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https://www.readbyqxmd.com/read/29778679/efficient-metal-adsorption-and-microbial-reduction-from-rawal-lake-wastewater-using-metal-nanoparticle-coated-cotton
#1
Attarad Ali, Ayesha Gul, Abdul Mannan, Muhammad Zia
This study was designed to investigate removal of toxic metals and reduction of bacterial count from Rawal Lake wastewater with novel nanocomposite sorbents. Iron, zinc and silver oxide nanoparticles (NPs) were attached on cotton. The nanocomposites (iron NPs on cotton (FeCt), zinc NPs on cotton (ZnCt) and silver NPs on cotton (AgCt)) were characterized by FTIR, XRD and SEM, which showed successful adsorption of 10-30 nm size nanoparticles. Batch experiments were performed to determine the adsorption capacity of nanocomposite for metal removal...
May 17, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29778215/anaerobic-bacterial-response-to-nitrosative-stress
#2
Jeffrey A Cole
This chapter provides an overview of current knowledge of how anaerobic bacteria protect themselves against nitrosative stress. Nitric oxide (NO) is the primary source of this stress. Aerobically its removal is an oxidative process, whereas reduction is required anaerobically. Mechanisms required to protect aerobic and anaerobic bacteria are therefore different. Several themes recur in the review. First, how gene expression is regulated often provides clues to the physiological function of the gene products...
2018: Advances in Microbial Physiology
https://www.readbyqxmd.com/read/29778146/performance-and-mechanism-of-cr-vi-removal-by-zero-valent-iron-loaded-onto-expanded-graphite
#3
Congbin Xu, Wenjie Yang, Weijiang Liu, Hongliang Sun, Chunlei Jiao, Ai-Jun Lin
Zero-valent iron (ZVI) was loaded on expanded graphite (EG) to produce a composite material (EG-ZVI) for efficient removal of hexavalent chromium (Cr(VI)). EG and EG-ZVI were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier-transform infrared (FTIR) spectroscopy and Brunauer-Emmett-Teller (BET) analysis. EG-ZVI had a high specific surface area and contained sub-micron sized particles of zero-valent iron. Batch experiments were employed to evaluate the Cr(VI) removal performance...
May 2018: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/29778057/dynamic-study-of-cr-vi-removal-performance-and-mechanism-from-water-using-multilayer-material-coated-nanoscale-zerovalent-iron
#4
Bin Wu, Dinghua Peng, Siyu Hou, Bicong Tang, Can Wang, Heng Xu
In this study, the dynamic Cr(VI) removal process from water by the synthesized multilayer material coated nanoscale zerovalent iron (SBC-nZVI) was systematically discussed at different treatment conditions. The results showed that initial pH, contact time, Cr(VI) concentration and the dosage of SBC-nZVI were important parameters that influenced the Cr(VI) removal efficiency. The major Cr(VI) removal occurred within 60 min and gradually tend to equilibrium with consistent treatment. The removal efficiency was highly depended on pH values and the adsorption kinetics agreed well with the pseduo-second-order model (PSO)...
May 16, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29776549/in-situ-growth-of-iron-based-metal-organic-framework-crystal-on-ordered-mesoporous-carbon-for-efficient-electrocatalysis-of-p-nitrotoluene-and-hydrazine
#5
Shuang Yuan, Xiangjie Bo, Liping Guo
In this paper, H2 N-Fe-MIL-88B@OMC composites were fabricated by the simple hydrothermal method through in-situ growth iron-based metal-organic frameworks (H2 N-Fe-MIL-88B) on ordered mesoporous carbon (OMC). Compared with pure H2 N-Fe-MIL-88B crystals, the introduction of OMC can shrink the size of H2 N-Fe-MIL-88B, increase the specific surface area, decrease the electron transfer resistance and drastically improve the electrochemical performance of H2 N-Fe-MIL-88B@OMC. The composite exhibits remarkable electrocatalytic activity for p-nitrotoluene (p-NT) reduction and hydrazine (N2 H4 ) oxidation...
September 18, 2018: Analytica Chimica Acta
https://www.readbyqxmd.com/read/29775934/arsenic-speciation-dynamics-in-paddy-rice-soil-water-environment-sources-physico-chemical-and-biological-factors-a-review
#6
REVIEW
Prasanna Kumarathilaka, Saman Seneweera, Andrew Meharg, Jochen Bundschuh
Rice is the main staple carbohydrate source for billions of people worldwide. Natural geogenic and anthropogenic sources has led to high arsenic (As) concentrations in rice grains. This is because As is highly bioavailable to rice roots under conditions in which rice is cultivated. A multifaceted and interdisciplinary understanding, both of short-term and long-term effects, are required to identify spatial and temporal changes in As contamination levels in paddy soil-water systems. During flooding, soil pore waters are elevated in inorganic As compared to dryland cultivation systems, as anaerobism results in poorly mobile As(V), being reduced to highly mobile As(III)...
April 21, 2018: Water Research
https://www.readbyqxmd.com/read/29775745/analysis-of-neurotrophic-and-antioxidant-factors-related-to-midbrain-dopamine-neuronal-loss-and-brain-inflammation-in-the-cerebrospinal-fluid-of-the-elderly
#7
Angel Martin-de-Pablos, Antonio Córdoba-Fernández, Emilio Fernández-Espejo
Midbrain dopamine neuronal loss and neuroinflammation are two phenomena that are associated with brain senescence. Neurotrophic factor changes and oxidative stress could subserve these phenomena. Aging-related brain changes can be well monitored through the cerebrospinal fluid (CSF). The objective was to analyze neurotrophic and oxidative parameters that could be related to midbrain dopamine neuronal loss or brain inflammation in the CSF of elderly subjects: 1) levels of the dopaminotrophic factors BDNF, GDNF, persephin, and neurturin, 2) levels of the proinflammatory factors TGFβ1 and TGFβ2 ; 3) activity of main antioxidant enzymes (catalases, glutathione-peroxidase, glutathione-reductase, glutathione-S-transferases, peroxirredoxins, and superoxide-dismutases), 4) ferritin content, antioxidant protein which reduces reactive free iron, and 5) antioxidant potential of the cerebrospinal fluid...
May 15, 2018: Experimental Gerontology
https://www.readbyqxmd.com/read/29774236/endocytosis-mediated-siderophore-uptake-as-a-strategy-for-fe-acquisition-in-diatoms
#8
Elena Kazamia, Robert Sutak, Javier Paz-Yepes, Richard G Dorrell, Fabio Rocha Jimenez Vieira, Jan Mach, Joe Morrissey, Sébastien Leon, France Lam, Eric Pelletier, Jean-Michel Camadro, Chris Bowler, Emmanuel Lesuisse
Phytoplankton growth is limited in vast oceanic regions by the low bioavailability of iron. Iron fertilization often results in diatom blooms, yet the physiological underpinnings for how diatoms survive in chronically iron-limited waters and outcompete other phytoplankton when iron becomes available are unresolved. We show that some diatoms can use siderophore-bound iron, and exhibit a species-specific recognition for siderophore types. In Phaeodactylum tricornutum , hydroxamate siderophores are taken up without previous reduction by a high-affinity mechanism that involves binding to the cell surface followed by endocytosis-mediated uptake and delivery to the chloroplast...
May 2018: Science Advances
https://www.readbyqxmd.com/read/29773261/perioperative-transfusion-management-in-gastric-cancer-surgery-analysis-of-the-spanish-subset-of-the-eurecca-oesophago-gastric-cancer-registry
#9
Javier Osorio, Carlos Jericó, Coro Miranda, Elisenda Garsot, Alexis Luna, Mónica Miró, Maite Santamaría, Eva Artigau, Joaquín Rodríguez-Santiago, Sandra Castro, Josep Feliu, Aurora Aldeano, Carles Olona, Dulce Momblan, David Ruiz, Gonzalo Galofré, Inmaculada Pros, Xabier García-Albéniz, Miguel Lozano, Manuel Pera
INTRODUCTION: This study evaluated allogenic packed red blood cell (aPRBC) transfusion rates in patients undergoing resection for gastric cancer and the implementation of blood-saving protocols (BSP). METHODS: Retrospective study of all gastric cancer patients operated on with curative intent in Catalonia and Navarra (2011-2013) and included in the Spanish subset of the EURECCA Oesophago-Gastric Cancer Registry. Hospitals with BSP were defined as those with a preoperative haemoglobin (Hb) optimisation circuit associated with restrictive transfusion strategies...
May 14, 2018: Cirugía Española
https://www.readbyqxmd.com/read/29773189/effects-of-furosemide-administration-on-the-concentration-of-essential-and-toxic-elements-in-wistar-rats-by-inductively-coupled-plasma-optical-emission-spectrometry
#10
Luiz Raimundo Seneterri Silva Rodrigues Dos Santos, Aníbal de Freitas Santos, Maria das Graças Andrade Korn
Furosemide can interfere with the metabolism of chemical elements, changing their levels in several tissues, thus causing imbalance. In this study, inductively coupled plasma optical emission spectrometry (ICP OES) was used for multi-element analysis (Cd, Cu, Fe, Mg, Pb, Se and Zn) after microwave-assisted digestion, to evaluate the effect of furosemide (loop diuretic) on the composition of these essential and toxic elements in biological samples (liver, kidney, heart, lung and serum) of Wistar rats. Male and female Wistar rats (n = 40, 180-350 g) were randomly divided into 2 groups (n = 20/group)...
July 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29772424/enhanced-hexavalent-chromium-removal-performance-and-stabilization-by-magnetic-iron-nanoparticles-assisted-biochar-in-aqueous-solution-mechanisms-and-application-potential
#11
Shishu Zhu, Xiaochen Huang, Dawei Wang, Li Wang, Fang Ma
The superiority of the nanoscale zero valent iron (nZVI) assisted biochar (BC) composites compared to traditional nZVI and its application feasibility are still unclear. This study aimed to provide valuable information for practical application. Firstly, the Fe/BC mass ratio of 2:1 during the preparation of nZVI-BC was proved obtaining the complete Cr6+ removal. Then, results revealed that the initial pH value tuned Cr6+ removal performance via varying existing Cr6+ species, surface charge, and chemical states of iron nanoparticles (NPs)...
May 9, 2018: Chemosphere
https://www.readbyqxmd.com/read/29771935/cell-iron-status-influences-macrophage-polarization
#12
Rafiou Agoro, Meriem Taleb, Valerie F J Quesniaux, Catherine Mura
Macrophages play crucial roles in innate immune response and in the priming of adaptive immunity, and are characterized by their phenotypic heterogeneity and plasticity. Reprogramming intracellular metabolism in response to microenvironmental signals is required for M1/M2 macrophage polarization and function. Here we assessed the influence of iron on the polarization of the immune response in vivo and in vitro. Iron-enriched diet increased M2 marker Arg1 and Ym1 expression in liver and peritoneal macrophages, while iron deficiency decreased Arg1 expression...
2018: PloS One
https://www.readbyqxmd.com/read/29770456/effect-of-elevated-co-2-on-yield-intra-plant-nutrient-dynamics-and-grain-quality-of-rice-cultivars-in-eastern-india
#13
Usha Rani Jena, Dillip Kumar Swain, K K Hazra, Mrinal K Maity
BACKGROUND: Climate models predict an increase in global temperature in response to a doubling of atmospheric [CO2 ] that may impact future rice production and quality. In this study, the effect of elevated [CO2 ] on yield, nutrient acquisition and utilization, and grain quality of rice genotypes was investigated in subtropical climate of eastern India (Kharagpur). Three environments (open field, ambient, and elevated [CO2 ]) were tested using four rice cultivars of eastern India. RESULTS: Under elevated [CO2 ] (25% higher), yield of high yielding cultivars (HYCs) viz...
May 16, 2018: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/29769077/magnetic-field-distribution-modulation-of-intrathecal-delivered-ketorolac-iron-oxide-nanoparticle-conjugates-produce-excellent-analgesia-for-chronic-inflammatory-pain
#14
Ping-Ching Wu, Dar-Bin Shieh, Hung-Tsung Hsiao, Jeffery Chi-Fei Wang, Ya-Chi Lin, Yen-Chin Liu
BACKGROUND: Nanoparticles have become one of the most promising among the potential materials used for biomedical applications. However, few researchers have focused on their effects on analgesia. Despite the fact that various nanoparticles have been evaluated for drug delivery and MRI imaging contrast enhancement in clinical settings, no reports have investigated the in vivo synergy of ketorolac iron-oxide nanoparticle conjugates to improve the analgesic effect. METHODS: Ketorolac conjugated magnetic iron oxide nanoparticles (Keto-SPIO) were synthesized via two-stage additions of protective agents and chemical co-precipitation...
May 16, 2018: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/29769008/biochemical-and-haematological-predictors-of-reduced-neutrophil-granulocyte-count-associated-with-intravenous-ceftriaxone-treatment
#15
Basant Puri, Anne Derham, Jean Monro
Background Intravenous treatment with ceftriaxone, a commonly used third-generation cephalosporin, is associated with a risk of the potentially fatal side-effect of neutropenia. Objective The first systematic study to determine whether six to 12 days' intravenous ceftriaxone treatment is associated with a reduction in the neutrophil count and the extent to which biochemical and/or haematological parameters routinely measured at baseline predict such a fall. Method Baseline and follow-up haematological and biochemical blood indices were measured in 86 patients (mean age 39...
May 16, 2018: Reviews on Recent Clinical Trials
https://www.readbyqxmd.com/read/29768681/alkyl-radical-generation-by-an-intramolecular-homolytic-substitution-reaction-between-iron-ii-and-trialkylsulfonium-groups
#16
Stefan Jungen, Peter Chen
Intramolecular, homolytic substitution reactions between iron (II) species and various trialkylsulfonium groups were directly observed in the gas phase upon collision induced dissociation. In spite of the notoriously low reduction potential of trialkylsulfonium species and the mismatched oxidation potential of iron (II), the reactions proceed at moderate collision energies, forming an alkyl radical as well as a thioether coordinated to the iron. In contrast to classical homolytic substitutions, the attacking radical is a "metalloradical", namely iron (II) that is oxidized to iron (III) during the reaction...
May 16, 2018: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29768338/botulinum-toxin-injection-to-improve-functional-independence-and-to-alleviate-parenting-stress-in-a-child-with-advanced-pantothenate-kinase-associated-neurodegeneration-a-case-report-and-literature-review
#17
Cho-I Lin, Kuan-Lin Chen, Ta-Shen Kuan, Sheng-Han Lin, Wei-Pin Lin, Yu-Ching Lin
RATIONALE: Pantothenate kinase-associated neurodegeneration (PKAN) is a rare autosomal recessive disease. Progressive motor symptoms such as dystonia and spasticity begin in childhood and relentlessly become incapacitating later in life. Treatments including anticholinergics and iron chelation are usually ineffective. Botulinum toxin type A (BoNT-A) is effective for adult patients with dystonia or spasticity. PATIENT CONCERNS: We reported a 10-year-old female patient with advanced PKAN, manifesting as generalized dystonia and spasticity...
May 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29767343/effect-of-artificial-redox-mediators-on-the-photoinduced-oxygen-reduction-by-photosystem-i-complexes
#18
Anastasia Petrova, Mahir Mamedov, Boris Ivanov, Alexey Semenov, Marina Kozuleva
The peculiarities of interaction of cyanobacterial photosystem I with redox mediators 2,6-dichlorophenolindophenol (DCPIP) and N,N,N',N'-tetramethyl-p-phenylenediamine (TMPD) were investigated. The higher donor efficiency of the reduced DCPIP form was demonstrated. The oxidized form of DCPIP was shown to be an efficient electron acceptor for terminal iron-sulfur cluster of photosystem I. Likewise methyl viologen, after one-electron reduction, DCPIP transfers an electron to the molecular oxygen. These results were discussed in terms of influence of these interactions on photosystem I reactions with the molecular oxygen and natural electron acceptors...
May 16, 2018: Photosynthesis Research
https://www.readbyqxmd.com/read/29765092/pilot-scale-study-on-catalytic-ozonation-of-bio-treated-dyeing-and-finishing-wastewater-using-recycled-waste-iron-shavings-as-a-catalyst
#19
Jieting Ma, Yunlu Chen, Jianxin Nie, Luming Ma, Yuanxing Huang, Liang Li, Yan Liu, Zhigang Guo
A pilot scale reactor with an effective volume of 2.93 m3 was built in-situ and run in both batch and continuous modes to investigate the removal for organic pollutants in bio-treated dyeing and finishing wastewater by heterogeneous catalytic ozonation under neutral pH with waste iron shavings as a catalyst. Experimental results showed that both running modes were able to reduce the chemical oxygen demand (COD) from 132-148 mg/L to a level below the discharge criteria (<80 mg/L) within 15-30 mins under several conditions...
May 15, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29763878/ca-containing-amendments-to-reduce-the-absorption-and-translocation-of-pb-in-rice-plants
#20
Jingxia Guo, Yunyun Li, Cong Hu, Shi Zhou, Hao Xu, Qijia Zhang, Guo Wang
The influence of three Ca-containing amendments (dolomite, slaked lime, and limestone) on soil water soluble Pb (Pb-w) levels, Pb accumulation by two rice plants (TJ-8, japonica and II-3301, indica), and the factors affecting Pb-w were investigated. Pot experiment was performed under waterlogged conditions using Pb-contaminated soil collected from an agricultural field near a mine. It was found that the soil amendments significantly reduced Pb content in the rice plants in the order dolomite > slaked lime > limestone, irrespective of rice cultivar...
May 12, 2018: Science of the Total Environment
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