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https://www.readbyqxmd.com/read/28338296/photochromism-and-dual-color-fluorescence-in-a-polyoxometalate-benzospiropyran-molecular-switch
#1
Arnaud Parrot, Aurélie Bernard, Aurélie Jacquart, Stefano Artin Serapian, Carles Bo, Etienne Derat, Olivier Oms, Anne Dolbecq, Anna Proust, Rémi Métivier, Pierre Mialane, Guillaume Izzet
The photophysical properties of a Keggin-type polyoxometalate (POM) covalently bounded to a benzospiropyran (BSPR) unit have been investigated. These studies reveal that both closed and open forms are emissive with distinct spectral features (λem (closed form)=530 nm, λem (open form)=670 nm) and that the fluorescence of the BSPR unit of the hybrid is considerably enhanced compared to BSPR parent compounds. While the fluorescence excitation energy of the BSPR reference compounds (370 nm) is close to the intense absorption responsible of the photochromic character (350 nm), the fluorescence excitation of the hybrid is shifted to lower energy (400 nm), improving the population of the emissive state...
March 24, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28318796/development-and-application-of-a-quantification-method-for-water-soluble-organosulfates-in-atmospheric-aerosols
#2
Gang Cao, Xiaopei Zhao, Di Hu, Rongshu Zhu, Feng Ouyang
In recent years, organosulfates have been found as a significant component of secondary organic aerosols from both smog chamber experiments and field measurements. In this study, an indirect method was developed to estimate organosulfates in aerosol particles as a whole based on their sulfate functional group. A series of experiments were conducted to optimize and validate the method, and it was then applied to quantify organosulfates in the aerosol samples collected at three sampling characteristic sites in Shenzhen, with one close to a power plant (PP), one at a heavy traffic intersection (HTI), and one on the campus of Harbin Institute of Technology Shenzhen graduate school (HITSZ)...
March 16, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28316917/a-comparative-study-of-syndecan-1-expression-in-different-odontogenic-tumors
#3
Shahroo Etemad-Moghadam, Mojgan Alaeddini
BACKGROUND: Expression of various cellular/molecular factors change during the course of tumor formation from odontogenic tissues of the tooth germ. Evaluation of these factors can help provide a better perception of the tumorigenesis and biologic behavior of odontogenic tumors (OTs). Syndecan-1 is a heparan sulfate proteoglycan which has not been extensively investigated in these lesions. The objective of the present study was to assess the immunohistochemical expression of CD138 in adenomatoid odontogenic tumor (AOT), ameloblastic fibroma (AF) and odontogenic myxoma (OM) and to compare it with ameloblastoma and keratocystic odontogenic tumor (KCOT)...
January 2017: Journal of Oral Biology and Craniofacial Research
https://www.readbyqxmd.com/read/28296470/more-declassified-evidence-implicates-c-i-a-physicians-in-unethical-research
#4
Renée Llanusa-Cestero
In 2010 in an article in these pages I argued that declassified documents implicated Central Intelligence Agency physicians in the conduct of unethical research on enhanced interrogation using detainee subjects. The focus, then as now, is upon physicians at the Office of Medical Services. The 2010 article highlighted the heavily redacted DRAFT OMS GUIDELINES ON MEDICAL AND PSYCHOLOGICAL SUPPORT TO DETAINEE INTERROGATIONS. This commentary focuses upon the recently declassified final version of that document revealing further culpable evidence of unethical human subject research...
March 15, 2017: Accountability in Research
https://www.readbyqxmd.com/read/28285049/adsorption-and-release-of-ampicillin-antibiotic-from-ordered-mesoporous-silica
#5
Valentina Nairi, Luca Medda, Maura Monduzzi, Andrea Salis
In this work the adsorption and the release of ampicillin - a β-lactam penicillin-like antibiotic - from MCM-41, SBA-15, and (amino functionalized) SBA-15-NH2 ordered mesoporous silica (OMS) materials were investigated. The silica matrices differ for their pore size (SBA-15 vs. MCM-41) mainly, and also for surface charge (SBA-15 and MCM-41, vs. SBA-15-NH2). OMS samples were characterized through small-angle X-rays scattering (SAXS), transmission electron microscopy (TEM), N2 adsorption-desorption isotherms, Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and potentiometric titrations...
July 1, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28279584/simulation-training-for-the-office-based-anesthesia-team
#6
REVIEW
Richard M Ritt, Jeffrey Bennett, David Todd
An OMS office is a complex environment. Within such an environment, a diverse scope of complex surgical procedures is performed with different levels of anesthesia, ranging from local anesthesia to general anesthesia, on patients with varying comorbidities. Optimal patient outcomes require a functional surgical and anesthetic team, who are familiar with both standard operational principles and emergency recognition and management. Offices with high volume and time pressure add further stress and potential risk to the office environment...
March 6, 2017: Oral and Maxillofacial Surgery Clinics of North America
https://www.readbyqxmd.com/read/28274776/corrigendum-to-chemokine-cytokine-profiling-after-rituximab-reciprocal-expression-of-bca-1-cxcl13-and-baff-in-childhood-oms-cytokine-53-2011-384-389
#7
Michael R Pranzatelli, Elizabeth D Tate, Anna L Travelstead, Steven J Verhulst
No abstract text is available yet for this article.
March 5, 2017: Cytokine
https://www.readbyqxmd.com/read/28274326/a-systematic-review-and-meta-analysis-of-outcome-measures-to-assess-postural-control-in-older-adults-who-undertake-exergaming
#8
REVIEW
Robin Tahmosybayat, Katherine Baker, Alan Godfrey, Nick Caplan, Gill Barry
Exergaming has been shown to be an effective tool to improve postural control (PC) in older community-dwelling individuals. The outcome measures (OMs) used to assess PC are varied and this could limit the estimation of the effectiveness of the intervention. This systematic review and meta-analysis aims to explore the OMs currently used to assess PC in exergaming interventions, for healthy elderly individuals aged over 60 years. The literature search was conducted across five databases (CINAHL, EMBASE, PubMed, ISI, SPORTdiscus and Science Direct) using a range of search terms and combinations relating to exergaming, balance, exercise, falls and elderly...
April 2017: Maturitas
https://www.readbyqxmd.com/read/28258920/odontogenic-sinusitis-maxillaris-a-retrospective-study-of-121-cases-with-surgical-intervention
#9
Matthias Zirk, Timo Dreiseidler, Matthias Pohl, Daniel Rothamel, Johannes Buller, Franziska Peters, Joachim E Zöller, Matthias Kreppel
PURPOSE: Otolaryngologists, dentists and maxilla-facial surgeons see patients suffering from odontogenic maxillary sinusitis on a daily routine. The study was performed to investigate the different origins of the odontogenic maxillary sinusitis ranging from periodontitis to augmentative implant surgery. Furthermore, the microbial flora of purulent odontogenic maxillary sinusitis was analyzed in order to present a proper antibiotic treatment in addition to a surgical approach. MATERIALS AND METHODS: A retrospective study was performed, analyzing the clinical trials of 121 patients suffering from odontogenic maxillary sinusitis who undergone surgery...
February 4, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28248522/interfacial-nanostructure-and-asymmetric-electrowetting-of-ionic-liquids
#10
Zhen Liu, Tong Cui, GuoZhu Li, Frank Endres
In this work, the interfacial nanostructure and electrowetting of ionic liquids having the same 1-ethyl-3-methylimidazolium cation ([EMIm](+)) but different anions such as bis(trifluoromethylsulfonyl)imide (TFSI(-)), trifluoromethylsulfonate (TfO(-)), methylsulfonate (OMs(-)), acetate (OAc(-)), bis(fluorosulfonyl)imide (FSI(-)), dicyanamide (DCA(-)), and tris(pentafluorethyl)trifluorphosphat (FAP(-)) on bare metallic electrodes were investigated. In the investigated voltammetric potential regime, the contact angle versus voltage curve is asymmetric with respect to surface polarity...
March 9, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28157637/synthesis-of-oms-2-graphite-nanocomposites-with-enhanced-activity-for-pollutants-degradation-in-the-presence-of-peroxymonosulfate
#11
Jia Fang, Jun Li, Long Gao, Xiwang Jiang, Jingwen Zhang, Aihua Xu, Xiaoxia Li
The octahedral molecular sieve manganese oxide (OMS-2) and graphite (Gt) composites (OMS-2/Gt) were prepared by a facile refluxing approach. The structure and morphology of the obtained materials were systematically investigated. The results reveal that OMS-2 nanofibers are uniformly dispersed on the surface of Gt, and the ratio of Mn(3+) species in OMS-2 increases lineally with the increase of Gt dosage. The catalytic activity of OMS-2/Gt was evaluated by the degradation of Acid Orange 7 (AO7) in the presence of peroxymonosulfate (PMS)...
May 15, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28157627/modeling-and-simulation-of-bacterial-outer-membranes-and-interactions-with-membrane-proteins
#12
REVIEW
Dhilon S Patel, Yifei Qi, Wonpil Im
The outer membrane (OM) of Gram-negative bacteria is composed of phospholipids in the periplasmic leaflet and lipopolysaccharides (LPS) in the external leaflet, along with β-barrel OM proteins (OMPs) and lipidated periplasmic lipoproteins. As a defensive barrier to toxic compounds, an LPS molecule has high antigenic diversity and unique combination of OM-anchored lipid A with core oligosaccharides and O-antigen polysaccharides, creating dynamic protein-LPS and LPS-LPS interactions. Here, we review recent efforts on modeling and simulation of native-like bacterial OMs to explore structures, dynamics, and interactions of different OM components and their roles in transportation of ions, substrates, and antibiotics across the OM and accessibility of monoclonal antibodies (mAbs) to surface epitopes...
January 31, 2017: Current Opinion in Structural Biology
https://www.readbyqxmd.com/read/28144661/manganese-containing-ionic-liquids-synthesis-crystal-structures-and-electrodeposition-of-manganese-films-and-nanoparticles
#13
Jeroen Sniekers, João C Malaquias, Luc Van Meervelt, Jan Fransaer, Koen Binnemans
Manganese(ii)-containing ionic liquids were synthesized, in which the manganese atoms are coordinated by glymes (diglyme, triglyme, tetraglyme), pyridine-N-oxide, dimethylsulfoxide or N-alkylimidazoles (N-methylimidazole, N-butylimidazole and N-hexylimidazole). As anion, bis(trifluoromethanesulfonyl)imide (bistriflimide, Tf2N(-)), trifluoromethanesulfonate (triflate, OTf(-)) or methanesulfonate (mesylate, OMs(-)) were used. The compounds were characterized by CHN analysis, FTIR, DSC and single-crystal X-ray diffraction measurements...
February 1, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28122220/refinement-of-oprh-lps-interactions-by-molecular-simulations
#14
Joonseong Lee, Dhilon S Patel, Iga Kucharska, Lukas K Tamm, Wonpil Im
The outer membrane (OM) of Gram-negative bacteria is composed of lipopolysaccharide (LPS) in the outer leaflet and phospholipids in the inner leaflet. The outer membrane protein H (OprH) of Pseudomonas aeruginosa provides an increased stability to the OMs by directly interacting with LPS. Here we report the influence of various P. aeruginosa and, for comparison, Escherichia coli LPS environments on the physical properties of the OMs and OprH using all-atom molecular dynamics simulations. The simulations reveal that although the P...
January 24, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/28102628/transient-symptomatic-worsening-by-atropine-in-opsoclonus-myoclonus-syndrome
#15
Hirotsugu Miyoshi, Ryuji Nakamura, Ayano Yamaga, Toshiaki Haraki, Toshimichi Yasuda, Hiroshi Hamada, Masashi Kawamoto
Opsoclonus-myoclonus syndrome (OMS) is characterized by abnormal eye and systemic involuntary movements, as well as cerebellar ataxia. Some sedatives and anesthetics worsen movements associated with OMS, while there is no known report of a negative effect of atropine. We report on sedation in two patients with OMS. Involuntary movements were transiently worsened after using atropine with midazolam or thiamylal in both, but were not seen when atropine was not used. We speculated that atropine has the potential to exacerbate involuntary movements in OMS due to vulnerability to this agent via unknown mechanisms...
January 2017: Pediatrics International: Official Journal of the Japan Pediatric Society
https://www.readbyqxmd.com/read/28095866/improvement-of-displacement-estimation-of-breast-tissue-in-ultrasound-elastography-using-the-monogenic-signal
#16
Taher Slimi, Ines Marzouk Moussa, Tarek Kraiem, Halima Mahjoubi
BACKGROUND: In breast ultrasound elastography, tissues displacements estimation is obtained through a technique that follows the evolution of tissues under stress. However, during the acquisition of B-mode images, tissue displacements are often contaminated with multiplicative noise caused by changes in the speckle pattern in the tissue. Thus, the application of monogenic signal technique on the B-mode image in order to estimate displacement tissue, result in a presence of amplified noise in the deformation tissue image, which severely obscures the useful information...
January 17, 2017: Biomedical Engineering Online
https://www.readbyqxmd.com/read/28063142/tuning-the-synthesis-of-manganese-oxides%C3%A2-nanoparticles-for-efficient-oxidation-of-benzyl-alcohol
#17
Jingyuan Fei, Lixian Sun, Cuifeng Zhou, Huajuan Ling, Feng Yan, Xia Zhong, Yuxiang Lu, Jeffrey Shi, Jun Huang, Zongwen Liu
The liquid phase oxidation of benzyl alcohol is an important reaction for generating benzaldehyde and benzoic acid that are largely required in the perfumery and pharmaceutical industries. The current production systems suffer from either low conversion or over oxidation. From the viewpoint of economy efficiency and environmental demand, we are aiming to develop new high-performance and cost-effective catalysts based on manganese oxides that can allow the green aerobic oxidation of benzyl alcohol under mild conditions...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28049680/career-and-professional-satisfaction-of-oral-and-maxillofacial-surgery-residents-academic-surgeons-and-private-practitioners-does-gender-matter
#18
Kyriaki C Marti, Jesse Lanzon, Sean P Edwards, Marita R Inglehart
The aims of this study were to determine whether male vs. female oral and maxillofacial surgery (OMS) residents, academic surgeons (i.e., faculty members), and private practitioners in the U.S. differed in their general career satisfaction and job/professional satisfaction. Survey data were collected in 2011-12 from 267 OMS residents (response rate 55%), 271 OMS academic surgeons (response rate 31%), and 417 OMS private practitioners (response rates 13% web-based survey and 29% postal mail survey). The results showed that while the male vs...
January 2017: Journal of Dental Education
https://www.readbyqxmd.com/read/28042788/-update-of-the-gleason-system-and-other-prognostic-pathological-data-in-prostate-cancer-tumor-load
#19
Ricardo García-González, Ricardo García-Navas, José Montáns-Araújo
Desde que D. F. Gleason creara su sistema en 1966 (1 ) y que él mismo modificó en 1974 (2), su método ha sido universalmente aceptado y recomendado por la OMS (3)como factor pronóstico del carcinoma prostático (CaP). Pero, la generalización de la prueba del PSA a partir de 1979 (4), del desarrollo de la TRUS (5) y de la "biopty-gun" para la toma de biopsias en sextantes en los años 80 (6), y sus posteriores modificaciones, son hechos que han cambiado paulatinamente la postura ante el CaP y, con la experiencia adquirida, algunas de las reglas iniciales de Gleason han evolucionado...
December 2016: Archivos Españoles de Urología
https://www.readbyqxmd.com/read/27986088/designing-and-screening-of-universal-drug-from-neem-azadirachta-indica-and-standard-drug-chemicals-against-influenza-virus-nucleoprotein
#20
Aftab Ahmad, Muhammad Rizwan Javed, Abdul Qayyum Rao, Tayyab Husnain
BACKGROUND: Different strains of influenza virus are affecting a large number of people worldwide. Many synthetic antiviral medicines are available for influenza virus in the market. But still there is a need for the development of universal drugs against these strains of influenza virus. METHODS: For this purpose conserved residues within the influenza virus nucleoprotein have been retrieved. The drugs, previously known to have antiviral properties, were screened to identify the best candidate universal drug against Influenza virus strains...
December 16, 2016: BMC Complementary and Alternative Medicine
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