Preparation and properties of oxide sculptured birefringent thin films .
氧化物雕塑双折射薄膜的制备及性能分析。
Microtubules cannot be both the birefringent material and the elements that cause chromosome separation .
微管既不是双折射物质也不是引起染色体分开的成分。
Nematic liquid crystals ( nlc ) are optically uniaxial , birefringent materials . Besides electric and magnetic fields , the orientations could be altered from the equilibrium states by acoustic fields .
