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https://www.readbyqxmd.com/read/28742326/tellurium-impregnated-porous-cobalt-doped-carbon-polyhedra-as-superior-cathode-for-lithium-tellurium-batteries
#1
Jiarui He, Weiqiang Lv, Yuanfu Chen, Kechun Wen, Chen Xu, Wanli Zhang, Yanrong Li, Wu Qin, Weidong He
Lithium-tellurium (Li-Te) batteries are attractive for energy storage owing to a high theoretical volumetric capacity of 2621 mAh cm-3. In this work, highly nanoporous cobalt and nitrogen co-doped carbon polyhedra (C-Co-N) derived from metal-organic framework (MOF) is synthesized and employed as tellurium host for Li-Te batteries. The Te@C-Co-N cathode with a high Te loading of 77.2 wt% exhibits record-breaking electrochemical performances including an ultrahigh initial capacity of 2615.2 mAh cm-3 approaching the theoretical capacity of Te (2621 mAh cm-3), a superior cycling stability with a high capacity retention of 93...
July 25, 2017: ACS Nano
https://www.readbyqxmd.com/read/28741958/observing-imperfection-in-atomic-interfaces-for-van-der-waals-heterostructures
#2
Aidan P Rooney, Aleksey Kozikov, Alexander N Rudenko, Eric Prestat, Matthew J Hamer, Freddie Withers, Yang Cao, Kostya S Novoselov, Mikhail I Katsnelson, Roman Vladislavovich Gorbachev, Sarah J Haigh
Vertically stacked van der Waals heterostructures are a lucrative platform for exploring the rich electronic and optoelectronic phenomena in two-dimensional materials. Their performance will be strongly affected by impurities and defects at the interfaces. Here we present the firstsystematic study of interfaces in van der Waals heterostructure using cross sectional scanning transmission electron microscope (STEM) imaging. By measuring interlayer separations and comparing these to density functional theory (DFT) calculations we find that pristine interfaces exist between hBN and MoS2 or WS2 for stacks prepared by mechanical exfoliation in air...
July 25, 2017: Nano Letters
https://www.readbyqxmd.com/read/28741694/reduced-parahippocampal-volume-and-psychosis-symptoms-in-alzheimer-s-disease
#3
Emma McLachlan, Jennifer Bousfield, Robert Howard, Suzanne Reeves
OBJECTIVE: Establishing structural imaging correlates of psychosis symptoms in Alzheimer's disease (AD) could localise pathology and target symptomatic treatment. This study investigated whether psychosis symptoms are associated with visuoperceptual or frontal networks, and whether regional brain volume differences could be linked with the paranoid (persecutory delusions) or misidentification (misidentification phenomena and/or hallucinations) subtypes. METHODS: A total of 104 patients with probable AD (AddNeuroMed; 47 psychotic, 57 non-psychotic), followed up for at least one year with structural MRI at baseline...
July 25, 2017: International Journal of Geriatric Psychiatry
https://www.readbyqxmd.com/read/28740813/social-cognition-in-patients-at-ultra-high-risk-for-psychosis-what-is-the-relation-to-social-skills-and-functioning
#4
Louise B Glenthøj, Birgitte Fagerlund, Carsten Hjorthøj, Jens R M Jepsen, Nikolaj Bak, Tina D Kristensen, Christina Wenneberg, Kristine Krakauer, David L Roberts, Merete Nordentoft
OBJECTIVE: Patients at ultra-high risk (UHR) for psychosis show significant impairments in functioning. It is essential to determine which factors influence functioning, as it may have implications for intervention strategies. This study examined whether social cognitive abilities and clinical symptoms are associated with functioning and social skills. METHODS: The study included 65 UHR patients and 30 healthy controls. Social cognitive function, social skills, and a broad range of functioning measures were assessed...
September 2016: Schizophrenia Research. Cognition
https://www.readbyqxmd.com/read/28738673/promoter-effects-of-alkali-metal-cations-on-the-electrochemical-reduction-of-carbon-dioxide
#5
Joaquin Resasco, Leanne D Chen, Ezra Clark, Charlie Tsai, Christopher Hahn, Thomas F Jaramillo, Karen Chan, Alexis T Bell
The electrochemical reduction of CO2 is known to be influenced by the identity of the alkali metal cation in the electrolyte; however, a satisfactory explanation for this phenomenon has not been developed. Here we present the results of experimental and theoretical studies aimed at elucidating the effects of electrolyte cation size on the intrinsic activity and selectivity of metal catalysts for the reduction of CO2. Experiments were conducted under conditions where the influence of electrolyte polarization is minimal in order to show that cation size affects the intrinsic rates of formation of certain reaction products, most notably for HCOO-, C2H4, and C2H5OH over Cu(100)- and Cu(111)-oriented thin films, and for CO and HCOO- over polycrystalline Ag and Sn...
July 24, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28737914/dft-study-on-the-complexation-of-nota-as-a-bifunctional-chelator-with-radiometal-ions
#6
Fatima Y Adeowo, Bahareh Honarparvar, Adam A Skelton
1,4,7 triazacyclononane-1,4,7 triacetic acid (NOTA) is a key bifunctional chelator utilized for the complexation of metal ions in radiopharmaceutical applications; the ability of these chelators depends on the strength of their binding with ions. The focus of the present work is to evaluate the complexation of Cu2+, Ga3+, Sc3+ and In3+ radiometal ions with NOTA using density functional theory (B3LYP functional) and 6-311+G(2d,2p)/DGDZVP basis sets. The significant role of ion-water interactions in the chelation interaction energies in solution reflects the competition between ion-water and NOTA-ion interaction in the chelation process...
July 24, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28737791/aqueous-ionic-liquids-and-their-influence-on-peptide-conformations-denaturation-and-dehydration-mechanisms
#7
Diddo Diddens, Volker Lesch, Andreas Heuer, Jens Smiatek
Low concentrated aqueous ionic liquids (ILs) and their influence on protein structures have attracted a lot of interest over the last few years. This can be mostly attributed to the fact that aqueous ILs, depending on the ion species involved, can be used as protein protectants or protein denaturants. Atomistic molecular dynamics (MD) simulations are performed in order to study the influence of different aprotic ILs on the properties of a short hairpin peptide. Our results reveal distinct binding and denaturation effects for 1-ethyl-3-methylimidazolium (EMIM) in combination with different anions, namely, chloride (CL), tetrafluoroborate (BF4) and acetate (ACE)...
July 24, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28737780/ultra-low-lattice-thermal-conductivity-and-high-carrier-mobility-of-monolayer-sns2-and-snse2-a-first-principles-study
#8
Aamir Shafique, Abdus Samad, Young-Han Shin
Using density functional theory, we systematically investigate the lattice thermal conductivity and carrier mobility of monolayer SnX2 (X = S, Se). The room-temperature ultra low lattice thermal conductivities found in monolayer SnS2 (6.41 W m(-1) K(-1)) and SnSe2 (3.82 W m(-1) K(-1)) are attributed to the low phonon velocity, low Debye temperature, weak bonding interactions, and strong anharmonicity in monolayer SnX2. The predicted values of lattice thermal conductivity are lower than those of other two-dimensional materials such as stanene, phosphorene, monolayer MoS2, and bulk SnX2...
July 24, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28733647/boiling-and-quenching-heat-transfer-advancement-by-nanoscale-surface-modification
#9
Hong Hu, Cheng Xu, Yang Zhao, Kirk J Ziegler, J N Chung
All power production, refrigeration, and advanced electronic systems depend on efficient heat transfer mechanisms for achieving high power density and best system efficiency. Breakthrough advancement in boiling and quenching phase-change heat transfer processes by nanoscale surface texturing can lead to higher energy transfer efficiencies, substantial energy savings, and global reduction in greenhouse gas emissions. This paper reports breakthrough advancements on both fronts of boiling and quenching. The critical heat flux (CHF) in boiling and the Leidenfrost point temperature (LPT) in quenching are the bottlenecks to the heat transfer advancements...
July 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28731214/from-positive-psychology-to-psychopathology-the-continuum-of-attention-deficit-hyperactivity-disorder
#10
Corina U Greven, Jan K Buitelaar, Giovanni A Salum
BACKGROUND: Integration of positive psychology into clinical research and treatment has been slow. This integration can be facilitated by the conceptualisation of mental disorders as the high, symptomatic extreme of continuous normal variation. This assumes that there is also a low, positive extreme, which is, however, unchartered territory. This study aims to examine how well current measures capture the low extreme of mental disorder continua, using attention-deficit hyperactivity disorder (ADHD) as an example...
July 21, 2017: Journal of Child Psychology and Psychiatry, and Allied Disciplines
https://www.readbyqxmd.com/read/28729844/not-merely-experiential-unconscious-thought-can-be-rational
#11
Katie E Garrison, Ian M Handley
Individuals often form more reasonable judgments from complex information after a period of distraction vs. deliberation. This phenomenon has been attributed to sophisticated unconscious thought during the distraction period that integrates and organizes the information (Unconscious Thought Theory; Dijksterhuis and Nordgren, 2006). Yet, other research suggests that experiential processes are strengthened during the distraction (relative to deliberation) period, accounting for the judgment and decision benefit...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28728513/ingratiation-attempts-in-real-life-determinants-of-their-success
#12
Helmut Lamm
A total of 272 students at a German university were asked to write down the story of an ingratiation attempt they had made and one they had received. They were then asked to reflect on each episode via a questionnaire. All but one participant reported that they had performed at least one of the four tactics postulated in Jones's ingratiation theory: compliments, favor-doing, opinion conformity, and positive self-presentation. In the case of received ingratiation, we found higher success ratings for nondependent (vs...
January 1, 2017: Psychological Reports
https://www.readbyqxmd.com/read/28726452/psychobiography-theory-and-method
#13
William Todd Schultz, Stephanie Lawrence
Psychobiography is best understood as a branch of applied personality science in which experimental findings are used to explore the lives and personalities of public figures, from artists to politicians. This article introduces the field, addresses questions commonly raised about it, and explores, among other subjects, what psychobiographical research might offer to the field of psychology. Two recent model psychobiographies are described in detail-McAdams's (2010) profile of George W. Bush and Kasser's (2013) analysis of John Lennon-both of which are oriented scientifically and rooted in experimentally derived concepts...
July 2017: American Psychologist
https://www.readbyqxmd.com/read/28725369/adding-energy-gradients-and-long-distance-dispersal-to-a-neutral-model-improves-predictions-of-madagascan-bird-diversity
#14
Falko T Buschke, Luc Brendonck, Bram Vanschoenwinkel
Macroecological patterns are likely the result of both stochastically neutral mechanisms and deterministic differences between species. In Madagascar, the simplest stochastically neutral hypothesis - the mid-domain effects (MDE) hypothesis - has already been rejected. However, rejecting the MDE hypothesis does not necessarily refute the existence of all other neutral mechanisms. Here, we test whether adding complexity to a basic neutral model improves predictions of biodiversity patterns. The simplest MDE model assumes that: (1) species' ranges are continuous and unfragmented, (2) are randomly located throughout the landscape, and (3) can be stacked independently and indefinitely...
October 2016: Ecology and Evolution
https://www.readbyqxmd.com/read/28722640/the-role-of-risk-proximity-in-the-beliefs-and-behaviors-related-to-mosquito-borne-diseases-the-case-of-chikungunya-in-french-guiana
#15
Claude Flamand, Camille Fritzell, Pauline Obale, Philippe Quenel, Jocelyn Raude
Human behaviors are increasingly recognized to play a key role in the spread of infectious diseases. Although a set of social and cognitive determinants has been consistently found to affect the adoption of health protective behaviors aiming to control and prevent a variety of infections, little is currently known about the ecological drivers of these behaviors in epidemic settings. In this article, we took advantage of the outbreak of chikungunya, a reemerging mosquito-borne disease, that occurred in French Guiana in 2014-15 to test empirically the assumption proposed by Zielinski-Gutierrez and Hayden that the proximity of the disease and perceptions of the natural environment may considerably shape public response to an emerging health threat...
June 12, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28718193/metacommunity-theory-meets-restoration-isolation-may-mediate-how-ecological-communities-respond-to-stream-restoration
#16
Christopher M Swan, Bryan L Brown
An often-cited benefit of river restoration is an increase in biodiversity or shift in composition to more desirable taxa. Yet, hard manipulations of habitat structure often fail to elicit a significant response in terms of biodiversity patterns. In contrast to conventional wisdom, the dispersal of organisms may have as large an influence on biodiversity patterns as environmental conditions. This influence of dispersal may be particularly influential in river networks which are linear branching, or dendritic, and thus constrain most dispersal to the river corridor...
July 17, 2017: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/28714096/enactors-of-horizontal-violence-the-pathological-bully-the-self-justified-bully-and-the-unprofessional-co-worker
#17
Rosemary A Taylor, Steven S Taylor
AIM: To suggest an alternative approach to improving recognition of horizontal violence using enactor types identified in a study exploring nurses' perceptions of horizontal violence. BACKGROUND: Horizontal violence is an umbrella term used to describe a range of aggressive behaviors between nurse colleagues. It is suggested that nurses do not recognize the phenomenon when they witness or experience it, contributing to its perpetuation. DESIGN: This was a qualitative, descriptive study undertaken to inform theory development and the design of future interventions to address horizontal violence...
July 16, 2017: Journal of Advanced Nursing
https://www.readbyqxmd.com/read/28709320/weak-nanoscale-chaos-and-anomalous-relaxation-in-dna
#18
Alexey K Mazur
Anomalous nonexponential relaxation in hydrated biomolecules is commonly attributed to the complexity of the free-energy landscapes, similarly to polymers and glasses. It was found recently that the hydrogen-bond breathing of terminal DNA base pairs exhibits a slow power-law relaxation attributable to weak Hamiltonian chaos, with parameters similar to experimental data. Here, the relationship is studied between this motion and spectroscopic signals measured in DNA with a small molecular photoprobe inserted into the base-pair stack...
June 2017: Physical Review. E
https://www.readbyqxmd.com/read/28709012/de-escalation-of-aggressive-behaviour-in-healthcare-settings-concept-analysis
#19
REVIEW
Nutmeg Hallett, Geoffrey L Dickens
BACKGROUND: De-escalation is the recommended first-line response to potential violence and aggression in healthcare settings. Related scholarly activity has increased exponentially since the 1980s, but there is scant research about its efficacy and no guidance on what constitutes the gold standard for practice. OBJECTIVES: To clarify the concept of de-escalation of violence and aggression as described within the healthcare literature. DESIGN: Concept analysis guided by Rodgers' evolutionary approach...
July 4, 2017: International Journal of Nursing Studies
https://www.readbyqxmd.com/read/28707655/-the-fus-protein-physiological-functions-and-a-role-in-amyotrophic-lateral-sclerosis
#20
A D Efimova, R K Ovchinnikov, A Yu Roman, A V Maltsev, V V Grigoriev, E A Kovrazhkina, V I Skvortsova
Certain forms of amyotrophic lateral sclerosis (ALS) are associated with an altered compartmentalization of FUS and its aggregation in the cytoplasm of motoneurons. FUS is a DNA/RNA-binding protein that is involved in DNA repair and the regulation of transcription, splicing, RNA transport, and local translation. Two theories have been proposed to explain the mechanism of the pathophysiological process in ALS. The theories attribute degeneration of motor neurons to either loss or gain of FUS function. The review describes the main physiological functions of FUS and considers evidence for each of the theories of ALS pathogenesis...
May 2017: Molekuliarnaia Biologiia
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