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Clean room

Biswa Nath Bhadra, Pill Won Seo, Nazmul Abedin Khan, Sung Hwa Jhung
Two highly porous Co-based metal-azolate frameworks (MAFs), MAF-5(Co) and MAF-6(Co), which are isostructural with MAF-5(Zn) and MAF-6(Zn), respectively, were first synthesized in high yield and purity at room temperature. The syntheses compared two mixing methods, slow and fast, using cobalt acetate as the metal ion (Co(2+)) source and 2-ethylimidazole as the ligand. Triethylamine was applied as an additive/promoter in aqueous/ethanol solutions, and benzene and cyclohexane were used as hydrophobic templates...
October 20, 2016: Inorganic Chemistry
Kechao Tang, Andrew C Meng, Ravi Droopad, Paul C McIntyre
Intentional oxidation of an As2-decapped (100) In0.57Ga0.43As substrate by additional H2O dosing during initial Al2O3 gate dielectric atomic layer deposition (ALD) increases the interface trap density (Dit), lowers the band edge photoluminescence (PL) intensity, and generates Ga-oxide detected by x-ray photoelectron spectroscopy (XPS). Aberration-corrected high resolution transmission electron microscopy (TEM) reveals formation of an amorphous interfacial layer which is distinct from the Al2O3 dielectric and which is not present without the additional H2O dosing...
October 19, 2016: ACS Applied Materials & Interfaces
Wenjin Yang, Baodan Liu, Tao Fang, Weimmerskirch-Aubatin Jennifer, Labbé Christophe, Zhaosheng Li, Xinglai Zhang, Xin Jiang
Two-dimensional semiconductors with layer thicknesses of a few nanometers to tens of nanometers have attracted tremendous research interest due to their fascinating electrical, optical, and optoelectronic properties and technologically important applications. In this work, two dimensional ternary ZnIn2S4 nanosheets which self-assemble into microflowers have been synthesized through a feasible chemical vapour deposition process. High-resolution transmission electron microscope (HRTEM) analysis reveals that the ZnIn2S4 nanostructure exhibits an extremely high phase purity and a single crystal nature free of dislocations, stacking faults or twins...
October 18, 2016: Nanoscale
F Gorrini, M Cazzanelli, N Bazzanella, R Edla, M Gemmi, V Cappello, J David, C Dorigoni, A Bifone, A Miotello
Nanodiamonds are the subject of active research for their potential applications in nano-magnetometry, quantum optics, bioimaging and water cleaning processes. Here, we present a novel thermodynamic model that describes a graphite-liquid-diamond route for the synthesis of nanodiamonds. Its robustness is proved via the production of nanodiamonds powders at room-temperature and standard atmospheric pressure by pulsed laser ablation of pyrolytic graphite in water. The aqueous environment provides a confinement mechanism that promotes diamond nucleation and growth, and a biologically compatible medium for suspension of nanodiamonds...
October 12, 2016: Scientific Reports
Xi-Hui Xu Qin He, Fan Zhang, Yu-Kai Tai, Yan-Fei Luo, Jian He, Qing Hong, Jian-Dong Jiang, Xin Yan
BACKGROUND: To reduce the fermentation cost for industrialization of chlorothalonil hydrolytic dehalogenase (Chd), agro-industrial wastewater including molasses, corn steep liquor (CSL) and fermentation wastewater were used to substitute the expensive carbon and nitrogen sources and fresh water for lab preparation. RESULTS: The results showed that molasses and CSL could replace 5% carbon source and 100% organic nitrogen source to maintain the same fermentation level...
October 8, 2016: Journal of the Science of Food and Agriculture
Andrea Monas, Krunoslav Užarević, Ivan Halasz, Marina Juribašić Kulcsár, Manda Ćurić
Room-temperature accelerated aging in the solid state has been applied for atom- and energy-efficient activation of either one or two C-H bonds of azobenzene and methyl orange by palladium(ii) acetate. Organopalladium complexes are prepared in quantitative reactions without potentially harmful side products. Dicyclopalladated methyl orange is water-soluble and is a selective chromogenic biothiol sensor at physiologically-relevant micromolar concentrations in buffered aqueous media.
September 9, 2016: Chemical Communications: Chem Comm
David A Pegues, Jennifer Han, Cheryl Gilmar, Brooke McDonnell, Steven Gaynes
OBJECTIVE To evaluate the impact of no-touch terminal room no-touch disinfection using ultraviolet wavelength C germicidal irradiation (UVGI) on C. difficile infection (CDI) rates on inpatient units with persistently high rates of CDI despite infection control measures. DESIGN Interrupted time-series analysis with a comparison arm. SETTING 3 adult hematology-oncology units in a large, tertiary-care hospital. METHODS We conducted a 12-month prospective valuation of UVGI. Rooms of patients with CDI or on contact precautions were targeted for UVGI upon discharge using an electronic patient flow system...
October 6, 2016: Infection Control and Hospital Epidemiology
Xian-Min Chen, Xiao-Shan Ning, Yan-Biao Kang
An aerobic acetoxyhydroxylation of alkenes cooperatively catalyzed by organic nitrite and palladium at room temperature using clean and cheap air as the sole oxidant has been developed. Various vicinal diols, diacetoxyalkanes, and dihalogenoalkanes have been synthesized. The gram-scale synthesis has also been approached. Vicinal difluorination and dichlorolation products have also been achieved via this reaction.
October 5, 2016: Organic Letters
Xiao Wang, Ranran Wang, Haitao Zhai, Xi Shen, Tao Wang, Liangjing Shi, Richeng Yu, Jing Sun
Cu nanowires (Copper nanowires) have attracted lots of attention recently due to their potential applications in transparent electrodes, SERS sensors and solar cells. However, as the surface composition and morphology of Cu nanowires severely influence the performance of the devices based on them, facial surface modification methods need to be developed. Herein, we propose a room-temperature, time-saving aqueous solution method, which can simultaneously clean the surface of copper nanowires and decorate them with Ag nanoparticles at room temperature without any atmospheric control...
October 5, 2016: ACS Applied Materials & Interfaces
Izabella J Hidi, Jan Heidler, Karina Weber, Dana Cialla-May, Jürgen Popp
Monitoring the successful removal of antibiotics in waste and surface waters is of high interest to overcome the occurrence of antibacterial resistance in the ecosystem. Among the newly developed analytical methods, the lab-on-a-chip surface-enhanced Raman spectroscopic (LoC-SERS) technique has gained the interest of the scientific community in the last few years. Ciprofloxacin, a second-generation fluoroquinolone, is widely used and administered to patients in dosages up to 1000 mg. In addition, more than 50 % of the antibiotic is excreted in urine as the parental drug...
October 3, 2016: Analytical and Bioanalytical Chemistry
Philippe Babilotte
Among the several aspects involved into the synthesis of monocharged nitrogene-vacancy N V (-) colored centers produced into nanodiamonds ND, the post-annealing cleaning process, such as sulfo-nitric acid cleaning or thermal oxidation under acid conditions, can be seen as a factor impacting the optical response of these N V (-) colored centers. A significative difference of optical response is in fact noticed modifying the post-annealing treatment conditions, between a pure oxidative treatment at room temperature and a mixed-process including oxidation and thermal activation...
September 30, 2016: Journal of Fluorescence
Ronja M Malinowski, Kasper W Lipsø, Mathilde H Lerche, Jan H Ardenkjær-Larsen
Signal enhancement by hyperpolarization is a way of overcoming the low sensitivity in magnetic resonance; MRI in particular. One of the most well-known methods, dissolution Dynamic Nuclear Polarization, has been used clinically in cancer patients. One way of ensuring a low bioburden of the hyperpolarized product is by use of a closed fluid path that constitutes a barrier to contamination. The fluid path can be filled with the pharmaceuticals, i.e. imaging agent and solvents, in a clean room, and then stored or immediately used at the polarizer...
September 22, 2016: Journal of Magnetic Resonance
Shannon M Hinsa-Leasure, Queenster Nartey, Justin Vaverka, Michael G Schmidt
OBJECTIVE: To assess the ability of copper alloy surfaces to mitigate the bacterial burden associated with commonly touched surfaces in conjunction with daily and terminal cleaning in rural hospital settings. DESIGN: A prospective intention-to-treat trial design was used to evaluate the effectiveness of cooper alloy surfaces and respective controls to augment infection control practices under pragmatic conditions. SETTING: Half of the patient rooms in the medical-surgical suite in a 49-bed rural hospital were outfitted with copper alloy materials...
September 21, 2016: American Journal of Infection Control
Brigitte Barrois, Olivier Remy Neris, Pierre-Alain Joseph, Marc Genty, Michel Enjalbert, Olivier Jonquet, Thierry Lavigne, Claude Jeandel, Catherine Chapuis, Bruno Grandbastien, Elise Seringe, Benoit Nicolas, Jean-Ralph Zahar, Laurent Thefenne, Nacera Bradai, Philippe Saliou, Julia Facione-Roger, Hugues Aumaitre, Fabrice Mairot
Infectious risk and crossing transmission: which guidelines? Crossing transmission risk is important in SSR wards, although patients have few invasive acts but are moving. A piloting group chose 6 questions. Two experts analyzed each question, bibliographic analysis to look for formal guidelines, convincing elements and persistent questions. Those results were discussed during an expert conference to develop best practices guidelines for rehabilitation organization in SSR ward: - for SSR patients, can we define clinical and microbiological characteristics enable to improve crossing transmission risk? disease? Microbiological location?; - for patients with BMR or BHR bacteria, how can we use, organize and manage technical tools (architecture, tools, group work, swimming pools, cleaning) to reduce crossing transmission risk?; - for patients with BMR or BHR bacteria, how can we organize patients transfers out of room? To technical tools? To common places (restaurant, lounge), to home return (permission included) or to reduce crossing transmission risk?; - for patients with BMR or BHR bacteria (contact or bearer), how can SSR professional organize to reduce crossing transmission risk? Coordination between professionals, care planning, choice and use of tools and techniques…; - to reduce crossing transmission risk, what are located units, clinical and biological screening units, follow up BMR and BHR?; - for patients with BMR or BHR bacteria (contact or bearer), how information transmission can improve before, during and after SSR stay? Short guidelines will be held during next conference and long guidelines will be totally written...
September 2016: Annals of Physical and Rehabilitation Medicine
Clare Rock, Sara E Cosgrove, Sara C Keller, Heather Enos-Graves, Jennifer Andonian, Lisa L Maragakis, Ayse P Gurses, Anping Xie
No abstract text is available yet for this article.
September 26, 2016: Infection Control and Hospital Epidemiology
Kumara V Nibhanipudi
OBJECTIVE: To determine the incidence of urinary tract infections (UTIs) in infants and children (4 months to 6 years of age) with febrile diarrhea, as outpatients. METHODS: This was a prospective institutional review board-approved study. patients (between 4 months and 6 years of age) were enrolled in the study who presented to the pediatric emergency room with a complaint of fever (rectal temperature 101°F or more) and diarrhea (watery stools >3 in number)...
2016: Global Pediatric Health
Veaceslav Arabagi, Ouajdi Felfoul, Andrew H Gosline, Robert J Wood, Pierre E Dupont
This paper presents 800-μm thick, biocompatible sensing skins composed of arrays of pressure sensors. The arrays can be configured to conform to the surface of medical instruments so as to act as disposable sensing skins. In particular, the fabrication of cylindrical geometries is considered here for use on endoscopes. The sensing technology is based on polydimethylsiloxane synthetic silicone encapsulated microchannels filled with a biocompatible salt-saturated glycerol solution, functioning as the conductive medium...
March 2016: IEEE Sensors Journal
Sarwat Chowdhury, Robert F Standaert
Primary alcohols can be deoxygenated cleanly and in yields of 60-95% by reduction of derived diphenyl phosphate esters with lithium triethylborohydride in tetrahydrofuran at room temperature. Selective deoxygenation of a primary alcohol in the presence of a secondary alcohol was demonstrated. The two-step process can be performed in one pot, making it simple and convenient.
October 21, 2016: Journal of Organic Chemistry
N Costarramone, C Cantau, V Desauziers, C Pécheyran, T Pigot, S Lacombe
At the European level (CEN/TC386), some efforts are currently devoted to new standards for comparing the efficiency of commercial photocatalytic material/devices in various application fields. Concerning prototype or commercial indoor photocatalytic air purifiers designed for volatile organic compounds (VOC) abatement, the methodology is based on a laboratory airtight chamber. The photocatalytic function is demonstrated by the mineralization of a mixture of five VOCs. Experimental data were obtained for four selected commercial devices and three commercial materials: drop of VOC concentration, but also identification of secondary species (with special attention to formaldehyde), mineralization rates, and Clean Air Delivery Rate (CADR)...
September 15, 2016: Environmental Science and Pollution Research International
Antonia F Chen, Meredith Menz, Priscilla K Cavanaugh, Javad Parvizi
PURPOSE: This prospective study was designed to determine whether exposure of intraoperative tissue samples to the operating room environment affects subsequent culture results. METHODS: A prospective study conducted on 125 patients undergoing primary total knee arthroplasty was conducted from August 2013 to December 2015. During surgery, three samples from the infrapatellar fat pad were obtained. The first sample was obtained using clean instruments and placed directly into a specimen cup (direct)...
October 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
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