Results 181 to 190 of about 287,755 (288)

Educacion y tecnologia

, 2001
Actualmente, nuestro país se encuentra inmerso en el proceso de globalización, el cual implica lograr una inserción competitiva en la economía internacional, y a la vez elevar el nivel de la calidad de vida de sus habitantes; para lo cual el Estado costarricense se ha dado a la tarea de redefinir sus políticas públicas, durante los últimos años ...
openaire   +4 more sources

Development and Validation of a Cellulose‐Coated Stir Bar Sorptive Extraction Method for a Simple, Environmentally Friendly Approach to Measuring Free Glycerol in Biodiesel

Journal of the American Oil Chemists' Society, EarlyView.
Preparation of a highly porous cellulose‐coated stir bar for the selective, environmentally friendly extraction of free glycerol from biodiesel using the SBSE method, followed by HPLC‐DAD analysis of the extract after derivatization with benzoyl chloride.
Caroline Lopes da Silva, Maria Aparecida Barros, Antônio Carlos Ferreira Batista, Anizio Marcio de Faria   +3 more
wiley   +1 more source

Revista vol. 1 nº 2 - completo

EaD & Tecnologias Digitais na Educação, 2014
Revista EaD & Tecnologias Digitais na Educação
doaj  

Innovative PLA or PCL‐Based Ocular Implants Obtained From Tape Casting or Electrospinning for Sustained‐Release Dexamethasone

Journal of Applied Polymer Science, EarlyView.
PLA and PCL ocular implants prepared by tape casting and electrospinning provide sustained dexamethasone release with distinct release profiles governed by polymer type and processing method. The relationship between polymer structure, degradation behavior, and drug release demonstrates the potential of these fabrication techniques for controlled ...
Renata Bochanoski, Henrique Borba Modolon, Ronaldo Silveira, Januara Rodrigues, Tiago Bender Wermuth, Sabrina Arcaro, Oscar R. K. Montedo   +6 more
wiley   +1 more source

Expediente

EaD & Tecnologias Digitais na Educação, 2015
Revista EaD EaD & Tecnologias Digitais na Educação
doaj  

Application of Glycerol‐Based Adhesives in the Manufacture of Medium‐Density Particleboards

Journal of Applied Polymer Science, EarlyView.
In this study, glycerol‐ and diacid‐based wood adhesives were synthesized and applied to Pinus elliottii wood residues for the manufacture of medium‐density particleboards (MDP). ABSTRACT In this study, glycerol‐ and diacid‐based adhesives were synthesized and applied in the manufacture of medium‐density particleboards (MDP) using pine wood (Pinus ...
André Higo Azevedo Silva, Lucas Ricardo Fernandes Figueiredo, Eliton Souto de Medeiros   +2 more
wiley   +1 more source

Composition‐Tunable Lignocellulosic Aerogels From Eucalyptus spp. Bark for Oil and Cu2+ Adsorption

Journal of Applied Polymer Science, EarlyView.
Composition‐tunable lignocellulosic aerogels are produced from Eucalyptus spp. bark by combining cellulose, lignin, and microfibrillated cellulose without post‐synthetic functionalization. The resulting porous architectures show contaminant‐dependent performance: CEL favors cooking‐oil uptake, CEL‐M favors pump‐oil uptake, and CEL‐L‐M provides the ...
Patricia Oliveira Schmitt, Chiara das Dores do Nascimento, Everton Granemann Souza, Lincoln Audrew Cordeiro, Andre Lamounier Caixeta, Sarah Kalli Silva da Silva, Debora da Silva Rodrigues, Marlon Bender Bueno Rodrigues, Brendon Willian Guedes Barbosa, Fabio Pinto da Silva, Fabricio Celso, Robert Alan Burrow, Cesar Aguzzoli, Neftali Lenin Villarreal Carreno, Darci Alberto Gatto, Andre Luiz Missio   +15 more
wiley   +1 more source

refloraR: An R package for efficiently retrieving and analyzing plant specimen data from the Herbário Virtual Reflora

Applications in Plant Sciences, EarlyView.
Abstract Premise Advances in the digitization of herbarium collections are enabling open access to specimen data for research and conservation. In Brazil, the Herbário Virtual Reflora (HVR) hosts over 4.8 million high‐resolution images of botanical specimens and their associated data from 86 national and international herbaria.
Carlos Calderón del Cid, Ana Flávia Alves Versiane, Paula Leitman, Fabiana Ranzato Filardi, Rafaela Campostrini Forzza, Domingos Cardoso   +5 more
wiley   +1 more source

Heterostructured Semiconductors for Advanced Chemical and Biochemical Sensors: From Gas Sensors to Electrolyte‐Gated Transistors

Advanced Physics Research, EarlyView.
Heterostructured semiconductors enable synergistic interactions between complementary materials, improving charge transport, analyte adsorption, and signal transduction in chemical and biochemical sensors. Their integration allows for high sensitivity, selectivity, stability, and low‐power operation across gas and liquid‐phase devices, while novel ...
Martin Schwellberger Barbosa, Allyster Rodrigues Silva, Hugo José Nogueira Pedroza Dias Mello   +2 more
wiley   +1 more source

Gonadal development in scorpion mud‐turtles, Kinosternon scorpioides, in a controlled environment

The Anatomical Record, EarlyView.
Stage 20 was identified as the critical point for gonadal differentiation in Kinosternon scorpioides, providing key insights into sex determination. These findings enhance conservation strategies by supporting reproductive management and population viability in both in situ and ex situ programs. Abstract Research on gonadal development including sexual
Brenda Braga, Verônica Oliveira‐Bahia, Maria Auxiliadora Ferreira, José Ribamar Felipe Marques, Diva Araújo Guimarães   +4 more
wiley   +1 more source