Results 81 to 90 of about 64,242 (295)

Effects of torrefaction on energy properties of Eucalyptus grandis wood [PDF]

, 2009
Torrefaction is a thermal treatment that promotes homogenization and improvement of energy properties of biomass. This study aims to evaluate the effects of torrefaction on the main energy properties of Eucalyptus grandis wood.
Oliveira Rodrigues, Thiago, Rousset, Patrick   +1 more
core  

An ultrahigh-vacuum cryostat for simultaneous scanning tunneling microscopy and magneto-transport measurements down to 400mK

, 2017
We present the design and calibration measurements of a scanning tunneling microscope setup in a 3He ultrahigh-vacuum cryostat operating at 400 mK with a hold time of 10 days.
Ast, Christian R., Becker, Stefan, Bindel, Jan Raphael, Johnsen, Tjorven, Liebmann, Marcus, Morgenstern, Markus, Muckel, Florian, Pezzotta, Mike, Saunus, Christian   +8 more
core   +1 more source

Mixed‐Metal Promotion in a Manganese‐Molybdenum Oxynitride as Catalyst to Integrate C─C and C─N Coupling Reactions for the Direct Synthesis of Acetonitrile from Syngas and Ammonia

Advanced Materials, EarlyView.
Transition metal oxy/carbo‐nitrides show great promise as catalysts for sustainable processes. A Mn‐Mo mixed‐metal oxynitride attains remarkable performance for the direct synthesis of acetonitrile, an important commodity chemical, via sequential C─N and C─C coupling from syngas (C1) and ammonia (N1) feedstocks.
M. Elena Martínez‐Monje, Wilson Henao, Tania Rodenas, Patricia Concepción, Virginia Pérez Dieste, Alexander Missyul, Giovanni Agostini, Gonzalo Prieto   +7 more
wiley   +1 more source

Research on the Influence of Transformer Winding on Partial Discharge Waveform Propagation

Energies
Partial Discharge (PD) measurement is one of the effective methods for assessing the internal insulation condition of power transformers in factories and substations. The pulse current signals generated by PD within transformer windings are significantly
Kaining Hou, Zhaoyang Kang, Dongxin He, Fuqiang Ren, Qingquan Li   +4 more
doaj   +1 more source

Empowering effect of ultra-high voltage transmission on urban green development [PDF]

Ziyuan Kexue
[Objective] The ultra-high voltage (UHV) “new infrastructure development” optimizes the power structure and rational allocation of power resources in China, and injects sustainable impetus into the green transformation of the economy. This study aimed to
GONG Jia, WU Zhenlei
doaj   +1 more source

Quantification of segregation dynamics in ice mixtures

, 2009
(Abridged) The observed presence of pure CO2 ice in protostellar envelopes is attributed to thermally induced ice segregation, but a lack of quantitative experimental data has prevented its use as a temperature probe. Quantitative segregation studies are
Bergin, Bergin, Bernstein, Bouwman, Chiar, Collings, Collings, Cuppen, Dartois, E. C. Fayolle, E. F. van Dishoeck, Ehrenfreund, Ehrenfreund, Fuchs, Garrod, Gerakines, Gerakines, Gerakines, H. Linnartz, H. M. Cuppen, Hodyss, Ioppolo, Jenniskens, K. I. Öberg, Knez, Loeffler, Los, Los, Merrill, Nummelin, Palumbo, Pontoppidan, Pontoppidan, Sandford, Sonnentrucker, Teolis, Tielens, van Broekhuizen, Visser, Watanabe, Watanabe, Zasowski, Öberg, Öberg   +43 more
core   +1 more source

Microscopic Insights into Magnetic Warping and Time‐Reversal Symmetry Breaking in Topological Surface States of Rare‐Earth‐Doped Bi2Te3

Advanced Materials, EarlyView.
Magnetic doping of the topological insulator Bi2Te3 with erbium adatoms induces out‐of‐plane magnetism and breaks time‐reversal symmetry, opening a Dirac gap and driving a Fermi surface transition from hexagonal to star‐of‐David geometry. Microscopy, spectroscopy, and magnetic dichroism reveal atomically controlled magnetic interactions that tailor the
Beatriz Muñiz Cano, Fabián Calleja, Ji Dai, Massimo Tallarida, Vera Marinova, Alessandro Barla, Marc G. Cuxart, Pierluigi Gargiani, Gonzalo N. Molina, José Angel Silva‐Guillén, Adriana I. Figueroa, Kevin García‐Díez, Sergio O. Valenzuela, Aitor Mugarza, Amadeo L. Vázquez de Parga, Rodolfo Miranda, Francisco Guinea, Manuela Garnica, Miguel A. Valbuena   +18 more
wiley   +1 more source

Study on the Impact of UHV AC Composite Cross-arms on Live Working Safety

Zhongguo dianli, 2019
The UHV AC composite cross-arm structure, quite different from the conventional towers, has a significant impact on the safety distance of live working, the mode of entering or exiting equipotential, and the electric field protection requirements of ...
Xinglie LEI, Yong PENG, Bin XIAO, Ting LIU, Kai LIU, Zhun ZHANG   +5 more
doaj   +1 more source

Scanning tunneling microscopy and spectroscopy studies of graphite edges

, 2005
We studied experimentally and theoretically the electronic local density of states (LDOS) near single step edges at the surface of exfoliated graphite. In scanning tunneling microscopy measurements, we observed the $(\sqrt{3} \times \sqrt{3}) R 30^{\circ}
Birgeneau, Elstner, Esquinazi, Fujita, Fujita, Giunta, H. Kambara, Hiroshi Fukuyama, K. Tagami, Kaneko, Klusek, Klusek, M. Tsukada, Matsui, Matsui, Miyamoto, Nakada, Niimi, T. Matsui, Tai, Y. Niimi   +20 more
core   +1 more source

Observation of surface charge screening and Fermi level pinning on a synthetic, boron-doped diamond [PDF]

, 1993
Spectroscopic current-voltage (I-V) curves taken with a scanning tunneling microscope on a synthetic, boron-doped diamond single crystal indicate that the diamond, boiled in acid and baked to 500 °C in vacuum, does not exhibit ideal Schottky ...
Baker, Shenda M., Baldeschwieler, John D., Rossman, George R.   +2 more
core   +1 more source