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Reactive strength

Jamie Douglas, Simon Pearson, Angus Ross, Mike McGuigan
The purpose of this study was to determine the braking and propulsive phase kinetic variables underpinning reactive strength in highly trained sprint athletes in comparison to a non-sprint trained control group. Twelve highly trained sprint athletes and twelve non-sprint trained participants performed drop jumps (DJs) from 0.25m, 0.50m and 0.75m onto a force plate. One familiarization session was followed by an experimental testing session within the same week. Reactive strength index (RSI), contact time, flight time, and leg stiffness were determined...
September 11, 2017: Journal of Strength and Conditioning Research
Gabriel Mazzucchelli, Thomas Holzhauser, Tanja Cirkovic-Velickovic, Araceli Diaz-Perales, Elena Molina, Paola Roncada, Pedro Rodrigues, Kitty Verhoeckx, Karin Hoffmann-Sommergruber
Food allergies are recognised as a global health concern. In order to protect allergic consumers from severe symptoms, allergenic risk assessment for well known foods and foods containing genetically modified ingredients was installed. However, population is steadily growing and there is a rising need to provide adequate protein-based foods, including novel sources, not yet used for human consumption. In this context safety issues such as a potential increased allergenic risk need to be assessed before marketing novel food sources...
September 19, 2017: Molecular Nutrition & Food Research
Benjamin T Diroll, Xuedan Ma, Yaoting Wu, Christopher B Murray
The synthesis colloidal nanocrystals in non-polar organic solvents has led to exceptional size- and shape-control, enabling the formation of nanocrystal superlattices isostructural to atomic lattices built with nanocrystals rather than atoms. The long aliphatic ligands (e.g. oleic acid) used to achieve this control separate nanocrystals too far in the solid-state for most charge-transporting devices. Solid-state ligand exchange, which brings particles closer together and enhances conductivity, necessitates large changes in the total volume of the solid (compressive stress), which leads to film cracking...
September 18, 2017: Nano Letters
Kang Liu, Qiang-Ming Li, Li-Hua Pan, Xin-Ping Qian, Hai-Lin Zhang, Xue-Qiang Zha, Jian-Ping Luo
The effects of lotus root amylopectin (LRA) on the formation of whey protein isolate (WPI) gels were investigated at the concentration range from 0 to 1.0% (w/v) by determining the texteral, thermal and rheological properties. Results exhibited these properties of WPI gels could be significantly enhanced by the addition of LRA in a concentration-dependent manner. Compared the gel with free of starch, the gel strength, water holding capacity and thermal transition temperature of WPI gel containing 1% (w/v) amylopectin were enhanced by 12...
November 1, 2017: Carbohydrate Polymers
Jing Luo, Di-Er Jin, Guo-Yan Yang, Ying-Ze Zhang, Jian-Ming Wang, Wei-Ping Kong, Qing-Wen Tao
BACKGROUND: Total glucosides of paeony (TGP) is commonly used to treat rheumatoid arthritis (RA) in China. However, clinical practice hasn't been well informed by evidence from appropriately conducted systematic reviews. This PRISMA-compliant systematic review aims at examining the effectiveness and safety of TGP for RA. METHODS: Randomized controlled trials (RCTs) comparing TGP with placebo, no treatment, or disease-modifying antirheumatic drugs (DMARDs) for patients with RA were retrieved by searching seven databases...
October 2017: Complementary Therapies in Medicine
Lisa Müller, Carolin Hildebrandt, Erich Müller, Christian Fink, Christian Raschner
Alpine ski racing is known to be a sport with a high risk of injuries. Because most studies have focused mainly on top-level athletes and on traumatic injuries, limited research exists about injury risk factors among youth ski racers. The aim of this study was to determine the intrinsic risk factors (anthropometrics, biological maturity, physical fitness, racing technique) for injury among youth alpine ski racers. Study participants were 81 youth ski racers attending a ski boarding school (50 males, 31 females; 9-14 years)...
2017: Frontiers in Physiology
Tsukasa Abe, Yuma Morimoto, Kaoru Mieda, Hideki Sugimoto, Nobutaka Fujieda, Takashi Ogura, Shinobu Itoh
Copper(II) complexes supported by N3-tridentate ligands, consisting of a rigid cyclic diamine (8-membered cyclic-diamine; L8 or 7-membered cyclic-diamine; L7) and a 2-(2-pyridyl)ethyl (-CH2CH2Py) group, were synthesized and structurally characterized. Reaction of the copper(II) complexes and cumene hydroperoxide (CmOOH) in the presence of triethylamine in CH3CN gave the corresponding cumylperoxide complexes L8Cu(II)OOCm and L7Cu(II)OOCm. The UV-vis and EPR spectra suggested that L8Cu(II)OOCm takes a tetrahedrally distorted structure, whereas L7Cu(II)OOCm has a planar geometry in solution...
September 1, 2017: Journal of Inorganic Biochemistry
Ryan C Cammarota, Matthew V Vollmer, Jing Xie, Jingyun Ye, John C Linehan, Samantha A Burgess, Aaron M Appel, Laura Gagliardi, Connie C Lu
Large-scale CO2 hydrogenation could offer a renewable stream of industrially important C1 chemicals while reducing CO2 emissions. Critical to this opportunity is the requirement for inexpensive catalysts based on earth-abundant metals instead of precious metals. We report a nickel-gallium complex featuring a Ni(0)→Ga(III) bond that shows remarkable catalytic activity for hydrogenating CO2 to formate at ambient temperature (3150 turnovers, turnover frequency = 9700 h(-1)), compared with prior homogeneous Ni-centered catalysts...
September 12, 2017: Journal of the American Chemical Society
Hilary Afeseh Ngwa, Muhammet Ay, Huajun Jin, Vellareddy Anantharam, Arthi Kanthasamy, Anumantha G Kanthasamy
Vanadium (V) is a transition metal that presents in multiple oxidation states and numerous inorganic compounds and is also an ultra-trace element considered to be essential for most living organisms. Despite being one of the lightest metals, V offers high structural strength and good corrosion resistance and thus has been widely adopted for high-strength steel manufacturing. High doses of V exposure are toxic, and inhalation exposure to V adversely affects the respiratory system. The neurotoxicological properties of V are just beginning to be identified...
2017: Advances in Neurobiology
C C Abreu, L F M F Cardozo, M B Stockler-Pinto, M Esgalhado, J E Barboza, R Frauches, D Mafra
Studies have shown that nuclear factor erythroid 2-related factor 2 (Nrf2) can be modulated by physical exercise. However, the impact of resistance exercise has never been investigated in patients with chronic kidney disease (CKD). The aim of this study was to evaluate the effects of resistance exercise programs on the expression of transcription factors Nrf2 and nuclear factor κB (NF-κB) in CKD patients on hemodialysis (HD). Patients on an HD program were randomly assigned to an exercise group of 25 patients (54...
September 5, 2017: Life Sciences
Alaina Wodzinski, Jason J Bendezú, Martha E Wadsworth
BACKGROUND AND OBJECTIVES: Developmental theorists posit that temperament contributes to preadolescent's stress response styles. Findings from empirical studies, however, have yielded mixed results, thus indicating a need to consider moderators of this relation. Utilizing an analytic framework guided by resiliency theory [Zimmerman, M. A. (2013). Resiliency theory: A strengths-based approach to research and practice for adolescent health. Health Education & Behavior, 40, 381-383], this study examined achievement goal orientation as a moderator of the relation between temperament and stress response styles...
September 7, 2017: Anxiety, Stress, and Coping
Edvin Lundgren, Chu Zhang, Lindsay R Merte, Mikhail Shipilin, Sara Blomberg, Uta Hejral, Jianfeng Zhou, Johan Zetterberg, Johan Gustafson
Motivated mainly by catalysis, gas-surface interaction between single crystal surfaces and molecules has been studied for decades. Most of these studies have been performed in well-controlled environments and have been instrumental for the present day understanding of catalysis, providing information on surface structures, adsorption sites, and adsorption and desorption energies relevant for catalysis. However, the approach has been criticized for being too far from a catalyst operating under industrial conditions at high temperatures and pressures...
September 7, 2017: Accounts of Chemical Research
Colin Joseph McNeece, Marc A Hesse
Salinity is an increasingly prescient issue in reactive transport, from low salinity water flooding to fracking brine leakage. Of primary concern is the effect of salinity on surface chemistry. Transport and batch experiments show a strong coupling of salinity and acidity through chemical interactions at the mineral-liquid interface. This coupling is ascribed to the combined effects of ionic strength on electrostatic behaviour of the interface and competitive sorption between protons and other cations for binding sites on the surface...
September 6, 2017: Environmental Science & Technology
Prakash M Gopalakrishnan Nair, Ill Min Chung
Rapid growth of nanotechnology has enabled the production and use of engineered nanoparticles (ENPs) in several industries as well as in agriculture areas. This has raised ecotoxicological concerns due to the release of ENPs to the environment. In the present study, we investigated the effects of interactions of copper oxide nanoparticles (CuO NPs) on physiological, biochemical, and molecular indices in seedlings of an important oil seed crop Brassica napus L. The seedlings were treated with 0, 20, 50, 100, 200, 400, and 500 mg/L of CuO NPs for 14 days in half-strength semi-solid Murashige and Skoog medium...
October 2017: 3 Biotech
Chunxia Gao, Huiling Liu, Zong-Ping Luo, Sajilafu, Huilin Yang, Lei Yang
To meet the requirements of minimally invasive surgical treatments for osteoporotic vertebral compression fracture, various strategies have been proposed to enhance the properties of calcium phosphate cement (CPC). Here, a new strategy was developed by incorporating poly (γ-glutamic acid) (γ-PGA) and its strontium salt into the formulation of alpha tricalcium phosphate (α-TCP)-based CPC. Effects of γ-PGA on the injectability, cohesion, setting times, mechanical compressive strengths and cytocompatibility were systematically studied...
November 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
P Kurian, T O Obisesan, T J A Craddock
Oxidative stress is a pathological hallmark of neurodegenerative tauopathic disorders such as Alzheimer's disease and Parkinson's disease-related dementia, which are characterized by altered forms of the microtubule-associated protein (MAP) tau. MAP tau is a key protein in stabilizing the microtubule architecture that regulates neuron morphology and synaptic strength. When MAP tau is degraded in tauopathic disorders, neuron dysfunction results. The precise role of reactive oxygen species (ROS) in the tauopathic disease process, however, is poorly understood...
October 2017: Journal of Photochemistry and Photobiology. B, Biology
Indrani Datta, Naini Bhadri, Pradnya Shahani, Debanjana Majumdar, Sowmithra Sowmithra, Rema Razdan, Ramesh Bhonde
Diabetic neuropathy (DN) is among the most debilitating complications of diabetes. Here, we investigated the effects of human dental pulp stem cell (DPSC) transplantation in Streptozotocin (STZ)-induced neuropathic rats. Six weeks after STZ injection, DPSCs were transplanted through two routes, intravenous (IV) or intramuscular (IM), in single or two repeat doses. Two weeks after transplantation, a significant improvement in hyperalgesia, grip-strength, motor coordination and nerve conduction velocity was observed in comparison with controls...
August 29, 2017: Cytotherapy
Hee-Ok Kim, Jae-Ho Cho
Post-thymic naïve T cells constitute a key cellular arm of adaptive immunity, with a well-known characteristic of the specificity and robustness of responses to cognate foreign antigens which is presented as a form of antigen-derived peptides bound to major histocompatibility complex (MHC) molecules by antigen-presenting cells (APCs). In a steady state, however, these cells are resting, quiescent in their activity, but must keep full ranges of functional integrity to mount rapid and robust immunity to cope with various infectious pathogens at any time and space...
August 2017: Immune Network
Emanuela Tudorache, Ariadna Petronela Fildan, Mirela Frandes, Elena Dantes, Doina Ecaterina Tofolean
INTRODUCTION: People with COPD have a decline in functional status, but little is known about the rate of decline and factors that contribute. Of particular concern is the decline in cognitive and functional performance. Decrease in cognitive and functional performance will finally lead to decreased health status, sedentary life style and premature frailty. AIM: The aim of this study is to compare functional performance and cognitive status in patients with COPD of different ages and to examine the changes in extrapulmonary effects...
2017: Clinical Interventions in Aging
Magda Babina, Sven Guhl, Metin Artuc, Torsten Zuberbier
While allergic mast cell (MC) degranulation occurs by FcεRI-aggregation and varies in strength among subjects, the analogous pseudo-allergic route was recently uncovered to proceed via MRGPRX2. Here, we examine inter-individual variability in skin MC responses to FcεRI-triggering versus those evoked by MRGPRX2. While population-based variability is comparable between the routes, FcεRI- and MRGPRX2-stimulated pathways are completely independent from each other, and responsiveness to one has therefore no predictive value for the other...
August 31, 2017: Allergy
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