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Qianyi Zhang, Evan G R Davies, James R Bolton, Yang Liu
Monochloramine (NH2 Cl) is widely used for secondary disinfection by water utilities. However, Edmonton field stormwater sampling results have shown that NH2 Cl, because of its long-lasting property, can cause stormwater contamination through outdoor potable water uses during the summer season. To protect water sources, it is important to understand NH2 Cl dissipation mechanisms in stormwater. Natural organic matter (NOM) is the dominant species that contributes to NH2 Cl decay in stormwater. In this research, it is proposed that NOM reacted with both NH2 Cl and free chlorine through rapid and long-term reactions during NH2 Cl dissipation...
March 12, 2018: Science of the Total Environment
Dana Towle, Vanisha Baker, Craig Schramm, Matthew O'Brien, Melanie S Collins, Richard Feinn, Thomas S Murray
OBJECTIVE: The Cystic Fibrosis Foundation (CFF) recommends routine nebulizer disinfection for patients but compliance is challenging due to the heavy burden of home care. SoClean® is a user friendly ozone based home disinfection device currently for home respiratory equipment. The objective of this study was to determine whether SoClean® has potential as a disinfection device for families with CF by killing CF associated bacteria without altering nebulizer output. HYPOTHESIS: Ozone based disinfection effectively kills bacterial pathogens inoculated to home nebulizer equipment without gross changes in nebulizer function...
March 15, 2018: Pediatric Pulmonology
T P Loch, M Faisal
Flavobacterial diseases are significant impediments to hatchery-based fishery conservation and aquaculture productivity worldwide. Recent studies revealed a multitude of novel flavobacteria within the reproductive fluids and unfertilized eggs of feral Chinook salmon Oncorhynchus tshawytscha broodstock, some of which were associated with systemic disease. Herein, embryonated eggs/fry from these broodstock were assayed for flavobacteria while in incubator stacks in three hatcheries over 2 years, as was the water entering hatchery incubators...
March 15, 2018: Journal of Fish Diseases
Chen Bin Tian
OBJECTIVE: The aim of this study was to explore the effects of acupuncture on mild postpartum depression (PPD). METHODS: 15 patients diagnosed with PPD were enrolled in the study. Patients who satisfied the inclusion criteria received acupuncture therapy eight times over 4 weeks in the form of two 20-min treatment sessions per week. The treatment site was the BL67 acupuncture point (on the outside of the fifth toenail). After disinfecting the skin on the toes, sterile steel needles were gently inserted into the acupuncture point until the patient started to feel numb or swollen, a sensation known as de qi ...
March 14, 2018: Acupuncture in Medicine: Journal of the British Medical Acupuncture Society
Steven Caskey, Jonathan Stirling, John E Moore, Jacqueline C Rendall
Chronic P. aeruginosa infection is associated with increased morbidity and mortality in patients with cystic fibrosis (CF). Current understanding of risk factors for acquisition is limited and so the aim of this study was to examine a large sample of environmental waters from diverse sources. Environmental water samples [n= 7904] from jacuzzis, hydrants, swimming pools, hot tubs, plunge pools, bottled natural mineral water (NMW), taps, springs, ice machines, water coolers, bores and showers were examined for the presence of P...
March 14, 2018: Letters in Applied Microbiology
Erin Fitzpatrick, Olivia J Holland, Jessica J Vanderlelie
Chronic wounds present a significant burden to the health care system and the patient. Ozone therapy has been proposed as a treatment for chronic wounds, potentially acting by eliciting mild oxidative stress or disinfection. The purpose of this systematic review is to evaluate the potential benefits and harms of ozone therapy as an advanced care intervention for chronic wounds. Studies were extracted from Google Scholar, PubMed, the Cochrane Library, and reference lists. General inclusion criteria included English-language randomised human trials reporting the use of ozone therapy in the topical treatment of chronic wounds...
March 13, 2018: International Wound Journal
Darika Saitawee, Aroon Teerakapong, Noppawan Phumala Morales, Paiboon Jitprasertwong, Doosadee Hormdee
BACKGROUND AND OBJECTIVE: Curcumin, one of an established curcuminoid substances extracted from Curcuma longa, has been used as a photosensitizer (PS) in photodynamic therapy (PDT). Curcuminoid substances has been reported to have benefits in treating dental chronic infection and inflammation diseases, such as chronic periodontitis. The purpose of this study was to find the optimum concentration of Curcuma longa (CL) extract, containing all curcuminoid substances, and the power density of blue light (BL) in photodynamic therapy against periodontally pathogenic bacteria, A...
March 10, 2018: Photodiagnosis and Photodynamic Therapy
Jaap D Legemate, Guido M Kamphuis, Jan Erik Freund, Joyce Baard, Stefano P Zanetti, Michele Catellani, Harry W Oussoren, Jean J de la Rosette
BACKGROUND: Flexible ureteroscopy is an established treatment modality for evaluating and treating abnormalities in the upper urinary tract. Reusable ureteroscope (USC) durability is a significant concern. OBJECTIVE: To evaluate the durability of the latest generation of digital and fiber optic reusable flexible USCs and the factors affecting it. DESIGN, SETTING, PARTICIPANTS: Six new flexible USCs from Olympus and Karl Storz were included...
March 10, 2018: European Urology Focus
Nova Nexhmije Ajeti, Teuta Pustina-Krasniqi, Sonja Apostolska
OBJECTIVES: During the treatment of chronic apical periodontitis and pulp necrosis the main role is to irrigate the root canal. AIM: The aim of this in vivo study was to irrigate with 0.9% NaCl (Natrium Chloride), 2.5 % NaOCl (Sodium Hypochlorite Solution, Sigma Aldrich - Germany) and 2% CHX (Chlorhexidine Digluconate Solution, Sigma Aldrich - Spain) combined with Gaseous Ozone (Prozone WH, Austria). MATERIAL AND METHODS: This study was realised in the University Dentistry Clinical Centre of Kosovo (UDCCK), respectively in the Department of Endodontic and Dental Pathology, Dental Branch, Faculty of Medicine, Prishtina, Kosovo...
February 15, 2018: Open Access Macedonian Journal of Medical Sciences
A S Varela-Stokes, S H Park, J V Stokes, N A Gavron, S I Lee, G M Moraru, S C Ricke
Our objective of this study was to explore the bacterial microbiome in fresh or fresh-frozen adult Amblyomma maculatum (Gulf Coast ticks) using extracts enriched for microbial DNA. We collected 100 questing adult A. maculatum, surface disinfected them, and extracted DNA from individual ticks collected the same day or after storage at -80 °C. Because only extracts with microbial DNA concentrations above 2 ng/μL were considered suitable for individual analysis, we expected fewer samples to meet these requirements...
March 1, 2018: Ticks and Tick-borne Diseases
João Cavaleiro Rufo, Inês Paciência, Diana Silva, Carla Martins, Joana Madureira, Eduardo de Oliveira Fernandes, Patrícia Padrão, Pedro Moreira, Luís Delgado, André Moreira
BACKGROUND: Endurance swimming exercises coupled to disinfection by-products exposure has been associated with increased airways dysfunction and neurogenic inflammation in elite swimmers. However, the impact of swimming pool exposure at a recreational level on autonomic activity has never been explored. Therefore, this study aimed to investigate how swimming pool attendance is influencing lung and autonomic function in school-aged children. METHODS: A total of 858 children enrolled a cross sectional survey...
2018: PloS One
N W Dahl, P L Woodfield, B A F Simpson, C J Lemckert, H M Stratton
Buoyancy-driven turbulent dispersion in a maturation pond is studied using a combination of field measurements and computational fluid dynamics. Modelling flow in maturation ponds requires turbulent closure models because of the large physical size and the need to model on diurnal timescales. Simulation results are shown to be more sensitive to the inclusion of a buoyancy production term appearing in the turbulent transport equations than to the model choice. Comparisons with experimental thermal profiles show that without this term, thermal mixing is over-predicted...
March 2018: Water Science and Technology: a Journal of the International Association on Water Pollution Research
Masanori Ando, Vasudevanpillai Biju, Yasushi Shigeri
Ozone (O3 ) gas is widely used as a strong oxidizing agent for many purposes, such as the decomposition/removal of organic contaminants and photoresist, and the deodorization/disinfection of air and water. However, ozone is highly toxic to the human body when the air concentration exceeds about 1 ppm. Therefore, there is increasing demand for simple, sensitive, reliable, and cost-effective techniques for sensing ozone gas. This article describes the features, advantages, and disadvantages of the available, practical techniques for sensing ozone gas in ambient air...
2018: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
Apurva Patange, Daniela Boehm, Michelle Giltrap, Peng Lu, P J Cullen, Paula Bourke
Generation of wastewater is one of the main environmental sustainability issues across food sector industries. The constituents of food process effluents are often complex and require high energy and processing for regulatory compliance. Wastewater streams are the subject of microbiological and chemical criteria, and can have a significant eco-toxicological impact on the aquatic life. Thus, innovative treatment approaches are required to mitigate environmental impact in an energy efficient manner. Here, dielectric barrier discharge atmospheric cold plasma (ACP) was evaluated for control of key microbial indicators encountered in food industry effluent...
March 8, 2018: Science of the Total Environment
Kai He, Erika Okuta, José Andres Cordero, Shinya Echigo, Yasuhiro Asada, Sadahiko Itoh
Anthropogenic compounds accidentally released to the environment could be important precursors of disinfection byproducts (DBPs) in drinking water treatment processes. In this study, the haloacetic acid formation potentials (HAAFPs) of 155 anthropogenic compounds listed on the Japanese pollutant release and transfer register (PRTR) system were evaluated. The results showed that phenolic and aromatic amine compounds were important HAA precursors, and chlorinated phenols showed high HAAFPs (>400 μg/mgC)...
February 19, 2018: Journal of Hazardous Materials
Ankita Chamaria, Meena A Aras, Vidya Chitre, Praveen Rajagopal
PURPOSE: To evaluate the effect of chemical disinfection on the color stability of room temperature vulcanizing (RTV) maxillofacial silicone elastomer with and without pigment addition. MATERIALS AND METHODS: Sixty specimens were obtained from a RTV maxillofacial silicone. The specimens were randomly divided into 6 groups according to pigments and disinfectant to be used (n = 10). NP-DW-nonpigmented silicone specimens to be immersed in distilled water (control)...
March 8, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
Kate A Worthing, Alan Marcus, Sam Abraham, Darren J Trott, Jacqueline M Norris
Qac genes are associated with increased tolerance to quaternary ammonium compounds and other cationic biocides such as chlorhexidine. This study aimed to determine whether qac genes and increased biocide tolerance were present in 125 clinical methicillin-resistant and susceptible veterinary staphylococci. A total of 125 methicillin-resistant Staphylococcus aureus (MRSA) and methicillin-resistant and -susceptible Staphylococcus pseudintermedius (MRSP and MSSP) from three archived Australian veterinary staphylococci collections underwent whole genome sequencing, multilocus sequence typing and qac gene screening...
March 2018: Veterinary Microbiology
Wiesława Grzesińska, Marzena Tomaszewska, Beata Bilska, Joanna Trafiałek, Michał Dziadek
Background: Providing safe food products to the consumer depends on the material and technology used and adherence to hygienic practices, throughout the production process. The degree of microbial contamination of a surface is an important indicator of equipment cleanliness and effectiveness of cleaning and disinfection. Used material, construction solutions and quality of the applied devices also have an effect on hygienic status. Objective: The objective of the present study was to evaluate the influence of the design and construction material of selected food storage racks, available on the Polish market, on their hygienic status...
2018: Roczniki Państwowego Zakładu Higieny
Meng Wang, Yinguang Chen
Wastewater reuse for resolving water shortage is increasingly emphasized. The presence of DOM in wastewater is a main consideration for wastewater reuse. Therefore, systematic understanding of characteristic changes of DOM in different wastewater treatment processes is needed. As biotechnology together with disinfection operation has been used widely by WWTPs to treat wastewater, this review aims to introduce the recent advances in the effects of wastewater biological treatment and disinfection on the characteristics of DOM...
February 27, 2018: Chemosphere
Jie Wu, Jian Ye, Huanlong Peng, Meirou Wu, Weiwei Shi, Yongmei Liang, Wei Liu
In the Pearl River Delta area, the upstream municipal wastewater is commonly discharged into rivers which are a pivotal source of downstream drinking water. Solar irradiation transforms some of the dissolved organic matter discharged from the wastewater, also affecting the formation of disinfection by-products in subsequent drinking water treatment plants. The effect of simulated solar radiation on soluble microbial products extracted from activated sludge was documented in laboratory experiments. Irradiation was found to degrade macromolecules in the effluent, yielding smaller, more reactive intermediate species which reacted with chlorine or chloramine to form higher levels of noxious disinfection by-products...
March 1, 2018: Chemosphere
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