In this paper, we present the study of RF radiation from mobile tower and its health effects on human body. Power density of RF radiation from a mobile tower have been measured in close proximity to the mobile base station (GSM 900) at the selected locality in Aizawl, Mizoram, India, which was erected in 2009. Questionnaire was conducted on different health problems faced by the inhabitants living near the base station. The absolute power densities have been measured at different houses which is compared with standard limits given by various authorities like International Commission on Non Ionizing Radiation Protection (ICNIRP), Bioinitiative : 2012 and with the current Indian Standards. Frequency spectrum was analysed at different sites. Different health symptoms of RF exposure faced by the inhabitants within 50m and outside 50m from the tower are analysed and compared. The result is also analysed based on sex. It was found that the inhabitants living within 50m are having more health complaints than those living outside 50m. It was also found that females are having more complaints than males. This type of study is the first time report in the state.

Radon is a radioactive inert gas that is produced naturally from the decay of uranium to radium. As it is formed, it is released into air or water-containing pores between soil and rock particles. From soil and rock natural forces move it into the earth and it dissolves in groundwater. This is of great medical concern as environmental radon is one of the major causes of dangerous health problems such as lung cancer. Measurements of radon content in water was carried out in the northeastern part of India namely Aizawl district and Kolasib district of Mizoram using SMART RnDuo. About 30 sources of water were examined in each district during the winter of 2017. Water samples were collected from stream water, spring water, pump water, open well, pond and Government supplied water. Radon content in water from Aizawl district ranges between 0.309 Bq/L to 32.53 Bq/L, and those from Kolasib district the range is 1.11 Bq/L to 22.18 Bq/ L. The overall average content of radon in water was found to be 6.88 Bq/L. The radon content measured for most of the sources were found to be well within the range which is considered safe (EPA 1998) except for few samples analysed.

Thermoelectric materials have an important role in electronic chips due to their capability of heat and electricity interconversion. Here we investigated thermoelectric properties of Zn3As2 and ZnSb by using density functional theory combined with the Boltzmann transport equation. We evaluated the well‐known thermoelectric figure of merit (ZT) of both materials and found a maximum ZT of 0.09 and 0.27 for Zn3As2 and ZnSb at 200°C and 1000°C, respectively. While investigating the electronic properties, we found that Zn3As2 has a direct band‐gap at the Γ‐point of 1.01 eV, while ZnSb has an indirect bandgap of 0.65 eV. Both materials exhibited high optical absorption and reflectivity in the visible and UV regions, which suggest that these materials are beneficial in photovoltaic cells, along with thermoelectric applications.

Indoor radon and thoron concentrations have been measured in the year 2015-2016 using the newly developed pin-hole based radon/thoron discriminating dosimeters with single entry. The measurements have been carried out in fifty dwellings of eight different villages/town situated in Saiha and Lawngtlai District, Mizoram. Dwellings were selected from the building type along with an idea of different ventilation conditions which affects the indoor concentration. Reinforce Cement Concrete (RCC) type of buildings are found to have the highest concentration of indoor radon (100.34 ± 7 Bq/m3) and thoron (41.41 ± 18 Bq/m3) and grounded house are found to have higher concentration compared to that of house with crawl space. However, the concentrations obtained in this work lies in the range covered by nationwide survey result as well as the ICRP regulations.

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