The next steps will involve further screening of natural algae to find strains that are particularly efficient at using energy from sunlight to convert carbon dioxide into oils.
The Hamiltonian of sodium atom is reduced by using screening Coulomb potential, and the energy levels of sodium atom are calculated by means of twofold perturbation.
用屏蔽库仑势简化了钠原子的哈密顿，用两次微扰法计算了钠原子的能量，结果与实验值符合得较好。
3
A bacterial strain was isolated from soil using plate screening techniques with polyvinyl acetate as carbon and energy sources.