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https://www.readbyqxmd.com/read/29144309/combined-electrocoagulation-and-electro-oxidation-of-industrial-textile-wastewater-treatment-in-a-continuous-multi-stage-reactor
#1
Edison GilPavas, Paula Arbeláez-Castaño, José Medina, Diego A Acosta
A combined electrocoagulation (EC) and electrochemical oxidation (EO) industrial textile wastewater treatment potential is evaluated in this work. A fractional factorial design of experiment showed that EC current density, followed by pH, were the most significant factors. Conductivity and number of electrooxidation cells did not affect chemical oxygen demand degradation (DCOD). Aluminum and iron anodes performed similarly as sacrificial anodes. Current density, pH and conductivity were chosen for a Box-Behnken design of experiment to determine optimal conditions to achieve a high DCOD minimizing operating cost (OC)...
November 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/29136545/removal-of-tetracycline-by-fe-ni-bimetallic-nanoparticles-in-aqueous-solution
#2
Haoran Dong, Zhao Jiang, Cong Zhang, Junmin Deng, Kunjie Hou, Yujun Cheng, Lihua Zhang, Guangming Zeng
This study investigated the degradation of tetracycline (TC) by Fe/Ni bimetallic nanoparticles (Fe/Ni BNPs) and nanoscale zero-valent iron (NZVI) in aqueous solution. Results revealed that Fe/Ni BNPs showed much better performance than NZVI. The effects of pH (5, 7 and 9), initial TC concentration and competitive anions (NO3(-), H2PO4(-), SO4(2-) and HCO3(-)) on the removal of TC by Fe/Ni BNPs were investigated. The results indicated that the removal of TC was higher under acidic conditions and the reaction reached equilibrium more quickly at lower initial TC concentrations...
November 8, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29136024/severe-oxidative-stress-in-an-acute-inflammatory-demyelinating-model-in-the-rhesus-monkey
#3
Jordon Dunham, Reinofke van de Vis, Jan Bauer, Jacqueline Wubben, Nikki van Driel, Jon D Laman, Bert A 't Hart, Yolanda S Kap
Oxidative stress is increasingly implicated as a co-factor of tissue injury in inflammatory/demyelinating disorders of the central nervous system (CNS), such as multiple sclerosis (MS). While rodent experimental autoimmune encephalomyelitis (EAE) models diverge from human demyelinating disorders with respect to limited oxidative injury, we observed that in a non-human primate (NHP) model for MS, namely EAE in the common marmoset, key pathological features of the disease were recapitulated, including oxidative tissue injury...
2017: PloS One
https://www.readbyqxmd.com/read/29131568/diisonitrile-natural-product-sf2768-functions-as-a-chalkophore-that-mediates-copper-acquisition-in-streptomyces-thioluteus
#4
Lijuan Wang, Mengyi Zhu, Qingbo Zhang, Xu Zhang, Panlei Yang, Zihui Liu, Yun Deng, Yiguang Zhu, Xueshi Huang, Li Han, Shengqing Li, Jing He
A non-ribosomal peptide synthetase (NRPS) gene cluster (sfa) was identified in Streptomyces thioluteus to direct the biosynthesis of the diisonitrile antibiotic SF2768. Its biosynthetic pathway was reasonably proposed based on bioinformatics analysis, metabolic profiles of mutants and the elucidation of the intermediate and shunt product structures. Bioinformatics-based alignment found a putative ATP-binding cassette (ABC) transporter related to iron import within the biosynthetic gene cluster, which implied that the product might be a siderophore...
November 13, 2017: ACS Chemical Biology
https://www.readbyqxmd.com/read/29120170/cationic-ti-complexes-with-three-n-o-type-tetrazolyl-ligands-ti%C3%A2-fe-transmetalation-within-fe-metallascorpionate-complexes
#5
Yu Jin Park, Ji Yeon Ryu, Sam Hwang, Ka Hyun Park, Ji Min Lee, Sung Cho, Sunwoo Lee, Manik Lal Saha, Peter J Stang, Junseong Lee
Herein, we report the synthesis of two novel ionic Ti complexes possessing three [N,O]-type bidentate ligands from the reaction of Fe metallascorpionate ligands possessing extended alcohol groups and TiCl4. The reaction of substituted hydroxyphenyl tetrazole and Fe(ClO4)3 in a molar ratio of 3:1 afforded iron scorpionate metalloligands possessing extended arms, which were characterized by IR spectroscopy and ESI-TOF-MS spectrometry. Their molecular structures were also confirmed as neutral Fe-centered scorpionate complexes by X-ray crystallography, in which the extended alcohol groups adopted a tripodal geometry...
November 9, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/29113455/hdac1-governs-iron-homeostasis-independent-of-histone-deacetylation-in-iron-overload-murine-models
#6
Xiangju Yin, Qian Wu, Jitender Monga, Enjun Xie, Hao Wang, Shufen Wang, Huizhen Zhang, Zhan-You Wang, Tianhua Zhou, Yunjun Shi, Jack Rogers, Hening Lin, Junxia Min, Fudi Wang
AIMS: Iron overload disorders are common and could lead to significant morbidity and mortality worldwide. Due to limited treatment options, there is a great need to develop novel strategies to remove the excess body iron. To discover potential epigenetic modulator in hepcidin upregulation and subsequently decreasing iron burden, we performed an epigenetic screen. The in vivo effects of the identified compounds were further tested in iron-overload mouse models, including Hfe-/-, Hjv-/- and hepatocyte-specific Smad4 knockout (Smad4fl/fl;Alb-Cre+) mice...
November 7, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/29112416/redox-conditions-affect-doc-quality-in-stratified-freshwaters
#7
Tallent Dadi, Mourad Harir, Norbert Hertkorn, Matthias Koschorreck, Philippe Schmitt-Kopplin, Peter Herzsprung
The quality of dissolved organic carbon (DOC) affects both carbon cycling in surface waters as well as drinking water production. Not much is known about the influence of environmental conditions on DOC quality. We studied the effect of redox conditions on the chemical composition of DOC in a drinking water reservoir by Fourier transform ion cyclotron resonance mass spectrometry (FTICR-MS) in combination with sediment core incubation experiments under manipulated redox conditions. We observed clear differences in DOC quality between oxic epilimnion, anoxic hypolimnion and sediment pore-water...
November 7, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29109370/olive-olea-europaea-l-biophenols-a-nutriceutical-against-oxidative-stress-in-sh-sy5y-cells
#8
Syed Haris Omar, Philip G Kerr, Christopher J Scott, Adam S Hamlin, Hassan K Obied
Plant biophenols have been shown to be effective in the modulation of Alzheimer's disease (AD) pathology resulting from free radical-induced oxidative stress and imbalance of the redox chemistry of transition metal ions (e.g., iron and copper). On the basis of earlier reported pharmacological activities, olive biophenols would also be expected to have anti-Alzheimer's activity. In the present study, the antioxidant activity of individual olive biophenols (viz. caffeic acid, hydroxytyrosol, oleuropein, verbascoside, quercetin, rutin and luteolin) were evaluated using superoxide radical scavenging activity (SOR), hydrogen peroxide (H₂O₂) scavenging activity, and ferric reducing ability of plasma (FRAP) assays...
October 29, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29104369/an-efficient-catalytic-degradation-of-trichloroethene-in-a-percarbonate-system-catalyzed-by-ultra-fine-heterogeneous-zeolite-supported-zero-valent-iron-nickel-bimetallic-composite
#9
Muhammad Danish, Xiaogang Gu, Shuguang Lu, Mark L Brusseau, Ayyaz Ahmad, Muhammad Naqvi, Usman Farooq, Waqas Qamar Zaman, Xiaori Fu, Zhouwei Miao
Zeolite supported nano iron-nickel bimetallic composite (Z-nZVI-Ni) was prepared using a liquid-phase reduction process. The corresponding surface morphologies and physico-chemical properties of the Z-nZVI-Ni composite were determined using scanning electron microscopy (SEM), transmission electron microscopy (TEM), Energy dispersive X-ray spectra (EDS), Brunauer Emmett Teller (BET) adsorption, wide angle X-ray diffractometry (WA-XRD), and Fourier transform infrared spectroscopy (FTIR). The results indicated high dispersion of iron and nickel nano particles on the zeolite sheet with an enhanced surface area...
February 5, 2017: Applied Catalysis. A, General
https://www.readbyqxmd.com/read/29103327/in-vivo-mr-imaging-of-folate-receptor-expression-with-the-folate-specific-nanospheres-in-a-c6-glioblastoma-model
#10
Yanli An, Qiusha Tang, Rui Yang, Dongfang Liu, Dongsheng Zhang
PURPOSE: To assess the ability of magnetic albumin nanospheres conjugated with folate (FA-MAN) to provide FR-specific enhancement of C6 glioblastoma on magnetic resonance (MR) images. PROCEDURES: Active targeting effect of magnetic albumin nanospheres conjugated with folate (FA-MAN) was evaluated based on MR images and histopathological analysis. MR imaging of subcutaneously transplanted C6 glioblastomas was performed after intravenous injection of FA-MAN, non-targeted (magnetic albumin nanospheres, MAN) and FA-inhibited (magnetic albumin nanospheres conjugated with folate plus folate, FA-MAN + FA) agents at designated time points...
November 5, 2017: Computer Assisted Surgery (Abingdon, England)
https://www.readbyqxmd.com/read/29100127/improving-sensitivity-of-magnetic-resonance-imaging-by-using-a-dual-targeted-magnetic-iron-oxide-nanoprobe
#11
Ling Chen, Jun Xie, Haoan Wu, Fengchao Zang, Ming Ma, Zichun Hua, Ning Gu, Yu Zhang
Developing an ultrasensitive and high-efficient molecular imaging probe for detection of malignant tumors is extremely needed in clinical and remains a big challenge. Here, we report a novel bispecific nanoprobe for dual-targeted T2-weighed magnetic resonance imaging (MRI) of COLO-205 colorectal cancer in vivo. First, the magnetic iron oxide nanoparticles (Fe3O4@OA) were synthesized by a thermal decomposition method. Then, PEGylation of the hydrophobic Fe3O4@OA was implemented by amphiphilic DSPE-PEG2000-COOH, producing water-soluble nanoparticles (Fe3O4@PEG)...
October 24, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29097315/mapping-of-thalamic-magnetic-susceptibility-in-multiple-sclerosis-indicates-decreasing-iron-with-disease-duration-a-proposed-mechanistic-relationship-between-inflammation-and-oligodendrocyte-vitality
#12
Ferdinand Schweser, Ana Luiza Raffaini Duarte Martins, Jesper Hagemeier, Fuchun Lin, Jannis Hanspach, Bianca Weinstock-Guttman, Simon Hametner, Niels P Bergsland, Michael G Dwyer, Robert Zivadinov
Recent advances in susceptibility MRI have dramatically improved the visualization of deep gray matter brain regions and the quantification of their magnetic properties in vivo, providing a novel tool to study the poorly understood iron homeostasis in the human brain. In this study, we used an advanced combination of the recent quantitative susceptibility mapping technique with dedicated analysis methods to study intra-thalamic tissue alterations in patients with clinically isolated syndrome (CIS) and multiple sclerosis (MS)...
October 30, 2017: NeuroImage
https://www.readbyqxmd.com/read/29097312/insights-on-the-conformational-dynamics-of-human-frataxin-through-modifications-of-loop-1
#13
Martín E Noguera, Martín Aran, Clara Smal, Diego S Vazquez, María Georgina Herrera, Ernesto A Roman, Nadine Alaimo, Mariana Gallo, Javier Santos
Human frataxin (FXN) is a highly conserved mitochondrial protein involved in iron homeostasis and activation of the iron-sulfur cluster assembly. FXN deficiency causes the neurodegenerative disease Friedreich's Ataxia. Here, we investigated the effect of alterations in loop-1, a stretch presumably essential for FXN function, on the conformational stability and dynamics of the native state. We generated four loop-1 variants, carrying substitutions, insertions and deletions. All of them were stable and well-folded proteins...
October 30, 2017: Archives of Biochemistry and Biophysics
https://www.readbyqxmd.com/read/29082707/-determination-and-pharmacokinetics-of-main-components-for-psoralea-corylifolia-myristica-fragrants-drug-pair-by-using-uplc-ms-ms
#14
Jia-Rong Gao, Shuang-Zhi Xu, Yan-Quan Han, Liang-Bing Wei, Hui Jiang, Jun-Mei Song, Xue Xue
To conduct multiple-reaction monitoring(MRM) quantitative analysis with ultra-high performance liquid chromatography coupled with mass spectrometry method(UPLC-MS/MS), determine the concentrations of psoralen, isopsoralen, bakuchiol and dehydrodiisoeugenol in plasma under positive iron mode with chloramghenicol as internal standard, and investigate the pharmacokinetics process of the main components before and after oral administration of drug pair Psoralea corylifolia -Myristica fragrants. Thirty-six SD rats were randomly divided into three group(A, B, C) and received P...
May 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/29070101/-methylation-status-and-mrna-expression-of-dkk-3-and-wif-1-in-acute-myeloid-leukemia-patients
#15
Meng-Meng Xu, Yan-Li Yang, Ying-Hua Geng, Jun Li, Yue Ma, Feng Zhang, Fang-Bing Zhu
OBJECTIVE: To analyze the promoter methylation status, mRNA expression and clinical significance of DKK-3 and WIF-1 genes in patients with acute myeloid leukemia(AML). METHODS: Methylation specific polymerase chain reaction (MS-PCR) mothod was carried out to detect DKK-3 and WIF-1 gene promoter methylation status in bone marrow specimen from 56 patients with AML and 20 patients with iron deficiency anaemia(IDA) as control; then the real-time quantitative reverse transcription polymerase chain reaction (RT-PCR) was used to detect mRNA expression of DKK-3, WIF-1 gene and β -catenin in the above-mentioned specinens, and their relationship with the clinical features and survival time was analyzed...
October 2017: Zhongguo Shi Yan Xue Ye Xue za Zhi
https://www.readbyqxmd.com/read/29064775/uspio-positive-ms-lesions-are-associated-with-greater-tissue-damage-than-gadolinium-positive-only-lesions-during-3-year-follow-up
#16
Anne Kerbrat, Benoit Combès, Olivier Commowick, Adil Maarouf, Elise Bannier, Jean Christophe Ferré, Ayman Tourbah, Jean-Philippe Ranjeva, Christian Barillot, Gilles Edan
BACKGROUND: Identifying in vivo the processes that determine lesion severity in multiple sclerosis (MS) remains a challenge. OBJECTIVES: To describe the dynamics of ultrasmall superparamagnetic iron oxide (USPIO) enhancement in MS lesions and the relationship between USPIO enhancement and microstructural changes over 3 years. METHODS: Lesion development was assessed at baseline, Months 3, 6, and 9, using magnetic resonance imaging (MRI) with gadolinium and USPIO...
October 1, 2017: Multiple Sclerosis: Clinical and Laboratory Research
https://www.readbyqxmd.com/read/29058039/agreement-between-manual-relaxometry-and-semi-automated-scanner-based-multi-echo-dixon-technique-for-measuring-liver-t2-in-a-pediatric-and-young-adult-population
#17
Suraj D Serai, Ethan A Smith, Andrew T Trout, Jonathan R Dillman
BACKGROUND: Commercially available 3D multi-echo Dixon (mDixon) sequences provide parametric maps of liver T2*, obviating manual curve fitting that is often required with conventional gradient recalled echo (GRE)-based multi-echo relaxometry, potentially simplifying clinical work flow. OBJECTIVE: The purpose of our study was to compare T2* values generated by a 3D mDixon sequence to values generated by GRE-based T2* relaxometry with manual curve fitting in a pediatric and young adult population...
October 23, 2017: Pediatric Radiology
https://www.readbyqxmd.com/read/29048381/self-assembly-with-2-6-bis-1-pyridin-4-ylmethyl-1h-1-2-3-triazol-4-yl-pyridine-silver-i-and-iron-ii-complexes
#18
Daniel A W Ross, Dan Preston, James D Crowley
A new "click" ligand, 2,6-bis(1-(pyridin-4-ylmethyl)-1H-1,2,3-triazol-4-yl)pyridine (L) featuring a tridentate 2,6-bis(1,2,3-triazol-4-yl)pyridine (tripy) pocket and two pyridyl (py) units was synthesized in modest yield (42%) using the copper(I) catalyzed azide-alkyne cycloaddition (CuAAC) reaction. The coordination chemistry of the ligand with silver(I) and iron(II) ions was examined using a battery of solution (¹H and DOSY (diffusion ordered spectroscopy) nuclear magnetic resonance (NMR), infrared and absorption spectroscopies, high-resolution electrospray ionization mass spectrometry (HR-ESI-MS)), and solid state (X-ray crystallography, elemental analysis) techniques...
October 19, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29033512/heart-rate-recovery-as-a-novel-test-for-predicting-cardiac-involvement-in-beta-thalassemia-major
#19
Selcuk Kucukseymen, Isa Oner Yuksel, Goksel Cagirci, Erkan Koklu, Volkan Karakus, Serkan Cay, Gorkem Kus, Erdal Kurtoglu, Sakir Arslan
BACKGROUND: Abnormal heart rate recovery (HRR) is predictive of cardiac mortality. Autonomic abnormalities in beta-thalassemia major (TM) patients have been reported in previous studies. However, the importance of low HRR in exercise stress test in TM patients has not yet been ascertained. Therefore, this study will be the first of its kind in the literature. METHODS: Exercise stress test was performed on 56 TM patients who were being treated at the Thalassemia Center of our hospital, along with 46 non-TM iron deficiency anemia (IDA) patients as a control group...
July 2017: Acta Cardiologica Sinica
https://www.readbyqxmd.com/read/29032328/effect-of-the-anode-potential-on-the-physiology-and-proteome-of-shewanella-oneidensis-mr-1
#20
Christy Grobbler, Bernardino Virdis, Amanda Nouwens, Falk Harnisch, Korneel Rabaey, Philip L Bond
Shewanella species respire using iron and manganese oxides as well as electrodes as solid terminal electron acceptors. Shewanella oneidenis MR-1 exploits mediated as well as direct extracellular electron transfer (EET) modes to transfer electrons at different formal potentials. These different EET modes at different potentials may utilise alternate electron transfer pathways. Therefore, we investigated how different anode potentials, providing different maximum microbial energy gains impacted S. oneidensis microbial physiology...
October 3, 2017: Bioelectrochemistry
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