Results 1 to 10 of about 1,731,917 (295)

Energy Cost and Energy Sources During a Simulated Firefighting Activity

Journal of Strength and Conditioning Research, 2010
This study aimed to 1) analyze the energy requirement (VO2eq) and the contribution of the aerobic (VO2ex), anaerobic alactic (VO2al), and anaerobic lactic (VO2la-) energy sources of a simulated intervention; 2) ascertain differences in mean VO2 and heart rate (HR) during firefighting tasks; and 3) verify the relationship between time of job completion ...
PERRONI, Fabrizio, Tessitore A, Cortis C, LUPO, Corrado, D’Artibale E, Cignitti L, De Rosas M, Capranica L.   +7 more
openaire   +5 more sources

Intraspecific Versus Interspecific Scaling of Metabolic Rate: Tests of the Metabolic Theory of Ecology Across Biological Hierarchies

Biology
The Metabolic Theory of Ecology (MTE) proposes universal constants for the scaling of metabolic rate (BMR) with body mass and temperature. However, the validity of these constants across different biological hierarchies, specifically within versus ...
Jiayin Wang, Lei Zhao
doaj   +1 more source

intrinsic activation energy

, 2014
Citation: 'intrinsic activation energy' in the IUPAC Compendium of Chemical Terminology, 3rd ed.; International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. 10.1351/goldbook.I03134 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for individual terms.
openaire   +1 more source

Non-empirical calculations for minimal energetic reaction pathways of hf molecule addition to acetylene and methylacetylene

Тонкие химические технологии, 2009
Potential energy surfaces of gas-phased synchronous addition of HF to acetylene and methylacetylene. A non-empirical Harthree-Fock-Ruthane method (Gaussian-03, G-31++G** basis) with electronic correlation consideration in MP2 approximation (Moeller ...
Yu. B. Kirillov, N. M. Klimenko
doaj  

Investigation of the Electrical Properties of Polycrystalline Crednerite CuMn_1−xMg_xO₂ (x = 0–0.06)-Type Materials in a Low-Frequency Field

Crystals
CuMn1−xMgxO2 (x = 0–0.06) polycrystalline samples were prepared using the hydrothermal method at T = 100 °C for 24 h in Teflon-line stainless steel autoclaves.
Iosif Malaescu, Maria Poienar, Catalin N. Marin   +2 more
doaj   +1 more source

Study of Structural, Dielectric, and Phase Transition of Strontium Doped BaTiO₃

Indonesian Journal of Chemistry
In this paper, we studied the effect of strontium doping on the structural, microstructural, dielectric, and electrical properties of Ba1-xSrxTiO3 (BSxT) ceramics prepared via the sol-gel method, with x = 0.00 to 0.15. The results obtained from the X-ray
Asmaa Zouitine, Abdelhak El Ghandouri, Abdelhalim Elbasset, Farid Abdi, Taj-dine Lamcharfi, Hicham Laribou, Lamiae Mrharrab, Zouhairi Mohammed   +7 more
doaj   +1 more source

Magneto-thermal optimization of Prandtl-Eyring nanofluids over an expanding cylinder in a variable porous medium: an entropic and activation energy perspective

Journal of Taibah University for Science
Heat transfer in non-Newtonian nanofluids is vital for cooling, energy systems, and biomedical applications. This study examines the thermophysical behavior of Prandtl–Eyring nanofluids under magnetohydrodynamic effects within a Riga cylindrical tube ...
Sameh A. Hussein, Anas A. M. Arafa, Khaled Lotfy, Abd Allah A. Mousa, Aly R. Seadawy   +4 more
doaj   +1 more source

Effect of CaO/SiO₂ and MgO/Al₂O₃ on the Metallurgical Properties of Low Boron-Bearing High-Alumina Slag

Inorganics
For optimizing the operational efficiency and productivity within blast furnace processes, a profound understanding of the viscous flow characteristics of CaO–SiO2–MgO–Al2O3–B2O3 slag systems is of paramount importance.
Ye Sun, Zuoliang Zhang, Chunlei Wu, Zhenggen Liu   +3 more
doaj   +1 more source

Influence of several metal ions on the gelation activation energy of silicon tetraethoxide [PDF]

The effects of nine metal cations (Li(+), Na(+), Mg(2+), Ca(2+), Sr(2+), Cu(2+), Al(3+), La(3+), and Y(3+) on silica gel formation has been investigated by studying the hydrolysis and polycondensation of silicon tetraethoxide (TEOS) in the presence of ...
Bansal, Narottam P.
core   +1 more source

Ammonium Nitrate Coating with Nitrocellulose or the Inverse? A Study of the Coating Process and an Investigation of the Resulting Combustion Parameters

Applied Sciences
This research focused on studying the issue of coating ammonium nitrate (AN) with nitrocellulose (NC) and its microcrystalline form (MNC), using two esterification methods: traditional (HNO3/H2SO4) and in situ synthesis (KNO3/H2SO4).
Magdalena Fabin, Tomasz Jarosz, Kamil Barczak, Agnieszka Stolarczyk   +3 more
doaj   +1 more source