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https://www.readbyqxmd.com/read/28743156/components-of-mesophyll-resistance-and-their-environmental-responses-a-theoretical-modeling-analysis
#1
Yi Xiao, Xin-Guang Zhu
Mesophyll resistance (rm ), together with stomatal resistance and biochemical limitations, are recognized as three critical factors limiting leaf photosynthesis. Contrary to the expectation of being a constant, rm not only varies with light and CO2 conditions but also shows different responses among species. To elucidate the mechanistic basis of these responses, we derived an analytical model of rm , which incorporates various anatomical and biochemical factors including permeabilities of cell wall and chloroplast envelope to CO2 and HCO3(-) , carbonic anhydrase activities in cytosol and stroma, Rubisco activities, and relative location of mitochondria and chloroplast...
July 25, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28743131/the-spatial-extent-of-epiretinal-electrical-stimulation-in-the-healthy-mouse-retina
#2
Zohreh Hosseinazdeh, Archana Jalligampala, Eberhart Zrenner, Daniel Lleweylln Rathbun
BACKGROUND/AIMS: Retinal prostheses use electrical stimulation to restore functional vision to patients blinded by retinitis pigmentosa. A key detail is the spatial pattern of ganglion cells activated by stimulation. Therefore, we characterized the spatial extent of network-mediated electrical activation of retinal ganglion cells (RGCs) in the epiretinal monopolar electrode configuration. METHODS: Healthy mouse RGC activities were recorded with a micro-electrode array (MEA)...
July 26, 2017: Neuro-Signals
https://www.readbyqxmd.com/read/28742992/utilizing-secondary-agricultural-education-programs-to-deliver-evidence-based-grain-safety-training-for-young-and-beginning-workers
#3
Yuan-Hsin Cheng, William E Field, Roger L Tormoehlen, Brian F French
Purdue University's Agricultural Safety and Health Program (PUASHP) has collaborated with secondary agricultural education programs, including FFA Chapters, for over 70 years to deliver and promote agricultural safety and health programming. With support from a U.S. Department of Labor Susan Harwood Program grant, PUASHP utilized a Developing a Curriculum (DACUM) process to develop, implement, and evaluate an evidence-based curriculum for use with young and beginning workers, ages 16-20, exposed to hazards associated with grain storage and handling...
July 25, 2017: Journal of Agromedicine
https://www.readbyqxmd.com/read/28742611/a-rare-presentation-of-a-morel-lavallee-lesion-of-the-lower-leg-successfully-treated-with-ultrasound-guided-aspiration
#4
Audrey Falconi, Holly Crellin, Chelsea Tagawa
A Morel-Lavallee lesion (MLL) is a relatively rare condition that is caused by a traumatic shearing force. This force leads to a closed degloving injury of the subcutaneous tissue and fascia that creates a potential space that can fill with lymph, blood, and necrotic fat. The MLLs are traditionally seen after high impact trauma and typically located at the greater trochanter and pelvis, although recent reports have found them to be located at the knee, thigh, and lower leg. The MLLs typically present as swelling at the site of injury, which can be difficult to differentiate from several other diagnoses...
July 21, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28742496/experience-dependent-shaping-of-hippocampal-ca1-intracellular-activity-in-novel-and-familiar-environments
#5
Jeremy D Cohen, Mark Bolstad, Albert K Lee
The hippocampus is critical for producing stable representations of familiar spaces. How these representations arise is poorly understood, largely because changes to hippocampal inputs have not been measured during spatial learning. Here, using intracellular recording, we monitored inputs and plasticity-inducing complex spikes (CSs) in CA1 neurons while mice explored novel and familiar virtual environments. Inputs driving place field spiking increased in amplitude - often suddenly - during novel environment exploration...
July 25, 2017: ELife
https://www.readbyqxmd.com/read/28742479/understanding-and-combating-resistance-to-online-learning
#6
John Vivolo
Resistance to change is an easy thing for human beings to understand. It is at the heart of our desire to find comfort with the familiar such as family, friends and our homes. We create homes that are designed a certain way and usually are slow to change. We make friends for years and keep those memories etched in stone, even though time and age create a romanticised version of the past. Change scares us so much that we reflect on our past, the old days, with such reverence that we paint over the ugly parts...
December 1, 2016: Science Progress
https://www.readbyqxmd.com/read/28742367/long-lived-direct-and-indirect-interlayer-excitons-in-van-der-waals-heterostructures
#7
Bastian Miller, Alexander Steinhoff, Borja Pano, Julian Klein, Frank Jahnke, Alexander Holleitner, Ursula Wurstbauer
We report the observation of a doublet structure in the low-temperature photoluminescence of interlayer excitons in heterostructures consisting of monolayer MoSe2 and WSe2. Both peaks exhibit long photoluminescence lifetimes of several ten nanoseconds up to 100 ns verifying the interlayer nature of the excitons. The energy and linewidth of both peaks show unusual temperature and power dependences. While the low-energy peak dominates the spectra at low power and low temperatures, the high-energy peak dominates for high power and temperature...
July 25, 2017: Nano Letters
https://www.readbyqxmd.com/read/28742340/structure-and-electrical-transport-relations-in-ba-zr-pr-o3-%C3%AE-perovskites
#8
Isabel Antunes, Ulises Amador, Adriana Alves, Maria Rosário Correia, Clemens Ritter, Jorge Ribeiro Frade, Domingo Pérez-Coll, Glenn C Mather, Duncan Paul Fagg
Members of the perovskite solid solution BaZr1-xPrxO3-δ (0.2 ≤ x ≤ 0.8) with potential high-temperature electrochemical applications were synthesized via mechanical activation and high-temperature annealing at 1250 °C. Structural properties were examined by Rietveld analysis of neutron powder diffraction and Raman spectroscopy at room temperature, indicating rhombohedral symmetry (space group R3̅c) for members x = 0.2 and 0.4 and orthorhombic symmetry (Imma) for x = 0.6 and 0.8. The sequence of phase transitions for the complete solid solution from BaZrO3 to BaPrO3 is Pm3̅m → R3̅c → Imma → Pnma...
July 25, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28742319/petal-like-mos2-nanosheets-space-confined-in-hollow-mesoporous-carbon-spheres-for-enhanced-lithium-storage-performance
#9
Xiue Zhang, Rongfang Zhao, Qianhui Wu, Wenlong Li, Chao Shen, Lubin Ni, Hui Yan, Guowang Diao, Ming Chen
An innovative approach for efficient synthesis of petal-like molybdenum disulfide nanosheets inside hollow mesoporous carbon spheres (HMCSs), the yolk-shell structured MoS2@C, has been developed. HMCSs effectively control and confine in situ growth of MoS2 nanosheets and significantly improve the conductivity and structural stability of the hybrid material. The yolk-shell structured MoS2@C is proved to achieve high reversible capacity (993 mA h g-1 at 1 A g-1 after 200 cycles), superior rate capability (595 mA h g-1 at a current density of 10 A g-1) and excellent cycle performance (962 mA h g-1 at 1 A g-1 after 1000 cycles and 624 mA h g-1 at 5 A g-1 after 400 cycles) when evaluated as an anode material for lithium-ion batteries...
July 25, 2017: ACS Nano
https://www.readbyqxmd.com/read/28742100/a-multifactor-approach-to-forecasting-romanian-gross-domestic-product-gdp-in-the-short-run
#10
Daniel Armeanu, Jean Vasile Andrei, Leonard Lache, Mirela Panait
The purpose of this paper is to investigate the application of a generalized dynamic factor model (GDFM) based on dynamic principal components analysis to forecasting short-term economic growth in Romania. We have used a generalized principal components approach to estimate a dynamic model based on a dataset comprising 86 economic and non-economic variables that are linked to economic output. The model exploits the dynamic correlations between these variables and uses three common components that account for roughly 72% of the information contained in the original space...
2017: PloS One
https://www.readbyqxmd.com/read/28742095/statistical-process-control-applied-to-mechanized-peanut-sowing-as-a-function-of-soil-texture
#11
Cristiano Zerbato, Carlos Eduardo Angeli Furlani, Antonio Tassio Santana Ormond, Lucas Augusto da Silva Gírio, Franciele Morlin Carneiro, Rouverson Pereira da Silva
The successful establishment of agricultural crops depends on sowing quality, machinery performance, soil type and conditions, among other factors. This study evaluates the operational quality of mechanized peanut sowing in three soil types (sand, silt, and clay) with variable moisture contents. The experiment was conducted in three locations in the state of São Paulo, Brazil. The track-sampling scheme was used for 80 sampling locations of each soil type. Descriptive statistics and statistical process control (SPC) were used to evaluate the quality indicators of mechanized peanut sowing...
2017: PloS One
https://www.readbyqxmd.com/read/28742064/the-effect-of-biosilver-nanoparticles-on-different-bacterial-strains-metabolism-reflected-in-their-vocs-profiles
#12
Boguslaw Buszewski, Ileana Andreea Ratiu, Maciej Milanowski, Pawel Pomastowski, Tomasz Ligor
Silver nanoparticles use has spawned during the last years a growing interest for many researchers, due to their bacteriostatic and bactericidal properties and synergetic effects, when they are used together with antibiotics, for an increased efficiency and less adverse reactions in treatment of bacterial infections. GC-MS (gas chromatography coupled with mass spectrometry), which is considered "the golden standard" in chemical analysis has proven to be a reliable instrument, perfectly suitable for clinical analysis...
July 25, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/28742060/suppressed-kondo-effect-and-kosterlitz-thouless-type-phase-transition-induced-by-level-difference-in-a-triple-dot-device
#13
Yong-Chen Xiong, Hai-Ming Huang, Wen-Lei Zhao, Amel Laref
Quantum dot system provides an ideal platform for quantum information processing, within which to demonstrate the quantum states is one of the most important issue for quantum simulation and quantum computation. In this paper, we report a peculiar electron state in a parallel triple dot device where the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction is invalid when the level differences of the dots sweep into appropriate regime. This extraordinary tendency then results in an antiferromagnetic spin coupling between two of the dots and may lead to zero or full conductance, relying deeply on the relation of the two level spacings...
July 25, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28742059/spanning-the-scales-of-mechanical-metamaterials-using-time-domain-simulations-in-transformed-crystals-graphene-flakes-and-structured-soils
#14
Ronald Aznavourian, Tania Michelle Guenneau-Puvirajesinghe, Stephane Brule, Stefan Enoch, Sebastien Roger Guenneau
We begin with a brief historical survey of discoveries of quasi-crystals and graphene, and then introduce the concept of transformation crystallography, which consists of the application of geometric transforms to periodic structures. We consider motifs with three-fold, four-fold and six-fold symmetries according to the crystallographic restriction theorem. Furthermore, we define motifs with five-fold symmetry such as quasi-crystals generated by a cut-and-projection method from periodic structures in higher-dimensional space...
July 25, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28742046/a-fast-algorithm-for-analysis-of-molecular-communication-in-artificial-synapse
#15
Bilgesu A Bilgin, Ozgur B Akan
In this paper we analyse molecular communications (MC) in a proposed artificial synapse (AS), whose main difference from biological synapses (BSs) is that it is closed, i.e., transmitter molecules cannot diffuse out from AS. Such a setup has both advantages and disadvantages. Besides higher structural stability, being closed, AS never runs out of transmitters. Thus, MC in AS is disconnected from outer environment, which is very desirable for possible intra-body applications. On the other hand, clearance of transmitters from AS has to be achieved by transporter molecules on the presynaptic membrane of AS...
July 21, 2017: IEEE Transactions on Nanobioscience
https://www.readbyqxmd.com/read/28742037/temporal-coherence-based-deblurring-using-non-uniform-motion-optimization
#16
Congbin Qiao, Rynson W H Lau, Bin Sheng, Benxuan Zhang, Enhua Wu
Non-uniform motion blur due to object movement or camera jitter is a common phenomenon in videos. However, state-of-the-art video deblurring methods used to deal with this problem can introduce artifacts, and may sometimes fail to handle motion blur due to the movements of the object or the camera. In this paper, we propose a non-uniform motion model to deblur video frames. The proposed method is based on superpixel matching in the video sequence to reconstruct sharp frames from blurry ones. To identify a suitable sharp superpixel to replace a blurry one, we enrich the search space with a non-uniform motion blur kernel, and use a generalized PatchMatch algorithm to handle rotation, scale, and blur differences in the matching step...
July 24, 2017: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
https://www.readbyqxmd.com/read/28741934/mixed-spin-diamond-chain-cu2fepo4f4-h2o-4-with-a-noncollinear-spin-order-and-possible-successive-phase-transitions
#17
Hongcheng Lu, Naoaki Hayashi, Yuki Matsumoto, Hiroshi Takatsu, Hiroshi Kageyama
A diamond spin chain system, one of the one-dimensional frustrated lattices, is known to exhibit novel properties, but experimental studies have been exclusively confined to materials with a single spin component. Here, we report on the synthesis, structure, and magnetic properties of a new diamond chain compound Cu2FePO4F4(H2O)4 1 composed of mixed-spins of Cu(2+) (S = 1/2 × 2) and Fe(3+) (S = 5/2). Compound 1 crystallizes in the space group C2/c of the monoclinic crystal system with a = 7.7546(4) Å, b = 12...
July 25, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28741869/increased-baseline-runx2-caspase-3-and-p21-gene-expressions-in-the-peripheral-blood-of-disease-modifying-anti-rheumatic-drug-na%C3%A3-ve-rheumatoid-arthritis-patients-are-associated-with-improved-clinical-response-to-methotrexate-therapy
#18
Elena V Tchetina, Natalia V Demidova, Galina A Markova, Elena A Taskina, Svetlana I Glukhova, Dmitry E Karateev
OBJECTIVE: To investigate the potential of the baseline gene expression in the whole blood of disease-modifying anti-rheumatic drug-naïve rheumatoid arthritis (RA) patients for predicting the response to methotrexate (MTX) treatment. METHODS: Twenty-six control subjects and 40 RA patients were examined. Clinical, immunological and radiographic parameters were assessed before and after 24 months of follow-up. The gene expressions in the whole blood were measured using real-time reverse transcription polymerase chain reaction...
July 25, 2017: International Journal of Rheumatic Diseases
https://www.readbyqxmd.com/read/28741594/polar-phase-transitions-in-heteroepitaxial-stabilized-la-sub-0-5-sub-y-sub-0-5-sub-alo-sub-3-sub-thin-films
#19
Shenghua Liu, Chunfeng Zhang, Mengya Zhu, Qian He, Jak Chakhalian, Xiaoran Liu, Albina Borisevich, Xiaoyong Wang, Min Xiao
We report on the fabrication of epitaxial La0.5Y0.5AlO3 ultrathin films on (001) LaAlO3 substrates. Structural characterizations by scanning transmission electron microscopy and X-ray diffraction confirm the high quality of the film with AlO6 octahedral tilt pattern. Unlike either of the nonpolar parent compound, LaAlO3 and YAlO3, second harmonic generation measurements on the thin films suggest a nonpolar - polar phase transition at Tc near 500 K, and a polar - polar phase transition at Ta near 160 K. By fitting the angular dependence of the second harmonic intensities, we further propose that the two polar structures can be assigned to the Pmc21 and Pmn21 space group, while the high temperature nonpolar structure belongs to the Pbnm space group...
July 25, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28741435/effect-of-ankle-position-and-noninvasive-distraction-on-arthroscopic-accessibility-of-the-distal-tibial-plafond
#20
Craig C Akoh, Kevin Dibbern, Annuziato Amendola, Tinnart Sittapairoj, Donald D Anderson, Phinit Phisitkul
BACKGROUND: Osteochondral lesions of the tibial plafond (OLTPs) can lead to chronic ankle pain and disability. It is not known how limited ankle motion or joint distraction affects arthroscopic accessibility of these lesions. The purpose of this study was to determine the effects of different fixed flexion angles and distraction on accessibility of the distal tibial articular surface during anterior and posterior arthroscopy. METHODS: Fourteen below-knee cadaver specimens underwent anterior and posterior ankle arthroscopy using a 30-degree 2...
July 1, 2017: Foot & Ankle International
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