Results 31 to 40 of about 3,155,909 (302)

Mediating Effects of the COVID-19 Pandemic on the Associations between Physical Activity and Physical Fitness; Cross-Sectional Study among High School Adolescents

Journal of Functional Morphology and Kinesiology, 2023
The COVID-19 pandemic and the imposed social distancing measures caused negative changes in physical activity levels (PALs) and physical fitness (PF) among adolescents, but the potential mediating effect of the pandemic on the association between PAL and
Mirela Sunda, Barbara Gilic, Petra Rajkovic Vuletic, Vladimir Pavlinovic, Natasa Zenic   +4 more
doaj   +1 more source

Star Clusters in M31: Old Clusters with Bar Kinematics [PDF]

, 2010
We analyze our accurate kinematical data for the old clusters in the inner regions of M31. These velocities are based on high S/N Hectospec data (Caldwell et al 2010).
Barmby, Beasley, Beaton, Binney, Binney, Binney, Brinks, Bureau, Caldwell, Caldwell, Colucci, Lindblad, Olsen, Sarajedini, Stolte, Strader, Teuben, Trager, Walterbos   +18 more
core   +5 more sources

Design and Construction of Novel Frustrated Lewis Pairs Based on Modified Lewis Acid B(C₆F₅)₃

Crystals
This study aims to systematically investigate the influence of substituent effects on the strength of Lewis acid–base interactions in frustrated Lewis pairs (FLPs). Specifically, -C6F5 groups of the classical Lewis acid B(C6F5)3 are sequentially replaced
Quanwei Wang, Zonggui Li, Yanuo Cui, Jiashuo Zhang, Huilin Li, Wei Li   +5 more
doaj   +1 more source

Hyper-Cross-Linked Polystyrene as a Stabilizing Medium for Small Metal Clusters

Molecules, 2021
Among different polymers nanostructured cross-linked aromatics have the greatest potential as catalytic supports due to their exceptional thermal and chemical stability and preservation of the active phase morphology.
Alexey V. Bykov, Galina N. Demidenko, Linda Zh. Nikoshvili, Lioubov Kiwi-Minsker   +3 more
doaj   +1 more source

NH₃ Sensor Based on rGO-PANI Composite with Improved Sensitivity

Sensors, 2021
This work reports on a reduced graphene oxide and poly(aniline) composite (rGO-PANI), with rGO clusters inserted between PANI chains. These clusters were formed due the plasticizing effect of N-methyl-2-pyrrolidone (NMP) solvent, which was added during ...
Fabio Seiti Hadano, Anderson Emanuel Ximim Gavim, Josiani Cristina Stefanelo, Sara Luiza Gusso, Andreia Gerniski Macedo, Paula Cristina Rodrigues, Abd. Rashid bin Mohd Yusoff, Fabio Kurt Schneider, Jeferson Ferreira de Deus, Wilson José da Silva   +9 more
doaj   +1 more source

Optical and X-ray clusters as tracers of the supercluster-void network. I Superclusters of Abell and X-ray clusters

, 2000
We study the distribution of X-ray selected clusters of galaxies with respect to superclusters determined by Abell clusters of galaxies and show that the distribution of X-ray clusters follows the supercluster-void network determined by Abell clusters ...
Cappi A., Dalton G. B., de Vaucouleurs G., E. Tago, Efstathiou G., Einasto J., Einasto J., Einasto J., Einasto M., Einasto M., Einasto M., Ettori S., Guzzo L., H. Andernach, J. Einasto, Jaaniste J., Kull A., M. Einasto, Mattig W., Nesci R., Peacock J. A., Sutherland W., V. Müller, Voges W., White D. A.   +24 more
core   +2 more sources

The diversity in longitudinal partnership trajectories during the transition to adulthood: How is it related to individual characteristics and regional living conditions?

Demographic Research, 2016
Background: Previous research has concentrated on the quantum and timing of partnership statuses during the transition to adulthood, but it has however remained unclear how partnership trajectories unfold and how trajectories interdepend.
Barbara E. Fulda
doaj   +1 more source

Star Clusters

, 1993
This review concentrates almost entirely on globular star clusters. It emphasises the increasing realisation that few of the traditional problems of star cluster astronomy can be studied in isolation: the influence of the Galaxy affects dynamical ...
AK Dupree, B Yanny, CA Christian, CD Bailyn, CD Bailyn, CD Bailyn, DC Heggie, DF Chemoff, DF Chernoff, E Terlevich, E Terlevich, ES Phinney, ES Phinney, F Rasio, G Meylan, H Cohn, HB Richer, IR King, JE Norris, JG Hills, JG Hills, JH Applegate, JS Stodólkiewicz, K Cudworth, K Cudworth, L Angeletti, L Spitzer Jr., L Spitzer Jr., M Auriere, M Capaccioli, M Hénon, MB Davies, P Hut, P Hut, P Hut, PW Cleary, R Buonanno, R Zinn, R Zinn, RAW Elson, RP Grabhorn, S Bergh van den, S Djorgovski, S Djorgovski, S Hoerner von, S Hoerner von, S Inagaki, SE Cederbloom, SJ Aarseth, SJ Aarseth, SJ Aarseth, SJ Aarseth, SJ Aarseth, SLW McMillan, TR Lauer, TS Statler, W Benz, Y-W Lee   +57 more
core   +1 more source

High-tech industry development: selection of technology parks operation model elements in the field of high technology

Управление
The article presents the justification of model elements choice for technology parks work in the sphere of high technologies in Russia. The methodology for creating the model, which was built on the position of borrowing the best practices of existing ...
V. V. Degtyareva, M. S. Seregin
doaj   +1 more source

Electrochemical Flocculation Integrated Hydrogen Evolution Reaction of Fe@N‐Doped Carbon Nanotubes on Iron Foam for Ultralow Voltage Electrolysis in Neutral Media

Advanced Science, 2019
Hydrogen (H2) production is a key step in solving the energy crisis in the future. Electrocatalytic water splitting suffers from sluggish anodic oxygen evolution reaction (OER) kinetics leading to low energy conversion efficiency.
Jiayuan Yu, Guixiang Li, Hui Liu, Lili Zeng, Lili Zhao, Jin Jia, Mingyuan Zhang, Weijia Zhou, Hong Liu, Yongyou Hu   +9 more
doaj   +1 more source