نتایج جستجو برای: rung
تعداد نتایج: 640 فیلتر نتایج به سال:
We formulate charge transfer model for a single doped spin ladder, relevant for the intrinsically doped plane of coupled spin ladders in Sr3Ca11Cu24O41. Assuming the presence of the experimentally observed charge order in the system we solve the model using Hartree-Fock approximation. Our results show the profound stability of the Zhang-Rice singlets with respect to other configurations of dope...
An eight-rung, 3T degenerate birdcage coil (DBC) was constructed and evaluated for accelerated parallel excitation of the head with eight independent excitation channels. Two mode configurations were tested. In the first, each of the eight loops formed by the birdcage was individually excited, producing an excitation pattern similar to a loop coil array. In the second configuration a Butler mat...
Method sensitivity is critical for evaluation of poststroke motor function. Skilled walking was assessed in horizontal, upward, and downward rung ladder walking to compare the demands of the tasks and test sensitivity. The complete step sequence of a walk was subjected to analysis aimed at demonstrating the walking pattern, step sequence, step cycle, limb coordination, and limb interaction to c...
We report on the synthesis, crystal structure, magnetic, thermodynamic, and electron-spin-resonance properties of coordination complex $[{\mathrm{Cu}}_{2}{(\mathrm{pz})}_{3}{(4\text{\ensuremath{-}}\mathrm{HOpy})}_{4}]{({\mathrm{ClO}}_{4})}_{4}$ (pz=pyrazine; 4-HOpy=4-hydroxypyridine). This material is identified as a spin-1/2 Heisenberg ladder system with exchange-coupling parameters ${J}_{rung...
In Wirklichkeit handelt es sich aber nicht um eine einzige Reaktion, vielmehr um einen komplexen Vorgang. Er besteht darin, daß während der Ver brennung ( — 128 kcal) von 180 g Glucose für die Bildung von 1370g lebendiger Zellsubstanz (s.o.) aus Nährstoff chemische und physikalische Arbeit geleistet wird. Dies bedeutet, daß 1 g Trockensub stanz 252 cal entspricht. Dieser Wert ist mit 1 g pro ...
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