64,663 results match your criteria strength control

Effects of Short- and Long-Term Aerobic-Strength Training and Determinants of Walking Speed in the Elderly.

Gerontology 2021 May 10:1-11. Epub 2021 May 10.

Biomedical Research Center, Institute of Experimental Endocrinology, Slovak Academy of Sciences, University Science, Park for Biomedicine, Bratislava, Slovakia.

Background/aims: Walking speed (WS) is an objective measure of physical capacity and a modifiable risk factor of morbidity and mortality in the elderly. In this study, we (i) determined effects of 3-month supervised aerobic-strength training on WS, muscle strength, and habitual physical activity; (ii) evaluated capacity of long-term (21 months) training to sustain higher WS; and (iii) identified determinants of WS in the elderly.

Methods: Volunteers (F 48/M 14, 68. Read More

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Automatic magnetic projection for one-step separation of mixed plastics using ring magnets.

Sci Total Environ 2021 Apr 21;786:147217. Epub 2021 Apr 21.

State Key Lab of Fluid Power Transmission and Control, School of Mechanical Engineering, Zhejiang University, Hangzhou, China; Key Laboratory of 3D Printing Process and Equipment of Zhejiang Province, School of Mechanical Engineering, Zhejiang University, Hangzhou, China; Jiangsu Jianghuai Magnetic Industry Co., Ltd., Xuyi 211700, China. Electronic address:

Magnetic projection, a novel separation method proposed recently, can separate multiple mixed materials in an efficient and low-cost way. Although promising, existing magnetic projection method cannot achieve the automatic feeding of mixed materials, which limits its applications. To address this challenge, ring magnets were used to replace conventional square magnets in this research. Read More

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How much leeway is there to relax COVID-19 control measures?

Epidemics 2021 Mar 18;35:100453. Epub 2021 Mar 18.

Department of Mathematics, Simon Fraser University, Burnaby, BC, Canada; Department of Mathematics, Imperial College London, London, UK. Electronic address:

Following successful non-pharmaceutical interventions (NPI) aiming to control COVID-19, many jurisdictions reopened their economies and borders. As little immunity had developed in most populations, re-establishing higher contact carried substantial risks, and therefore many locations began to see resurgence in COVID-19 cases. We present a Bayesian method to estimate the leeway to reopen, or alternatively the strength of change required to re-establish COVID-19 control, in a range of jurisdictions experiencing different COVID-19 epidemics. Read More

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Quantum parameter analysis of the adsorption mechanism by freshly formed ferric hydroxide for synthetic dye and antibiotic wastewaters.

Chemosphere 2021 Apr 16;280:130577. Epub 2021 Apr 16.

School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, China; Department of Developmental and Behavioral Pediatrics, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, 200127, PR China. Electronic address:

In this study, the adsorption effect by freshly formed ferric hydroxide (FFFH) for the removal of 47 synthetic dye and antibiotic wastewaters under different pH conditions (i.e., pH = 4, 7, and 10) was investigated. Read More

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Exploring lipid-dependent conformations of membrane-bound α-synuclein with the VDAC nanopore.

Biochim Biophys Acta Biomembr 2021 May 7:183643. Epub 2021 May 7.

Section on Molecular Transport, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892, USA.

Regulation of VDAC by α-Synuclein (αSyn) is a rich and instructive example of protein-protein interactions catalyzed by a lipid membrane surface. αSyn, a peripheral membrane protein involved in Parkinson's disease pathology, is known to bind to membranes in a transient manner. αSyn's negatively charged C-terminal domain is then available to be electromechanically trapped by the VDAC β-barrel, a process that is observed in vitro as the reversible reduction of ion flow through a single voltage-biased VDAC nanopore. Read More

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Effectiveness of orthodontic toothbrush versus conventional toothbrush on plaque and gingival index reduction: a systematic review and meta-analysis.

Int J Dent Hyg 2021 May 10. Epub 2021 May 10.

Department of Dentistry, Centro Universitário Christus, Fortaleza, Ceará, Brazil.

Objective: In orthodontic patients submitted to oral hygiene instruction, what is the efficacy of orthodontic toothbrush (O-TB) versus conventional toothbrush (C-TB) on plaque and gingival index reduction in randomized and nonrandomized controlled clinical trials?

Methods: Electronic database search was performed on: PubMed, ClinicalTrials.gov, Cochrane Library, and Google Scholar. Database research, study selection, data extraction and ROBINS-I and Risk of Bias Tool 2. Read More

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In Vivo Magnetic Resonance Spectroscopy of Hyperpolarized [1- C]Pyruvate and Proton Density Fat Fraction in a Guinea Pig Model of Non-Alcoholic Fatty Liver Disease Development After Life-Long Western Diet Consumption.

J Magn Reson Imaging 2021 May 10. Epub 2021 May 10.

Department of Medical Biophysics, Western University, London, Ontario, Canada.

Background: Alterations in glycolysis are central to the increasing incidence of non-alcoholic fatty liver disease (NAFLD), highlighting a need for in vivo, non-invasive technologies to understand the development of hepatic metabolic aberrations.

Purpose: To use hyperpolarized magnetic resonance spectroscopy (MRS) and proton density fat fraction (PDFF) magnetic resonance imaging (MRI) techniques to investigate the effects of a chronic, life-long exposure to the Western diet (WD) in an animal model resulting in NAFLD; to investigate the hypothesis that exposure to the WD will result in NAFLD in association with altered pyruvate metabolism.

Study Type: Prospective. Read More

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Does a Recumbent Lateral Stability Trainer Improve Balance Scores Among Older Adults Within 4 Weeks?

Perm J 2021 May;25

College of Saint Mary, Omaha, NE.

Backgroud: Past literature has shown that balance and strength are important in preventing falls, but few studies have focused on developing strength and power in a lateral plane. The purpose of this study was to determine if a lateral pedal recumbent training device can improve balance scores among older adults in 4 weeks.

Methods: A 2-group experimental-control multivariate design (43 women, 13 men; age, 77. Read More

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Comparison of posterior indirect adhesive restorations (PIAR) with different preparation designs according to the adhesthetics classification. Part 1: Effects on the fracture resistance.

Int J Esthet Dent 2021 May;16(2):144-167

Aim: To investigate whether: 1) in the adhesive era, a full-crown restoration in a molar tooth is more resistant compared with an overlay-type restoration; b) a posterior indirect adhesive restoration (PIAR) is similar to a sound tooth from a mechanical point of view.

Materials And Methods: Seventy extracted molars were divided into five groups (1. Butt Joint; 2. Read More

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Quadriceps strength asymmetry as predictor of ankle sprain in male volleyball players.

J Sports Med Phys Fitness 2021 May 10. Epub 2021 May 10.

Faculty of Sport, University of Ljubljana, Ljubljana, Slovenia.

Background: Ankle sprain is the most common acute time-loss injury in volleyball and occurs mainly during landing from a jump. Therefore we have evaluated the role of quadriceps strength and countermovement jump height on ankle sprain occurrence, as these intrinsic modifiable risk factors were not yet evaluated. We have also hypothesised that presence of quadriceps strength asymmetry could be a possible risk factor for ankle sprains in male volleyball players. Read More

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Skeletal Muscle Cellular Contractile Dysfunction After Anterior Cruciate Ligament Reconstruction Contributes to Quadriceps Weakness at Six-Month Follow-Up.

J Orthop Res 2021 May 10. Epub 2021 May 10.

Departments of Rehabilitation, Orthopaedics and Rehabilitation, University of Vermont, Burlington, VT, USA.

Muscle dysfunction following anterior cruciate ligament reconstruction (ACLR) may evolve from alterations in muscle contractility at the myofilament protein level. Using a prospective, within-subject case control design, we evaluated cellular-level contractility, cross-sectional area (CSA), and myosin heavy chain (MHC) isoform expression on single muscle fibers 3-weeks post ACLR, and evaluated their relationship to whole muscle strength and patient-oriented outcomes 6 months post-op. Biopsies of the vastus lateralis were performed 3-weeks post-ACLR in 11 subjects (5 female, mean age ±SD = 24. Read More

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Vestibulo-perceptual influences upon the vestibulo-spinal reflex.

Exp Brain Res 2021 May 9. Epub 2021 May 9.

Neuro-Otology Unit, Department of Brain Sciences, Charing Cross Hospital Campus, Imperial College London, Fulham Palace Road, London, W6 8RF, UK.

The vestibular system facilitates gaze and postural stability via the vestibulo-ocular (VOR) and vestibulo-spinal reflexes, respectively. Cortical and perceptual mechanisms can modulate long-duration VOR responses, but little is known about whether high-order neural phenomena can modulate short-latency vestibulo-spinal responses. Here, we investigate this by assessing click-evoked cervical vestibular myogenic-evoked potentials (VEMPS) during visual roll motion that elicited an illusionary sensation of self-motion (i. Read More

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New approach for localization and smart data transmission inside underground mine environment.

SN Appl Sci 2021 1;3(6):604. Epub 2021 May 1.

Department of Mining Engineering, Indian Institute of Engineering, Science & Technology, Shibpur, West Bengal India 711103.

This paper presents an approach to access real time data from underground mine. Two advance technologies are presented that can improve the adverse environmental effect of underground mine. Visible light communication (VLC) technology is incorporated to estimate the location of miners inside the mine. Read More

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Investigation of the , and Mutations and Polymorphisms in Iranian Infertile Women with Polycystic Ovary Syndrome (PCOS).

Rep Biochem Mol Biol 2021 Jan;9(4):470-477

Vali-e-Asr Reproductive Health Research center, Tehran University of Medical Sciences, Tehran, Iran.

Background: Polycystic ovary syndrome (PCOS) is the most common cause of ovarian dysfunction associated with infertility, Oligomenorrhea or amenorrhea, hirsutism, acne, and obesity. A large body of evidence unraveled, three major groups of genes play critical roles in underlying PCOS molecular mechanism. The aim of this study is to investigate critical exonic variant of , and and determine the functionality of these mutations in Iranian patients with PCOS. Read More

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January 2021

Effectiveness of a Community-Based Muscle Strengthening Exercise Program to Increase Muscle Strength Among Pre-frail Older Persons in Malaysia: A Pilot Study.

Front Public Health 2021 21;9:610184. Epub 2021 Apr 21.

Department of Community Health, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Serdang, Malaysia.

Deterioration in muscle mass and muscle strength is common among the frail older persons, cause functional dependence and decrease in the quality of life. Therefore, the identification of cost-effective interventions to prevent or ameliorate frailty is crucially needed. The aim of this study is to determine the effectiveness of a Community-based Muscle Strengthening Exercise (COME) program to increase muscle strength among pre-frail older persons. Read More

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Production of bioconcrete with improved durability properties using Alkaliphilic Egyptian bacteria.

3 Biotech 2021 May 22;11(5):231. Epub 2021 Apr 22.

Department of Industrial Biotechnology, Genetic Engineering and Biotechnology Research Institute (GEBRI), University of Sadat City, Sadat, 22857/79 Egypt.

Microbial-based self-healing of concrete represents innovative technology for improving micro-crack sealing. Microbial bioactivity can induce calcite-precipitation in concrete, which seals micro-cracks. In this respect, two Egyptian bacterial isolates were selected and identified, as (Bs) and (Bm) using MALDI-TOF/MS-Biotyper. Read More

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Motor Control and Ergonomic Intervention Home-Based Program: A Pilot Trial Performed in the Framework of the Motor Control Home Ergonomics Elderlies' Prevention of Falls (McHeELP) Project.

Cureus 2021 Apr 7;13(4):e14336. Epub 2021 Apr 7.

Physiotherapy, Physiotherapy Department, Faculty of Health and Care Sciences, University of West Attica (UNIWA), Athens, GRC.

Objectives Falls are a serious problem that can reduce living autonomy and health-related quality of life of older adults. A decrease in the muscular strength of the lower limbs and the deterioration of balance or motor performance deficits may lead to falls. "Motor Control Home Ergonomics Elderlies' Prevention of Falls" (McHeELP) is a novel motor control exercise program combined with ergonomic arrangements of the home environment. Read More

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Barrier for Particle Dispersion Control During Mastoidectomy.

Int Arch Otorhinolaryngol 2021 Apr 19;25(2):e296-e300. Epub 2021 Feb 19.

Discipline of Otorhinolaryngology, Hospital Walter Cantídio, Universidade Federal do Ceará, CE, Brazil.

 The China Health Authority alerted the World Health Organization (WHO) of several cases of pneumonia, and the WHO has declared the novel coronavirus (COVID-19) a global pandemic. Mastoidectomy is a high-risk aerosol generating procedure with the potential to expose the surgeon to infectious particles.  Aim to develop a low-cost prototype for a barrier device that can be used during mastoidectomy. Read More

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The Association Between Locus of Control and Psychopathology: A Cross-Cohort Comparison Between a UK (Avon Longitudinal Study of Parents and Children) and a Japanese (Tokyo Teen Cohort) Cohort.

Front Psychol 2021 21;12:600941. Epub 2021 Apr 21.

Unit for Mental Health Promotion, Research Centre for Social Science & Medicine, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan.

An external locus of control (externality) is associated with poorer psychopathology in individualist cultures, but associations are reported to be weaker in collectivist cultures where an external style is less maladaptive. We investigated the prospective association between externality and psychotic-like experiences (PLE) and depressive symptoms (DS) and compared the strength of associations between a UK and a Japanese cohort. Cross-cultural cohort study of a UK (Avon Longitudinal Study of Parents and Children) and a Japanese cohort (Tokyo Teen Cohort). Read More

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Effect of Cathodic Arc Plasma Deposition on Shear Bond Strength between Palladium Cobalt Chromium Coated with Titanium Nitride and Titanium Aluminium Nitride with Ceramic.

Contemp Clin Dent 2021 Jan-Mar;12(1):49-54. Epub 2021 Mar 20.

Department of Prosthodontics, SRM Dental College, Chennai, Tamil Nadu, India.

Background: The success of esthetic ceramo-metal restoration is strongly influenced by its bond strength. The success of ceramo-metal restoration is subjective to its bond strength.

Aim And Objectives: The aim of this study is to evaluate the shear bond strength between palladium-based cobalt chromium (Co-Cr) alloy coated with titanium nitride (TiNi) and titanium aluminum nitride with feldspathic ceramics. Read More

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Eccentric training effects for patients with post-stroke hemiparesis on strength and speed gait: A randomized controlled trial.

NeuroRehabilitation 2021 Apr 30. Epub 2021 Apr 30.

Aix Marseille Université, CNRS, Institut des Sciences du Mouvement UMR, Marseille, France.

Background: In hemiparetic patients, the skeletal muscle is mainly affected with a combination of abnormalities (denervation, remodeling, spasticity, and eventually muscular atrophy).

Objective: This study examined the role of eccentric exercise in strengthening muscles of the lower extremity and ultimately improving autonomy in patients with post-stroke hemiparesis during gait.

Methods: Thirty-seven patients hemiparetic adults were recruited, randomized into a control group (n = 19) and an intervention group receiving eccentric muscle strengthening (n = 18). Read More

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Ceria-Incorporated Biopolymer for Preventing Fungal Adhesion.

ACS Biomater Sci Eng 2021 May 4;7(5):1808-1816. Epub 2020 Dec 4.

Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan 31116, South Korea.

Although biopolymers are widely used in biomedical fields, the issue of poor antimicrobial properties remains unsolved, leading to a potential increase in infections. Here, ceria nanoparticles (CNPs) were incorporated into a representative biopolymer, poly(methyl methacrylate) (PMMA), for drug-free antimicrobial properties. After characterizing the CNPs and surface/mechanical properties of the CNP-PMMA nanocomposite, antiadhesive effects against , the most common fungal species responsible for fungal infections, were determined using metabolic activity assays, and the underlying microbial antiadhesive mechanism was revealed. Read More

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Altered Behavioral Performance in the Neuron-Specific HIF-1- and HIF-2-Deficient Mice Following Chronic Hypoxic Exposure.

Adv Exp Med Biol 2021 ;1269:271-276

Department of Physiology and Biophysics, Case Western Reserve University, Cleveland, OH, USA.

Hypoxia-inducible factors (HIFs) are transcriptional regulators that mediate in mice for HIF-1 and HIF-2. The objective of this study was to investigate the effect of neuronal deletion of HIF-1 and HIF-2 in hypoxic adaptation by using the neuron-specific knockout (KO) mice. The floxed control and KO mice were used. Read More

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January 2021

Methacrylate-functionalized proanthocyanidins as novel polymerizable collagen cross-linkers - Part 2: Effects on polymerization, microhardness and leaching of adhesives.

Dent Mater 2021 May 5. Epub 2021 May 5.

School of Dentistry, University of Missouri - Kansas City, Kansas City, MO, 64108, USA. Electronic address:

Objective: The aim of the study was to investigate the effects of a novel polymerizable collagen cross-linker methacrylate-functionalized proanthocyanidins (MAPA) on the polymerization, microhardness and leaching of a HEMA-based experimental dental adhesive system.

Methods: Three MAPAs were synthesized using different methacrylate (MA) to proanthocyanidins (PA) feeding ratios of 1:2, 1:1, and 2:1 to obtain MAPA-1, MAPA-2, and MAPA-3, respectively. The resulting three MAPAs and PA were added to an experimental adhesive formulated with HEMA and a tri-component photoinitiator system (0. Read More

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Polybutylene-adipate-terephthalate and niobium-containing bioactive glasses composites: Development of barrier membranes with adjusted properties for guided bone regeneration.

Mater Sci Eng C Mater Biol Appl 2021 Jun 19;125:112115. Epub 2021 Apr 19.

Dental Materials Laboratory, School of Dentistry, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil. Electronic address:

This study aimed to develop bioactive guided bone regeneration (GBR) membranes by manufacturing PBAT/BAGNb composites as casting films. Composites were produced by melt-extrusion, and BAGNb was added at 10 wt%, 20 wt%, and 30 wt% concentration. Pure PBAT membranes were used as a control (0wt%BAGNb). Read More

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Building the Sierra Leone Ebola Database: organization and characteristics of data systematically collected during 2014-2015 Ebola epidemic.

Ann Epidemiol 2021 May 6. Epub 2021 May 6.

National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention, Atlanta, United States.

Background: During the 2014-2016 Ebola outbreak in West Africa, the Sierra Leone Ministry of Health and Sanitation (MoHS), the US Centers for Disease Control and Prevention, and responding partners under the coordination of the National Ebola Response Center (NERC) and the MoHS's Emergency Operation Center (EOC) systematically recorded information from the 117 Call Center system and district alert phone lines, case investigations, laboratory sample testing, clinical management, and safe and dignified burial records. Since 2017, CDC assisted MoHS in building and managing the Sierra Leone Ebola Database (SLED) to consolidate these major data sources. The primary objectives of the project were helping families to identify the location of graves of their loved ones who died at the time of the Ebola epidemic through the SLED Family Reunification Program and creating a data source for epidemiological research. Read More

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Effects of whole-body vibration training on body composition, cardiometabolic risk and strength in overweight and obese population: A systematic review with meta-analysis.

Arch Phys Med Rehabil 2021 May 6. Epub 2021 May 6.

Faculty of Sports, Catholic University of San Antonio (UCAM), Murcia, Spain; Department of Education, University of Alcalá, Madrid, Spain.

Objectives: To assess the effects of whole-body vibration training (WBVT) on body composition, metabolic and cardiovascular risk variables and lower-limb strength in overweight/obese subjects.

Data Sources: A systematic review with meta-analysis was conducted in three databases (PubMed-Medline, Web of Science and Cochrane Library), from inception through to January 26, 2020.

Study Selection: Studies analysing the effect of WBVT on body composition variables, metabolic profile, blood pressure, heart rate and lower-limb strength in overweight/obese population, with interventions of a minimum length of two weeks were included. Read More

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Effect of sintering and aging processes on the mechanical and optical properties of translucent zirconia.

J Prosthet Dent 2021 May 5. Epub 2021 May 5.

Associate Professor, Department of Prosthodontics, Faculty of Dentistry, Bolu Abant Izzet Baysal University, Bolu, Turkey.

Statement Of Problem: Sintering holding times and aging conditions may affect the optical, mechanical, and structural properties of polychromatic multitranslucent zirconia. However, a consensus on the ideal sintering condition for this material is lacking.

Purpose: The purpose of this in vitro study was to investigate the effect of different sintering holding and autoclave aging times on the flexural strength (FS), grain size, and translucency parameter (TP) of a translucent zirconia. Read More

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Suture Tape Augmentation Improves the Biomechanical Performance of Bone-Patellar Tendon-Bone Grafts Used for Anterior Cruciate Ligament Reconstruction.

Arthroscopy 2021 May 5. Epub 2021 May 5.

Washington University Department of Orthopedic Surgery, St. Louis, MO.

Purpose: The purpose of this study was to investigate the time-zero biomechanical properties (stiffness, displacement and load at failure) of bone-patellar tendon-bone (BTB) grafts used for anterior cruciate ligament (ACL) reconstruction with and without suture tape augmentation as a means to determine the potential clinical benefit of this technique.

Methods: Eight juvenile porcine knees underwent ACL reconstruction with a human cadaveric BTB graft (control). These were compared to eight juvenile porcine knees that underwent ACL reconstruction with a BTB graft augmented with suture tape. Read More

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Effect of epigallocatechin-3-gallate and thermal cycling on the bond strength of resin cements to the root dentin.

Odontology 2021 May 8. Epub 2021 May 8.

School of Dentistry, University of Ribeirão Preto, Avenida Costábile Romano, 2201-Ribeirânia, Ribeirão Prêto, Sao Paulo, 14096-000, Brazil.

This study evaluated the effect of epigallocatechin-3-gallate (EGCG) solution and thermal cycling on the bond strength (BS) of fiber posts to the root dentin using two different resin cements (conventional or self-adhesive). One hundred and forty-four bovine roots were endodontically treated. After post space preparation, specimens were randomly divided into six groups (n = 24) according to dentin pretreatment [distilled water, 0. Read More

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