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https://www.readbyqxmd.com/read/28107915/a-clean-photometric-method-for-the-determination-of-losartan-potassium-in-pharmaceuticals-exploiting-light-scattering-effect-and-employing-a-multicommuted-flow-analysis-approach
#1
Manoel J A Lima, Boaventura F Reis
This paper describes an environmentally friendly procedure for the determination of losartan potassium (Los-K) in pharmaceuticals. The photometric method was based on the light scattering effect due to particles suspension, which were formed by the reaction of Los-K with Cu (II) ions. The method was automated employing a multicommuted flow analysis approach, implemented using solenoid mini-pumps for fluid propelling and a homemade LED based photometer. Under the optimized experimental conditions, the procedure showed a linear relationship in the concentration range of 23...
March 1, 2017: Talanta
https://www.readbyqxmd.com/read/28107908/evaluation-and-reduction-of-the-analytical-uncertainties-in-gc-ms-analysis-using-a-boundary-regression-model
#2
Miao Yu, Xingwang Hou, Qian Liu, Yawei Wang, Jiyan Liu, Guibin Jiang
The uncertainties in analysis of trace environmental pollutants may come from sample matrix and sample pretreatment process. In this study, a boundary model was developed based on the visualized data of mass spectrometry to evaluate the influences from sample matrix and pretreatment process. The factors affecting the pretreatment procedures, such as the solvents, the extraction sorbents and the extraction process had limited influences compared with matrix effects. Using such boundary model, we found that selecting suitable qualitative and quantitative ions for MS detector is more important for reducing the matrix effect in GC-MS analysis than the traditionally used methods of optimizing the pretreatment process since some clean up sorbents might be useless to reduce the matrix effects...
March 1, 2017: Talanta
https://www.readbyqxmd.com/read/28106311/potential-applications-of-non-thermal-plasmas-against-biofilm-associated-microorganisms-in-vitro
#3
REVIEW
Pradeep Puligundla, Chulkyoon Mok
Biofilms as complex microbial communities attached to surfaces are posing several challenges in different sectors, ranging from food and healthcare to desalination and power generation. Biofilms survive in hostile environments due to a distinct physiology and behavior in comparison to their planktonic counterparts. They are ubiquitous, resilient, and difficult to eradicate due to their resistant phenotype. Several chemical-based cleaning and disinfection regimens are conventionally used against biofilm-dwelling microorganisms in vitro...
January 20, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28104287/enhanced-terminal-room-disinfection-and-acquisition-and-infection-caused-by-multidrug-resistant-organisms-and-clostridium-difficile-the-benefits-of-enhanced-terminal-room-disinfection-study-a-cluster-randomised-multicentre-crossover-study
#4
Deverick J Anderson, Luke F Chen, David J Weber, Rebekah W Moehring, Sarah S Lewis, Patricia F Triplett, Michael Blocker, Paul Becherer, J Conrad Schwab, Lauren P Knelson, Yuliya Lokhnygina, William A Rutala, Hajime Kanamori, Maria F Gergen, Daniel J Sexton
BACKGROUND: Patients admitted to hospital can acquire multidrug-resistant organisms and Clostridium difficile from inadequately disinfected environmental surfaces. We determined the effect of three enhanced strategies for terminal room disinfection (disinfection of a room between occupying patients) on acquisition and infection due to meticillin-resistant Staphylococcus aureus, vancomycin-resistant enterococci, C difficile, and multidrug-resistant Acinetobacter. METHODS: We did a pragmatic, cluster-randomised, crossover trial at nine hospitals in the southeastern USA...
January 16, 2017: Lancet
https://www.readbyqxmd.com/read/28101771/impact-of-relocation-and-environmental-cleaning-on-reducing-the-incidence-of-healthcare-associated-infection-in-nicu
#5
Qiu-Fang Li, Hong Xu, Xiao-Ping Ni, Rong Lin, Hui Jin, Ling-Ya Wei, Dan Liu, Lin-Hai Shen, Jie Zha, Xin-Fen Xu, Bo Wu
BACKGROUND: Hospital environment remains a risk for healthcare-associated infections (HAIs). This was a prospective study to evaluate the comprehensive impact of relocating a neonatal intensive care unit (NICU) to a new facility and improved environmental cleaning practice on the presence of methicillin-resistant Staphylococcus aureus (MRSA) on inanimate surfaces and the incident rate of HAIs. METHODS: New environmental cleaning measures were adopted after the NICU was moved to a new and better-designed location...
January 19, 2017: World Journal of Pediatrics: WJP
https://www.readbyqxmd.com/read/28100179/exploring-surface-cleaning-strategies-in-hospital-to-prevent-contact-transmission-of-methicillin-resistant-staphylococcus-aureus
#6
Hao Lei, Rachael M Jones, Yuguo Li
BACKGROUND: Cleaning of environmental surfaces in hospitals is important for the control of methicillin-resistant Staphylococcus aureus (MRSA) and other hospital-acquired infections transmitted by the contact route. Guidance regarding the best approaches for cleaning, however, is limited. METHODS: In this study, a mathematical model based on ordinary differential equations was constructed to study MRSA concentration dynamics on high-touch and low-touch surfaces, and on the hands and noses of two patients (in two hospitals rooms) and a health care worker in a hypothetical hospital environment...
January 18, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28095085/building-community-stakeholder-perspectives-on-walking-in-malls-and-other-venues
#7
Basia Belza, Christina E Miyawaki, Peg Allen, Diane K King, David X Marquez, Dina L Jones, Sarah Janicek, Dori Rosenberg, David R Brown
Mall walking has been a popular physical activity for decades. However, little is known about why mall managers support these programs or why adults choose to walk. Our study aim was to describe mall walking programs from the perspective of walkers, managers, and leaders. Twenty-eight walkers, 16 walking program managers, and six walking program leaders from five states participated in a telephone or in-person semi-structured interview (N=50). Interview guides were developed using a social-ecological model...
January 17, 2017: Journal of Aging and Physical Activity
https://www.readbyqxmd.com/read/28092754/public-participation-gis-for-improving-wood-burning-emissions-from-residential-heating-and-urban-environmental-management
#8
Susana López-Aparicio, Matthias Vogt, Philipp Schneider, Maarit Kahila-Tani, Anna Broberg
A crowdsourcing study supported by a public participation GIS tool was designed and carried out in two Norwegian regions. The aim was to improve the knowledge about emissions from wood burning for residential heating in urban areas based on the collection of citizens' localized insights. We focus on three main issues: 1) type of dwelling and residential heating source; 2) wood consumption and type of wood appliances; and 3) citizens' perception of the urban environment. Our study shows the importance of wood burning for residential heating, and of the resulted particle emissions, in Norwegian urban areas...
January 13, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28089966/revision-of-viable-environmental-monitoring-in-a-development-pilot-plant-based-on-quality-risk-assessment-a-case-study
#9
Ildikó No Ziegler, Judit No Borbély-Jakab, Lilla No Lilla Sugó, Réka J Kovács
In this case study, the principles of Quality Risk Management were applied to review sampling points and monitoring frequencies in the Hormonal Tableting unit of a Formulation Development Pilot Plant. In the cleanroom area premises of different functions are located, therefore a general method was established for the risk evaluation based on the Hazard Analysis and Critical Control Points (HACCP) method to evaluate these premises (i.e. production area itself and ancillary clean areas) from the point of view of microbial load and state in order to observe if the existing monitoring program met the emerged advanced monitoring practice...
January 15, 2017: PDA Journal of Pharmaceutical Science and Technology
https://www.readbyqxmd.com/read/28079191/enhanced-radiation-tolerant-oxide-dispersion-strengthened-steel-and-its-microstructure-evolution-under-helium-implantation-and-heavy-ion-irradiation
#10
Chenyang Lu, Zheng Lu, Xu Wang, Rui Xie, Zhengyuan Li, Michael Higgins, Chunming Liu, Fei Gao, Lumin Wang
The world eagerly needs cleanly-generated electricity in the future. Fusion reactor is one of the most ideal energy resources to defeat the environmental degradation caused by the consumption of traditional fossil energy. To meet the design requirements of fusion reactor, the development of the structural materials which can sustain the elevated temperature, high helium concentration and extreme radiation environments is the biggest challenge for the entire material society. Oxide dispersion strengthened steel is one of the most popular candidate materials for the first wall/blanket applications in fusion reactor...
January 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28073080/impact-of-environmental-factors-on-the-culturability-and-viability-of-listeria-monocytogenes-under-conditions-encountered-in-food-processing-plants
#11
Anaïs Overney, Joséphine Jacques-André-Coquin, Patricia Ng, Brigitte Carpentier, Laurent Guillier, Olivier Firmesse
The ability of Listeria monocytogenes to adhere to and persist on surfaces for months or even years may be responsible for its transmission from contaminated surfaces to food products. Hence the necessity to find effective means to prevent the establishment of L. monocytogenes in food processing environments. The aim of this study was to assess, through a fractional experimental design, the environmental factors that could affect the survival of L. monocytogenes cells on surfaces to thereby prevent the persistence of this pathogen in conditions mimicking those encountered in food processing plants: culture with smoked salmon juice or meat exudate, use of two materials with different hygiene status, biofilm of L...
December 21, 2016: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28063314/construction-of-pah-degrading-mixed-microbial-consortia-by-induced-selection-in-soil
#12
German Zafra, Ángel E Absalón, Miguel Ángel Anducho-Reyes, Francisco J Fernandez, Diana V Cortés-Espinosa
Bioremediation of polycyclic aromatic hydrocarbons (PAHs)-contaminated soils through the biostimulation and bioaugmentation processes can be a strategy for the clean-up of oil spills and environmental accidents. In this work, an induced microbial selection method using PAH-polluted soils was successfully used to construct two microbial consortia exhibiting high degradation levels of low and high molecular weight PAHs. Six fungal and seven bacterial native strains were used to construct mixed consortia with the ability to tolerate high amounts of phenanthrene (Phe), pyrene (Pyr) and benzo(a)pyrene (BaP) and utilize these compounds as a sole carbon source...
December 21, 2016: Chemosphere
https://www.readbyqxmd.com/read/28054766/uv-visible-infrared-light-driven-thermocatalysis-for-environmental-purification-on-ramsdellite-mno2-hollow-spheres-considerably-promoted-by-a-novel-photoactivation
#13
Yi Yang, Yuanzhi Li, Mingyang Mao, Min Zeng, Xiujian Zhao
Novel ramsdellite MnO2 hollow spheres consisting of closely stacked nanosheets (R-MnO2-HS) were synthesized by a facile method. The R-MnO2-HS sample was characterized with SEM, XRD, TEM, BET, XPS, diffusive reflectance UV-vis-IR absorption, etc. Remarkably, R-MnO2-HS exhibits highly efficient catalytic activity for the purification of benzene (a carcinogenic air pollutant) under the full solar spectrum or visible-infrared irradiation, even under the infrared irradiation. Its catalytic activity (initial CO2 production rate) under the full solar spectrum irradiation is as high as 210...
January 13, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28054589/large-scale-thick-self-assembled-nacre-mimetic-brick-walls-as-fire-barrier-coatings-on-textiles
#14
Paramita Das, Helga Thomas, Martin Moeller, Andreas Walther
Highly loaded polymer/clay nanocomposites with layered structures are emerging as robust fire retardant surface coatings. However, time-intensive sequential deposition processes, e.g. layer-by-layer strategies, hinders obtaining large coating thicknesses and complicates an implementation into existing technologies. Here, we demonstrate a single-step, water-borne approach to prepare thick, self-assembling, hybrid fire barrier coatings of sodium carboxymethyl cellulose (CMC)/montmorillonite (MTM) with well-defined, bioinspired brick-wall nanostructure, and showcase their application on textile...
January 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28051163/adaptable-bioinspired-special-wetting-surface-for-multifunctional-oil-water-separation
#15
Maryna N Kavalenka, Felix Vüllers, Jana Kumberg, Claudia Zeiger, Vanessa Trouillet, Sebastian Stein, Tanzila T Ava, Chunyan Li, Matthias Worgull, Hendrik Hölscher
Inspired by the multifunctionality of biological surfaces necessary for the survival of an organism in its specific environment, we developed an artificial special wetting nanofur surface which can be adapted to perform different functionalities necessary to efficiently separate oil and water for cleaning accidental oil spills or separating industrial oily wastewater. Initial superhydrophobic nanofur surface is fabricated using a hot pulling method, in which nano- and microhairs are drawn out of the polymer surface during separation from a heated sandblasted steel plate...
January 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28050814/what-orthopaedic-operating-room-surfaces-are-contaminated-with-bioburden-a-study-using-the-atp-bioluminescence-assay
#16
Raveesh Daniel Richard, Thomas R Bowen
BACKGROUND: Contaminated operating room surfaces can increase the risk of orthopaedic infections, particularly after procedures in which hardware implantation and instrumentation are used. The question arises as to how surgeons can measure surface cleanliness to detect increased levels of bioburden. This study aims to highlight the utility of adenosine triphosphate (ATP) bioluminescence technology as a novel technique in detecting the degree of contamination within the sterile operating room environment...
January 3, 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/28033494/forward-osmosis-as-an-approach-to-manage-oil-sands-tailings-water-and-on-site-basal-depressurization-water
#17
Shu Zhu, Mingyu Li, Mohamed Gamal El-Din
As the volume of oil sands process-affected water (OSPW) stored in tailings ponds increases, it is urgent to seek for water management approaches to alleviate the environmental impact caused by large quantity of toxic water. Forward osmosis (FO) utilizes osmotic pressure difference between two solutions, thereby giving a potential to manage two wastewaters. In this study, FO was proposed to manage OSPW, using on-site waste basal depressurization water (BDW) as draw solution. To investigate its feasibility, both short and long-term OSPW desalination experiments were carried out...
December 21, 2016: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28031695/mitigating-climate-change-at-the-carbon-water-nexus-a-call-to-action-for-the-environmental-engineering-community
#18
Andres F Clarens, Catherine A Peters
Environmental engineers have played a critical role in improving human and ecosystem health over the past several decades. These contributions have focused on providing clean water and air as well as managing waste streams and remediating polluted sites. As environmental problems have become more global in scale and more deeply entrenched in sociotechnical systems, the discipline of environmental engineering must grow to be ready to respond to the challenges of the coming decades. Here we make the case that environmental engineers should play a leadership role in the development of climate change mitigation technologies at the carbon-water nexus (CWN)...
October 1, 2016: Environmental Engineering Science
https://www.readbyqxmd.com/read/28024852/a-model-for-choosing-an-automated-ultraviolet-c-disinfection-system-and-building-a-case-for-the-c-suite-two-case-reports
#19
Maureen Spencer, Michelle Vignari, Elizabeth Bryce, Helen Boehm Johnson, Loretta Fauerbach, Denise Graham
Environmental disinfection has become the new frontier in the ongoing battle to reduce the risk of health care-associated infections. Evidence demonstrating the persistent contamination of environmental surfaces despite traditional cleaning and disinfection methods has led to the widespread acceptance that there is both a need for reassessing traditional cleaning protocols and for using secondary disinfection technologies. Ultraviolet-C (UV-C) disinfection is one type of no-touch technology shown to be a successful adjunct to manual cleaning in reducing environmental bioburden...
December 23, 2016: American Journal of Infection Control
https://www.readbyqxmd.com/read/28018577/the-burden-of-disease-from-air-pollution-in-israel-how-do-we-use-burden-estimates-to-advance-public-health
#20
EDITORIAL
Jonathan M Samet
In an article recently published in the IJHPR, Ginsberg and colleagues from Israel's Public Health Services estimate the disease burden from airborne particulate matter in Israel. Using national data on the concentration of PM2.5 (particulate matter less than 2.5 μm in aerodynamic diameter) and risk estimates from meta-analyses, they calculate that about 2000 deaths (4.7% of total deaths) are attributable to air pollution. Although inherently subject to uncertainty, such estimates are useful for motivating public health protection and gauging the stringency of any needed regulations...
2016: Israel Journal of Health Policy Research
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