Theory of chemical bonds in metalloenzymes. XIV. Correspondence between magnetic coupling mode and radical coupling mechanism in hydroxylations with methane monooxygenase and related species

2010 ◽  
Vol 110 (15) ◽  
pp. 2955-2981 ◽  
Author(s):  
Toru Saito ◽  
Mitsuo Shoji ◽  
Hiroshi Isobe ◽  
Shusuke Yamanaka ◽  
Yasutaka Kitagawa ◽  
...  
Keyword(s):  
Related Species ◽  
Methane Monooxygenase ◽  
Magnetic Coupling ◽  
Coupling Mechanism ◽  
Chemical Bonds ◽  
Radical Coupling ◽  
Coupling Mode ◽  
Theory Of Chemical Bonds

Theory of chemical bonds in metalloenzymes. XV. Local singlet and triplet diradical mechanisms for radical coupling reactions in the oxygen evolution complex

2010 ◽  
Vol 110 (15) ◽  
pp. 3101-3128 ◽  
Author(s):  
Kizashi Yamaguchi ◽  
Mitsuo Shoji ◽  
Toru Saito ◽  
Hiroshi Isobe ◽  
Satomichi Nishihara ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Coupling Reactions ◽  
Chemical Bonds ◽  
Radical Coupling ◽  
Theory Of Chemical Bonds

Theory of chemical bonds in metalloenzymes. IX. Theoretical study on the active site of the ribonucleotide reductase and the related species

2007 ◽  
Vol 107 (15) ◽  
pp. 3250-3265 ◽  
Author(s):  
Mitsuo Shoji ◽  
Hiroshi Isobe ◽  
Yu Takano ◽  
Yasutaka Kitagawa ◽  
Shusuke Yamanaka ◽  
...  
Keyword(s):  
Ribonucleotide Reductase ◽  
Active Site ◽  
Related Species ◽  
Theoretical Study ◽  
Chemical Bonds ◽  
Theory Of Chemical Bonds

A Magnetic Drive Actuator for Micro Electrical Discharge Machining

2012 ◽  
Vol 591-593 ◽  
pp. 303-306
Author(s):  
Xiao You Zhang ◽  
Akio Kifuji ◽  
Dong Jue He
Keyword(s):  
Electrical Discharge ◽  
High Speed ◽  
Degrees Of Freedom ◽  
Electrical Discharge Machining ◽  
Magnetic Coupling ◽  
Magnetic Bearings ◽  
Coupling Mechanism ◽  
Micro Electrical Discharge Machining ◽  
Long Stroke ◽  
Magnetic Drive

Electrical discharge machining has the capability of machining all conductive materials regardless of hardness, and has the ability to deal with complex shapes. However, the speed and accuracy of conventional EDM are limited by probability and efficiency of the electrical discharges. This paper describes a three degrees of freedom (3-DOF) controlled, wide-bandwidth, high-precision, long-stroke magnetic drive actuator. The actuator can be attached to conventional electrical discharge machines to realize a high-speed and high-accuracy EDM. The actuator primarily consists of thrust and radial magnetic bearings, thrust and radial air bearings and a magnetic coupling mechanism. By using the thrust and radial magnetic bearings, the translational motions of the spindle can be controlled. The magnetic drive actuator possesses a positioning resolution of the order of micrometer, a bandwidth greater than 100Hz and a positioning stroke of 2mm.

Theory of chemical bonds in metalloenzymes II: Hybrid-DFT studies in iron-sulfur clusters

2005 ◽  
Vol 105 (6) ◽  
pp. 628-644 ◽  
Author(s):  
M. Shoji ◽  
K. Koizumi ◽  
Y. Kitagawa ◽  
S. Yamanaka ◽  
T. Kawakami ◽  
...  
Keyword(s):  
Chemical Bonds ◽  
Dft Studies ◽  
Iron Sulfur Clusters ◽  
Iron Sulfur ◽  
Theory Of Chemical Bonds

Magnetic coupling of waves and oscillations in the lower solar atmosphere: can the tail wag the dog?

2005 ◽  
Vol 364 (1839) ◽  
pp. 351-381 ◽  
Author(s):  
Robert Erdélyi
Keyword(s):  
Magnetic Fields ◽  
Solar Atmosphere ◽  
Acoustic Waves ◽  
Large Scale ◽  
Magnetic Coupling ◽  
Small Scale ◽  
Coupling Mechanism ◽  
Frequency Shifts ◽  
Characteristic Features ◽  
Lower Solar Atmosphere

Can the ubiquitously magnetic solar atmosphere have any effect on solar global oscillations? Traditionally, solar atmospheric magnetic fields are considered to be somewhat less important for the existence and characteristic features of solar global oscillations ( p , f and the not-yet-observed g -modes). In this paper, I demonstrate the importance of the presence of magnetism and plasma dynamics for global resonant oscillations in the solar atmosphere. In particular, in the lower part of the solar atmosphere there are both coherent and random components of magnetic fields and velocity fields, each of which contribute on its own to the line widths and frequency variations of solar global acoustic waves. Changes in the coherent large-scale atmospheric magnetic fields cause frequency shifts of global oscillations over a solar cycle. The random character of the continuously emerging, more localized, magnetic carpet (i.e. small-scale, possibly even sub-resolution, loops) gives rise to additional frequency shifts. On the other hand, random and organized surface and sub-surface flows, like surface granulation, meridional flows or differential rotation, also affect the coupling mechanism of global oscillations to the lower magnetic atmosphere. The competition between magnetic fields and flows is inevitable. Finally, I shall discuss how solar global oscillations can resonantly interact with the overlaying inhomogeneous lower solar atmosphere embedded in a magnetic carpet. Line width broadening and distorsion of global acoustic modes will be discussed. The latter is suggested to be tested and measured by using ring-analysis techniques.

Magnetic coupling mechanism in A-site ordered perovskite YMn3Al4O12: Extended (Mn–O)–(O–Mn) superexchange

2013 ◽  
Vol 17 ◽  
pp. 63-66 ◽  
Author(s):  
Hongping Li ◽  
Xiaojuan Liu ◽  
Changsheng Li ◽  
Shuhui Lv ◽  
Yijia Bai ◽  
...  
Keyword(s):  
Magnetic Coupling ◽  
Coupling Mechanism ◽  
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