Results 91 to 100 of about 122,114 (294)

Proveniências no Neolítico; arqueometria em contextos geológicos distintos [PDF]

, 2015
O projeto MEGAGEO visa correlacionar os materiais geológicos usados na construção das antas, durante o Neolítico, com o seu local de extração. Envolve 3 áreas de estudo com contextos geológicos distintos - Lisboa, Freixo-Redondo e Monforte, cuja ...
Almeida, L., Boaventura, R., Machado, S., Mataloto, R., Moita, P., Máximo, J., Nogueira, P., Pedro, J., Pereira, A., Ribeiro, S., Santos, J. F.   +10 more
core  

Modulating Electrochemical CO2 Reduction Pathways via Interfacial Electric Field

Advanced Functional Materials, EarlyView.
Engineering interfacial electric fields in Cu/ITO electrodes enables precise control of CO2 reduction pathways. Charge transfer from Cu to ITO generates positively charged Cu species that steer selectivity from ethylene toward methane. This work demonstrates how interfacial electric‐field modulation can direct reaction intermediates and transform ...
Mahdi Salehi, Zhengyuan Gao, Sai Phani Kumar Vangala, Amirhossein Farzi, Hamed Heidarpour, Morgan McKee, Nikolay Kornienko, Ali Seifitokaldani   +7 more
wiley   +1 more source

Petrographic evaluation of a 50-year-old concrete pavement made with quartzitic aggregate [PDF]

, 2015
A 50-year-old pavement from the city of La Plata (Province of Buenos Aires, Argentina), which had recently been replaced due to significant deterioration (cracks, sinking, etc.), was examined.
Coelho Dos Santos, Gabriela, Maiza, Pedro, Marfil, Silvina Andrea   +2 more
core  

Trace elements in Turkish biomass fuels: Ashes of wheat straw, olive bagasse and hazelnut shell [PDF]

, 2009
Ash contents of wheat straw, olive bagasse and hazelnut shells were 7.9%, 3.9%, 1.2%, respectively, which seemed to be within the average values of ash of biomass.
Bakisgan, Ceren, Bakışgan, Ceren, Dumanli, Ahu Gumrah, Dumanlı, Ahu Gümrah, Yurum, Yuda, Yürüm, Yuda   +5 more
core   +1 more source

Rapid Sintering of Porous Organic Polymer Powders Into Mechanically Strong Monoliths for Efficient CO2 Capture

Advanced Functional Materials, EarlyView.
Spark plasma sintering enables rapid processing of porous organic polymer (POP) from fine powders to a freestanding and mechanically robust monolith. The sintering process retains the CO2 adsorption capacity and CO2/N2 selectivity, making the monolith more suitable as a solid sorbent for practical carbon capture applications.
Duan Li, Tianhui Shi, Sirui Ran, Lei Zeng, Chao Xu   +4 more
wiley   +1 more source

On the origin of Goa Cathedral former altarpiece: Material and technical assessment to the work of Garcia Fernandes, Portuguese painter from 16th century Lisbon workshop [PDF]

, 2018
Goa Cathedral former altarpiece is one of the oldest set of paintings in India. The seven remaining paintings from the first altarpiece of Goa Cathedral, nowadays in the sacristy, are attributed by some art historians to Master Garcia Fernandes (act ...
Antunes, Vanessa, Barrocas Dias, Cristina, Candeias, António, Cardoso, Ana, Carvalho, Maria Luísa, Manhita, Ana, Manso, Marta, Mirão, José, Serrão, Vitor   +8 more
core   +1 more source

In Situ Study of Resistive Switching in a Nitride‐Based Memristive Device

Advanced Functional Materials, EarlyView.
In situ TEM biasing experiment demonstrates the volatile I‐V characteristic of MIM lamella device. In situ STEM‐EELS Ti L2/L3 ratio maps provide direct evidence of the oxygen vacancies migrations under positive/negative electrical bias, which is critical for revealing the RS mechanism for the MIM lamella device.
Di Zhang, Rohan Dhall, Matthew M. Schneider, Cun Li, Chengyu Song, Sundar Kunwar, Hongyi Dou, Natanii R. Yazzie, Henry Tran, Daniel Appuing, Jim Ciston, Nicholas G. Cucciniello, Pinku Roy, Michael T. Pettes, John Watt, Winson Kuo, Haiyan Wang, Ye Cao, Rodney J. McCabe, Aiping Chen   +19 more
wiley   +1 more source

Thermal conductivity and microstructure of Bi-Sb alloys [PDF]

Hemijska Industrija
Four Bi-Sb alloys with compositions Bi79.6Sb20.4, Bi56.9Sb43.1, Bi39.8Sb60.2, Bi18.6Sb81.4 have been investigated regarding the microstructures and thermal properties. The microstructure was examined by scanning electron microscopy with energy-dispersive
Manasijević Dragan M., Milošević Mirjana S., Balanović Ljubiša T., Stamenković Uroš S., Marković Miljan S., Marković Ivana I.   +5 more
doaj   +1 more source

Removal of indigo carmine by a Ni nanoscale oxides/Schoenoplectus acutus composite in batch and fixed bed column systems [PDF]

, 2015
Removal behavior of indigo carmine by Schoenoplectus acutus and Ni nanoscale oxides/Schoenoplectus acutus composite was determined. The characterization of both materials was done by TEM, SEM/EDS, DRX, and BET.
COLIN CRUZ, ARTURO, COLIN CRUZ, ARTURO, Gutiérrez Segura, Edith Eriela, Gutiérrez Segura, Edith Eriela, SANCHEZ RODRIGUEZ, SALVADOR, SANCHEZ RODRIGUEZ, SALVADOR, Solache Ríos, Marcos José, Solache Ríos, Marcos José, Trujillo Reyes, Jesica, Trujillo Reyes, Jesica   +9 more
core   +1 more source

Multiscale Structuring of Hydroxyapatite via Two‐Photon Lithography of Nanocomposites

Advanced Functional Materials, EarlyView.
Hydroxyapatite scaffolds are of great interest in bone tissue engineering applications, ranging from 3D cell culture to regenerative medicine. Using two‐photon lithography of a transparent nanocomposite, hydroxyapatite microstructures with features ranging from submicron to centimeter‐scale are fabricated. This allows to mimic the natural bone geometry,
Leonhard Hambitzer, Jan Mathis Hornbostel, Richard Prediger, Sebastian Kluck, Michael Daub, Cornelia Lee‐Thedieck, Frederik Kotz‐Helmer   +6 more
wiley   +1 more source