Read by QxMD icon Read


Anha Afrin Shefa, Mirana Taz, Monir Hossain, Yong Sik Kim, Sun Young Lee, Byong-Taek Lee
Lethal bleeding due to street accidents, natural calamities, orthopedic/dental surgeries, organ transplantation and household injuries, is the leading cause of morbidity and mortality. In the current study, zinc oxide (ZnO) was incorporated in TEMPO-oxidized cellulose nanofiber (TOCN) and polyethylene glycol (PEG) polymer system for hemorrhage control by freeze drying method. SEM and XRD data showed the presence of ZnO in the porous structure. FT-IR analysis showed that, successful conjugation occurs among the TOCN and PEG...
December 8, 2018: International Journal of Biological Macromolecules
Janis Sokolovskis, Dorien Herremans, Elaine Chew
Practice is an essential part of music training, but critical content-based analyses of practice behaviors still lack tools for conveying informative representation of practice sessions. To bridge this gap, we present a novel visualization system, the Music Practice Browser, for representing, identifying, and analysing music practice behaviors. The Music Practice Browser provides a graphical interface for reviewing recorded practice sessions, which allows musicians, teachers, and researchers to examine aspects and features of music practice behaviors...
2018: Frontiers in Psychology
(no author information available yet)
OBJECTIVE: Research indicates that among the many elements of resistance exercise protocols, training volume and total training load are the key factors for post-exercise increase in the secretion of testosterone (T), growth hormone (GH), insulin-like growth factor (IGF-1) and cortisol (C). The aim of this study was to determine the effects of resistance exercises with variable volume and constant intensity and movement tempo on post-exercise concentrations of selected anabolic and catabolic hormones...
October 10, 2018: Neuro Endocrinology Letters
Llyza Mendoza, Laila Hossain, Emma Downey, Camilla Scales, Warren Batchelor, Gil Garnier
HYPOTHESIS: Carboxylated nanocellulose fibres formed into foam structures can demonstrate superabsorption capacity. Their performance can be engineered by changing process variables. EXPERIMENTS: TEMPO-oxidised cellulose nanofibres of varying concentration and surface charge are produced from hardwood kraft pulp. Foams were prepared through a 2-step freezing and lyophilisation process. The absorption capacity of water and saline solution (0.9 wt%) were measured as a function of time and related to the foam structure...
December 1, 2018: Journal of Colloid and Interface Science
Jeska Buhmann, Bart Moens, Edith Van Dyck, Dobromir Dotov, Marc Leman
The use of music and specifically tempo-matched music has been shown to affect running performance. But can we maximize the synchronization of movements to music and does maximum synchronization influence kinematics and motivation? In this study, we explore the effect of different types of music-to-movement alignment strategies on phase coherence, cadence and motivation. These strategies were compared to a control condition where the music tempo was deliberately not aligned to the running cadence. Results show that without relative phase alignment, a negative mean asynchrony (NMA) of footfall timings with respect to the beats is obtained...
2018: PloS One
Hejun An, Shaoyu Mai, Qingqing Xuan, Yao Zhou, Qiuling Song
An expedient strategy for the synthesis of 5-oxazole ketones was developed via homogeneous gold catalysis with 4-MeO-TEMPO as an oxidant. The desired 5-oxazole ketones were achieved in decent yields with excellent functional group compatibility under mild conditions. The current protocol also represents the first example for merging gold catalyst and radical chemistry in one-pot synthesis with internal N-propargylamides.
December 5, 2018: Journal of Organic Chemistry
Alok Kumar Tripathi, Sushma Kundu, Ranjan Das
Charge-transfer (CT) electronic states are generally seen in molecules involving interactions between species of low ionization potential and high electron affinity. In this context, the 2,2,6,6-tetramethylpiperidine-N-oxyl (TEMPO) free radical is not considered to be a typical molecule to form charge transfer states with aromatic hydrocarbons. Nevertheless, involvement of such CT states has been invoked in rationalising the spin-dependent photophysical quenching of excited states of aromatic systems by TEMPO during bimolecular collisions...
December 5, 2018: Physical Chemistry Chemical Physics: PCCP
Sivoney Ferreira Souza, Marcos Mariano, Marcelo A De Farias, Juliana Silva Bernardes
Cellulose nanofibers (CNF) can present a high viscosity and thixotropic behavior when dispersed in water. In this work, CNF isolated from sugarcane bagasse and modified by N-oxyl-2,2,6,6-tetramethylpiperidine (TEMPO) oxidation was added to a solution of carboxymethyl cellulose (CMC). This process produced an unexpected viscosity due to a synergistic effect that was observed macroscopically through rheology analysis. The phenomenon known as depletion flocculation was observed, which was caused by the reduction of the excluded volume...
November 26, 2018: Journal of Colloid and Interface Science
Mathew Domeier, Valentina Magni, Mark W Hounslow, Trond H Torsvik
Decades of geochronological work have shown the temporal distribution of zircon ages to be episodic on billion-year timescales and seemingly coincident with the lifecycle of supercontinents, but the physical processes behind this episodicity remain contentious. The dominant, end-member models of fluctuating magmatic productivity versus selective preservation of zircon during times of continental assembly have important and very different implications for long-term, global-scale phenomena, including the history of crustal growth, the initiation and evolution of plate tectonics, and the tempo of mantle outgassing over billions of years...
November 30, 2018: Scientific Reports
James K Sullivan, James J Irrgang, Elena Losina, Clare Safran-Norton, Jamie Collins, Swastina Shrestha, Faith Selzer, Kim Bennell, Leslie Bisson, Angela T Chen, Courtney K Dawson, Alexandra B Gil, Morgan H Jones, Melissa A Kluczynski, Kathleen Lafferty, Jeffrey Lange, Emma C Lape, John Leddy, Aaron V Mares, Kurt Spindler, Jennifer Turczyk, Jeffrey N Katz
BACKGROUND: Meniscal tears often accompany knee osteoarthritis, a disabling condition affecting 14 million individuals in the United States. While several randomized controlled trials have compared physical therapy to surgery for individuals with knee pain, meniscal tear, and osteoarthritic changes (determined via radiographs or magnetic resonance imaging), no trial has evaluated the efficacy of physical therapy alone in these subjects. METHODS: The Treatment of Meniscal Tear in Osteoarthritis (TeMPO) Trial is a four-arm multi-center randomized controlled clinical trial designed to establish the comparative efficacy of two in-clinic physical therapy interventions (one focused on strengthening and one containing placebo) and two protocolized home exercise programs...
December 1, 2018: BMC Musculoskeletal Disorders
Marios Kidonakis, Anisa Mullaj, Manolis Stratakis
Aromatic aldehydes and acetophenones undergo silylative pinacol-type reductive dimerization in their reaction with silylborane pinB-SiMe2Ph (pin: pinacolato) catalyzed by supported Au nanoparticles on TiO2. It is proposed that after initial activation of silylborane by Au nanoparticles and addition to the carbonyl functionality of an aromatic aldehyde or ketone, an aryl silyloxy radical is generated from the collapse of the intermediate adduct, which then dimerizes through a chain process. The silyloxy radical was almost quantitatively trapped, in the presence of TEMPO...
November 30, 2018: Journal of Organic Chemistry
Samir Kumar Bhunia, Pritha Das, Ranjan Jana
Organoselenium and selenophosphorus compounds are ubiquitously found in biologically active compounds, agrochemicals, functionalized materials etc. Although selenium is a micronutrient and an essential trace element, its contamination/consumption in higher concentrations is extremely dangerous. However, most of the previous selenation reactions generate toxic selenium waste as a by-product. Thus development of green synthetic protocols of these compounds is in high demand. We report herein a mild base-catalyzed cross-dehydrogenative coupling (CDC) between electron-rich arenes and phenylselenol to afford 3-selenylindole or selenylated phenols under air at room temperature...
November 28, 2018: Organic & Biomolecular Chemistry
Ying Liu, Guangyuan Liu, Dongtao Wei, Qiang Li, Guangjie Yuan, Shifu Wu, Gaoyuan Wang, Xingcong Zhao
Tempo is an important musical element that affects human's emotional processes when listening to music. However, it remains unclear how tempo and training affect individuals' emotional experience of music. To explore the neural underpinnings of the effects of tempo on music-evoked emotion, music with fast, medium, and slow tempi were collected to compare differences in emotional responses using functional magnetic resonance imaging (fMRI) of neural activity between musicians and non-musicians. Behaviorally, musicians perceived higher valence in fast music than did non-musicians...
2018: Frontiers in Psychology
Moisés D Escalona S, Pedro Ivo Simões, Alejandro Gonzalez-Voyer, Santiago Castroviejo-Fisher
Anurans emit advertisement calls with the purpose of attracting mates and repelling conspecific competitors. The evolution of call traits is expected to be associated with the evolution of anatomical and behavioral traits due to the physics of call emission and transmission. Additionally, since vocalizing might imply a trade-off with investment in parental care, the evolution of calls is expected to trade-off with parental care. Here, we investigated the association between body size, calling site, parental care and call properties (call duration, number of notes, peak frequency, frequency bandwidth and call structure) of the advertisement calls of glassfrogs (Centrolenidae)-a family of Neotropical, leaf-dwelling anurans-using phylogenetic comparative methods...
November 27, 2018: Journal of Evolutionary Biology
Xiaoming Jie, Yaping Shang, Zhe-Ning Chen, Xiaofeng Zhang, Wei Zhuang, Weiping Su
Enamine and imine represent two of the most common reaction intermediates in syntheses, and the imine intermediates containing α-hydrogen often exhibit the similar reactivity to enamines due to their rapid tautomerization to enamine tautomers. Herein, we report that the minor structural difference between the enamine and the enamine tautomer derived from imine tautomerization results in the different chemo- and regioselectivity in the reaction of cyclohexanones, amines and TEMPO: the reaction of primary amines furnishes the formal oxygen 1,2-migration product, α-amino-enones, while the reaction of secondary amines under similar conditions generates exclusively arylamines via consecutive dehydrogenation on the cyclohexyl rings...
November 27, 2018: Nature Communications
Juan Sebastian Martin-Saavedra, Laura Daniela Vergara-Mendez, Iván Pradilla, Alberto Vélez-van-Meerbeke, Claudia Talero-Gutiérrez
PURPOSE: To evaluate if music characteristics like tempo, harmony, melody, instrumentation, volume, and pitch, as defined by musical theory, are described in randomized clinical trials (RCTs) evaluating the effects of music-listening on the quantified pain perception of adults, and if these characteristics influence music's overall therapeutic effect. METHODS: A systematic review and meta-analysis of RCTs evaluating music-listening for pain management on adults was performed according to the Preferred Reporting Items for Systematic Review and Meta-Analyses statement...
December 2018: Complementary Therapies in Medicine
Paulina Samczuk, Hady Razak Hady, Edyta Adamska-Patruno, Anna Citko, Jacek Dadan, Coral Barbas, Adam Kretowski, Michal Ciborowski
Different kinds of gastrointestinal tract modulations known as "bariatric surgery" are actually the most effective treatment for obesity and associated co-morbidities, such as type 2 diabetes (T2DM). The potential causes of those effects have yet to be explained. In our study, we focused on molecular changes evoked by laparoscopic sleeve gastrectomy leading to T2DM remission. Two complementary metabolomics techniques, namely, liquid chromatography coupled with mass spectrometry (LC-MS) and gas chromatography mass spectrometry (GC-MS), were used to study those effects in a group of 20 obese patients with T2DM selected from a cohort of 372 obese individuals who underwent bariatric surgery and did not receive anti-diabetic treatment afterward...
November 24, 2018: International Journal of Molecular Sciences
William A Freyman, Sebastian Höhna
A major goal of evolutionary biology is to identify key evolutionary transitions that correspond with shifts in speciation and extinction rates. Stochastic character mapping has become the primary method used to infer the timing, nature, and number of character state transitions along the branches of a phylogeny. The method is widely employed for standard substitution models of character evolution. However, current approaches cannot be used for models that specifically test the association of character state transitions with shifts in diversification rates such as state-dependent speciation and extinction (SSE) models...
November 26, 2018: Systematic Biology
Carl E Hjelmen, Margaret A Garrett, V Renee Holmes, Melissa Mynes, Elizabeth Piron, J Spencer Johnston
Genome sizes are known to vary between closely related species, but the patterns behind this variation have yet to be fully understood. While this variation has been evaluated between species and within sexes, unknown is the extent to which this variation is driven by differentiation in sex-chromosomes. In order to address this longstanding question, we examine the mode and tempo of genome size evolution for a total of 87 species of Drosophilidae, estimating and updating male genome size values for 44 of these species...
November 24, 2018: Journal of Heredity
Yang Feng, Takeo Suga, Hiroyuki Nishide, Yoshimichi Ohki, George Chen, Shengtao Li
Polar groups and the charge-transport capability play significant roles in the dielectric properties of organic polymers, and thus influence the electric energy density upon application as a capacitor material. Here, the dielectric properties and electric conductivity of a series of polymers containing 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) radicals are investigated. The neat radical polymer poly(TEMPO methacrylate) (PTMA) has a high dielectric constant but poor breakdown strength. Poly(methyl methacrylate) (PMMA) is introduced as an insulating polymer with high resistivity on breakdown, along with molecular design of PTMA...
November 26, 2018: Macromolecular Rapid Communications
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"