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https://www.readbyqxmd.com/read/28091885/assessing-the-impact-of-preload-on-pyrite-rich-sediment-and-groundwater-quality
#1
Ohene Karikari-Yeboah, Jonas Addai-Mensah
Pyrite-rich sediments would, invariably, undergo redox reactions which would lead to acidic aqueous environment containing solubilized toxic metal species. When such sediments are subjected to preload, a technique employed by geotechnical engineers to improve the load-bearing capacity of highly compressible formation, transient flow of pore water, accompanied by acidity transfer, would occur as a response. Despite the concomitant environmental and socio-economic significance, to date, there has been limited interdisciplinary research on the underpinning geotechnical engineering and geo-environmental science issues for pyrite-rich sediments under preload...
February 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28088182/overexpression-of-wheat-ferritin-gene-tafer-5b-enhances-tolerance-to-heat-stress-and-other-abiotic-stresses-associated-with-the-ros-scavenging
#2
Xinshan Zang, Xiaoli Geng, Fei Wang, Zhenshan Liu, Liyuan Zhang, Yue Zhao, Xuejun Tian, Zhongfu Ni, Yingyin Yao, Mingming Xin, Zhaorong Hu, Qixin Sun, Huiru Peng
BACKGROUND: The yield of wheat (Triticum aestivum L.), an important crop, is adversely affected by heat stress in many regions of the world. However, the molecular mechanisms underlying thermotolerance are largely unknown. RESULTS: A novel ferritin gene, TaFER, was identified from our previous heat stress-responsive transcriptome analysis of a heat-tolerant wheat cultivar (TAM107). TaFER was mapped to chromosome 5B and named TaFER-5B. Expression pattern analysis revealed that TaFER-5B was induced by heat, polyethylene glycol (PEG), H2O2 and Fe-ethylenediaminedi(o-hydroxyphenylacetic) acid (Fe-EDDHA)...
January 14, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/28079005/dendritic-cells-modulate-iron-homeostasis-and-inflammatory-abilities-following-quercetin-exposure
#3
Vanessa Galleggiante, Stefania De Santis, Elisabetta Cavalcanti, Aurelia Scarano, Maria De Benedictis, Grazia Serino, Maria Lucia Caruso, Mauro Mastronardi, Aldo Pinto, Pietro Campiglia, Dale Kunde, Angelo Santino, Marcello Chieppa
BACKGROUND: Fruit and vegetables are rich in plant polyphenols, whose consumption is encouraged in healthy dietary regimes due to their antioxidants and anti-inflammatory effects. These organic molecules exhibit numerous properties including phylochelation; the ability to create complex with metal ions. Among polyphenols, we focused our attention to quercetin that previously demonstrated its ability to reduce dendritic cells (DCs) inflammatory cytokine secretion and antigen presentation following LPS exposure...
January 12, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28075577/reversible-unfolding-and-folding-of-the-metalloprotein-ferredoxin-revealed-by-single-molecule-atomic-force-microscopy
#4
Hai Lei, Yabin Guo, Xiaodong Hu, Chunguang Hu, Xiaotang Hu, Hongbin Li
Plant type [2Fe-2S] ferredoxins function primarily as electron transfer proteins in photosynthesis. Studying the unfolding-folding of ferredoxins in vitro is challenging, since the unfolding of ferredoxin is often irreversible due to the loss or disintegration of the iron-sulfur cluster. Additionally, the in vivo folding of holo-ferredoxin requires ferredoxin biogenesis proteins. Here we employed atomic force microscopy-based single molecule force microscopy and protein engineering techniques to directly study the mechanical unfolding and refolding of a plant type [2Fe-2S] ferredoxin from cyanobacteria Anabaena...
January 11, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28071032/legume-seeds-and-cereal-grains-capacity-to-accumulate-iron-while-sprouting-in-order-to-obtain-food-fortificant
#5
Magdalena Zielińska-Dawidziak, Halina Staniek, Ewelina Król, Dorota Piasecka-Kwiatkowska, Tomasz Twardowski
BACKGROUND: Prepared sprouts, after culturing in a medium with an increased iron concentration, could become a beneficial food iron fortificant. However, the efficient iron accumulation depends on the plants genus, species and/or varieties. The aim of the study was to indicate the seeds or grains which accumulate iron most efficiently during the sprouting process. METHODS: Alfalfa, lentil, lupine and soybean seeds as well as wheat grains were sprouted in abiotic stress conditions induced by the excess of iron(II) in culture media...
July 2016: Acta Scientiarum Polonorum. Technologia Alimentaria
https://www.readbyqxmd.com/read/28068635/inositol-hexa-phosphoric-acid-phytic-acid-a-nutraceuticals-attenuates-iron-induced-oxidative-stress-and-alleviates-liver-injury-in-iron-overloaded-mice
#6
Anwesha Bhowmik, Durbadal Ojha, Debayan Goswami, Rashmi Das, Nidhi S Chandra, Tapan K Chatterjee, Amit Chakravarty, Sudipa Chakravarty, Debprasad Chattopadhyay
Inositol hexa phosphoric acid (IP6) or Phytic acid, a natural antioxidant of some leguminous plants, known to act as a protective agent for seed storage in plants by suppressing iron catalyzed oxidative process. Following the same mechanism, we have tested the effect of IP6 on iron overloaded in vitro oxidative stress, and studied it's in vivo hepatoprotective ability in iron-dextran (injection)-induced iron overloaded liver injury in mice (intraperitoneal). Our results showed that IP6 had in vitro iron chelation (IC50 38...
January 6, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28065924/gibberellins-regulate-iron-deficiency-response-by-influencing-iron-transport-and-translocation-in-rice-seedlings-oryza-sativa
#7
Baolan Wang, Haifang Wei, Zhen Xue, Wen-Hao Zhang
BACKGROUND AND AIMS: Gibberellins (GAs) are a class of plant hormones with diverse functions. However, there has been little information on the role of GAs in response to plant nutrient deficiency. METHODS: To evaluate the roles of GAs in regulation of Fe homeostasis, the effects of GA on Fe accumulation and Fe translocation in rice seedlings were investigated using wild-type, a rice mutant (eui1) displaying enhnaced endogenous GA concentrations due to a defect in GA deactivation, and transgenic rice plants overexpressing OsEUI KEY RESULTS: Exposure to Fe-deficient medium significantly reduced biomass of rice plants...
January 8, 2017: Annals of Botany
https://www.readbyqxmd.com/read/28063313/desulfurization-critical-step-towards-enhanced-selenium-removal-from-industrial-effluents
#8
Lucian C Staicu, Nadia Morin-Crini, Grégorio Crini
Selenium (Se) removal from synthetic solutions and from real Flue Gas Desulfurization (FGD) wastewater generated by a coal-fired power plant was studied for the first time using a commercial iron oxide impregnated strong base anion exchange resin, Purolite(®) FerrIX A33E. In synthetic solutions, the resin showed high affinity for selenate and selenite, while sulfate exhibited a strong competition for both oxyanions. The FGD wastewater investigated is a complex system that contains Se (∼1200 μg L(-1)), SO4(2-) (∼1...
December 29, 2016: Chemosphere
https://www.readbyqxmd.com/read/28063294/the-effect-of-coagulants-and-antiscalants-discharged-with-seawater-desalination-brines-on-coastal-microbial-communities-a-laboratory-and-in-situ-study-from-the-southeastern-mediterranean
#9
Natalia Belkin, Eyal Rahav, Hila Elifantz, Nurit Kress, Ilana Berman-Frank
Desalination outflows frequently discharge brine containing coagulants and antiscalants (e.g. Iron-hydroxides and polyphosphonates) to the coastal environment. Here we examined changes in composition and productivity of natural microbial coastal communities in experimental mesocosms treated with either iron-hydroxide (Fe), polyphosphonate (Pn), or a combination of high salinities with both chemicals (All). Within 2 h of addition Fe already altered the microbial community composition, enhanced the bacterial production (BP) and cell specific production (BP/BA), and decreased primary production...
December 10, 2016: Water Research
https://www.readbyqxmd.com/read/28056265/-a-cohort-study-on-occupational-noise-induced-hearing-loss-in-workers-at-an-iron-and-steel-plant
#10
S F Yu, G S Chen, J Jiao, G Z Gu, H L Zhang, X M Wang, W H Zhou, H Wu, Y H Li, Y X Zheng
Objective: To analyze the incidence rate of occupational noise-induced hearing loss in noise-exposed workers in an iron and steel plant from 2006 to 2015. Methods: Using a cohort study method, workers exposed to occupational noise from Jan 1, 2006 to Dec 12, 2015 were followed up and the pure tone hearing test was conducted. In total, 6 297 subjects completed two or more physical checks and the pure tone hearing test and were included in the analysis. The noise exposure level at the workplace and the equivalent continuous A-weighted sound pressure level for workers was monitored and the cumulative noise exposure dose was evaluated...
January 6, 2017: Zhonghua Yu Fang Yi Xue za Zhi [Chinese Journal of Preventive Medicine]
https://www.readbyqxmd.com/read/28053647/the-plant-leaf-movement-analyzer-palma-a-simple-tool-for-the-analysis-of-periodic-cotyledon-and-leaf-movement-in-arabidopsis-thaliana
#11
Lucas Wagner, Christoph Schmal, Dorothee Staiger, Selahattin Danisman
BACKGROUND: The analysis of circadian leaf movement rhythms is a simple yet effective method to study effects of treatments or gene mutations on the circadian clock of plants. Currently, leaf movements are analysed using time lapse photography and subsequent bioinformatics analyses of leaf movements. Programs that are used for this purpose either are able to perform one function (i.e. leaf tip detection or rhythm analysis) or their function is limited to specific computational environments...
2017: Plant Methods
https://www.readbyqxmd.com/read/28052501/effects-of-sulfate-and-sulfide-on-the-life-cycle-of-zizania-palustris-in-hydroponic-and-mesocosm-experiments
#12
John Pastor, Brad Dewey, Nathan W Johnson, Edward B Swain, Philip Monson, Emily B Peters, Amy Myrbo
Under oxygenated conditions, sulfate is relatively non-toxic to aquatic plants. However, in water-saturated soils, which are usually anoxic, sulfate can be reduced to toxic sulfide. Although the direct effects of sulfate and sulfide on the physiology of a few plant species have been studied in some detail, their cumulative effects on a plant's life cycle through inhibition of seed germination, seedling survival, growth, and seed production have been less well studied. We investigated the effect of sulfate and sulfide on the life cycle of wild rice (Zizania palustris L...
January 2017: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/28052433/diverse-functions-of-multidrug-and-toxin-extrusion-mate-transporters-in-citric-acid-efflux-and-metal-homeostasis-in-medicago-truncatula
#13
Junjie Wang, Qiuqiang Hou, Penghui Li, Lina Yang, Xuecheng Sun, Vagner A Benedito, Jiangqi Wen, Beibei Chen, Kirankumar S Mysore, Jian Zhao
The MATE transporter family comprises 70 members in the Medicago truncatula genome, and they play seemingly important, yet mostly uncharacterized, physiological functions. Here, we employed bioinformatics and molecular genetics to identify and characterize MATE transporters involved in citric acid export, Al(3+) tolerance and Fe translocation. MtMATE69 is a citric acid transporter induced by Fe-deficiency. Overexpression of MtMATE69 in hairy roots altered Fe homeostasis and hormone levels under Fe-deficient or Fe-oversupplied conditions...
January 4, 2017: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/28051295/long-term-immobilization-of-technetium-via-bioremediation-with-slow-release-substrates
#14
Laura Newsome, Adrian Cleary, Katherine Morris, Jonathan R Lloyd
Radionuclides are present in groundwater at contaminated nuclear facilities with technetium-99 one of the most mobile radionuclides encountered. In situ bioremediation via the generation of microbially-reducing conditions has the potential to remove aqueous and mobile Tc(VII) from groundwater as insoluble Tc(IV). However, questions remain regarding the optimal methods of biostimulation and the stability of reduced Tc(IV) phases under oxic conditions. Here, we selected a range of slow-release electron donor / chemical reduction based substrates available for contaminated land treatment, and assessed their potential to stimulate the formation of recalcitrant Tc(IV) biominerals under conditions relevant to radioactively contaminated land...
January 4, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28051246/in-vitro-antioxidant-and-antihemolytic-effects-of-the-essential-oil-and-methanolic-extract-of-allium-rotundum-l
#15
S Assadpour, S M Nabavi, S F Nabavi, A A Dehpour, M A Ebrahimzadeh
OBJECTIVE: A plethora of scientific evidence showed that several plant species from the genus Allium (Alliaceae) possess multiple therapeutic effects. Present paper aimed to examine the antioxidant and antihemolytic activities of the essential oil and methanol extract Allium rotundum L. through different in vitro assays. MATERIALS AND METHODS: 1,1-diphenyl-2-picryl hydroxyl radical (DPPH), nitric oxide as well as hydrogen peroxide scavenging, Fe2+ chelating, reducing power and also hemoglobin-induced linoleic acid peroxidation assay systems have been utilized to examine antioxidant effects of these samples...
December 2016: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28048936/carbon-bound-iron-oxide-nanoparticles-prevent-calcium-induced-iron-deficiency-in-oryza-sativa-l-%C3%A2
#16
Abin Sebastian, Ashwini Nangia, M N V Prasad
Iron-based nanocomposites can be a practical solution to combat iron deficiency in calcareous agricultural soil. In the present study, a carbon-bound iron oxide nanoparticle is synthesized by mixing ferric chloride and caffeic acid and tested to correct Ca-inducible Fe deficiency in rice. Physicochemical characterization points that the nanoparticle is carbon-coated semi-crystalline Fe3O4. It is found that nanoparticle amendment enhances bioproductivity, photosynthetic electron transport, antioxidant enzyme activity, and Fe accumulation under Ca stress...
January 12, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28042856/effect-of-selected-plant-phenolics-on-fe-2-edta-h%C3%A2-o%C3%A2-system-mediated-deoxyribose-oxidation-molecular-structure-derived-relationships-of-anti-and-pro-oxidant-actions
#17
Jeffrey de Graft-Johnson, Dariusz Nowak
In the presence of transition metal ions and peroxides, polyphenols, well-known dietary antioxidants, can act as pro-oxidants. We investigated the effect of 13 polyphenols and their metabolites on oxidative degradation of deoxyribose by an (•)OH generating Fenton system (Fe(2+)-ethylenediaminetetraacetic acid (EDTA)-H₂O₂). The relationship between phenolics pro-oxidant/anti-oxidant effects and their molecular structure was analyzed using multivariate analysis with multiple linear regression and a backward stepwise technique...
December 31, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28040226/cadmium-uptake-by-cocoa-trees-in-agroforestry-and-monoculture-systems-under-conventional-and-organic-management
#18
A Gramlich, S Tandy, C Andres, J Chincheros Paniagua, L Armengot, M Schneider, R Schulin
Cadmium (Cd) uptake by cocoa has recently attracted attention, after the European Union (EU) decided to establish values for tolerable Cd concentrations in cocoa products. Bean Cd concentrations from some cocoa provenances, especially from Latin America, were found to exceed these values. Cadmium uptake by cocoa is expected not only to depend on a variety of soil factors, but also on plant and management factors. In this study, we investigated the influence of different production systems on Cd uptake by cocoa in a long-term field trial in the Alto Beni Region of Bolivia, where cocoa trees are grown in monocultures and in agroforestry systems, both under organic and conventional management...
December 28, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/28036380/two-component-signaling-system-vgrrs-directly-senses-extracytoplasmic-and-intracellular-iron-to-control-bacterial-adaptation-under-iron-depleted-stress
#19
Li Wang, Yue Pan, Zhi-Hui Yuan, Huan Zhang, Bao-Yu Peng, Fang-Fang Wang, Wei Qian
Both iron starvation and excess are detrimental to cellular life, especially for animal and plant pathogens since they always live in iron-limited environments produced by host immune responses. However, how organisms sense and respond to iron is incompletely understood. Herein, we reveal that in the phytopathogenic bacterium Xanthomonas campestris pv. campestris, VgrS (also named ColS) is a membrane-bound receptor histidine kinase that senses extracytoplasmic iron limitation in the periplasm, while its cognate response regulator, VgrR (ColR), detects intracellular iron excess...
December 2016: PLoS Pathogens
https://www.readbyqxmd.com/read/28024209/influence-and-interaction-of-iron-and-cadmium-on-photosynthesis-and-antioxidative-enzymes-in-two-rice-cultivars
#20
Houjun Liu, Chengxin Zhang, Junmei Wang, Chongjun Zhou, Huan Feng, Manoj D Mahajan, Xiaori Han
In this study, a soil pot experiment was conducted to investigate the changes in photosynthesis and antioxidative enzymes in two rice varieties (Shendao 6 and Shennong 265) supplied with iron (Fe), cadmium (Cd), and Fe and Cd together. The concentrations of Fe and Cd in the soil were 0, 1.0 g Fe·kg(-1) and 0, 2.0 mg Cd·kg(-1), respectively. Photosynthetic indices and antioxidative enzyme activities were recorded at different rice growth stages. At the early stage, Cd showed a transient stimulatory effect on the photosynthetic rate of Shennong 265...
December 20, 2016: Chemosphere
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