keyword
MENU ▼
Read by QxMD icon Read
search

Reactive strength

keyword
https://www.readbyqxmd.com/read/28820857/kinematic-and-neuromuscular-measures-of-intensity-during-plyometric-jumps
#1
David Cristóbal Andrade, Oscar Manzo, Ana Rosa Beltrán, Cristian Álvarez, Rodrigo Del Rio, Camilo Toledo, Jason Moran, Rodrigo Ramirez-Campillo
The aim of this study was to assess jumping performance and neuromuscular activity in lower limb muscles after drop jumps (DJ) from different drop heights (intensity) and during continuous jumping (fatigue), using markers such as reactive strength, jump height, mechanical power and surface electromyography (sEMG). The eccentric (EC) and concentric (CON) sEMG from the medial gastrocnemius (MG), biceps femoris (BF) and rectus (R) muscles were assessed during all tests. In a cross-sectional, randomized study, eleven volleyball players (age 24...
August 15, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28815856/molecular-dynamics-insights-into-polyamine-dna-binding-modes-implications-for-cross-link-selectivity
#2
Emmanuelle Bignon, Chen-Hui Chan, Christophe Morell, Antonio Monari, Jean-Luc Ravanat, Elise Dumont
Biogenic polyamines, which play a role in DNA condensation and stabilization, are ubiquitous and are found at millimolar concentration in the nucleus of eukaryotic cells. The interaction modes of three polyamines-putrescine (Put), spermine (Spm), and spermidine (Spd)-with a self-complementary 16 base pair (bp) duplex, are investigated by all-atom explicit-solvent molecular dynamics. The length of the amine aliphatic chain leads to a change of the interaction mode from minor groove binding to major groove binding...
August 16, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28814473/breaking-boundaries-optimizing-reconsolidation-based-interventions-for-strong-and-old-memories
#3
James W B Elsey, Merel Kindt
Recent research has demonstrated that consolidated memories can enter a temporary labile state after reactivation, requiring restabilization in order to persist. This process, known as reconsolidation, potentially allows for the modification and disruption of memory. Much interest in reconsolidation stems from the possibility that maladaptive memory traces-a core feature of several psychiatric conditions-could be tackled by disrupting their reconsolidation. However, research has indicated a range of supposed boundary conditions on the induction of reconsolidation...
September 2017: Learning & Memory
https://www.readbyqxmd.com/read/28814465/the-ventromedial-prefrontal-cortex-in-a-model-of-traumatic-stress-fear-inhibition-or-contextual-processing
#4
Zachary T Pennington, Austin S Anderson, Michael S Fanselow
The ventromedial prefrontal cortex (vmPFC) has consistently appeared altered in post-traumatic stress disorder (PTSD). Although the vmPFC is thought to support the extinction of learned fear responses, several findings support a broader role for this structure in the regulation of fear. To further characterize the relationship between vmPFC dysfunction and responses to traumatic stress, we examined the effects of pretraining vmPFC lesions on trauma reactivity and enhanced fear learning in a rodent model of PTSD...
September 2017: Learning & Memory
https://www.readbyqxmd.com/read/28813142/atomic-force-microscopy-infrared-spectroscopy-of-individual-atmospheric-aerosol-particles-sub-diffraction-limit-vibrational-spectroscopy-and-morphological-analysis
#5
Amy Lynne Bondy, Rachel M Kirpes, Rachel Leah Merzel, Kerri A Pratt, Mark M Banaszak Holl, Andrew P Ault
Chemical analysis of atmospheric aerosols is an analytical challenge, as aerosol particles are complex chemical mixtures that can contain hundreds to thousands of species in attoliter volumes at the most abundant sizes in the atmosphere (~100 nm). These particles have global impacts on climate and health, but there are few methods available that combine imaging and the detailed molecular information from vibrational spectroscopy for individual particles <500 nm. Herein, we show the first application of atomic force microscopy with infrared spectroscopy (AFM-IR) to detect trace organic and inorganic species and probe intraparticle chemical variation in individual particles down to 150 nm...
August 16, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28813019/grafting-modification-of-the-reactive-core-shell-particles-to-enhance-the-toughening-ability-of-polylactide
#6
Zhaokun Li, Shixin Song, Xuanchen Zhao, Xue Lv, Shulin Sun
In order to overcome the brittleness of polylactide (PLA), reactive core-shell particles (RCS) with polybutadiene as core and methyl methacrylate-co-styrene-co-glycidyl methacrylate as shell were prepared to toughen PLA. Tert-dodecyl mercaptan (TDDM) was used as chain transfer agent to modify the grafting properties (such as grafting degree, shell thickness, internal and external grafting) of the core-shell particles. The introduction of TDDM decreased the grafting degree, shell thickness and the Tg of the core phase...
August 16, 2017: Materials
https://www.readbyqxmd.com/read/28810729/thermal-stability-of-organic-monolayers-grafted-to-si-111-insights-from-reaxff-reactive-molecular-dynamics-simulations
#7
Federico A Soria, Weiwei Zhang, Adri C T van Duin, Eduardo Martin Patrito
We used the ReaxFF reactive molecular dynamics simulations to investigate the chemical mechanisms and kinetics of thermal decomposition processes of silicon surfaces grafted with different organic molecules via Si-C bonds at atomistic level. In this work, we considered the Si(111) surface grafted with n-alkyl (ethyl, propyl, pentyl and decyl) layers in 50 % coverage and Si-CH3, Si-CCCH3 and Si-CHCHCH3 layers in full coverage. Si radicals primarily formed by the homolytic cleavage of Si-C bonds play a key role in the dehydrogenation processes that lead to the decomposition of the monolayers...
August 16, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28810513/effects-of-source-and-seasonal-variations-of-natural-organic-matters-on-the-fate-and-transport-of-ceo2-nanoparticles-in-the-environment
#8
Zhen Li, Endalkachew Sahle-Demessie, Ashraf Aly Hassan, Jonathan G Pressman, George A Sorial, Changseok Han
Natural organic matter (NOM) affects the stability and transport of nanoparticles (NPs) in natural waters by modifying their physiochemical properties. Source location, and seasonal variations, influence their molecular, physical and electrical charge properties. To understand the variations of NOM on the mobilization of NPs, large volumes of water were collected from the Ohio River (OR) over winter and summer seasons and dissolved NOMs were concentrated. The chemical and structural differences of these NOMs were compared with the Suwannee River humic acid (SRHA) SRHA using (1)H and (13)C nuclear magnetic resonance spectroscopy, and Fourier transforms infrared (FTIR) spectroscopy...
August 8, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28797942/high-calcium-fly-ash-geopolymer-stabilized-lateritic-soil-and-granulated-blast-furnace-slag-blends-as-a-pavement-base-material
#9
Itthikorn Phummiphan, Suksun Horpibulsuk, Runglawan Rachan, Arul Arulrajah, Shui-Long Shen, Prinya Chindaprasirt
Granulated Blast Furnace Slag (GBFS) was used as a replacement material in marginal lateritic soil (LS) while class C Fly Ash (FA) was used as a precursor for the geopolymerization process to develop a low-carbon pavement base material at ambient temperature. Unconfined Compression Strength (UCS) tests were performed to investigate the strength development of geopolymer stabilized LS/GBFS blends. Scanning Electron Microscopy and X-ray Diffraction analysis were undertaken to examine the role of the various influencing factors on UCS development...
July 31, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28796945/rare-examples-of-fe-iv-alkyl-imide-migratory-insertions-impact-of-fe-c-covalency-in-me2ipr-fe-nad-r2-r-neo-pe-1-nor
#10
Brian P Jacobs, Peter T Wolczanski, Quan Jiang, Thomas R Cundari, Samantha N MacMillan
The iron(IV) imide complexes, (Me2IPr)R2Fe=NAd (R = (neo)Pe (3a), 1-nor (3b)) undergo migratory insertion to iron(II) amides (Me2IPr)RFe{NR(Ad)} (R = (neo)Pe (4a), 1-nor (4b)) without evidence of imidyl or free nitrene character. By increasing the field strength about iron, odd-electron reactivity was circumvented via increased covalency.
August 10, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28794619/grip-strength-as-a-frailty-diagnostic-component-in-geriatric-inpatients
#11
Joanna Dudzińska-Griszek, Karolina Szuster, Jan Szewieczek
BACKGROUND: Frailty has emerged as a key medical syndrome predictive of comorbidity, disability, institutionalization and death. As a component of the five frailty phenotype diagnostic criteria, patient grip strength deserves attention as a simple and objective measure of the frailty syndrome. The aim of this study was to assess conditions that influence grip strength in geriatric inpatients. PATIENTS AND METHODS: The study group consisted of 80 patients aged 78...
2017: Clinical Interventions in Aging
https://www.readbyqxmd.com/read/28791150/chromium-oxide-coatings-with-the-potential-for-eliminating-the-risk-of-chromium-ion-release-in-orthopaedic-implants
#12
A M Oje, A A Ogwu
Chromium oxide coatings prepared by radiofrequency reactive magnetron sputtering on stainless steel substrates were exposed to Ringer's physiological solution and tested for their electrochemical corrosion stability using an open circuit potential measurement, potentiodynamic polarization, electrochemical impedance spectroscopy and Mott-Schottky analysis. The coatings were found to be predominantly Cr2O3, based on the observation of the dominance of [Formula: see text] and Eg symmetric modes in our Raman spectroscopic investigation and the Eu vibrational modes in our Fourier transform infrared spectroscopic measurements on the coatings...
July 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/28781131/muscle-weakness-in-rheumatoid-arthritis-the-role-of-ca-2-and-free-radical-signaling
#13
REVIEW
Takashi Yamada, Maarten M Steinz, Ellinor Kenne, Johanna T Lanner
In addition to the primary symptoms arising from inflammatory processes in the joints, muscle weakness is commonly reported by patients with rheumatoid arthritis (RA). Muscle weakness not only reduces the quality of life for the affected patients, but also dramatically increases the burden on society since patients' work ability decreases. A 25-70% reduction in muscular strength has been observed in pateints with RA when compared with age-matched healthy controls. The reduction in muscle strength is often larger than what could be explained by the reduction in muscle size in patients with RA, which indicates that intracellular (intrinsic) muscle dysfunction plays an important role in the underlying mechanism of muscle weakness associated with RA...
July 26, 2017: EBioMedicine
https://www.readbyqxmd.com/read/28774054/studying-the-hydration-of-a-retarded-suspension-of-ground-granulated-blast-furnace-slag-after-reactivation
#14
Nick Schneider, Dietmar Stephan
This article presents a combined use of a retarder (d-gluconic acid) and an alkaline activator (sodium hydroxide) in a binder system based on ground granulated blast-furnace slag. The properties of the retarder are extending the dormant hydration period and suppressing the generation of strength-giving phases. Different retarder concentrations between 0.25 and 1.00 wt.% regulate the intensity and the period of the retardation and also the characteristics of the strength development. The activator concentration of 30 and 50 wt...
November 18, 2016: Materials
https://www.readbyqxmd.com/read/28772437/xps-study-on-the-stability-and-transformation-of-hydrate-and-carbonate-phases-within-mgo-systems
#15
Vanessa Rheinheimer, Cise Unluer, Jiawei Liu, Shaoqin Ruan, Jisheng Pan, Paulo J M Monteiro
MgO cements have great potential for carbon sequestration as they have the ability to carbonate and gain strength over time. The hydration of reactive MgO occurs at a similar rate as ordinary Portland cement (PC) and forms brucite (Mg(OH)₂, magnesium hydroxide), which reacts with CO₂ to form a range of hydrated magnesium carbonates (HMCs). However, the formation of HMCs within the MgO-CO₂-H₂O system depends on many factors, such as the temperature and CO₂ concentration, among others, which play an important role in determining the rate and degree of carbonation, the type and stability of the produced HMCs and the associated strength development...
January 18, 2017: Materials
https://www.readbyqxmd.com/read/28772124/proximodistal-heterogeneity-of-hippocampal-ca3-pyramidal-neuron-intrinsic-properties-connectivity-and-reactivation-during-memory-recall
#16
Qian Sun, Alaba Sotayo, Alejandro S Cazzulino, Anna M Snyder, Christine A Denny, Steven A Siegelbaum
The hippocampal CA3 region is classically viewed as a homogeneous autoassociative network critical for associative memory and pattern completion. However, recent evidence has demonstrated a striking heterogeneity along the transverse, or proximodistal, axis of CA3 in spatial encoding and memory. Here we report the presence of striking proximodistal gradients in intrinsic membrane properties and synaptic connectivity for dorsal CA3. A decreasing gradient of mossy fiber synaptic strength along the proximodistal axis is mirrored by an increasing gradient of direct synaptic excitation from entorhinal cortex...
August 2, 2017: Neuron
https://www.readbyqxmd.com/read/28767444/thrombin-induced-platelet-fibrin-clot-strength-in-relation-to-platelet-volume-indices-and-inflammatory-markers-in-patients-with-coronary-artery-disease
#17
Hai-Chen Lv, Hong-Yi Wu, Jia-Sheng Yin, Jun-Bo Ge
Platelet aggregation and inflammation are both implicated in coronary artery disease (CAD). Thrombin induced platelet-fibrin clot strength (MAThrombin) measured by thrombelastography (TEG) has been proved to be a novel marker of platelet aggregation. The aim of this study was to investigate the correlation of MAThrombin to platelet volume indices (PVIs) or to inflammatory markers in different types of CAD. 206 patients with different types of CAD were enrolled. MAThrombin, PVIs, including mean platelet volume (MPV), platelet distribution width (PDW), and platelet-large cell ratio (P-LCR) as well as inflammatory markers, including high-sensitivity C-reactive protein (hs-CRP) and fibrinogen (Fbg) were measured...
July 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28765240/proposed-core-set-of-items-for-measuring-disease-activity-in-systemic-juvenile-idiopathic-arthritis
#18
Elizaveta Limenis, Brian M Feldman, Camille Achonu, Michelle Batthish, Bianca Lang, Marjorie Mclimont, Sylvia Ota, Athimalaipet Ramanan, Rosie Scuccimarri, Nancy L Young, Rayfel Schneider
OBJECTIVE: To date, there are no standardized disease activity tools for systemic juvenile idiopathic arthritis (sJIA). We developed a core set of disease activity measures for sJIA. METHODS: We conducted a validation study in patients with sJIA recruited from 3 Canadian institutions. Disease activity scores were based on questionnaires, clinical factors, and laboratory measures. The physician's global assessment was our criterion standard. We determined the strength of association of each item with the criterion standard...
August 1, 2017: Journal of Rheumatology
https://www.readbyqxmd.com/read/28753688/the-role-of-neck-muscle-activities-on-the-risk-of-mild-traumatic-brain-injury-in-american-football
#19
Xin Jin, Zhaoying Feng, Valerie Mika, Haiyan Li, David C Viano, King H Yang
Concussion, or mild traumatic brain injury (mTBI), is frequently associated with sports activities. It has generally been accepted that neck strengthening exercises are effective as a preventive strategy for reducing sports-related concussion risks. However, the interpretation of the link between neck strength and concussion risks remains unclear. In this study, a typical helmeted head-to-head impact in American football was simulated using the head and neck complex finite element (FE) model. The impact scenario selected was previously reported in lab-controlled incident reconstructions from high-speed video footages of the National Football League using two head-neck complexes taken from Hybrid III dummies...
October 1, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/28748382/hydrogen-rich-saline-prevents-bone-loss-in-diabetic-rats-induced-by-streptozotocin
#20
Jialiang Guo, Weichong Dong, Lin Jin, Pengcheng Wang, Zhiyong Hou, Yingze Zhang
PURPOSE: As an antioxidant molecule, hydrogen has been received much more attention and reported to be used as the treatment strategy for various diseases. In this study, we hypothesize that systemic delivery of hydrogen saline water may improve the reservation of bone tissue in the tibias and femurs of osteoporotic rats caused by diabetes mellitus (DM), which is characterized by increased levels of oxidative stress and overproducing reactive oxygen species (ROS). METHODS: The animals were divided into three groups of 12 animals and lavaged with normal saline (normal control and DM), or hydrogen saline water (DM + HRS)...
July 26, 2017: International Orthopaedics
keyword
keyword
101612
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"