[en] Several problems concerning the computation of absorbed dose from ionizing photon interactions with different organic materials have been studied. The mass energy-absorption coefficients for several traditional Chinese medicines and staple crops are reported. The linear relation between the percent by weight of hydrogen in animal and plant tissues and other organic materials and the mass energy-absorption coefficients values are tabulated, with a correlation coefficient 0.9999. The elemental constituents in organic ash content are analyzed quantitatively and their μ_en/ρ values are computed, so that the simple cavity theory correction to absorbed doses due to x and γ-radiation may be applied. (author)