搜索结果: 1-15 共查到“理学 magnetic fields”相关记录90条 . 查询时间(0.125 秒)
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Microphysical and non-thermal processes in the circumgalactic medium: turbulence, magnetic fields and cosmic rays
银河系 周介质 微物理 非热过程 湍流 磁场 宇宙射线
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2023/4/18
Multiphase gas structure is ubiquitous in our universe. Recent observations suggest that large quantities of cool (10^4 K) gas are detected in the circumgalactic medium (CGM) of galaxy halos, which ex...
Physicists steer chemical reactions by magnetic fields and quantum interference（图）
磁场 量子干涉 化学反应 量子力学 超冷化学
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2023/6/9
Physicists in the MIT-Harvard Center for Ultracold Atoms (CUA) have developed a new approach to control the outcome of chemical reactions. This is traditionally done using temperature and chemical cat...
Scientists image magnetic fields at edge of M87's black hole（图）
Scientists mage magnetic fields edge M87 black hole
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2021/3/26
Event Horizon Telescope scientists, who produced the first image of a black hole, have revealed a new view of the massive object at the center of the M87 galaxy, showing how it looks in polarized...
Researchers develop ultra-sensitive device for detecting magnetic fields（图）
Researchers develop ultra-sensitive device detecting magnetic fields
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2020/6/19
A team of Brown University physicists has developed a new type of compact, ultra-sensitive magnetometer. The new device could be useful in applications involving weak magnetic fields, the re...
Scientists deepen understanding of magnetic fields that surround Earth（图）
Scientists magnetic fields surround Earth
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2019/10/23
Vast rings of electrically charged particles encircle the Earth and other planets. Now, a team of scientists has conducted research into waves that travel through this magnetic, electrically charged e...
Energetics of Primary Charge Separation in Bacterial Photosynthetic Reaction Center Mutants:Triplet Decay in Large Magnetic Fields
horseradish peroxidase lignin peroxidase enzymatic oxidations N-demethylation methylene blue azure B azure C
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2016/5/24
The triplet state of aromatic molecules forms and decays by intersystem crossing, as originally demonstrated by Kasha and Lewis. By contrast, the triplet state of the primary electron donor, 3 P, in p...
The Effect of Very High Magnetic Fields on the Reaction Dynamics in Bacterial Reaction Centers:Implications for the Reaction Mechanism
Reactioncenter Photosynthesis Bacterialphotosynthesis Delayedfluorescence Magnetic fieldeffect (Rb. sphaeroides)
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2016/5/23
Magnetic field effects have proven to be a powerful tool for elucidating the mechanism of the initial charge separation and recombination steps in bacterial photosynthesis. Since the first data were o...
The Effect of Very High Magnetic Fields on the Delayed Fluorescence from Photosynthetic Reaction Centers
Reactioncenter Photosynthesis Bacterialphotosynthesis Delayedfluorescence Magneticfieldeffect (Rb. sphaeroides)
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2016/5/23
Delayed fluorescence is observed from quinone-depleted Rhodobacter sphaeroides reaction centers due to re-formation of the excited state of the special pair electron donor from the initially formed ra...
Energetics of Initial Charge Separation in Bacterial Photosynthesis:The Triplet Decay Rate in Very High Magnetic Fields
Photosynthesis Electron transfer Reaction center Magnetic field effect primary electron acceptor primary electron donor quinone
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2016/5/20
The triplet state of the primary electron donor is formed in bacterial reaction centers when electron transfer to the quinone is blocked. The relative quantum yield of formation and the rate of decay ...
The Use of Large Magnetic Fields to Probe Photoinduced Electron Transfer Reactions:An Example from Photosynthetic Reaction Centers
Large Magnetic Fields Photoinduced Electron Transfer Reactions Photosynthetic Reaction Centers
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2016/5/20
We will outline an experimental approach that uses large magnetic fields and simple optical methods, combined with a method of data analysis, that is ideally suited for studying the mechanism of rapid...
The Effect of Large Magnetic Fields and the g-factor Difference On the Triplet Population in Photosynthetic Reaction Centers
Large Magnetic Fields g-factor Difference Triplet Population Photosynthetic Reaction Centers
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2016/5/20
The tnplet population m reduced photosynthetic reaction cente rs IS found to Increase on application of large magnetic fields (1 S-14 hG) We conclude that the tnplet IS fo rmed by charge recombmatron ...
Event Horizon Telescope Reveals Magnetic Fields at Milky Way's Central Black Hole
Telescope Magnetic Fields Milky Way Central Black Hole
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2015/12/14
Most people think of black holes as giant vacuum cleaners sucking in everything that gets too close. But the supermassive black holes at the centers of galaxies are more like cosmic engines, convertin...
Simulation Shows Key to Building Powerful Magnetic Fields
Powerful Magnetic Fields
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2015/12/8
When certain massive stars use up all of their fuel and collapse onto their cores, explosions 10 to 100 times brighter than the average supernova occur. Exactly how this happens is not well understood...
Anomaly disturbances of the magnetic fields before the strong earthquake in Japan on March 11, 2011
Magnetic field ULF magnetic field 2011 Japan earthquake
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2015/8/24
One of the strongest earthquakes, with magnitude M 8.9, occurred at the sea bottom near to the east coast of Japan on March 11, 2011. This study is devoted to the investigation of anomaly disturbances...
Fast-ignition design transport studies: realistic electron source, integrated PIC-hydrodynamics, imposed magnetic fields
Fast-ignition design transport realistic electron source integrated PIC-hydrodynamics imposed magnetic fields
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2012/5/29
Transport modeling of idealized, cone-guided fast ignition targets indicates the severe challenge posed by fast-electron source divergence. The hybrid particle-in-cell [PIC] code Zuma is run in tandem...