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https://www.readbyqxmd.com/read/28395348/exposure-assessment-in-a-single-walled-carbon-nanotube-primary-manufacturer
#1
Serge Kouassi, Cyril Catto, Claude Ostiguy, Gilles L'Espérance, Jens Kroeger, Maximilien Debia
Objectives: This study was aimed at documenting and characterizing occupational exposure to single-walled carbon nanotubes (SWCNTs) generated in a primary manufacturing plant. It also compared various strategies of exposure monitoring. Methods: A 6-day measurement protocol was scheduled (D1-D6) including both (i) quasi-personal monitoring with an array of direct reading instruments (DRIs) and (ii) offline electron microscopy analyses of surface and breathing zone filter-based samples...
March 1, 2017: Annals of Work Exposures and Health
https://www.readbyqxmd.com/read/28390200/comparative-plaque-removal-efficacy-of-three-manual-toothbrushes
#2
A Ghassemi, L Vorwerk, W Hooper, M Kwang, M Naji, C R Goyal, J Qaqish
OBJECTIVES: The purpose of this study was to determine the safety and plaque-reducing effectiveness of a newly designed manual toothbrush compared to that of a leading marketed toothbrush and a reference standard manual toothbrush control. METHODS: This examiner-blind, randomized, single-use study used a cross-over design. Sixty-eight qualifying male and female subjects were randomly assigned either an Arm & Hammer™ Truly Radiant™ Deep Clean manual toothbrush (TR), a Colgate® Extra Clean manual toothbrush (C), or an ADA reference standard manual toothbrush (SM) according to one of three computer-generated sequences...
September 2016: Journal of Clinical Dentistry
https://www.readbyqxmd.com/read/28387406/virus-directed-formation-of-electrocatalytically-active-nanoparticle-based-co3o4-tubes
#3
A S Schenk, S Eiben, M Goll, L Reith, A N Kulak, F C Meldrum, H Jeske, C Wege, S Ludwigs
Spinel-type Co3O4 finds applications in a wide range of fields, including clean energy conversion, where nanostructured Co3O4 may provide a cost-efficient alternative to platinum- and iridium-based catalysts for electrocatalytic water-splitting. We here describe a novel strategy in which basic cobalt carbonate - a precursor to Co3O4 - is precipitated as sheet-like structures and microspheres covered with fine surface protrusions, via ammonium carbonate decomposition at room temperature. Importantly, these mild reaction conditions enable us to employ bio-inspired templating approaches to further control the mineral structure...
April 7, 2017: Nanoscale
https://www.readbyqxmd.com/read/28380265/how-do-i-participate-in-t-cell-immunotherapy
#4
Megan M Suhoski Davis, David H McKenna, Philip J Norris
T cells play a key role in the adaptive immune response, and the ability to manipulate T cells for therapeutic uses has advanced in the past decade. Infusion of expanded or engineered T cells can potentially be used to treat cancer, viral infections, graft-versus-host disease, and organ transplant rejection. The role that blood banks play in the manufacture and distribution of T-cell therapeutics is still being defined. Given the regulatory framework of blood banks, they are well positioned to collect raw material for manufacture of T-cell therapies and to distribute finished product to hospitals in support of clinical trials or eventually for licensed products...
May 2017: Transfusion
https://www.readbyqxmd.com/read/28370808/dehydrogenative-b-h-c-sp-3-h-benzylic-borylation-within-the-coordination-sphere-of-platinum-ii
#5
Colin M Kelly, Jack T Fuller, Casper M Macaulay, Robert McDonald, Michael J Ferguson, Steven M Bischof, Orson L Sydora, Daniel H Ess, Mark Stradiotto, Laura Turculet
The first examples of stoichiometric dehydrogenative B-H/C(sp(3) )-H benzylic borylation reactions, which are of relevance to catalytic methylarene (di)borylation, are reported. These unusual transformations involving a (κ(2) -P,N)Pt(η(3) -benzyl) complex, and either pinacolborane or catecholborane, proceed cleanly at room temperature. Density functional calculations suggest that borylation occurs via successive σ-bond metathesis steps, whereby a Pt(II) -H intermediate engages in C(sp(3) )-H bond activation-induced dehydrogenation...
March 30, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28370567/vertically-oriented-and-tailored-shape-electro-catalytic-metallic-nanowires-for-galactosemia-free-enzyme-rapid-diagnosis
#6
Laura García Carmona, María Cristina González, Alberto Escarpa
Metallic catalytic nanowires such as nickel and copper nanowires (NWs) for electrochemical detection of carbohydrates involved in metabolic rare diseases are proposed. NWs were electrodeposited using a poly carbonate membrane template, which was cut with the desired shape, stuck in double-sided adhesive tape, pasted into a non-conductive substrate and in situ removed. This simple and versatile approach allowed to obtain NWs vertically oriented (v-NWs) which are contained in the double-sided adhesive tape becoming highly versatile...
April 3, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28367872/detection-method-for-aquatic-bacteria-of-the-fingers-as-a-potential-origin-of-the-aqueous-solution-contamination
#7
Eiichi Osono, Kazumi Honda, Yuki Inoue, Yoshihiko Norose, Megumi Takahashi, Kyoko Ichimura, Chisako Kamano, Eiji Shinya, Shun Takaku, Kentaro Okamatsu, Shinya Kawamoto, Hideaki Takizawa, Hidemi Takahashi
 Aquatic bacteria were isolated from the hands of working staffs by an adapted culture protocol. When the sample solution obtained by the" glove juice method" was incubated for 3 days at room temperature, viable cell counts increased up to 10(5)-fold, and the majority of the isolated colonies were shown to be Gram-negative aquatic bacteria, which carry the risk of contaminating water. Using R2A medium, coagulase-negative staphylococci were the dominant microbes immediately after recovery from the hands. Here it was revealed that bacteria of the phylum Proteobacteria isolated from the hand can be the causative bacteria of aqueous contamination...
2017: Biocontrol Science
https://www.readbyqxmd.com/read/28364645/laboratory-investigation-of-pcb-bake-out-from-tertiary-contaminated-concrete-for-remediation-of-buildings
#8
Barbara Kolarik, Helle Vibeke Andersen, Marie Frederiksen, Lars Gunnarsen
Polychlorinated biphenyls (PCBs) have been used in flexible construction products from the 1950s to the 1970s. Despite a relatively low vapour pressure, PCBs have over the years emitted to the indoor air and adsorbed to other surfaces, creating tertiary sources. While necessary to protect the environment and health of building occupants, remediation of the contaminated buildings is an expensive and difficult process. The aim of this study was to investigate the effect of bake-out as a method for removing PCB from contaminated indoor surfaces...
March 25, 2017: Chemosphere
https://www.readbyqxmd.com/read/28341262/pulsed-xenon-ultraviolet-light-disinfection-in-a-burn-unit-impact-on-environmental-bioburden-multidrug-resistant-organism-acquisition-and-healthcare-associated-infections
#9
Caroline Green, Jeremy C Pamplin, Kristine N Chafin, Clinton K Murray, Heather C Yun
Portable pulsed xenon ultraviolet disinfection (PPX-UVD) may reduce healthcare associated infections (HAI). There is limited data to inform use in burn intensive care units (BICU), where multidrug-resistant organisms (MDRO), especially gram negative rods (GNR), commonly cause disease. We evaluated PPX-UVD effects on environmental bioburden and rates of HAI and MDRO acquisition in a BICU. PPX-UVD was used for 3 months after standard cleaning of patient and operating rooms (ORs). Settle and touch plates in patient rooms and ORs were obtained after standard cleaning, pre-and post-PPX-UVD...
March 2017: Burns: Journal of the International Society for Burn Injuries
https://www.readbyqxmd.com/read/28340080/measuring-pm2-5-ultrafine-particles-air-nicotine-and-wipe-samples-following-the-use-of-electronic-cigarettes
#10
Paul Melstrom, Bartosz Koszowski, Meridith Hill Thanner, Eunha Hoh, Brian King, Rebecca Bunnell, Tim McAfee
Background: Few studies have examined the extent of inhalation or dermal contact among bystanders following short-term, secondhand e-cigarette exposure. Objective: Measure PM2.5 (particles <2.5 microns), UF (ultrafine particles <100nm), and nicotine in air and deposited on surfaces and clothing pre-/during/post- a short-term (two-hour) e-cigarette exposure. Methods: E-cigarettes were used ad libitum by three experienced users for two hours during two separate sessions (disposable e-cigarettes, then tank-style e-cigarettes, or "tanks") in a 1858ft3 room...
March 9, 2017: Nicotine & Tobacco Research: Official Journal of the Society for Research on Nicotine and Tobacco
https://www.readbyqxmd.com/read/28336247/surgical-case-order-has-an-effect-on-the-risk-of-subsequent-periprosthetic-joint-infection
#11
Antonia F Chen, Michael M Kheir, Joshua M Greenbaum, Camilo Restrepo, Mitchell G Maltenfort, Javad Parvizi
BACKGROUND: Periprosthetic joint infection (PJI) after total joint arthroplasty (TJA) is a serious complication with multiple etiologies. Prior spine literature has shown that later cases in the day were more likely to develop surgical site infection. However, the effect of case order on PJI after TJA is unknown. This study aims to determine the influence of case order, prior infected case, and terminal cleaning on the risk for a subsequent PJI. METHODS: A retrospective, single-institution study was conducted on 31,499 TJAs performed from 2000 to 2014...
February 20, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28331347/environmental-triggers-and-avoidance-in-the-management-of-asthma
#12
REVIEW
Clarisse Gautier, Denis Charpin
Identifying asthma triggers forms the basis of environmental secondary prevention. These triggers may be allergenic or nonallergenic. Allergenic triggers include indoor allergens, such as house dust mites (HDMs), molds, pets, cockroaches, and rodents, and outdoor allergens, such as pollens and molds. Clinical observations provide support for the role of HDM exposure as a trigger, although avoidance studies provide conflicting results. Molds and their metabolic products are now considered to be triggers of asthma attacks...
2017: Journal of Asthma and Allergy
https://www.readbyqxmd.com/read/28319476/anesthesia-in-patients-with-infectious-disease-caused-by-multi-drug-resistant-bacteria
#13
Sharon Einav, Yonit Wiener-Well
PURPOSE OF REVIEW: Up to 50% of specific bacterial strains in healthcare admission facilities are multidrug-resistant organisms (MDROs). Involvement of anesthesiologists in management of patients carrying/at risk of carrying MDROs may decrease transmission in the Operating Room (OR). RECENT FINDINGS: Anesthesiologists, their work area and tools have all been implicated in MDRO outbreaks. Causes include contamination of external ventilation circuits and noncontribution of filters to prevention, inappropriate decontamination procedures for nondisposable equipment (e...
March 17, 2017: Current Opinion in Anaesthesiology
https://www.readbyqxmd.com/read/28300019/clostridium-difficile-infection-in-acute-care-hospitals-systematic-review-and-best-practices-for-prevention
#14
Irene K Louh, William G Greendyke, Emilia A Hermann, Karina W Davidson, Louise Falzon, David K Vawdrey, Jonathan A Shaffer, David P Calfee, E Yoko Furuya, Henry H Ting
OBJECTIVE Prevention of Clostridium difficile infection (CDI) in acute-care hospitals is a priority for hospitals and clinicians. We performed a qualitative systematic review to update the evidence on interventions to prevent CDI published since 2009. DESIGN We searched Ovid, MEDLINE, EMBASE, The Cochrane Library, CINAHL, the ISI Web of Knowledge, and grey literature databases from January 1, 2009 to August 1, 2015. SETTING We included studies performed in acute-care hospitals. PATIENTS OR PARTICIPANTS We included studies conducted on hospitalized patients that investigated the impact of specific interventions on CDI rates...
April 2017: Infection Control and Hospital Epidemiology
https://www.readbyqxmd.com/read/28282101/chitosan-nanostructures-by-in-situ-electrospinning-for-high-efficiency-pm2-5-capture
#15
Bin Zhang, Zhi-Guang Zhang, Xu Yan, Xiao-Xiong Wang, Hui Zhao, Jia Guo, Ji-Yong Feng, Yun-Ze Long
Nanofiber-based air filters and electrostatic precipitation have stimulated considerable interest because of their high-efficiency for PM2.5 capture. In this paper, we introduce a new method of in situ electrospinning (e-spinning) of nanostructures into a polluted enclosed space to efficiently clean the air. From the comparisons of different polymer precursors and different PM2.5 capture techniques, it can be seen that in situ e-spinning of chitosan aqueous solution into the air exhibits the best PM2.5 capture efficiency, which may be attributed to the stronger polarity of chitosan and the synergistic effect of the strong electrostatic adsorption and surface adhesion of the electrospun (e-spun) nanofibers...
March 10, 2017: Nanoscale
https://www.readbyqxmd.com/read/28279576/ultra-low-background-and-environmental-measurements-at-laboratorio-subterr%C3%A3-neo-de-canfranc-lsc
#16
I Bandac, S Borjabad, A Ianni, R Nuñez-Lagos, C Pérez, S Rodríguez, J A Villar
To support the construction of experiments at the Laboratorio Subterráneo de Canfranc (LSC) in Spain, an Ultra-Low Background Service (ULBS) and a Copper Electroforming Service (CES) were created. The measurement technique employed at the ULBS is gamma spectroscopy with high purity germanium (HPGe) detectors. A new anti-radon system is being implemented. The main goal of CES is to obtain high-purity copper pieces. A new electroforming set-up inside LSC underground clean room is planned. Radon and environmental measurements at the LSC are presented...
March 4, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/28277035/ultrastructural-study-of-liver-and-lead-tissue-concentrations-in-young-mallard-ducks-anas-platyrhynchos-after-ingestion-of-single-lead-shot
#17
Alain Pineau, Bernard Fauconneau, Eric Plouzeau, Béatrice Fernandez, Nathalie Quellard, Pierre Levillain, Olivier Guillard
Lead (Pb) represents a serious threat to wildlife and ecosystems. The aim of this study was to examine the subcellular effects of dietary Pb pellet ingestion on mallard (Anas platyrhynchos) livers. After ingestion of a single Pb shot (LS4 size class: 0.177 ± 0.03 g) in 41 mallard ducks (22 males and 19 females) versus 10 controls (5 males and 5 females) all 7-week old, a morphologic study was conducted by TEM (transmission electron microscopy) of liver at the subcellular level. The results in treated mallards showed at a magnification of 2 500 X that hepatic parenchyma was altered as evidenced by intralysosomal electron-dense deposits, which are compatible with Pb deposits...
February 22, 2017: Journal of Toxicology and Environmental Health. Part A
https://www.readbyqxmd.com/read/28253849/evaluation-of-an-ultraviolet-room-disinfection-protocol-to-decrease-nursing-home-microbial-burden-infection-and-hospitalization-rates
#18
Christine R Kovach, Yavuz Taneli, Tammy Neiman, Elaine M Dyer, Alvin Jason A Arzaga, Sheryl T Kelber
BACKGROUND: The focus of nursing home infection control procedures has been on decreasing transmission between healthcare workers and residents. Less evidence is available regarding whether decontamination of high-touch environmental surfaces impacts infection rates or resident outcomes. The purpose of this study was to examine if ultraviolet disinfection is associated with changes in: 1) microbial counts and adenosine triphosphate counts on high-touch surfaces; and 2) facility wide nursing home acquired infection rates, and infection-related hospitalization...
March 3, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28252956/cationic-and-neutral-cp-m-no-%C3%AE%C2%BA-2-ph2pch2ch2pph2-complexes-of-molybdenum-and-tungsten-lewis-acid-induced-intramolecular-c-h-activation
#19
Rex C Handford, Russell J Wakeham, Brian O Patrick, Peter Legzdins
Treatment of CH2Cl2 solutions of Cp*M(NO)Cl2 (Cp* = η(5)-C5(CH3)5; M = Mo, W) first with 2 equiv of AgSbF6 in the presence of PhCN and then with 1 equiv of Ph2PCH2CH2PPh2 affords the yellow-orange salts [Cp*M(NO)(PhCN)(κ(2)-Ph2PCH2CH2PPh2)](SbF6)2 in good yields (M = Mo, W). Reduction of [Cp*M(NO)(PhCN)(κ(2)-Ph2PCH2CH2PPh2)](SbF6)2 with 2 equiv of Cp2Co in C6H6 at 80 °C produces the corresponding 18e neutral compounds, Cp*M(NO)(κ(2)-Ph2PCH2CH2PPh2) which have been isolated as analytically pure orange-red solids...
March 2, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28244579/prevention-of-healthcare-associated-infections-a-descriptive-study
#20
R Accardi, S Castaldi, A Marzullo, S Ronchi, D Laquintana, M Lusignani
BACKGROUND: This study aims to verify whether there are, and to which degree, knowledge and adherence to guidelines on the prevention and control of healthcare associated infections by nursing staff. Study design. A descriptive study was conducted on a sample of nurses in the areas of medicine, surgery, and its own specialties of the Istituto di Ricovero e Cura a Carattere Scientifico Ca' Granda Ospedale Maggiore Policlinico in Milan from 1st December 2015 to 29th February 2016. METHODS: The knowledge of the nursing staff have been investigated through the use of questionnaires with anonymous self-reporting method; inspections in the wards using observational grids were carried out in order to verify adherence to best-practice principles...
March 2017: Annali di Igiene: Medicina Preventiva e di Comunità
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