keyword
MENU ▼
Read by QxMD icon Read
search

Directional preference

keyword
https://www.readbyqxmd.com/read/28548860/direct-imaging-of-kinetic-pathways-of-atomic-diffusion-in-monolayer-molybdenum-disulfide
#1
Jinhua Hong, Yuhao Pan, Zhixin Hu, Danhui Lv, Chuanhong Jin, Wei Ji, Jun Yuan, Ze Zhang
Direct observation of atomic migration both on and below surfaces is a long-standing but important challenge in materials science as diffusion is one of the most elementary processes essential to many vital material behaviors. Probing the kinetic pathways, including metastable or even transition states involved down to atomic scale, holds the key to the underlying physical mechanisms. Here, we applied aberration-corrected transmission electron microscopy (TEM) to demon-strate direct atomic-scale imaging and quasi-real-time tracking of diffusion of Mo adatoms and vacancies in monolayer MoS2, an important 2D transition metal dichalcogenide (TMD) system...
May 26, 2017: Nano Letters
https://www.readbyqxmd.com/read/28547995/adsorption-induced-deformation-of-hierarchically-structured-mesoporous-silica-effect-of-pore-level-anisotropy
#2
Christian Balzer, Anna M Waag, Stefan Gehret, Gudrun Reichenauer, Florian Putz, Nicola Hüsing, Oskar Paris, Noam Bernstein, Gennady Y Gor, Alexander V Neimark
The goal of this work is to understand adsorption-induced deformation of hierarchically structured porous silica exhibiting well-defined cylindrical mesopores. For this purpose, we performed an in situ dilatometry measurement on a calcined and sintered monolithic silica sample during the adsorption of N2 at 77 K. To analyze the experimental data, we extended the adsorption stress model to account for the anisotropy of cylindrical mesopores, i.e., we explicitly derived the adsorption stress tensor components in the axial and radial direction of the pore...
May 26, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28546828/improving-the-thermostability-of-a-fungal-gh11-xylanase-via-site-directed-mutagenesis-guided-by-sequence-and-structural-analysis
#3
Nanyu Han, Huabiao Miao, Junmei Ding, Junjun Li, Yuelin Mu, Junpei Zhou, Zunxi Huang
BACKGROUND: Xylanases have been widely employed in many industrial processes, and thermophilic xylanases are in great demand for meeting the high-temperature requirements of biotechnological treatments. In this work, we aim to improve the thermostability of XynCDBFV, a glycoside hydrolase (GH) family 11 xylanase from the ruminal fungus Neocallimastix patriciarum, by site-directed mutagenesis. We report favorable mutations at the C-terminus from B-factor comparison and multiple sequence alignment...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28546650/samango-monkeys-cercopithecus-albogularis-labiatus-manage-risk-in-a-highly-seasonal-human-modified-landscape-in-amathole-mountains-south-africa
#4
Katarzyna Nowak, Kirsten Wimberger, Shane A Richards, Russell A Hill, Aliza le Roux
Wild species use habitats that vary in risk across space and time. This risk can derive from natural predators and also from direct and indirect human pressures. A starving forager will often take risks that a less hungry forager would not. At a highly seasonal and human-modified site, we predicted that arboreal samango monkeys (Cercopithecus albogularis labiatus) would show highly flexible, responsive, risk-sensitive foraging. We first determined how monkeys use horizontal and vertical space across seasons to evaluate if high-risk decisions (use of gardens and ground) changed with season, a proxy for starvation risk...
2017: International Journal of Primatology
https://www.readbyqxmd.com/read/28545760/identification-of-synaptic-pattern-of-nmda-receptor-subunits-upon-direction-selective-retinal-ganglion-cells-in-developing-and-adult-mouse-retina
#5
Jun-Seok Lee, Hang-Gu Kim, Chang-Jin Jeon
Direction selectivity of the retina is a unique mechanism and critical function of eyes for surviving. Direction-selective retinal ganglion cells (DS RGCs) strongly respond to preferred directional stimuli, but rarely respond to the opposite or null directional stimuli. These DS RGCs are sensitive to glutamate, which is secreted from bipolar cells. Using immunocytochemistry, we studied with the distributions of N-methyl-d-aspartate (NMDA) receptor subunits on the dendrites of DS RGCs in the developing and adult mouse retina...
May 22, 2017: Acta Histochemica
https://www.readbyqxmd.com/read/28545538/providing-online-weight-management-in-primary-care-a-mixed-methods-process-evaluation-of-healthcare-practitioners-experiences-of-using-and-supporting-patients-using-power
#6
Emily Smith, Katherine Bradbury, Lisa Scott, Mary Steele, Paul Little, Lucy Yardley
BACKGROUND: An online weight management intervention (POWeR+) combined with a small amount of primary care healthcare practitioner support is effective in helping patients to lose weight, but little is known about how practitioners interact with the POWeR+ intervention or their experiences of providing support for patients using POWeR+. The aim of this study was to explore practitioners' usage of POWeR+ and their experiences of providing support to patients using POWeR+. METHODS: Set within a randomised controlled trial of POWeR+, practitioners' usage of POWeR+ was automatically captured and a qualitative process analysis was conducted employing semi-structured telephone interviews with practitioners who provided support to patients using POWeR+...
May 25, 2017: Implementation Science: IS
https://www.readbyqxmd.com/read/28545445/identification-of-enterococcus-faecalis-enzymes-with-azoreductases-and-or-nitroreductase-activity
#7
Valérie Chalansonnet, Claire Mercier, Sylvain Orenga, Christophe Gilbert
BACKGROUND: Nitroreductases, NAD(P)H dependent flavoenzymes, are found in most of bacterial species. Even if Enterococcus faecalis strains seems to present such activity because of their sensitivity to nitrofurans, no enzyme has been described. Nitroreductases were separated of others reductases due to their capacity to reduce nitro compounds. They are further classified based on their preference in cofactor: NADH and/or NADPH. However, recently, azoreductases have been studied for their strong activity on nitro compounds, especially nitro pro-drugs...
May 25, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28544993/muscarinic-receptor-m4-positive-allosteric-modulators-attenuate-central-effects-of-cocaine
#8
Camilla Dall, Pia Weikop, Ditte Dencker, Anna C Molander, Gitta Wörtwein, P Jeffrey Conn, Anders Fink-Jensen, Morgane Thomsen
BACKGROUND: Cocaine addiction is a chronic brain disease affecting neurotransmission. Muscarinic cholinergic receptors modulate dopaminergic signaling in the reward system, and muscarinic receptor stimulation can block direct reinforcing effects of cocaine. Here, we tested the hypothesis that specific muscarinic M4 receptor stimulation can attenuate the discriminative stimulus effects and conditioned rewarding effects of cocaine, measures believed to predict the ability of cocaine and cocaine-associated cues to elicit relapse to drug taking...
May 16, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28544940/directional-preference-of-activation-of-abdominal-and-paraspinal-muscles-during-position-control-tasks-in-sitting
#9
Martin Eriksson Crommert, Kylie Tucker, Christopher Holford, Alexander Wight, Donna McCook, Paul Hodges
Controversy exists in the literature regarding antagonist activity of trunk muscles during different types of trunk loading, and the direction-specificity of activation of trunk muscles, particularly the deeper trunk muscles. This study aimed to systematically compare activation of a range of trunk muscles between directions of statically applied loads, and to consider the impact of breathing in this activation. In a semi-seated position, 13 healthy male participants resisted moderate inertial loads applied to the trunk in eight different directions...
May 17, 2017: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/28544420/gold-i-hydrides-as-proton-acceptors-in-dihydrogen-bond-formation
#10
Ignacy Cukrowski, Jurgens Hendrik de Lange, Ferdinand Groenewald, Helgard G Raubenheimer
Wavefunction and DFT calculations indicate that anionic dihydride complexes of AuI form strong to moderate directed Au-H···H bonds with one or two HF, H₂O and NH₃ prototype proton donor molecules. The largely electrostatic interaction is influenced by relativistic effects which, however, do not increase the binding energy. Very weak Au···H associations - exhibiting a corresponding bond path - occur between neutral AuH and HF units, although ultimately F becomes the preferred donor atom in the most stable structure...
May 25, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/28543813/inhaled-pulmonary-vasodilator-therapy-for-management-of-right-ventricular-dysfunction-after-left-ventricular-assist-device-placement-and-cardiac-transplantation
#11
Leah A Sabato, David M Salerno, Jeremy D Moretz, Douglas L Jennings
Right ventricular failure (RVF) after cardiac transplant (CTX) or implantation of a continuous-flow left ventricular assist device (CF-LVAD) is associated with significant post-operative morbidity and mortality. A variety of modalities have been used to treat post-operative RVF, including management of volume status, intravenous inotropes and vasodilators, and right-sided mechanical support. Inhaled vasodilator agents are a unique treatment option aimed at minimizing systemic absorption by delivering therapy directly to the pulmonary vasculature...
May 24, 2017: Pharmacotherapy
https://www.readbyqxmd.com/read/28543552/ethical-and-practical-realities-of-using-letters-for-recruitment-in-bereavement-research
#12
Ashleigh E Butler, Helen Hall, Beverley Copnell
Recruitment of participants into bereavement research may present many challenges for the research team. At present, there is little consensus for researchers and ethics committees on the most appropriate method of recruitment. There is some evidence that participants prefer to be contacted about research studies via letters. However, recruitment involving the use of a letter can occur in a number of ways, each with ethical and practical benefits and limitations. In a study of the experiences of bereaved parents, we used letters in three ways: direct mailing from the research team with an opt-out option; permission to mail letters obtained by social workers from a hospital-based follow-up program during routine contact; and letters mailed from the hospital's PICU research nurse at the hospital with instruction on how to opt in...
May 25, 2017: Research in Nursing & Health
https://www.readbyqxmd.com/read/28542901/mechanisms-and-implications-of-a-type-iv-functional-response-for-short-term-intake-rate-of-dry-matter-in-large-mammalian-herbivores
#13
J C Mezzalira, O J F Bonnet, P C de F Carvalho, L Fonseca, C Bremm, C C Mezzalira, E A Laca
1.The functional response (i.e. the relationship between consumers' intake rate and resource density) is central in plant-herbivore interactions. Its shape and the biological processes leading to it have significant implications for both foraging theory and ecology of grazing systems. 2.A type IV functional response (i.e. dome-shaped relationship) of short-term intake rate of dry matter (intake while grazing) has rarely been reported for large herbivores and the conditions that can lead to it are poorly understood...
May 19, 2017: Journal of Animal Ecology
https://www.readbyqxmd.com/read/28540672/communication-on-safety-of-medicines-in-europe-current-practices-and-general-practitioners-awareness-and-preferences
#14
Sieta T de Vries, Maartje J M van der Sar, Amelia Cupelli, Ilaria Baldelli, Anna Marie Coleman, Dolores Montero, Ivana Šipić, Adriana Andrić, Annika Wennberg, Jane Ahlqvist-Rastad, Petra Denig, Peter G M Mol
INTRODUCTION: National competent authorities (NCAs) for medicines coordinate communication relating to the safety of medicines in Europe. The effectiveness of current communication practices has been questioned, particularly with regard to reaching general practitioners (GPs). OBJECTIVE: The aim of this study was to assess current European NCA safety communication practices and to investigate European GPs' awareness of and preferences for safety communications on medicines...
May 24, 2017: Drug Safety: An International Journal of Medical Toxicology and Drug Experience
https://www.readbyqxmd.com/read/28540144/spondylitis-transmitted-from-infected-aortic-grafts-a-review
#15
REVIEW
Panayiotis D Megaloikonomos, Thekla Antoniadou, Leonidas Dimopoulos, Marcos Liontos, Vasilios Igoumenou, Georgios N Panagopoulos, Efthymia Giannitsioti, Andreas Lazaris, Andreas F Mavrogenis
Graft infection following aortic aneurysms repair is an uncommon but devastating complication; its incidence ranges from <1% to 6% (mean 4%), with an associated perioperative and overall mortality of 12% and 17.5-20%, respectively. The most common causative organisms are Staphylococcus aureus and Escherichia coli; causative bacteria typically arise from the skin or gastrointestinal tract. The pathogenetic mechanisms of aortic graft infections are mainly breaks in sterile technique during its implantation, superinfection during bacteremia from a variety of sources, severe intraperitoneal or retroperitoneal inflammation, inoculation of bacteria during postoperative percutaneous interventions to manage various types of endoleaks, and external injury of the vascular graft...
2017: J Bone Jt Infect
https://www.readbyqxmd.com/read/28539908/a-walk-on-the-wild-side-the-impact-of-music-on-risk-taking-likelihood
#16
Rickard Enström, Rodney Schmaltz
From a marketing perspective, there has been substantial interest in on the role of risk-perception on consumer behavior. Specific 'problem music' like rap and heavy metal has long been associated with delinquent behavior, including violence, drug use, and promiscuous sex. Although individuals' risk preferences have been investigated across a range of decision-making situations, there has been little empirical work demonstrating the direct role music may have on the likelihood of engaging in risky activities...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28539609/manipulation-of-rat-movement-via-nigrostriatal-stimulation-controlled-by-human-visually-evoked-potentials
#17
Bonkon Koo, Chin Su Koh, Hae-Yong Park, Hwan-Gon Lee, Jin Woo Chang, Seungjin Choi, Hyung-Cheul Shin
Here, we report that the development of a brain-to-brain interface (BBI) system that enables a human user to manipulate rat movement without any previous training. In our model, the remotely-guided rats (known as ratbots) successfully navigated a T-maze via contralateral turning behaviour induced by electrical stimulation of the nigrostriatal (NS) pathway by a brain- computer interface (BCI) based on the human controller's steady-state visually evoked potentials (SSVEPs). The system allowed human participants to manipulate rat movement with an average success rate of 82...
May 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28539523/courtship-song-preferences-in-female-zebra-finches-are-shaped-by-developmental-auditory-experience
#18
Yining Chen, Oliver Clark, Sarah C Woolley
The performance of courtship signals provides information about the behavioural state and quality of the signaller, and females can use such information for social decision-making (e.g. mate choice). However, relatively little is known about the degree to which the perception of and preference for differences in motor performance are shaped by developmental experiences. Furthermore, the neural substrates that development could act upon to influence the processing of performance features remains largely unknown...
May 31, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28539522/maintaining-mimicry-diversity-optimal-warning-colour-patterns-differ-among-microhabitats-in-amazonian-clearwing-butterflies
#19
Keith R Willmott, Julia C Robinson Willmott, Marianne Elias, Chris D Jiggins
Mimicry is one of the best-studied examples of adaptation, and recent studies have provided new insights into the role of mimicry in speciation and diversification. Classical Müllerian mimicry theory predicts convergence in warning signal among protected species, yet tropical butterflies are exuberantly diverse in warning colour patterns, even within communities. We tested the hypothesis that microhabitat partitioning in aposematic butterflies and insectivorous birds can lead to selection for different colour patterns in different microhabitats and thus help maintain mimicry diversity...
May 31, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28539423/mnemonic-encoding-and-cortical-organization-in-parietal-and-prefrontal-cortices
#20
Nicolas Y Masse, Jonathan M Hodnefield, David J Freedman
Persistent activity within the frontoparietal network is consistently observed during tasks which require working memory. However, the neural circuit mechanisms underlying persistent neuronal encoding within this network remain unresolved. Here, we ask how neural circuits support persistent activity by examining population recordings from posterior parietal (PPC) and prefrontal (PFC) cortices in two male monkeys that performed spatial and motion direction based tasks that required working memory. While spatially selective persistent activity was observed in both areas, robust selective persistent activity for motion direction was only observed in PFC...
May 24, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
keyword
keyword
117799
1
2
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"