The effect of 900 MHz radiofrequency radiation on oxidative stress and antioxidative enzymes activity in larvae of Apis mellifera Linné, 1758

Manger, Marin (2016) The effect of 900 MHz radiofrequency radiation on oxidative stress and antioxidative enzymes activity in larvae of Apis mellifera Linné, 1758. Diploma thesis, Faculty of Science > Department of Biology.

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Abstract

In recent years the use of mobile telephony has been on the rise, which has resulted in an increase of non-ionizing radio frequency electromagnetic (EM) radiation. Exposure to this radiation, although categorized as non-ionizing, could have a detrimental effect on organisms, causing oxidative stress. It is thought that the increase in EM radiation in the environment is one of the possible causes of bee colony losses, which play a vital role in ecological systems, as well as in economy. The aim of this study was to assess the impact of 900 MHz EM radiation on the activity of antioxidant enzymes and lipid peroxidation rate in honeybee larvae. Exposure to a continuous EM field strength of 10 V/m led to a reduction of catalase activity in the larvae of the bees while exposure to a modulated EM at field strength of 23 V/m led to an increase in the activity of glutathione S-transferaze and superoxide dismutase. The bee larvae exposed to continuous EM field strengths of 10, 23, 41 and 120 V/m measured lower rates of lipid peroxidation. The larvae exposed to EM field strength of 23 V/m and 1 kHz modulation inside the honeycomb were observed to have higher catalase activity and a reduction in glutathione S-transferaze activity. The observed effects were non-thermal in nature because there was no temperature increase in larvae due to the radiation exposure. Exposure to a modulated EM field had a greater effect than exposure to a continuous field. Despite the observed changes in the bee larvae, the obtained results are ultimately inconclusive as to whether the exposure to radiofrequency radiation is harmful to bees or can have a significant impact on honeybee colony losses.

Item Type: Thesis (Diploma thesis)
Keywords: non-ionizing electromagnetic radiation, oxidateve stress, honeybee
Supervisor: Tkalec, Mirta and Tlak Gajger, Ivana
Date: 2016
Number of Pages: 48
Subjects: NATURAL SCIENCES > Biology
Divisions: Faculty of Science > Department of Biology
Depositing User: Grozdana Sirotic
Date Deposited: 19 Jan 2017 13:28
Last Modified: 19 Jan 2017 13:28
URI: http://digre.pmf.unizg.hr/id/eprint/5434

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