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https://www.readbyqxmd.com/read/28937772/terahertz-light-matter-interaction-beyond-unity-coupling-strength
#1
Andreas Bayer, Marcel Pozimski, Simon Schambeck, Dieter Schuh, Rupert Huber, Dominique Bougeard, Christoph Lange
Achieving control over light-matter interaction in custom-tailored nanostructures is at the core of modern quantum electrodynamics. In strongly and ultrastrongly coupled systems, the excitation is repeatedly exchanged between a resonator and an electronic transition at a rate known as the vacuum Rabi frequency ΩR. For ΩR approaching the resonance frequency ωc, novel quantum phenomena including squeezed states, Dicke superradiant phase transitions, the collapse of the Purcell effect, and a population of the ground state with virtual photon pairs are predicted...
September 22, 2017: Nano Letters
https://www.readbyqxmd.com/read/28936283/influence-of-thermal-and-mechanical-fatigue-on-the-shear-bond-strength-of-different-all-ceramic-systems
#2
Hugo-Alberto Vidotti, Jefferson-Ricardo Pereira, Elizeu Insaurralde, Luiz F Plaça, José R Delben, Accácio-Lins do Valle
BACKGROUND: To evaluate the influence of thermal and mechanical fatigue on the shear bond strength of different all-ceramic cores and veneering porcelain interfaces. MATERIAL AND METHODS: All-ceramic systems tested were lithium disilicate and zirconia veneered by layering technique. Sixty specimens (n=20) were subjected to shear bond strength. Ten of them were thermal and mechanical cycled. Fracture analysis was performed with stereomicroscopy and scanning electron microscopy...
August 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28934550/structural-and-mechanical-roles-for-the-c-terminal-non-repetitive-domain-become-apparent-in-recombinant-spider-aciniform-silk
#3
Lingling Xu, Thierry Lefèvre, Kathleen E Orrell, Qing Meng, Michèle Auger, Xiang-Qin Liu, Jan K Rainey
Spider aciniform (or wrapping) silk is the toughest of the seven types of spider silks/glue due to a combination of high elasticity and strength. Like most spider silk proteins (spidroins), aciniform spidroin (AcSp1) has a large core repetitive domain flanked by relatively short N- and C-terminal non-repetitive domains (the NTD and CTD, respectively). The major ampullate silk protein (MaSp) CTD has been shown to control protein solubility and fiber formation, but the aciniform CTD function remains unknown. Here, we compare fiber mechanical properties, solution-state structuring, and fibrous state secondary structural composition and orientation relative to native aciniform silk for two AcSp1 repeat units with or without fused AcSp1- and MaSp-derived CTDs alongside three AcSp1 repeat units without a CTD...
September 21, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28931274/avidin-biotin-bioinspired-platform-for-dual-in-vivo-18f-pet-nirf-molecular-imaging
#4
Annelaure Damont, Raphael Boisgard, Frédéric Dollé, Morgane Hollocou, Bertrand Kuhnast
The complementary nature of positron emission tomography (PET) and near-infrared fluorescence (NIRF) imaging makes the development of innovative multimodal PET/NIRF probes a very exciting prospect. Herein, the bioinspired design of novel platform exploiting the strength and specificity of interactions between radioactive and fluorescent biotin derivatives and an avidin core is reported. The combination of an original [18F]fluoropyridinylated-biotin derivative and commercially available fluorescent biotin derivatives (Atto-425® and Atto-680®) is investigated...
September 20, 2017: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/28928477/a-generic-method-to-synthesise-graphitic-carbon-coated-nanoparticles-in-large-scale-and-their-derivative-polymer-nanocomposites
#5
Nannan Wang, Zhuxian Yang, Fang Xu, Kunyapat Thummavichai, Hongmei Chen, Yongde Xia, Yanqiu Zhu
A versatile Rotary Chemical Vapour Deposition (RCVD) technique for the in-situ synthesis of large scale carbon-coated non-magnetic metal oxide nanoparticles (NPs) is presented, and a controllable coating thickness varying between 1-5 nm has been achieved. The technique has significantly up-scaled the traditional chemical vapour deposition (CVD) production for NPs from mg level to 10 s of grams per batch, with the potential for continuous manufacturing. The resulting smooth and uniform C-coatings sheathing the inner core metal oxide NPs are made of well-crystallised graphitic layers, as confirmed by electron microscopy imaging, electron dispersive spectrum elemental line scan, X-ray powder diffractions and Raman spectroscopy...
September 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28919056/an-exploration-of-person-centred-concepts-in-human-services-a-thematic-analysis-of-the-literature
#6
REVIEW
Rebecca A Waters, Angus Buchanan
Being 'person-centred' in the delivery of health and human services has become synonymous with quality care, and it is a core feature of policy reform in Australia and other Western countries. This research aimed to identify the uses, definitions and characteristics of the term 'person-centred' in the ageing, mental health and disability literature. A thematic analysis identified seven common core themes of person-centredness: honouring the person, being in relationship, facilitating participation and engagement, social inclusion/citizenship, experiencing compassionate love, being strengths/capacity focussed, and organisational characteristics...
September 8, 2017: Health Policy
https://www.readbyqxmd.com/read/28914796/enhanced-interface-structure-and-properties-of-titanium-carbonitride-based-cermets-with-the-extra-solid-phase-reaction
#7
Nan Lin, Yuehui He, Xiyue Kang
In this paper, the influence of the extra solid phase reaction on the interface structure and mechanical properties of titanium carbonitride-based cermets were investigated. The extra solid phase reaction in the preparation process of cermets could induce the formation of a core/rim/binder interface with the coherent structure and reinforce the interface bonding strength in cermets. The existence of a coherent structure interface can inhibit crack spread and improve the toughness and abrasion resistance of titanium carbonitride-based cermets significantly...
September 15, 2017: Materials
https://www.readbyqxmd.com/read/28914544/fabrication-of-hollow-silica-microspheres-with-orderly-hemispherical-protrusions-and-capability-for-heat-induced-controlled-cracking
#8
Makoto Takafuji, Nanami Hano, Md Ashraful Alam, Hirotaka Ihara
Hollow silica microspheres with orderly protrusions on their outer and inner surfaces were fabricated in three simple steps: (1) suspension polymerization of a polymerizable monomer containing silica nanoparticles to obtain polymeric microspheres with a layered shell of silica particles; (2) sol-gel reaction of tetraethoxysilane (TEOS) on the surface of the microspheres to connect the silica nanoparticles; (3) removal of polymer core by calcination. The shell composed of silica-connected silica nanoparticles remained spherical even after calcination, and the characteristic surface morphology with protrusions were obtained on both inner and outer surfaces...
September 15, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28914174/-dis-entangling-barad-materialisms-and-ethics
#9
Gregory Hollin, Isla Forsyth, Eva Giraud, Tracey Potts
In the wake of the widespread uptake of and debate surrounding the work of Karen Barad, this article revisits her core conceptual contributions. We offer descriptions, elaborations, problematizations and provocations for those intrigued by or invested in this body of work. We examine Barad's use of quantum physics, which underpins her conception of the material world. We discuss the political strengths of this position but also note tensions associated with applying quantum physics to phenomena at macro-scales...
September 1, 2017: Social Studies of Science
https://www.readbyqxmd.com/read/28912731/long-term-athletic-development-in-youth-alpine-ski-racing-the-effect-of-physical-fitness-ski-racing-technique-anthropometrics-and-biological-maturity-status-on-injuries
#10
Lisa Müller, Carolin Hildebrandt, Erich Müller, Christian Fink, Christian Raschner
Alpine ski racing is known to be a sport with a high risk of injuries. Because most studies have focused mainly on top-level athletes and on traumatic injuries, limited research exists about injury risk factors among youth ski racers. The aim of this study was to determine the intrinsic risk factors (anthropometrics, biological maturity, physical fitness, racing technique) for injury among youth alpine ski racers. Study participants were 81 youth ski racers attending a ski boarding school (50 males, 31 females; 9-14 years)...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28905949/electronic-and-molecular-structure-relations-in-diiron-compounds-mimicking-the-fefe-hydrogenase-active-site-studied-by-x-ray-spectroscopy-and-quantum-chemistry
#11
Ramona Kositzki, Stefan Mebs, Nils Schuth, Nils Leidel, Lennart Schwartz, Michael Karnahl, Florian Wittkamp, Daniel Daunke, Andreas Grohmann, Ulf-Peter Apfel, Frédéric Gloaguen, Sascha Ott, Michael Haumann
Synthetic diiron compounds of the general formula Fe2(μ-S2R)(CO)n(L)6-n (R = alkyl or aromatic groups; L = CN(-) or phosphines) are versatile models for the active-site cofactor of hydrogen turnover in [FeFe]-hydrogenases. A series of 18 diiron compounds, containing mostly a dithiolate bridge and terminal ligands of increasing complexity, was characterized by X-ray absorption and emission spectroscopy in combination with density functional theory. Fe K-edge absorption and Kβ main-line emission spectra revealed the varying geometry and the low-spin state of the Fe(i) centers...
September 14, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28898724/flexural-strength-of-fiber-reinforced-posts-after-mechanical-aging-by-simulated-chewing-forces
#12
Özgür Irmak, Batu Can Yaman, Dong Yong Lee, Ekim Onur Orhan, Francis K Mante, Fusun Ozer
This study evaluated the effect of simulated chewing forces on the flexural strength of fiber reinforced posts (FRPs). Four different brands of FRPs were selected as main group for the study: RelyX Fiber Post (RX), IceLight (ICE), Unicore Posts (UC), FlouroPost (FP). Ten posts in each main group didn't receive any aging process and tested as baseline (BL), other ten posts were subjected to simulated chewing forces/mechanical aging (MA) as follows: Post spaces were prepared in acrylic with drill. Depth of preparation was adjusted to leave 4-mm coronal part of posts protruding from canals...
September 5, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28895249/salt-responsive-morphologies-of-ssdna-based-triblock-polyelectrolytes-in-semi-dilute-regime-effect-of-volume-fractions-and-polyelectrolyte-length
#13
Nan K Li, Huihui Kuang, William H Fuss, Stefan Zauscher, Efrosini Kokkoli, Yaroslava G Yingling
A comprehensive study is reported on the effect of salt concentration, polyelectrolyte block length, and polymer concentration on the morphology and structural properties of nanoaggregates self-assembled from BAB single-strand DNA (ssDNA) triblock polynucleotides in which A represents polyelectrolyte blocks and B represents hydrophobic neutral blocks. A morphological phase diagram above the gelation point is developed as a function of solvent ionic strength and polyelectrolyte block length utilizing an implicit solvent ionic strength method for dissipative particle dynamics simulations...
September 12, 2017: Macromolecular Rapid Communications
https://www.readbyqxmd.com/read/28891102/co-oxidation-by-group-3-metal-monoxide-cations-supported-on-fe-co-4-2
#14
Mingfei Zhou, Chaoxian Chi, Hui Qu, Luyan Meng, Fanchen Kong, Mingbiao Luo
Infrared photodissociation spectroscopy of anions in the form of OMFe(CO)5- (M=Sc, Y, La) indicates that all these anions involve an 18-electron [Fe(CO)4]2- building block that is bonded with the M center through two bridged carbonyl ligands. The OLaFe(CO)5- anion is determined to be a CO-tagged complex involving a [Fe(CO)4]2-[LaO]+ anion core. In contrast, the OYFe(CO)5- anion is characterized to have a [Fe(CO)4]2-[Y(η2-CO2)]+ structure involving a side-on bonded CO2 ligand. The CO-tagged complex and the [Fe(CO)4]2-[Sc(η2-CO2)]+ isomer co-exist for the OScFe(CO)5- anion...
September 10, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28886951/strength-comparison-of-anterior-teeth-restored-with-ceramic-endocrowns-vs-custom-made-post-and-cores
#15
Beata Dejak, Andrzej Młotkowski
PURPOSE: The aim of the study was to compare strength of the anterior teeth restored with ceramic endocrowns versus custom-made post and core. METHODS: The investigation used the finite element analysis. Three 3-D models of maxillary central incisor were created: model A-tooth restored with metal post and core with ceramic crown; model B-tooth with leucite ceramic endocrown; model C-tooth with lithium disilicate ceramic endocrown. Each model was subjected to a 100N force applied at a distance of 5mm from the incisal edge, at the angle of 130° to the long axis of the tooth...
September 5, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28886473/strategies-for-injury-prevention-in-brazilian-football-perceptions-of-physiotherapists-and-practices-of-premier-league-teams
#16
Maurício Couto Meurer, Marcelo Faria Silva, Bruno Manfredini Baroni
OBJECTIVES: To describe the physiotherapists perceptions and the current practices for injury prevention in elite football (soccer) clubs in Brazil. DESIGN: Cross-sectional study. SETTING: Group of Science in Sports & Exercise, Federal University of Healthy Sciences of Porto Alegre (Brazil). PARTICIPANTS: 16 of the 20 football clubs involved in the Brazilian premier league 2015. MAIN OUTCOME MEASURES: Physiotherapists answered a structured questionnaire...
July 25, 2017: Physical Therapy in Sport
https://www.readbyqxmd.com/read/28883803/basic-emotions-in-human-neuroscience-neuroimaging-and-beyond
#17
REVIEW
Alessia Celeghin, Matteo Diano, Arianna Bagnis, Marco Viola, Marco Tamietto
The existence of so-called 'basic emotions' and their defining attributes represents a long lasting and yet unsettled issue in psychology. Recently, neuroimaging evidence, especially related to the advent of neuroimaging meta-analytic methods, has revitalized this debate in the endeavor of systems and human neuroscience. The core theme focuses on the existence of unique neural bases that are specific and characteristic for each instance of basic emotion. Here we review this evidence, outlining contradictory findings, strengths and limits of different approaches...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28874117/bufet-boosting-the-unbiased-mirna-functional-enrichment-analysis-using-bitsets
#18
Konstantinos Zagganas, Thanasis Vergoulis, Maria D Paraskevopoulou, Ioannis S Vlachos, Spiros Skiadopoulos, Theodore Dalamagas
BACKGROUND: A group of miRNAs can regulate a biological process by targeting genes involved in the process. The unbiased miRNA functional enrichment analysis is the most precise in silico approach to predict the biological processes that may be regulated by a given miRNA group. However, it is computationally intensive and significantly more expensive than its alternatives. RESULTS: We introduce BUFET, a new approach to significantly reduce the time required for the execution of the unbiased miRNA functional enrichment analysis...
September 6, 2017: BMC Bioinformatics
https://www.readbyqxmd.com/read/28870022/playing-to-our-human-strengths-to-prepare-medical-students-for-the-future
#19
Julie Chen
We are living in an age where artificial intelligence and astounding technological advances are bringing truly remarkable change to healthcare. Medical knowledge and skills which form the core responsibility of doctors such as making diagnoses may increasingly be delivered by robots. Machines are gradually acquiring human abilities such as deep learning and empathy. What, then is the role of doctors in future healthcare? And what direction should medical schools be taking to prepare their graduates? This article will give an overview of the evolving technological landscape of healthcare and examine the issues undergraduate medical education may have to address...
September 2017: Korean Journal of Medical Education
https://www.readbyqxmd.com/read/28869714/ultrafast-vibrational-dynamics-of-membrane-bound-peptides-at-the-lipid-bilayer-water-interface
#20
Junjun Tan, Baixiong Zhang, Yi Luo, Shuji Ye
Vibrational energy transfer (VET) of proteins at cell membrane plays critical roles in controlling the protein functionalities, but its detection is very challenging. By using a surface-sensitive femtosecond time-resolved sum-frequency generation vibrational spectroscopy with infrared pump, the detection of the ultrafast VET in proteins at cell membrane has finally become possible. The vibrational relaxation time of the N-H groups is determined to be 1.70(±0.05) ps for the α-helix located in the hydrophobic core of the lipid bilayer and 0...
September 4, 2017: Angewandte Chemie
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