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https://www.readbyqxmd.com/read/27913701/considerations-and-challenges-in-the-icrp-dialogues
#1
T Hanzawa
'Yes I tried to explain, but residents couldn't understand …' This was the title of my presentation at the first International Commission on Radiological Protection (ICRP) dialogue seminar in November 2011 held at the Fukushima Prefectural Government office. The accident at Fukushima Daiichi nuclear power plant was triggered by the tsunami caused by the Great East Japan Earthquake of March 2011. Initially, it was thought that Date city, 50-60 km away from the accident, would be safe, but unfortunately this was not the case due to the direction of the wind at the time of the accident...
December 2, 2016: Annals of the ICRP
https://www.readbyqxmd.com/read/27913138/compared-in-vivo-efficiency-of-nanoemulsions-unloaded-and-loaded-with-calixarene-and-soapy-water-in-the-treatment-of-superficial-wounds-contaminated-by-uranium
#2
Sophie Grivès, Guillaume Phan, Céline Bouvier-Capely, David Suhard, François Rebière, Michelle Agarande, Elias Fattal
No emergency decontamination treatment is currently available in the case of radiological skin contamination by uranium compounds. First responders in the workplace or during an industrial nuclear accident must be able to treat internal contamination through skin. For this purpose, a calixarene nanoemulsion was developed for the treatment of intact skin or superficial wounds contaminated by uranium, and the decontamination efficiency of this nanoemulsion was investigated in vitro and ex vivo. The present work addresses the in vivo decontamination efficiency of this nanoemulsion, using a rat model...
November 29, 2016: Chemico-biological Interactions
https://www.readbyqxmd.com/read/27912317/production-of-bacillus-amyloliquefaciens-og-and-its-metabolites-in-renewable-media-valorisation-for-biodiesel-production-and-p-xylene-decontamination
#3
Augusto Etchegaray, François Coutte, Gabrielle Chataigné, Max Béchet, Ramon H Z Dos Santos, Valérie Leclère, Philippe Jacques
Biosurfactants are important in many areas; however, costs impede large-scale production. This work aimed to develop a global sustainable strategy for the production of biosurfactants by a novel strain of Bacillus amyloliquefaciens. Initially, Bacillus sp. strain 0G was renamed B. amyloliquefaciens subsp. plantarum (syn. Bacillus velezensis) after analysis of the gyrA and gyrB DNA sequences. Growth in modified Landy's medium produced 3 main recoverable metabolites: surfactin, fengycin, and acetoin, which promote plant growth...
September 2, 2016: Canadian Journal of Microbiology
https://www.readbyqxmd.com/read/27910909/the-disinfection-characteristics-of-ebola-virus-outbreak-variants
#4
Bradley W M Cook, Todd A Cutts, Aidan M Nikiforuk, Anders Leung, Darwyn Kobasa, Steven S Theriault
The recent Ebola virus outbreak in West Africa has forced experts to re-evaluate their understanding of how to best disinfect areas contaminated with infectious bodily fluids. Recent research has found that Ebola virus remains viable in blood for 7-10 days making appropriate disinfection crucial to infection control. We sought to determine if the three most important outbreak variants of Zaire ebolavirus (Mayinga, Kikwit and Makona) exhibit separate phenotypes when challenged with a range of sodium hypochlorite (NaOCl) concentrations or 70% ethanol (EtOH) at average West African temperature...
December 2, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27905631/-notes-for-a-history-of-hygiene-taken-from-the-bible
#5
Walter Ledermann
Reading once more the Gospels, we found a discussion between Jesus and the Pharisee about the hand washing, this golden rule of medicine, and then, with the help of Thomas Mann, we began a search for other notes on hygiene in the Bible. For the return from Egypt to the Promised Land, Moses established several rules for his people, some of them disguised as religious principles, concerning elimination of excreta, healthy and poisonous foods, isolation in case of contagious diseases (leprosy, gonorrhea), decontamination of clothes and houses, and many others that now seem to us ahead his time...
August 2016: Revista Chilena de Infectología: órgano Oficial de la Sociedad Chilena de Infectología
https://www.readbyqxmd.com/read/27900917/preparation-of-polyelectrolyte-modified-membranes-for-heavy-metal-ions-removal
#6
M A Mokhter, S Lakard, C Magnenet, M Euvrard, B Lakard
Polyethersulfone membranes were modified by polyelectrolyte (PE) multilayers, made of poly(allylamine hydrochloride) with poly(styrene sulfonate), to remove Cu2+, Zn2+ and Ni2+ heavy metal cations from aqueous solutions in a wide range of metal concentration (50-1200 ppm). After characterization of the modified membranes, the efficiency of the process was estimated for single heavy metal ions solution leading to high rejection rates (> 90% for 50 ppm) and good adsorption capacities (7.0-8.5 mg.cm-2) whatever the metal ion tested...
November 30, 2016: Environmental Technology
https://www.readbyqxmd.com/read/27896325/utilization-of-plasmapheresis-for-organophosphate-intoxication-a-case-report
#7
Nezihat Rana Disel, Ayca Acikalin, Zeynep Kekec, Ahmet Sebe
Organophosphate (OP) compounds are extremely toxic chemicals that may be absorbed via skin, conjunctiva, gastrointestinal and respiratory systems. Treatment of OP poisoning is a critical and aggressive process which includes decontamination, antidote administration (atropin and oximes), mechanical ventilation support and extracorporeal elimination procedures if needed. Here we present a young female patient who was unintentionally poisoned by an OP (trichlorfon) after using it to moisture her skin. The importance of this patient is the dermal disease that makes her unprotective to dermal exposure of chemicals and application of plasmapheresis to treat her poisoning...
June 2016: Turkish Journal of Emergency Medicine
https://www.readbyqxmd.com/read/27890334/control-of-carbapenemase-producing-enterobacteriaceae-outbreaks-in-acute-settings-an-evidence-review
#8
REVIEW
C E French, C Coope, L Conway, J P T Higgins, J McCulloch, G Okoli, B C Patel, I Oliver
BACKGROUND: In recent years, infections with carbapenemase-producing Enterobacteriaceae (CPE) have been increasing globally and present a major public health challenge. AIM: To review the international literature: (i) to describe CPE outbreaks in acute hospital settings globally; and (ii) to identify the control measures used during these outbreaks and report on their effectiveness. METHODS: A systematic search of MEDLINE and EMBASE databases, abstract lists for key conferences and reference lists of key reviews was undertaken, and information on unpublished outbreaks was sought for 2000-2015...
October 14, 2016: Journal of Hospital Infection
https://www.readbyqxmd.com/read/27889181/brazilian-cerrado-soil-reveals-an-untapped-microbial-potential-for-unpretreated-polyethylene-biodegradation
#9
Julianna Peixoto, Luciano P Silva, Ricardo H Krüger
Discarded PE-based products pose a social and environmental threat because of their recalcitrance to degradation, a consequence of the unique set of PE's physicochemical properties. In this study we isolated nine novel PE-degrading bacteria from plastic debris found in soil of the savanna-like Brazilian Cerrado. These bacterial strains from the genera Comamonas, Delftia, and Stenotrophomonas showed metabolic activity and cellular viability after a 90-day incubation with PE as the sole carbon source. ATR/FTIR indicated that biodegraded PE undergone oxidation, vinylene formation, chain scission, among other chemical changes...
November 14, 2016: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27889170/drying-parameters-greatly-affect-the-destruction-of-cronobacter-sakazakii-and-salmonella-typhimurium-in-standard-buffer-and-milk
#10
Emilie Lang, Cyril Iaconelli, Fiona Zoz, Stéphane Guyot, Pablo Alvarez-Martin, Laurent Beney, Jean-Marie Perrier-Cornet, Patrick Gervais
Salmonella Typhimurium and Cronobacter sakazakii are two foodborne pathogens involved in neonatal infections from milk powder and infant formula. Their ability to survive in low-moisture food and during processing from the decontamination to the dried state is a major issue in food protection. In this work, we studied the effects of the drying process on Salmonella Typhimurium and Cronobacter sakazakii, with the aim of identifying the drying parameters that could promote greater inactivation of these two foodborne pathogens...
April 2017: Food Microbiology
https://www.readbyqxmd.com/read/27889137/microbial-decontamination-of-onion-powder-using-microwave-powered-cold-plasma-treatments
#11
Jung Eun Kim, Yeong Ji Oh, Mee Yeon Won, Kwang-Sik Lee, Sea C Min
The effects of microwave-integrated cold plasma (CP) treatments against spores of Bacillus cereus and Aspergillus brasiliensis and Escherichia coli O157:H7 on onion powder were investigated. The growth of B. cereus, A. brasiliensis, and E. coli O157:H7 in the treated onion powder was assessed during storage at 4 and 25 °C, along with the physicochemical and sensory properties of the powder. Onion powder inoculated with B. cereus was treated with CP using helium as a plasma-forming gas, with simultaneous exposure to low microwave density at 170 mW m(-2) or high microwave density at 250 mW m(-2)...
April 2017: Food Microbiology
https://www.readbyqxmd.com/read/27886986/decontamination-and-recovery-of-a-nuclear-facility-to-allow-continued-operation
#12
Josh Cavaghan
A power supply failure caused a loss of power to key ventilation systems in an operating nuclear facility. The in-cell depression was lost, which led to an egress of activity through prepared areas and into the normal operating areas. After an initial programme of radiological monitoring to quantify and categorise the activity in the operating areas, a plan was developed for the decontamination and remediation of the plant. The scope of the recovery plan was substantial and featured several key stages. The contamination was almost entirely (137)Cs, reflecting the α:β/γ ratio for the facility...
November 24, 2016: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/27885089/slaying-the-dragon-the-story-of-one-fpso-20-vietnamese-operators-and-3-concrete-mixers
#13
Anthony O'Brien, Annelize van Rooyen
End of life of a floating production, storage and offloading (FPSO) facility requires a lot of planning and management. One of the major challenges is the issue of decontamination and waste management. Waste disposal is a very sensitive subject and with agreements like the London Protocol and differences in legislation between countries, it has the potential to become a major stumbling block. Radiation safety is something not often on the mind of an FPSO operator. The planning and layout of such a vessel and its processing plant have usually not gone through any as low as reasonably achievable process during design...
November 24, 2016: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/27884531/using-groundwater-age-distributions-to-understand-changes-in-methyl-tert-butyl-ether-mtbe-concentrations-in-ambient-groundwater-northeastern-united-states
#14
Bruce D Lindsey, Joseph D Ayotte, Bryant C Jurgens, Leslie A Desimone
Temporal changes in methyl tert-butyl ether (MtBE) concentrations in groundwater were evaluated in the northeastern United States, an area of the nation with widespread low-level detections of MtBE based on a national survey of wells selected to represent ambient conditions. MtBE use in the U.S. peaked in 1999 and was largely discontinued by 2007. Six well networks, each representing specific areas and well types (monitoring or supply wells), were each sampled at 10year intervals between 1996 and 2012. Concentrations were decreasing or unchanged in most wells as of 2012, with the exception of a small number of wells where concentrations continue to increase...
November 21, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27878901/radioactive-cesium-and-potassium-in-cattle-living-in-the-zone-in-preparation-for-the-lifting-of-the-evacuation-order-of-the-fukushima-nuclear-accident
#15
Itaru Sato, Jun Sasaki, Hiroshi Satoh, Takahisa Murata, Kumiko Otani, Keiji Okada
To contribute to the reconstruction of livestock industry in Fukushima, radioactive cesium ((134) Cs, (137) Cs) and potassium ((4) °K) were measured in various tissues of beef cattle living in an area where the evacuation order will be lifted in the near future. Radioactive cesium concentration was less than 100 Bq/kg in most of the samples. Skeletal muscles and kidney had the highest concentrations of radioactive cesium, whereas the liver was lowest among samples, excepting blood. Radioactive cesium concentration in the sirloin, tenderloin and top round was significantly higher than that in the neck muscle...
November 23, 2016: Animal Science Journal, Nihon Chikusan Gakkaihō
https://www.readbyqxmd.com/read/27876160/an-analysis-of-the-radioactive-contamination-due-to-radon-in-a-granite-processing-plant-and-its-decontamination-by-ventilation
#16
Pedro M Dieguez-Elizondo, Tomas Gil-Lopez, Paul G O'Donohoe, Juan Castejon-Navas, Miguel A Galvez-Huerta
This work focuses on studying concentration distribution of (222)Rn radioisotope in a granite processing plant. Using Computational Fluid Dynamic Techniques (CFD), the exposure of the workers to radiation was assessed and, in order to minimise this exposure, different decontamination scenarios using ventilation were analysed. Natural ventilation showed not sufficient to maintain radon concentration below acceptable limits, so a forced ventilation was used instead. Position of the granite blocks also revealed as a determining factor in the radioactive level distribution...
November 18, 2016: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/27866755/evaluation-of-an-automated-room-decontamination-device-using-aerosolized-peracetic-acid
#17
Thriveen S C Mana, Brett Sitzlar, Jennifer L Cadnum, Annette L Jencson, Sreelatha Koganti, Curtis J Donskey
Because manual cleaning is often suboptimal, there is increasing interest in use of automated devices for room decontamination. We demonstrated that an ultrasonic room fogging system that generates submicron droplets of peracetic acid and hydrogen peroxide eliminated Clostridium difficile spores and vegetative pathogens from exposed carriers in hospital rooms and adjacent bathrooms.
November 18, 2016: American Journal of Infection Control
https://www.readbyqxmd.com/read/27866621/biogenic-fes-accelerates-reductive-dechlorination-of-carbon-tetrachloride-by-shewanella-putrefaciens-cn32
#18
Ying-Chao Huo, Wen-Wei Li, Chang-Bin Chen, Chen-Xuan Li, Raymond Zeng, Tai-Chu Lau, Tian-Yin Huang
Dissimilatory metal reducing bacteria (DMRB) widely exist in the subsurface environment and are involved in various contaminant degradation and element geochemical cycling processes. Recent studies suggest that DMRB can biosynthesize metal nanoparticles during metal reduction, but it is unclear yet how such biogenic nanomaterials would affect their decontamination behaviors. In this study, we found that the dechlorination rates of carbon tetrachloride (CT) by Shewanella putrefaciens CN32 was significantly increased by 8 times with the formation of biogenic ferrous sulfide (FeS) nanoparticles...
December 2016: Enzyme and Microbial Technology
https://www.readbyqxmd.com/read/27866468/intratubular-disinfection-with-tri-antibiotic-and-calcium-hydroxide-pastes
#19
Thais Cristina Pereira, Layla Reginna Silva Munhoz De Vasconcelos, Marcia Sirlene Zardin Graeff, Marco Antonio Hungaro Duarte, Clóvis Monteiro Bramante, Flaviana Bombarda De Andrade
OBJECTIVE: The aim of this study was to compare the in vitro intradentinal antimicrobial ability of the calcium hydroxide and tri-antibiotic pastes. MATERIALS AND METHODS: Standard bovine dentin tubes were sterilized and then infected with Enterococcus faecalis by a new contamination protocol of great depths of dentin. The specimens were filled with the medications, divided into two test-groups: calcium hydroxide (Group 1) and tri-antibiotic (Group 2) pastes. After 15 days, the teeth were evaluated by microbiological culture and confocal laser scanning microscopy (CLSM) with viability dye assay LIVE/DEAD inside dentinal tubules...
November 21, 2016: Acta Odontologica Scandinavica
https://www.readbyqxmd.com/read/27866000/effectiveness-of-final-decontamination-protocols-against-enterococcus-faecalis-and-its-influence-on-bond-strength-of-filling-material-to-root-canal-dentin
#20
Matheus Albino Souza, Daniel Dalla Lana, Ezequiel Gabrielli, Marlos Barbosa Ribeiro, Daniela Cristina Miyagaki, Doglas Cecchin
AIM: The aim of this study was to evaluate the effectiveness of final decontamination protocols against Enterococcus faecalis and their influence on bond strength of filling material to root canal dentin. MATERIAL AND METHODS: Ninety root canals were enlarged with ProTaper system and inoculated with E. faecalis for 15 days. Sixty samples were randomly divided into six groups (n=10) and subjected to following protocols: G1-distilled water(control), G2-2% chlorhexidine, G3-QMix, G4-6...
November 16, 2016: Photodiagnosis and Photodynamic Therapy
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