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https://www.readbyqxmd.com/read/28091539/an-electromagnetic-modulator-based-on-electrically-controllable-metamaterial-analogue-to-electromagnetically-induced-transparency
#1
Yuancheng Fan, Tong Qiao, Fuli Zhang, Quanhong Fu, Jiajia Dong, Botao Kong, Hongqiang Li
Electromagnetically induced transparency (EIT) is a promising technology for the enhancement of light-matter interactions, and recent demonstrations of the EIT analogue realized in artificial micro-structured medium have remarkably reduced the extreme requirement for experimental observation of EIT spectrum. In this paper, we propose to electrically control the EIT-like spectrum in a metamaterial as an electromagnetic modulator. A diode acting as a tunable resistor is loaded in the gap of paired wires to inductively tune the magnetic resonance, which induces remarkable modulation on the EIT-like spectrum through the metamaterial sample...
January 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28078486/two-nadph-protochlorophyllide-oxidoreductase-por-isoforms-play-distinct-roles-in-environmental-adaptation-in-rice
#2
Choon-Tak Kwon, Suk-Hwan Kim, Giha Song, Dami Kim, Nam-Chon Paek
BACKGROUND: NADPH: protochlorophyllide oxidoreductase (POR) is an essential enzyme that catalyzes the photoreduction of protochlorophyllide to chlorophyllide, which is ultimately converted to chlorophyll in developing leaves. Rice has two POR isoforms, OsPORA and OsPORB. OsPORA is expressed in the dark during early leaf development; OsPORB is expressed throughout leaf development regardless of light conditions. The faded green leaf (fgl) is a loss-of-function osporB mutant that displays necrotic lesions and variegation in the leaves due to destabilized grana thylakoids, and has increased numbers of plastoglobules in the chloroplasts...
December 2017: Rice
https://www.readbyqxmd.com/read/28071711/transient-anhedonia-phenotype-and-altered-circadian-timing-of-behaviour-during-night-time-dim-light-exposure-in-per3-mice-but-not-wildtype-mice
#3
Bruno Jacson Martynhak, Alexandra L Hogben, Panos Zanos, Polymnia Georgiou, Roberto Andreatini, Ian Kitchen, Simon N Archer, Malcolm von Schantz, Alexis Bailey, Daan R van der Veen
Industrialisation greatly increased human night-time exposure to artificial light, which in animal models is a known cause of depressive phenotypes. Whilst many of these phenotypes are 'direct' effects of light on affect, an 'indirect' pathway via altered sleep-wake timing has been suggested. We have previously shown that the Period3 gene, which forms part of the biological clock, is associated with altered sleep-wake patterns in response to light. Here, we show that both wild-type and Per3(-/-) mice showed elevated levels of circulating corticosterone and increased hippocampal Bdnf expression after 3 weeks of exposure to dim light at night, but only mice deficient for the PERIOD3 protein (Per3(-/-)) exhibited a transient anhedonia-like phenotype, observed as reduced sucrose preference, in weeks 2-3 of dim light at night, whereas WT mice did not...
January 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28070454/marine-turtles-are-not-fussy-nesters-a-novel-test-of-small-scale-nest-site-selection-using-structure-from-motion-beach-terrain-information
#4
Ilana Kelly, Javier X Leon, Ben L Gilby, Andrew D Olds, Thomas A Schlacher
BACKGROUND: Nest selection is widely regarded as a key process determining the fitness of individuals and viability of animal populations. For marine turtles that nest on beaches, this is particularly pivotal as the nesting environment can significantly control reproductive success.The aim of this study was to identify the environmental attributes of beaches (i.e., morphology, vegetation, urbanisation) that may be associated with successful oviposition in green and loggerhead turtle nests...
2017: PeerJ
https://www.readbyqxmd.com/read/28069513/structure-and-mechanical-implications-of-the-pectoral-fin-skeleton-in-the-longnose-skate-chondrichthyes-batoidea
#5
Wei Huang, Watcharapong Hongjamrassilp, Jae-Young Jung, Philip A Hastings, Vlado A Lubarda, Joanna McKittrick
Animal propulsion systems are believed to show high energy and mechanical efficiency in assisting movement compared to artificial designs. As an example, batoid fishes have very light cartilaginous skeletons that facilitate their elegant swimming via enlarged wing-like pectoral fins. The aim of this work is to illustrate the hierarchical structure of the pectoral fin of a representative batoid, the Longnose Skate (Raja rhina), and explain the mechanical implications of its structural design. At the macro level, the pectoral fins are comprised of radially oriented fin rays, formed by staggered mineralized skeletal elements stacked end-to-end...
January 6, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28069225/sonochemical-assisted-hydrothermal-synthesis-of-pseudo-flower-shaped-bismuth-vanadate-bivo4-and-their-solar-driven-water-splitting-application
#6
Ibrahim Khan, Shahid Ali, Muhammad Mansha, Ahsanulhaq Qurashi
Bismuth vanadate (BiVO4) is a well-known photocatalyst due to its lower bandgap (Eg) and visible electromagnetic light absorption capacity. Herein, we reported the pulse ultra-sonochemical assisted hydrothermal approach to synthesize S-BiVO4. For the comparison purpose, H-BiVO4 is also synthesized via conventional hydrothermal approach. The surface morphology of S-BiVO4 through scanning electron microscope (SEM) indicates condensed microarrays (MAs) having pseudo-flower shapes. The energy dispersive X-rays (EDX) spectrum also confirmed the elemental percent composition of Bi, V and O in BiVO4...
May 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28067372/selective-turn-on-and-modulation-of-resonant-energy-transfer-in-single-plasmonic-hybrid-nanostructures
#7
Łukasz Bujak, Tatsuya Ishii, Dharmendar Kumar Sharma, Shuzo Hirata, Martin Vacha
Förster resonant energy transfer (FRET) is a nonradiative process by which the energy of light absorbed by a donor molecule is transferred to an acceptor molecule over a distance of several nanometers. FRET plays a crucial role in photosynthesis and nature-inspired artificial light-harvesting systems that are being explored for use in energy conversion applications. Localized plasmons of metal nanoparticles can potentially lead to a significant increase of FRET efficiency and effective donor-acceptor distance...
January 9, 2017: Nanoscale
https://www.readbyqxmd.com/read/28064478/automated-phase-mapping-with-agilefd-and-its-application-to-light-absorber-discovery-in-the-v-mn-nb-oxide-system
#8
Santosh K Suram, Yexiang Xue, Junwen Bai, Ronan Le Bras, Brendan Rappazzo, Richard Bernstein, Johan Bjorck, Lan Zhou, R Bruce van Dover, Carla P Gomes, John M Gregoire
Rapid construction of phase diagrams is a central tenet of combinatorial materials science with accelerated materials discovery efforts often hampered by challenges in interpreting combinatorial X-ray diffraction data sets, which we address by developing AgileFD, an artificial intelligence algorithm that enables rapid phase mapping from a combinatorial library of X-ray diffraction patterns. AgileFD models alloying-based peak shifting through a novel expansion of convolutional nonnegative matrix factorization, which not only improves the identification of constituent phases but also maps their concentration and lattice parameter as a function of composition...
January 9, 2017: ACS Combinatorial Science
https://www.readbyqxmd.com/read/28054011/data-for-the-size-of-cholesterol-fat-micelles-as-a-function-of-bile-salt-concentration-and-the-physico-chemical-properties-of-six-liquid-experimental-pine-derived-phytosterol-formulations-in-a-cholesterol-containing-artificial-intestine-fluid
#9
Jinsoo Yi, Tine A Knudsen, Anne-Louise Nielsen, Lars Duelund, Morten Christensen, Pablo Hervella, David Needham, Ole G Mouritsen
The data in this paper are additional information to the research article entiltled "Inhibition of cholesterol transport in an intestine cell model by pine-derived phytosterols" (Yi et al.,2016) [1]. The data derived from the measurement on six liquid formulations of commercial pine-derived phytosterol (CPP) by dynamic light scattering. The data cover micelle size and the zeta-potential for formulations with cholesterol including monoglyceride, oleic acid, and bile salt. The data demonstrate the critical effect of the bile salt concentration on the size of cholesterol-digested fat micelles...
February 2017: Data in Brief
https://www.readbyqxmd.com/read/28053610/evaluation-of-stability-and-biocompatibility-of-phema-pmma-keratoprosthesis-by-penetrating-keratoplasty-in-rabbits
#10
Yawon Hwang, Gonhyung Kim
Artificial corneas have been developed as an alternative to natural donor tissue to replace damaged or diseased corneas. This study was conducted to evaluate the stability and biocompatibility of PHEMA-PMMA [poly (2-hydroxyl methacrylate)-poly (methyl methacrylate)] keratoprostheses in rabbits following penetrating keratoplasty. Sixteen male New Zealand White rabbits aged 16 weeks were divided into three groups. Group I and group II contained six rabbits each, while the control group had four rabbits. Experimental surgery was conducted under general anesthesia...
December 2016: Laboratory Animal Research
https://www.readbyqxmd.com/read/28051852/artificial-slanted-nanocilia-array-as-a-mechanotransducer-for-controlling-cell-polarity
#11
Hong Nam Kim, Kyung-Jin Jang, Jung-Youn Shin, Daeshik Kang, Sang Moon Kim, Ilkyoo Koh, Yoonmi Hong, Segeun Jang, Min Sung Kim, Byung-Soo Kim, Hoon Eui Jeong, Noo Li Jeon, Pilnam Kim, Kahp-Yang Suh
We present a method to induce cell directional behavior using slanted nanocilia arrays. NIH-3T3 fibroblasts demonstrated bidirectional polarization in a rectangular arrangement on vertical nanocilia arrays and exhibited a transition from a bidirectional to a unidirectional polarization pattern when the angle of the nanocilia was decreased from 90° to 30°. The slanted nanocilia guided and facilitated spreading by allowing the cells to contact the sidewalls of the nanocilia, and the directional migration of the cells opposed the direction of the slant due to the anisotropic bending stiffness of the slanted nanocilia...
January 4, 2017: ACS Nano
https://www.readbyqxmd.com/read/28051843/enzyme-triggered-defined-protein-nanoarrays-efficient-light-harvesting-systems-to-mimic-chloroplasts
#12
Linlu Zhao, Haoyang Zou, Hao Zhang, Hongcheng Sun, Tingting Wang, Tiezheng Pan, Xiumei Li, Yushi Bai, Shanpeng Qiao, Quan Luo, Jiayun Xu, Chunxi Hou, Junqiu Liu
The elegance and efficiency by which chloroplasts harvest solar energy and conduct energy transfer have been a source of inspiration for chemists to mimic such process. However, precise manipulation to obtain orderly arranged antenna chromophores in constructing artificial chloroplast mimics was a great challenge, especially from the structural similarity and bioaffinity standpoints. Here we reported a design strategy that combined covalent and noncovalent interactions to prepare a protein-based light-harvesting system to mimic chloroplasts...
January 6, 2017: ACS Nano
https://www.readbyqxmd.com/read/28043386/initial-development-of-babesia-ovata-in-the-tick-midgut
#13
Hiroki Maeda, Takeshi Hatta, M Abdul Alim, Daigo Tsubokawa, Fusako Mikami, Kodai Kusakisako, Makoto Matsubayashi, Rika Umemiya-Shirafuji, Naotoshi Tsuji, Tetsuya Tanaka
The initial development of Babesia ovata in the midgut of the vector tick Haemaphysalis longicornis has been demonstrated through in vitro and in vivo studies. Although the research on the partial developmental cycles of B. ovata in the tick midgut was performed in our previous study by using ticks fed on experimentally B. ovata-infected cattle, detailed information on the developmental stages of B. ovata in H. longicornis was limited. This report describes the sequential development of stages of B. ovata in an in vitro study using B...
January 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28042103/critical-view-on-drug-dissolution-in-artificial-saliva-a-possible-use-of-in-line-e-tongue-measurements
#14
Maria Khaydukova, Dmitry Kirsanov, Miriam Pein-Hackelbusch, L Isabell Immohr, Venera Gilemkhanova, Andrey Legin
Proper monitoring of drug's dissolution is a prerequisite for assessing of taste masking efficacy of pharmaceuticals. Corresponding dissolution procedure is likely to be performed with water. Since the objective of these tests is to examine fate of a pharmaceutical formulation in oral cavity, this choice of solvent seems unsuitable because physical and chemical properties of human saliva are quite far from those of water. Obviously, dissolution profiles registered in water may differ significantly from what really happens with a drug in a mouth cavity...
December 29, 2016: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28040848/new-proof-of-concept-in-viral-inactivation-virucidal-efficacy-of-405%C3%A2-nm-light-against-feline-calicivirus-as-a-model-for-norovirus-decontamination
#15
Rachael M Tomb, Michelle Maclean, John E Coia, Elizabeth Graham, Michael McDonald, Chintamani D Atreya, Scott J MacGregor, John G Anderson
The requirement for novel decontamination technologies for use in hospitals is ever present. One such system uses 405 nm visible light to inactivate microorganisms via ROS-generated oxidative damage. Although effective for bacterial and fungal inactivation, little is known about the virucidal effects of 405 nm light. Norovirus (NoV) gastroenteritis outbreaks often occur in the clinical setting, and this study was designed to investigate potential inactivation effects of 405 nm light on the NoV surrogate, feline calicivirus (FCV)...
December 31, 2016: Food and Environmental Virology
https://www.readbyqxmd.com/read/28039831/oxidative-degradation-of-emerging-micropollutant-acesulfame-in-aqueous-matrices-by-uva-induced-h2o2-fe-2-and-s2o8-2-fe-2-processes
#16
Eneliis Kattel, Marina Trapido, Niina Dulova
In the present study, UVA/H2O2/Fe(2+) and UVA/S2O8(2-)/Fe(2+) processes were applied to degrade the artificial sweetener, acesulfame (ACE) in ultrapure water (UW), groundwater (GW), and secondary effluent (WW). The degradation time and mineralization of 75 μM of ACE determined the efficacy of the procedures. The results indicated that the UVA-induced H2O2/Fe(2+) and S2O8(2-)/Fe(2+) systems are a promising alternative for the removal of ACE from different aqueous matrices as both studied processes completely degraded the target compound at an ACE/oxidant/Fe(2+) molar ratio of 1/10/1 and pH 3...
December 22, 2016: Chemosphere
https://www.readbyqxmd.com/read/28032049/the-efficiency-of-child-formula-dentifrices-containing-different-calcium-and-phosphate-compounds-on-artificial-enamel-caries
#17
Praphasri Rirattanapong, Kadkao Vongsavan, Chavengkiat Saengsirinavin, Ploychompoo Khumsub
OBJECTIVES: Fluoride toothpaste has been extensively used to prevent dental caries. However, the risk of fluorosis is concerning, especially in young children. Calcium phosphate has been an effective remineralizing agent and is present in commercial dental products, with no risk of fluorosis to users. This in vitro study aimed to compare the effects of different calcium phosphate compounds and fluoride-containing dentifrices on artificial caries in primary teeth. MATERIALS AND METHODS: Fifty sound primary incisors were coated with nail varnish, leaving two 1 mm(2) windows on the labial surface before immersion in demineralizing solution for 96 hours to produce artificial enamel lesions...
November 2016: Journal of International Society of Preventive & Community Dentistry
https://www.readbyqxmd.com/read/28026086/identification-of-serum-protein-markers-for-early-diagnosis-of-pregnancy-in-buffalo
#18
Lukumoni Buragohain, Trilok Nanda, Arnab Ghosh, Mayukh Ghosh, Rajesh Kumar, Sunil Kumar, Sambhu Sharan Gupta, Arpita Bharali, Ashok K Mohanty, Inderjeet Singh, Ashok Kumar Balhara
Improper or delayed pregnancy diagnosis has significant impact over animal production, particularly in buffaloes which inherently suffer from several reproductive inefficiencies. Thus the present study has undertaken to identify serum protein markers pertaining to early pregnancy diagnosis in buffaloes. Serum samples were collected from 10 pregnant Murrah Buffalo heifers at weekly intervals from days 0-35 post-artificial insemination and from 12 inseminated non-pregnant cyclic buffalo heifers on days 0, 7, 14 and 21...
December 27, 2016: Animal Science Journal, Nihon Chikusan Gakkaihō
https://www.readbyqxmd.com/read/28024322/enhanced-luminescence-performance-of-quantum-wells-by-coupling-piezo-phototronic-with-plasmonic-effects
#19
Xin Huang, Chunyan Jiang, Chunhua Du, Liang Jing, Mengmeng Liu, Weiguo Hu, Zhong Lin Wang
With a promising prospect of light-emitting diodes as an attractive alternative to conventional light sources, remaining challenges still cannot be addressed owing to their limited efficiency. Among the continued scientific efforts, significant improvement on the emission efficiency has been achieved via either piezo-phototronic effect-based strain modulation or resonant excitation of plasmons in metallic nanostructures. Here, we present the investigation on the coupling process between piezo-phototronic effect and localized surface plasmonic resonance for enhancing the photoluminescence of InGaN/GaN quantum wells coated with Ag nanoparticles...
December 27, 2016: ACS Nano
https://www.readbyqxmd.com/read/28004911/plasmon-enhanced-photocatalytic-co2-conversion-within-metal-organic-frameworks-under-visible-light
#20
Kyung Min Choi, Dohyung Kim, Bunyarat Rungtaweevoranit, Christopher A Trickett, Jesika Trese Deniz Barmanbek, Ahmad S Alshammari, Peidong Yang, Omar M Yaghi
Materials development for artificial photosynthesis, in particular, CO2 reduction, has been under extensive efforts, ranging from inorganic semiconductors to molecular complexes. In this report, we demonstrate a metal-organic framework (MOF)-coated nanoparticle photocatalyst with enhanced CO2 reduction activity and stability, which stems from having two different functional units for activity enhancement and catalytic stability combined together as a single construct. Covalently attaching a CO2-to-CO conversion photocatalyst Re(I)(CO)3(BPYDC)Cl, BPYDC = 2,2'-bipyridine-5,5'-dicarboxylate, to a zirconium MOF, UiO-67 (Ren-MOF), prevents dimerization leading to deactivation...
December 22, 2016: Journal of the American Chemical Society
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