scholarly journals Role of nutrition in performance enhancement and postexercise recovery

2015 ◽  
pp. 259 ◽  
Author(s):  
Kathryn Beck ◽  
Jasmine S Thomson ◽  
Richard J Swift ◽  
Pamela R von Hurst
Keyword(s):  
Performance Enhancement ◽  
Postexercise Recovery

scholarly journals Modelling Cationic Diffusion in Nickel-Based Honeycomb Layered Tellurates using Vashishta-Rahman Interatomic Potential and Relevant Insights

2021 ◽  
Author(s):  
Kartik Sau ◽  
Tamio Ikeshoji ◽  
Godwill Mbiti Kanyolo ◽  
Titus Masese
Keyword(s):  
Performance Enhancement ◽  
Interatomic Potential ◽  
Theoretical Studies ◽  
Layered Oxides ◽  
Ionic Radii ◽  
Diffusion Channel ◽  
Exponential Increase ◽  
Potential Parameters ◽  
Insight Into

<b>Although the fascinatingly rich crystal chemistry of honeycomb layered oxides has been accredited as the propelling force behind their remarkable electrochemistry, the atomistic mechanisms surrounding their operations remain unexplored. Thus, herein, we present an extensive molecular dynamics study performed systematically using a refined set of inter-atomic potential parameters of <i>A</i><sub>2</sub>Ni<sub>2</sub>TeO<sub>6</sub> (where <i>A</i> = Li, Na, and K). We demonstrate the effectiveness of the Vashishta-Rahman form of the interatomic potential in reproducing various structural and transport properties of this promising class of materials and predict an exponential increase in cationic diffusion with larger interlayer distances. The simulations further demonstrate the correlation between broadened inter-layer (inter-slab) distances associated with the larger ionic radii of K and Na compared to Li and the enhanced cationic conduction exhibited in K<sub>2</sub>Ni<sub>2</sub>TeO<sub>6</sub> and Na<sub>2</sub>Ni<sub>2</sub>TeO<sub>6</sub> relative to Li<sub>2</sub>Ni<sub>2</sub>TeO<sub>6</sub>. Whence, our findings connect lower potential energy barriers, favourable cationic paths and wider bottleneck size along the cationic diffusion channel within frameworks (comprised of larger mobile cations) to the improved cationic diffusion experimentally observed in honeycomb layered oxides. Furthermore, we explicitly study the role of inter-layer distance and cationic size in cationic diffusion. Our theoretical studies reveal the dominance of inter-layer distance over cationic size, a crucial insight into the further performance enhancement of honeycomb layered oxides.</b><br>

scholarly journals Modelling Cationic Diffusion in Nickel-Based Honeycomb Layered Tellurates using Vashishta-Rahman Interatomic Potential and Relevant Insights

2021 ◽  
Author(s):  
Kartik Sau ◽  
Tamio Ikeshoji ◽  
Godwill Mbiti Kanyolo ◽  
Titus Masese
Keyword(s):  
Performance Enhancement ◽  
Interatomic Potential ◽  
Layered Oxides ◽  
Ionic Radii ◽  
Diffusion Channel ◽  
Atomic Potential ◽  
Exponential Increase ◽  
Potential Parameters ◽  
Insight Into

<b>Although the fascinatingly rich crystal chemistry of honeycomb layered oxides has been accredited as the propelling force behind their remarkable electrochemistry, the atomistic mechanisms surrounding their operations remain unexplored. Thus, herein, we present an extensive molecular dynamics study performed systematically using a reliable set of inter-atomic potential parameters of </b><i>A</i><sub>2</sub><b>Ni</b><sub>2</sub><b>TeO</b><sub>6</sub><b> (where </b><i>A</i><b> = Li, Na, and K). We demonstrate the effectiveness of the Vashishta-Rahman form of the inter-atomic potential in reproducing various structural and transport properties of this promising class of materials and predict an exponential increase in cationic diffusion with larger inter-layer distances. The simulations demonstrate the correlation between broadened inter-layer (inter-slab) distances associated with the larger ionic radii of K and Na compared to Li and the enhanced cationic conduction exhibited in K</b><sub>2</sub><b>Ni</b><sub>2</sub><b>TeO</b><sub>6</sub><b> and Na</b><sub>2</sub><b>Ni</b><sub>2</sub><b>TeO</b><sub>6</sub><b> relative to Li</b><sub>2</sub><b>Ni</b><sub>2</sub><b>TeO</b><sub>6</sub><b>. Whence, our findings connect lower potential energy barriers, favourable cationic paths and wider bottleneck size along the cationic diffusion channel within frameworks (comprised of larger mobile cations) to the improved cationic diffusion experimentally observed in honeycomb layered oxides. Furthermore, we elucidate the role of inter-layer distance and cationic size in cationic diffusion. Our theoretical studies reveal the dominance of inter-layer distance over cationic size, a crucial insight into the further performance enhancement of honeycomb layered oxides.</b><br>

Metabolic adrenergic changes during submaximal exercise and in the recovery period in man

1979 ◽  
Vol 47 (4) ◽  
pp. 701-705 ◽  
Author(s):  
J. M. Pequignot ◽  
L. Peyrin ◽  
M. H. Mayet ◽  
R. Flandrois
Keyword(s):  
Recovery Period ◽  
Submaximal Exercise ◽  
Short Term ◽  
Lipid Mobilization ◽  
Healthy Men ◽  
Muscular Work ◽  
Urinary Levels ◽  
Postexercise Recovery ◽  
Vanilmandelic Acid

The urinary excretion of dihydroxyphenylalanine (DOPA), catecholamines (CA) [dopamine (DA), norepinephrine (NE), and epinephrine (e)], their 3-O-methylated derivatives [3-O-methyldopamine (3-MT), normetanephrine (NMN), and metanephrine (MN)], and their deaminated metabolites [dihydroxyphenylacetic acid (DOPAC) and vanilmandelic acid (VMA)] was studied in six healthy men, at rest during short-term (15 min) or exhaustive submaximal exercise, and in the 2-h postexercise recovery period. During short-term exercise only NE and VMA excretions increased, whereas in postexercise period only DA output was enhanced. Exhaustive muscular work induced a rise in NE and E excretion during the test, and an increase in DA, NE, and NMN urinary levels during postexercise recovery, while the output of deaminated metabolites was unaltered. It is concluded that both release and synthesis of CA are stimulated by submaximal exercise, which induces, in addition to NE, a specific release of DA. A possible role of NE in lipid mobilization during recovery from exhaustive muscular work is evoked. The origin and role of released DA are also discussed.

scholarly journals Role of optimization algorithms based fuzzy controller in achieving induction motor performance enhancement

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
M. A. Hannan ◽  
Jamal Abd. Ali ◽  
M. S. Hossain Lipu ◽  
A. Mohamed ◽  
Pin Jern Ker ◽  
...  
Keyword(s):  
Induction Motor ◽  
Motor Performance ◽  
Performance Enhancement ◽  
Fuzzy Controller ◽  
Optimization Algorithms

Ibuprofen treatment blunts early translational signaling responses in human skeletal muscle following resistance exercise

2014 ◽  
Vol 117 (1) ◽  
pp. 20-28 ◽  
Author(s):  
James F. Markworth ◽  
Luke D. Vella ◽  
Vandre C. Figueiredo ◽  
David Cameron-Smith
Keyword(s):  
Resistance Exercise ◽  
Ribosomal Protein ◽  
Placebo Control ◽  
S6 Kinase ◽  
Ribosomal Protein S6 ◽  
Cyclooxygenase 1 ◽  
Postexercise Recovery ◽  
Muscle Biopsies ◽  
Muscle Responses

Cyclooxygenase-1 and -2 pathway-derived prostaglandins (PGs) have been implicated in adaptive muscle responses to exercise, but the role of PGs in contraction-induced muscle signaling has not been determined. We investigated the effect of inhibition of cyclooxygenase-1 and -2 activities with the nonsteroidal anti-inflammatory drug ibuprofen on human muscle signaling responses to resistance exercise. Subjects orally ingested 1,200 mg ibuprofen (or placebo control) in three 400-mg doses administered ∼30 min before and ∼6 h and ∼12 h following a bout of unaccustomed resistance exercise (80% one repetition maximum). Muscle biopsies were obtained at rest (preexercise), immediately postexercise (0 h), 3 h postexercise, and at 24 h of recovery. In the placebo (PLA) group, phosphorylation of ERK1/2 (Thr202/Tyr204), ribosomal protein S6 kinase (RSK, Ser380), mitogen-activated kinase 1 (Mnk1, Thr197/202), and p70S6 kinase (p70S6K, Thr421/Ser424) increased at both 0 and 3 h postexercise, with delayed elevation of phospho (p)-p70S6K (Thr389) and p-rpS6 (Ser235/S36 and Ser240/244) at 3 h postexercise. Only p-ERK1/2 (Thr202/Tyr204) remained significantly elevated in the 24-h postexercise biopsy. Ibuprofen treatment prevented sustained elevation of MEK-ERK signaling at 3 h (p-ERK1/2, p-RSK, p-Mnk1, p-p70S6K Thr421/Ser424) and 24 h (p-ERK1/2) postexercise, and this was associated with suppressed phosphorylation of ribosomal protein S6 (Ser235/236 and Ser240/244). Early contraction-induced p-Akt (Ser473) and p-p70S6K (Thr389) were not influenced by ibuprofen, but p-p70S6K (Thr389) remained elevated 24 h postexercise only in those receiving ibuprofen treatment. Early muscle signaling responses to resistance exercise are, in part, ibuprofen sensitive, suggesting that PGs are important signaling molecules during early postexercise recovery.

scholarly journals Role of Nanostructuring of Sensing Materials in Performance of Electrical Gas Sensors by Combining with Extra Strategies

Nano Express ◽  
2021 ◽  
Author(s):  
Bala Ismail Adamu ◽  
Peipei Chen ◽  
Weiguo Chu
Keyword(s):  
Gas Sensors ◽  
Performance Enhancement ◽  
Population Expansion ◽  
Light Sources ◽  
Three Dimension ◽  
Practical Applications ◽  
Fundamental Research ◽  
Rapid Industrialization ◽  
Size And Morphology

Abstract Nanostructuring, including tailoring dimensionality, size and morphology, and nanopatterning, is well recognized to play an increasingly important role in sensing units/chips of electrical gas sensors. As two predominant and fundamental configurations, chemiresistor- and field emission transistor (FET)-based electrical gas sensors are receiving increasing attention for fundamental research and practical applications. Herein, state-of-the-art overviews of electrical gas sensors are presented with emphasis on the role of nanostructuring in sensing units for both chemiresistors and FETs types, the strategies for their performance enhancement, and some key sensing mechanisms involved. Nanostructuring of sensing units and their dependence of the performance of chemiresistor- and FET-based gas sensors are discussed according to zero- (0D), one-(1D), two- (2D), and three-dimension (3D), respectively. Other types of gas sensors are also mentioned briefly. Some particular strategies such as loading external heat and light sources, electrical field, and mechanical forces for providing extra freedom to improve and optimize the performance are introduced in detail. Finally, a summary and future perspectives about gas sensors are given with some novel strategies, ideas, and solutions that could make it possible to meet the requirements of rapid industrialization, informatization, intelligentization, and population expansion.

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