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https://www.readbyqxmd.com/read/28429740/micelle-template-synthesis-of-hollow-silica-spheres-for-improving-water-vapor-permeability-of-waterborne-polyurethane-membrane
#1
Yan Bao, Tong Wang, Qiaoling Kang, Chunhua Shi, Jianzhong Ma
Hollow silica spheres (HSS) with special interior spaces, high specific surface area and excellent adsorption and permeability performance were synthesized via micelle-template method using cetyl trimethyl ammonium bromide (CTAB) micelles as soft template and tetraethoxysilane (TEOS) as silica precursor. SEM, TEM, FT-IR, XRD, DLS and BET-BJH were carried out to characterize the morphology and structure of as-obtained samples. The results demonstrated that the samples were amorphous with a hollow structure and huge specific surface area...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28418041/highly-sensitive-strain-sensor-based-on-helical-structure-combined-with-mach-zehnder-interferometer-in-multicore-fiber
#2
Hailiang Zhang, Zhifang Wu, Perry Ping Shum, Xuan Quyen Dinh, Chun Wah Low, Zhilin Xu, Ruoxu Wang, Xuguang Shao, Songnian Fu, Weijun Tong, Ming Tang
Optical fiber sensors for strain measurement have been playing important roles in structural health monitoring for buildings, tunnels, pipelines, aircrafts, and so on. A highly sensitive strain sensor based on helical structures (HSs) assisted Mach-Zehnder interference in an all-solid heterogeneous multicore fiber (MCF) is proposed and experimentally demonstrated. Due to the HSs, a maximum strain sensitivity as high as -61.8 pm/με was experimentally achieved. This is the highest sensitivity among interferometer-based strain sensors reported so far, to the best of our knowledge...
April 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28417582/hierarchical-tio2-sno2-hollow-spheres-coated-with-graphitized-carbon-for-high-performance-electrochemical-li-ion-storage
#3
Huiqi Xie, Min Chen, Limin Wu
A self-templated strategy is developed to fabricate hierarchical TiO2 /SnO2 hollow spheres coated with graphitized carbon (HTSO/GC-HSs) by combined sol-gel processes with hydrothermal treatment and calcination. The as-prepared mesoporous HTSO/GC-HSs present an approximate yolk-double-shell structure, with high specific area and small nanocrystals of TiO2 and SnO2 , and thus exhibit superior electrochemical reactivity and stability when used as anode materials for Li-ion batteries. A high reversible specific capacity of about 310 mAh g(-1) at a high current density of 5 A g(-1) can be achieved over 500 cycles indicating very good cycle stability and rate performance...
April 18, 2017: Small
https://www.readbyqxmd.com/read/28409868/validated-uhplc-ms-ms-assay-for-quantitative-determination-of-etoposide-gemcitabine-vinorelbine-and-their-metabolites-in-lung-cancer-patients
#4
Xiaobin Gong, Le Yang, Feng Zhang, Youtian Liang, Shouhong Gao, Ke Liu, Wansheng Chen
A fully valid ultra-high performance liquid chromatography coupled with mass spectrometry (UHPLC- MS/MS) method was developed for the determination of etoposide, gemcitabine, vinorelbine and their metabolites (etoposide catechol, 2',2'-difluorodeoxyuridine and 4-O-deacetylvinorelbine) in human plasma. Multiple reaction monitoring (MRM) mode was performed with an electrospray ionization (ESI) interface operating in both the positive and negative ion modes per compound. The method required only 100 μL plasma with a one-step simple de-proteinization procedure, and a short run time of 7...
April 13, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/28403345/effects-of-hypertonic-saline-solution-associated-to-remote-ischemic-perconditioning-in-kidney-ischemia-reperfusion-injury-in-rats
#5
Marcus Vinicius Henriques Brito, Edson Yuzur Yasojima, Sandro Percário, Rubens Fernando Gonçalves Ribeiro, Lainy Carollyne da Costa Cavalcante, Andrew Moraes Monteiro, Rodrigo Paracampo Couteiro, Ivone Aline da Silva Rodrigues, Hellen Aparecida Geyer Dos Santos
Purpose: To evaluate the effects of hypertonic saline solution associated to remote ischemic perconditioning in renal ischemia/reperfusion injury in rats. Methods: Twenty five male rats (Wistar) underwent right nephrectomy and were distributed into five groups: Sham group (S); Ischemia/Reperfusion group (I/R) with 30 minutes of renal ischemia; Remote ischemic perconditioning group (Per) with three cycles of 10 minutes of I/R performed during kidney ischemia; Hypertonic saline solution group (HSS) treated with hypertonic saline solution (4ml/kg); remote ischemic perconditioning + Hypertonic saline solution group (Per+HSS) with both treatments...
March 2017: Acta Cirúrgica Brasileira
https://www.readbyqxmd.com/read/28399575/evaluation-of-the-prevalence-of-burnout-and-psychological-morbidity-among-radiation-oncologist-members-of-the-kyoto-radiation-oncology-study-group-krosg
#6
Wambaka Ange Mampuya, Yukinori Matsuo, Akira Nakamura, Masahiro Hiraoka
This study aimed to evaluate the self-reported prevalence of burnout and psychological morbidity among radiation oncologists members of the Kyoto Radiation Oncology Study Group (KROSG) and to identify factors contributing to burnout. We mailed an anonymous survey to 125 radiation oncologists members of the KROSG. The survey included; the demographic data, the Maslach Burnout Inventory - Human Services Survey (MBI-HSS) and the 12-item General Health Questionnaire (GHQ-12). There were 87 responses out of 125 eligible respondents (69...
March 1, 2017: Journal of Radiation Research
https://www.readbyqxmd.com/read/28369056/pulmonary-shunts-in-severe-hepatosplenic-schistosomiasis-diagnosis-by-contrast-echocardiography-and-their-relationship-with-abdominal-ultrasound-findings
#7
Liana Gonçalves-Macedo, Ana Lucia Coutinho Domingues, Edmundo Pessoa Lopes, Carlos Feitosa Luna, Vitor Gomes Mota, Mônica Moraes de Chaves Becker, Brivaldo Markman-Filho
BACKGROUND: Schistosomiasis is endemic to several parts of the world. Among the species that affect humans, Schistosoma mansoni is one of the most common causes of illness. In regions where schistosomiasis mansoni is endemic, reinfection is responsible for the emergence of hepatosplenic schistosomiasis (HSS) with portal hypertension in about 10% of infected individuals. Regardless of its etiology, portal hypertension may bring about the formation of arteriovenous fistulas and pulmonary vascular dilation, thus constituting a pulmonary shunt and its presence has been associated with the occurrence of neurological complications...
April 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28363013/probing-evolution-of-twist-angle-dependent-interlayer-excitons-in-mose2-wse2-van-der-waals-heterostructures
#8
Pramoda K Nayak, Yevhen Horbatenko, Seongjoon Ahn, Gwangwoo Kim, Jae-Ung Lee, Kyung Yeol Ma, A-Rang Jang, Hyunseob Lim, Dogyeong Kim, Sunmin Ryu, Hyeonsik Cheong, Noejung Park, Hyeon Suk Shin
Interlayer excitons were observed at the heterojunctions in van der Waals heterostructures (vdW HSs). However, it is not known how the excitonic phenomena are affected by the stacking order. Here, we report twist-angle-dependent interlayer excitons in MoSe2/WSe2 vdW HSs based on photoluminescence (PL) and vdW-corrected density functional theory calculations. The PL intensity of the interlayer excitons depends primarily on the twist angle: It is enhanced at coherently stacked angles of 0° and 60° (owing to strong interlayer coupling) but disappears at incoherent intermediate angles...
April 6, 2017: ACS Nano
https://www.readbyqxmd.com/read/28356443/a-microrna93-irf9-irg1-itaconic-acid-pathway-modulates-m2-like-macrophage-polarization-to-revascularize-ischemic-muscle
#9
Vijay Chaitanya Ganta, Min Hyub Choi, Anna Kutateladze, Todd E Fox, Charles R Farber, Brian H Annex
Background -Currently no therapies exist for treating, and improving outcomes in patients with severe peripheral arterial disease (PAD). MicroRNA93 (miR93) has been shown to favorably modulate angiogenesis and reduce tissue loss in genetic PAD models. However, the cell specific function, downstream mechanisms or signaling involved in miR93 mediated ischemic muscle neovascularization is not clear. Macrophages were best known to modulate arteriogenic response in PAD and the extent of arteriogenic response induced by macrophages is dependent on greater M2 to M1-activation/polarization state...
March 29, 2017: Circulation
https://www.readbyqxmd.com/read/28350397/diagnosis-and-body-mass-index-effects-on-hippocampal-volumes-and-neurochemistry-in-bipolar-disorder
#10
D J Bond, L E Silveira, E L MacMillan, I J Torres, D J Lang, W Su, W G Honer, R W Lam, L N Yatham
We previously reported that higher body mass index (BMI) was associated with greater hippocampal glutamate+glutamine in people with bipolar disorder (BD), but not in non-BD healthy comparator subjects (HSs). In the current report, we extend these findings by examining the impact of BD diagnosis and BMI on hippocampal volumes and the concentrations of several additional neurochemicals in 57 early-stage BD patients and 31 HSs. Using 3-T magnetic resonance imaging and magnetic resonance spectroscopy, we measured bilateral hippocampal volumes and the hippocampal concentrations of four neurochemicals relevant to BD: N-acetylaspartate+N-acteylaspartylglutamate (tNAA), creatine+phosphocreatine (Cre), myoinositol (Ins) and glycerophosphocholine+phosphatidylcholine (Cho)...
March 28, 2017: Translational Psychiatry
https://www.readbyqxmd.com/read/28327599/metal-organic-framework-templated-synthesis-of-ultrasmall-catalyst-loaded-zno-znco2o4-hollow-spheres-for-enhanced-gas-sensing-properties
#11
Won-Tae Koo, Seon-Jin Choi, Ji-Soo Jang, Il-Doo Kim
To achieve the rational design of nanostructures for superior gas sensors, the ultrasmall nanoparticles (NPs) loaded on ternary metal oxide (TMO) hollow spheres (HS) were synthesized by using the polystyrene (PS) sphere template and bimetallic metal-organic framework (BM-MOFs) mold. The zinc and cobalt based zeolite imidazole frameworks (BM-ZIFs) encapsulating ultrasmall Pd NPs (2-3 nm) were assembled on PS spheres at room temperature. After calcination at 450 °C, these nanoscale Pd particles were effectively infiltrated on the surface of ZnO/ZnCo2O4 HSs...
March 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28317265/simultaneous-determination-of-eight-alkaloids-and-oleandrin-in-herbal-cosmetics-by-dispersive-solid-phase-extraction-coupled-with-ultra-high-performance-liquid-chromatography-and-tandem-mass-spectrometry
#12
Zhiqing Xun, Donghong Liu, Rongrong Huang, Shuang He, Du Hu, Xindong Guo, Yanping Xian
We utilized ultra high performance liquid chromatography with tandem mass spectrometry and dispersive solid-phase extraction to develop a new method for the detection of nine analytes (scopolamine, cephaeline, strychnine, hyoscyamine, brucine, hydrastine, ajmalicine, colchicine and oleandrin) in herbal cosmetics. Acetonitrile/water and 2-propylaminoethylamine were used to disperse and purify during the dispersive solid-phase extraction step. The analytes were separated by a Waters UPLC HSS T3 column and detected through electrospray ionization source in the positive mode with multi-reaction monitoring conditions...
March 20, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28317213/dual-role-as-a-protective-factor-for-burnout-related-depersonalization-in-oncologists
#13
Yi He, Ying Pang, Yening Zhang, Richard Fielding, Lili Tang
PURPOSE: This study compared self-reported burnout between dual-role oncologists (oncologists who also do psychosocial work) and single-role oncologists, to explore if dual role is protective against or a risk factor for burnout. METHODS: Dual-role oncologists from across China (n = 131) were consecutively recruited via the Chinese Psychosocial Oncology Society (CPOS) and asked to identify single-role oncologist peers (n = 168) working in the same institution...
March 20, 2017: Psycho-oncology
https://www.readbyqxmd.com/read/28302432/the-influence-of-spatial-configuration-on-the-frequency-of-use-of-hand-sanitizing-stations-in-health-care-environments
#14
Jun Rong Jeffrey Neo, Rana Sagha-Zadeh
BACKGROUND: The lack of user-friendly, accessible, and visible hand sanitizing stations (HSSs) in health care environments are significant factors affecting low hand hygiene compliance rates among caregivers. OBJECTIVE: To determine whether the simulated parameters of visibility and global traffic flow score for an HSS can influence the frequency of use of that HSS. METHODS: Space syntax was used to measure virtual simulation of spatial layouts of 3 units to provide quantitative visibility and global traffic flow scores for each HSS...
March 13, 2017: American Journal of Infection Control
https://www.readbyqxmd.com/read/28302132/long-term-results-and-comparison-of-the-three-different-high-tibial-osteotomy-and-fixation-techniques-in-medial-compartment-arthrosis
#15
Gökhan Polat, Halil İbrahim Balcı, Mehmet Fevzi Çakmak, Mehmet Demirel, Cengiz Şen, Mehmet Aşık
BACKGROUND: The purpose of this study is to report and analyze the long-term outcomes of the patients who underwent high tibial osteotomy (HTO) with three different techniques for the treatment of medial compartment arthrosis. METHODS: A total of 187 patients (195 knees) who underwent HTO between 1990 and 2010 were retrospectively evaluated. Eighty-eight knees, opening-wedge osteotomy with Puddu plate (group A); 51 knees, transverse osteotomy below the tubercle with external fixator (group B); and 29 knees, closing-wedge osteotomy with staple fixation (group C) were included in the study...
March 16, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/28292561/dried-blood-spots-combined-to-an-uplc-ms-ms-method-for-the-simultaneous-determination-of-drugs-of-abuse-in-forensic-toxicology
#16
Susana Sadler Simões, Antonio Castañera Ajenjo, Mário João Dias
A method for the simultaneous determination of 11 illicit drugs, using the dried blood spot (DBS) sampling technique combined with the UPLC-MS/MS technology was developed to study its applicability within the forensic toxicology. The DBS samples, prepared from a blood volume of 50μL and using the Whatman® BFC 180 bloodstain cards, were extracted with a methanol/acetonitrile mixture. The chromatographic separation was performed using an Acquity UPLC(®) HSS T3 column (100mm×2.1mm, 1.8μm) and an acetonitrile/2mM ammonium formate (0...
February 27, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28288072/dissecting-leapfrog-how-well-do-leapfrog-safe-practices-scores-correlate-with-hospital-compare-ratings-and-penalties-and-how-much-do-they-matter
#17
Shawna N Smith, Heidi A Reichert, Jessica M Ameling, Jennifer Meddings
BACKGROUND: Voluntary Leapfrog Safe Practices Score (SPS) measures were among the first public reports of hospital performance. Recently, Medicare's Hospital Compare website has reported compulsory measures. Leapfrog's Hospital Safety Score (HSS) grades incorporate SPS and Medicare measures. We evaluate associations between Leapfrog SPS and Medicare measures, and the impact of SPS on HSS grades. METHODS: Using 2013 hospital data, we linked Leapfrog HSS data with central line-associated bloodstream infection (CLABSI) and catheter-associated urinary tract infection (CAUTI) standardized infection ratios (SIRs), and Hospital Readmission and Hospital-Acquired Condition (HAC) Reduction Program penalties incorporating 2013 performance...
March 10, 2017: Medical Care
https://www.readbyqxmd.com/read/28275146/second-site-of-pyrrolizidine-alkaloid-biosynthesis-in-comfrey-boosts-plant-defense-in-floral-stage
#18
Lars H Kruse, Thomas Stegemann, Christian Sievert, Dietrich Ober
Pyrrolizidine alkaloids (PAs) are toxic secondary metabolites that are found in several, distantly related families of the angiosperms. The first specific step in PA biosynthesis is catalyzed by homospermidine synthase (HSS), which has been recruited several times independently by duplication of the gene encoding deoxyhypusine synthase (DHS), an enzyme involved in the post-translational activation of the eukaryotic initiation factor 5A. HSS shows highly diverse spatiotemporal gene expression in various PA-producing species...
March 8, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28269676/heart-sound-segmentation-using-fractal-decomposition
#19
Rijil Thomas, Ling Lieng Hsi, Soh Cheong Boon, Erry Gunawan
In order to assist cardiac diagnosis by phonocardiography, the automated identification of fundamental heart sounds for heart beat segmentation in a cardiac cycle plays a significant role in signal processing. Recent advancements in signal processing have also shown the potential of multifractality in biomedical applications. Hence, in this paper, the multifractal property of heart sounds is utilized to identify first and second heart sounds. The root mean square (rms) fluctuation used to obtain multifractal/singularity spectrum is used to decompose the heart sound into its own fractally-important components in time domain along with simultaneous Gaussianity test to filter out fundamental components...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28260913/music-therapy-induced-changes-in-salivary-cortisol-level-are-predictive-of-cardiovascular-mortality-in-patients-under-maintenance-hemodialysis
#20
Yi-Chou Hou, Yen-Ju Lin, Kuo-Cheng Lu, Han-Sun Chiang, Chia-Chi Chang, Li-King Yang
BACKGROUND: Music therapy has been applied in hemodialysis (HD) patients for relieving mental stress. Whether the stress-relieving effect by music therapy is predictive of clinical outcome in HD patients is still unclear. METHODS: We recruited a convenience sample of 99 patients on maintenance HD and randomly assigned them to the experimental (n=49) or control (n=50) group. The experimental group received relaxing music therapy for 1 week, whereas the control group received no music therapy...
2017: Therapeutics and Clinical Risk Management
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