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Palovaara Joakim J Centre for Ecology and Evolution in Microbial Model Systems, Linnaeus University, SE-39182 Kalmar, - - 2014
Proteorhodopsin (PR) is present in half of surface ocean bacterioplankton, where its light-driven proton pumping provides energy to cells. Indeed, PR promotes growth or survival in different bacteria. However, the metabolic pathways mediating the light responses remain unknown. We analyzed growth of the PR-containing Dokdonia sp. MED134 (where light-stimulated growth ...
Mitchell Madeline C MC University of - - 2014
In the model green alga Chlamydomonas reinhardtii, a carbon concentrating mechanism (CCM) is induced under low CO2 in the light and comprises: active inorganic carbon transport components, carbonic anhydrases and aggregation of Rubisco in the chloroplast pyrenoid. Previous studies have focused predominantly on asynchronous cultures of cells grown under low ...
Wang Jia J State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou, P. R. China. - - 2014
A hydrothermal precursor was first obtained by isopropyl titanate reacting with tetramethylammonium hydroxide (TMAOH), which acts as a source of nitrogen and carbon. A facile post-thermal treatment was employed to enhance the crystallinity and visible light photocatalytic activity of the as-prepared precursor. The resulting products of post-thermal treatment between 200 ...
McCully Curtis C Department of Physics and Astronomy, Rutgers, the State University of New Jersey, 136 Frelinghuysen Road, Piscataway, New Jersey 08854, - - 2014
Type Iax supernovae are stellar explosions that are spectroscopically similar to some type Ia supernovae at the time of maximum light emission, except with lower ejecta velocities. They are also distinguished by lower luminosities. At late times, their spectroscopic properties diverge from those of other supernovae, but their composition (dominated ...
Berger Hanna H Bielefeld University, Faculty of Biology, Center for Biotechnology (CeBiTec), Universitätsstrasse 27, 33615, Bielefeld, - - 2014
The unicellular green alga Chlamydomonas reinhardtii is capable of using organic and inorganic carbon sources simultaneously, which requires the adjustment of photosynthetic activity to the prevailing mode of carbon assimilation. We obtained novel insights into the regulation of light-harvesting at photosystem II (PSII) following altered carbon source availability. In C. ...
Kaschner Marco M Institut für Molekulare Enzymtechnologie, Heinrich-Heine-Universität Düsseldorf, Forschungszentrum Jülich, Wilhelm-Johnen Straße, D-52428 Jülich, - - 2014
In all photosynthetic organisms, chlorophylls function as light-absorbing photopigments allowing the efficient harvesting of light energy. Chlorophyll biosynthesis recurs in similar ways in anoxygenic phototrophic proteobacteria as well as oxygenic phototrophic cyanobacteria and plants. Here, the biocatalytic conversion of protochlorophyllide to chlorophyllide is catalyzed by evolutionary and structurally distinct protochlorophyllide ...
Madonia Paolo P a Istituto Nazionale di Geofisica e Vulcanologia , Sezione di Palermo , Palermo , - - 2014
We present the results of a re-analysis of a previously published carbon isotope data-set related to coralline sponges in the Caribbean Sea. The original interpretation led to the discrimination between a pre-industrial period, with a signal controlled by solar-induced climatic variations, followed by the industrial era, characterized by a progressive ...
Bai Yun-Jun YJ State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China; University of Chinese Academy of Sciences, Beijing, 100049, - - 2014
The Earth has undergone a significant climate switch from greenhouse to icehouse during the Plio-Pleistocene transition (PPT) around 2.7-2.4 million years ago (Ma), marked by the intensification of the Northern Hemisphere glaciation (NHG) ~2.7 Ma. Evidence based on oceanic CO2 ([CO2 ]aq ), supposed to be in close equilibrium with ...
Cheng Tianhai - - 2014
Light absorbing carbon aerosols play a substantial role in climate change through radiative forcing, which is the dominant absorber of solar radiation. Radiative properties of light absorbing carbon aerosols are strongly dependent on the morphological factors and the mixing mechanism of black carbon with other aerosol components. This study focuses ...
Niedermeyer Eva M EM Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125;Biodiversity and Climate Research Centre (BiK-F) and Senckenberg Gesellschaft für Naturforschung, D-60325 Frankfurt, Germany; - - 2014
The Indo-Pacific Warm Pool (IPWP) is a key site for the global hydrologic cycle, and modern observations indicate that both the Indian Ocean Zonal Mode (IOZM) and the El Niño Southern Oscillation exert strong influence on its regional hydrologic characteristics. Detailed insight into the natural range of IPWP dynamics and ...
Kabacińska Zuzanna Z Medical Physics Division, Faculty of Physics, Adam Mickiewicz University, Umultowska 85, Poznań 61-614, Poland - - 2014
This study is based on investigation of calcium carbonate powders with different grain sizes exposed to UV light. Calcium carbonate is widely used in many branches of industry, e.g. as a filler for polymer materials; therefore, knowing its properties, among them also its reaction to UV light, is essential. Samples ...
Sadanaga Yasuhiro Y Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, - - 2014
An instrument for measuring atmospheric nitrogen dioxide has been developed by a light-emitting diode induced fluorescence (LED-IF) technique. Air was introduced into a fluorescence detection cell. A pulsed blue light LED with a peak wavelength of 430 nm was irradiated to excite NO2 molecules in this cell. Fluorescence emitted from ...
Pihosh Yuriy Y Department of Applied Chemistry School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo, 113-8656, - - 2014
Nanostructured photoanodes based on well-separated and vertically oriented WO3 nanorods capped with extremely thin BiVO4 absorber layers are fabricated by the combination of Glancing Angle Deposition and normal physical sputtering techniques. The optimized WO3 -NRs/BiVO4 photoanode modified with Co-Pi oxygen evolution co-catalyst shows remarkably stable photocurrents of 3.2 and 5.1 ...
Tan Lling-Lling LL Low Carbon Economy (LCE) Group, Chemical Engineering Discipline, School of Engineering, Monash University, Jalan Lagoon Selatan, 46150 Bandar Sunway, Selangor, - - 2014
A facile and dopant-free strategy was employed to fabricate oxygen-rich TiO2 (O2-TiO2) with enhanced visible light photoactivity. Such properties were achieved by the in situ generation of oxygen through the thermal decomposition of the peroxo-titania complex. The O2-TiO2 photocatalyst exhibited high photoactivity towards CO2 reduction under visible light.
Jacobs Christopher B - - 2014
Fast-scan cyclic voltammetry (FSCV) can detect small changes in dopamine concentration, but the temporal resolution is typically limited to about 100 ms. Dopamine oxidation at carbon-fiber microelectrodes (CFME) is dependent on dopamine adsorption to the electrode surface and increasing the frequency of FSCV scan repetitions decreases the oxidation current because ...
Ammazzalorso Filippo F Department of Radiotherapy and Radiation Oncology, University of Marburg, Germany; Department of Medical Physics in Radiation Oncology, German Cancer Research Center (DKFZ), Heidelberg, Germany. Electronic address: - - 2014
Scanned-beam interplay with the intrafraction target motion may result in dose deterioration in particle therapy. The magnitude of this effect and the possibilities to mitigate it were investigated for carbon ion prostate treatments. For 12 prostate cases, 9 carbon ion treatment plans were prepared using 3 scanned-beam settings (spot sizes ...
Winkler Sandra - - 2014
We present a global analysis of CO2 emission reductions from the light-duty vehicle (LDV) fleet consistent with stabilization of atmospheric CO2 concentration at 450 ppm. The CO2 emission reductions are described by g CO2/km emission targets for average new light-duty vehicles on a tank-to-wheel basis between 2010 and 2050 that ...
Lee Seung Hee - - 2014
Photo-electrodes with tailored three-dimensional nanostructures offer a large enhancement in light harvesting capability for various optoelectronic devices enabled by strong light scattering in the nanostructures as well as improved charge transport. Here we present an array of three-dimensional titanium dioxide (TiO<sub>2</sub>) nanohelixes fabricated by the oblique angle deposition method as ...
Gao Peng P School of Civil & Environmental Engineering, Nanyang Technological University (Singapore), 50 Nanyang Avenue, 639798 (Singapore), Fax: - - 2014
Photocatalytic degradation of pollutants under visible light provides a new door to solve the water contamination problem by utilizing free and renewable sunlight. The search for highly efficient photocatalysts with hierarchical nanostructures remains crucial for accessing this new door. In this work, a new hierarchical nanostructured photocatalyst is designed and ...
Aykol Mehmet M Ming Hsieh Department of Electrical Engineering, †Department of Physics and Astronomy and ‡Department of Materials Science, University of Southern California , Los Angeles, California 90089, United - - 2014
We investigate the role of weak clamping forces, typically assumed to be infinite, in carbon nanotube mechanical resonators. Due to these forces, we observe a hysteretic clamping and unclamping of the nanotube device that results in a discrete drop in the mechanical resonance frequency on the order of 5-20 MHz, ...
Lea-Smith David J DJ University of - - 2014
Reducing excessive light harvesting in photosynthetic organisms may increase biomass yields by limiting photoinhibition and increasing light penetration in dense cultures. The cyanobacterium Synechocystis sp. PCC 6803 harvests light via the phycobilisome (PBS), which consists of an allophycocyanin core and six radiating rods, each with three phycocyanin (PC) discs. Via ...
Kromdijk Johannes J Institute for Genomic Biology, University of Illinois, 1206W Gregory drive, Urbana, IL 61801, - - 2014
Crop species with the C4 photosynthetic pathway are generally characterized by high productivity, especially in environmental conditions favouring photorespiration. In comparison with the ancestral C3 pathway, the biochemical and anatomical modifications of the C4 pathway allow spatial separation of primary carbon acquisition in mesophyll cells and subsequent assimilation in bundle-sheath ...
Babuskin Srinivasan S Centre for Biotechnology, Anna University, Chennai, 600 025, - - 2014
Biomass and lipid productivities of Isochrysis galbana were optimized using nutrients of molasses (4, 8, 12 g l(-1)), glucose (4, 8, 12 g l(-1)), glycerol (4, 8, 12 g l(-1)) and yeast extract (2 g l(-1)). Combinations of carbon sources at different ratios were evaluated in which the alga was grown at three different light intensities (50, 100 ...
Pu Maoping M Department of Organic Chemistry, Stockholm University , Arrhenius Laboratory, Stockholm 10691, - - 2014
The role of the intra- and intermolecular motion, i.e., molecular vibrations and the relative motion of reactants, remains largely unexplored in the frustrated Lewis acid/base chemistry. Here, we address the issue with the ab initio molecular dynamics (AIMD) study of CO2 binding by a Lewis acid (LA) and a Lewis ...
Huang Shu-Ping SP University of Haifa at Oranim, - - 2014
During discontinuous gas exchange cycles in insects, spiracular opening follows a typical prolonged period of spiracle closure. Gas exchange with the environment occurs mostly during the period of full spiracular opening. In this study we tested the hypothesis that recently reported ventilatory movements during the spiracle closure period serve to ...
Wargocki Pawel P International Centre for Indoor Environment and Energy (ICIEE), DTU Civil Engineering, Technical University of Denmark - - 2014
Carbon dioxide (CO2) sensors that provide a visual indication were installed in classrooms during normal school operation. During two-week periods, teachers and students were instructed to open the windows in response to the visual CO2 feedback in one week and open them, as they would normally do, without visual feedback, ...
Weyant Cheryl L - - 2014
Thirteen South Asian brick kilns were tested to quantify aerosol and gaseous pollutant emissions. Particulate matter (PM2.5), carbon monoxide (CO) and optical scattering and absorption measurements in the exhaust of six kiln technologies demonstrate differences in overall emission profiles and relative climate warming resulting from kiln design and fuel choice. ...
Sastre Francesc - - 2014
Ni supported on silica-alumina is an efficient and reusable photocatalyst for the reduction of CO2 by H2 to methane reaching selectivity above 95 % at CO2 conversions over 90 %. Although NiO behaves similarly, it undergoes a gradual deactivation upon reuse. The photocatalytic activity of Ni/silica-alumina under solar light derives ...
Shrestha Rijana R School of Earth and Environmental Sciences, Seoul National University, Seoul, 151-742, - - 2014
We investigated the contribution of volatile aerosols in light-absorption measurement by three filter-based optical instruments [aethalometer, continuous light-absorption photometer (CLAP), and continuous soot monitoring system (COSMOS)] at Gosan Climate Observatory (GCO) from February to June 2012. The aerosol absorption coefficient (σ abs) and the equivalent black carbon (BC) mass concentration ...
Andres Christine M CM Department of Chemical Engineering, University of Michigan , Ann Arbor, Michigan 48109, United - - 2014
Nature provides a vast array of solid materials that repeatedly and reversibly transform in shape in response to environmental variations. This property is essential, for example, for new energy-saving technologies, efficient collection of solar radiation, and thermal management. Here we report a similar shape-morphing mechanism using differential swelling of hydrophilic ...
Wang Lei L School of Pharmaceutical Sciences, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, 450001, P.R. China. - - 2014
Single-walled carbon nanotubes (SWNTs) possess unique physical and chemical properties, which make them very attractive for a wide range of applications. In particular, SWNTs and their composites have shown a great potential for photodynamic therapy (PDT). SWNTs have usually been used for photothermal therapy; herein, the photodynamic effect of two ...
Khasminskaya Svetlana S Institute of Nanotechnology, Karlsruhe Institute of Technology, 76021, Karlsruhe, - - 2014
We demonstrate how light from an electrically-driven carbon-nanotube can be coupled directly into a photonic waveguide architecture. Waferscale, broadband sources are realized integrated with nanophotonic circuits allowing for propagation of light over centimeter distances. Moreover, we show that the spectral properties of the emitter can be controlled directly on chip ...
Sathishkumar Panneerselvam P Advanced Ceramics and Nanotechnology Laboratory, Department of Materials Engineering, Faculty of Engineering, University of Concepcion, Concepcion 407-0409, Chile; Department of Chemistry, Periyar Maniammai University, Vallam, Thanjavur 613403, Tamil Nadu, India. Electronic address: - - 2014
An attempt has been made to render the visible light driven photocatalytic activity to the TiO2 nanocatalysts by loading 1 wt% of rare earth (RE) nanoclusters (Gd(3+), Nd(3+) and Y(3+)) using a low frequency (42kHz) producing commercial sonicator. The STEM-HAADF analysis confirms that the RE nanoclusters were residing at the ...
Polley Debanjan - - 2014
We investigate the shielding effectiveness and complex conductivity of single-walled carbon nanotubes (SWNT) distributed in a polyvinyl alcohol (PVA) matrix in the THz frequency range. SWNTs are dispersed in PVA matrices with varying SWNT content (keeping the thickness of SWNT/PVA film constant) using a slow-drying method, and terahertz time-domain spectroscopy ...
Velasco Leticia F LF Department of Chemical Processes in Energy and Environment, Instituto Nacional del Carbon (INCAR, CSIC), C/Francisco Pintado Fe 26, 33011 Oviedo - - 2014
By using monochromatic light the ability of semiconductor-free nanoporous carbons to convert the low-energy photons from the visible spectrum into chemical reactions (i.e. phenol photooxidation) is demonstrated. Data shows that the onset wavelength of the photochemical activity can be tuned by surface functionalization, with enhanced visible-light conversion upon introducing N-containing ...
Stalder Aurelien F AF Siemens AG, Healthcare Sector, Erlangen, - - 2014
Use repeated stress paradigms and an approach taken from neurological blood oxygen level dependent (BOLD) functional MRI (fMRI) to derive robust cardiac BOLD measurements. Multiple-repetition, single-shot, electrocardiograph-triggered, T2-prepared BOLD balanced steady-state free precession was performed during repeated long breath-holds in 13 volunteers. Nonrigid motion correction was applied to the continuously ...
Bian Juncao - - 2014
Photoelectrochemcial properties (PEC) of TiO2 nanorod arrays (TNRA) have been extensively investigated as they are photostable and cost effective. However, due to the wide band gap, only the UV part of solar light can be employed by TiO2. To enhance the photo-response of TNRA in the visible range, carbon dots ...
Mor Avishai A Weizmann Institute of - - 2014
The production of singlet oxygen is typically associated with inefficient dissipation of photosynthetic energy or can arise from light reactions due to accumulation of chlorophyll precursors as observed in flu-like mutants. Such photodynamic production of singlet oxygen is thought to be involved in stress signaling and programmed cell death. Here ...
Tirumani Srikanth S B-202, Department of Biological Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai, 400005, - - 2014
We have investigated transcript level changes of CO2-concentrating mechanism (CCM) genes during light-dark (12 h:12 h) cycles in synchronized Chlamydomonas reinhardtii at air-level CO2. CCM gene transcript levels vary at various times of light-dark cycles, even at same air-level CO2. Transcripts of inorganic carbon transporter genes (HLA3, LCI1, CCP1, CCP2 and LCIA) ...
Torop Janno J IMS Lab, Institute of Technology, University of Tartu , Nooruse 1, 50411 Tartu, - - 2014
Low-voltage stimuli-responsive actuators based on carbide-derived carbon (CDC) porous structures were demonstrated. Bending actuators showed a differential electromechanical response defined by the porosity of the CDC used in the electrode layer. Highly porous CDCs prepared from TiC (mainly microporous), B4C (micromesoporous), and Mo2C (mainly mesoporous) precursors were selected to demonstrate ...
Darias-González J G JG Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear (CEADEN), P.O.B. 6122, Miramar, La Habana, - - 2014
Submerged electric arc discharge in liquids has shown to be a promising method for synthesizing a wide variety of nanomaterials. However, it requires an accurate current stability control to ensure the desired purity and structure of the products. The discharge stability control through light emission has been previously studied, but ...
Vyas Anshul A - - 2014
Carbon nanotubes (CNTs) and carbon nanofibers (CNFs) are potential materials for high-performance electronic devices and circuits due to their light weight and excellent electrical properties such as high current capacity and tolerance to electromigration. In addition, at high frequencies, these materials exhibit transport behavior which holds special promise for applications ...
Lacey Emerson S ES Department of Entomology, University of California, Riverside CA 92506 - - 2014
In a wind-tunnel study, the upwind flight and source location of female Aedes aegypti to plumes of carbon dioxide (CO2) gas and odour from human feet is tested. Both odour sources are presented singly and in combination. Flight upwind along the plumes is evident for both CO2 and odour from ...
Wu Hongmin H Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. Electronic address: - - 2014
Carbon-modified titanium dioxide (TiO2) was prepared by a sol-gel method using tetrabutyl titanate as precursor, with calcination at various temperatures, and tested for the photocatalytic oxidation (PCO) of gaseous NH3 under visible and UV light. The test results showed that no samples had visible light activity, while the TiO2 calcined ...
Bunce James A JA Crop Systems and Global Change Laboratory, USDA-ARS, Beltsville, MD, USA. Electronic address: - - 2014
It has been suggested that the stimulation of soybean photosynthesis by elevated CO2 was less in free-air carbon dioxide enrichment (FACE) systems than in open top chambers (OTC), which might explain smaller yield increases at elevated CO2 in FACE systems. However, this has not been tested using the same cultivars ...
Hikosaka Kouki K Graduate School of Life Sciences, Tohoku University, Aoba, Sendai 980-8578, Japan; CREST, JST, Japan. - - 2014
Nitrogen distribution within a leaf canopy is an important determinant of canopy carbon gain. Previous theoretical studies have predicted that canopy photosynthesis is maximized when the amount of photosynthetic nitrogen is proportionally allocated to the absorbed light. However, most of such studies used a simple Beer's law for light extinction ...
Barth Johannes J University of Muenster, - - 2014
Light and oxygen are factors that are very much entangled in the reactive oxygen species (ROS) stress response network in plants, algae and cyanobacteria. The first obligatory step in understanding the ROS network is to separate these responses. In this study, a LC-MS/MS based quantitative proteomic approach was used to ...
Soto William W Department of Ecology, Evolution, & Behavior, University of Minnesota-Twin Cities, 100 Ecology Building, 1987 Upper Buford Circle, Saint Paul, MN, 55108, USA, - - 2014
Vibrio fischeri isolated from Euprymna scolopes (Cephalopoda: Sepiolidae) was used to create 24 lines that were serially passaged through the non-native host Euprymna tasmanica for 500 generations. These derived lines were characterized for biofilm formation, swarming motility, carbon source utilization, and in vitro bioluminescence. Phenotypic assays were compared between "ES" ...
Zhang Xiaobo X 1] Electrical Engineering and Computer Sciences, University of California, Berkeley, California 94720, USA [2] Berkeley Sensor and Actuator Center, University of California, Berkeley, California 94720, USA [3] Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, - - 2014
Direct conversion of light into mechanical work, known as the photomechanical effect, is an emerging field of research, largely driven by the development of novel molecular and polymeric material systems. However, the fundamental impediment is that the previously explored materials and structures do not simultaneously offer fast and wavelength-selective response, ...
Haas Andreas F AF Department of Biology, San Diego State University , United States ; Scripps Institution of Oceanography, University of California , San Diego , United - - 2014
While shifts from coral to seaweed dominance have become increasingly common on coral reefs and factors triggering these shifts successively identified, the primary mechanisms involved in coral-algae interactions remain unclear. Amongst various potential mechanisms, algal exudates can mediate increases in microbial activity, leading to localized hypoxic conditions which may cause ...
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