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https://www.readbyqxmd.com/read/28324839/contributions-of-trace-elements-to-the-sea-by-small-uncontaminated-rivers-effects-of-a-water-reservoir-and-a-wastewater-treatment-plant
#1
Miguel Ángel Álvarez-Vázquez, Ricardo Prego, Miguel Caetano, Elena De Uña-Álvarez, Maryló Doval, Susana Calvo, Carlos Vale
Trace element contributions from small rivers to estuaries is an issue barely addressed in the literature. In this work, freshwater flowing into the Ria of Cedeira (NW Iberian Peninsula) was studied during a hydrological year through the input from three rivers, one considered uncontaminated (the Das-Mestas River), a second affected by urban treated wastewater discharges (the Condomiñas River), and the third containing a water reservoir for urban supply (the Forcadas River). With the objective of assessing the possible influence of human pressure, the annual yields for selected trace elements (Al, Fe, As, Cd, Co, Cr, Cu, Mn, Mo, Ni and Pb) were estimated and compared by normalizing by basin surface...
March 15, 2017: Chemosphere
https://www.readbyqxmd.com/read/28324253/the-relationship-between-mineral-contents-particle-matter-and-bottom-ash-distribution-during-pellet-combustion-molar-balance-and-chemometric-analysis
#2
Mejdi Jeguirim, Nesrine Kraiem, Marzouk Lajili, Chamseddine Guizani, Antonis Zorpas, Yann Leva, Laure Michelin, Ludovic Josien, Lionel Limousy
This paper aims to identify the correlation between the mineral contents in agropellets and particle matter and bottom ash characteristics during combustion in domestic boilers. Four agrifood residues with higher mineral contents, namely grape marc (GM), tomato waste (TW), exhausted olive mill solid waste (EOMSW) and olive mill wastewater (OMWW), were selected. Then, seven different pellets were produced from pure residues or their mixture and blending with sawdust. The physico-chemical properties of the produced pellets were analysed using different analytical techniques, and a particular attention was paid to their mineral contents...
March 21, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28324147/genotoxicity-kinetics-in-murine-normoblasts-as-an-approach-for-the-in-vivo-action-of-difluorodeoxycytidine
#3
Pedro Morales-Ramírez, Teresita Vallarino-Kelly, Virginia Cruz-Vallejo
PURPOSE: This study analyzed the kinetics of in vivo micronucleus induction in normoblasts by determining the kinetics of difluorodeoxycytidine (dFdC)-induced micronucleated polychromatic erythrocytes (MN-PCEs) in the peripheral blood of mice. The kinetic indexes of MN-PCE induction of dFdC were correlated with the previously reported mechanisms DNA damage induction by this compound. In general, this study aimed to establish an in vivo approach for discerning the processes underlying micronucleus induction by antineoplastic agents or mutagens in general...
March 21, 2017: Cancer Chemotherapy and Pharmacology
https://www.readbyqxmd.com/read/28323535/effector-gene-suites-in-some-soil-isolates-of-fusarium-oxysporum-are-not-sufficient-predictors-of-vascular-wilt-in-tomato
#4
Nicolas Jelinski, Karen Broz, Wilfried Jonkers, Li-Jun Ma, Harold Corby Kistler
Seventy-four F. oxysporum soil isolates were assayed for known effector genes present in an F. oxysporum f.sp. lycopersici race 3 tomato wilt strain (FOL MN-25) obtained from the same fields in Manatee County, Florida. Based on the presence or absence of these genes, four haplotypes were defined, two of which represented 96% of the surveyed isolates. These two most common effector haplotypes contained either all or none of the assayed race 3 effector genes. We hypothesized that soil isolates with all surveyed effector genes, similar to FOL MN-25, would be pathogenic toward tomato, whereas isolates lacking all effectors would be non-pathogenic...
March 21, 2017: Phytopathology
https://www.readbyqxmd.com/read/28319862/multi-phase-distribution-and-comprehensive-ecological-risk-assessment-of-heavy-metal-pollutants-in-a-river-affected-by-acid-mine-drainage
#5
Jianbo Liao, Xuan Ru, Binbin Xie, Wanhui Zhang, Haizhen Wu, Chaofei Wu, Chaohai Wei
To date, there is a lack of a comprehensive research on heavy metals detection and ecological risk assessment in river water, sediments, pore water (PW) and suspended solids (SS). Here, the concentrations of heavy metals, including Cu, Zn, Mn, Cd, Pb and As, and their distribution between the four phases was studied. Samples for analysis were taken from twelve sites of the Hengshi River, Guangdong Province, China, during the rainy and dry seasons. A new comprehensive ecological risk index (CERI) based on considering metal contents, pollution indices, toxicity coefficients and water categories is offered for prediction of potential risk on aquatic organisms...
March 16, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28319742/biochar-provides-a-safe-and-value-added-solution-for-hyperaccumulating-plant-disposal-a-case-study-of-phytolacca-acinosa-roxb-phytolaccaceae
#6
Shengsen Wang, Bin Gao, Yuncong Li, Yong Sik Ok, Chaofeng Shen, Shengguo Xue
In this work, an innovative approach using biochar technology for hyperaccumulator disposal was developed and evaluated. The heavy metal enriched P. acinosa biomass (PBM) was pyrolyzed to produce biochar (PBC). Both PBM and PBC were characterized with X-ray diffraction (XRD) for crystal phases, scanning electron microscopy (SEM) for surface topography, and analyzed for elemental composition and mobility. The results revealed that whewellite, a dominant crystal form in biomass, was decomposed to calcite after pyrolysis...
February 27, 2017: Chemosphere
https://www.readbyqxmd.com/read/28319299/manganese-catalyzed-n-formylation-of-amines-by-methanol-liberating-h2-a-catalytic-and-mechanistic-study
#7
Subrata Chakraborty, Urs Gellrich, Yael Diskin-Posner, Gregory Leitus, Liat Avram, David Milstein
The first example of a base metal (manganese) catalyzed acceptorless dehydrogenative coupling of methanol and amines to form formamides is reported herein. The novel pincer complex (iPr-PN(H) P)Mn(H)(CO)2 catalyzes the reaction under mild conditions in the absence of any additives, bases, or hydrogen acceptors. Mechanistic insight based on the observation of an intermediate and DFT calculations is also provided.
March 20, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28319139/identification-of-cell-morphology-parameters-from-automatic-hematology-analyzers-to-predict-the-peripheral-blood-cd34-positive-cell-count-after-mobilization
#8
Saeam Shin, Sung Ran Cho, Sinyoung Kim, Jong Rak Choi, Kyung-A Lee
Optimal timing of apheresis initiation is important for maximizing the hematopoietic stem cell (HSC) yield. This study aimed to identify useful parameters from automatic hematology analyzers for predicting the peripheral blood CD34+ cell count after mobilization. We prospectively enrolled 53 healthy donors and 72 patients, and evaluated 43 cell morphology parameters from Unicel DxH800 (Beckman Coulter, USA) and Advia 2120i (Siemens Healthcare Diagnostics, USA). The correlation of each parameter with the CD34+ cell count in pre-apheresis blood samples was analyzed...
2017: PloS One
https://www.readbyqxmd.com/read/28318794/ethylenediaminedisuccinic-acid-edds-enhances-phytoextraction-of-lead-by-vetiver-grass-from-contaminated-residential-soils-in-a-panel-study-in-the-field
#9
Ramesh Attinti, Kirk R Barrett, Rupali Datta, Dibyendu Sarkar
Phytoextraction is a green remediation technology for cleaning contaminated soils. Application of chelating agents increases metal solubility and enhances phytoextraction. Following a successful greenhouse experiment, a panel study under field weather elucidated the efficiency of the chelating agent ethylenediaminedisuccinic acid (EDDS) on phytoextraction of lead (Pb) by vetiver grass, a hyperaccumulator of Pb, and a nonaccumulator fescue grass from residential soils contaminated with Pb-based paint from Baltimore, MD and San Antonio, TX...
March 16, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28318602/metals-hormones-and-sexual-maturation-in-flemish-adolescents-in-three-cross-sectional-studies-2002-2015
#10
Sam De Craemer, Kim Croes, Nicolas van Larebeke, Stefaan De Henauw, Greet Schoeters, Eva Govarts, Ilse Loots, Tim Nawrot, Vera Nelen, Elly Den Hond, Liesbeth Bruckers, Yue Gao, Willy Baeyens
Sex hormone levels and timing of sexual maturation are considered important markers for health status of adolescents in puberty, and previous research suggests they might be influenced by metal exposure. In three campaigns of the Flemish Environment and Health Study (FLEHS I 2002-2006; FLEHS II 2007-2011 and FLEHS III 2012-2015), data were collected on internal exposure to metals (Cd, Cu, Pb, Cr, Mn, Tl, Ni, Sb, Hg, As and As species) and sexual maturation in 2671 14-15years old adolescents. All metals were measured in blood and/or urine, except total- and methylmercury which were measured in hair samples...
March 17, 2017: Environment International
https://www.readbyqxmd.com/read/28318352/the-role-of-nlrp3-casp1-in-inflammasome-mediated-neuroinflammation-and-autophagy-dysfunction-in-manganese-induced-hippocampal-dependent-impairment-of-learning-and-memory-ability
#11
Diya Wang, Jianbin Zhang, Wenkai Jiang, Zipeng Cao, Fang Zhao, Tongjian Cai, Michael Aschner, Wenjing Luo
Central nervous system (CNS) inflammation and autophagy dysfunction are known to be involved in the pathology of neurodegenerative diseases. Manganese (Mn), a neurotoxic metal, has the potential to induce microglia-mediated neuroinflammation as well as autophagy dysfunction. NLRP3 (NLR family, pyrin domain containing 3)- CASP1 (caspase 1) inflammasome-mediated neuroinflammation in microglia has specific relevance to neurological diseases. However, the mechanism driving these phenomena remains poorly understood...
February 27, 2017: Autophagy
https://www.readbyqxmd.com/read/28318219/structural-exfoliation-of-layered-cathode-under-high-voltage-and-its-suppression-by-interface-film-derived-from-electrolyte-additive
#12
Yunmin Zhu, Xueyi Luo, Huozhen Zhi, Xuerui Yang, Lidan Xing, Youhao Liao, Mengqing Xu, Weishan Li
Layered cathodes for lithium-ion battery, including LiCo1-x-yNixMnyO2 and xLi2MnO3·(1-x) LiMO2 (M=Mn, Ni and Co), are attractive for large scale applications such as electric vehicles, because they can deliver additional specific capacity when the end of charge voltage is improved to over 4.2 V. However, operation under a high voltage might cause capacity decaying of layered cathodes during cycling. The failure mechanisms that have been given, up to date, include the electrolyte oxidation decomposition, the Ni, Co or Mn ion dissolution and the phase transformation...
March 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28318091/insulin-responsive-glucagon-delivery-for-prevention-of-hypoglycemia
#13
Jicheng Yu, Yuqi Zhang, Wujin Sun, Anna R Kahkoska, Jinqiang Wang, John B Buse, Zhen Gu
Hypoglycemia, the state of abnormally low blood glucose level, is an acute complication of insulin and sulfonylurea therapy in diabetes management. Frequent insulin dosing and boluses during daily diabetes care leads to an increased risk of dangerously low glucose levels, which can cause behavioral and cognitive disturbance, seizure, coma, and even death. This study reports an insulin-responsive glucagon delivery method based on a microneedle (MN)-array patch for the prevention of hypoglycemia. The controlled release of glucagon is achieved in response to elevated insulin concentration by taking advantage of the specific interaction between insulin aptamer and target insulin...
March 20, 2017: Small
https://www.readbyqxmd.com/read/28318016/the-transporter-synpam71-is-located-in-the-plasma-membrane-and-thylakoids-and-mediates-manganese-tolerance-in-synechocystis-pcc6803
#14
Chiara Gandini, Sidsel Birkelund Schmidt, Søren Husted, Anja Schneider, Dario Leister
Manganese (Mn) is an essential constituent of photosystem II (PSII) and therefore indispensable for oxygenic photosynthesis. Very little is known about how Mn is transported, delivered and retained in photosynthetic cells. Recently, the thylakoid-localized transporter PAM71 has been linked to chloroplast Mn homeostasis in Arabidopsis thaliana. Here, we characterize the function of its homolog in Synechocystis (SynPAM71). We used a loss-of-function line (ΔSynPAM71), wild-type (WT) cells exposed to Mn stress and strains expressing a tagged variant of SynPAM71 to characterize the role of SynPAM71 in cyanobacterial Mn homeostasis...
March 20, 2017: New Phytologist
https://www.readbyqxmd.com/read/28317966/ethylene-polymerization-catalyzed-by-bridging-ni-zn-heterobimetallics
#15
Hsin-Chun Chiu, Arijit Koley, Peter L Dunn, Ryan J Hue, Ian A Tonks
The effect of proximal Zn halides on Ni-catalyzed ethylene polymerization is reported in this work. A series of (NON)NiLX (NON = 2,6-bis-((2,6-diisopropylphenyl)imino)methyl phenoxide; LX = methallyl or L = py, X = tolyl, 2-4) ethylene polymerization precatalysts have been synthesized, as well as a heterobimetallic Ni/Zn complex, (NON)Ni(C4H7)ZnBr2 (5). Each precatalyst could be activated (or promoted) by ZnX2 (X = Cl, Br, Et) to polymerize ethylene. In situ recruitment of ZnX2 by the free imine binding pocket of the NON complexes results in the generation of heterobimetallic active species that produce lower Mn polyethylene than monometallic controls...
March 20, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28317859/physiological-and-transcriptional-approaches-reveal-connection-between-nitrogen-and-manganese-cycles-in-shewanella-algae-c6g3
#16
Axel Aigle, Patricia Bonin, Chantal Iobbi-Nivol, Vincent Méjean, Valérie Michotey
To explain anaerobic nitrite/nitrate production at the expense of ammonium mediated by manganese oxide (Mn(IV)) in sediment, nitrate and manganese respirations were investigated in a strain (Shewanella algae C6G3) presenting these features. In contrast to S. oneidensis MR-1, a biotic transitory nitrite accumulation at the expense of ammonium was observed in S. algae during anaerobic growth with Mn(IV) under condition of limiting electron acceptor, concomitantly, with a higher electron donor stoichiometry than expected...
March 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28317281/comparison-of-dietary-polyphenols-for-protection-against-molecular-mechanisms-underlying-non-alcoholic-fatty-liver-disease-in-a-cell-model-of-steatosis
#17
Hossein Rafiei, Kosar Omidian, Brian Bandy
SCOPE: Dietary polyphenols have shown promise in protecting the liver against non-alcoholic fatty liver disease. The relative effectiveness and mechanisms of different polyphenols however is mostly unknown. METHODS AND RESULTS: In a model of steatosis using HepG2 hepatocytes, we evaluated the protective effects of different classes of polyphenols and the contributing mechanisms. Treatment of the cells with oleic acid increased ROS generation and expression of TNFα, decreased expression of UCP2 and decreased mitochondrial content and markers of biogenesis...
March 20, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/28317051/photochemically-assisted-fast-abiotic-oxidation-of-manganese-and-formation-of-%C3%AE-mno2-nanosheets-in-nitrate-solution
#18
Haesung Jung, Tandeep S Chadha, Doyoon Kim, Pratim Biswas, Young-Shin Jun
This study introduces a new and previously unconsidered fast abiotic formation of Mn(iv) oxides. We report photochemically assisted fast abiotic oxidation of Mn(2+) (aq) to Mn(iv) (s) by superoxide radicals generated from nitrate photolysis. This photochemical pathway generates randomly stacked layered birnessite (δ-MnO2) nanosheets.
March 20, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28316048/toxic-elements-and-bio-metals-in-cantharellus-mushrooms-from-poland-and-china
#19
Jerzy Falandysz, Maria Chudzińska, Danuta Barałkiewicz, Małgorzata Drewnowska, Anetta Hanć
Data on multi-trace element composition and content relationships have been obtained for Cantharellus cibarius, C. tubaeformis, and C. minor mushrooms from Poland and China by inductive coupled plasma-dynamic reaction cell-mass spectroscopy. There is no previous data published on As, Li, V, Tl, and U in chanterelles from Poland and on Ba, Co, Cr, Ni, Rb, and Sr in chanterelles from China. The results implied a role of the soil background geochemistry at the collection site with the occurrence of Ag, As, Ba, Cr, Cs, Li, Mn, Pb, Rb, Sr, U, and V in the fruiting bodies...
March 18, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28316005/purification-kinetic-and-thermodynamic-characteristics-of-an-exo-polygalacturonase-from-penicillium-notatum-with-industrial-perspective
#20
Faiza Amin, Haq Nawaz Bhatti, Muhammad Bilal, Muhammad Asgher
An extracellular exo-polygalacturonase (exo-PG) produced by Penicillium notatum was purified (3.07-folds) by ammonium sulfate fractionation, ion exchange, and gel filtration chromatography. Two distinct isoforms of the enzyme, namely exo-PGI and exo-PGII, were identified during column purification with molecular weights of 85 and 20 kDa, respectively, on sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE). The enzyme displayed its optimum activity at pH 6.0 and 50 °C and was found to be stable in the slightly acidic pH (ranging from 4...
March 18, 2017: Applied Biochemistry and Biotechnology
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