Results 41 to 50 of about 55,835 (345)

Photocatalytic Versus Stoichiometric Hydrogen Generation Using Mesoporous Silicon Catalysts: The Complex Role of Sacrificial Reagents

Advanced Functional Materials, EarlyView.
This study highlights the importance of accounting for stoichiometric hydrogen produced when utilizing Si photocatalysts. The stoichiometric contribution is sacrificial reagent dependent and decreases with increasing sterics around the catalyst surface.
Sarrah H. Putwa, Sarah A. Martell, Berthold Reis, Simona Schwarz, Mita Dasog   +4 more
wiley   +1 more source

An Extremely Massive White Dwarf of the Symbiotic Classical Nova V407 Cyg as Suggested by the RS Oph and U SCO Models

Open Astronomy, 2012
We have analyzed the optical light curve of the symbiotic star V407 Cyg that underwent a classical nova outburst in 2010 March. Being guided by a supersoft X-ray phase observed during days 20-40 after the nova outburst, we are able to reproduce the light
Hachisu I., Kato M.
doaj   +1 more source

Gamma-ray Novae: Rare or Nearby?

, 2016
Classical Novae were revealed as a surprise source of gamma-rays in Fermi LAT observations. During the first 8 years since the LAT was launched, 6 novae in total have been detected to > 5 sigma in gamma-rays, in contrast to the 69 discovered optically in
Brown, Anthony M., Chadwick, Paula M., Cotter, Garret, Morris, Paul J.   +3 more
core   +1 more source

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

Gap Transients Interacting with Circumstellar Medium

Universe, 2022
In the last 20 years, modern wide-field surveys discovered a new class of peculiar transients, which lie in the luminosity gap between standard supernovae and classical novae. These transients are often called “intermediate luminosity optical transients”
Yongzhi Cai, Andrea Reguitti, Giorgio Valerin, Xiaofeng Wang   +3 more
doaj   +1 more source

Life after eruption - I. Spectroscopic observations of ten nova candidates

, 2012
We have started a project to investigate the connection of post-novae with the population of cataclysmic variables. Our first steps in this concern improving the sample of known post-novae and their properties.
A. Ederoclite, Bateson, C. Tappert, Cardelli, Castelaz, Cruz, Diaz, Diaz, Downes, Downes, Duerbeck, Duerbeck, Duerbeck, Duerbeck, Eckert, Friedjung, Gill, Knight, L. Schmidtobreick, Landolt, Landolt, Lebzelter, Lynden-Bell, MacConnell, MacConnell, Munari, N. Vogt, Naylor, Patterson, Pickering, Pickering, Prialnik, R. E. Mennickent, Radiman, Reid, Ringwald, Sanduleak, Schlegel, Schmidtobreick, Schmidtobreick, Schmidtobreick, Schmidtobreick, Schmidtobreick, Sekiguchi, Semeniuk, Shara, Shara, Silva, Stetson, Szkody, Tebbutt, Townsley, Vogt, Vogt, Wade, Warner, Wenzel, Williams, Woudt, Woudt, Woudt, Yaron, Zacharias, Zorotovic, Zwitter, Šimon   +65 more
core   +1 more source

M31N-2007-06B: A Nova in the M31 Globular Cluster Bol 111 [PDF]

, 2007
We report spectroscopic observations of the nova M31N-2007-06b, which was found to be spatially coincident with the M31 globular cluster Bol 111. This nova is the first out of more than 700 discovered in M31 over the past century to be associated with ...
Quimby, R. M., Shafter, A. W.
core   +2 more sources

Functional Materials for Environmental Energy Harvesting in Smart Agriculture via Triboelectric Nanogenerators

Advanced Functional Materials, EarlyView.
This review explores functional and responsive materials for triboelectric nanogenerators (TENGs) in sustainable smart agriculture. It examines how particulate contamination and dirt affect charge transfer and efficiency. Environmental challenges and strategies to enhance durability and responsiveness are outlined, including active functional layers ...
Rafael R. A. Silva, Giulio Fatti, Emanuel Carlos, Guilherme Ferreira, Sumita Goswami, Suman Nandy, Luiz H. C. Mattoso, Elvira Fortunato, Caio G. Otoni, Rodrigo Martins   +9 more
wiley   +1 more source

Direct reactions for astrophysical p-capture rates with ORRUBA and GODDESS

Frontiers in Physics
Understanding the nucleosynthesis and energy generation in quiescent and explosive stellar burning requires a detailed understanding of reaction rates on many unstable nuclides.
S. D. Pain
doaj   +1 more source

Novas tecnologias, novas competências [PDF]

Educar em Revista, 2008
O texto aborda a relação dos jovens e adolescentes com tecnologias, nem "novas" nem "velhas", e sim instrumentos para informar e comunicar, divertir, auxiliar nos trabalhos escolares. Apesar de reconhecer a familiaridade dessa geração com o que há de mais avançado em termos de tecnologia, aponta a necessidade de se compreender a complexidade desse novo
openaire   +2 more sources