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https://www.readbyqxmd.com/read/28732741/long-acting-water-stable-organosilane-agent-and-its-sustained-effect-on-reducing-microbial-load-in-an-intensive-care-unit
#1
Katie Fitton, Kimberly R Barber, Alison Karamon, Nate Zuehlke, Sara Atwell, Susan Enright
BACKGROUND: Contaminated hospital surfaces contribute significantly to the transmission of health care-associated infections. Although disinfectants reduce bioburden by up to 99%, bacterial growth can rebound within hours to precleaning levels. We tested the effectiveness of an innovative, long-acting water-stable organosilane (WSO) to achieve sustained decreases in bioburden on hard surfaces. METHODS: A 5-month prospective, randomized, double-blind controlled study was performed...
July 18, 2017: American Journal of Infection Control
https://www.readbyqxmd.com/read/28731833/the-dishwater-menace-and-the-compromising-solution-healthy-drinking-spaces-and-the-public-good-in-post-prohibition-ontario
#2
Dan Malleck
This paper examines inter-bureaucracy tension, negotiation, and resolution in the case of the oversight of beverage room sanitation in Ontario in the 1930s and 1940s. Both the Liquor Control Board of Ontario (LCBO) and various public health authorities claimed authority over the health status of public drinking spaces. But the LCBO had legislative priority. The ensuing debates regarding health and cleanliness linked issues of beverage room glass sanitation to a biopolitical approach to public drinking. Developing a more scientifically sophisticated approach to beverage glass cleaning required a balancing of administrative priorities...
July 21, 2017: Canadian Bulletin of Medical History, Bulletin Canadien D'histoire de la Médecine
https://www.readbyqxmd.com/read/28709272/multiscaling-behavior-of-atomic-scale-friction
#3
M Jannesar, T Jamali, A Sadeghi, S M S Movahed, G Fesler, E Meyer, B Khoshnevisan, G R Jafari
The scaling behavior of friction between rough surfaces is a well-known phenomenon. It might be asked whether such a scaling feature also exists for friction at an atomic scale despite the absence of roughness on atomically flat surfaces. Indeed, other types of fluctuations, e.g., thermal and instrumental fluctuations, become appreciable at this length scale and can lead to scaling behavior of the measured atomic-scale friction. We investigate this using the lateral force exerted on the tip of an atomic force microscope (AFM) when the tip is dragged over the clean NaCl (001) surface in ultra-high vacuum at room temperature...
June 2017: Physical Review. E
https://www.readbyqxmd.com/read/28696905/protection-during-production-problems-due-to-prevention-nail-and-skin-condition-after-prolonged-wearing-of-occlusive-gloves
#4
Wobbeke Weistenhöfer, Wolfgang Uter, Hans Drexler
Wearing of occlusive gloves during the whole working shift is considered a risk factor for developing hand eczema, similar to wet work. Moreover, the increased hydration due to glove occlusion may lead to brittle nails. Two hundred and seventy clean room workers, wearing occlusive gloves for prolonged periods, and 135 administrative employees not using gloves were investigated. This included a dermatological examination of the nails and the hands, using the Hand Eczema ScoRe for Occupational Screening (HEROS), measurement of transepidermal water loss (TEWL), and a standardized interview...
July 11, 2017: Journal of Toxicology and Environmental Health. Part A
https://www.readbyqxmd.com/read/28692913/particle-and-bioaerosol-characteristics-in-a-paediatric-intensive-care-unit
#5
Congrong He, Ian M Mackay, Kay Ramsay, Zhen Liang, Timothy Kidd, Luke D Knibbs, Graham Johnson, Donna McNeale, Rebecca Stockwell, Mark G Coulthard, Debbie A Long, Tara J Williams, Caroline Duchaine, Natalie Smith, Claire Wainwright, Lidia Morawska
The paediatric intensive care unit (PICU) provides care to critically ill neonates, infants and children. These patients are vulnerable and susceptible to the environment surrounding them, yet there is little information available on indoor air quality and factors affecting it within a PICU. To address this gap in knowledge we conducted continuous indoor and outdoor airborne particle concentration measurements over a two-week period at the Royal Children's Hospital PICU in Brisbane, Australia, and we also collected 82 bioaerosol samples to test for the presence of bacterial and viral pathogens...
July 7, 2017: Environment International
https://www.readbyqxmd.com/read/28686412/field-assisted-splitting-of-pure-water-based-on-deep-sub-debye-length-nanogap-electrochemical-cells
#6
Yifei Wang, S R Narayanan, Wei Wu
Owing to the low conductivity of pure water, using an electrolyte is common for achieving efficient water electrolysis. In this paper, we have fundamentally broken through this common sense by using deep-sub-Debye-length nanogap electrochemical cells to achieve efficient electrolysis of pure water (without any added electrolyte) at room temperature. A field-assisted effect resulted from overlapped electrical double layers can greatly enhance water molecules ionization and mass transport, leading to electron-transfer limited reactions...
July 11, 2017: ACS Nano
https://www.readbyqxmd.com/read/28665797/surveillance-of-bacterial-colonisation-on-contact-surfaces-in-different-medical-wards
#7
Karmen Godič Torkar, Sanja Ivić
This study was conducted to determine the bacterial colonization of some bacterial groups, including extended-spectrum β-lactamase (ESBLs) producers and methicillin-resistant Staphylococcus aureus (MRSA), on surfaces of the equipment and instruments in patient rooms and other workspaces in three different medical wards. The number of microorganisms on swabs was determined with the colony count method on selective microbiological mediums. The aerobic mesophylic microorganisms were found in 73.5 % out of 102 samples, with the average and maximum values of 2...
June 27, 2017: Arhiv za Higijenu Rada i Toksikologiju
https://www.readbyqxmd.com/read/28650727/models-for-nearly-every-occasion-part-iv-two-box-decreasing-emission-models
#8
Gary H Ganser, Paul Hewett
New two box "well-mixed room" decreasing emission (DE) models are introduced for scenarios that involve local controls, such as some form of local exhaust or local exhaust with filtered return. In addition, these models allow for the recirculation of a filtered (or cleaned) portion of the general room ventilation. For each control device scenario, a steady state and transient near and far field model is presented. The transient equations predict the concentration at time t after the application of the substance...
June 26, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/28650714/models-for-nearly-every-occasion-part-iii-one-box-decreasing-emission-models
#9
Paul Hewett, Gary H Ganser
New one box "well-mixed room" decreasing emission (DE) models are introduced that allow for local exhaust or local exhaust with filtered return, as well the recirculation of a filtered (or cleaned) portion of the general room ventilation. For each control device scenario, a steady state and transient model is presented. The transient equations predict the concentration at any time t after the application of a known mass of a volatile substance to a surface, and can be used to predict the task exposure profile, the average task exposure, as well as peak and short-term exposures...
June 26, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/28631587/dietary-supplementation-with-a-nucleotide-rich-yeast-extract-modulates-gut-immune-response-and-microflora-in-weaned-pigs-in-response-to-a-sanitary-challenge
#10
S M Waititu, F Yin, R Patterson, A Yitbarek, J C Rodriguez-Lecompte, C M Nyachoti
An experiment was carried out to evaluate the short-term effect of supplementing a nucleotide-rich yeast extract (NRYE) on growth performance, gut structure, immunity and microflora of piglets raised under sanitary and unsanitary conditions. A total of 84, 21-day old piglets were used in this study; 42 piglets were raised in a room designated as the clean room that was washed once per week, whereas the other 42 piglets were raised in a room designated as the unclean room in which 7 kg of manure from the sow herd was spread on each pen floor on day 1 and 7 and the room was not washed throughout the experiment...
June 20, 2017: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/28613080/wetland-based-phytoremediation-of-biosolids-from-an-end-of-life-municipal-lagoon-a-microcosm-study
#11
Inoka Amarakoon, Adenike O Hassan, Francis Zvomuya
This study examined the effectiveness of a wetland system for phytoremediation of biosolids from an end-of-life municipal lagoon. The microcosm experiment tested the effects of one vs. two harvests of cattail per growth cycle in biosolids without (PB) or with (PBS) the addition of soil on phytoremediation. Cattail (Typha latifolia)) seedlings were transplanted into pots containing 4.5 kg (dry wt.) of biosolids, above which a 10-cm deep water column was maintained. Results showed that two harvests per growth cycle significantly increased N and P phytoextraction relative to a single harvest...
June 14, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28610581/household-air-pollution-from-cooking-and-risk-of-adverse-health-and-birth-outcomes-in-bangladesh-a-nationwide-population-based-study
#12
Md Nuruzzaman Khan, Cherri Zhang B Nurs, M Mofizul Islam, Md Rafiqul Islam, Md Mizanur Rahman
BACKGROUND: Household air pollution (HAP) from cooking with solid fuels has become a leading cause of death and disability in many developing countries including Bangladesh. We assess the association between HAP and risk of selected adverse birth and maternal health outcomes. METHODS: Data for this study were extracted from Bangladesh Demographic and Health Survey conducted during 2007-2014. Selected adverse birth outcomes were acute respiratory infection (ARI) among children, stillbirth, low birth weight (LBW), under-five mortality, neonatal mortality and infant mortality...
June 13, 2017: Environmental Health: a Global Access Science Source
https://www.readbyqxmd.com/read/28607974/an-iron-germylene-complex-having-fe-h-and-ge-h-bonds-synthesis-structure-and-reactivity
#13
Tara Prasad Dhungana, Hisako Hashimoto, Hiromi Tobita
A base-free iron germylene complex Cp*(CO)(H)Fe[double bond, length as m-dash]GeH{C(SiMe3)3} (1) was synthesised by abstraction of pyridine from a germyl complex Cp*(CO)(py)FeGeH2{C(SiMe3)3} (2), which was prepared by treatment of Cp*Fe(CO)(py)(Me) with H3GeC(SiMe3)3. X-ray crystallographic analysis revealed that 1 has an Fe-Ge bond that is the shortest among those ever reported. Reactivity of 1 toward several polar unsaturated organic compounds was investigated. Complex 1 underwent stoichiometric hydrogermylation of carbonyl compounds such as ketones, aldehydes and isocyanates (RNCO) at room temperature...
June 27, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28604908/metal-free-synthesis-of-isatin-oximes-via-radical-coupling-reactions-of-oxindoles-with-t-buono-in-water
#14
Wen-Ting Wei, Wen-Ming Zhu, Wei-Wei Ying, Yi Wu, Yi-Ling Huang, Hongze Liang
A metal-free method for the synthesis of isatin oximes was developed through the radical coupling reactions of oxindoles with t-BuONO. This protocol provides a practical and environmentally benign method for the construction of C-N bonds in water at room temperature without using any other reagents. The advantages of this strategy are its mild reaction conditions and clean procedure.
June 27, 2017: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/28595322/the-effects-of-bit-wear-on-respirable-silica-dust-noise-and-productivity-a-hammer-drill-bench-study
#15
Paul Carty, Michael R Cooper, Alan Barr, Richard L Neitzel, John Balmes, David Rempel
Objectives: Hammer drills are used extensively in commercial construction for drilling into concrete for tasks including rebar installation for structural upgrades and anchor bolt installation. This drilling task can expose workers to respirable silica dust and noise. The aim of this pilot study was to evaluate the effects of bit wear on respirable silica dust, noise, and drilling productivity. Method: Test bits were worn to three states by drilling consecutive holes to different cumulative drilling depths: 0, 780, and 1560 cm...
June 8, 2017: Annals of Work Exposures and Health
https://www.readbyqxmd.com/read/28579835/transmission-of-health-care-associated-infections-from-roommates-and-prior-room-occupants-a-systematic-review
#16
REVIEW
Bevin Cohen, Catherine Crawford Cohen, Borghild Løyland, Elaine L Larson
Pathogens that cause health care-associated infections (HAIs) are known to survive on surfaces and equipment in health care environments despite routine cleaning. As a result, the infection status of prior room occupants and roommates may play a role in HAI transmission. We performed a systematic review of the literature evaluating the association between patients' exposure to infected/colonized hospital roommates or prior room occupants and their risk of infection/colonization with the same organism. A PubMed search for English articles published in 1990-2014 yielded 330 studies, which were screened by three reviewers...
2017: Clinical Epidemiology
https://www.readbyqxmd.com/read/28579472/identifying-environmental-reservoirs-of-clostridium-difficile-with-a-scent-detection-dog-preliminary-evaluation
#17
Elizabeth Bryce, Teresa Zurberg, Markus Zurberg, Salomeh Shajari, Diane Roscoe
BACKGROUND: Prompted by an article describing a dog trained to detect Clostridium difficile in patients, our institution evaluated a dog's ability to detect C. difficile scent from equipment and surfaces to assist in strategic deployment of adjunctive cleaning measures. METHODS: An expert in drug and explosives scent dog handling trained a canine to identify odours from pure cultures and/or faecal specimens positive for C. difficile. Methods used to assess explosive and drug detection dogs were adapted and included evaluation of a) odour recognition, using containers positive and negative for the scent of C...
June 1, 2017: Journal of Hospital Infection
https://www.readbyqxmd.com/read/28574072/dealloying-assisted-high-yield-growth-of-surfactant-free-110-highly-active-cu-doped-ceo2-nanowires-for-low-temperature-co-oxidation
#18
Tianyi Kou, Conghui Si, John Pinto, Chunyan Ma, Zhonghua Zhang
CeO2 is widely used as a commercial CO oxidation catalyst, but it suffers from high-temperature (>200 °C) complete conversion. Despite enormous efforts made to promote its low-temperature activity by interfacing CuO and CeO2, it is still a long-standing challenge to balance the desired catalytic activity with high-yield preparation. Creating intimate synergistic interfaces between Cu and Ce species and exploring surfactant-free large-scale methods are both critical and challenging. To address these concerns, we synthesized highly active Cu doped CeO2 nanowires for low-temperature CO oxidation, relying on intentionally maneuvering precursor alloy compositions and a high-yield dealloying method...
June 2, 2017: Nanoscale
https://www.readbyqxmd.com/read/28571980/effectiveness-of-cleaning-disinfection-wipes-and-sprays-against-multidrug-resistant-outbreak-strains
#19
Nikki Kenters, Elisabeth G W Huijskens, Sophie C J de Wit, Joost van Rosmalen, Andreas Voss
BACKGROUND: Hospital rooms play an important role in the transmission of several health care-associated pathogens. During the last few years, a number of innovative cleaning-disinfecting products have been brought to market. In this study, commercially available products combining cleaning and disinfection were compared, using 2 different application methods. The aim was to determine which product was most effective in simultaneous cleaning and disinfection of surfaces. METHODS: Seven cleaning-disinfecting wipes and sprays based on different active ingredients were tested for their efficacy in removal of microbial burden and proteins...
May 29, 2017: American Journal of Infection Control
https://www.readbyqxmd.com/read/28571372/reactivity-of-o2-on-pd-ru-0001-and-pdru-ru-0001-surface-alloys
#20
D Farías, M Minniti, R Miranda
The reactivity of a Pd monolayer epitaxially grown on Ru(0001) toward O2 has been investigated by molecular beam techniques. O2 initial sticking coefficients were determined using the King and Wells method in the incident energy range of 40-450 meV and for sample temperatures of 100 K and 300 K, and compared to the corresponding values measured on the clean Ru(0001) and Pd(111) surfaces. In contrast to the high reactivity shown by Ru(0001) at 100 K, the Pd/Ru(0001) system exhibits a monotonic decrease in the sticking probability of O2 as a function of normal incident energy...
May 28, 2017: Journal of Chemical Physics
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