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https://www.readbyqxmd.com/read/29778049/toxicity-screening-of-biochar-mineral-composites-using-germination-tests
#1
Jan Mumme, Josephine Getz, Munoo Prasad, Ulf Lüder, Jürgen Kern, Ondřej Mašek, Wolfram Buss
This study assessed the properties and toxicity (water cress germination trials) of 38 waste-derived, novel biochar-mineral composites (BMCs) produced via slow pyrolysis and hydrothermal carbonization (hydrochars). The biochars were produced from sewage sludge and compost-like output (CLO) by varying the type of mineral additive (zeolite, wood ash and lignite fly ash), the mineral-to-feedstock ratio and the carbonization process. While pure hydrochars completely inhibited germination of water cress, this effect was ameliorated by mineral additives...
May 8, 2018: Chemosphere
https://www.readbyqxmd.com/read/29778037/efficient-electrochemical-degradation-of-multiwall-carbon-nanotubes
#2
Vytas Reipa, Shannon K Hanna, Aaron Urbas, Lane Sander, John Elliott, Joseph Conny, Elijah J Petersen
As the production mass of multiwall carbon nanotubes (MWCNT) increases, the potential for human and environmental exposure to MWCNTs may also increase. We have shown that exposing an aqueous suspension of pristine MWCNTs to an intense oxidative treatment in an electrochemical reactor, equipped with an efficient hydroxyl radical generating Boron Doped Diamond (BDD) anode, leads to their almost complete mineralization. Thermal optical transmittance analysis showed a total carbon mass loss of over two orders of magnitude due to the electrochemical treatment, a result consistent with measurements of the degraded MWCNT suspensions using UV-vis absorbance...
April 26, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29777918/sex-differences-in-the-spatial-distribution-of-bone-in-relation-to-incident-hip-fracture-findings-from-the-ages-reykjavik-study
#3
Elisa A Marques, Julio Carballido-Gamio, Vilmundur Gudnason, Gunnar Sigurdsson, Sigurdur Sigurdsson, Thor Aspelund, Kristin Siggeirsdottir, Lenore Launer, Gudny Eiriksdottir, Thomas Lang, Tamara B Harris
In this case-cohort study, we used data-driven computational anatomy approaches to assess within and between sex spatial differences in proximal femoral bone characteristics in relation to incident hip fracture. One hundred male and 234 female incident hip fracture cases, and 1047 randomly selected noncase subcohort participants (562 female) were chosen from the population-based AGES-Reykjavik study (mean age of 77 years). The baseline -i.e. before hip fracture- hip quantitative computed tomography scans of these subjects were analyzed using voxel-based morphometry, tensor-based morphometry, and surface-based statistical parametric mapping to assess the spatial distribution of volumetric bone mineral density (vBMD), internal structure, and cortical bone properties (thickness, vBMD and trabecular vBMD adjacent to the endosteal surface) of the proximal femur, respectively, in relation to incident hip fracture...
May 16, 2018: Bone
https://www.readbyqxmd.com/read/29777633/hypertrophic-effect-of-inhaled-beta-2-agonist-with-and-without-concurrent-exercise-training-a-randomized-controlled-trial
#4
Søren Jessen, Johan Onslev, Anders Lemminger, Vibeke Backer, Jens Bangsbo, Morten Hostrup
INTRODUCTION: Due to a high prevalence of asthma and exercise-induced bronchoconstriction in elite athletes, there is a high use of beta2 -adrenoceptor agonists (beta2 -agonists) in the athletic population. While anabolic in rodents, no study has been able to detect hypertrophy in humans after chronic beta2 -agonist inhalation. METHODS: We investigated if inhaled beta2 -agonist, terbutaline, alters body composition and metabolic rate with and without concurrent exercise training in healthy young men...
May 19, 2018: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29777526/dietary-intake-and-content-of-cu-mn-fe-and-zn-in-selected-cereal-products-marketed-in-poland
#5
Anna Winiarska-Mieczan, Edyta Kowalczuk-Vasilev, Katarzyna Kwiatkowska, Małgorzata Kwiecień, Ewa Baranowska-Wójcik, Bożena Kiczorowska, Renata Klebaniuk, Wioletta Samolińska
This paper aims to verify whether cereal products are a good source of Cu, Mn, Fe, and Zn in the diets of Poles. The study material comprised of 445 cereal products including baked goods, breakfast cereals and groats, pasta, and rice. Products that required culinary treatment (pasta, groats, rice) were boiled in drinking quality water as recommended by the producer. The content of Cu, Mn, Fe, and Zn was determined by using the FAAS method. The average content of microelements in the analyzed products can be represented as Fe (17...
May 18, 2018: Biological Trace Element Research
https://www.readbyqxmd.com/read/29777507/rankl-expression-is-increased-in-circulating-mononuclear-cells-of-patients-with-calcific-aortic-stenosis
#6
Marcello Rattazzi, Elisabetta Faggin, Elisa Bertacco, Roberta Buso, Massimo Puato, Mario Plebani, Martina Zaninotto, Davide Condotta, Giacomo Zoppellaro, Leopoldo Pagliani, Giuseppe Tarantini, Sabino Iliceto, Elisa Covolo, Giuseppe Faggian, Francesco Onorati, Mikhail Dodonov, Alessandro Daniotti, Paola Pantano, Zoran Olivari, Giovanni Benfari, Paolo Pauletto
We aimed to investigate whether the expression of the OPG/RANK/RANKL triad in peripheral blood mononuclear cells (PBMC) and circulating levels of markers of ectopic mineralization (OPG, FGF-23, PPi) are modified in patients with calcific aortic valve disease (CAVD). We found that patients affected by CAVD (n = 50) had significantly higher circulating levels of OPG as compared to control individuals (p = 0.003). No differences between the two groups were found in FGF-23 and PPi levels. RANKL expression was higher in the PBMC from CAVD patients (p = 0...
May 17, 2018: Journal of Cardiovascular Translational Research
https://www.readbyqxmd.com/read/29777411/spatial-environmental-risk-evaluation-of-potential-toxic-elements-in-stream-sediments
#7
I M H R Antunes, M T D Albuquerque, N Roque
Potential toxic elements (PTE), in stream sediments, were used as contamination indicators for the definition of high-/low-grade spatial clusters in the Monfortinho area (Central Portugal). A set of 271 stream sediment samples was used for spatial modelling and further definition of rings of enrichment-high and low rings. A three-step multivariate statistical and geostatistical approach was used: (1) principal components analysis for PTE's association evaluation and dimensionality reduction; (2) ordinary kriging as an unbiased interpolator for content inference and construction of a continuous representation of the considered attributes, at any arbitrary spatial location; (3) G clustering algorithm for the definition of high and low significance clusters...
May 18, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29777408/genetic-association-analysis-of-osteopontin-and-matrix-gla-protein-genes-polymorphisms-with-primary-knee-osteoarthritis-in-mexican-population
#8
Verónica Marusa Borgonio-Cuadra, Norma Celia González-Huerta, Emma Xochitl Rojas-Toledo, Eugenio Morales-Hernández, Nonanzit Pérez-Hernández, José Manuel Rodríguez-Pérez, Carlos Alfonso Tovilla-Zárate, Thelma Beatriz González-Castro, Yazmín Hernández-Díaz, María Lilia López-Narváez, Antonio Miranda-Duarte
Primary osteoarthritis (OA) is a complex entity in which several loci related to different molecular pathways or classes of molecules are associated with its development as demonstrated through genetic association studies. Genes involved in bone formation and mineralization, such as osteopontin (OPN) and Matrix Gla protein (MGP), could also be related with OA. The aim of this study was to evaluate the association between the genetic variants of OPN and MGP with primary knee osteoarthritis in a Mexican population...
May 18, 2018: Clinical Rheumatology
https://www.readbyqxmd.com/read/29777258/development-of-a-two-stage-in-vitro-model-system-to-investigate-the-mineralization-mechanisms-involved-in-idiopathic-stone-formation-stage-1-biomimetic-randall-s-plaque-using-decellularized-porcine-kidneys
#9
Archana C Lovett, Saeed R Khan, Laurie B Gower
Idiopathic calcium oxalate (CaOx) stone formers form stones that are commonly attached to calcium phosphate (CaP) deposits in the renal tissue, known as Randall's plaques (RP). Plaques are suggested to originate in the renal tubular basement membrane, where they exhibit a morphology of concentrically laminated apatitic spherules, while in the interstitial regions, the collagen fibrils and vesicles become mineralized. We hypothesize that these minerals might form by non-classical crystallization mechanisms, such as via amorphous precursors, some of which might originate from a polymer-induced liquid-precursor (PILP) process...
May 18, 2018: Urolithiasis
https://www.readbyqxmd.com/read/29777146/formation-of-zinc-sulfide-species-during-roasting-of-zno-with-pyrite-and-its-contribution-on-flotation
#10
Yong-Xing Zheng, Jin-Fang Lv, Hua Wang, Shu-Ming Wen, Jie Pang
In this paper, formation of zinc sulfide species during roasting of ZnO with FeS2 was investigated and its contribution on flotation was illustrated. The evolution process, phase and crystal growth were investigated by thermogravimetry (TG), X-Ray diffraction (XRD) along with thermodynamic calculation and scanning electron microscopy-Energy-dispersive X-ray spectroscopy (SEM-EDS), respectively, to interpret the formation mechanism of ZnS species. It was found that ZnS was initially generated at about 450 °C and then the reaction prevailed at about 600 °C...
May 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29776756/sex-hormone-binding-globulin-is-a-biomarker-associated-with-nonvertebral-fracture-in-men-on-dialysis-therapy
#11
Jasna Aleksova, Phillip Wong, Robert McLachlan, Kay Weng Choy, Peter R Ebeling, Frances Milat, Grahame J Elder
Gonadal hormones impact bone health and higher values of sex hormone-binding globulin (SHBG) have been independently associated with fracture risk in men without chronic kidney disease. People with chronic kidney disease have a greatly increased fracture risk, and gonadal dysfunction is common in men receiving dialysis treatment. Nevertheless, in these men the effect of gonadal steroids and SHBG on bone mineral density (BMD) and fracture risk is unknown. Here we investigate relationships between gonadal steroids, SHBG, BMD and fracture in men on long-term dialysis therapy, awaiting kidney or simultaneous pancreas kidney transplantation...
May 15, 2018: Kidney International
https://www.readbyqxmd.com/read/29776736/trabecular-bone-score-at-the-distal-femur-and-proximal-tibia-in-individuals-with-spinal-cord-injury
#12
Stacey Lobos, Anne Cooke, Gillian Simonett, Chester Ho, Steven K Boyd, W Brent Edwards
Rapid declines in bone mineral density (BMD) at the knee after spinal cord injury (SCI) are associated with an increased risk of fracture. Evaluation of bone quality using the trabecular bone score (TBS) may provide a complimentary measure to BMD assessment to examine bone health and fracture risk after SCI. The purpose of this study was to assess bone mineral density (BMD) and trabecular bone score (TBS) at the knee in individuals with and without SCI. Nine individuals with complete SCI (mean time since SCI 2...
April 24, 2018: Journal of Clinical Densitometry
https://www.readbyqxmd.com/read/29776703/removal-of-aqueous-chromium-and-environmental-co-2-by-using-photocatalytic-tio-2-doped-with-tungsten
#13
M Trejo-Valdez, S R Hernández-Guzmán, M E Manriquez-Ramírez, H Sobral, H Martínez-Gutiérrez, C Torres-Torres
Removal of hexavalent chromium was accomplished by using photocatalyst materials of TiO2 doped with tungsten oxide, environmental air as oxygen supply and white light as irradiation source. Dichromate anions in concentration ranges of 50 to 1000 μg/L were removed by means of aqueous dispersions of TiO2 doped with tungsten. The aqueous chromium analyses were performed by Differential Pulse Voltammetry technique. Additionally, mineralization of CO2 gas was promoted by the photocatalysis process, as was clearly shown by Raman spectroscopy and X-ray Photoelectron Spectroscopy (XPS) analyses obtained from the TiO2 samples recovered after photocatalytic experiments...
May 15, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29776411/a-study-of-the-factors-associated-with-cervical-spinal-disc-degeneration-with-a-focus-on-bone-metabolism-and-amino-acids-in-the-japanese-population-a-cross-sectional-study
#14
Kanichiro Wada, Toshihiro Tanaka, Gentaro Kumagai, Hitoshi Kudo, Toru Asari, Daisuke Chiba, Seiya Ota, Keita Kamei, On Takeda, Shigeyuki Nakaji, Yasuyuki Ishibashi
BACKGROUND: The physical and biochemical factors responsible for cervical disc degeneration, and resulting in various spinal disorders, remain unclear. This study aimed to evaluate the correlation between cervical spinal canal stenosis and degeneration of intervertebral discs, and to analyze the factors related to disc degeneration in the Japanese population. METHODS: Three hundred and forty-four Japanese general residents underwent investigations, including magnetic resonance imaging of the cervical spine, in our health check project...
May 17, 2018: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29776006/mineralization-can-be-an-incidental-ultrasonographic-finding-in-equine-tendons-and-ligaments
#15
Etienne J O O'Brien, Roger K W Smith
Tendon/ligament mineralization is recognized in horses but information regarding its clinical significance is limited. The aims of this observational study were to report the structures most commonly affected by ultrasonographically detectable mineralization and, for these, determine frequency of diagnosis and key clinical features. Cases presented at our hospital in April 1999-April 2013 and September 2014-November 2015 were included: a total of 27 horses (22 retrospective, five prospective). Mineralizations were most common in deep digital flexor tendons (10) and suspensory ligament branches (eight), representing 10% and 7% (estimated), respectively, of horses diagnosed with injuries to these structures during the study...
May 18, 2018: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/29775914/current-radiological-situation-in-areas-of-ukraine-contaminated-by-the-chernobyl-accident-part-1-human-dietary-exposure-to-caesium-137-and-possible-mitigation-measures
#16
I Labunska, V Kashparov, S Levchuk, D Santillo, P Johnston, S Polishchuk, N Lazarev, Y Khomutinin
This study reports for the first time temporal trends for the period of 2011-2016 in 137 Cs content in cow's milk originating from private farms and households of 14 settlements located in the territories of the Rivne region, Ukraine. These areas are still radioactively contaminated as a result of the accident at the Chernobyl Nuclear Power Plant (ChNPP) in 1986. In 2016, the average 137 Cs activity concentration in milk exceeded the Ukrainian Permissible Level (PL) for adults of 100 Bq/l in samples from 6 settlements and the PL for children of 40 Bq/l in 8 settlements, reaching activity concentration of around 500 Bq/l in some samples...
May 15, 2018: Environment International
https://www.readbyqxmd.com/read/29775842/retention-of-neodymium-by-dolomite-at-variable-ionic-strength-as-probed-by-batch-and-column-experiments
#17
H P Emerson, F Zengotita, M Richmann, Y Katsenovich, D T Reed, T M Dittrich
The results presented in this paper highlight the complexity of adsorption and incorporation processes of Nd with dolomite and significantly improve upon previous work investigating trivalent actinide and lanthanide interactions with dolomite. Both batch and mini column experiments were conducted at variable ionic strength. These data highlight the strong chemisorption of Nd to the dolomite surface (equilibrium Kd 's > 3000 mL/g) and suggest that equilibrium adsorption processes may not be affected by ionic strength based on similar results at 0...
May 15, 2018: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/29775822/nanocomposite-thin-films-ag-0-np-tio-2-in-the-efficient-removal-of-micro-pollutants-from-aqueous-solutions-a-case-study-of-tetracycline-and-sulfamethoxazole-removal
#18
Alka Tiwari, Alok Shukla, Lalliansanga, Diwakar Tiwari, Seung Mok Lee
The aim of this communication is to synthesize novel Nanocomposite thin film materials (Ag0 (NP)/TiO2 ) using the template process. Surface morphology of materials was obtained by the Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) analyses. The presence of doped Ag-nanoparticles was confirmed by the TEM images along with the SEM-EDX analyses. The Atomic Force Microscopic images were demonstrated the surface roughness and thickness of Nanocomposite thin films. X-ray diffraction analysis confirmed that TiO2 was predominantly present to its anatase mineral phase...
May 15, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29775762/aortic-vascular-calcification-is-inversely-associated-with-the-trabecular-bone-score-in-patients-receiving-dialysis
#19
Jasna Aleksova, Samantha Kurniawan, Mirna Vucak-Dzumhur, Peter Kerr, Peter R Ebeling, Frances Milat, Grahame J Elder
INTRODUCTION: Progressive chronic kidney disease (CKD) confers a marked increase in risk for vascular calcification, cardiovascular disease, fracture and mortality, with likely contributing factors including dysregulated bone metabolism and mineral homeostasis. In general population studies, increased vascular calcification is directly related to mortality and inversely related to bone mineral density (BMD) measured by dual-energy X-ray absorptiometry (DXA). In patients with CKD, abnormalities in turnover, mineralization and bone volume, reduce the ability of DXA to predict fracture...
May 15, 2018: Bone
https://www.readbyqxmd.com/read/29775648/towards-a-quantitative-model-to-predict-the-toxicity-pathogenicity-potential-of-mineral-fibers
#20
Alessandro F Gualtieri
A number of mineral fibers represent a health hazard because they are classified as cancer-causing chemical/physical toxicants upon (chronic) dust inhalation. Although in the last decades they have been the subject of intensive multidisciplinary investigations, the mechanisms by which mineral fibers induce toxic and pathogenic adverse effects on human health and environment are not yet fully understood. The major intricacy of the biological approach that prevents the design of a conclusive shared model of behavior of mineral fibers in a biological system stems from their very nature with intrinsic variability in chemical, molecular, structural and morphometric parameters, biodurability and surface reactivity...
May 15, 2018: Toxicology and Applied Pharmacology
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