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https://www.readbyqxmd.com/read/29675915/monthly-population-density-and-structure-patterns-of-an-endangered-seahorse-hippocampus-capensis-a-comparison-between-natural-and-artificial-habitats
#1
L Claassens, A N Hodgson
This study investigated aspects of the population ecology of the endangered Knysna seahorse Hippocampus capensis within different habitat types. High densities of H. capensis were found within artificial Reno mattress habitat, within the Knysna Estuary, South Africa. Monthly surveys at three sites were conducted from October 2015 to August 2016 to compare population densities of H. capensis in this artificial habitat with natural eel grass Zostera capensis habitat. Hippocampus capensis densities varied significantly across all sites and highest population densities were consistently observed within the Reno mattress habitat...
April 19, 2018: Journal of Fish Biology
https://www.readbyqxmd.com/read/29627419/health-risk-assessment-of-heavy-metals-in-freshwater-fish-in-the-central-and-eastern-north-china
#2
Wenjue Zhong, Yanfeng Zhang, Zihao Wu, Rongyan Yang, Xinyue Chen, Jing Yang, Lingyan Zhu
The distribution and potential health risks of eight heavy metals (Copper (Cu), Chromium (Cr), Zinc (Zn), Lead (Pb), Arsenic (As), Cadmium (Cd), Manganese (Mn), Nickel (Ni)) in 16 freshwater systems from central and eastern North China, were investigated. The fish were divided as wild fish, which grew naturally without artificially feeding, and farmed fish. The total concentrations of the eight heavy metals ranged from 82.9 to 226 μg/L in the surface water samples and 3.32-27.6 mg/kg dw in the fish samples...
April 5, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29619795/switching-between-pitch-surfaces-practical-applications-and-future-perspectives-for-soccer-training
#3
Vincenzo Rago, João R Silva, João Brito, Daniel Barreira, Magni Mohr, Peter Krustrup, António N Rebelo
Soccer training and completion is conventionally practiced on natural grass (NG) or artificial turf (AT). Recently, AT pitches for training / competition, and of unstable surfaces for injury prevention training has increased. Therefore, soccer players are frequently exposed to variations in pitch surface during either training or competition. These ground changes may impact physical and physiological responses, adaptations as well as the injury. The aim of this review was to summarize the acute physical and physiological responses, chronic adaptations, and injury risk associated with exercising on different pitch surfaces in soccer...
April 4, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29599754/generalized-growth-of-estuarine-household-and-clinical-isolates-of-pseudomonas-aeruginosa
#4
Kelly E Diaz, Susanna K Remold, Ogochukwu Onyiri, Maura Bozeman, Peter A Raymond, Paul E Turner
Pseudomonas aeruginosa is an opportunistic pathogen of particular concern to immune-compromised people, such as cystic fibrosis patients and burn victims. These bacteria grow in built environments including hospitals and households, and in natural environments such as rivers and estuaries. However, there is conflicting evidence whether recent environments like the human lung and open ocean affect P. aeruginosa growth performance in alternate environments. We hypothesized that bacteria recently isolated from dissimilar habitats should grow differently in media containing artificial versus natural resources...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29595083/playing-surface-and-uk-professional-rugby-union-injury-risk
#5
Craig Ranson, Jonathan George, James Rafferty, John Miles, Isabel Moore
Artificial rugby union playing surface installation is increasing. This prospective cohort study aimed to examine the effect of playing surface on match injury types within 157 players of two UK professional rugby union clubs playing 209 matches (96 on artificial surfaces and 113 on grass) over three seasons. There was no difference in overall injury risk between the two playing surfaces with injury incidence on artificial 80.2 (CI 69.9-91.7) and on grass 81.9 per 1000 match-hours (CI 72.2-92.5), with an incidence rate ratio (RR) of 0...
March 29, 2018: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29479994/characteristics-of-goalkeepers-injuries-retrospective-self-reported-study-among-adolescence-football-players
#6
Aleksander Błażkiewicz, Monika Grygorowicz, Arkadiusz Białostocki, Dariusz Czaprowski
BACKGROUND: Characteristic types of actions and training/matches loads of football goalkeepers show that goalkeeper's performance differs from other football's formations. Such situation may predispose to the occurrence of other kinds of injuries in this position. The aim of this study was to analyse epidemiology of injuries in young football goalkeepers. METHODS: 48 football goalkeepers (aged:15.2±1.9 years) were filled the questionnaire aimed at collecting information about all injuries sustained within 12 months before the data collection...
February 26, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29363348/reliability-of-internal-and-external-load-parameters-in-recreational-football-soccer-for-health
#7
Marco Beato, Mikael Jamil, Gavin Devereux
There is limited research focussed around the analysis of internal and external load parameters during football health programmes. The aim of this study was to assess the reliability of internal and external load parameters in this activity. Thrity subjects were enrolled (mean ± SDs; age = 43 ± 3 years, weight = 84 ± 14 kg, height = 176 ± 7 cm, BMI = 27.1 ± 3, VO2 max = 40.7 ± 3.4 ml. kg. min-1 ). The football matches (five a-side) took place on an artificial grass outdoor field (pitch size of 36 × 18...
April 2018: Research in Sports Medicine
https://www.readbyqxmd.com/read/29363031/effect-of-intermittent-operation-model-on-the-function-of-soil-infiltration-system
#8
Lizhu Hou, Bill X Hu, Mengmeng He, Xue Xu, Wenjing Zhang
To enhance denitrification in a process of solute infiltration through a soil, a two-section mixed-medium soil infiltration system (TMSIS) for urban non-point pollution was developed. The artificial aerobic respiration and nitrification took place in the upper aerobic section (AES), while grass powders and sawdust were mixed in the bottom anaerobic section (ANS) to supply organic carbon source for denitrification bacteria, and the reduction was increased by iron addition in the ANS. Measured resident concentrations from the bottom of each ANS column were assumed to represent mean values averaged over the column cross-sectional area...
April 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29314414/an-ortholog-of-curly-leaf-enhancer-of-zeste-like-1-is-required-for-proper-flowering-in-brachypodium-distachyon
#9
Aaron Lomax, Daniel P Woods, Yinxin Dong, Frédéric Bouché, Ying Rong, Kevin S Mayer, Xuehua Zhong, Richard M Amasino
Many plants require prolonged exposure to cold to acquire the competence to flower. The process by which cold exposure results in competence is known as vernalization. In Arabidopsis thaliana, vernalization leads to the stable repression of the floral repressor FLOWERING LOCUS C via chromatin modification, including an increase of trimethylation on lysine 27 of histone H3 (H3K27me3) by Polycomb Repressive Complex 2 (PRC2). Vernalization in pooids is associated with the stable induction of a floral promoter, VERNALIZATION 1 (VRN1)...
March 2018: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/29283689/physiological-and-physical-responses-according-to-the-game-surface-in-a-soccer-simulation-protocol
#10
Jorge Lopez-Fernandez, Javier Sánchez-Sánchez, Jorge García-Unanue, José Luis Felipe, Enrique Colino-Acevedo, Leonor Gallardo
PURPOSE: Recent studies have shown that soccer player's responses are similar on natural grass (NG) and artificial turf (AT), but they did not control the mechanical properties of these surfaces. This work aimed to analyse the influence of the game surface on amateur soccer player's physical and physiological responses using a soccer simulation protocol (SSP). METHODS: Sixteen amateur players performed three bouts of the SSP on AT and NG. The mechanical properties of both surfaces were recorded...
December 28, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29160900/fusarium-graminearum-pathogen-or-endophyte-of-north-american-grasses
#11
Lotus A Lofgren, Nicholas R LeBlanc, Amanda K Certano, Jonny Nachtigall, Kathryn M LaBine, Jakob Riddle, Karen Broz, Yanhong Dong, Bianca Bethan, Christopher W Kafer, H Corby Kistler
Mycotoxin-producing Fusarium graminearum and related species cause Fusarium head blight on cultivated grasses, such as wheat and barley. However, these Fusarium species may have had a longer evolutionary history with North American grasses than with cultivated crops and may interact with the ancestral hosts in ways which are biochemically distinct. We assayed 25 species of asymptomatic native grasses for the presence of Fusarium species and confirmed infected grasses as hosts using re-inoculation tests. We examined seed from native grasses for the presence of mycotoxin-producing Fusarium species and evaluated the ability of these fungi to produce mycotoxins in both native grass and wheat hosts using biochemical analysis...
February 2018: New Phytologist
https://www.readbyqxmd.com/read/29128769/erosion-induced-losses-of-carbon-nitrogen-phosphorus-and-heavy-metals-from-agricultural-soils-of-contrasting-organic-matter-management
#12
Pu Shi, Rainer Schulin
Water erosion on agricultural land preferentially carries away fine particles. Due to the generally high specific density of sorption sites of these particles, their displacement can be associated with substantial particle-bound transfer also of nutrients and pollutants with low solubility. Organic matter amendments can reduce soil erosion, but to what extent they affect the erosion-induced element losses has not been studied much. Here, we carried out field rainfall experiments on three pairs of soil plots (1...
November 9, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29095037/the-heat-strain-of-various-athletic-surfaces-a-comparison-between-observed-and-modeled-wet-bulb-globe-temperatures
#13
J Luke Pryor, Riana R Pryor, Andrew Grundstein, Douglas J Casa
CONTEXT:   The National Athletic Trainers' Association recommends using onsite wet-bulb globe temperature (WBGT) measurement to determine whether to modify or cancel physical activity. However, not all practitioners do so and instead they may rely on the National Weather Service (NWS) to monitor weather conditions. OBJECTIVE:   To compare regional NWS WBGT estimates with local athletic-surface readings and compare WBGT measurements among various local athletic surfaces...
November 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/29043054/woody-structure-facilitates-invasion-of-woody-plants-by-providing-perches-for-birds
#14
Chelse M Prather, Andrew Huynh, Steven C Pennings
Woody encroachment threatens prairie ecosystems globally, and thus understanding the mechanisms that facilitate woody encroachment is of critical importance. Coastal tallgrass prairies along the Gulf Coast of the US are currently threatened by the spread of several species of woody plants. We studied a coastal tallgrass prairie in Texas, USA, to determine if existing woody structure increased the supply of seeds from woody plants via dispersal by birds. Specifically, we determined if (i) more seedlings of an invasive tree ( Tridacia sebifera ) are present surrounding a native woody plant ( Myrica cerifera ); (ii) wooden perches increase the quantity of seeds dispersed to a grassland; and (iii) perches alter the composition of the seed rain seasonally in prairie habitats with differing amounts of native and invasive woody vegetation, both underneath and away from artificial wooden perches...
October 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/29038014/effects-of-lignins-as-diet-components-on-the-physiological-activities-of-a-lower-termite-coptotermes-formosanus-shiraki
#15
Didi Tarmadi, Tsuyoshi Yoshimura, Yuki Tobimatsu, Masaomi Yamamura, Toshiaki Umezawa
We investigated the effects of lignins as diet components on the physiological activities of a lower termite, Coptotermes formosanus Shiraki. Artificial diets composed of polysaccharides with and without purified lignins (milled-wood lignins) from Japanese cedar (softwood), Japanese beech (hardwood), and rice (grass), were fed to C. formosanus workers. The survival and body mass of the workers as well as the presence of three symbiotic protists in the hindguts of the workers were then periodically examined...
November 2017: Journal of Insect Physiology
https://www.readbyqxmd.com/read/28953958/effects-of-age-on-the-soccer-specific-cognitive-motor-performance-of-elite-young-soccer-players-comparison-between-objective-measurements-and-coaches-evaluation
#16
COMPARATIVE STUDY
Halim Hicheur, Alan Chauvin, Steve Chassot, Xavier Chenevière, Wolfgang Taube
The cognitive-motor performance (CMP), defined here as the capacity to rapidly use sensory information and transfer it into efficient motor output, represents a major contributor to performance in almost all sports, including soccer. Here, we used a high-technology system (COGNIFOOT) which combines a visual environment simulator fully synchronized with a motion capture system. This system allowed us to measure objective real-time CMP parameters (passing accuracy/speed and response times) in a large turf-artificial grass playfield...
2017: PloS One
https://www.readbyqxmd.com/read/28949805/ivermectin-dissipation-and-movement-from-feces-to-soil-under-field-conditions
#17
Lucía Emilia Iglesias, Carlos Saumell, Federica Sagüés, Juan Manuel Sallovitz, Adrián Luis Lifschitz
The aim of this work was to evaluate the fate of ivermectin (IVM) at two concentrations in cattle feces and its movement to the nearby soil and plants. Feces were spiked with IVM at two levels: 3000 ng g-1 (high group, HG) and 300 ng g-1 (low group, LG). Artificial dung pats were prepared and deposited in an experimental field area. Feces and underlying soil were sampled up to 60 days post-deposition (dpd). As an additional analysis, grasses growing around the pats were sampled at 30 and 60 dpd. Ivermectin concentrations in all matrices were determined by HPLC...
January 2, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28944649/neuromuscular-responses-and-physiological-patterns-during-a-soccer-simulation-protocol-artificial-turf-versus-natural-grass
#18
Jorge López-Fernández, Jorge García-Unanue, Javier Sánchez-Sánchez, Manuel León, Enrique Hernando, Leonor Gallardo
BACKGROUND: Latest studies suggest similar performance of soccer players either on artificial turf (AT) or natural grass (NG). However, it is not clear if their muscular and physiological responses are also similar on both surfaces. This research aims to assess the influence of game surface on physiological patterns and neuromuscular responses of soccer players during a soccer simulation protocol (SSP) that incorporates repeated sprints and nonlinear actions at maximum speed. METHODS: Sixteen amateur soccer players completed three bouts of the SSP on both AT and NG...
September 22, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28922682/the-energy-cost-of-running-with-the-ball-in-soccer
#19
Alessandro Piras, Milena Raffi, Charalampos Atmatzidis, Franco Merni, Rocco Di Michele
Running with the ball is a soccer-specific activity frequently used by players during match play and training drills. Nevertheless, the energy cost (EC) of on-grass running with the ball has not yet been determined. The purpose of this study was therefore to assess the EC of constant-speed running with the ball, and to compare it with the EC of normal running. Eight amateur soccer players performed two 6- min runs at 10 km/h on artificial turf, respectively with and without the ball. EC was measured with indirect calorimetry and, furthermore, estimated with a method based on players' accelerations measured with a GPS receiver...
November 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28922490/risk-factors-for-football-injuries-in-young-players-aged-7-to-12-years
#20
Roland Rössler, Astrid Junge, Jiri Chomiak, Karel Němec, Jiri Dvorak, Eric Lichtenstein, Oliver Faude
OBJECTIVES: Football (soccer) is very popular amongst children. Little is known about risk factors for football injuries in children. The aim was to analyse potential injury risk factors in 7 to 12 year old players. DESIGN: Prospective epidemiological study. METHODS: We collected prospective data in Switzerland and the Czech Republic over two seasons. Coaches reported exposure of players (in hours), absence, and injury data via an internet-based registration system...
September 18, 2017: Scandinavian Journal of Medicine & Science in Sports
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