講演情報
[19p-A311-6]Monitoring the effects of heavy metal (Cu) on Aquatic plant (Myriophyllum) using Biospeckle Optical Coherence Tomography and Statistical Interferometry Technique
〇(D)Maimaiti Zulupuhaer1, Hirofumi Kadono1, Uma Maheswari Rajagopalan2 (1.Saitama Univ., 2.Shibaura Inst)
キーワード：
Statistical interferometric technique、Biospeckle Optical Coherence Tomography、heavy metal copper
Heavy metal pollution is becoming a very important environmental issue. Copper is a heavy metal that can be harmful if ingested in excess. When Cu exceeding it is critical level might bring serious toxicological concerns such as vomiting, cramps, convulsions, or even death. We demonstrated two optical interferometric techniques to monitor the biological activities of plants. Firstly, biospeckle optical coherence tomography (bOCT) was proposed. In bOCT, the temporal speckle contrast variation of the OCT signal is used as a parameter to characterize the internal activities of the aquatic plant (Myriophyllum). Next, Statistical interferometric technique (SIT) was applied, and SIT is a highly sensitive, high speed and non-invasive optical technique developed by our group capable of measuring instantaneous sub-nanometer displacements. SIT applied to plant growth has revealed nanometric intrinsic fluctuations (NIF) that are reliable and sensitive to variations in the environment making NIF as a measure of healthiness of the plants. In this study, we demonstrated the validity of propose optical methods on detecting the effect of heavy metal copper, on aquatic plants by monitoring the NIF by SIT and bOCT observation together with traditional biometric methods.