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Distribution of Vibrational Energy Levels of Protein Molecular Chains 被引量:2
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作者 pangxiao-feng CHENXiang-Rong 《Communications in Theoretical Physics》 SCIE CAS CSCD 2001年第3期323-326,共4页
The distributions of the quantum vibrational energy levels of the protein molecular chain are found by the discretely nonlinear Schr?dinger equation appropriate to protein obtained from the Davydov theory. The results... The distributions of the quantum vibrational energy levels of the protein molecular chain are found by the discretely nonlinear Schr?dinger equation appropriate to protein obtained from the Davydov theory. The results calculated by this method are basically consistent with the experimental values. Furthermore, the energy spectra at high excited states have also been obtained for the molecular chain which is helpful in researching the properties of infrared absorption and Raman scattering of the protein molecules. 展开更多
关键词 vibrational energy levels nonlinear Schrodinger equation protein molecules
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Calculation of Vibrational Energy—Spectra of α—Helical Protein Molecules and Its Properties
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作者 pangxiao-feng CHENXiang-Rong 《Communications in Theoretical Physics》 SCIE CAS CSCD 2002年第6期715-722,共8页
The quantum vibrational energy-spectra of amide-Is in alpha-protein molecules are calculated by using the discretely nonlinear Schrodinger equation and physical parameters appropriate to the systems on the basis of th... The quantum vibrational energy-spectra of amide-Is in alpha-protein molecules are calculated by using the discretely nonlinear Schrodinger equation and physical parameters appropriate to the systems on the basis of theory of bio-energy transport. The numerical results for the energy-spectra are basically consistent with the experimental values obtained by the infrared absorption and Raman scattering and emission-spectra of infrared lights of person's hand-fingers. Utilizing the energy-spectra we explain the laser-Raman spectrum from metabolically active E. Coli. and give some features of the infrared absorption of the protein molecules. 展开更多
关键词 蛋白质分子 α-螺旋蛋白质分子 振动能谱
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The Features of Infrared Absorption of the Protein Molecules in the Living System
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作者 pangxiao-feng 《Communications in Theoretical Physics》 SCIE CAS CSCD 2001年第6期763-768,共6页
We utilize a vibron-soliton model for amide-I vibrational quanta interacting with optical phonons to study the feature of infrared absorption of the protein molecules with finite temperature. The self-trapping of amid... We utilize a vibron-soliton model for amide-I vibrational quanta interacting with optical phonons to study the feature of infrared absorption of the protein molecules with finite temperature. The self-trapping of amide-I vibrational quantum results in red shift of the main peak and largely anomalous band to occur in the infrared absorption for the protein molecules. Utilizing the concise model of vibron and improved theory of color centers we have given theoretically the value of red shifts of the main peak and the intensity of anomalous band in infrared absorption,respectively, the latter reduces with increasing temperature which is consistent with the experimental result. 展开更多
关键词 生物体 蛋白质分子 红外吸收特征
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Effect of the Aharonov-Bohm flux on the magnetic gap soliton in antiferromagnetic chain
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作者 XUChang-tan ZHUMin pangxiao-feng 《原子与分子物理学报》 CAS CSCD 北大核心 2003年第1期39-44,共6页
Employing the double-sublattice, the coherent state ansatz, and the time-dependent variational principle, we have studied the effects of the Aharonov-Bohm flux on the soliton in one-dimensional antiferromagnetic chain... Employing the double-sublattice, the coherent state ansatz, and the time-dependent variational principle, we have studied the effects of the Aharonov-Bohm flux on the soliton in one-dimensional antiferromagnetic chain. The results show that the Aharonov-Bohm flux have an effect on the peak, the width, the energy and the spatial configuration of the spin of the soliton. 展开更多
关键词 反铁磁性 孤立子 流量 磁学性质
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