Results 81 to 90 of about 46,143 (280)

The method to obtain of the aggloburden sintering material using the conversion of natural gas

Metalurgija, 2019
The paper considers the processes of direct production of iron from ores, which a re called solid-phase reduction processes. A technology for the production of metallized agglomerate is proposed, consisting of two stages: sintering of agglomerate and ...
S. E. Shipilov, M. K. Ibatov, Zh. D. Zholdubayeva, A. D. Alkina, S. S. Shipilova, E. V. Yurchenko, A. D. Mekhtiyev   +6 more
doaj  

Coverage and reliability improvement of copper metallization layer in through hole at BGA area during load board manufacture

Reviews on Advanced Materials Science
The dimple of ball grid array (BGA) area with 70 mm × 70 mm size on load board for high performance integrated circuit final test is investigated by shadow moire at first, the dimple of BGA area decreases from 184.3 to 97.1 μm when six additional ...
Zhu Kai, Xing Ruimin, Jiang Zhongming, Zhong Rongjun, Chen Liuming, Liu Jianhui, Miao Hua, Zhou Guoyun   +7 more
doaj   +1 more source

Cyclic and low temperature effects on microcircuits [PDF]

Cyclic temperature and low temperature operating life tests, and pre-/post-life device evaluations were used to determine the degrading effects of thermal environments on microcircuit reliability.
Sisul, E. V., Weissflug, V. A.
core   +1 more source

C2α‐carbanion‐protonating glutamate discloses tradeoffs between substrate accommodation and reaction rate in actinobacterial 2‐hydroxyacyl‐CoA lyase

FEBS Open Bio, EarlyView.
Enzymes of the 2‐hydroxyacyl‐CoA lyase group catalyze the condensation of formyl‐CoA with aldehydes or ketones. Thus, by structural adaptation of active sites, practically any pharmaceutically and industrially important 2‐hydroxyacid could be biotechnologically synthesized. Combining crystal structure analysis, active site mutations and kinetic assays,
Michael Zahn, Barbara Seroka, Ryszard Lazny, Zenon Lotowski, Thore Rohwerder   +4 more
wiley   +1 more source

Superconductivity in Group III-V Semiconductor AlN Under High Pressure

Orbital: The Electronic Journal of Chemistry, 2015
The electronic properties of cubic zinc blende type group III-V semiconductor AlN under pressure is studied using full potential linear muffin-tin orbital (FP-LMTO) method.
G. Selva Dancy, V. Benaline Sheeba, C. Nirmala Louis, A. Amalraj   +3 more
doaj   +1 more source

Economic implications of current systems [PDF]

The primary goals of this study are to estimate the value of R&D to photovoltaic (PV) metallization systems cost, and to provide a method for selecting an optimal metallization method for any given PV system.
Aster, R. W., Daniel, R. E.
core   +1 more source

Whiskerless Schottky diode [PDF]

, 1991
A Schottky diode for millimeter and submillimeter wave applications is comprised of a multi-layered structure including active layers of gallium arsenide on a semi-insulating gallium arsenide substrate with first and second insulating layers of silicon ...
Bishop, William L., Mattauch, Robert J., Mcleod, Kathleen A.   +2 more
core   +1 more source

Chameleon sequences reveal structural effects in proteins representing micelle‐like distribution of hydrophobicity

FEBS Open Bio, EarlyView.
Amino acids sequence of two different proteins with the same sequence (chameleon sequence—black boxes) represent in 3D structure of the proteins different secondary structures: HHHH—helical and BBB—Beta‐structural. The chains folded in water environment adopt different III‐order structures in which the chameleon fragments appear to adopt similar status
Irena Roterman, Katarzyna Stapor, Leszek Konieczny, Krzysztof Gądek, Piotr Nowakowski   +4 more
wiley   +1 more source

Metallic liquid hydrogen and likely Al2O3 metallic glass

, 2011
Dynamic compression has been used to synthesize liquid metallic hydrogen at 140 GPa (1.4 million bar) and experimental data and theory predict Al2O3 might be a metallic glass at ~300 GPa.
D.E. Hare, D.G. Hicks, F. Hensel, G.I. Kanel, K. Umemoto, L.V. Altshuler, M. Bastea, P.A. Urtiew, R. Chau, R.F. Trunin, S. Ono, S.T. Weir, S.T. Weir, T. Mashimo, T.T. Chen, V.E. Fortov, W. J. Nellis, W.J. Nellis, W.J. Nellis, W.J. Nellis, W.J. Nellis, W.J. Nellis, W.J. Nellis, W.J. Nellis, Y. Wang   +24 more
core   +1 more source

Iron homeostasis disruption and lipid peroxidation in skeletal muscle during short‐term immobilization

FEBS Open Bio, EarlyView.
14‐day casting‐induced immobilization reduced gastrocnemius muscle mass and increased non‐heme iron and ferritin heavy chain levels. Despite iron accumulation, transferrin receptor 1 and iron regulatory protein 2 were paradoxically upregulated. Lipid peroxidation was elevated without compensatory antioxidant responses.
Haruka Yokogawa, Kazuhiko Higashida, Naoya Nakai   +2 more
wiley   +1 more source