1．规则的复数形式 15 构成法：一个名词如果表示一个或一样东西，它取单数形式，如pen，dog，tree，fact，church，kiss.如果表示两个或更多这类东西，则需用名词的复数形式，如pens，dogs，trees，facts，churches，kisses.构成名词复数，大多数是在单数形式后加-s或-es，有下面6种情况： a．在单数形式后直接加-s： girl girls hat hats neck necks tree trees pencil pencils kind kin
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
Mitoxantrone, a clinically useful antitumour antibiotic for leukaemia and breast cancer, has received more attentions. In this paper, the interaction between mitoxantrone and calf thymus DNA is investigated by Raman and fluorescence spectroscopies, a
We used Raman spectroscopy to study the conformational changes of DNA induced by Cd2+ ions in different Cd2+ concentrations solution. The experimental results show that when the Cd^(2+)/PO^(-)_(2) ratio R increased from 0 to 3.0, the band 835.0 cm^(-
