We construct a system of magnetic tweezers and apply it to study the interaction between histones and DNA. The condensation of DNA by purified histones at low ionic strengths is directly monitored by recording the len...We construct a system of magnetic tweezers and apply it to study the interaction between histones and DNA. The condensation of DNA by purified histones at low ionic strengths is directly monitored by recording the length of the DNA as a function of elapsed time. It is found that DNA condensates in a dynamic manner. The binding of hist, ones to DNA is energetically favoured, but the ten,sion applied on DNA tends to unravel the DNA-histone complex, The competition between the two processes determiners the rate of the DNA condensation.展开更多
We investigate the applicability of the independent atom model （IAM） to elastic electron scattering from complex polyatomic molecules, namely C4H10 and C6H6, in the energy range 100-1000eV. The cross sections of the...We investigate the applicability of the independent atom model （IAM） to elastic electron scattering from complex polyatomic molecules, namely C4H10 and C6H6, in the energy range 100-1000eV. The cross sections of the elastic electron scattering are calculated by employing the IAM together with the relativistic partial waves. The incorporation of both the modified absorption potential and the extended structural factor in the IAM makes the elastic differential cross sections and momentum transfer cross sections have a good agreement with the available experimental data. The present simple model seems to be insensitive to the complexity of the target molecules so that the proposed procedure can be quite useful for calculation of electron scattering from bio-molecules.展开更多
Based on the Perelmann mappings from the homogenous 5D onto the inhomogeneous Lorentz 4D manifold at liquid water phase temperature range, it is shown that coherent and decoherent molecules, water, carbon, hydrogen an...Based on the Perelmann mappings from the homogenous 5D onto the inhomogeneous Lorentz 4D manifold at liquid water phase temperature range, it is shown that coherent and decoherent molecules, water, carbon, hydrogen and oxygen naturally replace the Quarks in the standard model at Bethe fusion temperature as the SU(3) generators, leading to the formation of nitrogenous bases to house the monopole boson eigenstates that can exist within the RNA and DNA. Through which the growth of organic cells by inducing the Off Diagonal Long-Range Order of “p” type hole states in organic rings and bio-cells and thus “Life”.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No 10334100. The authors acknowledge the help of Professor .J. Yan of the National University of Singapore in setting up the instrument.
文摘We construct a system of magnetic tweezers and apply it to study the interaction between histones and DNA. The condensation of DNA by purified histones at low ionic strengths is directly monitored by recording the length of the DNA as a function of elapsed time. It is found that DNA condensates in a dynamic manner. The binding of hist, ones to DNA is energetically favoured, but the ten,sion applied on DNA tends to unravel the DNA-histone complex, The competition between the two processes determiners the rate of the DNA condensation.
基金Supported partially by the National Basic Research Programme of China under Grant No 2007CB815004, the Shanghai Development Foundation for Science and Technology under Grant No 06JC14082 and 06QA14062, the National Natural Science Foundation of China under Grant Nos 10535010 and 10775167.
文摘We investigate the applicability of the independent atom model （IAM） to elastic electron scattering from complex polyatomic molecules, namely C4H10 and C6H6, in the energy range 100-1000eV. The cross sections of the elastic electron scattering are calculated by employing the IAM together with the relativistic partial waves. The incorporation of both the modified absorption potential and the extended structural factor in the IAM makes the elastic differential cross sections and momentum transfer cross sections have a good agreement with the available experimental data. The present simple model seems to be insensitive to the complexity of the target molecules so that the proposed procedure can be quite useful for calculation of electron scattering from bio-molecules.
文摘Based on the Perelmann mappings from the homogenous 5D onto the inhomogeneous Lorentz 4D manifold at liquid water phase temperature range, it is shown that coherent and decoherent molecules, water, carbon, hydrogen and oxygen naturally replace the Quarks in the standard model at Bethe fusion temperature as the SU(3) generators, leading to the formation of nitrogenous bases to house the monopole boson eigenstates that can exist within the RNA and DNA. Through which the growth of organic cells by inducing the Off Diagonal Long-Range Order of “p” type hole states in organic rings and bio-cells and thus “Life”.
