Relevant factors affecting microbial surface decontamination by pulsed light.

01:51 EDT 30th August 2015 | BioPortfolio

Summary of "Relevant factors affecting microbial surface decontamination by pulsed light."

Pulsed Light (PL) uses intense flashes of white light rich in ultraviolet (UV) light for decontamination. A log-reduction higher than 5 was obtained in one flash and at fluences lower than 1.8J/cm(2) on spores of a range of spore-forming bacteria, of vegetative cells of non-spore-forming bacteria and on yeasts spread on agar media. Vegetative cells were more sensitive than spores. The inactivation by PL of Bacillus subtilis, B. atrophaeus, B. cereus, Geobacillus stearothermophilus, and Aspergillus niger spores sprayed on polystyrene was similar. The inactivation by PL of B. subtilis and A. niger spores sprayed on glass was slightly lower than on polystyrene. No alteration of the spore structures was detected by scanning electron microscopy for both PL treated B. subtilis and A. niger spores. The inactivation of spores of B. subtilis, B. atrophaeus, B. cereus and B. pumilus by PL or by continuous UV-C at identical fluences was not different, and was much higher by PL for A. niger spores. The increase in the input voltage of the lamps (which also increases the UV-C %) resulted in a higher inactivation. There was no correlation between the resistance to heat and the resistance to PL. The relative effect of UV-C radiations and light thermal energy on PL inactivation was discussed.


CLARANOR S.A, Chemin de la Rollande, Agroparc, BP 21 531, F-84916 Avignon cedex 9, France; INRA, UMR408 Sécurité et qualité des produits d'origine végétale, F-84000 Avignon, France; Université d'Avignon et des pays de Vaucluse, UMR 408 Sécurité et

Journal Details

This article was published in the following journal.

Name: International journal of food microbiology
ISSN: 1879-3460
Pages: 168-74


PubMed Articles [27796 Associated PubMed Articles listed on BioPortfolio]

Pulsed light induced damages in Listeria innocua and Escherichia coli.

Pulsed light (PL) is an upcoming non-thermal decontamination technology mainly for surface sterilization. The objective of this study was to investigate the extent of cellular damage caused by PL trea...

Aflatoxin M1: Prevalence and decontamination strategies in milk and milk products.

Aflatoxin M1 (AFM1) in milk is among the most carcinogenic compounds, relatively high levels being consumed, especially by the most vulnerable age groups, i.e. infants and the elderly. Reports on its ...

Pulsed Light Decontamination of Endive Salad and Mung Bean Sprouts and Impact on Color and Respiration Activity.

The objective of this study was the determination of the efficiency of pulsed light (PL) treatments for the decontamination of endive salad and mung bean sprouts, as well as the assessment of quality ...

A split-face comparison of facial hair removal with the long pulsed Alexandrite Laser and intense pulsed light system.

Undesirable hair growth presents a significant problem for many patients. Photoepilation has become a very popular procedure in aesthetic and cosmetic practice. Among the systems used are the long pul...

Complete surface coverage of ZnO nanorod arrays by pulsed electrodeposited CuInS2 for visible light energy conversion.

Well-aligned ZnO nanorods were uniformly coated with a layer of CuInS2 nanoparticle photosensitizers using a tailored sequential pulsed electrodeposition. The formation of CuInS2-ZnO heterojunction wi...

Clinical Trials [3074 Associated Clinical Trials listed on BioPortfolio]

Treatment of Naevus Flammeus Using Intense Pulsed Light and Pulsed Dye Laser

The purpose of the trial is to compare efficacy and adverse effects of pulsed dye laser and intense pulsed light in patients with port wine stains.

Long-Pulsed Dye Laser and Intense Pulsed Light for Skin Rejuvenation.

The purpose of the trial is to compare clinical efficacy and occurrence of side effects in the treatment of photodamaged skin with Pulsed Dye Laser and Intense Pulsed Light.

Pulsed Dye Laser and Intense Pulsed Light (IPL) for the Treatment of Telangiectasia and Skin Redness

The purpose of the study is to compare efficacy and adverse effects of pulsed dye laser and intense pulsed light in patients with skin telangiectasia and redness.

Combined Photodynamic and Pulsed Dye Laser Treatment of Port Wine Stains

This research study was designed to determine the effect on port wine stains (PWS) of liposomal benzoporphyrin derivative monoacid (BPD-MA) termed verteporfin (distributed for medical indi...

Modeling Genotype and Other Factors to Enhance the Safety of Coumadin Prescribing

The study goal is to conduct a randomized controlled trial to compare safety and accuracy of dosing based on clinical information including the clinical reason for your taking coumadin, yo...

Medical and Biotech [MESH] Definitions

Light absorbing proteins and protein prosthetic groups found in certain microorganisms. Some microbial photoreceptors initiate specific chemical reactions which signal a change in the environment, while others generate energy by pumping specific ions across a cellular membrane.

The sequential activation of serum COMPLEMENT PROTEINS to create the COMPLEMENT MEMBRANE ATTACK COMPLEX. Factors initiating complement activation include ANTIGEN-ANTIBODY COMPLEXES, microbial ANTIGENS, or cell surface POLYSACCHARIDES.

Abnormal responses to sunlight or artificial light due to extreme reactivity of light-absorbing molecules in tissues. It refers almost exclusively to skin photosensitivity, including sunburn, reactions due to repeated prolonged exposure in the absence of photosensitizing factors, and reactions requiring photosensitizing factors such as photosensitizing agents and certain diseases. With restricted reference to skin tissue, it does not include photosensitivity of the eye to light, as in photophobia or photosensitive epilepsy.

Chemical substances that attract or repel cells. The concept denotes especially those factors released as a result of tissue injury, microbial invasion, or immunologic activity, that attract LEUKOCYTES; MACROPHAGES; or other cells to the site of infection or insult.

A multifactorial disease of CATTLE resulting from complex interactions between environmental factors, host factors, and pathogens. The environmental factors act as stressors adversely affecting the IMMUNE SYSTEM and other host defenses and enhancing transmission of infecting agents.


Searches Linking to this Article