Search Results
Results 1 - 50 of 971
1 2 3 4 5 6 7 8 9 10 >
Ashley Noah T NT Department of Biology, Western Kentucky University, Bowling Green, KY, USA - - 2014
Most organisms in temperate or tropic regions employ the light-dark (LD) cycle as the primary Zeitgeber to synchronize circadian rhythms. At higher latitudes (>66°33'), continuous illumination during the summer presents a significant time-keeping dilemma for polar-adapted species. Lapland longspurs (Calcarius lapponicus), arctic-breeding migratory songbirds, are one of the few recorded ...
Kalinoski Mieka M Oceanographic Center, Nova Southeastern University, 8000 N. Ocean Drive, Dania Beach, FL, 33004, - - 2014
We used electroretinography (ERG) to determine spectral and luminous sensitivities, and the temporal resolution (flicker fusion frequency, FFF) in three sympatric (but phylogenetically distant) coastal shark species: Carcharhinus plumbeus (sandbar shark), Mustelus canis (smooth dogfish), and Squalus acanthias (spiny dogfish). Spectral sensitivities were similar (range ~400-600 nm, peak sensitivity ~470 nm), with ...
Park J J Università di Torino, Dipartimento di Chimica and NIS Interdepartmental Centre, Via Giuria 7, I-10125, Torino, Italy. - - 2014
Two novel symmetrical blue squaraine sensitizers were synthesized, which exhibit panchromatic light harvesting and a record efficiency over 6% with Jsc exceeding 14 mA cm(-2), and Voc over 620 mV under 1 sun. Their color, low cost, easiness of synthesis, and relatively high photo- and thermal stability open up the ...
Pilz Luísa K LK Laboratório de Etnofarmacologia, Departamento de Farmacologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul. Rua Sarmento Leite , Porto Alegre, RS , Brazil - - 2014
Circadian rhythm disturbances are among the risk factors for depression, but specific animal models are lacking. This study aimed to characterize the effects of acute rhythm disruption in mice and investigate the effects of imipramine and N-acetylcysteine (NAC) on rhythm disruption-induced changes. Mice were exposed to 12:12-hour followed by 10:10-hour ...
van der Vinne Vincent V Chronobiology Unit, Centre for Behaviour and Neurosciences, University of Groningen, 9747 AG, Groningen, The Netherlands; - - 2014
The mammalian circadian system synchronizes daily timing of activity and rest with the environmental light-dark cycle. Although the underlying molecular oscillatory mechanism is well studied, factors that influence phenotypic plasticity in daily activity patterns (temporal niche switching, chronotype) are presently unknown. Molecular evidence suggests that metabolism may influence the circadian ...
Swanson William H WH *PhD, FAAO †OD, FAAO ‡OD, MS, FAAO §MD, PhD Indiana University School of Optometry, Bloomington, Indiana (WHS, VEM, JKT, BMS, DGH); State University of New York (SUNY) College of Optometry, New York, New York (MWD); and NIHR Biomedical Research Centre for Ophthalmology at Moorfields Eye Hospital NHS Foundation Trust and UCL Institute of Ophthalmology, London, United Kingdom - - 2014
To compare conventional structural and functional measures of glaucomatous damage with a new functional measure-contrast sensitivity perimetry (CSP-2). One eye each was tested for 51 patients with glaucoma and 62 age-similar control subjects using CSP-2, size III 24-2 conventional automated perimetry (CAP), 24-2 frequency-doubling perimetry (FDP), and retinal nerve fiber ...
Wu Xuefang X Virginia Tech, Grado Department of Industrial and Systems Engineering (0118), Blacksburg, VA 24061, United States. Electronic address: - - 2014
Impaired foot plantar sensitivity has been hypothesized among individuals who are obese, and may contribute to their impaired balanced during quiet standing. The objective of this study was to investigate the effects of obesity on plantar sensitivity, and explore the relationship between plantar sensitivity and balance during quiet standing. Thirty-nine ...
Ben Ammar I I Unité de Recherche Animal et Fonctionnalités des Produits Animaux, USC INRA 340, Université de Lorraine, 54505, Vandœuvre-lès-Nancy, France, - - 2014
The effect of a constant photoperiod on the inhibition of male and female reproductive cycles was studied in pikeperch Sander lucioperca. Over a 153-day period, batches of pikeperch (2 years, 950 g) breeders were kept under either under natural or artificial photoperiod conditions (24L:0D) (30-35 fish/tank, triplicate) and sampled in late June ...
Shahidi A M AM Toronto Western Research Institute, University Health Network, Toronto, Ontario, - - 2014
To investigate the effect of increased CO2 levels on flicker defined stimuli. The sensitivity of two flicker defined tasks was measured in nine healthy, trained observers using the Flicker Defined Form (FDF) stimulus of the Heidelberg Edge Perimeter (HEP; Heidelberg Engineering) and Frequency Doubling Technology (FDT) stimulus of the Matrix ...
Patil Basavaprabhu L BL Danforth Plant Science Center, 975 N. Warson Rd., St. Louis, MO 63132, - - 2014
RNA silencing is a sequence-specific post-transcriptional gene inactivation mechanism that operates in diverse organisms and which can extend beyond its site of initiation, owing to the movement of the silencing signal, called non-autonomous gene silencing. Previous studies have shown that several factors manifest the movement of silencing signal, such as, ...
SzymaƄska Renata R Department of Medical Physics and Biophysics, Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, Reymonta 19, 30-059, Krakow, - - 2014
During their lifetime, plants need to adapt to a changing environment, including light and temperature. To understand how these factors influence plant growth, we investigated the physiological and antioxidant responses of two Arabidopsis accessions, Shahdara (Sha) from the Shahdara valley (Tajikistan, Central Asia) in a mountainous area and Lovvik-5 (Lov-5) ...
Frank Sebastian M SM University of - - 2014
The central hub of the cortical vestibular network in humans is likely localized in the region of posterior lateral sulcus. An area characterized by responsiveness to visual motion has previously been described at a similar location and named posterior insular cortex (PIC). Currently it is not known whether PIC processes ...
Katiyar Ajit Kumar - - 2014
Well separated Si/ZnS radial nanowire heterojunction based light emitting devices have been fabricated on large area substrates, by depositing n-ZnS film on p-type nano-porous Si nanowire templates. Vertically oriented porous Si nanowires on p-Si substrates have been grown by metal assisted chemical etching catalyzed using Au nanoparticles. Isolated Si nanowires ...
Frommer Jennifer J Ernst Moritz Arndt University Greifswald, Institute for Biochemistry, Felix Hausdorff Str. 4, D-17487 Greifswald, - - 2014
Ribozymes have been known for about 30 years, and nowadays are understood well enough to be turned into useful tools for a number of applications in vitro and in vivo. Allosteric ribozymes switch on and off their activity in response to a specific chemical (ligand) or physical (temperature, light) signal. ...
Teng Yue Y CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026, PR China; Department of Chemistry, University of Science and Technology of China, Jin Zhai Road 96, Hefei, 230026, PR - - 2014
Metastable γ-Ga2 O3 nanoflowers assembled from hexagonal nanopetals are successfully constructed by the oxidation of metallic Ga in acetone solution. The nanoflowers with a hollow interior structure exhibit a short response time and a large light current-dark current ratio under a relatively low bias voltage, suggesting an especially important potential ...
Heeres Reinier - - 2014
The spatial structure of light with Orbital Angular Momentum, or "twisted light", closely resembles the shape of atomic wavefunctions. It could therefore make symmetry-forbidden transitions in quantum dots possible. However, the vanishing intensity in the center of an OAM beam usually makes this effect weak. Here we show a plasmonic ...
Kumar Raju R Centre for Nano Materials, International Advanced Research Centre for Powder Metallurgy and New Materials, Hyderabad 500005, - - 2014
Herein, we report the development of a ZnO-based visible-light-driven photocatalyst by interfacial charge transfer process for the inactivation of pathogens under visible-light illumination. Surface modification by a cocatalyst on ZnO, prepared by flame spray pyrolysis process is carried out to induce the visible-light absorption in ZnO. Optical studies showed that ...
da Fontoura Frasca Luis Carlos LC *Associate Professor, Department of Conservative Dentistry, School of Dentistry, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil. †Private Practice, Porto Alegre, Brazil. ‡Adjunct Professor, Department of Conservative Dentistry, School of Dentistry, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil. §Adjunct Professor, Department of Implant Odontology and Prosthodontics, School of Dentistry, Universidade Luterana do Brasil, Canoas, - - 2014
To compare retention forces of 3 overdenture attachment systems with metal and plastic components. Four samples of each system evaluated (Ball-Attachment [metal]; O-Ring, and ERA [plastic]) were prepared and underwent fatigue and retention force in a universal testing machine. Maximum retention force (N) was measured at 6 time points (from ...
Cheloni Giulia G Environmental Biogeochemistry and Ecotoxicology, Institute F.-A. Forel, Earth and Environmental Sciences, Faculty of Sciences, University of Geneva, 10, Route de Suisse, CH-1290 Versoix, - - 2014
The present study showed the important role of light intensity and spectral composition on Cu uptake and effects on green alga Chlamydomonas reinhardtii. High-intenisty light (HL) increased cellular Cu concentrations, but mitigated the Cu-induced decrease in chlorophyll fluorescence, oxidative stress and lipid peroxidation at high Cu concentrations, indicating that Cu ...
Amani Samreen S Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, 202002, - - 2014
Misfolding and aggregation of proteins is involved in some of the most prevalent neurodegenerative disorders. The importance of collagen stems from the fact that it is one of the dominant component used for tissue engineering and drug delivery applications and is a major component of skin, tendon, bone and other ...
Chang Pingjing P State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China. zhaofy@ciac.ac.cn - - 2014
The photocatalytic activity of CdS/P25 hybrid catalysts was studied under visible-light irradiation. The CdS quantum dots sensitized P25 (CdS QDs-P25) showed extremely enhanced activity in the reduction of o-chloronitrobenzene (o-CNB) by comparing to CdS-P25 prepared by the direct deposition-precipitation method in the presence of HCOOH. The synergistic effects between CdS ...
Ho My Duyen MD School of Chemical Engineering, Sungkyunkwan University, Suwon, 440-746, South - - 2014
About 30 nm quantum-dot thin films are formed by electrospray deposition (ESD) process and quantum-dot-light-emitting-diodes (QD-LEDs) are demonstrated. Maximum brightness of 23 000 cd m(-2) and current efficiency of 5.9 cd A(-1) are achieved with the ESD process. The ESD process can be a potential solution for large area quantum ...
Echtermeyer Tim J - - 2014
Graphene's high mobility and Fermi velocity, combined with its constant light absorption in the visible to far-infrared range, make it an ideal material to fabricate high-speed and ultra-broadband photodetectors. However, the precise mechanism of photodetection is still debated. Here, we report wavelength and polarization dependent measurements of metal-graphene-metal photodetectors. This ...
Rivera Debra S DS Department of Neurophysics, Max Planck Institute for Human Cognitive and Brain Sciences, Stephanstrasse 1a, 04103, Leipzig, Germany, - - 2014
To identify a shielding material compatible with optical head-motion tracking for prospective motion correction and which minimizes radio frequency (RF) radiation losses at 7 T without sacrificing line-of-sight to an imaging target. We evaluated a polyamide mesh coated with silver. The thickness of the coating was approximated from the composition ratio ...
Wang Feng F Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario, Canada, N2L - - 2014
Zwitterionic phosphotydylcholine lipo-somes stably adsorb a number of metal oxide nanoparticles via its phosphate group. This is different from physisorption and fusion with SiO2 . The hybrid materials can be internalized by cancer cells and TiO2 allows light controlled liposome content release.
Skordos Dimitrios - - 2014
We report a study that explored the mechanisms used in hypothesizing meanings for novel motion predicates (verbs and prepositions) cross-linguistically. Motion stimuli were presented to English- and Greek-speaking adults and preschoolers accompanied by (a) a novel intransitive verb, (b) a novel transitive verb, (c) a novel transitive preposition, or (d) ...
Liu Siqi S State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou, 350002, P. R. China. - - 2014
Branched hierarchical CdS/ZnO nanocomposites have been synthesized for application toward photocatalytic fine-chemical synthesis. Growing ZnO nanorods on the surface of CdS nanowires boosts the light harvesting efficiency and charge separation as well as fast charge transport and collection. A Z-scheme mechanism under artificial solar light is also proposed.
Zhang Jian J Key Laboratory of Soft Chemistry and Functional Materials, Nanjing University of Science and Technology, Ministry of Education, Nanjing 210094, China. - - 2014
CdS quantum dot/vermiculite (CdS/VMT) nanocomposites have been synthesized via a facile one-step method and characterized by X-ray diffraction, UV-vis diffuse reflection spectroscopy, X-ray photoelectron spectroscopy, and transmission electron microscopy. The photocatalytic hydrogen generation activities of these samples were evaluated using Na2S and Na2SO3 as sacrificial reagents in water under visible-light ...
Rothau Sergej - - 2014
Optical components manipulating both polarization and phase of wave fields find many applications in today's optical systems. With modern lithography methods it is possible to fabricate optical elements with nanostructured surfaces from different materials capable of generating spatially varying, locally linearly polarized-light distributions, tailored to the application in question. Since ...
Zhang W - - 2014
New demonstrations of effective interaction between light and artificially electromagnetic interface, or the metasurface, have stimulated intensive research interests on control of light to realize applications in beam steering, optical imaging and light focusing, etc. Here we reported a new type of planar metasurface of which every individual metamolecule is ...
Zhang Min - - 2014
In this letter, metal-semiconductor-metal (MSM) solar-blind photodetector was fabricated on LaAlO3 (110) substrates with Pt and Au electrodes. The substrate material was characterized by XRD and UV-visible absorption spectrum. At 10 V bias, the photodetector with Pt electrodes shows a very low dark current of 4.1 pA, which is much ...
Wang Hongyi - - 2014
We present a novel self-powered chip to detect the direction of incident light. This chip directly provides digitized output without the need of any off-chip power supply or optical or mechanical components. The chip was implemented in a standard 0.5 μm CMOS process. A microscale metal baffle was created by stacking ...
Zdoryk Oleksandr A - - 2014
The physical and chemical stability of a stock preparation ointment with active ingredients-herbal tinctures of calendula and arnica-for the treatment of hemorrhoids was studied. Evaluations for physical and chemical stability were performed initially and throughout the storage period. Physical stability of the ointment was assessed by means of visual observation ...
Babazadeh Amin - - 2014
In this paper we present a novel method to reliably strip the unwanted cladding light in high-power fiber lasers. Soft metals are utilized to fabricate a high-power cladding light stripper (CLS). The capability of indium (In), aluminum (Al), tin (Sn), and gold (Au) in extracting unwanted cladding light is examined. ...
Kochuveedu Saji Thomas ST Department of Chemistry and Nano Science, Global Top 5 Research Program, Division of Molecular and Life Sciences, College of Natural Sciences, Ewha Womans University, 52, Ewhayeodae-gil, Seodaemun-gu, Seoul, Korea. - - 2014
The interaction between light and matter is the fundamental aspect of many optoelectronic applications. The efficiency of such devices is mainly dictated by the light emitting properties of fluorophores. Unfortunately, the intensity of emission is adversely affected by surface defects, scattering and chemical instability. Therefore, enhancing the luminescence of fluorophores ...
Kohl Jesse - - 2014
The light outcoupling efficiency of organic light-emitting optoelectronic devices is severely limited by excitation of tightly bound surface plasmon polaritons at the metal electrodes. We present a theoretical study of an organic semiconductor-silver-SiO<sub>2</sub> waveguide and demonstrate that by simple tuning of metal film thickness and the emission regime of the ...
Grant Stephen D - - 2014
Azimuthal and radial polarization states of light are used to produce conical diffraction (CD) from a KGd(WO<sub>4</sub>)<sub>2</sub> crystal. The patterns produced in the ring plane in each case display marked differences than those seen when linearly polarized incident light is used, with the production of a splitting of the CD ...
Nachtigall Paul E PE Hawaii Inst. of Marine Biology, Univ. of Hawaii, P.O. Box 1106, Kailua, HI 96734, - - 2014
Work on hearing during echolocation has demonstrated that a whale was capable of changing its hearing sensitivity while it echolocated, perhaps to protect its hearing from its own intense emitted pulses. Would a whale similarly change hearing sensitivity when warned prior to receiving a loud sound? Hearing was measured using ...
Mooney T Aran TA Biology Dept., Woods Hole Oceanogr. Inst., 266 Woods Hole Rd., Woods Hole, MA 02543, - - 2014
Odontocetes use sound for vital biological functions such as foraging, navigation, and communication, and hearing is considered their primary sensory modality. Yet, hearing abilities within wild species or populations are essentially unknown. Hearing sensitivities and variations can greatly influence biosonar signals and performance. Here we present the hearing abilities of ...
Gu Lijun L Key Laboratory of Chemistry in Ethnic Medicinal Resources, State Ethnic Affairs Commission & Ministry of Education, Yunnan University of Nationalities, Kunming, Yunnan 650500, China. - - 2014
6-Aryl substituted phenanthridines were synthesized via a visible-light-catalyzed cyclization of 2-isocyanobiphenyls with arylsulfonyl chlorides under oxidant-free and transition-metal-free conditions. This transformation represents an efficient and attractive synthetic utilization of arylsulfonyl chlorides.
Lee Minah M Department of Materials Science and Engineering, KAIST Institute for NanoCentury, KAIST, Daejeon, 305-701, Republic of - - 2014
Core-shell plasmonic nanohybrids are synthesized through a simple, solution-based process utilizing mussel-inspired polydopamine (PDA). The multi-purpose PDA not only facilitates plasmonic metal formation, but also serves as a scaffold to incorporate photosensitizers around metal cores as well as an adhesive between nanohybrids and substrates. The resulting plasmonic assembly exhibits highly ...
Amaral Joice A T JA Department of Physiotherapy and Occupational Therapy, Faculty of Philosophy and Sciences, UNESP (Marília), SP, Brazil. - - 2014
Objectives: The effects of chronic music auditory stimulation on the cardiovascular system have been investigated in the literature. However, data regarding the acute effects of different styles of music on cardiac autonomic regulation are lacking. The literature has indicated that auditory stimulation with white noise above 50 dB induces cardiac ...
Wong Jen It - - 2014
We fabricated a single active layer quantum dots light emitting diode(QD-LED) device based on colloidal CdSe (core)/CdS (arm) tetrapods nanostructures capable of simultaneously producing room temperature electroluminesence (EL) peaks at two spectrally distinct wavelengths, namely at ~500 nm and at ~660 nm. This remarkable dual EL was found to originate ...
Pham Minh-Hao MH Department of Chemical Engineering, Centre en catalyse et chimie verte (C3V), Laval University, Quebec, G1V 0A6, Canada. - - 2014
A hollow Fe2O3-TiO2-PtOx photocatalyst for visible light H2 generation was prepared from nanosized MIL-88B consisting of coordinatively unsaturated metal centers as a hard template. This photocatalyst is composed of hybrid metal oxide-TiO2 with controllable wall thickness and two different cocatalysts that are separately located on two surface sides.
Gao Junkuo J School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore. - - 2014
Here, we report a new Ti(iv)-based porous metal-organic framework (MOF) (), which displayed strong absorption in the visible region with a bandgap of 1.72 eV. The electronic structure and bandgap were further investigated by DFT calculations. Photoelectrochemical studies indicated that is photoactive under visible light illumination (λ > 400 nm) ...
Turzhitsky Vladimir V Center for Advanced Biomedical Imaging fnd Photonics, Beth Israel Deaconess Medical Center, Harvard University, Boston, Massachusetts 02215 - - 2014
The biomedical uses for the spectroscopy of scattered light by micro and nanoscale objects can broadly be classified into two areas. The first, often called light scattering spectroscopy (LSS), deals with light scattered by dielectric particles, such as cellular and sub-cellular organelles, and is employed to measure their size or ...
Sundaram Vijay M - - 2014
Light scattering from nonspherically symmetric pure dielectric structures is examined. From the finite element full-wave analysis, it is found that teardrop-shaped scatterers can focus visible light to a ∼10  nm spot with an intensity enhancement ∼10<sup>5</sup> when the incident light is radially polarized.
Zhao Zhao Z State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences (CAS), Changchun, Jilin 130033, China. tanhq870@126.com - - 2014
Stable reduced TiO2 rutile nanorods with well-defined facets were prepared by a solvothermal route in the presence of Zn powder. The oxygen vacancy in the TiO2 nanorods, which can be tuned by the amount of Zn, results in a narrow band gap and visible-light photocatalytic activity.
Yu Lijuan L College of Chemistry and Molecular Science, Wuhan University, Wuhan 430072, P. R. China. typeng@whu.edu.cn - - 2014
Zinc phthalocyanine (ZnPc) derivatives with asymmetric (Zn-tri-PcNc-2) or symmetric (Zn-tetrad-Nc) structure, which possess wide spectral response in the visible/near-IR light region, are synthesized and utilized as a sensitizer of graphitic carbon nitride (g-C3N4) with 0.5 wt% Pt-loading for photocatalytic H2 production. The experimental results indicate that Zn-tri-PcNc-2 exhibits much better ...
Mahajan Namit N Theoretical Physics Division, Physical Research Laboratory, Navrangpura, Ahmedabad 380 009, - - 2014
We consider one-loop QCD corrections and renormalization group running of the neutrinoless double-βdecay amplitude focusing on the short-range part of the amplitude (without the light neutrino exchange) and find that these corrections can be sizeable. Depending on the operator under consideration, there can be moderate to large cancellations or significant ...
1 2 3 4 5 6 7 8 9 10 >