Effect of culture temperature on high-voltage pulse sterilization of Escherichia coli

Ohshima, Takayuki; Okuyama, Kanako; Sato, Masayuki

doi:10.1016/s0304-3886(01)00206-6

Cited by 84 publications

(49 citation statements)

References 11 publications

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“…The effects of in-liquid plasma are expected to be thermal effects in addition to those effects emanating from the generated oxidative active species (cOOH and cOH radicals). As an example, the effect of culture temperature of Escherichia coli on pulsed electric eld (PEF) sterilization has been studied by Ohshima and coworkers,230 who noted that the sterilization efficiency depends on the culture temperature of the E. coli bacteria and that the efficiency of PEF sterilization is inuenced by the PEF treatment temperature. Moreover, insofar as the bactericidal effect of oxidative active species generated from plasmas in underwater streamer discharge liquids is concerned, sterilization is affected more by the stable hydrogen peroxide produced later in water than by the effect of cOH species.…”

Section: Wastewater Treatmentsmentioning

confidence: 99%

In-liquid plasma: a novel tool in the fabrication of nanomaterials and in the treatment of wastewaters

2017

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Attempts to generate plasma in liquids have been successful and various devices have been proposed. Many reports have described the optimal conditions needed to generate plasma, and mechanisms have been inferred, together with the composition of the plasma. Elucidation of a stable method (and mechanism) to generate plasma in liquids has led to various active investigations into applications of this new energy source. This review article describes the generator and the generation mechanism of in-liquid plasma, and pays attention to the evolving technology. The characteristics of submerged plasma are summarized and examples of nanomaterials syntheses and wastewater treatment are given, both of which have attracted significant attention. Extreme reaction fields can be produced conveniently using electrical power even without the use of chemical substances and high-temperature high-pressure vessels. Chemical reactions can be carried out and environmental remediation processes achieved with high efficiency and operability with the use of in-liquid plasma. Suggestions for introducing in-liquid plasma to chemical processes are discussed.

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Section: Wastewater Treatmentsmentioning

confidence: 99%

In-liquid plasma: a novel tool in the fabrication of nanomaterials and in the treatment of wastewaters

2017

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“…PEF suffers from some disadvantages such as being ineffective on enzymes and spores, adverse effects on foods, and certain safety concerns in local processing environments [41]. The lethal effect of PEF treatment is dependent on the electric field strength and treatment time and bacterial features [42,43]. Gudmundsson and Hafsteinsson [44] reported that PEF treatment of meat and fish was not suitable for preservation because it affected the texture and microstructure at lower field voltage than effectively reducing bacterial growth.…”

Section: Pulsed Electric Fields (Pef)mentioning

confidence: 99%

Novel Approaches in Seafood Preservation Techniques

Özoğul

Küley

2010

Handbook of Seafood Quality, Safety and Health Applications

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Seafood plays an important role in human diet and is considered not only a reliable source of protein, but also of nutritional significance due to its lipid, vitamin, and mineral constituents. Thus, these constituents are important in consumers' interest in fish products due to the nutritional value and health-promoting characteristics of seafood. However, seafoods are perishable products and the shelf-life is limited in the presence of air and atmospheric oxygen (O 2 ), which also lead to the growth of aerobic spoilage micro-organisms. Hence, preservation of the fresh quality of seafood is essential. Preservation techniques are designed to inhibit or reduce the metabolic changes that lead to fish quality deterioration. Many different techniques have been used to prolong the shelf-life of seafoods and these techniques are based on the control of temperature, water activity, microbial loads, and the available oxygen. This chapter focuses on novel preservation techniques in seafoods. Seafood preservation techniques Modified atmosphere packaging (MAP)MAP is a form of packaging involving the removal of air from the pack and its replacement with a single gas or a mixture of gases. MAP has become an increasingly popular preservation technique in seafood distribution and marketing to meet consumer demands. MAP techniques are now used in a wide range of applications in food products, including raw and cooked red meats, poultry, fruit, fresh pasta, crisps, coffee, tea, vegetables, cheese, bread, fish, and crustaceans, etc. [1].MAP, together with refrigeration, is capable of extending the shelf-life of fish and shellfish. Modification of the atmosphere within the package by decreasing the oxygen concentration while increasing the content of carbon dioxide (CO 2 ) and/or nitrogen (N 2 ) has been shown to significantly prolong the shelf-life of perishable food products at chill temperatures. However, undoubtedly the single most important concern with the use of MAP products is the potential for the outgrowth and toxin production by the non-proteolytic, Clostridium botulinum type Handbook of Seafood Q uality, Safety and Health ApplicationsEdited by Cesarettin Alasalvar, Fereidoon Shahidi, Kazuo Miyashita and Udaya Wanasundara

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“…In addition to the temperature of PEF treatment, the effect of growth temperature of bacteria on PEF sterilization has been studied. Ohshima et al demonstrated that the efficiency of PEF sterilization depends on the growth temperature of the target bacteria by using E. coli [15]. E. coli cells were cultivated at 20°C, 30°C, 37°C, or 42°C, and subjected to PEF sterilization.…”

Section: Introductionmentioning

confidence: 99%

Bacterial Sterilization and Intracellular Protein Release by a Pulsed Electric Field

Oshima

Sato²

2004

Recent Progress of Biochemical and Biomedical Engineering in Japan I

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Effect of culture temperature on high-voltage pulse sterilization of Escherichia coli

Cited by 84 publications

References 11 publications

In-liquid plasma: a novel tool in the fabrication of nanomaterials and in the treatment of wastewaters

In-liquid plasma: a novel tool in the fabrication of nanomaterials and in the treatment of wastewaters

Novel Approaches in Seafood Preservation Techniques

Bacterial Sterilization and Intracellular Protein Release by a Pulsed Electric Field

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