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https://www.readbyqxmd.com/read/28541772/fungal-levels-in-houses-in-the-fukushima-daiichi-nuclear-power-plant-evacuation-zone-after-the-great-east-japan-earthquake
#1
Naohide Shinohara, Masahiro Tokumura, Kazuhiro Hashimoto, Katsuyoshi Asano, Yuji Kawakami
Residences located within 20 km of the damaged Fukushima Daiichi nuclear power plant were evacuated shortly after the Great East Japan Earthquake. The levels of airborne and surface fungi were measured in six houses in the evacuation zone in August 2012 and February 2013. Airborne fungal levels in all of the houses in the summer were higher than the environmental standard levels for residential houses published in Architectural Institute of Japan (>1,000 CFU/m(3)). In two houses whose residents rarely returned to visit, fungal levels were extremely high (> 52,000 CFU/m(3))...
May 25, 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/28541663/mechanistic-insight-into-the-reactivity-of-chlorine-derived-radicals-in-the-aqueous-phase-uv-chlorine-advanced-oxidation-process-quantum-mechanical-calculations
#2
Daisuke Minakata, Divya Kamath, Shaye Maetzold
The combined ultraviolet (UV) and free chlorine (UV/chlorine) advanced oxidation process that produces highly reactive hydroxyl radicals (HO•) and chlorine radicals (Cl•) is an attractive alternative to UV alone or chlorination for disinfection because of the destruction of a wide variety of organic compounds. However, concerns about the potential formation of chlorinated transformation products require an understanding of the radical-induced elementary reaction mechanisms and their reaction rate constants...
May 25, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28540437/volatile-organic-compounds-and-good-laboratory-practices-in-the-in-vitro-fertilization-laboratory-the-important-parameters-for-successful-outcome-in-extended-culture
#3
Nupur Agarwal, Ratna Chattopadhyay, Sanghamitra Ghosh, Arpita Bhoumik, S K Goswami, Baidyanath Chakravarty
PURPOSE: This study aims to describe the role of implementing good laboratory practices to improve in vitro fertilization (IVF) outcomes which are of great interest for practitioners dealing with infertility. METHODS: Certain modifications were introduced in May 2015 in our IVF laboratory like high-efficiency particulate air CODA system, steel furniture instead of wooden, use of new disinfectants like oosafe, and restriction of personnel entry along with avoidance of cosmetics like perfume to improve pregnancy rates...
May 24, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/28540102/awareness-and-knowledge-of-undergraduate-dental-students-about-sterilization-disinfection-methods-of-extracted-human-teeth
#4
S C Deogade, S S Mantri, S Saxena, K Sumathi
BACKGROUND: Dental undergraduate students work on extracted human teeth in preclinical practical's to learn technical skills before entering the clinics and delivering dental care to the patients. AIM: The aim of the present investigation was to assess the awareness and knowledge toward sterilization/disinfection methods of extracted human teeth in a selected group of Indian dental students. MATERIALS AND METHODS: In this descriptive cross-sectional study, the participants consisted of 2(nd)-, 3(rd)-, 4(th)-, and 5(th)-year dental students...
November 2016: Annals of Medical and Health Sciences Research
https://www.readbyqxmd.com/read/28539615/a-novel-gravity-driven-nanofibrous-membrane-for-point-of-use-water-disinfection-polydopamine-induced-in-situ-silver-incorporation
#5
Jianqiang Wang, Yichao Wu, Zhe Yang, Hao Guo, Bin Cao, Chuyang Y Tang
We report a facile method for preparing silver-loaded membranes for point-of-use disinfection and disaster relief applications. A bio-inspired material, polydopamine, was coated onto a highly porous nanofibrous polyacrylonitrile substrate. We then take advantage of the redox properties of polydopamine to form silver nanoparticles in situ. These nanoparticles were uniformly distributed on the surface of nanofibers with no apparent agglomeration at a silver loading up to 4.36 wt.% (cPAN-Ag1.5). The silver-incorporated membrane cPAN-Ag1...
May 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28539095/effectiveness-of-non-fluoride-and-fluoride-dentifrices-for-denture-hygiene
#6
Gökçe Meriç, Meryem Güvenir, Kaya Suer
OBJECTIVE: To compare the effectiveness of commonly used herbal/non-fluoride with fluoride dentifrices in order to eliminate pathogenic oral microorganisms from denture base material. MATERIALS AND METHODS: Heat-polymerized acrylic resin specimens (n = 288) were divided into three groups and each group inoculated with three various microorganisms (n = 96 for each) Candida albicans, Staphylococcus aureus and Pseudomonas aeruginosa (P. aeruginosa). Contaminated specimens were randomly assigned to the application of six herbal/non-fluoride and three fluoride dentifrices...
May 24, 2017: Acta Odontologica Scandinavica
https://www.readbyqxmd.com/read/28538249/norovirus-and-clostridium-difficile-outbreaks-squelching-the-wildfire
#7
Ann Fisher, Louise M Dembry
PURPOSE OF REVIEW: Gastrointestinal outbreaks in the healthcare setting cause increased morbidity and mortality in an already vulnerable population. Optimization of infection prevention measures can be a challenge in healthcare settings. This review describes new literature that may change the traditional infection prevention approach to such outbreaks. RECENT FINDINGS: Asymptomatic carriers of both norovirus and Clostridium difficile can pose risk of transmission to others and the environment...
May 22, 2017: Current Opinion in Infectious Diseases
https://www.readbyqxmd.com/read/28538093/toxic-byproduct-formation-during-electrochemical-treatment-of-latrine-wastewater
#8
Justin T Jasper, Yang Yang, Michael R Hoffmann
Electrochemical systems are an attractive option for onsite latrine wastewater treatment due to their high efficiency and small footprint. While concerns remain over formation of toxic byproducts during treatment, rigorous studies examining byproduct formation are lacking. Experiments treating authentic latrine wastewater over variable treatment times, current densities, chloride concentrations, and anode materials were conducted to characterize byproducts and identify conditions that minimize their formation...
May 24, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28537026/triclocarban-uv-photolysis-wastewater-disinfection-and-ecotoxicity-assessment-using-molecular-biomarkers
#9
Suéllen Satyro, Enrico Mendes Saggioro, Fábio Veríssimo, Daniel Forsin Buss, Danielly de Paiva Magalhães, Anabela Oliveira
Triclocarban (TCC) is an antibacterial agent found in pharmaceuticals and personal care products (PPCP). It is potentially bioaccumulative and an endocrine disruptor, being classified as a contaminant of emerging concern (CEC). In normal uses, approximately 96% of the used TCC can be washed down the drain going into the sewer system and eventually enter in the aquatic environment. UV photolysis can be used to photodegrade TCC and ecotoxicity assays could indicate the photodegradation efficiency, since the enormous structural diversity of photoproducts and their low concentrations do not always allow to identify and quantify them...
May 23, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28535951/experimental-hydrophilic-vinyl-polysiloxane-vps-impression-materials-incorporating-a-novel-surfactant-compared-with-commercial-vps
#10
Shahab Ud Din, Sandra Parker, Michael Braden, Pete Tomlins, Mangala Patel
OBJECTIVES: To formulate experimental hydrophilic (Exp) VPS impression materials incorporating a novel surfactant (Rhodasurf CET-2), and to compare their contact angles (CAs) with commercial materials, before/after disinfection. METHODS: CAs were measured immediately after setting and after disinfection (1% NaOCl; 30min and 24h), together with their change whilst a droplet remained on the materials surface (over 10, 20, 30 60 and 120s), on three commercial (Aquasil Ultra-Monophase [Aq M], Elite HD-Monophase [Elt M], Extrude Medium-bodied [Extr M]) and four experimental (Exp I-IV) materials, using the Drop Shape Analysis 100 technique...
May 20, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28535480/ozonation-of-the-oxybenzone-octinoxate-and-octocrylene-uv-filters-reaction-kinetics-absorbance-characteristics-and-transformation-products
#11
Zachary R Hopkins, Sebastian Snowberger, Lee Blaney
UV-filters (UVFs) are active ingredients in personal care products that protect skin from exposure to UV light. Environmentally-relevant concentrations of UVFs have recently been linked to toxicity in aquatic organisms, necessitating research into improved UVF removal in water/wastewater treatment. Here, we investigated ozonation of the three most commonly employed UVFs: octinoxate (OMC), octocrylene (OC), and oxybenzone (OXY). Specific second-order rate constants for UVF reaction with ozone were identified as follows: OMC, 5...
May 10, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28534395/hyaluronic-acid-templated-ag-nanoparticles-graphene-oxide-composites-for-synergistic-therapy-of-bacteria-infection
#12
Xiang Ran, Ye Du, Zhenzhen Wang, Huan Wang, Fang Pu, Jinsong Ren, Xiaogang Qu
Developing methods of decreasing the harm to cell and increasing the antibacterial efficiency is becoming a potential topic to medical treatments. We demonstrated a hyaluronidase-triggered photothermal platform for killing bacteria based on AgNPs and graphene oxide (GO). The property of the HAase-triggered release provided excellent antibacterial activity against S. aureus. Upon illumination of NIR light, the GO-based nanomaterials locally raised the temperature, resulting in high mortality of bacterial. The HAase-triggered AgNPs releasing approach for antibacterial allows AgNPs to be protected by HA template without affecting mammalian cells...
May 23, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28532807/distribution-of-aleutian-mink-disease-virus-contamination-in-the-environment-of-infected-mink-farms
#13
A Prieto, R Fernández-Antonio, J M Díaz-Cao, G López, P Díaz, J M Alonso, P Morrondo, G Fernández
Control and eradication of Aleutian Mink Disease Virus (AMDV) are a major concern for fur-bearing animal production. Despite notably reducing disease prevalence, current control programs are unable to prevent the reinfection of farms, and environmental AMDV persistence seems to play a major role regarding this issue. In this study 114 samples from different areas and elements of seven infected mink farms were analyzed by qPCR in order to evaluate the environmental distribution of AMDV load. Samples were classified into nine categories, depending on the type of sample and degree of proximity to the animals, the main source of infection...
May 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28532805/efficacy-of-disinfectants-and-detergents-intended-for-a-pig-farm-environment-where-salmonella-is-present
#14
Rebecca J Gosling, Ian Mawhinney, Kelly Vaughan, Robert H Davies, Richard P Smith
Disinfection is a useful component of disease control, although products and chemical groups vary in their activity against different pathogens. This study investigated the ability of fifteen disinfectants to eliminate pig-associated Salmonella. Active compounds of products included chlorocresol, glutaraldehyde/formaldehyde, glutaraldehyde/quaternary ammonium compounds (QAC), iodine, peracetic acid and potassium peroxomonosulphate. Six detergents were also tested for their ability to dislodge faecal material, and interactions with specific disinfectants...
May 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28532525/management-of-risks-from-water-and-ice-from-ice-machines-for-the-very-immunocompromised-host-a-process-improvement-project-prompted-by-an-outbreak-of-rapidly-growing-mycobacteria-on-a-pediatric-hematopoietic-stem-cell-transplant-hsct-unit
#15
Amanda Guspiel, Jeremiah Menk, Andrew Streifel, Keith Messinger, John Wagner, Patricia Ferrieri, Susan Kline
BACKGROUND In 2011, pediatric hematopoietic stem cell transplant (HSCT) patients were moved from an older hospital to a new children's hospital. To minimize bacterial growth in the new hospital's water during construction, the plumbing system was flushed and disinfected before occupancy. However, 6 months after occupancy, an increased incidence of rapidly growing mycobacteria (RGM) was detected in clinical cultures. Over 10 months, 15 pediatric HSCT patients were infected, while no pediatric HSCT patients had been infected in the preceding 12 months...
May 23, 2017: Infection Control and Hospital Epidemiology
https://www.readbyqxmd.com/read/28531657/efficient-water-disinfection-with-ag2wo4-doped-mesoporous-g-c3n4-under-visible-light
#16
Yi Li, Yanan Li, Shuanglong Ma, Pengfei Wang, Qianlei Hou, Jingjing Han, Sihui Zhan
Ag2WO4/g-C3N4 composite photocatalyst was synthesized by polymerization of thiourea and ammonia chloride combined with the deposition-precipitation method, which was applied as an efficient visible-light driven photocatalyst for inactivating Escherichia coli (E. coli). The physicochemical properties of these photocatalysts were systematically characterized by various techniques such as SEM, TEM, XRD, FT-IR, BET, UV-vis DRS and PL. The synthesized photocatalysts exhibited outstandingly enhanced photocatalytic disinfection efficiency compared with that of pure g-C3N4 and Ag2WO4 under visible light...
May 11, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28531557/characterization-of-dissolved-organic-carbon-leached-from-a-woodchip-bioreactor
#17
Ibrahim Abusallout, Guanghui Hua
Woodchip bioreactors are increasingly being applied to remove nitrate from agricultural subsurface drainage. However, dissolved organic carbon (DOC) released from woodchips may negatively affect the aquatic ecosystems and drinking water supplies. The objective of this study was to evaluate the leaching characteristics, disinfection byproduct (DBP) formation potentials, and treatability of DOC derived from a laboratory woodchip bioreactor. Initial flush of woodchips resulted in the release of high organic content from woodchips...
May 13, 2017: Chemosphere
https://www.readbyqxmd.com/read/28531182/selection-of-a-biosafety-level-1-bsl-1-surrogate-to-evaluate-surface-disinfection-efficacy-in-ebola-outbreaks-comparison-of-four-bacteriophages
#18
Karin Gallandat, Daniele Lantagne
The 2014 West African Ebola virus disease outbreak was the largest to date, and conflicting, chlorine-based surface disinfection protocols to interrupt disease transmission were recommended. We identified only one study documenting surface disinfection efficacy against the Ebola virus, showing a >6.6 log reduction after 5-minute exposure to 0.5% sodium hypochlorite (NaOCl) based on small-scale tests (Cook et al. (2015)). In preparation for future extensive, large-scale disinfection efficacy experiments, we replicated the Cook et al...
2017: PloS One
https://www.readbyqxmd.com/read/28531123/evaluation-of-drinking-water-disinfectant-byproducts-compliance-data-as-an-indirect-measure-for-short-term-exposure-in-humans
#19
Shahid Parvez, Kali Frost, Madhura Sundararajan
In the absence of shorter term disinfectant byproducts (DBPs) data on regulated Trihalomethanes (THMs) and Haloacetic acids (HAAs), epidemiologists and risk assessors have used long-term annual compliance (LRAA) or quarterly (QA) data to evaluate the association between DBP exposure and adverse birth outcomes, which resulted in inconclusive findings. Therefore, we evaluated the reliability of using long-term LRAA and QA data as an indirect measure for short-term exposure. Short-term residential tap water samples were collected in peak DBP months (May-August) in a community water system with five separate treatment stations and were sourced from surface or groundwater...
May 20, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28530469/rapid-bacterial-detection-during-endodontic-treatment
#20
D B Herzog, N A Hosny, S A Niazi, G Koller, R J Cook, F Foschi, T F Watson, F Mannocci, F Festy
Bacteria present in the root canal (RC) space following an RC treatment (RCT) can lead to persistent infections, resulting in treatment failure and the need for reintervention or extraction. Currently, there are no standardized methods in use to clinically detect bacterial presence within RC spaces. The use of paper point sampling and fluorescence staining was shown to be a rapid method, able to detect residual bacteria following treatment. The study demonstrated that Calcein acetoxymethyl (AM) proved to be a suitable dye for detecting vital bacteria within mature endodontic biofilms, with an improved sensitivity over colony-forming unit counting in a stressed biofilm model...
June 2017: Journal of Dental Research
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