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https://www.readbyqxmd.com/read/28634456/absolute-and-relative-training-load-and-its-relation-to-fatigue-in-football
#1
Unai Zurutuza, Julen Castellano, Ibon Echeazarra, David Casamichana
The aim of the study was to assess the relationship of external and internal training load (TL) indicators with the objective and subjective fatigue experienced by 15 semi-professional football players, over eight complete weeks of the competition period in the 2015-2016 season, which covered microcycles from 34th to 41st. The maximum heart rate (HRmax) and maximum speed (Vmax) of all the players were previously measured in specific tests. The TL was monitored via questionnaires on rating of perceived exertion (RPE), pulsometers and GPS devices, registering the variables: total distance (TD), player load 2D (PL2D), TD at >80% of the Vmax (TD80), TD in deceleration at < -2 m⋅sec-2 (TDD <-2), TD in acceleration >2 m⋅sec(-2) (TDA >2), Edwards (ED), time spent at between 50 and 80% (50-80% HRmax), 80-90% (80-90% HRmax), and >90% of the HRmax (>90% HRmax), and RPE both respiratory/thoracic (RPEres) and leg/muscular (RPEmus)...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28633100/improving-the-accuracy-of-hyaluronic-acid-molecular-weight-estimation-by-conventional-size-exclusion-chromatography
#2
Sreeja Shanmuga Doss, Nirav Pravinbhai Bhatt, Guhan Jayaraman
There is an unreasonably high variation in the literature reports on molecular weight of hyaluronic acid (HA) estimated using conventional size exclusion chromatography (SEC). This variation is most likely due to errors in estimation. Working with commercially available HA molecular weight standards, this work examines the extent of error in molecular weight estimation due to two factors: use of non-HA based calibration and concentration of sample injected into the SEC column. We develop a multivariate regression correlation to correct for concentration effect...
June 8, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28632137/electrospun-silk-polyaniline-conduits-for-functional-nerve-regeneration-in-rat-sciatic-nerve-injury-model
#3
Suradip Das, Manav Sharma, Dhiren Saharia, Kushal Sarma, Elizabeth Muir, Utpal Bora
The present study describes the fabrication of polyaniline-silk fibroin nanocomposite based nerve conduits and its subsequent implantation in a rat sciatic nerve injury model for peripheral nerve regeneration. This is the first in vivo study of polyaniline based nerve conduit describing the safety and efficacy of the conduits in treating peripheral nerve injuries. The nanocomposite was synthesised by electrospinning a mixture of silk fibroin protein and polyaniline wherein the silk nanofibers were observed to be uniformly coated with polyaniline nanoparticles...
June 20, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/28630581/5000-meter-run-performance-is-not-enhanced-24-hrs-after-an-intense-exercise-bout-and-cold-water-immersion
#4
Mary C Stenson, Matthew R Stenson, Tracey D Matthews, Vincent J Paolone
Cold water immersion (CWI) is used by endurance athletes to speed recovery between exercise bouts, but little evidence is available on the effects of CWI on subsequent endurance performance. The purpose of this study was to investigate the effects of CWI following an acute bout of interval training on 5000 m run performance 24 hrs after interval training, perceived muscle soreness (PMS), range of motion (ROM), thigh circumference (TC), and perceived exertion (RPE). Nine endurance-trained males completed 2 trials, each consisting of an interval training session of 8 repetitions of 1200 m at a running pace equal to 75% of VO2peak, either a control or CWI treatment, and a timed 5000 m run 24 hrs post interval training session...
June 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28630580/the-effect-of-upper-body-anaerobic-pre-loading-on-2000-m-ergometer-rowing-performance-in-college-level-male-rowers
#5
Priit Purge, Peter Hofmann, Rait Merisaar, Alexander Mueller, Gerhard Tschakert, Jarek Mäestu, Jaak Jürimäe
Elevated blood lactate has been shown to influence subsequent anaerobic exercise due to an inhibition of glycolysis. The aim of the present study was therefore to investigate the influence of a short and high-intensity anaerobic arm crank pre-load exercise (HIE) added to a low-intensity warm-up on cardio-respiratory and metabolic responses on a subsequent all out rowing exercise. Nine well-trained college level male rowers (24.6 ± 7.1 yrs; 1.87 ± 0.07 m; 88.9 ± 9.8 kg; 18.5 ± 3.7% body fat) volunteered to participate in the study...
June 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28630069/degradation-of-incretins-and-modulation-of-blood-glucose-levels-by-periodontopathic-bacterial-dipeptidyl-peptidase-4
#6
Yuko Ohara-Nemoto, Manami Nakasato, Yu Shimoyama, Tomomi T Baba, Takeshi Kobayakawa, Toshio Ono, Takashi Yaegashi, Shigenobu Kimura, Takayuki K Nemoto
Severe periodontitis is known to aggravate diabetes mellitus, though molecular events related to that link have not been fully elucidated. Porphyromonas gingivalis, a major pathogen of periodontitis, expresses dipeptidyl peptidase 4 (DPP4), which is involved in regulation of blood glucose levels by cleaving incretins in humans. We examined the enzymatic characteristics of DPP4 from P. gingivalis as well as two other periodontopathic bacteria, Tannerella forsythia and Prevotella intermedia, and determined whether it is capable of regulating blood glucose levels...
June 19, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28628552/a-case-study-of-high-velocity-persistent-geotropic-nystagmus-is-this-bppv
#7
Michael C Schubert, Pamela M Dunlap, Susan L Whitney
BACKGROUND AND PURPOSE: Deciphering the cause for a persistent, direction-changing geotropic nystagmus can be difficult. Migraine and light cupula are two possible causes, though can be confused with benign paroxysmal positional vertigo (BPPV) affecting the horizontal semicircular canal. In migraine, the persistent geotropic nystagmus tends to be slow; in light cupula, the nystagmus has been illustrated to beat in the direction opposite that of prone positioning. CASE DESCRIPTION: Here we describe a patient with initial occurrence then recurrence of a high velocity (≥30 deg/sec), persistent direction-changing geotropic nystagmus and vertigo with an intensity variable based on head position, which was difficult to manage...
July 2017: Journal of Neurologic Physical Therapy: JNPT
https://www.readbyqxmd.com/read/28627464/analysis-of-protein-complexes-in-arabidopsis-leaves-using-size-exclusion-chromatography-and-label-free-protein-correlation-profiling
#8
Uma K Aryal, Zachary McBride, Donglai Chen, Jun Xie, Daniel B Szymanski
Protein complexes are fundamentally important for diverse cellular functions, and create functionalities that could never be achieved by a single polypeptide. Knowledge of the protein complex assemblies that exist in plant cells are limited. To close this gap, we applied an integrative proteomic approach that combines cell fractionation, protein chromatography and quantitative mass spectrometry (MS) to analyze the oligomerization state of thousands of proteins in a single experiment. Soluble extracts from intact Arabidopsis leaves were fractionated using size exclusion chromatography (SEC), and abundance profiles across the column fractions were quantified using label-free precursor ion (MS1) intensity...
June 13, 2017: Journal of Proteomics
https://www.readbyqxmd.com/read/28625929/verification-of-a-novel-atrial-fibrillation-cryoablation-dosing-algorithm-guided-by-time-to-pulmonary-vein-isolation-results-from-the-cryo-dosing-study-cryoballoon-ablation-dosing-based-on-the-assessment-of-time-to-effect-and-pulmonary-vein-isolation-guidance
#9
Arash Aryana, David N Kenigsberg, Marcin Kowalski, Charles H Koo, Hae W Lim, Padraig Gearoid O'Neill, Mark R Bowers, Robert B Hokanson, Kenneth A Ellenbogen
BACKGROUND: There are no recommendations on the optimal dosing for cryoablation of atrial fibrillation (Cryo-AF). OBJECTIVE: We developed and prospectively tested a Cryo-AF dosing protocol guided exclusively by time-to-pulmonary vein (PV) isolation (TT-PVI) in patients undergoing a first-time Cryo-AF. METHODS: In this multicenter study, we examined the acute/long-term safety/efficacy of Cryo-AF using the proposed dosing algorithm (Cryo-AFDosing, n=355) against a conventional, non-standardized approach (Cryo-AFConventional, n=400) in a non-randomized fashion...
June 15, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28625790/preprotein-conformational-dynamics-drive-bivalent-translocase-docking-and-secretion
#10
Marios Frantzeskos Sardis, Alexandra Tsirigotaki, Katerina Elias Chatzi, Athina George Portaliou, Giorgos Gouridis, Spyridoula Karamanou, Anastassios Economou
Most bacterial secretory proteins destined beyond the plasma membrane are secreted post-translationally by the Sec translocase. In the first step of translocation, preproteins are targeted for binding to their 2-site receptor SecA, the peripheral ATPase subunit of the translocase. We now reveal that secretory preproteins use a dual-key mechanism to bridge the signal peptide and mature domain receptor sites and cooperatively enhance their affinities. Docking of targeting-competent mature domains requires that their extensive disorder is finely tuned...
June 5, 2017: Structure
https://www.readbyqxmd.com/read/28625397/quantitative-evaluation-of-heartbeat-interval-time-series-using-poincar%C3%A3-analysis-reveals-distinct-patterns-of-heart-rate-dynamics-during-cycles-of-vagus-nerve-stimulation-in-patients-with-heart-failure
#11
Imad Libbus, Bruce D Nearing, Badri Amurthur, Bruce H KenKnight, Richard L Verrier
BACKGROUND: Optimization of stimulation parameters is essential to maximizing therapeutic efficacy and minimizing side effects. METHODS: The ANTHEM-HF study enrolled patients with heart failure who received chronic autonomic regulation therapy (ART) with an implantable vagus nerve stimulation (VNS) system on either the right (n=30) or left side (n=29). Acute effects of continuously cycling VNS on R-R interval dynamics were evaluated using post hoc Poincaré analysis of ECG recordings collected during multiple titration sessions over an 8-12week period...
June 8, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28623631/effect-of-in-vitro-enzymatic-degradation-on-3d-printed-poly-%C3%AE%C2%B5-caprolactone-scaffolds-morphological-chemical-and-mechanical-properties
#12
Joana Ferreira, Antonio Gloria, Stefania Cometa, Jorge F J Coelho, Marco Domingos
BACKGROUND: In recent years, the tissue engineering (TE) field has significantly benefited from advanced techniques such as additive manufacturing (AM), for the design of customized 3D scaffolds with the aim of guided tissue repair. Among the wide range of materials available to biomanufacture 3D scaffolds, poly(ε-caprolactone) (PCL) clearly arises as the synthetic polymer with the greatest potential, due to its unique properties - namely, biocompatibility, biodegradability, thermal and chemical stability and processability...
June 15, 2017: Journal of Applied Biomaterials & Functional Materials
https://www.readbyqxmd.com/read/28622024/comparison-of-radiation-exposure-from-fixed-table-fluoroscopy-to-a-portable-c-arm-during-ureteroscopy
#13
Fernando Cabrera, Richard Shin, Kyle Waisanen, Giao Nguyen, Charles D Scales, Michael N Ferrandino, Glenn M Preminger, Terry T Yoshizumi, Michael Eric Lipkin
INTRODUCTION: Fluoroscopy is widely used during endourologic procedures and is associated with treatment required radiation exposure. Our objective was to estimate patient radiation exposure during fluoroscopy with either a fixed table or portable C-arm using a validated anthropomorphic adult male model. MATERIALS AND METHODS: A validated male anthropomorphic model was placed supine on both a cystoscopy operating room table and a fixed fluoroscopy table unit. Metal oxide semiconductor field effect transistor dosimeters were placed at 20 organ-specific locations in the model to measure organ specific dosages...
June 16, 2017: Journal of Endourology
https://www.readbyqxmd.com/read/28621350/photoinduced-structural-distortions-and-singlet-triplet-intersystem-crossing-in-cu-i-mlct-excited-states-monitored-by-optically-gated-fluorescence-spectroscopy
#14
Sofia Garakyaraghi, Petr Koutnik, Felix N Castellano
Copper(i) phenanthroline complexes represent viable earth-abundant alternatives to the ubiquitous Ru(ii) tris-bipyridine photosensitizers owing to their similar metal-to-ligand charge transfer (MLCT) properties. A well-established complication of Cu(i) phenanthroline complexes is that they can undergo significant photo-induced structural rearrangements, leading to excited states that are highly susceptible to exciplex formation and short-lived. In this work, a comprehensive analysis of the photo-induced structural distortions and singlet-triplet intersystem crossing dynamics of a series of four sterically encumbered Cu(i) phenanthroline chromophores has been conducted, namely, [Cu(dsbp)2](+) (dsbp = 2,9-di-sec-butyl-1,10-phenanthroline), [Cu(dsbtmp)2](+) (dsbtmp = 2,9-di-sec-butyl-3,4,7,8-tetramethyl-1,10-phenanthroline), [Cu(dipp)2](+) (dipp = 2,9-di-isopropyl-1,10-phenanthroline), and [Cu(diptmp)2](+) (diptmp = 2,9-di-isopropyl-3,4,7,8-tetramethyl-1,10-phenanthroline)...
June 16, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28620873/cytotoxic-acylphloroglucinol-derivatives-from-callistemon-salignus
#15
Xu-Jie Qin, Tong Shu, Qian Yu, Huan Yan, Wei Ni, Lin-Kun An, Pan-Pan Li, Yin-E Zhi, Afsar Khan, Hai-Yang Liu
Callisalignenes G-I (1-3), three new meroterpenoids of β-triketone and monoterpene, along with two known analogues (4 and 5), were isolated from Callistemon salignus. Their structures and absolute configurations were unambiguously established by a combination of NMR and MS analysis and electronic circular dichroism (ECD) evidence. Callisalignenes H (2) and I (3) have a rare sec-butyl moiety at C-7. Meroterpenoids 1-3 exhibited cytotoxicity against HCT116 cells with IC50 values of 8.51 ± 1.8, 9.12 ± 0...
June 15, 2017: Natural Products and Bioprospecting
https://www.readbyqxmd.com/read/28619616/activity-independent-screening-of-secreted-proteins-using-split-gfp
#16
Andreas Knapp, Myriam Ripphahn, Kristina Volkenborn, Pia Skoczinski, Karl-Erich Jaeger
The large-scale industrial production of proteins requires efficient secretion, as provided, for instance, by the Sec system of Gram-positive bacteria. Protein engineering approaches to optimize secretion often require the screening of large libraries, e.g. comprising a target protein fused to many different signal peptides. Respective high-throughput screening methods are usually based on photometric or fluorimetric assays enabling fast and simple determination of enzymatic activities. Here, we report on an alternative method for quantification of secreted proteins based on the split GFP assay...
June 12, 2017: Journal of Biotechnology
https://www.readbyqxmd.com/read/28619510/crystal-structure-of-brlr-with-c-di-gmp
#17
Harikiran Raju, Rohan Sharma
The transcriptional regulator BrlR is a member of the MerR family of multidrug transport activators in Pseudomonas aeruginosa. Recent study indicates that BrlR is a novel 3',5'-cyclic diguanylic acid (c-di-GMP) receptor and can be activated by c-di- GMP. To gain insight into BrlR function, we determined the structure of BrlR with c-di-GMP complex structure to 2.5 Å. The structure and SEC data revealed BrlR forms a tetramer and each BrlR protomer consists of three parts, DNA-binding domain, a coiled-coil region and GyrI-like domain...
June 12, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28615341/high-frequency-epidural-stimulation-across-the-respiratory-cycle-evokes-phrenic-short-term-potentiation-after-incomplete-cervical-spinal-cord-injury
#18
Elisa J Gonzalez-Rothi, Kristi A Streeter, Marie H Hanna, Anna C Stamas, Paul J Reier, David M Baekey, David D Fuller
C2 spinal hemilesion (C2Hx) paralyzes the ipsilateral diaphragm, but recovery is possible through activation of "crossed spinal" synaptic inputs to ipsilateral phrenic motoneurons. We tested the hypothesis that high frequency epidural stimulation (HF-ES) would potentiate ipsilateral phrenic output after subacute and chronic C2Hx. HF-ES (300 Hz) was applied to the ventrolateral C4 or T2 spinal cord ipsilateral to C2Hx in anesthetized and mechanically ventilated adult rats. Stimulus duration was 60-sec and currents ranged from 100-1000 µA...
June 14, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28612903/the-value-of-left-atrial-strain-and-strain-rate-in-predicting-left-atrial-appendage-stasis-in-patients-with-nonvalvular-atrial-fibrillation
#19
Mengruo Zhu, Man Wang, Xinxin Ma, Dongyan Zheng, Yueli Zhang
BACKGROUND: This study aimed to investigate the value of left atrial (LA) strain and strain rate (S/SR) by transthoracic echocardiography (TTE) in predicting left atrial appendage (LAA) stasis, in order to find a way for LAA stasis screening which is easily performed in patients with nonvalvular atrial fibrillation (NVAF). METHODS: One hundred and thirty NVAF patients prepared for AF ablation were enrolled. TTE and transesophageal echocardiography (TEE) were performed in all patients...
June 14, 2017: Cardiology Journal
https://www.readbyqxmd.com/read/28612252/james-p-stannard-andrew-h-schmidt-surgical-treatment-of-orthopedic-trauma-a-comprehensive-text-and-video-guide-thieme-2016-sec-ed-1-152-p-hardcover-339-99-eur-d-349-60-eur-a-391-00-chf-isbn-978-1-60406-762-0
#20
Pierre Kehr, Alain G Graftiaux
No abstract text is available yet for this article.
June 13, 2017: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
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