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Jimenez Angelica A a Department of Chemistry , Texas Southern University , Houston , Texas , - - 2014
Polycyclic aromatic hydrocarbons (PAHs) are suspected to be carcinogenic and mutagenic. This study describes the presence of PAHs in light, medium and dark roasted coffee including instant and decaffeinated brands. Total PAHs concentration was related to the degree of roasting with light roasted coffee showing the least and dark roasted ...
Montagnese Sara S Department of Medicine, University of Padova , Padova , Italy - - 2014
Circadian rhythmicity and non-visual sensitivity to light can be assessed, in healthy subjects, by measuring the rhythm of the urinary melatonin metabolite 6-sulphatoxymelatonin (aMT6s) and by determining the response of plasma melatonin to nocturnal retinal light exposure, respectively. However, the validity of these techniques has not been assessed in disease ...
Dessì Alessio A Dipartimento di Chimica "U. Schiff", Università degli Studi di Firenze, Via della Lastruccia 13, 50019 Sesto Fiorentino, - - 2014
Three new thiazolo[5,4-d]thiazole-based organic dyes have been designed and synthesized for employment as DSSC sensitizers. Alternation of the electron poor thiazolothiazole unit with two propylenedioxythiophene (ProDOT) groups ensured very intense light absorption in the visible region (ε up to 9.41 × 10(4) M(-1) cm(-1) in THF solution). The dyes were ...
Begg J J School of Applied Sciences and Health Innovations Research Institute, RMIT University, GPO Box 2476, Melbourne, VIC, 3001, Australia, - - 2014
Temporally varying light intensity during acquisition of projection images in an optical CT scanner can potentially be misinterpreted as physical properties of the sample. This work investigated the impact of LED light source intensity instability on measured attenuation coefficients. Different scenarios were investigated by conducting one or both of the ...
Henriksen Tone Eg TE Department of Clinical Medicine, Section for Psychiatry, Faculty of Medicine and Dentistry, University of Bergen, Bergen, Norway; Division of Mental Health Care, Valen Hospital, Fonna Local Health Authority, Norway and MoodNet Research Group, Bergen, Norway; Division of Psychiatry, Haukeland University Hospital, Bergen, - - 2014
Available pharmacological treatment of mania is insufficient. Virtual darkness therapy (blue light-blocking treatment by means of orange-tinted glasses) is a promising new treatment option for mania. The basis for this might be the recently identified blue light-sensitive retinal photoreceptor, which is solely responsible for light stimulus to the circadian master ...
Tang Man-Chung MC Department of Chemistry, The University of Hong Kong, Pokfulam Road (Hong Kong), Fax: +(852) 2857-1586, Tel: - - 2014
A novel isoquinoline-containing C^N^C ligand and its phosphorescent triphenylamine-based alkynylgold(III) dendrimers have been synthesized. These alkynylgold(III) dendrimers serve as phosphorescent dopants in the fabrication of efficient solution-processable organic light-emitting devices (OLEDs). The photophysical, electrochemical, and electroluminescence properties were studied. A saturated red emission with CIE coordinates of (0.64, 0.36) and ...
Ferrier-Pagès C C Centre Scientifique de Monaco, Monaco, Monaco, - - 2014
Gorgonians are one of the most important benthic components of tropical and temperate areas, and play a fundamental role as ecosystem engineers. Although global warming and pollution increasingly threaten them, the acquisition of nutrients, which is a key process in fitness and stress resistance, has been poorly investigated in such ...
Toshchevikov Vladimir Petrovich - - 2014
We study light-induced deformation of azobenzene elastomers which can display liquid-crystalline (LC) order. It is shown that photo-mechanical behavior of azobenzene elastomers is determined by the strength of the LC-interactions which is proportional to the density of rod-like azobenzene chromophores. At weak LC-interactions, a uniaxial order and uniaxial deformation of ...
Kuburas Adisa A Molecular Physiology and Biophysics, University of Iowa, 51 Newton Road, 5-431 BSB, Iowa City, IA, 52242, United - - 2014
Purpose. Mutations in the RGS9 gene cause the visual disorder bradyopsia that includes difficulty adapting to changes in light and photophobia. The purpose of this study was to determine whether lack of Rgs9 also causes photophobia-like behavior in Rgs9 knockout mice (Rgs9-/-) and to identify useful diagnostic measures of Rgs9 ...
Li Gang G Department of Chemistry and Biochemistry, Mount Allison University, Sackville, NB, E4L 1G7, Canada; Key Laboratory of Tropical Marine Bio-Resources and Ecology, South China Sea Institute of Oceanology, CAS, Guangzhou, 510301, - - 2014
With each cellular generation, oxygenic photoautotrophs must accumulate abundant protein complexes that mediate light capture, photosynthetic electron transport and carbon fixation. In addition to this net synthesis, oxygenic photoautotrophs must counter the light-dependent photoinactivation of Photosystem II (PSII), using metabolically expensive proteolysis, disassembly, resynthesis and re-assembly of protein subunits. We ...
Akhtar Javeed J Department of Physics, Polymers & Materials Synthesis (PMS) Lab, COMSATS, Institute of Information Technology, Park Road, Islamabad 44000, - - 2014
Ultra-small PbSe nanocrystals (NCs) were synthesized via a 'one-pot' approach in olive oil as the reaction medium and capping agent. The optical spectra showed discernible blue shifts in the absorption band edges (570-780 nm) due to strong quantum confinement effects and photoluminescence (PL) spectra showed significant strong emission peaks in ...
Xia Hua-Rong HR Key Laboratory for the Physics and Chemistry of Nanodevices, Peking University, Beijing 100871, China. wtaosun@pku.edu.cn - - 2014
CH3NH3PbI3 based photodetectors were fabricated by a facile low-cost process with much enhanced performance. The rise time changed from 2.7 s to 0.02 s, the decay time from 0.5 s to 0.02 s, and the ON/OFF ratio tripled with improved stability. The results indicate that perovskites are promising light-harvesting materials ...
Moon Young Min YM Department of Biological Sciences, Galvin Life Science Building and the Eck Institute for Global Health, University of Notre Dame, Notre Dame, IN 46556, - - 2014
The tropical disease vector mosquito Anopheles gambiae possesses 11 rhodopsin genes. Three of these, GPROP1, GPROP3, and GPROP4, encode rhodopsins with >99% sequence identity. We created antisera against these rhodopsins and used immunohistology to show that one or more of these rhodopsins are expressed in the major R1-6 photoreceptor class ...
Hu Bei B School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China. - - 2014
A highly efficient addition of alkyl α-bromocarboxylates to enamines by visible light-induced photoredox catalysis is reported. Compared with traditional methods, the reaction described here provided an alternative route for the construction of valuable γ-ketoesters in generally good yields.
Sanches Silveira Jéssica Eleonora Pedroso - - 2014
Abstract This article reviews current data about the relationship between sun radiation and skin, especially with regards ultraviolet light and the skin aging process. The benefits of sun exposition and the photoaging process are discussed. Finally, the authors present a review of photoprotection agents that are commercially available nowadays.
Meyer Andreas A Friedrich-Alexander-University of Erlangen-Nürnberg, Department of Chemistry and Pharmacy, Organic Chemistry Chair II, Henkestr. 42, 91054 Erlangen - - 2014
Known molecular, "caged" siRNAs are activated by UV light. Since the light of this type is toxic to cells, the uncaging can cause undesired side effects. A modular, molecular system for designing siRNAs is reported, which can be activated by non-toxic light in live cells. For example, siRNAs responsive to ...
Gaston Kevin J KJ Environment and Sustainability Institute, University of Exeter, Penryn, Cornwall, TR10 9FE, UK, - - 2014
Artificial light at night is profoundly altering natural light cycles, particularly as perceived by many organisms, over extensive areas of the globe. This alteration comprises the introduction of light at night at places and times at which it has not previously occurred, and with different spectral signatures. Given the long ...
Imada Kiyoshi K Department of Biological and Environmental Sciences, Faculty of Agriculture, Yamaguchi University, Yamaguchi, - - 2014
There is very little information on the fungistatic or fungicidal effect of visible light. This study investigated the effect of 405-nm light, generated by a light-emitting diode array, on the economically important fungus Botrytis cinerea. The mycelial growth of B. cinerea was inhibited to the greatest extent by light at ...
Cambras T T Departament de Fisiologia, Universitat de Barcelona , Barcelona , Spain - - 2014
Early light experience influences the brain during development. Perinatal light exposure has an important effect on the development of the circadian system, although the role of quantity versus quality of light in this process is still unclear. We tested the development of the circadian rhythm of locomotor activity under constant ...
Bachmeier Andreas A Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford , South Parks Road, Oxford OX1 3QR, Oxfordshire, United - - 2014
We present a photocathode assembly for the visible-light-driven selective reduction of CO2 to CO at potentials below the thermodynamic equilibrium in the dark. The photoelectrode comprises a porous p-type semiconducting NiO electrode modified with the visible-light-responsive organic dye P1 and the reversible CO2 cycling enzyme carbon monoxide dehydrogenase. The direct ...
Yuan Chunze - - 2014
The efficiency of most photovoltaic devices is severely limited by near-infrared (NIR) transmission losses. To alleviate this limitation, a new type of colloidal upconversion nanoparticles (UCNPs), hexagonal core/shell-structured β-NaYbF4:Er3+(2%)/NaYF4:Nd3+(30%), is developed and explored in this work as an NIR energy relay material for dye-sensitized solar cells (DSSCs). These UCNPs are ...
Florea Larisa L Insight Centre for Data Analytics, National Centre for Sensor Research, Dublin City University, Dublin, 9, - - 2014
The controlled movement of a chemical container by the light-activated expulsion of a chemical fuel, named here "photo-chemopropulsion", is an exciting new development in the array of mechanisms employed for controlling the movement of microvehicles, herein represented by lipid-based microdroplets. This "chemopropulsion" effect can be switched on and off, and ...
Hosseini Zahra Z Institute for Nanoscience and Nanotechnology, Sharif University of Technology, Tehran 14588 - - 2014
Luminescence downshifting (LDS) of light can be a practical photon management technique to compensate the narrow absorption band of high-extinction-coefficient dyes in dye-sensitized solar cells (DSSCs). Herein, an optical analysis on the loss mechanisms in a reflective LDS (R-LDS)/DSSC configuration is reported. For squaraine dye (550-700 nm absorption band) and CaAlSiN3 ...
Honza Marcel M Institute of Vertebrate Biology, AS CR, Květná 8, 603 65, Brno, Czech Republic, - - 2014
Certain light environments may hinder egg discrimination by hosts of foreign eggs, which could in some circumstances lead to the acceptance of non-mimetic eggs by hosts. We measured light parameters at red bishop (Euplectes orix) nests and used a model of avian visual processing to quantify the detectability of eggs ...
Conrad Karen S KS 0000000330482226 Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York, - - 2014
Three major classes of flavin photosensors, light oxygen voltage (LOV) domains, blue light sensor using FAD (BLUF) proteins and cryptochromes (CRYs), regulate diverse biological activities in response to blue light. Recent studies of structure, spectroscopy and chemical mechanism have provided unprecedented insight into how each family operates at the molecular ...
Rea Mark S MS Lighting Research Center, Rensselaer Polytechnic Institute , Troy, NY , - - 2014
Although circadian disruption is an accepted term, little has been done to develop methods to quantify the degree of disruption or entrainment individual organisms actually exhibit in the field. A variety of behavioral, physiological and hormonal responses vary in amplitude over a 24-h period and the degree to which these ...
Morin Lawrence P LP Department of Psychiatry, Stony Brook University, Stony Brook, NY, USA Graduate Program in Neuroscience, Stony Brook University, Stony Brook, NY, USA - - 2014
Brief exposure of mice to nocturnal light causes circadian rhythm phase shifts, simultaneously inducing locomotor suppression, a drop in body temperature, and associated sleep. The exact nature of the relationship between these light-induced responses is uncertain, although locomotor suppression and phase shift magnitudes are related to stimulus irradiance. Whether stimulus ...
Findlay Neil J NJ WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, Glasgow, G1 1XL, - - 2014
A novel BODIPY-containing organic small molecule is synthesized and employed as a down-converting layer on a commercial blue light-emitting diode (LED). The resulting hybrid device demonstrates white light emission under low-current operation, with color coordinates of (0.34, 0.31) and an efficacy of 13.6 lm/W; four times greater than the parent ...
Webb K F KF Royal Academy of Engineering Research Fellow, Institute of Biophysics, Imaging & Optical Science (IBIOS), School of Electrical and Electronic Engineering, The University of Nottingham, University Park, Nottingham, - - 2014
Phase contrast microscopy allows the study of highly transparent yet detail-rich specimens by producing intensity contrast from phase objects within the sample. Presented here is a generalized phase contrast illumination schema in which condenser optics are entirely abrogated, yielding a condenser-free yet highly effective method of obtaining phase contrast in ...
Kim Chang-Hee CH Department of Otorhinolaryngology-Head and Neck Surgery, Konkuk University Medical Center, Konkuk University School of Medicine, Seoul, South - - 2014
Though benign paroxysmal positional vertigo (BPPV) is the most common vestibular disorder causing positional vertigo, patients with typical positional vertigo in which the findings of positional nystagmus do not meet the diagnostic criteria for BPPV are often encountered in the clinic. Recently a concept of the light cupula was introduced, ...
Okello Robert C O RC Greenhouse Horticulture, Wageningen UR, PO Box 644, 6700, AP, Wageningen, The Netherlands; Horticulture and Product Physiology Group, Wageningen UR, PO Box 630, 6700, AP, Wageningen, The Netherlands; Centre for Crop Systems Analysis, Wageningen UR, PO Box 430, 6700, AK, Wageningen, The - - 2014
Light affects plant growth through assimilate availability and signals regulating development. Effects of light on tomato fruit growth were studied using cuvettes with light emitting diodes providing white, red or blue light to individual tomato trusses for different periods during the day. Hypotheses tested were: 1) light-grown fruits are stronger ...
Zhang Xiao - - 2014
As one of the most rapidly evolving branches of solid state lighting technologies, light emitting diodes (LEDs) are gradually replacing conventional lighting sources due to their advantages in energy saving and environmental protection. At the present time, commercially available white light emitting diodes (WLEDs) are predominantly phosphor based (e.g. a ...
Pfeffer Martina M Dr. Senckenbergische Anatomie, Institut für Anatomie II, Fachbereich Medizin, Goethe-Universität , Frankfurt/Main , Germany - - 2014
Behavior, physiological functions and cognitive performance change over the time of the day. These daily rhythms are either externally driven by rhythmic environmental cues such as the light/dark cycle (masking) or controlled by an internal circadian clock, the suprachiasmatic nucleus (SCN), which can be entrained to the light/dark cycle. Within ...
Yu Chunghyeon C Department of Bionanotechnology and Department of Applied Chemistry, Hanyang University, Republic of Korea. - - 2014
A visible light-induced process for selective difluoroalkylation of unactivated alkenes has been developed. The choice of base is crucial for governing the chemoselectivity of the process to produce difluoroalkylated alkanes and alkenes.
Lee Eunsu - - 2014
Iron oxide nanoparticles dispersed within a thermally responsive poly(N-isopropylacrylamide) (PNIPAm) hydrogel matrix effectively convert the photo energy of visible light of modest intensity into thermal energy, providing the efficient means to trigger changes in volumetric swelling of hydrogels. However, long irradiation time (on the order of minutes) and modest volume ...
Dixit Anand S AS Avian Environmental Endocrinology and Chronobiology Laboratory, Department of Zoology, North-Eastern Hill University, Shillong 793022, India. Electronic address: - - 2014
Experiments were performed on the subtropical population of male Eurasian tree sparrow (Passer montanus) to examine the mediation of the circadian rhythms in photoperiodic regulation of reproductive responses. In the first experiment, photosensitive sparrows were exposed to different resonance light dark cycles viz. 6L/6D, 6L/18D, 6L/30D, 6L/42D, 6L/54D and 6L/66D ...
Cohen Joanna E JE Institute for Global Tobacco Control, Department of Health, Behavior & Society, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD. Electronic address: - - 2014
This study assessed cessation and brand switching among smokers in Ontario, Canada after tobacco companies' voluntary removal of 'light' and 'mild' descriptors from cigarette packages. We analyzed longitudinal data on brand preference and cessation from a cohort of smokers (n=632) in the Ontario Tobacco Survey in Canada from 2006 to ...
Schirmer Aaron E AE Northeastern Illinois University, United States - - 2014
Many behaviors and physiological processes oscillate with daily, or circadian rhythms that are synchronized to environmental cues (e.g., light onset), but persist with periods of approximately 24 hours in the absence of such cues. We used a multilevel experimental approach to assess whether circadian rhythms modulate several aspects of the ...
Gomez Doris D CNRS MNHN, Brunoy, France; - - 2014
Many vertebrates use colour vision for vital behaviours. Yet, their visual performance in dim light is largely unknown. The light intensity threshold of colour vision is only known in humans, horses and two parrot species. Here, we first explore this threshold in a passerine bird, the blue tit (Cyanistes caeruleus). ...
Makki Rabih R Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA 02138-1204 (USA) - - 2014
It is well known that a large number of catalyst-carrying beads immersed in an oscillatory chemical medium (Belousov-Zhabotinsky reaction) display collective oscillatory behavior. Using a light sensitive version of BZ, we show that this collective behavior can be entrained to an external light source with an oscillatory intensity. Thus, the ...
Song Lu L Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory for Molecular Recognition and Function, Institute of Chemistry, the Chinese Academy of Sciences Beijing, 100190 - - 2014
We described herein a catalyst-free visible-light photolytic protocol for the imidation of arenes and heteroarenes. N-Bromosaccharin was identified as a viable and chemoselective nitrogen radical precursor that undergoes controllable homolytic cleavage under ambient light irradiation. The reaction can be applied to a number of arenes and heteroarenes with good chemo- ...
Li Kai K Department of Bioengineering and Biotechnology, Huaqiao University, Xiamen, - - 2014
In this paper, we reported for the first time that Rhodobacter azotoformans was capable of synthesizing a spectral variant of peripheral light-harvesting complex (LH3), besides a high light form (LH2), in response to low light intensity. Carotenoid components in these complexes were analyzed by absorption spectra, high-pressure liquid chromatography and ...
Fleetham Tyler T Department of Materials Science and Engineering, Arizona State University, Tempe, AZ, 85284, - - 2014
Efficient deep-blue-emitting tetradentate platinum complexes with a narrow spectral bandwidth are presented, which demonstrate CIEx ≈ 0.15 and CIEy < 0.1. Ultimately, an organic light-emitting diode (OLED) with 24.8% peak external quantum efficiency and CIE coordinates of (0.147, 0.079) is fabricated using PtON7-dtb.
Tang Bin B School of Textile Science and Engineering, Wuhan Textile University, Wuhan 430073, - - 2014
Silver nanoprisms were transformed into nanodecahedra through photoinduction of ultraviolet (UV) light in the presence of titanium dioxide (TiO2) quantum dots (QDs). Subsequently, the silver nanodecahedra were reconverted to silver nanoprisms under sodium lamp if there was sufficient citrate in the reaction system. The localized surface plasmon resonance (LSPR) optical ...
Liu Ying Y School of Material Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia, 30332-0245, - - 2014
Two-dimensional finite-element simulation of the piezo-phototronic effect in p-n-junction-based devices is carried out for the first time. A charge channel can be induced at the p-n junction interface when strain is applied, given the n-side is a piezoelectric semiconductor and the p-type side is non-piezoelectric semiconductor. This provides the first ...
Chang Zhi-Xian ZX The Key Laboratory for Special Functional Materials of MOE, Henan University, Kaifeng 475004, China. zhouwh@henu.edu.cn - - 2014
CZTS exhibited apparently phase-dependent photocatalytic H2 evolution under visible light. Possible factors for the phase-dependent photocatalytic activity of CZTS were discussed in detail.
Lara Francisco F *MSc †PhD Grupo de Ciencias de la Visión, Universidad de Murcia, Murcia, Spain (all authors); and Grupo de Investigación en Optometría, Universidad de Valencia, Valencia, Spain - - 2014
We evaluate the effect of pupil size on objectively measured amplitude of accommodation (AA). Pupil diameter and wavefront aberrometry were obtained in 15 eyes when stimulus swept across the range of clear vision in steps of 0.5 diopters. Wavefront refraction techniques were used to compute objective AA as the maximum ...
Eashwar M M a CSIR - Central Electrochemical Research Institute , Corrosion Research Centre , Mandapam Camp - 623519 , Tamil Nadu , - - 2014
The influence of sunlight of varying intensity on the performance of UNS S30400 stainless steel (SS) was explored under conditions of natural biofilm development in coastal seawater. In a series of tests performed outdoors under an opaque roof, a range of shades were fashioned to impart varied amounts of diurnal ...
Zhou Hongwei H Key Laboratory of Microgravity, Institute of Mechanics, Chinese Academy of Sciences, No.15 Beisihuanxi Road, Beijing 100190, People's Republic of China and National Microgravity Laboratory, Institute of Mechanics, Chinese Academy of Sciences, No.15 Beisihuanxi Road, Beijing 100190, People's Republic of - - 2014
Absolute coagulation rate constants were determined by independently, instead of simultaneously, using static and dynamic light scattering with the requested optical factors calculated by T-matrix method. The aggregating suspensions of latex particles with diameters of 500, 700, and 900 nm, that are all beyond validity limit of the traditional Rayleigh-Debye-Gans ...
Hirata Shuzo S Department of Organic and Polymeric Materials, Tokyo Institute of Technology, Meguro, Tokyo 152-8552, - - 2014
In materials showing reverse saturable absorption (RSA), the optical absorbance increases as the power of the light incident on them increases. To date, RSA has only been observed when very intense light sources, such as short-pulse lasers, are used. Here, we show that hydroxyl steroidal matrices embedding properly designed aromatic ...
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