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Danielle M Zerr, Scott J Weissman, Chuan Zhou, Matthew P Kronman, Amanda L Adler, Jessica E Berry, Jaipreet Rayar, Jeff Myers, Wren L Haaland, Carey-Ann D Burnham, Alexis Elward, Jason Newland, Rangaraj Selvarangan, Kaede V Sullivan, Theoklis Zaoutis, Xuan Qin
Objective.: In this report, we aim to describe the epidemiology of extended-spectrum cephalosporin-resistant (ESC-R) and carbapenem-resistant (CR) Enterobacteriaceae infections in children. Methods.: ESC-R and CR Enterobacteriaceae isolates from normally sterile sites of patients aged <22 years from 4 freestanding pediatric medical centers were collected along with the associated clinical data. Results.: The overall frequencies of ESC-R and CR isolates according to hospital over the 4-year study period ranged from 0...
January 19, 2017: Journal of the Pediatric Infectious Diseases Society
Zachary I Willis, Jessica Gillon, Meng Xu, James C Slaughter, M Cecilia Di Pentima
Introduction: Antimicrobial use is decreasing across freestanding children's hospitals, predominantly in institutions with antimicrobial stewardship programs (ASPs) in place. A highly effective ASP should effect a greater decrease in use than predicted by existing trends. Antimicrobial stewardship programs depend on clinician adherence to program recommendations, but little is known about factors associated with adherence. Methods: Parenteral antimicrobial-use data for our institution and 43 additional freestanding children's hospitals were obtained and normalized for patient census...
October 7, 2016: Journal of the Pediatric Infectious Diseases Society
Won-Yeop Rho, Myeung-Hwan Chun, Ho-Sub Kim, Hyung-Mo Kim, Jung Sang Suh, Bong-Hyun Jun
Dye-sensitized solar cells (DSSCs) were fabricated using open-ended freestanding TiO₂ nanotube arrays functionalized with Ag nanoparticles (NPs) in the channel to create a plasmonic effect, and then coated with large TiO₂ NPs to create a scattering effect in order to improve energy conversion efficiency. Compared to closed-ended freestanding TiO₂ nanotube array-based DSSCs without Ag or large TiO₂ NPs, the energy conversion efficiency of closed-ended DSSCs improved by 9.21% (actual efficiency, from 5...
June 15, 2016: Nanomaterials
Sara L Toomey, Marc N Elliott, Alan M Zaslavsky, David J Klein, Sifon Ndon, Shannon Hardy, Melody Wu, Mark A Schuster
BACKGROUND: Making national comparisons of family experience of inpatient pediatric care has been limited by the lack of a publicly available survey. The Agency for Healthcare Research and Quality and Centers for Medicare & Medicaid Services commissioned development of the Child Hospital Consumer Assessment of Healthcare Providers and Systems Survey to address this gap. Using Child Hospital Consumer Assessment of Healthcare Providers and Systems Survey, we measured performance of hospitals in a national field test...
March 22, 2017: Pediatrics
Shuwen Luo, Minjie Yao, Song Lei, Pengze Yan, Xiang Wei, Xiaotong Wang, Lili Liu, Zhiqiang Niu
Freestanding reduced graphene oxide-sulfur (rGO-S) composite films were fabricated by combining solution infiltration of sulfur into solvated rGO films with freeze-drying. Such rGO-S composite films can directly serve as the cathodes of lithium-sulfur (Li-S) batteries. The nanostructured architecture of rGO-S composite films considerably improved the cycling stability of Li-S batteries.
March 22, 2017: Nanoscale
Jennifer Hollowell, Yangmei Li, Kathryn Bunch, Peter Brocklehurst
BACKGROUND: For low risk women, there is good evidence that planned birth in a midwifery unit is associated with a reduced risk of maternal interventions compared with planned birth in an obstetric unit. Findings from the Birthplace cohort study have been interpreted by some as suggesting a reduced risk of interventions in planned births in freestanding midwifery units (FMUs) compared with planned births in alongside midwifery units (AMUs). However, possible differences have not been robustly investigated using individual-level Birthplace data...
March 21, 2017: BMC Pregnancy and Childbirth
Zachary P DeGregorio, Youngdong Yoo, James E Johns
Controlling the growth of two-dimensional (2D) transition metal dichalcogenides (TMDCs) is an important step toward utilizing these materials for either electronics or catalysis. Here, we report a new surface-templated growth method that enables the fabrication of MoO2/MoS2 and MoO2/MoTe2 core/shell nanoplates epitaxially aligned on (0001)-oriented 4H-silicon carbide and sapphire substrates. These heterostructures are characterized by a variety of techniques to identify the chemical and structural nature of the interface...
March 24, 2017: Journal of Physical Chemistry Letters
Monna Rozana, Nurul Izza Soaid, Tan Wai Kian, Go Kawamura, Atsunori Matsuda, Zainovia Lockman
ZrO2 nanotubes (ZrNTs) were produced by anodisation of zirconium foil in H2O2/NH4F/ethylene glycol electrolyte. The as-anodised foils were then soaked in the anodising electrolyte for 12 h. Soaking weakens the adherence of the anodic layer from the substrate resulting in freestanding ZrNTs (FS-ZrNTs). Moreover, the presence of H2O2 in the electrolyte also aids in weakening the adhesion of the film from the foil, as foil anodised in electrolyte without H2O2 has good film adherence. The as-anodised FS-ZrNTs film was amorphous and crystallised to predominantly tetragonal phase upon annealing at >300 °C...
April 18, 2017: Nanotechnology
Jennifer L Goldman, Rachael K Ross, Brian R Lee, Jason G Newland, Adam L Hersh, Matthew P Kronman, Jeffrey S Gerber
We analyzed antifungal and antiviral prescribing among high-risk children across freestanding children's hospitals. Antifungal and antiviral days of therapy varied across hospitals. Benchmarking antifungal and antiviral use and developing antimicrobial stewardship strategies to optimize use of these high cost agents is needed. Infect Control Hosp Epidemiol 2017;1-4.
March 15, 2017: Infection Control and Hospital Epidemiology
Amir Haji-Akbari, Pablo G Debenedetti
Water freezes in a wide variety of low-temperature environments, from meteors and atmospheric clouds to soil and biological cells. In nature, ice usually nucleates at or near interfaces, because homogenous nucleation in the bulk can only be observed at deep supercoolings. Although the effect of proximal surfaces on freezing has been extensively studied, major gaps in understanding remain regarding freezing near vapor-liquid interfaces, with earlier experimental studies being mostly inconclusive. The question of how a vapor-liquid interface affects freezing in its vicinity is therefore still a major open question in ice physics...
March 14, 2017: Proceedings of the National Academy of Sciences of the United States of America
Jamie Golden, Wesley E Barry, Gene Jang, Nam Nguyen, David Bliss
INTRODUCTION: The Morgagni hernia (MH) accounts for 3-4% of congenital diaphragmatic hernias. There is a paucity of data regarding this rare defect. The purpose of this study is to describe the characteristics of children with MH, surgical approaches for repair, and patient outcomes. METHODS: Pediatric patients (ages 0-18) with a MH from 2002 to 2014 at a single, freestanding pediatric hospital were retrospectively reviewed. Patient presentation, demographics, operative methods and findings, and outcomes were evaluated...
March 13, 2017: Pediatric Surgery International
Sibani Das, Amanda L Adler, Arianna Miles-Jay, Matthew P Kronman, Xuan Qin, Scott J Weissman, C A Burnham, Alexis Elward, Jason G Newland, Rangaraj Selvarangan, Kaede V Sullivan, Theoklis Zaoutis, Danielle M Zerr
The objective of this study was to assess the association between previous antibiotic use, particularly long-term prophylaxis, and occurrence of subsequent resistant infections in children with index infections due to extended-spectrum cephalosporin-resistant Enterobacteriaceae We also investigated the concordance of index and subsequent isolates. Extended-spectrum cephalosporin-resistant E. coli and Klebsiella spp. isolated from normally sterile sites of patients aged <22 years were collected along with associated clinical data from four freestanding pediatric centers...
March 13, 2017: Antimicrobial Agents and Chemotherapy
Linlin Ke, Jing Dong, Bo Lin, Tiantian Yu, Huifeng Wang, Sen Zhang, Chao Deng
The development of aqueous rechargeable sodium batteries (ARSBs) demands high-performance electrode materials, especially anode materials with low operating potential and competent electrochemical properties. The lithium/sodium vanadium phosphate family with good structural stability and abundant vanadium chemistry versatility is a promising series for energy storage applications. Herein, a new member in the sodium vanadium phosphate family, i.e. NaV3(PO4)3, is introduced as a novel anode candidate for ARSBs...
March 13, 2017: Nanoscale
Chuanxu Ma, Zhongcan Xiao, Honghai Zhang, Liangbo Liang, Jingsong Huang, Wenchang Lu, Bobby G Sumpter, Kunlun Hong, J Bernholc, An-Ping Li
In the bottom-up synthesis of graphene nanoribbons (GNRs) from self-assembled linear polymer intermediates, surface-assisted cyclodehydrogenations usually take place on catalytic metal surfaces. Here we demonstrate the formation of GNRs from quasi-freestanding polymers assisted by hole injections from a scanning tunnelling microscope (STM) tip. While catalytic cyclodehydrogenations typically occur in a domino-like conversion process during the thermal annealing, the hole-injection-assisted reactions happen at selective molecular sites controlled by the STM tip...
March 13, 2017: Nature Communications
Zhengrong Guo, Tienchong Chang, Xingming Guo, Huajian Gao
The adhesion of two-dimensional (2D) materials onto other surfaces is usually considered a solid-solid mechanical contact. Here, we conduct both atomistic simulations and theoretical modeling to show that there in fact exists an energy conversion between heat and mechanical work in the attachment/detachment of two-dimensional materials on/off solid surfaces, indicating two-dimensional materials adhesion is a gas-like adsorption rather than a pure solid-solid mechanical adhesion. We reveal that the underlying mechanism of this intriguing gas-like adhesion is the configurational entropy difference between the freestanding and adhered states of the two-dimensional materials...
December 2017: Scientific Reports
Lori A Gurien, Robert T Maxson, Melvin S Dassinger, Steven C Mehl, Marie E Saylors, Samuel D Smith
BACKGROUND: There is no required competency for pediatric vascular injury in surgical training. We sought to describe changes over time for surgical specialists operating on pediatric vascular trauma injuries at a pediatric trauma center. METHODS: Charts were retrospectively reviewed for vascular trauma injuries at a freestanding children's hospital between 1993 and 2015. Data were collected on mechanism, injured vessel(s), operation(s) performed, and specialists performing operation...
September 30, 2016: American Journal of Surgery
A L Herrera, K E Pasch
OBJECTIVES: Although some research has focused on the food environment and food marketing, little has examined outdoor food and beverage (FB) advertising, particularly its relationship to the Hispanic composition in schools. Therefore, the purpose of this study was to determine if the prevalence of outdoor FB advertising was greater around middle and high schools with a majority Hispanic population as compared to schools with a lower Hispanic population. DESIGN: All FB advertisements located within a half-mile of 47 schools in Central Texas were documented...
February 9, 2017: Ethnicity & Health
Ethan Self, Michael Naguib, Rose Ruther, Emily McRen, Ryszard Wycisk, Gao Liu, Jagjit Nanda, Peter Nicholas Pintauro
Freestanding nanofiber mat Li-ion battery anodes containing Si nanoparticles, carbon black, and poly(acrylic acid) (Si/C/PAA) are prepared using electrospinning. The mats are compacted to a high fiber volume fraction (~0.85), and interfiber contacts are welded by exposing the mat to methanol vapor. A compacted/welded fiber mat anode containing 40 wt% Si exhibits high capacities of 1,484 mAh g-1 (3,500 mAh gSi-1) at 0.1C and 489 mAh g-1 at 1C and good cycling stability (e.g., 73% capacity retention over 50 cycles)...
March 9, 2017: ChemSusChem
Jingda Wu, Lih Y Lin
Conventional approaches to flexible optoelectronic devices typically require depositing the active materials on external substrates. This is mostly due to the weak bonding between individual molecules or nanocrystals in the active materials, which prevents sustaining a freestanding thin film. Herein we demonstrate an ultrathin freestanding ZnO quantum dot (QD) active layer with nanocellulose structuring, and its corresponding device fabrication method to achieve substrate-free flexible optoelectronic devices...
March 7, 2017: Scientific Reports
Baozeng Zhou, Shengjie Dong, Xiaocha Wang, Kailiang Zhang, Wenbo Mi
Graphene-like two-dimensional materials have garnered tremendous interest as emerging device materials due to their remarkable properties. However, their applications in spintronics have been limited by the lack of intrinsic magnetism. Here, we perform an ab initio simulation on the structural and electronic properties of several transition-metal (TM) monolayers (TM = Cr, Mo and W) with a honeycomb lattice on a 1/3 monolayer Cl-covered Si(111) surface. Due to the template effect from the halogenated Si substrate, the TM-layers will be maintained in an expanded lattice which is nearly 60% larger than that of the freestanding case...
March 7, 2017: Physical Chemistry Chemical Physics: PCCP
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