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https://www.readbyqxmd.com/read/28800473/public-health-risk-of-mercury-in-china-through-consumption-of-vegetables-a-modelling-study
#1
Ka-Ming Wai, Jiulan Dai, Peter K N Yu, Xuehua Zhou, Charles M S Wong
Sample measurement of mercury (Hg) contents is a common method for health risk assessment of Hg through vegetable consumption in China. In the present work, we undertook the first modelling study which produced consistent health-risk maps for the whole eastern China. Regional maps of Probable Daily Intake (PDI) of Total mercury (THg) and Methylmercury (MeHg) over the studied area were produced, which were important for the researchers and policy-makers to evaluate the risk and to propose mitigation measures if necessary...
August 8, 2017: Environmental Research
https://www.readbyqxmd.com/read/28795279/human-health-risk-assessment-and-pahs-in-a-stretch-of-river-ganges-near-kanpur
#2
Pooja Srivastava, T R Sreekrishnan, A K Nema
The presence of 13 polycyclic aromatic hydrocarbons (PAHs) was measured in a small stretch of river Ganges in Kanpur, using high-performance liquid chromatography equipped with photodiode array detector (HPLC/PDA). Non-carcinogenic risk on human health was calculated in the form of hazardous index. Carcinogenic risk was calculated as chronic daily intake and incremental lifetime cancer risk (ILCR) with the help of monitored PAHs in river water. Due to non-availability of reference dose (RfD) values for all the 13 PAHs, the combined hazardous index for three PAHs was calculated...
August 10, 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28791033/sink-status-and-photosynthetic-rate-of-the-leaflet-galls-induced-by-bystracoccus-mataybae-eriococcidae-on-matayba-guianensis-sapindaceae
#3
Denis C Oliveira, Ana Silvia F P Moreira, Rosy M S Isaias, Vitor Martini, Uiara C Rezende
The galling insect Bystracoccus mataybae (Eriococcidae) induces green and intralaminar galls on leaflets of Matayba guianensis (Sapindaceae), and promotes a high oxidative stress in host plant tissues. This biotic stress is assumed by the histochemical detection of hydrogen peroxide, a reactive oxygen species (ROS), whose production alters gall physiology. Thus, we hypothesize that high levels of nutrients are accumulated during gall development in response to a local maintenance of photosynthesis and to the galling insect activity...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28777249/isometric-mid-thigh-pull-performance-is-associated-with-athletic-performance-and-sprinting-kinetics-in-division-i-men-and-women-s-basketball-players
#4
Jeremy R Townsend, David Bender, William Vantrease, John Hudy, Kevin Huet, Cassie Williamson, Emily Bechke, Paul Serafini, Gerald T Mangine
PURPOSE: To examine the relationships between isometric mid-thigh pull (IMTP) force, athletic performance measures, and sprint kinetics in Division I men's and women's basketball players. METHODS: Twenty-three (male = 8, female = 15) division 1 basketball players completed a maximal 20-m sprint trial while tethered to a device which provided kinetic feedback (peak and average sprinting power, velocity and force). Additionally, one repetition-maximal (1RM) front squat, 1RM hang clean, vertical jump height, and agility (pro-agility and lane agility) tests were performed...
July 31, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28751265/risk-assessment-and-biomonitoring-equivalent-for-2-ethylhexyl-2-3-4-5-tetrabromobenzoate-tbb-and-tetrabromobenzoic-acid-tbba
#5
Sean M Hays, Christopher R Kirman
2-ethylhexyl-2,3,4,5 tetrabromobenzoate (TBB) is used as a flame retardant. Biomonitoring for TBB exposures include the metabolite, tetrabromobenzoic acid (TBBA), in urine. We derived a Reference Dose (RfD) for TBB and a Biomonitoring Equivalent (BE) for TBBA in urine. Three longer-term studies of oral gavage dosing of a commercial mixture BZ-54 (which includes 70% TBB) in rats were evaluated for deriving the RfD. The 95% lower confidence limits on the BMD associated with a 1 SD change from the mean (BDMLSD) values ranged from 77 to 134 mg/kg-day...
July 25, 2017: Regulatory Toxicology and Pharmacology: RTP
https://www.readbyqxmd.com/read/28746248/relationships-between-countermovement-jump-ground-reaction-forces-and-jump-height-reactive-strength-index-and-jump-time
#6
Leland A Barker, John R Harry, John A Mercer
The purpose of this study was to determine the relationship between ground reaction force (GRF) variables to jump height, jump time, and the Reactive Strength Index (RSI). Twenty-six Division I male soccer players performed three maximum effort CMJs on a dual-force platform system that measured three-dimensional kinetic data. The trial producing peak jump height was used for analysis. Vertical GRF (Fz) variables were divided into unloading, eccentric, amortization, and concentric phases and correlated to jump height, RSI (RSI= Jump height/jump time), and jump time (from start to takeoff)...
July 24, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28745469/reliability-of-bounce-drop-jump-parameters-within-elite-male-rugby-players
#7
Lisa Costley, Eric Wallace, Michael Johnston, Rodney Kennedy
BACKGROUND: The aims of the study were to investigate the number of familiarisation sessions required to establish reliability of the bounce drop jump (BDJ) and subsequent reliability once familiarisation is achieved. METHOD: Seventeen trained male athletes completed 4 BDJs in 4 separate testing sessions. Force-time data from a 20 cm BDJ was obtained using two force plates (ensuring ground contact < 250 ms). Subjects were instructed to 'jump for maximal height and minimal contact time' while the best and average of four jumps were compared...
July 25, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28737590/fiber-type-composition-and-rate-of-force-development-in-endurance-and-resistance-trained-individuals
#8
Spyridon Methenitis, Konstantinos Spengos, Nikolaos Zaras, Angeliki-Nikoletta Stasinaki, Giorgos Papadimas, Giorgos Karampatsos, Giannis Arnaoutis, Gerasimos Terzis
The purpose of the study was to investigate the relationship between muscle fiber composition and the rate of force development (RFD) in well-trained individuals with different training background. Thirty-eight young males with different training background participated: 9 endurance runners, 10 power-trained, 9 strength-trained, and 10 sedentary. They performed maximal isometric leg press for the measurement of RFD. Body composition (dual x-ray absorptiometry) and vastus lateralis fiber type composition was also evaluated...
July 19, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28735244/legacy-and-novel-brominated-flame-retardants-in-interior-car-dust%C3%A2-%C3%A2-implications-for-human-exposure
#9
Athanasios Besis, Christina Christia, Giulia Poma, Adrian Covaci, Constantini Samara
Brominated flame retardants (BFRs) are organobromine compounds with an inhibitory effect on combustion chemistry tending to reduce the flammability of products. Concerns about health effects and environmental threats have led to phase-out or restrictions in the use of Penta-, Octa- and Deca-BDE technical formulations, increasing the demand for Novel BFRs (NBFRs) as replacements for the banned formulations. This study examined the occurrence of legacy and NBFRs in the dust from the interior of private cars in Thessaloniki, Greece, aged from 1 to 19 years with variable origin and characteristics...
July 20, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28715403/improving-strength-power-muscle-aerobic-capacity-and-glucose-tolerance-through-short-term-progressive-strength-training-among-elderly-people
#10
Eva A Andersson, Per Frank, Marjan Pontén, Björn Ekblom, Maria Ekblom, Marcus Moberg, Kent Sahlin
This protocol describes the simultaneous use of a broad span of methods to examine muscle aerobic capacity, glucose tolerance, strength, and power in elderly people performing short-term resistance training (RET). Supervised progressive resistance training for 1 h three times a week over 8 weeks was performed by RET participants (71±1 years, range 65-80). Compared to a control group without training, the RET showed improvements on the measures used to indicate strength, power, glucose tolerance, and several parameters of muscle aerobic capacity...
July 5, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28689326/occurrence-and-distribution-of-organophosphate-esters-in-surface-soil-and-street-dust-from-chongqing-china-implications-for-human-exposure
#11
Ming-Jing He, Ting Yang, Zhi-Hao Yang, Qi Li, Shi-Qiang Wei
In the present study, the occurrence, concentrations, and distribution of organophosphate esters (OPEs) were studied in surface soil and street dust samples collected from different sites of Chongqing, a metropolitan city in western China. Furthermore, nondietary daily intakes (DIs) of OPEs only through dust ingestion absorption were assessed between toddlers and adults. The ∑OPEs contents ranged from 10.1 to 315 ng/g dw and from 348 to 1369 ng/g dw in surface soil and street dust samples, respectively, with tris (2-butoxyethyl) phosphate (TBOEP), the predominant OPEs in surface soil, whereas tris (chloroethyl) phosphate (TCEP) occupied a relatively high proportion in street dust samples...
July 8, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28667897/rate-of-force-development-and-muscle-activation-of-trunk-muscles-in%C3%A2-women-with-and-without-low-back-pain-a-case-control-study
#12
Denise Martineli Rossi, Mary Hellen Morcelli, Adalgiso Coscrato Cardozo, Benedito Sérgio Denadai, Mauro Gonçalves, Marcelo Tavella Navega
OBJECTIVE: To evaluate the rate of force development (RFD) and the rate of electromyography rise (RER) of global and local trunk muscles in women with and without low back pain. DESIGN: Cross-sectional study. SETTING: Laboratory setting. PARTICIPANTS: Twenty-eight women divided into low back pain (LBP, n = 14) and control groups (CG, n = 14) participated in this study. MAIN OUTCOME MEASURES: Subjects performed isometric contractions of trunk using an isokinetic dynamometer, and simultaneously the electromyography (EMG) signals were collected for global (rectus abdominis and longissimus thoracic) and local (internal oblique and multifidus) muscles...
July 2017: Physical Therapy in Sport
https://www.readbyqxmd.com/read/28606466/hip-rate-of-force-development-and-strength-are-impaired-in-females-with-patellofemoral-pain-without-signs-of-altered-gluteus-medius-and-maximus-morphology
#13
Guilherme S Nunes, Christian John Barton, Fábio Viadanna Serrão
OBJECTIVES: To compare rate of force development (RFD) and isometric muscle strength of the hip abductors and extensors; and the thickness and the amount of non-contractile tissue of the gluteus medius and maximus between females with and without patellofemoral pain (PFP). DESIGN: Cross-sectional study. METHODS: Fifty-four physically active females (27 with PFP and 27 healthy individuals) were studied. Hip muscle isometric strength and RFD was evaluated using isokinetic dynamometry...
May 24, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28595868/impaired-hip-muscle-strength-in-patients-with-femoroacetabular-impingement-syndrome
#14
Signe Kierkegaard, Inger Mechlenburg, Bent Lund, Kjeld Søballe, Ulrik Dalgas
OBJECTIVES: Patients with femoroacetabular impingement (FAI) experience hip pain as well as decreased function and lowered quality of life. The aim was to compare maximal isometric and isokinetic muscle strength (MVC) during hip flexion and extension and rate of force development (RFD) during extension between patients with FAI and a matched reference group. Secondary, the aim was to compare patient hips and subgroups defined by gender and age as well as to investigate associations between hip muscle strength and self-reported outcomes...
May 25, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28592280/white-blood-cell-count-predicts-the-odds-of-kidney-function-decline-in-a-chinese-community-based-population
#15
Fangfang Fan, Jia Jia, Jianping Li, Yong Huo, Yan Zhang
BACKGROUND: Inflammatory processes are very important in the development of kidney disease. Nevertheless, the association between white blood cell (WBC) count and the risk of renal dysfunction has not been well-established, especially in subjects without chronic kidney disease (CKD). Our study investigated the association between WBC count and kidney function decline in a Chinese community-based population with baseline estimated glomerular filtration rate (eGFR) ≥60 mL/min/1.73 m(2)...
June 7, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28589431/bone-marrow-fibrosis-at-diagnosis-predicts-survival-for-primary-acute-myeloid-leukemia
#16
Z Wu, R Chen, L Wu, L Zou, F Ding, M Wang, X Liu
PURPOSE: As a desmoplastic reaction, tissue fibrosis played crucial roles in solid tumor progression, chemo-resistance, and consequently heralded poor clinical outcome. Previous studies implied the effects of marrow fibrosis on prognosis for acute lymphoblastic leukemia were disputable. In this study, we aimed to investigate the potential role of bone marrow fibrosis on clinical survival in acute myeloid leukemia (AML) patients. METHODS: Bone marrow fibrosis (evaluated as reticulin fiber density, RFD) in bone marrow sections was evaluated at diagnosis via computer technology...
June 6, 2017: Clinical & Translational Oncology
https://www.readbyqxmd.com/read/28521193/issues-raised-by-the-reference-doses-for-perfluorooctane-sulfonate-and-perfluorooctanoic-acid
#17
Zhaomin Dong, Md Mezbaul Bahar, Joytishna Jit, Bruce Kennedy, Brian Priestly, Jack Ng, Dane Lamb, Yanju Liu, Luchun Duan, Ravi Naidu
On 25th May 2016, the U.S. EPA released reference doses (RfDs) for Perfluorooctane Sulfonate (PFOS) and Perfluorooctanoic Acid (PFOA) of 20ng/kg/day, which were much more conservative than previous values. These RfDs rely on the choices of animal point of departure (PoD) and the toxicokinetics (TK) model. At this stage, considering that the human evidence is not strong enough for RfD determination, using animal data may be appropriate but with more uncertainties. In this article, the uncertainties concerning RfDs from the choices of PoD and TK models are addressed...
May 15, 2017: Environment International
https://www.readbyqxmd.com/read/28513277/effect-of-gastrocnemius-kinesio-taping-on-countermovement-jump-performance-and-vertical-stiffness-following-muscle-fatigue
#18
Sahar Boozari, Mohammad Ali Sanjari, Ali Amiri, Ismail Ebrahimi Takamjani
CONTEXT: Kinesio Tape (KT) is a widely used intervention in the fields of sports and rehabilitation. However, its effects on lower extremity behavior during functional activities are not entirely known. OBJECTIVE: To test the hypothesis that application of KT can change performance and vertical stiffness during the countermovement jump (CMJ) before and after a fatigue protocol. DESIGN: A pre and post design to study the effect of KT in two situations, pre- and post-fatigue...
May 17, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28498325/the-health-risk-of-cd-released-from-low-cost-jewelry
#19
Miloslav Pouzar, Magdalena Zvolská, Oldřich Jarolím, Lenka Audrlická Vavrušová
The composition of the surface layer of 13 low-cost jewelry samples with a high Cd content was analyzed using an energy-dispersive X-ray fluorescence spectrometer (ED XRF). The analyzed jewels were obtained in cooperation with the Czech Environmental Inspectorate. The jewels were leached in two types of artificial sweat (acidic and alkaline) for 7 days. Twenty microliters of the resulting solution was subsequently placed on a paper carrier and analyzed by an LIBS (Laser-Induced Breakdown Spectrometry) spectrometer after drying...
May 12, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28486433/human-indoor-exposure-to-airborne-halogenated-flame-retardants-influence-of-airborne-particle-size
#20
Mark J La Guardia, Erika D Schreder, Nancy Uding, Robert C Hale
Inhalation of halogenated flame-retardants (HFRs) released from consumer products is an important route of exposure. However, not all airborne HFRs are respirable, and thus interact with vascular membranes within the gas exchange (alveolar) region of the lung. HFRs associated with large (>4 µm), inhalable airborne particulates are trapped on the mucosal lining of the respiratory tract and then are expelled or swallowed. The latter may contribute to internal exposure via desorption from particles in the digestive tract...
May 9, 2017: International Journal of Environmental Research and Public Health
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