+,Er3+ and NaYF4:Yb3+,Tm3+ in Micro and Nanoscale Phosphors Using Novel Integrating Sphere Setup

open access: yesAdvanced Optical Materials, EarlyView.
Each optical system introduces aberrations in the reading of photoluminescence, which makes the signal dependant on the lab equipment. Here, a calibrated system is used to obtain the PLQYs and ratiometric parameters of popular upconverters to be used in thermometry.
Adilet Zhakeyev   +5 more
wiley   +1 more source

Influência da vernalização de semente na produção, crescimento e desenvolvimento de plantas de lisianthus

open access: yesSemina: Ciências Agrárias, 2018
A indução e controle do florescimento é fator limitante na produção comercial de flores de corte em lisianthus e ocorre pela exposição das sementes a baixas temperaturas, evento fisiológico denominado vernalização, o qual induz a diferenciação das gemas ...
Maria Yumbla-Orbes   +7 more
doaj  

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