X- ray Energy Spectra Analysis of Lanthanum in Tissue Cells of Defferent Parts of Wheat Plant Studies of Energy Spectrum Analysis on the Absorption and Distributive Laws of Nutrient Elements in Sucking Roots of Ginkgo biloba L. EFFECTS OF CU STRESS ON MAIZE SEEDLINGS USING X-RAY ENERGY SPECTRUM AND FTIR SPECTRA METHODS X-Ray Energy Spectrum Analysis on Organ Distribution of Lanthanum and Other Elements in Wheat Seedling