Effect of controlled electromagnetic radiation on the growth of cells in tissue culture

Peters, Walter; Jackson, Richard W.; Iwano, K.

doi:10.1016/0022-4804(79)90103-3

Cited by 14 publications

(3 citation statements)

References 16 publications

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“…Enzymes are essential to ecosystem processes because they arbitrate innumerable reactions that have biogeochemical importance in soil [102]. It has been demonstrated that in vitro exposure of microbial cells to microwave energy increased cell membrane permeability [103], released DNA and protein [104], soluble carbohydrate concentration [105] and inhibited growth of cells [106]. The enzymatic activity, selectivity and stability could be improved through highfrequency electromagnetic energy in an aqueous medium [107].…”

Section: Enzyme Activity As a Function Of Microwave Soil Heatingmentioning

confidence: 99%

Microwave Weed and Soil Treatment in Rice Production

Khan¹,

Brodie²

2018

Rice Crop - Current Developments

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Herbicides resistance has challenged sustainable rice productivity. Consequently, interest in chemical-free weed management has increased to overcome this constraint. This chapter has demonstrated the effect of pre-sowing microwave soil heating as a new alternative to chemicals for confirmed herbicide resistant weeds of the Australian rice production system. Microwave can superheat weed plants, creating micro-steam explosions in the plant structures to kill weeds. This requires the least amount of energy to achieve weed control and can be likened to a 'knock down' herbicide treatment. Considerably, more microwave energy can be applied to the soil to achieve weed seed bank deactivation; however, there is growing evidence that this strategy also changes the soil biota and nutrient profile in favour of substantial increases in crop yield, when crops are planted into this microwave-treated soil. An energy application of approximately 400-500 J cm −2 gave approximately 70-80% reduction in weed establishment in three field trials conducted at two agro-ecological zones of the Australia. In addition, there was a 10 times higher nitrogen use efficiency, and a 37% higher water use efficiency was achieved through this aspect of the microwave technology. There is also evidence that the soil treatment strategy provides persistent effects, beyond a single season; therefore, the rice production is better than when using conventional weed control methods.

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Section: Enzyme Activity As a Function Of Microwave Soil Heatingmentioning

confidence: 99%

Microwave Weed and Soil Treatment in Rice Production

Khan¹,

Brodie²

2018

Rice Crop - Current Developments

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“…The in vitro and in vivo data on microwave induced changes in phagocytic funtion [17,22] and in cellular integrity [4,19,20,27] indicate that alterations at either the cellular or subcellular level may result. However, the complexities of biological systems often preclude the determination of site(s) of interactions with microwaves.…”

Section: Discussionmentioning

confidence: 99%

“…Exposure of organisms to microwaves has been reported to affect a variety of biological systems. It has been reported that cells in suspension after exposure to microwave radiation in vitro exhibit funtional changes, including increased permeability of the cell membrane [5], depression of phagocytosis [17], and inhibition of cell growth [19]. In addition, exposure of intact animals has been reported to cause ocular cataracts [15] decreased spermatogenesis [27], and altered phagocytic activity [22].…”

Section: Introductionmentioning

confidence: 99%

Microwave irradiation and in vitro release of enzymes from hepatic lysosomes

Galvin

Parks

McRee

1980

Radiat Environ Biophys

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An exposure system for examining in vitro effects of microwave irradiation on cellular and subcellular components has been developed. The system was used to test the effect of 2.45-GHz CW microwaves on the release of two lysosomal enzymes. At a specific absorption rat (SAR) of 10, 50 or 100 mW/g (90 min) no effects were noted at 37 degrees C (pH of 7.3) on lysosomal fragility as determined by the release of the lysosomal enzymes cathepsin D and beta-glucuronidase. When the medium was adjusted to pH 5.0, microwave irradiation of the lysosomal suspension had no effect on the acid-induced enhancement of release of lysosomal enzymes. The data indicate that microwave irradiation had no labilizing effect on the lysosomal membrane, although other microwave-membrane interactions not associated with enzyme release may occur.

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Effects of 2.45‐GHz microwave radiation on embryonic quail hearts

Galvin

McRee

Lieberman

1980

Bioelectromagnetics

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Although exposure to nonionizing electromagnetic radiation has been reported to cause a variety of systemic alterations during embryonic development, there are few reports of the induction of specific physiology or morphologic changes in the myocardium. This study was designed to examine the effects of microwave radiation on cardiogenesis in Japanese quail embryos exposed during the first eight days of development to 2.45-GHz continuous-wave microwaves at power densities of 5 or 20 mW/cm2. The specific absorption rates were 4.0 and 16.2 mW/g, respectively. The ambient temperature for each exposure was set to maintain the embryonated eggs at 37.5 degree C. This did not preclude thermal gradients in the irradiated embryos since microwaves may not uniformly absorbed. The test exposure levels did not induce changes in either the morphology of the embryonic heart or the ultrastructure of the myocardial cells. Analysis of the enzymatic activities of lactate dehydrogenase, glutamic oxaloacetic transaminase, and creatine phosphokinase failed to reveal any statistically significant differences between the nonexposed controls and those groups exposed to either 5 or 20 mW/cm2. The data indicate that 2.45-GHz microwave radiation at 5 or 20 mW/cm2 has no effect on the measured variables of the Japanese quail myocardium exposed during the first eight days of development.

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Effect of controlled electromagnetic radiation on the growth of cells in tissue culture

Cited by 14 publications

References 16 publications

Microwave Weed and Soil Treatment in Rice Production

Microwave Weed and Soil Treatment in Rice Production

Microwave irradiation and in vitro release of enzymes from hepatic lysosomes

Effects of 2.45‐GHz microwave radiation on embryonic quail hearts

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