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https://www.readbyqxmd.com/read/28324713/monolithic-cobalt-doped-carbon-aerogel-for-efficient-catalytic-activation-of-peroxymonosulfate-in-water
#1
Peidong Hu, Mingce Long, Xue Bai, Cheng Wang, Caiyun Cai, Jiajun Fu, Baoxue Zhou, Yongfeng Zhou
As an emerging carbonaceous material, carbon aerogels (CAs) display a great potential in environmental cleanup. In this study, a macroscopic three-dimensional monolithic cobalt-doped carbon aerogel was developed by co-condensation of graphene oxide sheets and resorcinol-formaldehyde resin in the presence of cobalt ions, followed by lyophilization, carbonization and thermal treatment in air. Cobalt ions were introduced as a polymerization catalyst to bridge the organogel framework, and finally cobalt species were retained as both metallic cobalt and Co3O4, wrapped by graphitized carbon layers...
March 6, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28324655/tracking-the-energy-flow-on-nanoscale-via-sample-transmitted-excitation-photoluminescence-spectroscopy
#2
Pavel Moroz, Natalia Razgoniaeva, Yufan He, Gregory Jensen, Holly Eckard, H Peter Lu, Mikhail Zamkov
Tracking the energy flow in nanoscale materials is an important yet challenging goal. Experimental methods for probing the intermolecular energy transfer (ET) are often burdened by the spectral crosstalk between donor and acceptor species, which complicates unraveling their individual contributions. This issue is particularly prominent in inorganic nanoparticles and biological macromolecules featuring broad absorbing profiles. Here, we demonstrate a general spectroscopic strategy for measuring the energy transfer efficiency between nanostructured or molecular dyes exhibiting a significant donor-acceptor spectral overlap...
March 21, 2017: ACS Nano
https://www.readbyqxmd.com/read/28324621/quantum-chemical-dissection-of-the-shortest-p-o%C3%A2-%C3%A2-%C3%A2-i-halogen-bond-the-decisive-role-of-crystal-packing-effects
#3
Milan Kivala, Tobias A Schaub, Rebecca Sure, Frank Hampel, Stefan Grimme
We report on a supramolecular arrangement comprising a bridged triarylphoshine oxide and an aryl iodide that features the shortest ever reported P=O···I halogen bond of 2.683(5) Å in the solid state. X-ray crystallographic analysis together with modern quantum chemical methods were enlisted to dissect the individual contributions that compelled this exceptionally short halogen bond pointing out the decisive role of crystal packing effects.
March 21, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28324199/high-hiv-prevalence-and-risk-among-male-clients-of-female-sex-workers-in-hanoi-and-ho-chi-minh-city-vietnam
#4
Patrick Nadol, Tran Vu Hoang, Linh-Vi Le, Tuan Anh Nguyen, John Kaldor, Matthew Law
In Vietnam's concentrated HIV epidemic, female sex workers (FSWs) are at increased risk for acquiring and transmitting HIV, largely through their male clients. A high proportion of males in Vietnam report being clients of FSWs. Studying HIV-related risk factors and prevalence among male clients is important, particularly given the potential for male clients to be a 'bridge' of HIV transmission to the more general population or to sex workers. Time-location sampling was used to identify FSW in Hanoi and Ho Chi Minh City, Vietnam's largest cities, in 2013-2014...
March 21, 2017: AIDS and Behavior
https://www.readbyqxmd.com/read/28323818/teaching-broader-impacts-of-science-with-undergraduate-research
#5
Kenneth C Keiler, Kathy L Jackson, Leslie Jaworski, David Lopatto, Sarah E Ades
Science plays an important role in most aspects of society, and scientists face ethical decisions as a routine part of their work, but science education frequently omits or segregates content related to ethics and broader impacts of science. Undergraduate research experiences have the potential to bridge traditional divides in education and provide a holistic view of science. In practice, these experiences can be inconsistent and may not provide the optimal learning environment. We developed a course that combines seminar and independent research elements to support student learning during undergraduate research, makes ethical and societal impacts of science clear by relating them to the students' own research projects, and develops students' ethical decision-making skills...
March 2017: PLoS Biology
https://www.readbyqxmd.com/read/28323804/transtibial-amputation-outcomes-study-taos-comparing-transtibial-amputation-with-and-without-a-tibiofibular-synostosis-ertl-procedure
#6
Michael J Bosse, Saam Morshed, Lisa Reider, William Ertl, James Toledano, Reeza Firoozabadi, Rachel B Seymour, Eben Carroll, Daniel O Scharfstein, Barbara Steverson, Ellen J MacKenzie
The optimal technique for a transtibial amputation in a young, active, and healthy patient is controversial. Proponents of the Ertl procedure (in which the cut ends of the tibia and fibula are joined with a bone bridge synostosis) argue that the residual limb is more stable which confers better prosthetic fit and improved function especially among high-performing individuals. At the same time, the Ertl procedure is associated with longer operative and healing time and may be associated with a higher complication rate compared with the standard Burgess procedure...
April 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28323699/use-of-nanocrystalline-hydroxyapatite-with-autologous-bma-and-local-bone-in-the-lumbar-spine-a-retrospective-ct-analysis-of-posterolateral-fusion-results
#7
Stephen Robbins, Carl Lauryssen, Matthew N Songer
STUDY DESIGN: A retrospective, multicenter, medical record review and independent analysis of computed tomographic scans was performed in 46 patients to determine radiographic arthrodesis rates after 1-segment, 2-segment, or 3-segment instrumented posterolateral fusions (PLF) using autograft, bone marrow aspirate (BMA), and a nanocrystalline hydroxyapatite bone void filler (nHA). OBJECTIVE: To determine the radiographic arthrodesis rates after instrumented lumbar PLF using local autograft, BMA, and nHA...
April 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28323617/cryoem-structures-of-membrane-pore-and-prepore-complex-reveal-cytolytic-mechanism-of-pneumolysin
#8
Katharina van Pee, Alexander Neuhaus, Edoardo D'Imprima, Deryck J Mills, Werner Kühlbrandt, Özkan Yildiz
Many pathogenic bacteria produce pore-forming toxins to attack and kill human cells. We have determined the 4.5 Å structure of the ~2.2 MDa pore complex of pneumolysin, the main virulence factor of Streptococcus pneumoniae, by cryoEM. The pneumolysin pore is a 400 Å ring of 42 membrane-inserted monomers. Domain D3 of the soluble toxin refolds into two ~85 Å β-hairpins that traverse the lipid bilayer and assemble into a 168-strand β-barrel. The pore complex is stabilized by salt bridges between β-hairpins of adjacent subunits and an internal α-barrel...
March 21, 2017: ELife
https://www.readbyqxmd.com/read/28323548/referral-to-treatment-for-hospitalized-medical-patients-with-an-alcohol-use-disorder-a-proof-of-concept-brief-intervention-study
#9
Lisa Berger, Jennifer Hernandez-Meier, John Hyatt, Michael Brondino
Substance misuse intervention in healthcare settings is becoming a US national priority, especially in the dissemination and implementation of Screening, Brief Intervention, and Referral to Treatment (SBIRT). Yet, the referral to treatment component of SBIRT is understudied. This proof-of-concept investigation tested an enhanced coordinated hospital-community two session brief intervention designed to facilitate the referral to treatment of hospitalized medical patients with an alcohol use disorder. Participants (N = 9) attended the second session of the brief intervention held in the community in most cases (56%), while one out of three (33%) received some level of post-brief intervention alcohol and/or other drug treatment...
March 21, 2017: Social Work in Health Care
https://www.readbyqxmd.com/read/28323432/electronic-structures-and-oh-induced-atmospheric-degradation-of-cf3nsf2-a-potential-green-dielectric-replacement-for-sf6
#10
Lin Cheng, Xiaojuan Yu, Kun Zhao, Hua Hou, Baoshan Wang
Electronic structures of Trifluoromethyl imionosulfur difluoride (CF3NSF2) and degradation mechanisms by hydroxyl radical have been investigated using density functional theory (M06-2X), the complete basis set quadratic CBS-Q, and the explicitly correlated coupled-cluster methods [CCSD(T)-F12]. The d-function augmented Correlation-consistent basis sets including triple- and quadruple- were employed for the sulfur-containing species. It was found that CF3NSF2 exists as two conformations connected by the internal rotation of CF3 around the central NS bond...
March 21, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28319832/comparative-life-cycle-cost-assessment-of-painted-and-hot-dip-galvanized-bridges
#11
B Rossi, S Marquart, G Rossi
The study addresses the life cycle cost assessment (LCCA) of steel bridges, focusing on the maintenance activities and the maintenance scenario. Firstly, the unit costs of maintenance activities and their durability (i.e. the time between two activities) are evaluated. Pragmatic data are provided for the environment category C4 and for three activities: Patch Up, Overcoating and Remove & Replace. A comparative LCCA for a typical hypothetic steel girder bridge is carried out, either painted or hot-dip galvanized (HDG), in the environmental class C4...
March 17, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28319470/symptomatic-acute-on-chronic-subdural-hematoma-a-clinicopathological-study
#12
Rudy J Castellani, Gruschenka Mojica-Sanchez, Gary Schwartzbauer, David S Hersh
The pathophysiology of acute-on-chronic subdural hematoma (ACSDH) is complex and incompletely understood. Evidence to date indicates that the overall process is initiated by rotational force with movement of the brain inside the skull, which exerts tensile strain and rupture of bridging veins, leading in turn to acute hemorrhage in the subdural potential space. This is followed by the proliferation of mesenchymal elements with angiogenesis and inflammation, which in turn becomes a substrate for repeated hemorrhage and expansion of the lesion...
March 18, 2017: American Journal of Forensic Medicine and Pathology
https://www.readbyqxmd.com/read/28319363/real-time-observation-of-the-electrode-size-dependent-evolution-dynamics-of-the-conducting-filaments-in-a-sio2-layer
#13
Fang Yuan, Zhi Zhang, Chunru Liu, Feichi Zhou, Hei Man Yau, Wei Lu, Xiaoyan Qiu, H-S Philip Wong, Jiyan Dai, Yang Chai
Conducting Bridge Random Access Memory (CBRAM) is one of the most promising candidates for future non-volatile memories. It is important to understand the scalability and retention of CBRAM cells to realize better memory performance. Here we directly observe the switching dynamics of Cu tip/SiO2/W cells with various active electrode sizes using in-situ transmission electron microscopy. Conducting filaments (CFs) grow from the active electrode (Cu tip) to inert electrode (W) during the SET operations. The size of the Cu tip affects the electric-field distribution, the amount of the cation injection into electrolyte, and the dimension of the CF...
March 20, 2017: ACS Nano
https://www.readbyqxmd.com/read/28319338/management-of-us-men-women-and-children-with-hemophilia-and-methods-and-demographics-of-the-bridging-hemophilia-b-experiences-results-and-opportunities-into-solutions-b-hero-s-study
#14
Tyler W Buckner, Michelle Witkop, Christine Guelcher, Mary Jane Frey, Susan Hunter, Skye Peltier, Michael Recht, Christopher Walsh, Craig M Kessler, Wendy Owens, David B Clark, Neil Frick, Michelle Rice, Neeraj N Iyer, Natalia Holot, David L Cooper, Robert Sidonio
The Bridging Hemophilia B Experiences, Results and Opportunities Into Solutions (B-HERO-S) initiative was launched in an effort to address specific gaps in the understanding of the psychosocial impact of mild-moderate-severe hemophilia B. The original Hemophilia Experiences, Results and Opportunities (HERO) qualitative study evaluated the needs of people with hemophilia A or B in multiple countries; however, a majority of participants had the more common moderate-severe hemophilia A. The B-HERO-S study was designed in collaboration with the hemophilia community to evaluate the needs of adults with hemophilia B and caregivers of children with hemophilia B, including affected women and caregivers of girls with hemophilia...
April 2017: European Journal of Haematology
https://www.readbyqxmd.com/read/28319337/impact-of-mild-to-severe-hemophilia-on-education-and-work-by-us-men-women-and-caregivers-of-children-with-hemophilia-b-the-bridging-hemophilia-b-experiences-results-and-opportunities-into-solutions-b-hero-s-study
#15
Susan Cutter, Don Molter, Spencer Dunn, Susan Hunter, Skye Peltier, Kimberly Haugstad, Neil Frick, Natalia Holot, David L Cooper
The psychosocial impact of hemophilia on work was recently investigated in the Hemophilia Experiences, Results and Opportunities (HERO) study. The findings revealed that hemophilia had an impact for adults with moderate/severe hemophilia and caregivers of children with hemophilia. HERO did not specifically evaluate impact on education in adults/children with mild/moderate hemophilia or the impact on employment of spouses/partners of caregivers of affected children. The Bridging Hemophilia B Experiences, Results and Opportunities into Solutions (B-HERO-S) study evaluated the impact of hemophilia on the lives of adult men/women with mild-severe hemophilia B and caregivers of boys/girls with hemophilia B and their spouses/partners...
April 2017: European Journal of Haematology
https://www.readbyqxmd.com/read/28319336/impact-of-mild-to-severe-hemophilia-on-engagement-in-recreational-activities-by-us-men-women-and-children-with-hemophilia-b-the-bridging-hemophilia-b-experiences-results-and-opportunities-into-solutions-b-hero-s-study
#16
Kimberly Baumann, Grace Hernandez, Michelle Witkop, Skye Peltier, Spencer Dunn, Susan Cutter, Neil Frick, Kimberly Haugstad, Christine Guelcher, Mary Jane Frey, Dawn Rotellini, David B Clark, Neeraj N Iyer, David L Cooper
The psychosocial impact of hemophilia on activities was recently investigated in the Hemophilia Experiences, Results and Opportunities (HERO) study (675 people with hemophilia and 561 caregivers of children with hemophilia in 10 countries). The impact of hemophilia B may not be accurately reflected in the HERO results, as ~75% of respondents described issues affecting males with hemophilia A. To address the needs of this population, the Bridging Hemophilia B Experiences, Results and Opportunities Into Solutions (B-HERO-S) was developed as a pilot study in the United States in collaboration with the hemophilia community...
April 2017: European Journal of Haematology
https://www.readbyqxmd.com/read/28319335/evaluating-the-psychosocial-impact-of-hemophilia-b-the-bridging-hemophilia-b-experiences-results-and-opportunities-into-solutions-b-hero-s-study
#17
Robert Sidonio, Natalia Holot, David L Cooper
The needs of individuals living with hemophilia B, especially those with mild or moderate hemophilia and affected females, are not well understood. The Bridging Hemophilia B Experiences, Results and Opportunities into Solutions (B-HERO-S) initiative was developed in an effort to obtain greater insights into the unique issues and challenges faced by those with hemophilia B. This study explored the impact of hemophilia B on education, employment, engagement in physical activities and other psychosocial aspects of the lives of affected individuals and their families...
April 2017: European Journal of Haematology
https://www.readbyqxmd.com/read/28319328/bridging-the-gap-training-and-education-in-the-pathology-and-cytopathology-sphere
#18
Diane Davis Davey
No abstract text is available yet for this article.
March 20, 2017: Cancer
https://www.readbyqxmd.com/read/28319304/chemoselective-alteration-of-fluorophore-scaffolds-as-a-strategy-for-the-development-of-ratiometric-chemodosimeters
#19
Xinqi Zhou, Lauren Lesiak, Rui Lai, Jon R Beck, Jia Zhao, Christian G Elowsky, Hui Li, Cliff I Stains
Ratiometric sensors generally couple binding events or chemical reactions at a distal site to changes in the fluorescence of a core fluorophore scaffold. However, such approaches are often hindered by spectral overlap of the product and reactant species. We provide a strategy to design ratiometric sensors that display dramatic spectral shifts by leveraging the chemoselective reactivity of novel functional groups inserted within fluorophore scaffolds. As a proof-of-principle, fluorophores containing a borinate (RF620 ) or silanediol (SiOH2R) functionality at the bridging position of the xanthene ring system are developed as endogenous H2 O2 sensors...
March 20, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28319240/two-paradigms-for-endovascular-thrombectomy-after-intravenous-thrombolysis-for-acute-ischemic-stroke
#20
Gaspard Gerschenfeld, Ioan-Paul Muresan, Raphael Blanc, Michael Obadia, Marie Abrivard, Michel Piotin, Sonia Alamowitch
Importance: Intravenous thrombolysis (IVT) followed by mechanical thrombectomy (MT) is recommended to treat acute ischemic stroke (AIS) with a large vessel occlusion (LVO). Most hospitals do not have on-site MT facilities, and most patients need to be transferred secondarily after IVT (drip and ship), which may have an effect on the neurologic outcome. Objective: To compare the functional independence at 3 months between patients treated under the drip-and-ship paradigm and those treated on site (mothership)...
March 20, 2017: JAMA Neurology
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