Fig. 1. Proportion of different terahertz radiation induced bio-effects

Fig. 2. Microarray data for dermal fibroblasts exposed to terahertz radiation[39]. (a) Gene expression plot for fibroblasts exposed to 1 min and 2 min THz irradiations; (b) amplification of genes differentially expressed in both samples (DNA-deoxyribonucleic acid, IL-interleukin, RAD-RAD1 checkpoint DNA exonuclease, ITK-inducible T-cell kinase, ILRAP-interleukin receptor accessory protein, BIRC3-baculoviral IAP repeat-containing 3, BCL11A-B cell CLL/lymphoma 11A, ATP6VOD2-vaculolar ATP synthase subunit

Fig. 3. Interaction of THz radiation and mitotic spindle[40]. (a) Fields in the irradiated petri dish; (b) randomly orientated cells in the electric field (the effect of the field on spindle microtubules is maximum if they are perpendicular)

Fig. 4. Dipole reversal for water molecules in the phospholipid bilayer interior[12]. (a) Oxygen end of each of the bridging water molecules in the middle of the membrane is positioned toward the bottom; (b) oxygen end of each of the bridging water molecules in the middle of the membrane is positioned toward the top

Fig. 5. Number of live cells and cells at early and late stages of apoptosis in the sample versus the THz radiation exposure time[10]

Fig. 6. Biological response of mouse retinal ganglion cells (a) 0 h, (b) 6 h, and (c) 12 h after stopping low power terahertz radiation

Fig. 7. Gene specific effect of THz irradiation in mouse stem cell cultures[52]