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Anaerobic work capacity

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https://www.readbyqxmd.com/read/29311763/the-acute-effects-of-a-multi-ingredient-pre-workout-supplement-on-resting-energy-expenditure-and-exercise-performance-in-recreationally-active-females
#1
Michael Cameron, Clayton L Camic, Scott Doberstein, Jacob L Erickson, Andrew R Jagim
Background: The use of dietary supplements to improve performance is becoming increasingly popular among athletes and fitness enthusiasts. Unfortunately, there is a tremendous lack of research being done regarding female athletes and the use of sport supplements. The purpose of this study was to examine the acute effects of multi-ingredient pre-workout supplement (MIPS) ingestion on resting metabolism and exercise performance in recreationally-active females. Methods: Fifteen recreationally-active females participated in a randomized, double-blind, placebo controlled study...
2018: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/29247712/effects-of-normobaric-hypoxia-on-upper-body-critical-power-and-anaerobic-working-capacity
#2
Michael B La Monica, David H Fukuda, Tristan M Starling-Smith, Ran Wang, Jay R Hoffman, Jeffrey R Stout
PURPOSE: To evaluate the effects of moderate normobaric hypoxia on the parameters of the work-time relationship in the upper body. METHODS: Twenty-one recreationally active men completed a graded exercise test in both normobaric hypoxia (H) and normoxia (N) to exhaustion on an arm ergometer to determine V̇O2peak and peak power output (PPO). Each participant completed four constant work-rate (CWR) arm-cranking tests at 90-120% PPO in both environmental conditions...
December 13, 2017: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/29227730/physical-and-performance-characteristics-related-to-unintentional-musculoskeletal-injury-in-special-forces-operators-a-prospective-analysis
#3
Nicholas R Heebner, John P Abt, Mita Lovalekar, Kim Beals, Timothy C Sell, Jeffery Morgan, Shawn Kane, Scott Lephart
CONTEXT:   Seventy-seven percent of musculoskeletal injuries sustained by United States Army Special Forces Operators are preventable. Identification of predictive characteristics will promote the development of screening methods to augment injury-prevention programs. OBJECTIVE:   To determine physical and performance characteristics that predict musculoskeletal injuries. SETTING:   Clinical laboratory. PATIENTS OR OTHER PARTICIPANTS:   A total of 95 Operators (age = 32...
December 11, 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/29207279/biofabrication-of-morphology-improved-cadmium-sulfide-nanoparticles-using-shewanella-oneidensis-bacterial-cells-and-ionic-liquid-for-toxicity-against-brain-cancer-cell-lines
#4
Li Wang, Siyuan Chen, Yiming Ding, Qiang Zhu, Nijia Zhang, Shuqing Yu
The present work determines the anticancer activity of bio-mediated synthesized cadmium sulfide nanoparticles using the ionic liquid and bacterial cells (Shewanella oneidensis). Bacterial cells have been exposed to be important resources that hold huge potential as ecofriendly, cost-effective, evading toxic of dangerous chemicals and the alternative of conventional physiochemical synthesis. The Shewanella oneidensis is an important kind of metal reducing bacterium, known as its special anaerobic respiratory and sulfate reducing capacity...
November 7, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/29195092/dechlorinating-performance-of-dehalococcoides-spp-mixed-culture-enhanced-by-tourmaline
#5
Wei Wang, Xingyu Liu, Kerui Li, Tielong Li
Dehalococcoides spp. were extensively studied and applied to in-situ trichloroethylene (TCE) remediation since it is the only genus that can reduce TCE to harmless ethene completely. However, this technology was hindered because of the requirement of electron donor (i.e. hydrogen or fermentable organic substrate). Considering the spontaneous electric field and in-situ hydrogen production capacity of tourmaline, this mineral was used as an environmental-friendly bio-promoter for dechlorinating mixed culture containing Dehalococcoides spp...
November 20, 2017: Chemosphere
https://www.readbyqxmd.com/read/29132777/a-comparison-between-biostimulation-and-bioaugmentation-in-a-solid-treatment-of-anaerobic-sludge-drug-content-and-microbial-evaluation
#6
G Llorens-Blanch, E Parladé, M Martinez-Alonso, N Gaju, G Caminal, P Blánquez
Emerging pollutants can reach the environment through the sludge of Wastewater Treatment Plants. In this work, the use of Trametes versicolor in biopiles at lab-scale was studied, evaluating its capacity to remove the most hydrophobic Pharmaceuticals and assessing the evolution of the biopiles microbial communities. The total removal of drugs at real concentrations from sewage sludge was assessed for non-inoculated and fungal inoculated biopiles, testing if the re-inoculation of the biopiles after 22 days of treatment would improve the removal yields...
November 10, 2017: Waste Management
https://www.readbyqxmd.com/read/29126065/bioconversion-of-alkaloids-to-high-value-chemicals-comparative-analysis-of-newly-isolated-lupanine-degrading-strains
#7
Stella Parmaki, Ioannis Vyrides, Marlen I Vasquez, Viki Hartman, Irene Zacharia, Ioanna Hadjiadamou, Catarina B M Barbeitos, Frederico C Ferreira, Carlos A M Afonso, Chrysoulla Drouza, Michalis Koutinas
This work explores the potential for development of a lupanine valorization process evaluating different isolated microorganisms for their capacity to metabolize the alkaloid. Ecotoxicological assessment demonstrated that lupanine is toxic for Vibrio fischeri and Daphnia magna exhibiting EC50 values of 89 mg L(-1) and 47 mg L(-1) respectively, while acting both as growth inhibitor for a monocotyledonous and as promoter for a dicotyledonous plant. Among the eight aerobic and anaerobic strains isolated and identified Rhodococcus rhodochrous LPK211 achieved 81% removal for 1...
October 30, 2017: Chemosphere
https://www.readbyqxmd.com/read/29104938/vitamin-and-amino-acid-auxotrophy-in-anaerobic-consortia-operating-under-methanogenic-conditions
#8
Valerie Hubalek, Moritz Buck, BoonFei Tan, Julia Foght, Annelie Wendeberg, David Berry, Stefan Bertilsson, Alexander Eiler
Syntrophy among Archaea and Bacteria facilitates the anaerobic degradation of organic compounds to CH4 and CO2. Particularly during aliphatic and aromatic hydrocarbon mineralization, as in the case of crude oil reservoirs and petroleum-contaminated sediments, metabolic interactions between obligate mutualistic microbial partners are of central importance. Using micromanipulation combined with shotgun metagenomic approaches, we describe the genomes of complex consortia within short-chain alkane-degrading cultures operating under methanogenic conditions...
September 2017: MSystems
https://www.readbyqxmd.com/read/29081845/the-effects-of-aerobic-and-anaerobic-exercises-on-circulating-soluble-klotho-and-igf-i-in-young-and-elderly-adults-and-in-cad-patients
#9
REVIEW
Moran S Saghiv, D Ben Sira, E Goldhammer, M Sagiv
Different studies support the notion that chronic aerobic exercises training can influence the circulating levels of soluble-Klotho (s-Klotho) and insulin-like growth factor 1 (IGF-I). The effects of s-Klotho include improving the quality of life, alleviating the negative impact of age on the body's work capacity, and possibly increasing longevity. This review provides an overview of the latest findings in this field of research in humans. The different modes of dynamic exercise and their impact on circulating levels of s-Klotho and IGF-I in young adult athletes, untrained young adults, trained healthy older adults, untrained healthy older adults, and coronary artery disease (CAD) patients are reviewed and discussed...
January 2017: Journal of Circulating Biomarkers
https://www.readbyqxmd.com/read/29065215/on-the-catabolism-of-amino-acids-in-the-yeast-dekkera-bruxellensis-and-the-implications-to-industrial-fermentation-processes
#10
Denise Castro Parente, Danielli Batista Bezerra Cajueiro, Irina Charlot Peña Moreno, Fernanda Cristina Bezerra Leite, Will de Barros Pita, Marcos Antonio de Morais
In the last years several reports have reported the capacity of the yeast Dekkera (Brettanomyces) bruxellensis to survive and adapt to the industrial process of alcoholic fermentation. Much of this feature seems to relate to the ability to assimilate limiting sources of nutrients, or somehow some that are inaccessible to Saccharomyces cerevisiae, in particular the sources of nitrogen. Among them, amino acids (AA) are relevant in terms of beverage musts, and could also be important for bioethanol. In view of the limited knowledge on the control of AA, the present work combines physiological and genetic studies to understand how it operates in D...
October 24, 2017: Yeast
https://www.readbyqxmd.com/read/29040646/statins-affect-skeletal-muscle-performance-evidence-for-disturbances-in-energy-metabolism
#11
Neeltje A E Allard, Tom J J Schirris, Rebecca J Verheggen, Frans G M Russel, Richard J Rodenburg, Jan A M Smeitink, Paul D Thompson, Maria T E Hopman, Silvie Timmers
Context: Statin myopathy is linked to disturbances in mitochondrial function and exercise intolerance. Objectives: To determine whether differences exist in exercise performance, muscle function and mitochondrial oxidative capacity and content between symptomatic and asymptomatic statin users, and non-statin using controls. Design: Cross-sectional study. Setting: Department of Physiology of the Radboud University Medical Center...
October 9, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28903764/comparative-assessment-of-fermentative-capacity-of-different-xylose-consuming-yeasts
#12
Henrique César Teixeira Veras, Nádia Skorupa Parachin, João Ricardo Moreira Almeida
BACKGROUND: Understanding the effects of oxygen levels on yeast xylose metabolism would benefit ethanol production. In this work, xylose fermentative capacity of Scheffersomyces stipitis, Spathaspora passalidarum, Spathaspora arborariae and Candida tenuis was systematically compared under aerobic, oxygen-limited and anaerobic conditions. RESULTS: Fermentative performances of the four yeasts were greatly influenced by oxygen availability. S. stipitis and S. passalidarum showed the highest ethanol yields (above 0...
September 13, 2017: Microbial Cell Factories
https://www.readbyqxmd.com/read/28875251/the-effect-of-substrate-inoculum-ratio-on-the-kinetics-of-methane-production-in-swine-wastewater-anaerobic-digestion
#13
Verónica Córdoba, Mónica Fernández, Estela Santalla
Methane production from swine wastewater was evaluated by using sewage sludge as inoculum in three substrate to inoculum ratios (SIRs) named A (1:1), B (3:1) and C (6:1), with the objective to identify the proportion that optimizes the performance of the process. Duplicated batch bioreactors of 1 L capacity under mesophilic conditions were used to carry out the experiment. The highest biogas yield was observed in A treatment (554 ± 75 mL/g volatile solid (VS)). Cumulative methane production decreased from 382 ± 22 to 232 ± 5 mL/g VS when SIR increased from 1:1 to 6:1...
September 5, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28835177/organic-loading-rate-olr-effect-in-the-acidogenesis-of-cheese-whey-uasb-and-an-sbr-reactors-comparison
#14
R Calero, R Iglesias-Iglesias, M C Veiga, C Kennes
Volatile fatty acid (VFA) production and degree acidification (DA) were investigated in the anaerobic treatment of cheese whey (CW) by comparison of two processes, a continuous process using a laboratory Upflow Anaerobic Sludge Blanket (UASB) and discontinuous process using a Sequencing Batch Reactor (SBR). The main purpose of this work was the study of the organic loading rate (OLR) effect on the capacity to obtain the maximum yield of VFA in the two kinds of reactor. The predominant products in the acidogenic process in both reactors were: acetate, propionate, butyrate and valerate...
August 23, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28832393/caffeine-increases-work-done-above-critical-power-but-not-anaerobic-work
#15
Rodrigo Silveira, Victor Amorim Andrade-Souza, Lucyana Arcoverde, Fabiano Tomazini, André Sansonio, David John Bishop, Romulo Bertuzzi, Adriano Eduardo Lima-Silva
PURPOSE: The assumption that the curvature constant (W´) of the power-duration relationship represents anaerobic work capacity is a controversial, unresolved question. We investigated if caffeine ingestion could increase total work done above critical power (CP), and if this would be accompanied by greater anaerobic energy expenditure and by an enhanced maintenance of maximal oxidative metabolic rate. METHODS: Nine men (26.6 ± 5.3 years, V˙O2max 40.6 ± 5.8 mL·kg·min) cycled until exhaustion at different exercise intensities on different days to determine the CP and W´...
August 21, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28804812/predominance-of-comorbidities-in-the-detriment-of-daily-activity-in-sarcoidosis-patients
#16
S Kostorz, D Jastrzębski, M Sikora, A Zebrowska, A Margas, D Stepanik, H Swinder, D Ziora
Sarcoidosis may affect lung function, working ability, overall mobility, and daily activity. In the present study we performed an analysis of clinical settings in patients with sarcoidosis to disentangle its influence on daily physical activity (PA). PA assessment (number of steps per day, daily energy expenditure) was performed by accelerometry during consecutive 7 days after discharge from hospital. Thirty patients with sarcoidosis, aged 46.4 ± 10.5, were enrolled in the study. Clinical data (age, gender, steroid consumption, weight, and comorbidities), lung function tests (forced expiratory volume in one second - FEV1, forced vital capacity - FVC, and lung diffusion for carbon monoxide - DLCO), mobility (6-minute walk test- 6MWT) and physical performance (oxygen consumption at anaerobic threshold - VO2/AT) were estimated...
August 15, 2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28724255/effects-of-organic-composition-on-the-anaerobic-biodegradability-of-food-waste
#17
Yangyang Li, Yiying Jin, Aiduan Borrion, Hailong Li, Jinhui Li
This work investigated the influence of carbohydrates, proteins and lipids on the anaerobic digestion of food waste (FW) and the relationship between the parameters characterising digestion. Increasing the concentrations of proteins and lipids, and decreasing carbohydrate content in FW, led to high buffering capacity, reduction of proteins (52.7-65.0%) and lipids (57.4-88.2%), and methane production (385-627 mLCH4/g volatile solid), while achieving a short retention time. There were no significant correlations between the reduction of organics, hydrolysis rate constant (0...
November 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28664497/bacterial-periphytic-communities-related-to-mercury-methylation-within-aquatic-plant-roots-from-a-temperate-freshwater-lake-south-western-france
#18
Sophie Gentès, Julie Taupiac, Yannick Colin, Jean-Marc André, Rémy Guyoneaud
Macrophyte floating roots are considered as hotspots for methylmercury (MeHg) production in aquatic ecosystems through microbial activity. Nevertheless, very little is known about periphyton bacterial communities and mercury (Hg) methylators in such ecological niches. The ability to methylate inorganic Hg is broadly distributed among prokaryotes; however, sulfate-reducers have been reported to be the most important MeHg producers in macrophyte floating roots. In the present work, the periphyton bacterial communities colonizing Ludwigia sp...
June 30, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28628978/a-high-throughput-dye-reducing-photometric-assay-for-evaluating-microbial-exoelectrogenic-ability
#19
Xiang Xiao, Qiu-Yue Liu, Ting-Ting Li, Feng Zhang, Wen-Wei Li, Xiang-Tong Zhou, Mei-Ying Xu, Qian Li, Han-Qing Yu
Exoelectrogenic bacteria (EEB) can transfer electrons to extracellular electron acceptors and have wide applications in environmental bioremediation and bioenergy generation. Thus, methods for effectively probing the exoelectrogenic ability of EEB are highly desirable. In this work, a simple but efficient photometric assay based on the extracellular reduction of high polar dyes was developed to evaluate the microbial exoelectrogenic ability. Methyl orange were proven to be used as a probe for evaluating the exoelectrogenic ability of EEB...
October 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28625987/metabolic-engineering-of-actinobacillus-succinogenes-provides-insights-into-succinic-acid-biosynthesis
#20
Michael T Guarnieri, Yat-Chen Chou, Davinia Salvachúa, Ali Mohagheghi, Peter C St John, Darren J Peterson, Yannick J Bomble, Gregg T Beckham
Actinobacillus succinogenes, a Gram-negative facultative anaerobe, exhibits the native capacity to convert pentose and hexose sugars to succinic acid (SA) with high yield as a tricarboxylic acid (TCA) cycle intermediate. In addition, A. succinogenes is capnophilic, incorporating CO2 into SA, making this organism an ideal candidate host for conversion of lignocellulosic sugars and CO2 to an emerging commodity bioproduct sourced from renewable feedstocks. In this work, we report the development of facile metabolic engineering capabilities in A...
September 1, 2017: Applied and Environmental Microbiology
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