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https://www.readbyqxmd.com/read/28222576/may-a-unitary-autonomic-index-help-assess-autonomic-cardiac-regulation-in-elite-athletes-preliminary-observations-on-the-national-italian-olympic-committee-team
#1
Roberto Sala, Mara Malacarne, Fabio Tosi, Manuela Benzi, Nadia Solaro, Stefano Tamorri, Antonio Spataro, Massimo Pagani, Daniela Lucini
BACKGROUND: Long term endurance training, as occurring in elite athletes, is associated to cardiac neural remodeling in favor of cardioprotective vagal mechanisms, resulting in resting bradycardia and augmented contribution of cardiac parasympathetic nerve activity. Autonomic assessment can be performed by way of Heart Rate Variability. This technique however provides multiple indices, and there is not yet complete agreement on their specific significance. Purpose of the study was to assess whether a rank transformation and radar plot could provide a unitary autonomic index, capable to show a correlation between intensity of individual work and quality of autonomic regulation...
February 21, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28222408/severe-osteoporosis-with-multiple-spontaneous-vertebral-fractures-in-a-young-male-carrying-triple-polymorphisms-in-the-vitamin-d-receptor-collagen-type-1-and-low-density-lipoprotein-receptor-related-peptide-5-genes
#2
Maria P Yavropoulou, Panagoulia Kollia, Dimitris Chatzidimitriou, Stavroula Samara, Lemonia Skoura, John G Yovos
: Osteoporosis is a common disease with a strong genetic component. Several studies have reported the vitamin D receptor (VDR), collagen type I (COL1A1), and LDL receptor-related protein 5 (LRP5) genes as the most likely candidates. However, most of the studies have been carried out in postmenopausal women and older men and show inconsistent results. CASE PRESENTATION: We report a case of a 26-year old male who presented with severe back pain of acute onset, unrelated to any kind of trauma, and diffuse myalgia...
October 2016: Hormones: International Journal of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28222361/biological-and-catalytic-applications-of-green-synthesized-fluorescent-n-doped-carbon-dots-using-hylocereus-undatus
#3
Velusamy Arul, Thomas Nesakumar Jebakumar Immanuel Edison, Yong Rok Lee, Mathur Gopalakrishnan Sethuraman
In this work, a simple hydrothermal route for the synthesis of fluorescent nitrogen doped carbon dots (N-CDs) is reported. The Hylocereus undatus (H. undatus) extract and aqueous ammonia are used as carbon and nitrogen source, respectively. The optical properties of synthesized N-CDs are analyzed using UV-Visible (UV-Vis) and fluorescence spectroscopy. The surface morphology, elemental composition, crystallinity and functional groups present in the N-CDs are examined using high resolution transmission electron microscopy (HR-TEM) with energy dispersive spectroscopy (EDS), selected area electron diffraction (SAED), X-ray diffraction (XRD) and Fourier transform infrared (FT-IR) spectroscopy, respectively...
February 13, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28221764/correlation-of-bandgap-reduction-with-inversion-response-in-si-gesn-high-k-metal-stacks
#4
Christian Schulte-Braucks, Keyvan Narimani, Stefan Glass, Nils von den Driesch, Jean-Michel Hartmann, Zoran Ikonic, Valeri V Afanas'ev, Qing-Tai Zhao, Siegfried Mantl, Dan Buca
The bandgap tunability of (Si)GeSn group IV semiconductors opens a new era in Si-technology. Depending on the Si/Sn contents, direct and indirect bandgaps in the range of 0.4 eV to 0.8 eV can be obtained, offering a broad spectrum of both photonic and low power electronic applications. In this work, we systematically studied capacitance-voltage characteristics of high-k/metal gate stacks formed on GeSn and SiGeSn alloys with Sn-contents ranging from 0 to 14 at.% and Si-contents from 0 to 10 at.% particularly focusing on the minority carrier inversion response...
February 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28221387/one-step-in-situ-synthesis-of-core-shell-structured-cr2o3-p-fibrous-phosphorus-hybrid-composites-with-highly-efficient-full-spectrum-response-photocatalytic-activities
#5
Hongpeng Zhou, Shixin Xu, Dingke Zhang, Shijian Chen, Junkai Deng
Making full use of solar energy and achieving high charge separation efficiency are critical factors for the photocatalysis technique. In this work, we report core-shell structured fibrous phosphorus (f-P) coated P-doped Cr2O3 (Cr2O3:P@f-P) hybrid composites with a strong optical absorption in the full region of 200-2600 nm. The Cr2O3:P@f-P hybrid composites exhibit a record photocatalytic efficiency under UV, visible and near-infrared light irradiation, demonstrating as promising photocatalysts for the full utilization of solar energy...
February 21, 2017: Nanoscale
https://www.readbyqxmd.com/read/28221018/low-efficiency-upconversion-nanoparticles-for-high-resolution-coalignment-of-near-infrared-and-visible-light-paths-on-a-light-microscope
#6
Sriramkumar Sundaramoorthy, Adrian Garcia Badaracco, Sophia M Hirsch, Jun Hong Park, Tim Davies, Julien Dumont, Mimi Shirasu-Hiza, Andrew C Kummel, Julie C Canman
The combination of near-infrared (NIR) and visible wavelengths in light microscopy for biological studies is increasingly common. For example, many fields of biology are developing the use of NIR for optogenetics, in which an NIR laser induces a change in gene expression and/or protein function. One major technical barrier in working with both NIR and visible light on an optical microscope is obtaining their precise coalignment at the imaging plane position. Photon upconverting particles (UCPs) can bridge this gap as they are excited by NIR light but emit in the visible range via an anti-Stokes luminescence mechanism...
February 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28220847/atomic-layer-confined-vacancies-for-atomic-level-insights-into-carbon-dioxide-electroreduction
#7
Shan Gao, Zhongti Sun, Wei Liu, Xingchen Jiao, Xiaolong Zu, Qitao Hu, Yongfu Sun, Tao Yao, Wenhua Zhang, Shiqiang Wei, Yi Xie
The role of oxygen vacancies in carbon dioxide electroreduction remains somewhat unclear. Here we construct a model of oxygen vacancies confined in atomic layer, taking the synthetic oxygen-deficient cobalt oxide single-unit-cell layers as an example. Density functional theory calculations demonstrate the main defect is the oxygen(II) vacancy, while X-ray absorption fine structure spectroscopy reveals their distinct oxygen vacancy concentrations. Proton transfer is theoretically/experimentally demonstrated to be a rate-limiting step, while energy calculations unveil that the presence of oxygen(II) vacancies lower the rate-limiting activation barrier from 0...
February 21, 2017: Nature Communications
https://www.readbyqxmd.com/read/28220699/quantum-mechanical-study-on-the-catalytic-mechanism-of-alkaline-phosphatases
#8
Gabriela L Borosky
Alkaline phosphatases (APs) catalyze the hydrolysis and transphosphorylation of phosphate monoesters. The catalytic mechanism was examined by quantum-mechanical calculations using an active-site model based on the X-ray crystal structure of the human placental AP. Free energies of activation and of reaction for the catalytic steps were evaluated for a series of aryl and alkyl phosphate esters, and the computational results were compared with experimental values available in the literature. Mechanistic observations previously reported in experimental works were rationalized by the present theoretical study, particularly regarding the difference in the rate-determining step between aryl and alkyl phosphates...
February 21, 2017: Journal of Chemical Information and Modeling
https://www.readbyqxmd.com/read/28219586/factors-associated-with-the-development-of-sarcopenia-in-kidney-transplant-recipients
#9
M Yanishi, Y Kimura, H Tsukaguchi, Y Koito, H Taniguchi, T Mishima, Y Fukushima, M Sugi, H Kinoshita, T Matsuda
INTRODUCTION: Sarcopenia is characterized by an involuntary loss of skeletal muscle mass, strength, and function. Previous studies suggest that it is generally associated with aging and chronic kidney diseases. The focus of this study was on the association between sarcopenia and pre-sarcopenia in kidney transplant recipients. METHODS: Fifty-one patients who underwent kidney transplantation at Kansai Medical University Hospital were enrolled, and their sarcopenia status was evaluated between April and July 2016...
March 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28219078/mechanical-metamaterials-at-the-theoretical-limit-of-isotropic-elastic-stiffness
#10
J B Berger, H N G Wadley, R M McMeeking
A wide variety of high-performance applications require materials for which shape control is maintained under substantial stress, and that have minimal density. Bio-inspired hexagonal and square honeycomb structures and lattice materials based on repeating unit cells composed of webs or trusses, when made from materials of high elastic stiffness and low density, represent some of the lightest, stiffest and strongest materials available today. Recent advances in 3D printing and automated assembly have enabled such complicated material geometries to be fabricated at low (and declining) cost...
February 20, 2017: Nature
https://www.readbyqxmd.com/read/28218894/corrected-kondo-temperature-beyond-the-conventional-kondo-scaling-limit
#11
ZhenHua Li, Jianhua Wei, Xiao Zheng, YiJing Yan, Hong-Gang Luo
In the Kondo systems like the magnetic impurity screened by theconduction electrons in a metal host as well as the quantum dots connected by the leads, the low energy behaviors have universal dependence on the T/T<sup>0</sup><sub>K</sub> or eV/k<sub>B</sub>T<sub>K</sub><sup>0</sup>, where T<sub>K</sub><sup>0</sup> is the conventional Kondo temperature. However, it was shown that this scaling behavior is only valid at low-energy, called the Kondo scaling limit...
February 20, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28218844/tuning-the-homo-lumo-energy-gap-of-small-diamondoids-using-inverse-molecular-design
#12
Jos L Teunissen, Frank De Proft, Freija De Vleeschouwer
Functionalized diamondoids show great potential as building blocks for various new optoelectronic applications. However, until now, only simple mono- and double substitutions were investigated. In this work, we considered up to 10 and 6 sites for functionalization of the two smallest diamondoids, adamantane and diamantane, respectively, in search for diamondoid derivatives with a minimal and a maximal HOMO-LUMO energy gap. To this end, the energy gap was optimized systematically using an inverse molecular design methodology based on the best-first-search algorithm combined with a Monte Carlo component to escape local optima...
February 20, 2017: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/28218530/ultrafast-excited-state-dynamics-in-a-molecular-motors-coupling-of-motor-length-to-medium-viscosity
#13
Jamie Conyard, Peter Stacko, Jiawen Chen, Sophie McDonagh, Christopher R Hall, Sergey P Laptenok, Wesley R Browne, Ben L Feringa, Stephen R Meech
Photochemically driven molecular motors convert the energy of incident radiation to intramolecular rotational motion. The motor molecules considered here execute four step unidirectional rotational motion. This comprises a pair of successive light induced isomerizations to a metastable state followed by thermal helix inversions. The internal rotation of a large molecular unit required in these steps is expected to be sensitive to both the viscosity of the medium and the volume of the rotating unit. In this work we describe a study of motor motion in both ground and excited states as a function of the size of the rotating units...
February 20, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28218508/control-of-surface-and-edge-oxidation-on-phosphorene
#14
Kaci L Kuntz, Rebekah A Wells, Jun Hu, Teng Yang, Baojuan Dong, Huaihong Guo, Adam H Woomer, Daniel L Druffel, Anginelle Alabanza, David Tomanek, Scott C Warren
Phosphorene is emerging as an important two-dimensional semiconductor, but controlling the surface chemistry of phosphorene remains a significant challenge. Here we show that controlled oxidation of phosphorene determines the composition and spatial distribution of the resulting oxide. We used X-ray photoemission spectroscopy to measure the binding energy shifts that accompany oxidation. We interpreted these spectra by calculating the binding energy shift for 24 likely bonding configurations, including phosphorus oxides and hydroxides located on the basal surface or edges of flakes...
February 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28218271/beads-milling-of-waste-si-sawdust-into-high-performance-nanoflakes-for-lithium-ion-batteries
#15
Takatoshi Kasukabe, Hirotomo Nishihara, Katsuya Kimura, Taketoshi Matsumoto, Hikaru Kobayashi, Makoto Okai, Takashi Kyotani
Nowadays, ca. 176,640 tons/year of silicon (Si) (>4N) is manufactured for Si wafers used for semiconductor industry. The production of the highly pure Si wafers inevitably includes very high-temperature steps at 1400-2000 °C, which is energy-consuming and environmentally unfriendly. Inefficiently, ca. 45-55% of such costly Si is lost simply as sawdust in the cutting process. In this work, we develop a cost-effective way to recycle Si sawdust as a high-performance anode material for lithium-ion batteries...
February 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28217718/pediatric-perioperative-stress-responses-and-anesthesia
#16
Koichi Yuki, Erika Matsunami, Kazumasa Tazawa, Wei Wang, James A DiNardo, Sophia Koutsogiannaki
Surgical stress responses cause an array of endocrinological, metabolic and immunological changes in patients. The landmark studies in the 1980s showed that adequate anesthesia dramatically improved the outcomes of pediatric surgical patients by attenuating stress hormonal responses, pointing out the harm of 'inadequate' anesthesia. Subsequent studies questioned the role of administering very high-dose anesthetics to further attenuate stress responses. Here we review the feature of surgical stress responses in pediatric patients including their difference from those in adult patients...
2017: Translational Perioperative and Pain Medicine
https://www.readbyqxmd.com/read/28215553/organization-of-rescue-behaviour-sequences-in-ants-cataglyphis-cursor-reflects-goal-directedness-plasticity-and-memory
#17
Thierry Duhoo, Jean-Luc Durand, Karen L Hollis, Elise Nowbahari
The experimental study of rescue behaviour in ants, behaviour in which individuals help entrapped nestmates in distress, has revealed that rescuers respond to victims with very precisely targeted behaviour. In Cataglyphis cursor, several different components of rescue behaviour have been observed, demonstrating the complexity of this behaviour, including sand digging and sand transport to excavate the victim, followed by pulling on the victim's limbs as well as the object holding the victim in place, behaviour that serves to free the victim...
February 12, 2017: Behavioural Processes
https://www.readbyqxmd.com/read/28214932/theoretical-and-experimental-study-of-polycyclic-aromatic-compounds-as-%C3%AE-tubulin-inhibitors
#18
Fabian E Olazarán, Carlos A García-Pérez, Debasish Bandyopadhyay, Isaias Balderas-Rentería, Angel D Reyes-Figueroa, Lars Henschke, Gildardo Rivera
In this work, through a docking analysis of compounds from the ZINC chemical library on human β-tubulin using high performance computer cluster, we report new polycyclic aromatic compounds that bind with high energy on the colchicine binding site of β-tubulin, suggesting three new key amino acids. However, molecular dynamic analysis showed low stability in the interaction between ligand and receptor. Results were confirmed experimentally in in vitro and in vivo models that suggest that molecular dynamics simulation is the best option to find new potential β-tubulin inhibitors...
March 2017: Journal of Molecular Modeling
https://www.readbyqxmd.com/read/28214683/neutron-measurements-in-radiotherapy-a-method-to-correct-neutron-sensitive-devices-for-parasitic-photon-response
#19
L Irazola, J A Terrón, R Bedogni, A Pola, M Lorenzoli, E Jimenez-Ortega, A R Barbeiro, B Sánchez-Nieto, F Sánchez-Doblado
One of the major causes of secondary malignancies after radiotherapy treatments are peripheral doses, known to increase for some newer techniques (such as IMRT or VMAT). For accelerators operating above 10MV, neutrons can represent important contribution to peripheral doses. This neutron contamination can be measured using different passive or active techniques, available in the literature. As far as active (or direct-reading) procedures are concerned, a major issue is represented by their parasitic photon sensitivity, which can significantly affect the measurement when the point of test is located near to the field-edge...
February 12, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/28214677/photo-degradation-of-basic-green-1-and-basic-red-46-dyes-in-their-binary-solution-by-la2o3-al2o3nanocomposite-using-first-order-derivative-spectra-and-experimental-design-methodology
#20
Bahareh Fahimirad, Alireza Asghari, Maryam Rajabi
In this work, the lanthanum oxide-aluminum oxide (La2O3-Al2O3) nanocomposite is introduced as an efficient photocatalyst for the photo-degradation of the dyes basic green 1 (BG1) and basic red 46 (BR46) in their binary aqueous solution under the UV light irradiation. The properties of this catalyst are determined by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), Brunauer-Emmett-Teller (BET), and UV-visible spectrophotometry. The first-order derivative spectra are used for the simultaneous analysis of the dyes in their binary solution...
February 10, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
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