Electric field exposure alters serum melatonin but not pineal melatonin synthesis in male rats

The pineal gland synthesizes melatonin exclusively at night, which gives melatonin the characteristic of a temporal synchronizer of the physiological systems. Melatonin is a regulator of insulin activities centrally and also peripherally and its synthesis is reduced in diabetes. Since monosodium glutamate (MSG) is often used to induce the type 2 diabetic and metabolic syndrome in animal models, the purpose of this work is to evaluate the potential effects of MSG given to neonates on the pineal melatonin synthesis in different aged male and female rats. Wistar rats were subcutaneously injected with MSG (4mg/g/day) or saline solution (0.9%) from the second to eighth post-natal day. The circadian profiles both melatonin levels and AANAT activity were monitored at different ages. Body weight, naso-anal length, adipose tissues weight, GTT, ITT and serum insulin levels were also evaluated. Typical obesity with the neonatal MSG treatment was observed, indicated by a great increase in adipose depots without a concurrent increase in body weight. MSG treatment did not cause hyperglycemia or glucose intolerance, but induced insulin resistance. An increase of melatonin synthesis at ZT 15 with phase advance was observed in in some animals. The AANAT activity was positively parallel to the melatonin circadian profile. It seems that MSG causes hypothalamic obesity which may increase AANAT activity and melatonin production in pineal gland. These effects were not temporally correlated with insulin resistance and hyperinsulinemia indicating the hypothalamic lesions, particularly in arcuate nucleus induced by MSG in early age, as the principal cause of the increase in melatonin production.

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Osteoblastic networks with deficient coupling: differential effects of magnetic and electric field exposure

Bone ◽

10.1016/s8756-3282(00)00315-x ◽

2000 ◽

Vol 27 (2) ◽

pp. 227-231 ◽

Cited By ~ 41

Author(s):

M.A. Vander Molen ◽

H.J. Donahue ◽

C.T. Rubin ◽

K.J. McLeod

Keyword(s):

Electric Field ◽

Field Exposure ◽

Differential Effects

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Introduction of Fine Engineered Domain Configuration into Potassium Niobate Single Crystals

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.350.89 ◽

2007 ◽

Vol 350 ◽

pp. 89-92

Author(s):

Keisuke Yokoh ◽

Tomomitsu Muraishi ◽

Song Min Nam ◽

Hirofumi Kakemoto ◽

Takaaki Tsurumi ◽

...

Keyword(s):

Electric Field ◽

Single Crystals ◽

Room Temperature ◽

Single Domain ◽

Potassium Niobate ◽

Field Exposure ◽

Domain State ◽

Domain Configuration ◽

Dc Electric Field ◽

Direction Of Polarization

To induce fine engineered domain configurations into potassium niobate (KNbO3) single crystals, two kinds of methods were performed, i.e., (1) high DC electric field exposure along the opposite direction of polarization of KNbO3 single-domain crystals at room temperature, and (2) introduction of randomly oriented fine domain configuration by heat treatment at 700 °C and then high DC electric field exposure along [001]c direction of KNbO3 multidomain crystals at room temperature. When the method (1) was performed, finally, the poled KNbO3 crystals became to single-domain state again through the formation of multidomain state. On the other hand, the KNbO3 multidomain crystals were obtained by using the method (2), and an enhancement of piezoelectric-related properties was observed.

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Influence of high voltage static electric field on antioxidant enzymes activity in male rats

Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE Cat. No.03CH37439) ◽

10.1109/iembs.2003.1280838 ◽

2004 ◽

Cited By ~ 1

Author(s):

G. Cieslar ◽

P. Sowa ◽

A. Sieron

Keyword(s):

Antioxidant Enzymes ◽

Electric Field ◽

High Voltage ◽

Male Rats ◽

Static Electric Field ◽

Enzymes Activity

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NOVEL ELECTRIC FIELD EXPOSURE CONTROL METHODS FOR MULTI-STORY BUILDINGS INSTALLED IN VICINITY OF HIGH-VOLTAGE APPARATUS USING FEM

ASEAN Engineering Journal ◽

10.11113/aej.v11.17872 ◽

2021 ◽

Vol 11 (4) ◽

pp. 179-203

Author(s):

Asaad Shemshadi ◽

Pourya Khorampour

Keyword(s):

Electric Field ◽

Electric Fields ◽

High Voltage ◽

Transmission Lines ◽

Reduction Rate ◽

Initial Value ◽

Field Exposure ◽

Faraday Cage ◽

Metal Shield ◽

Story Building

Facilities and buildings installed nearby high voltage equipment and electric field exposure is always a serious threat to the health of organisms and can have a significant impact on the functioning of sensitive and vital organs such as the heart and brain. Therefore, it is necessary to study the electromagnetic field value in these areas to control the intensity and restrict the induced value regarding to international recommendations. In this paper, the effects of 230KV transmission line electric fields on the environment are examined by proper FEM software.The model under consideration in this project is a four story building adjacent to the 230KV transmission line.At first, the distance between the building and high voltage transmission lines and its relationship to the intensity of the electric field is examined, and then the intensity of the electric field is compared to the standards of the International Commission on Non Ionizing Radiation Protection (ICNIRP). To continue, in places where the electric field exceeds the standard level value, solutions to reduce the intensity of the electric field to the tolerable value have been proposed.The first solution is to use a metal shield around the building as a Faraday cage, which weakens the potential for electric field value by creating an enclosed surface, the reduction rate is 4700%,both complete cage shape and incomplete cage shapes are considered in this study which reduces the exposure value to 62.5% of its initial value. The second approach to reducing the electric field is to use protective conductor paints against electromagnetic fields. In the following study, the effect of using trees as a barrier against electromagnetic radiation will be examined. Finally, the three proposed solutions are compared in terms of environmental constraints, economic justification, and the reduction in electric field value.

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