Nina Bogdanova^1,2 and Stefan Todorov¹ (¹Institute of Nuclear Research and Nuclear Energy, BAS, Sofia and ²LIT, JINR) “Use of ORTHONORMAL POLYNOMIAL EXPANSION METHOD to the Energy Spectra of Biological Liquids”

Abstract In the following paper we apply our ORTHONORMAL POLYNOMIAL EXPANSION METHOD (OPEM) to the data obtained by the method of energy spectra to the liquid of the biomass in the case when herbicides are used. Since the biomass of а biological object contains liquid composed mainly of water, the method of water spectra is applicable to this case too. For comparison, it is also shown similar data obtained from control sample consisting of wheat liquid without the application of herbicides. The total (effective) variance OPEM method is involved including errors in both dependent and independent variables. Special criteria are used for evaluating optimal polynomial degree and number of iterations. The presented numerical results are good for orthonormal and obtained from it usual approximation. They can be useful for future analysis in ecology investigations.