Read by QxMD icon Read

Light trap

Masanori Tsujimoto, Yukiko Enomoto, Masafumi Miyai, Yusuke Egashira, Toru Iwama
Purpose To determine the best platelet function test for in-stent tissue protrusion following carotid artery stenting (CAS). Methods Patients who underwent CAS were recruited prospectively in this observational study. Combination of aspirin 100 mg/day and clopidogrel 75 mg/day was administered for a minimum of 7 days prior to procedure. Platelet aggregation was measured by light transmittance aggregometry (LTA) following stimulation by adenosine diphosphate (ADP), collagen, and thrombin receptor activating peptide (TRAP) and by the point of care assay, VerifyNow which measures aspirin and thienopyridine reaction units...
January 1, 2018: Journal of International Medical Research
Zhili Wan, Yingen Sun, Lulu Ma, Feibai Zhou, Jian Guo, Song-Qing Hu, Xiao-Quan Yang
Nanofibrils from self-assembly of the naturally occurring saponin glycyrrhizic acid (GA) can be used to create an oil-in-water emulsion foam with long-term stability. Through a homogenization and aeration followed by a rapid cooling, stable emulsion foams can be produced from the mixtures of sunflower oil and saponin nanofibrils. At high temperature, the GA fibrils form a multilayer assembly at the interface, creating an interfacial fibrillar network to stabilize the oil droplets and air bubbles generated during homogenization...
March 16, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
Julie Rivière, Yann Le Strat, Pascal Hendrikx, Barbara Dufour
Bovine tuberculosis (bTB) is a common disease of cattle and wildlife, with economic repercussions and implications for animal and human health. The surveillance of bTB in wildlife is particularly important, to shed light on the epidemiological role of wild species and for the adaptation of control measures. In France, a bTB surveillance system for free-ranging wildlife, the Sylvatub system, was launched in 2011 on wild boars, red deer, roe deer and badgers. It relies on active and passive surveillance activities, constrained by practical difficulties, such as the accessibility of wild animals, and regulatory rules for the trapping of badgers, for example...
2018: PloS One
Amado M Velázquez-Benítez, K Yanín Guerra-Santillán, Raúl Caudillo-Viurquez, J Enrique Antonio-López, Rodrigo Amezcua-Correa, Juan Hernández-Cordero
We demonstrate a simple approach based on a photonic lantern spatial-mode multiplexer and a few-mode fiber for optical and manipulation of multiple microspheres. Selective generation of linearly polarized (LP) fiber modes provides light patterns useful for trapping one or multiple microparticles. Furthermore, rotation of the particles can be achieved by switching between degenerate LP modes, as well as through polarization rotation of the input light. Our results show that emerging fiber optic devices such as photonic lanterns can provide a versatile and compact means for developing optical fiber traps...
March 15, 2018: Optics Letters
K N Jarvis, J A Devlin, T E Wall, B E Sauer, M R Tarbutt
We present the properties and advantages of a new magneto-optical trap (MOT) where blue-detuned light drives "type-II" transitions that have dark ground states. Using ^{87}Rb, we reach a radiation-pressure-limited density exceeding 10^{11}  cm^{-3} and a temperature below 30  μK. The phase-space density is higher than in normal atomic MOTs and a million times higher than comparable red-detuned type-II MOTs, making the blue-detuned MOT particularly attractive for molecular MOTs, which rely on type-II transitions...
February 23, 2018: Physical Review Letters
Y Wang, S Subhankar, P Bienias, M Łącki, T-C Tsui, M A Baranov, A V Gorshkov, P Zoller, J V Porto, S L Rolston
We report on the experimental realization of a conservative optical lattice for cold atoms with a subwavelength spatial structure. The potential is based on the nonlinear optical response of three-level atoms in laser-dressed dark states, which is not constrained by the diffraction limit of the light generating the potential. The lattice consists of a one-dimensional array of ultranarrow barriers with widths less than 10 nm, well below the wavelength of the lattice light, physically realizing a Kronig-Penney potential...
February 23, 2018: Physical Review Letters
Tarick J El-Baba, Daniel R Fuller, Daniel W Woodall, Shannon A Raab, Christopher R Conant, Jonathan M Dilger, Yoni Toker, Evan R Williams, David H Russell, David E Clemmer
Ubiquitin confined within nanodroplets was irradiated with a variable-power CO2 laser. Mass spectrometry analysis shows evidence for a protein "melting"-like transition within droplets prior to solvent evaporation and ion formation. Ion mobility spectrometry reveals that structures associated with early steps of denaturation are trapped because of short droplet lifetimes.
March 14, 2018: Chemical Communications: Chem Comm
Takako Suzuki, Yukio Nakamura, Hiroyuki Kato
Introduction: The aim of this 18-month retrospective study was to evaluate the differences in outcomes of denosumab with tumor necrosis factor (TNF) inhibitors (TNFis), tocilizumab (TCZ), or abatacept (ABT) treatment in osteoporosis (OP) patients with rheumatoid arthritis (RA). Patients and methods: Patients were divided into TNFis-treated (TNF group; 44 cases), TCZ-treated (TCZ group; 8 cases), or ABT-treated (ABT group; 14 cases) groups. We measured serum bone-specific alkaline phosphatase (BAP) and tartrate-resistant acid phosphatase 5b (TRACP-5b) at baseline and every 3 months for 18 months and assessed bone mineral density (BMD) of the lumbar 1-4 vertebrae (L-BMD) and total hip BMD (H-BMD) at baseline and every 6 months for 18 months...
2018: Therapeutics and Clinical Risk Management
Erica Cristina da Silva Chagas, Arineia Soares Silva, Nelson Ferreira Fé, Lucas Silva Ferreira, Vanderson de Souza Sampaio, Wagner Cosme Morhy Terrazas, Jorge Augusto Oliveira Guerra, Rodrigo Augusto Ferreira de Souza, Henrique Silveira, Maria das Graças Vale Barbosa Guerra
BACKGROUND: Phlebotomine sand flies (Diptera: Psychodidae) are vectors of Leishmania species, the etiological agents of leishmaniasis, which is one of the most important emerging infectious diseases in the Americas. In the state of Amazonas in Brazil, anthropogenic activities encourage the presence of these insects around rural homes. The present study aimed to describe the composition and distribution of sand fly species diversity among the ecotopes (intradomicile, peridomicile and forest) in an area of American cutaneous leishmaniasis transmission and detect natural infection with Leishmania DNA to evaluate which vectors are inside houses and whether the presence of possible vectors represents a hazard of transmission...
March 13, 2018: Parasites & Vectors
Mostafa Ramadhan Dokhan, Kaouther Jaouadi, Sadok Salem, Osama Zenbil, Jean Paul Gonzalez, Afif Ben Salah, Badreddin Bashir Annajar
Cutaneous leishmaniasis (CL) is a public health concern caused by Leishmania ( L. ) major and ( L. ) tropica in Libya. Information on sandfly vectors, as well as their associated Leishmania species, is of paramount importance because vector dispersion is one of the major factors responsible for pathogen dissemination. A number of 515 sandflies (275 males and 240 females) were collected during June-November 2012 using the CDC miniature light traps from Al Rabta, northwest of Libya. Two hundred and forty unfed females were identified; Phlebotomus ( Ph...
March 12, 2018: American Journal of Tropical Medicine and Hygiene
Manuel Elías-Gutiérrez, Martha Valdez-Moreno, Janet Topan, Monica R Young, José Angel Cohuo-Colli
Currently, freshwater zooplankton sampling and identification methodologies have remained virtually unchanged since they were first established in the beginning of the XX century. One major contributing factor to this slow progress is the limited success of modern genetic methodologies, such as DNA barcoding, in several of the main groups. This study demonstrates improved protocols which enable the rapid assessment of most animal taxa inhabiting any freshwater system by combining the use of light traps, careful fixation at low temperatures using ethanol, and zooplankton-specific primers...
March 2018: Ecology and Evolution
Yuki Kawachiya, Shunsuke Murai, Motoharu Saito, Hiroyuki Sakamoto, Koji Fujita, Katsuhisa Tanaka
A periodic array of plasmonic nanocylinders can sustain both surface plasmon polaritons (SPPs) and optical diffraction in the plane of the array. Thus the optical energy can be efficiently trapped in the plane of the array, providing a good platform for controlling light. Plasmonic arrays have been investigated in the visible range, while studies in the ultraviolet (UV) range have been limited due to material-related restrictions and higher precision required for optical diffraction in the UV compared to that in the visible range...
March 5, 2018: Optics Express
Shuailong Zhang, Adele Nikitina, Yujie Chen, Yanfeng Zhang, Lin Liu, Andrew G Flood, Joan Juvert, M Dean Chamberlain, Nazir P Kherani, Steven L Neale, Aaron R Wheeler
Optoelectronic tweezers (OET) are a microsystem actuation technology capable of moving microparticles at mm s-1 velocities with nN forces. In this work, we analyze the behavior of particles manipulated by negative dielectrophoresis (DEP) forces in an OET trap. A user-friendly computer interface was developed to generate a circular rotating light pattern to control the movement of the particles, allowing their force profiles to be conveniently measured. Three-dimensional simulations were carried out to clarify the experimental results, and the DEP forces acting on the particles were simulated by integrating the Maxwell stress tensor...
March 5, 2018: Optics Express
Octavio Menocal, Paul E Kendra, Wayne S Montgomery, Jonathan H Crane, Daniel Carrillo
Ambrosia beetles have emerged as significant pests of avocado ((Persea americana Mill. [Laurales: Lauraceae])) due to their association with pathogenic fungal symbionts, most notably Raffaelea lauricola T.C. Harr., Fraedrich & Aghayeva (Ophiostomatales: Ophiostomataceae), the causal agent of the laurel wilt (LW) disease. We evaluated the interaction of ambrosia beetles with host avocado trees by documenting their flight height and daily flight periodicity in Florida orchards with LW. Flight height was assessed passively in three avocado orchards by using ladder-like arrays of unbaited sticky traps arranged at three levels (low: 0-2 m; middle: 2-4 m; high: 4-6 m)...
March 8, 2018: Journal of Economic Entomology
Ashish Kumar, Christian Schuerings, Suneel Kumar, Ajay Kumar, Venkata Krishnan
A novel graphitic carbon nitride (g-C3 N4 )-CaTiO3 (CTCN) organic-inorganic heterojunction photocatalyst was synthesized by a facile mixing method, resulting in the deposition of CaTiO3 (CT) nanoflakes onto the surface of g-C3 N4 nanosheets. The photocatalytic activity of the as-synthesized heterojunction (along with the controls) was evaluated by studying the degradation of an aqueous solution of rhodamine B (RhB) under UV, visible and natural sunlight irradiation. The CTCN heterojunction with 1:1 ratio of g-C3 N4 /CT showed the highest photocatalytic activity under sunlight irradiation and was also demonstrated to be effective for the degradation of a colorless, non-photosensitizing pollutant, bisphenol A (BPA)...
2018: Beilstein Journal of Nanotechnology
Anna Gołąbiewska, Marta Paszkiewicz-Gawron, Aleksandra Sadzińska, Wojciech Lisowski, Ewelina Grabowska, Adriana Zaleska-Medynska, Justyna Łuczak
To investigate the effect of the ionic liquid (IL) chain length on the surface properties and photoactivity of TiO2 , a series of TiO2 microspheres have been synthesized via a solvothermal method assisted by 1-methyl-3-octadecylimidazolium chloride ([ODMIM][Cl]) and 1-methyl-3-tetradecylimidazolium chloride ([TDMIM][Cl]). All as-prepared samples were characterized by X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS), diffuse reflectance spectroscopy (DRS), scanning transmission microscopy (STEM) and the Brunauer-Emmett-Teller (BET) surface area method, whereas the photocatalytic activity was evaluated by the degradation of phenol in aqueous solution under visible light irradiation (λ > 420 nm)...
2018: Beilstein Journal of Nanotechnology
J J Wittmann, T V Can, M Eckardt, W Harneit, R G Griffin, B Corzilius
The electronic g factor carries highly useful information about the electronic structure of a paramagnetic species, such as spin-orbit coupling and dia- or paramagnetic (de-)shielding due to local fields of surrounding electron pairs. However, in many cases, a near "spin-only" case is observed, in particular for light elements, necessitating accurate and precise measurement of the g factors. Such measurement is typically impeded by a "chicken and egg situation": internal or external reference standards are used for relative comparison of electron paramagnetic resonance (EPR) Larmor frequencies...
March 6, 2018: Journal of Magnetic Resonance
Hua Sheng, Myoung Oh, Wojciech T Osowiecki, Wooyul Kim, A Paul Alivisatos, Heinz Frei
Monitoring of visible light sensitized reduction of CO2 at Cu nanoparticles in aqueous solution by rapid-scan ATR FT-IR spectroscopy on the time scale of seconds allowed structural identification of a one-electron intermediate and demonstrated its kinetic relevancy for the first time. Isotopic labelling (12C: 1632, 1358, 1346 cm-1; 13C: 1588, 1326, 1316 cm-1) revealed a species of carbon dioxide dimer radical anion structure, most likely bound to the catalyst surface through carbon. Intermediacy of Cu-C(=O)OCO2- surface species is in agreement with a recently proposed mechanism for eletrocatalytic CO2 reduction at Cu metal nanoparticles based on Tafel slope analysis...
March 9, 2018: Journal of the American Chemical Society
Yu Han, Qiang Li, Kai Wei Ng, Si Zhu, Kei May Lau
We report the growth of vertically stacked InGaAs/InP quantum wires on (001) Si substrates with adjustable room-temperature emission at telecom bands. Based on a self-limiting growth mode in selective area metal-organic chemical vapor deposition, crescent-shaped InGaAs quantum wires with variable dimensions are embedded within InP nano-ridges. With extensive transmission electron microscopy studies, the growth transition and morphology change from quantum wires to ridge quantum wells have been revealed. As a result, we are able to decouple the quantum wires from ridge quantum wells and manipulate their dimensions by scaling the growth time...
March 8, 2018: Nanotechnology
Taehyun Hwang, Byungho Lee, Jinhyun Kim, Sangheon Lee, Bumjin Gil, Alan Jiwan Yun, Byungwoo Park
Moving away from the high-performance achievements in organometal halide perovskite (OHP)-based optoelectronic and photovoltaic devices, intriguing features have been reported in that photocarriers and mobile ionic species within OHPs interact with light, electric fields, or a combination of both, which induces both spatial and temporal changes of optoelectronic properties in OHPs. Since it is revealed that the transport of photocarriers and the migration of ionic species are affected not only by each other but also by the inhomogeneous character, which is a consequence of the route selected to deposit OHPs, understanding the nanostructural evolution during OHP deposition, in terms of the resultant structural defects, electronic traps, and nanoscopic charge behaviors, will be valuable...
March 8, 2018: Advanced Materials
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"