Mechanism of lethal action of 2,450-MHz radiation on microorganisms

Vela, G. R.; Wu, Jie

doi:10.1128/aem.37.3.550-553.1979

Cited by 106 publications

(36 citation statements)

References 12 publications

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“…Their use was mentioned by only one centre surveyed here, which used a microwave oven only for reheating cooked food. Microbes may only be inactivated in the presence of water, so dry foods may not be cooked effectively by microwave (Vela & Wu, 1979). In addition, Page & Martin (1978) found that the survival of Escherichia coli and Streptococcus cerevisiae on the inner surfaces of a microwave oven was high when compared with the same organisms in food.…”

Section: Discussionmentioning

confidence: 99%

Review of current practice in ‘clean’ diets in the UK

Pattison

1993

J Human Nutrition Diet

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A survey of current practice in the provision of ‘clean’ diets at UK bone‐marrow transplant (BMT) centres was carried out as a basis for updating the information given to patients at Sheffield Children's Hospital (SCH). ‘Clean’ diets are used to minimize the risk of infection from food in immuno‐suppressed patients. Information received varied greatly from sterile diets to modified ward diets. It was found difficult to collate the results for this reason. In addition, there has been little documented evidence on the use and effectiveness of these diets. In general, there appears to be a move away from a stringent sterile diet towards a more relaxed diet, giving patients a greater choice of foods. Following this survey, the information given to BMT patients at SCH was modified to allow greater freedom of choice, whilst maintaining sensible food hygiene guidelines.

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Section: Discussionmentioning

confidence: 99%

Review of current practice in ‘clean’ diets in the UK

Pattison

1993

J Human Nutrition Diet

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“…More recent work by other researchers (Goldblith and Wan 1967; Lechowich el ul. 1969; Craven and Lilliard 1974;Vela and Wu 1979;Welt et al 1994), however, indicates that the bactericidal effect is due solely to heat produced by the microwave irradiation. These effects could correspond to the capacity of the microwave in transfering energy to the material and would cause the temperature increase.…”

Section: Resultsmentioning

confidence: 99%

EFFECT OF MICROWAVE HEATING ON SURVIVAL OF SALMONELLA TYPHIMURIUM IN ARTIFICIALLY CONTAMINATED READY‐TO‐EAT FOODS

Tassinari

Landgraf

1997

Journal of Food Safety

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This research evaluated the destruction of Salmonella typhimurium during reheating of foods in two different types of microwave ovens: a conventional 750W oven and 700W oven with preset controls. The heating times in the conventional microwave oven were established as 50 s for baby food and 75 s for mashed potatoes as well as for the beef stroganoff samples, while for the preset oven those periods of time were determined by a built‐in temperature sensor. The percentage of food samples positive for S. typhimurium in conventional microwave was 47.8% while in microwave with preset controls it was 93.3%. Our results suggest that reheating contaminated foods in microwave ovens may, therefore, not be sufficient to destroy S. thyphimurium in order to assure food safety.

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“…In the first experiment, soil samples containing seeds germinated in an outdoor greenhouse, whereas in the second one, seeds were placed in a growth chamber with optimal germination conditions. Raising soil temperature by microwave treatment also potentially affects soil-living organisms and soil abiotic properties (Barker et al 1972;Vela & Wu 1979;Brodie et al 2015). Such disturbances can indirectly impact seedling emergence (Dawson et al 1965).…”

Section: Discussionmentioning

confidence: 99%

Microwave soil heating reduces seedling emergence of a wide range of species including invasives

Hess

Wilde

Yavercovski

et al. 2018

Restoration Ecology

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A microwave‐based process to control invasive species (seeds and adult stages) in the field prior to plant community restoration is currently under development. We investigated the effect of four microwave treatment pairings of Power × Duration (2kW4min, 4kW2min, 2kW8min, and 4kW4min) on seedling emergence of (1) an abandoned field seed bank used as a model for various plant species and (2) seeds of three species invasive in Europe: Datura stramonium (Jimson weed), Reynoutria × bohemica (Bohemian knotweed), and Solidago gigantea (Giant goldenrod). In addition, we assessed whether nontreated seeds of these three invasive species could germinate on microwave‐treated soils. As microwave soil heating usually leads to nonhomogeneous temperatures within a sample, we also assessed whether the position of seeds in the soil during microwave treatment (center vs. edges) impacted seedling emergence. Results show that the most intensive microwave treatments (2kW8min and 4kW4min), enabling the soil to reach 85°C, are highly effective in inhibiting seedling emergence of invasive species and the seed bank. The 2kW8min treatment, combining lowest power and longest exposure, is the most effective, reducing seed bank seedling emergence by 98% compared to control. The results also reveal a species‐specific response to heat, and lower microwave effectiveness on seeds located at the soil surface, which may explain the incomplete effectiveness of intensive treatments. Our results also suggest that prior microwave soil treatment does not prevent a considerable proportion of newly arrived invasive species seeds from germinating, suggesting that this method should be followed by restoration of native plant cover.

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Mechanism of lethal action of 2,450-MHz radiation on microorganisms

Cited by 106 publications

References 12 publications

Review of current practice in ‘clean’ diets in the UK

Review of current practice in ‘clean’ diets in the UK

EFFECT OF MICROWAVE HEATING ON SURVIVAL OF SALMONELLA TYPHIMURIUM IN ARTIFICIALLY CONTAMINATED READY‐TO‐EAT FOODS

Microwave soil heating reduces seedling emergence of a wide range of species including invasives

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