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https://www.readbyqxmd.com/read/29792942/optimisation-of-decontamination-method-and-influence-of-culture-media-on-the-recovery-of-mycobacterium-avium-subspecies-paratuberculosis-from-spiked-water-sediments
#1
G Aboagye, M T Rowe
The recovery of Mycobacterium avium subspecies paratuberculosis (Map) from the environment can be a laborious process - owing to Map being fastidious, its low number, and also high numbers of other microbial populations in such settings. Protocols i.e. filtration, decontamination and modified elution were devised to recover Map from spiked water sediments. Three culture media: Herrold's Egg Yolk Media (HEYM), Middlebrook 7H10 (M-7H10) and Bactec 12B were then employed to grow the organism following its elution...
May 21, 2018: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/29791399/highly-efficient-in-situ-oxidization-of-metal-ions-in-porous-media-with-high-power-laser
#2
Wenjun Zheng, Negar H Golshan, Sue-Jonnathane Celestin, Katherine S Ziemer, Ming Su
Metal ions in ground are hard to remove and constitute a serious environmental challenge. This paper reports a new laser-based method for in situ soil decontamination at high efficiency, in which a focused CO2 laser is used to oxidize metal contaminants from soil and fuse them with silica (base materials of soil), thus preventing undesired transport of metal ions within soil. Three types of metal ions (copper, nickel, and cadmium) adsorbed on porous silica plates are exposed to continuous laser irradiation...
May 20, 2018: Applied Optics
https://www.readbyqxmd.com/read/29787444/french-policies-for-victim-management-during-mass-radiological-accidents-attacks
#3
Diane Riccobono, Marco Valente, Michel Drouet, Franck Calamai, Amandine Abriat
In the current international context, emergency medical services have to be prepared for chemical, biological, radiological, and nuclear events. Emergency response to radiological or nuclear events requires coordination between many components: the fire brigade, emergency medical services (including nurses and physicians), police, hospitals, etc. To optimize efficiency, victim management in France is governed by specific policies and planned responses. This plan for radiological/nuclear event response is inspired by military chemical, biological, radiological, and nuclear victim management in the operational theatre and is based on extraction (removal to a safe environment), first triage, decontamination, second triage, treatment, substance identification, and training...
July 2018: Health Physics
https://www.readbyqxmd.com/read/29787431/rapid-response-dose-assessment-and-clinical-management-of-a-plutonium-contaminated-puncture-wound
#4
Stephen L Sugarman, William M Findley, Richard E Toohey, Nicholas Dainiak
Internalization of radionuclides occurs not only by inhalation, ingestion, parenteral injection (i.e., administration of radioactive material for a medical purpose), and direct transdermal absorption, but also by contaminated wounds. In June 2010, a glove-box operator at the U.S. Department of Energy's Savannah River Site sustained a puncture wound while venting canisters containing legacy materials contaminated with Pu. To indicate the canisters had been vented, a flag was inserted into the vent hole. The shaft of the flag penetrated the protective gloves worn by the operator...
July 2018: Health Physics
https://www.readbyqxmd.com/read/29787426/actinide-contaminated-skin-comparing-decontamination-efficacy-of-water-cleansing-gels-and-dtpa-gels
#5
A Tazrart, M A Bolzinger, S Lamart, S Coudert, J F Angulo, V Jandard, S Briançon, N M Griffiths
Skin contamination by alpha-emitting actinides is a risk to workers during nuclear fuel production and reactor decommissioning. Also, the list of items for potential use in radiological dispersal devices includes plutonium and americium. The actinide chemical form is important and solvents such as tributyl phosphate, used to extract plutonium, can influence plutonium behavior. This study investigated skin fixation and efficacy of decontamination products for these actinide forms using viable pig skin in the Franz cell diffusion system...
July 2018: Health Physics
https://www.readbyqxmd.com/read/29786860/effect-of-cold-plasma-on-maintaining-the-quality-of-chub-mackerel-scomber-japonicus-biochemical-and-sensory-attributes
#6
Jing Chen, Sheng-Zhe Wang, Jun-Yu Chen, Dong-Zhi Chen, Shang-Gui Deng, Bin Xu
BACKGROUND: Atmospheric cold plasma (ACP) has emerged as a potential alternative to traditional methods for non-thermal food decontamination. However, little data are available about ACP treatment for seafood. In this study, dielectric barrier discharge (DBD) was applied to generate CP, and the aim of the study was to investigate the effectiveness of DBD-ACP on improving the quality of chub mackerel on the basis of chemical, microbial, and sensory characteristics. RESULTS: The effect of DBD-ACP on the quality of chub mackerel (Scomber japonicus) during storage was examined...
May 21, 2018: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/29786164/air-activated-self-decontaminating-polydicyclopentadiene-polyhipe-foams-for-rapid-decontamination-of-chemical-warfare-agents
#7
Christopher L McGann, Grant C Daniels, Spencer L Giles, Robert B Balow, Jorge L Miranda-Zayas, Jeffrey G Lundin, James H Wynne
The threat of chemical warfare agents (CWA) compels research into novel self-decontaminating materials (SDM) for the continued safety of first-responders, civilians, and active service personnel. The capacity to actively detoxify, as opposed to merely sequester, offending agents under typical environmental conditions defines the added value of SDMs in comparison to traditional adsorptive materials. Porous polymers, synthesized via the high internal phase emulsion (HIPE) templating, provide a facile fabrication method for materials with permeable open cellular structures that may serve in air filtration applications...
May 22, 2018: Macromolecular Rapid Communications
https://www.readbyqxmd.com/read/29785903/high-intensity-light-pulses-to-reduce-microbial-load-in-fresh-cheese
#8
Valentina Lacivita, Amalia Conte, James G Lyng, Cristina Arroyo, Vittorio A Zambrini, Matteo A Del Nobile
The present study focused on the utilisation of High Intensity Light Pulses (HILP) treatment to preserve mozzarella cheese. First, the susceptibility of Pseudomonas fluorescens and Enterobacteriaceae to HILP (fluences from 0·39 to 28·0 J/cm2) in a transparent liquid was evaluated (in-vitro tests). Afterwards, the effects on inoculated mozzarella cheese were also assessed. Then untreated (Control) and HILP treated samples were packaged and stored at 10 °C for 2 weeks. Enterobacteriaceae, Pseudomonas spp. and pH were monitored during storage...
May 2018: Journal of Dairy Research
https://www.readbyqxmd.com/read/29781303/lavandula-x-intermedia-and-lavandula-angustifolia-essential-oils-phytochemical-composition-and-antimicrobial-activity-against-foodborne-pathogens
#9
Roberta Tardugno, Annalisa Serio, Federica Pellati, Serena D'Amato, Clemencia Chaves López, Maria Grazia Bellardi, Maura Di Vito, Vincenzo Savini, Antonello Paparella, Stefania Benvenuti
Four cultivars (cv) of Lavandula x intermedia ('Abrialis', 'Alba', 'Rinaldi Ceroni' (R.C.) and 'Sumiens') were cultivated in Italy and their essential oils (EOs) were distilled from Alfalfa Mosaic Virus-free plants. These EOs and one from L. angustifolia Miller were chemically characterised by GC-MS and GC-FID. Antimicrobial activity was evaluated against Listeria monocytogenes (24 strains) and Salmonella enterica (10 food strains). Minimal inhibitory concentrations (MIC) ≥ 10.0 μL/mL inhibited Salmonella (cv 'R...
May 21, 2018: Natural Product Research
https://www.readbyqxmd.com/read/29781059/water-decontamination-containing-nitrate-using-biosorption-with-moringa-oleifera-in-dynamic-mode
#10
Rebecca Manesco Paixão, Isabela Maria Reck, Raquel Guttierres Gomes, Rosângela Bergamasco, Marcelo Fernandes Vieira, Angélica Marquetotti Salcedo Vieira
This study was conducted to assess the feasibility of using Moringa oleifera Lam. (MO) seeds in the biosorption of nitrate present in aqueous solutions by means of batch and fixed-bed column biosorption processes. The batch assays showed that nitrate biosorption is enhanced under experimental conditions of pH 3 and a biosorbent mass of 0.05 g. For the experiments in dynamic mode, the results obtained from the statistical parameters showed that lesser pH, lesser feed flow rate, and higher initial concentration will result in an increase of the maximum capacity of the bed...
May 20, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29779774/the-impact-of-repeated-nalc-naoh-decontamination-on-the-performance-of-xpert-mtb-rif-assay
#11
Andrea Rachow, Elmar Saathoff, Bariki Mtafya, Daniel Mapamba, Chacha Mangu, Gabriel Rojas-Ponce, Nyanda E Ntinginya, Martin Boeree, Norbert Heinrich, Stephen H Gillespie, Michael Hoelscher
The Xpert MTB/RIF assay detects Mycobacterium tuberculosis in unprocessed or NALC/NaOH- decontaminated sputum. The effect of repeated NALC/NaOH-decontamination on several Xpert performance parameters was assessed in this study. A second NALC/NaOH-decontamination had no effect on the binary Xpert-outcome but increased the value for the quantitative readout (CTmin ). Repeated decontamination was not associated with PCR-inhibition or invalid results. The CTmin of M.tb positive samples was higher in inhibited Xpert runs...
May 2018: Tuberculosis
https://www.readbyqxmd.com/read/29778156/preparation-and-characterization-of-a-novel-hybrid-chelating-material-for-effective-adsorption-of-cu-ii-and-pb-ii
#12
Ya Liu, Peng Qian, Yang Yu, Bo Yu, Yongliang Wang, Shufeng Ye, Yunfa Chen
The discharge of heavy metal ions such as Cu2+ and Pb2+ poses a severe threat to public health and the environment owing to their extreme toxicity and bioaccumulation through food chains. Herein, we report a novel organic-inorganic hybrid adsorbent, Al(OH)3 -poly(acrylamide-dimethyldiallylammonium chloride)-graft-dithiocarbamate (APD), for rapid and effective removal of Cu2+ and Pb2+ . In this adsorbent, the "star-like" structure of Al(OH)3 -poly(acrylamide-dimethyldiallylammonium chloride) served as the support of dithiocarbamate (DTC) functional groups for easy access of heavy metal ions and assisted development of large and compact floccules...
May 2018: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/29778145/impact-of-density-of-coating-agent-on-antibacterial-activity-of-silver-nanoparticle-impregnated-plasma-treated-activated-carbon
#13
Pritam Biswas, Rajdip Bandyopadhyaya
To use stabilized nanoparticles (NPs) in water as disinfectants over a very long period, the amount of coating agent (for NP stabilization) needs to be optimized. To this end, silver nanoparticles (Ag-NPs) with two different coating densities of tri-sodium citrate (12.05 and 46.17molecules/nm2 , respectively), yet of very similar particle size (29 and 27 nm, respectively) were synthesized. Both sets of citrate capped NPs were then separately impregnated on plasma treated activated carbon (AC), with similar Ag loading of 0...
May 2018: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/29775099/the-use-of-olive-tree-pruning-waste-compost-to-sequestrate-methylene-blue-dye-from-aqueous-solution
#14
Ioannis Anastopoulos, Ilias Margiotoudis, Ioannis Massas
Considering that quality water supplies are diminishing and climate disorder affects water cycle, wastewaters should be decontaminated for reuse either by the same establishment or in agriculture for the growth of industrial plants. In that context, much research work has been focused on the development of low cost biosorbents. In this study, the effect of composting on the adsorption capacity of olive tree pruning waste (OTPW) biomass for methylene blue (MB) removal from aqueous solutions was examined. Composting procedure may improve the sorption properties of the raw organic materials, is economical and easy to apply...
July 3, 2018: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/29774550/efficacy-of-vaporized-hydrogen-peroxide-for-repeated-sterilization-of-a-single-use-single-incision-laparoscopic-surgery-port
#15
Valery F Scharf, Brian Dent, Megan E Jacob, Brandon Moore
OBJECTIVE: To determine the ability of vaporized hydrogen peroxide (VHP) to sterilize a single-use single-incision laparoscopic surgery port and its associated components after repeated simulated uses. STUDY DESIGN: Prospective in vitro experimental study. SAMPLE POPULATION: Six single-use single-incision laparoscopic surgery ports with associated cannulas and insufflation tubing. METHODS: Ports, cannulas, and tubing were subjected to 10 cycles of simulated use, bacterial inoculation with Staphylococcus pseudintermedius and Escherichia coli, decontamination and sterilization, and testing via culture based on their treatment group designation...
May 17, 2018: Veterinary Surgery: VS
https://www.readbyqxmd.com/read/29767434/regenerative-surgical-therapy-for-peri-implantitis-using-deproteinized-bovine-bone-mineral-with-10-collagen-enamel-matrix-derivative-and-doxycycline-a-prospective-3-year-cohort-study
#16
Faustino Mercado, Stephen Hamlet, Saso Ivanovski
OBJECTIVES: There is limited evidence regarding the long-term efficacy of regenerative treatment for peri-implantitis. The aim of this study was to evaluate a combination therapy of deproteinized bovine bone mineral with 10% collagen (DBBMC), enamel matrix derivative (EMD) and Doxycycline in the regeneration of bone defects associated with peri-implantitis. METHODS: Thirty patients diagnosed with peri-implantitis (BoP/suppuration, probing depth greater than 4 mm, minimum radiographic bone loss of 20%, at least 2 years in function) were enrolled in the study...
May 16, 2018: Clinical Oral Implants Research
https://www.readbyqxmd.com/read/29766717/photocatalytic-oxidation-of-sulfur-mustard-and-its-simulant-on-bodipy-incorporated-polymer-coatings-and-fabrics
#17
Hui Wang, George W Wagner, Annie Xi Lu, Dominique L Nguyen, James H Buchanan, Patrick M McNutt, Christopher J Karwacki
Sulfur mustard is one of the most toxic chemical warfare agents worldwide. We report the use of 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY) photosensitizers as a fast and effective sulfur mustard decontaminant and their incorporation into various polymer coatings and fabrics, including army combat uniform. These BODIPY-embedded materials are capable of generating singlet oxygen under visible light irradiation and effectively detoxifying sulfur mustard by converting it into non-toxic sulfoxides as the major products...
May 16, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29766434/comparative-study-on-adsorption-of-crude-oil-and-spent-engine-oil-from-seawater-and-freshwater-using-algal-biomass
#18
Hamid Boleydei, Nourollah Mirghaffari, Omidvar Farhadian
Efficiency of a biosorbent prepared from the green macroalga Enteromorpha intestinalis biomass for decontamination of seawater and freshwater polluted by crude oil and engine spent oil was compared. The effect of different experimental conditions including contact time, pH, particle size, initial oil concentration, and biosorbent dose on the oil biosorption was studied in the batch method. The biosorbent was characterized by CHNOS, FTIR, and SEM analysis. The experimental data were well fitted to the pseudo-second-order kinetic model and the Langmuir adsorption isotherm model...
May 15, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29759641/impact-of-antimicrobial-wipes-compared-with-hypochlorite-solution-on-environmental-surface-contamination-in-a-health-care-setting-a-double-crossover-study
#19
Harsha Siani, Rebecca Wesgate, Jean-Yves Maillard
OBJECTIVE: Antimicrobial wipes are increasingly used in health care settings. This study evaluates, in a clinical setting, the efficacy of sporicidal wipes versus a cloth soaked in a 1,000 ppm chlorine solution. INTERVENTION: A double-crossover study was performed on 2 different surgical and cardiovascular wards in a 1,000-bed teaching hospital over 29 weeks. The intervention period that consisted of surface decontamination with the preimpregnated wipe or cloth soaked in chlorine followed a 5-week baseline assessment of microbial bioburden on surfaces...
May 11, 2018: American Journal of Infection Control
https://www.readbyqxmd.com/read/29751666/microstructural-properties-of-cement-paste-and-mortar-modified-by-low-cost-nanoplatelets-sourced-from-natural-materials
#20
Piao Huang, Liming Lv, Wei Liao, Chunhua Lu, Zhongzi Xu
Nanomaterials have been widely used in cement-based materials. Graphene has excellent properties for improving the durability of cement-based materials. Given its high production budget, it has limited its wide potential for application in the field of engineering. Hence, it is very meaningful to obtain low cost nanoplatelets from natural materials that can replace graphene nanoplatelets (GNPs) The purpose of this paper is to improve the resistance to chloride ion penetration by optimizing the pore structure of cement-based materials, and another point is to reduce investment costs...
May 11, 2018: Materials
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