Dependence of surface-enhanced Raman scattering （SERS） from Calf thymus DNA on anions is investigated. With the silver colloid, the bands at 732, 960 and 1333 cm^-1 for adenine （A）, 1466 cm^-1 for deoxyribose, and...Dependence of surface-enhanced Raman scattering （SERS） from Calf thymus DNA on anions is investigated. With the silver colloid, the bands at 732, 960 and 1333 cm^-1 for adenine （A）, 1466 cm^-1 for deoxyribose, and 1652 cm^-1 for the C=O group of thymine （T） are observably enhanced. With the presence of the Cl^- or SO4^2- anions, the bands at 732 and 1326/1329 cm^-1 for the symmetric stretching and skeletal vibrational modes of adenine （A） are dramatically enhanced, and the enhancement effect with the SO4^2- ion is more than that with the Cl^- ion. The experimental results show that the DNA molecule can be adsorbed on the silver colloid particles through the C6N and N7 of adenine （A） the C=O of thymine （T） and deoxyribose. Moreover, the formed hydrogen bonding of the Cl^- or SO4^2- ions to the C6NH2 group of adenine （A） can induce larger C6N electronegativity, which is favor for the C6N/N7 cooperative adsorption on the （Ag）^＋ colloid particles.展开更多
文摘锂电池作为电动汽车的核心,为电动汽车提供运行能量,它的各项参数状态不仅反映了电池的性能,而且是电动汽车发展的关键。锂电池的能量通常由电池管理系统(Battery Management System,BMS)来控制,并对整个车载电池进行实时监控和优化各项参数指标。该系统精确估算的核心内容就是电池电荷状态(State of Charge,SOC),同时SOC也是整车控制策略的重要依据。本文分析了影响锂离子电池SOC预测值的不同因素,论述了几种典型的锂离子电池SOC预测算法,并对各种算法优缺点进行比较。
基金the National Natural Science Foundation of China (No.10574046)the National Key Project for Basic Research of China (No.2006CB806006 and 2006CB921105)+3 种基金the Program for Changjiang Scholars and Innovative Research Team in University (PCSIRT)the Program for New Century Excellent Talents in University (NCET-04-0420)the Doctoral Program of High Education (No.20050269011)and the Phosphor Program sponsored by Shanghai Science and Technology Committee (No.06QH14003).
文摘Dependence of surface-enhanced Raman scattering （SERS） from Calf thymus DNA on anions is investigated. With the silver colloid, the bands at 732, 960 and 1333 cm^-1 for adenine （A）, 1466 cm^-1 for deoxyribose, and 1652 cm^-1 for the C=O group of thymine （T） are observably enhanced. With the presence of the Cl^- or SO4^2- anions, the bands at 732 and 1326/1329 cm^-1 for the symmetric stretching and skeletal vibrational modes of adenine （A） are dramatically enhanced, and the enhancement effect with the SO4^2- ion is more than that with the Cl^- ion. The experimental results show that the DNA molecule can be adsorbed on the silver colloid particles through the C6N and N7 of adenine （A） the C=O of thymine （T） and deoxyribose. Moreover, the formed hydrogen bonding of the Cl^- or SO4^2- ions to the C6NH2 group of adenine （A） can induce larger C6N electronegativity, which is favor for the C6N/N7 cooperative adsorption on the （Ag）^＋ colloid particles.
