keyword
MENU ▼
Read by QxMD icon Read
search

Rfd

keyword
https://www.readbyqxmd.com/read/29329099/accumulation-patterns-and-risk-assessment-of-metals-and-metalloid-in-muscle-and-offal-of-free-range-chickens-cattle-and-goat-in-benin-city-nigeria
#1
Emmanuel Temiotan Ogbomida, Shouta M M Nakayama, Nesta Bortey-Sam, Balazs Oroszlany, Isioma Tongo, Alex Ajeh Enuneku, Ogbeide Ozekeke, Martins Oshioriamhe Ainerua, Iriagbonse Priscillia Fasipe, Lawrence Ikechukwu Ezemonye, Hazuki Mizukawa, Yoshinori Ikenaka, Mayumi Ishizuka
The use of free range animals for monitoring environmental health offers opportunities to detect exposure and assess the toxicological effects of pollutants in terrestrial ecosystems. Potential human health risk of dietary intake of metals and metalloid via consumption of offal and muscle of free range chicken, cattle and goats by the urban population in Benin City was evaluated. Muscle, gizzard, liver and kidney samples were analyzed for Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Cd, and Pb concentrations using inductively coupled plasma mass spectrometer (ICP-MS) while Hg was determined using Hg analyzer...
January 9, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29324873/a-new-strength-assessment-to-evaluate-the-association-between-muscle-weakness-and-gait-pathology-in-children-with-cerebral-palsy
#2
Marije Goudriaan, Angela Nieuwenhuys, Simon-Henri Schless, Nathalie Goemans, Guy Molenaers, Kaat Desloovere
AIM: The main goal of this validation study was to evaluate whether lower limb muscle weakness and plantar flexor rate of force development (RFD) related to altered gait parameters in children with cerebral palsy (CP), when weakness was assessed with maximal voluntary isometric contractions (MVICs) in a gait related test position. As a subgoal, we analyzed intra- and intertester reliability of this new strength measurement method. METHODS: Part 1 -Intra- and intertester reliability were determined with the intra-class correlation coefficient (ICC2,1) in 10 typical developing (TD) children (age: 5-15)...
2018: PloS One
https://www.readbyqxmd.com/read/29306804/phosphorus-flame-retardants-and-bisphenol-a-in-indoor-dust-and-pm2-5-in-kindergartens-and-primary-schools-in-hong-kong
#3
Wen-Jing Deng, Na Li, Rudolf Wu, Wong K S Richard, Zijian Wang, Wingkei Ho
Organophosphate flame retardants (PFRs) and bisphenol A (BPA) were measured in indoor dust and PM2.5 samples from nine kindergartens and two primary schools in Hong Kong. The average levels of PM2.5 ranged from 4.0E+03 ng/m3 to 1.5E+04 ng/m3. Average levels of PFRs (from 1.5 ng/m3 to 20 ng/m3 in PM2.5; from 8.0E-02 μg/g dw to 2.4 μg/g dw in dust) and BPA (from 6.4E-01 ng/m3 to 1.0 ng/m3 in PM2.5; from 1.0E-02 μg/g dw to 2.0E-01 μg/g dw in dust) were detected in most of the sampling sites...
January 4, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29300147/relationships-between-highly-skilled-golfers-clubhead-velocity-and-force-producing-capabilities-during-vertical-jumps-and-an-isometric-mid-thigh-pull
#4
Jack E T Wells, Andrew C S Mitchell, Laura H Charalambous, Iain M Fletcher
Whilst previous research has highlighted significant relationships between golfers' clubhead velocity (CHV) and their vertical jump height and maximum strength, these field-based protocols were unable to measure the actual vertical ground reaction force (vGRF) variables that may correlate to performance. The aim of this study was to investigate relationships between isometric mid-thigh pull (IMTP), countermovement jump (CMJ), squat jump (SJ) and drop jump (DJ) vGRF variables and CHV in highly skilled golfers...
January 4, 2018: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29274581/the-visual-attention-span-deficit-in-chinese-children-with-reading-fluency-difficulty
#5
Jing Zhao, Menglian Liu, Hanlong Liu, Chen Huang
With reading development, some children fail to learn to read fluently. However, reading fluency difficulty (RFD) has not been fully investigated. The present study explored the underlying mechanism of RFD from the aspect of visual attention span. Fourteen Chinese children with RFD and fourteen age-matched normal readers participated. The visual 1-back task was adopted to examine visual attention span. Reaction time and accuracy were recorded, and relevant d-prime (d') scores were computed. Results showed that children with RFD exhibited lower accuracy and lower d' values than the controls did in the visual 1-back task, revealing a visual attention span deficit...
December 20, 2017: Research in Developmental Disabilities
https://www.readbyqxmd.com/read/29240311/systemic-changes-in-photosynthesis-and-ros-homeostasis-in-shoots-of-arabidopsis-thaliana-infected-with-beet-cyst-nematode-heterodera-schachtii
#6
Mateusz Labudda, Elżbieta Różańska, Weronika Czarnocka, Mirosław Sobczak, Jolanta Maria Dzik
Photosynthetic efficiency and redox homeostasis are important for plant physiological processes during regular development as well as defence responses. The second-stage juveniles of the Heterodera schachtii, induce syncytial feeding sites in host roots. To ascertain whether development of the syncytia alters photosynthesis and metabolism of ROS, chlorophyll a fluorescence measurements and antioxidant responses were studied in Arabidopsis thaliana shoots at the day of inoculation and at 3, 7 and 15 days post-inoculation (dpi)...
December 14, 2017: Molecular Plant Pathology
https://www.readbyqxmd.com/read/29206782/muscle-fiber-and-performance-changes-after-fast-eccentric-complex-training
#7
Gregory C Bogdanis, Athanasios Tsoukos, Lee E Brown, Elisavet Selima, Panagiotis Veligekas, Konstantinos Spengos, Gerasimos Terzis
INTRODUCTION: The purpose of this study was to examine the effects of a short-term fast eccentric and ballistic complex training program on muscle power, rate of force development (RFD), muscle fiber composition and cross-sectional area (CSA). METHODS: Sixteen male physical education students were randomly assigned to either a training group (TG, n=8) or a control group (C, n=8). The TG followed a 6-week low volume training program, including fast eccentric squat training with an individually optimized load of 74±7% of maximal half-squat strength (1RM) twice per week and a ballistic training session with loaded (30% 1RM) and unloaded jump squats, once per week, all combined with unloaded plyometric jumps...
December 2, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29206109/methodological-considerations-in-the-calculation-of-the-rate-of-force-development-scaling-factor
#8
Dusica Djordjevic, Mehmet Uygur
OBJECTIVE: Within this methodological study, we aimed to explore the effects of seven different commonly applied routines for rate of force development (RFD) calculation on the calculation of rate of force development scaling factor (RFD-SF) and r2 and the between session reliability of RFD-SF in three different muscle groups. APPROACH: We tested grip force muscles, elbow extensors and knee extensors of 13 healthy subjects asking them to produce around 120 rapid isometric force pulses per muscle to varying submaximal amplitudes...
December 5, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/29196141/effect-of-resistance-training-on-muscle-strength-and-rate-of-force-development-in-healthy-older-adults-a-systematic-review-and-meta-analysis
#9
REVIEW
Pedro de Camargo Guizelini, Rafael Alves de Aguiar, Benedito Sérgio Denadai, Fabrizio Caputo, Camila Coelho Greco
Rapid force capacity, identified by rate of rise in contractile force at the onset of contraction, i.e., the rate of force development (RFD), has been considered an important neuromuscular parameter of physical fitness in elderly individuals. Randomized control studies conducted in adults have found that resistance training may elicit different outcomes in terms of RFD and muscle strength. Thus, the main purpose of this study was to review systematically the literature for studies regarding the influence of resistance training on muscle strength and RFD in elderly persons...
November 28, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/29194653/electrophysiological-markers-predicting-impeding-av-block-during-ablation-of-atrioventricular-nodal-re-entry-tachycardia
#10
Nikolaos Fragakis, Lydia Krexi, Panagiota Kyriakou, Melani Sotiriadou, Charalambos Lazaridis, Athanasios Karamanolis, Panagiotis Dalampyras, Stelios Tsakiroglou, Vassilios Skeberis, Dimitrios Tsalikakis, Vassilios Vassilikos
BACKGROUND: Radiofrequency (RF) ablation of the slow pathway (SP) in atrioventricular nodal reentry tachycardia (AVNRT) is occasionally complicated with atrioventricular block (AVB) often predicted by junctional beats (JB) with loss of ventriculo-atrial (VA) conduction. METHODS: We analysed retrospectively 153 patients undergoing ablation of SP for typical AVNRT. Patients were divided into two age groups: 127 ≤70 years and 26 > 70 years. We analysed the interval between the atrial electrogram in the His-bundle position and the distal ablation catheter [A(H)-A(RFd)] and the proximal coronary sinus catheter [A(RFd)-A(CS)] before RF applications with and without JB...
November 30, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29182457/a-comparison-of-the-isometric-mid-thigh-pull-and-isometric-squat-intraday-reliability-usefulness-and-the-magnitude-of-difference-between-tests
#11
Claire J Brady, Andrew J Harrison, Eamonn P Flanagan, G Gregory Haff, Thomas M Comyns
PURPOSE: This investigation examined the reliability and usefulness of the isometric mid-thigh pull (IMTP) and isometric squat (ISqT) performed at the same knee and hip angles. The scores produced in each test were compared to determine the magnitude of differences between tests. METHODS: Twenty six male and female athletes (23.6±4.3 y; 1.75±0.07 m; 68.8±9.7 kg) performed 2 maximal repetitions of the IMTP and ISqT following a specific warm up. RESULTS: Maximum force, absolute peak force (PF), relative PF, allometrically scaled PF, rate of force development (RFD) (0 - 200 and 0 - 250 ms) and impulse (0 - 300 ms) were deemed reliable (ICC ≥ 0...
November 28, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29162533/derivation-of-an-oral-reference-dose-rfd-for-di-2-ethylhexyl-cyclohexan-1-4-dicarboxylate-dehch-an-alternative-to-phthalate-plasticizers
#12
Brian J Hughes, Kevin Cox, Virunya Bhat
Di 2-ethylhexyl cyclohexane-1,4-dicarboxylate (DEHCH, CAS 84731-70-4) is an ester of polycarboxylic acid assessed in a wide variety of ecotoxicological and mammalian toxicity assays as a substitute for phthalate ester-type plasticizers. Laboratory animal data indicate that DEHCH has a low acute oral and dermal toxicity, is non-irritating to the skin and eyes, and is a non-sensitizer. In an OECD 422 combined repeat dose toxicity study with a reproductive/developmental toxicity screening test in Sprague-Dawley rats, minimal effects were observed on the liver, spleen, and thyroid...
November 18, 2017: Regulatory Toxicology and Pharmacology: RTP
https://www.readbyqxmd.com/read/29102831/bilateral-deficit-in-explosive-force-related-to-sit-to-stand-performance-in-older-postmenopausal-women
#13
J D Ruiz-Cárdenas, J J Rodríguez-Juan, J M Jakobi, J Ríos-Díaz, E Marín-Cascales, J A Rubio-Arias
The purpose of this study was to determine whether the bilateral deficit (BLD) for maximal voluntary force (MVF) and rate of force development (RFD) influences sit-to-stand in older postmenopausal women. Fourteen women performed unilateral and bilateral maximal voluntary contractions during isometric leg-extension. The MVF and RFD over consecutive 50ms periods (0-50, 50-100 and 100-150ms) after force onset and the time to sit-to-stand test were calculated. There was only a BLD for RFD 0-50ms and 50-100ms. The time of sit-to-stand was moderately correlated to BLD for RFD 0-50ms (r=0...
October 31, 2017: Archives of Gerontology and Geriatrics
https://www.readbyqxmd.com/read/29073840/a-novel-apparatus-measuring-knee-flexor-strength-during-various-hamstring-exercises-a-reliability-and-retrospective-study
#14
Jack T Hickey, Peter F Hickey, Nirav Maniar, Ryan G Timmins, Morgan D Williams, Christian A Pitcher, David A Opar
Study Design Reliability and case-control injury study. Background Knee flexor strength is a key variable when dealing with hamstring strain injury (HSI) and methodologies of objective measurement are often limited to single exercises. Objectives To establish test re-test reliability of a novel apparatus measuring knee flexor strength during various hamstring exercises; to investigate whether these measures detect between-leg differences in males with and without history of unilateral HSI. Methods Twenty males without and ten males with previous unilateral HSI participated...
October 26, 2017: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/29065077/optimizing-half-squat-postactivation-potential-load-in-squat-jump-training-for-eliciting-relative-maximal-power-in-ski-jumpers
#15
Artur Gołaś, Michal Wilk, Petr Stastny, Adam Maszczyk, Katarzyna Pajerska, Adam Zając
Gołaś, A, Wilk, M, Stastny, P, Maszczyk, A, Pajerska, K, and Zając, A. Optimizing half squat postactivation potential load in squat jump training for eliciting relative maximal power in ski jumpers. J Strength Cond Res 31(11): 3010-3017, 2017-Training load manipulation in a single workout session can increase or decrease training effectiveness in terms of athletes' strength or power gains. In ski jumping, the complex training that elicits maximal power gains may take advantage of the postactivation potentiation (PAP) mechanism...
November 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29064740/organophosphorus-flame-retardants-pfrs-and-phthalates-in-floor-and-road-dust-from-a-manual-e-waste-dismantling-facility-and-adjacent-communities-in-thailand
#16
Dudsadee Muenhor, Hyo-Bang Moon, Sunggyu Lee, Emma Goosey
This study was undertaken to investigate levels of organophosphorus flame retardants (PFRs) and phthalates in floor and road dust from a manual e-waste dismantling facility and nearby communities in Thailand. Concentrations of Σ10 PFRs and Σ6 phthalates in floor dust from the facility were approximately 36-1,700 and 86,000-790,000 ng g(-1), whereas those from the communities were about 13-9,200 and 44,000-2,700,000 ng g(-1), respectively. The highest content of Σ10 PFRs (9,200 ng g(-1)) and Σ6 phthalates (2,700,000 ng g(-1)) in indoor dust was both detected in the dust sampled from a house with no prevailing winds located 350 m northeast of the facility...
October 24, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29064106/integration-of-mechanistic-and-pharmacokinetic-information-to-derive-oral-reference-dose-and-margin-of-exposure-values-for-hexavalent-chromium
#17
Chad M Thompson, Christopher R Kirman, Sean M Hays, Mina Suh, Seneca E Harvey, Deborah M Proctor, Julia E Rager, Laurie C Haws, Mark A Harris
The current US Environmental Protection Agency (EPA) reference dose (RfD) for oral exposure to chromium, 0.003 mg kg(-1)  day(-1) , is based on a no-observable-adverse-effect-level from a 1958 bioassay of rats exposed to ≤25 ppm hexavalent chromium [Cr(VI)] in drinking water. EPA characterizes the confidence in this RfD as "low." A more recent cancer bioassay indicates that Cr(VI) in drinking water is carcinogenic to mice at ≥30 ppm. To assess whether the existing RfD is health protective, neoplastic and non-neoplastic lesions from the 2 year cancer bioassay were modeled in a three-step process...
October 24, 2017: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/29062193/application-of-radio-frequency-based-digital-thermometer-for-real-time-monitoring-of-dairy-cattle-rectal-temperature
#18
Tridib Debnath, Santanu Bera, Suman Deb, Prasenjit Pal, Nibash Debbarma, Avijit Haldar
AIM: Dairy cattle health monitoring program becomes vital for detecting the febrile conditions to prevent the outbreak of the animal diseases as well as ensuring the fitness of the animals that are directly affecting the health of the consumers. The aim of this study was to validate real-time rectal temperature (RT) data of radio frequency based digital (RFD) thermometer with RT data of mercury bulb (MB) thermometer in dairy cattle. MATERIALS AND METHODS: Two experiments were conducted...
September 2017: Veterinary World
https://www.readbyqxmd.com/read/29055583/risk-assessment-for-phthalate-exposures-in-the-elderly-a-repeated-biomonitoring-study
#19
Jin Hee Kim, Seungho Lee, Mi-Yeon Shin, Kyoung-Nam Kim, Yun-Chul Hong
Recent studies indicated that exposure to phthalates affects the development of a variety of diseases in the elderly population. However, limited information was available about the variability of phthalate daily intakes (DIs) and the proportion of the population that is highly exposed to phthalates. Therefore, we measured the levels of three phthalate metabolites, mono-(2-ethyl-5-hydroxyhexyl) phthalate (MEHHP), mono-(2-ethyl-5-oxohexyl) phthalate (MEOHP), and mono-n-butyl phthalate (MnBP) in 4014 urine samples repeatedly collected from 1646 elderly people...
October 18, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29017410/effects-of-knee-position-on-the-reliability-and-production-of-maximal-and-rapid-strength-characteristics-during-an-isometric-squat-test
#20
Ty B Palmer, Jose G Pineda, Rachel M Durham
This study aimed to examine the effects of knee position on the reliability and production of peak force (PF) and rate of force (RFD) development characteristics during an isometric squat. Fourteen resistance-trained females performed isometric squats at 90, 120, and 150° knee angles (corresponding to parallel, half, and quarter squat positions, respectively) on two different occasions, from which PF, peak RFD, and early (RFD30,RFD50,RFD100) and late (RFD200) phase RFD variables were extracted. PF and RFD200 were highly consistent across trials for all three squat positions, with intraclass correlation coefficients (ICCs) ranging between 0...
October 10, 2017: Journal of Applied Biomechanics
keyword
keyword
26355
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"