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Oxygen consumption

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https://www.readbyqxmd.com/read/28731131/assessment-of-the-antioxidant-activity-of-an-olive-oil-total-polyphenolic-fraction-and-hydroxytyrosol-from-a-greek-olea%C3%A2-europea-variety-in-endothelial-cells-and-myoblasts
#1
Paraskevi Kouka, Alexandros Priftis, Dimitrios Stagos, Apostolis Angelis, Panagiotis Stathopoulos, Nikos Xinos, Alexios-Léandros Skaltsounis, Charalampos Mamoulakis, Aristides M Tsatsakis, Demetrios A Spandidos, Demetrios Kouretas
Olive oil (OO) constitutes the basis of the Mediterranean diet, and it seems that its biophenols, such as hydroxytyrosol (HT) may scavenge free radicals, attracting distinct attention due to their beneficial effects in many pathological conditions, such as cancer. To the best of our knowedge, this is the first study in which the functional properties of an OO total polyphenolic fraction (TPF) and pure HT were examined in order to determine their antioxidant effects at a cellular level in endothelial cells and myoblasts...
July 20, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28731097/dba-induced-caspase-3-dependent-apoptosis-occurs-through-mitochondrial-translocation-of-cyt-c-in-the-rat-hippocampus
#2
Wenbo Jiang, Yingying Chen, Bai Li, Shuying Gao
Dibromoacetic acid (DBA), a by-product of disinfection, develops in drinking water during chlorination or ozonation processes. Water intake is the main source of DBA exposure in humans, which is potentially neurotoxic. The present study investigated the neurotoxic effects of DBA by assessing the behavioral and biochemical characteristics of Sprague Dawley rats intragastrically treated with DBA at concentrations of 20, 50 and 125 mg kg(-1) body weight for 28 consecutive days. The results indicated that animal weight gain and food consumption were not significantly affected by DBA...
July 21, 2017: Molecular BioSystems
https://www.readbyqxmd.com/read/28729344/exogenous-stress-hormones-alter-energetic-and-nutrient-costs-of-development-and-metamorphosis
#3
Lucas J Kirschman, Marshall D McCue, Justin G Boyles, Robin W Warne
Variation in environmental conditions during larval life stages can shape development during critical windows and have lasting effects on the adult organism. Changes in larval developmental rates in response to environmental conditions, for example, can trade-off with growth to determine body size and condition at metamorphosis, which can affect adult survival and fecundity. However, it is unclear how use of energy and nutrients shape trade-offs across life stage transitions because no studies have quantified these costs of larval development and metamorphosis...
July 20, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28728958/effectiveness-of-resistance-exercise-compared-to-aerobic-exercise-without-insulin-therapy-in-patients-with-type-2-diabetes-mellitus-a-meta-analysis
#4
REVIEW
Cybelle Nery, Silvia Regina Arruda De Moraes, Karyne Albino Novaes, Márcio Almeida Bezerra, Patrícia Verçoza De Castro Silveira, Andrea Lemos
BACKGROUND: Physical exercise has been used to mitigate the metabolic effects of diabetes mellitus. OBJECTIVE: To evaluate the effect of resistance exercise when compared to aerobic exercise without insulin therapy on metabolic and clinical outcomes in patients with type 2 diabetes mellitus. METHODS: Papers were searched on the databases MEDLINE/PubMed, CINAHL, SPORTDiscus, LILACS, and SCIELO, without language or date of publication limits...
July 5, 2017: Brazilian Journal of Physical Therapy
https://www.readbyqxmd.com/read/28727087/effects-of-zilpaterol-hydrochloride-on-methane-production-total-body-oxygen-consumption-and-blood-metabolites-in-finishing-beef-steers
#5
K E Hales, A P Foote, D W Brake, T M Brown-Brandl, V M Artegoitia, H C Freetly
An indirect calorimetry experiment was conducted to determine the effects of feeding zilpaterol hydrochloride (ZH) for 20 d on total body oxygen consumption, respiratory quotient, methane production, and blood metabolites in finishing beef steers. Sixteen Angus steers (initial BW = 555 ± 12.7 kg) were individually fed at ad libitum intake and used in a completely randomized design. The model included the fixed effects of dietary treatment, day, and treatment × day. Dry matter intake did not differ between the treatments ( = 0...
July 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28727073/technical-note-valuation-of-an-enteric-methane-emissions-measurement-system-for-cattle
#6
E M Andreini, M S Calvo-Lorenzo, C J Richards, J E White, S E Place
Through the process of enteric fermentation, cattle produce methane (CH), a potent greenhouse gas (GHG). Growing public concern about climate change has increased the need for accurate methods of measuring CH emissions from cattle directly to improve emission inventories and evaluate emissions mitigation techniques. The present study evaluated a ventilated head box system capable of measuring CH and carbon dioxide (CO) emissions, and oxygen (O) consumption from cattle. Six Holstein heifers were used to measure CH and CO emissions and O consumption from 2 ad libitum intake measurement periods (ADAPT and ADLIB) and 1 measurement period (RESTRICT) with intake restricted to 2% of BW on a DM basis...
June 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28727009/effects-of-energy-supplementation-on-energy-losses-and-nitrogen-balance-of-steers-fed-green-chopped-wheat-pasture-i-calorimetry
#7
A L Shreck, P J Ebert, E A Bailey, J S Jennings, K D Casey, B E Meyer, N A Cole
Cattle grazing wheat pasture in the southern Great Plains are sometimes fed an energy supplement; however, the benefits of supplementation on nutrient balance, energy metabolism, and greenhouse gas emissions have not been elucidated. Therefore, we used 10 British crossbred steers (206 ± 10.7 kg initial BW) in a respiration calorimetry study to evaluate the effects of energy supplementation on energy losses, N balance, and nutrient digestibility of steers fed green-chopped wheat forage. The study design was an incomplete replicated 4 × 4 Latin square with treatments in a 2 × 2 factorial arrangement...
May 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28726270/equimolar-mixture-of-nitroux-oxyde-and-oxygen-during-post-operative-physiotherapy-in-patients-with-cerebral-palsy-a-randomized-double-blind-placebo-controlled-study
#8
A Delafontaine, A Presedo, D Mohamed, D Lopes, C Wood, C Alberti
BACKGROUND: The administration of an equimolar mixture of nitrous oxide and oxygen (N2O) is recommended during painful procedures. However, the evaluation of its use during physiotherapy after surgery has not been reported, although pain may hamper physiotherapy efficiency. This study investigated whether the use of N2O improves the efficacy of post-operative physiotherapy after multilevel surgery in patients with cerebral palsy. METHOD: It was a randomized 1:1, double-blind, placebo-controlled study...
July 20, 2017: European Journal of Pain: EJP
https://www.readbyqxmd.com/read/28726229/monitoring-and-modeling-4-chlorophenol-biodegradation-kinetics-by-phenol-acclimated-activated-sludge-by-using-open-respirometry
#9
Cintia C Lobo, Nora C Bertola, Edgardo M Contreras, Noemí E Zaritzky
The aim of this study was to analyze the mechanisms, stoichiometry, and stability of 4-chlorophenol (4CP) biodegradation kinetics by phenol-acclimated activated sludge using open respirometry. While the removal of 4CP was higher than 98%, the removal of chemical oxygen demand (COD) ranged between 69 and 79% due to the accumulation of an intermediate metabolite. The value obtained from respirometric profiles for the stoichiometric ratio of O2 to 4CP (YO2/4CP) was 1.95 ± 0.04 mol of oxygen consumed per mol of 4CP removed...
July 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28726197/effect-of-phenibut-and-glufimet-a-novel-glutamic-acid-derivative-on-respiration-of-heart-and-brain-mitochondria-from-animals-exposed-to-stress-against-the-background-of-inducible-no-synthase-blockade
#10
V N Perfilova, T A Popova, I I Prokofiev, I S Mokrousov, O V Ostrovskii, I N Tyurenkov
Increased oxygen consumption by heart and brain mitochondria in the absence of ADP and reduced mitochondrial respiration in the presence of ADP were observed in rats exposed to stress simulated by suspension by the dorsal neck skin fold for 24 h, which attests to uncoupling of substrate oxidation and ATP synthesis and can cause electron drain from the respiratory chain, formation of ROS, and oxidative damage to cell structures. Blockade of inducible NO synthase with aminoguanidine (single intraperitoneal dose of 50 mg/kg before stress exposure) increased coupling of respiration and oxidative phosphorylation in heart and brain mitochondria of rats exposed to immobilization-painful stress, which was especially pronounced in cardiomyocytes...
July 18, 2017: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28724704/physiological-responses-to-short-term-thermal-stress-in-mayfly-neocloeon-triangulifer-larvae-in-relation-to-upper-thermal-limits
#11
Kyoung Sun Kim, Hsuan Chou, David H Funk, John K Jackson, Bernard W Sweeney, David B Buchwalter
Understanding species' thermal limits and their physiological determinants is critical in light of climate change and other human activities that warm freshwater ecosystems. Here, we ask whether oxygen limitation determines the chronic upper thermal limits in larvae of the mayfly Neocloeon triangulifer, an emerging model for ecological and physiological studies. Our experiments are based on a robust understanding of the upper acute (∼40°C) and chronic thermal limits of this species (>28°C, ≤30°C) derived from full life cycle rearing experiments across temperatures...
July 15, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28723567/cold-inducible-sirt6-regulates-thermogenesis-of-brown-and-beige-fat
#12
Lu Yao, Xiaona Cui, Qi Chen, Xiaoying Yang, Fude Fang, Jun Zhang, Guoqing Liu, Wanzhu Jin, Yongsheng Chang
Promoting development and function of brown and beige fat may reduce obesity. Here, we show that fat SIRT6 expression is markedly induced by cold exposure and a β-adrenergic agonist. Deletion of SIRT6 in adipose tissue impairs the thermogenic function of brown adipocytes, causing a morphological "whitening" of brown fat, reduced oxygen (O2) consumption, obesity, decreased core body temperature, and cold sensitivity. Fat SIRT6-deleted mice exhibit increased blood glucose levels, severe insulin resistance, and hepatic steatosis...
July 18, 2017: Cell Reports
https://www.readbyqxmd.com/read/28721476/post-prandial-physiology-and-intestinal-morphology-of-the-pacific-hagfish-eptatretus-stoutii
#13
Alyssa M Weinrauch, Alexander M Clifford, Greg G Goss
Hagfishes are unique to the vertebrate lineage in that they acquire dissolved nutrients across multiple epithelia including the intestine, gill, and skin. This feat has been attributed to their immersive feeding behavior that likely simultaneously provides benefits (nutrient rich) and potentially adverse (hypercapnia, hypoxia, high environmental ammonia) physiological effects. Examinations have been conducted of the ex vivo transport capabilities of specific nutrients as well as in vivo effects of the hypothesized feeding environments, yet the physiological effects of feeding itself have never been elucidated...
July 18, 2017: Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
https://www.readbyqxmd.com/read/28721122/hypoxic-training-increases-maximal-oxygen-consumption-in-thoroughbred-horses-well-trained-in-normoxia
#14
Hajime Ohmura, Kazutaka Mukai, Yuji Takahashi, Toshiyuki Takahashi, James H Jones
Hypoxic training is effective for improving athletic performance in humans. It increases maximal oxygen consumption (V̇O2max) more than normoxic training in untrained horses. However, the effects of hypoxic training on well-trained horses are unclear. We measured the effects of hypoxic training on V̇O2max of 5 well-trained horses in which V̇O2max had not increased over 3 consecutive weeks of supramaximal treadmill training in normoxia which was performed twice a week. The horses trained with hypoxia (15% inspired O2) twice a week...
2017: Journal of Equine Science
https://www.readbyqxmd.com/read/28720899/p32-heterozygosity-protects-against-age-and-diet-induced-obesity-by-increasing-energy-expenditure
#15
Yong Liu, Patrick L Leslie, Aiwen Jin, Koji Itahana, Lee M Graves, Yanping Zhang
Obesity is increasing in prevalence and has become a global public health problem. The main cause of obesity is a perturbation in energy homeostasis, whereby energy intake exceeds energy expenditure. Although mitochondrial dysfunction has been linked to the deregulation of energy homeostasis, the precise mechanism is poorly understood. Here, we identify mitochondrial p32 (also known as C1QBP) as an important regulator of lipid homeostasis that regulates both aerobic and anaerobic energy metabolism. We show that while whole-body deletion of the p32 results in an embryonic lethal phenotype, mice heterozygous for p32 are resistant to age- and high-fat diet-induced ailments, including obesity, hyperglycemia, and hepatosteatosis...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28720832/deep-ocean-dissolved-organic-matter-reactivity-along-the-mediterranean-sea-does-size-matter
#16
Alba María Martínez-Pérez, Xosé Antón Álvarez-Salgado, Javier Arístegui, Mar Nieto-Cid
Despite of the major role ascribed to marine dissolved organic matter (DOM) in the global carbon cycle, the reactivity of this pool in the dark ocean is still poorly understood. Present hypotheses, posed within the size-reactivity continuum (SRC) and the microbial carbon pump (MCP) conceptual frameworks, need further empirical support. Here, we provide field evidence of the soundness of the SRC model. We sampled the high salinity core-of-flow of the Levantine Intermediate Water along its westward route through the entire Mediterranean Sea...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28719390/total-pancreatectomy-with-islet-autotransplantation-recent-updates-and-outcomes
#17
Yoshitaro Shindo, Mazhar A Kanak
PURPOSE OF REVIEW: Total pancreatectomy with islet autotransplantation (TPIAT) is a reliable therapy to retain endocrine function, to alleviate pain and improve quality of life in adult and pediatric patients suffering from refractory chronic pancreatitis and recurrent acute pancreatitis. Recently, an expansion of indications to include benign and malignant pancreatic disease has been suggested. Improved methods for evaluating the functional quality of islets and predicting transplant outcome have been discussed...
July 14, 2017: Current Opinion in Organ Transplantation
https://www.readbyqxmd.com/read/28719069/inaccuracy-of-a-continuous-arterial-pressure-waveform-monitor-when-used-for-congenital-cardiac-catheterization
#18
Michael D Seckeler, Katri Typpo, Jendar Deschenes, Ruth Higgins, Ricardo Samson, Peter Lichtenthal
OBJECTIVE: To determine the accuracy of a continuous cardiac output monitor (FloTrac sensor) for measuring cardiac index in children with congenital heart disease undergoing cardiac catheterization. Cardiac index is a critical hemodynamic parameter measured during catheterizations in children with congenital heart disease. This has been challenging to measure accurately and many clinicians rely on predictive equations for calculating cardiac index. DESIGN: Prospective, nonrandomized trial...
July 18, 2017: Congenital Heart Disease
https://www.readbyqxmd.com/read/28718297/determination-of-aerobic-capacity-via-cycle-ergometer-exercise-testing-in-alzheimer-s-disease
#19
Ulf G Bronas, Dereck Salisbury, Kaitlin Kelly, Arthur Leon, Lisa Chow, Fang Yu
BACKGROUND: Older adults with Alzheimer's disease (AD) may be unable to perform treadmill testing due to balance issues. We investigated whether older adults with AD could successfully complete a peak cycle ergometer test. METHODS: Peak oxygen consumption (peak [Formula: see text]) assessed via a cycle ergometer test in 44 participants with AD (age 78.4 ± 6.8). Physical function was assessed via the incremental shuttle walk, 6-minute walk, and the Short Physical Performance Battery (SPPB)...
January 1, 2017: American Journal of Alzheimer's Disease and Other Dementias
https://www.readbyqxmd.com/read/28717223/investigation-of-the-changes-in-the-power-distribution-in-resting-state-brain-networks-associated-with-pure-conduct-disorder
#20
Jiang Zhang, Jiansong Zhou, Fengmei Lu, Liangyin Chen, Yunzhi Huang, Huafu Chen, Yutao Xiang, Gang Yang, Zhen Yuan
Conduct disorder (CD) is a psychiatric disorder in children and adolescence. To investigate changes in the power distribution in brain networks between CD and typically developing (TD) groups, resting-state functional magnetic resonance imaging (rsfMRI) data of thirty-six subjects were first recorded, and then the data were preprocessed using DPARSF and SPM8. Meanwhile, the power of the blood oxygenation level-dependent (BOLD) signals of ninety brain regions was acquired using the integral of the Welch power spectral density (PSD)...
July 17, 2017: Scientific Reports
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