optically less dense medium
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The results show that though the strain is growing slower in the nitrogen-free medium than in the nitrogen-containing medium, the content of capsular polysaccharides produced by the strain in the nitrogen-free medium is higher than those in the nitrogen-containing medium, the content of capsular polysaccharides produced by the strain in the nitrogen-free medium is higher than those in the nitrogen-containing medium. The capsular polysaccharides produced by the strain in the culture which contains different mineral powders will reach the highest content on the third or the fourth day in its growing period. The strain's capability of releasing potassium from k-feldspar and biotite in the nitrogen-containing medium is higher than that in the nitrogen-free medium because in the nitrogen-free medium, the strain and its production of glucoprotein are less than those in the nitrogen-containing medium.
结果表明,尽管该菌在无氮培养条件下的菌体数量远小于有氮培养条件,但无氮培养条件下所提取的细菌多糖多于在有氮条件下培养所提取的细菌多糖;胶质芽孢杆菌在以添加钾长石粉或黑云母粉制作的无氮培养基中生长可形成大量多糖,采用丙酮法进行细菌培养液多糖提取,发现细菌培养的第3天所提多糖含量最高;胶质芽孢杆菌在以添加钾长石粉或黑云母粉制作的有氮培养基中生长亦可形成较多的多糖,且在细菌培养的第4天所提多糖含量最高;胶质芽孢杆菌在有氮条件下对含钾矿物的释钾率高于在无氮条件下的释钾率,这可能与该菌在有氮条件下生长更快、可产生较多菌体细胞有关。
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In chapter 4, by AREELS, the Generalized Oscillator Strength Density Spectra were measured in the energy region from 56 to 66eV, with the incident energy 2. 5 keV and energy resolution 80 meV, at scattering angles from 0°to 6°, corresponding to the momentum transfer K〓=0.03~2. 01 a. u. The Fano profile parameters f〓 and q for the optically allowed transition 〓(0, 1)〓P°and the optically forbidden transitions 〓(1, 0)〓S〓and 〓(1, 0)〓D〓 were obtained as a function of K〓. With the hyperspherical coordinate wavefunctions, the dynamical correlation are discussed qualitatively. So, a new experimental way to study dynamical electron correlation effect is opened.In chapter 5, the widely used R-matrix theory was introduced. Then, the GOSDS for the optically allowed excitation series (1s〓)〓S〓→〓(0, 1)〓P°(n=2-4) were calculated by this method, and the Fano profile parameters f〓 and q were obtained sequently. So the electron correlation effect can be described by these parameters quantitatively, and the theoretical results were compared with our AREELS experimental results.
在第四章中,实验上,同样使用角分辨的高能量分辨快电子能量损失谱仪,在2.5keV电子入射能量和80meV的能量分辨下,测量了0°到6°散射角下的He原子双电子激发态在56~66eV的广义振子强度密度谱,这种情况,0°~6°对应的动量转移范围K〓=0.03~2.01a.u。,得到了光学允许跃迁的双电子激发态〓(0,1)〓P〓和光学禁戒跃迁的双电子激发态〓(1,0)〓S〓、〓(1,0)〓D〓的Fano线形参数f〓,q等随动量转移变化的曲线;观测到了几个强度很弱、能级很窄的光学允许和禁戒跃迁双电子激发态,用前人准确的理论结果进行了标识;通过比较弱共振〓(1,0)〓S〓和〓(-1,0)〓S〓的强度随动量转移K〓的变化规律,结合超球坐标理论计算的波函数,定性地阐述了在电子碰撞散射过程中它们各自不同的动力学电子关联效应,发展了一套在实验上研究电子关联效应的新方法。
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Results The data of A were higher in 0.5%, 1%, 2% erythritol culture medium than in xylitol culture medium at the same concentration, while lower in 8%, 12%, 16% erythritol culture medium than in xylitol culture medium at the same concentration. The data of pH were lower in 0.5%, 1%, 2% erythritol culture medium than in xylitol culture medium at the same concentration, while higer in 8%, 12%, 16% erythritol culture medium than in xylitol culture medium at the same concentration.
结果 在0.5%、1%、2%浓度下,赤藓糖醇培养基的A值较木糖醇培养基高,pH值较木糖醇培养基低,说明变异链球菌在含0.5%、1%、2%赤藓糖醇的培养基内的生长和产酸能力明显较相同浓度木糖醇培养基高。
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optically less dense medium:光疏介质
optically isotropic 光学各向同性的 | optically less dense medium 光疏介质 | optics 光学