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https://www.readbyqxmd.com/read/28655216/phenotypic-and-genomic-survey-on-organic-acid-utilization-profile-of-pseudomonas-mendocina-strain-s5-2-a-vineyard-soil-isolate
#1
Teik Min Chong, Jian-Woon Chen, Wah-Seng See-Too, Choo-Yee Yu, Geik-Yong Ang, Yan Lue Lim, Wai-Fong Yin, Catherine Grandclément, Denis Faure, Yves Dessaux, Kok-Gan Chan
Root exudates are chemical compounds that are released from living plant roots and provide significant energy, carbon, nitrogen and phosphorus sources for microbes inhabiting the rhizosphere. The exudates shape the microflora associated with the plant, as well as influences the plant health and productivity. Therefore, a better understanding of the trophic link that is established between the plant and the associated bacteria is necessary. In this study, a comprehensive survey on the utilization of grapevine and rootstock related organic acids were conducted on a vineyard soil isolate which is Pseudomonas mendocina strain S5...
December 2017: AMB Express
https://www.readbyqxmd.com/read/28654286/unusual-c-n-coupling-reactivity-of-thiopyridazines-efficient-synthesis-of-iron-diorganotrisulfide-complexes
#2
Michael Tüchler, Stefan Holler, Jörg A Schachner, Ferdinand Belaj, Nadia C Mösch-Zanetti
The reaction of iron(II) triflate with 6-tert-butyl-3-thiopyridazine (PnH) and 4-methyl-6-tert-butyl-3-thiopyridazine ((Me)PnH) respectively led to iron bis(diorganotrisulfide) complexes [Fe((R)PnS3Pn(R))2](OTf)2 [R = H (1a) and Me (2a)]. The corresponding perchlorate complexes were prepared by using the iron(II) chloride precursor and the subsequent addition of 2 equiv of NaClO4, giving [Fe((R)PnS3Pn(R))2](ClO4)2 [R = H (1b) and Me (2b)]. The compounds were fully characterized including single-crystal X-ray diffraction analysis...
June 27, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28649601/excessive-early-life-dietary-exposure-a-potential-source-of-elevated-brain-iron-and-a-risk-factor-for-parkinson-s-disease
#3
Dominic J Hare, Bárbara Rita Cardoso, Erika P Raven, Kay L Double, David I Finkelstein, Ewa A Szymlek-Gay, Beverley-Ann Biggs
Iron accumulates gradually in the ageing brain. In Parkinson's disease, iron deposition within the substantia nigra is further increased, contributing to a heightened pro-oxidant environment in dopaminergic neurons. We hypothesise that individuals in high-income countries, where cereals and infant formulae have historically been fortified with iron, experience increased early-life iron exposure that predisposes them to age-related iron accumulation in the brain. Combined with genetic factors that limit iron regulatory capacity and/or dopamine metabolism, this may increase the risk of Parkinson's diseases...
2017: NPJ Parkinson's Disease
https://www.readbyqxmd.com/read/28647263/a-zero-valent-iron-and-organic-matter-mixture-enhances-herbicide-and-herbicide-degradation-product-removal-in-subsurface-waters
#4
Kaisa Kerminen, Ville Salovaara, Merja Hannele Kontro
The pesticide atrazine, its degradation products, and 2,6-dichlorobenzamide (BAM) are persistent in groundwater environment. We studied whether their dissipation can be enhanced with a mixture of a complex carbon source and zero-valent iron (ZVI) called EHC®. The application rates were 1.0% and 2.0% (by weight) in subsurface sediments slurries (atrazine 30mg/L), and 2.0% in 1.5m pilot-scale sediment columns with groundwater flowing through (atrazine 0.08, desethylatrazine DEA 0.03, BAM 0.02μg/L). In the slurries under aerobic conditions, atrazine of 0...
July 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28644630/expanding-the-therapeutic-potential-of-the-iron-chelator-deferasirox-in-the-development-of-aqueous-stable-ti-iv-anticancer-complexes
#5
Sergio A Loza-Rosas, Alexandra M Vázquez-Salgado, Kennett I Rivero, Lenny J Negrón, Yamixa Delgado, Josué A Benjamín-Rivera, Angel L Vázquez-Maldonado, Timothy B Parks, Charlene Munet-Colón, Arthur D Tinoco
The recent X-ray structure of titanium(IV)-bound human serum transferrin (STf) exhibiting citrate as a synergistic anion reveals a difference in Ti(IV) coordination versus iron(III), the metal endogenously delivered by the protein to cells. This finding enriches our bioinspired drug design strategy for Ti(IV)-based anticancer therapeutics, which applies a family of Fe(III) chelators termed chemical transferrin mimetic (cTfm) ligands to inhibit Fe bioavailability in cancer cells. Deferasirox, a drug used for iron overload disease, is a cTfm ligand that models STf coordination to Fe(III), favoring Fe(III) binding versus Ti(IV)...
June 23, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28642774/increasing-provasculature-complexity-in-the-arabidopsis-embryo-may-increase-total-iron-content-in-seeds-a-hypothesis
#6
Hannetz Roschzttardtz, Sofía Bustos, Maria F Coronas, Miguel A Ibeas, Susana Grant-Grant, Joaquín Vargas-Pérez
Anemia due to iron deficiency is a worldwide issue, affecting mainly children and women. Seed iron is a major source of this micronutrient for feeding, however, in most crops these levels are too low to meet daily needs. Thus, increasing iron allocation and its storage in seeds can represent an important step to enhance iron provision for humans and animals. Our knowledge on seed iron homeostasis is mainly based on studies performed in the model plant Arabidopsis thaliana, where iron accumulates in endodermis cells surrounding the embryo provasculature...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28642757/the-fungal-pathogen-candida-glabrata-does-not-depend-on-surface-ferric-reductases-for-iron-acquisition
#7
Franziska Gerwien, Abu Safyan, Stephanie Wisgott, Sascha Brunke, Lydia Kasper, Bernhard Hube
Iron acquisition is a crucial virulence determinant for many bacteria and fungi, including the opportunistic fungal pathogens Candida albicans and C. glabrata. While the diverse strategies used by C. albicans for obtaining iron from the host are well-described, much less is known about the acquisition of this micronutrient from host sources by C. glabrata - a distant relative of C. albicans with closer evolutionary ties to Saccharomyces cerevisiae, which nonetheless causes severe clinical symptoms in humans...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28642302/residual-erythropoiesis-protects-against-myocardial-hemosiderosis-in-transfusion-dependent-thalassemia-by-lowering-labile-plasma-iron-via-transient-generation-of-apotransferrin
#8
Maciej W Garbowski, Patricia Evans, Evangelia Vlachodimitropoulou, Robert Hider, John B Porter
Cardiosiderosis is a leading cause of mortality in transfusion-dependent thalassemias. Plasma non-transferrin-bound iron and its redox-active component, labile plasma iron, are key sources of iron loading in cardiosiderosis. Risk factors were identified in 73 patients with or without cardiosiderosis. Soluble transferrin receptor-1 levels were significantly lower in patients with cardiosiderosis (odds ratio 21). This risk increased when transfusion-iron loading rates exceeded the erythroid transferrin uptake rate (derived from soluble transferrin receptor-1) by >0...
June 22, 2017: Haematologica
https://www.readbyqxmd.com/read/28636185/decarboxylative-alkynylation
#9
Joel M Smith, Tian Qin, Rohan R Merchant, Jacob T Edwards, Lara R Malins, Zhiqing Liu, Guanda Che, Zichao Shen, Scott A Shaw, Martin D Eastgate, Phil S Baran
The development of a new decarboxylative cross-coupling protocol that affords terminal and substituted alkynes from various carboxylic acids is described using both nickel- and iron-based catalysts. The use of N-hydroxytetrachlorophthalimide (TCNHPI) esters is crucial to the success of the transformation, and the reaction is amenable to in situ carboxylic acid activation. Additionally, an inexpensive, commercially-available alkyne source is employed in this formal homologation process that serves as a surrogate for other well-established alkyne syntheses...
June 21, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28633523/the-effect-of-pseudomonas-fluorescens-on-buried-steel-pipeline-corrosion
#10
Amy J Spark, Ivan S Cole, Adam S Best, David W Law, Liam P Ward
Buried steel infrastructure can be a source of iron ions for bacterial species, leading to microbiologically influence corrosion (MIC). Localised corrosion of pipelines due to MIC is one of the key failure mechanisms of buried steel pipelines. In order to better understand the mechanisms of localised corrosion in soil, semi-solid agar has been developed as an analogue for soil. Here, Pseudomonas fluorescens has been introduced to the system to understand how bacteria interact with steel. Through electrochemical testing including open circuit potentials, potentiodynamic scans, anodic potential holds and electrochemical impedance spectroscopy it has been shown that P...
June 21, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28630614/a-plant-based-diet-for-the-prevention-and-treatment-of-type-2-diabetes
#11
REVIEW
Michelle McMacken, Sapana Shah
The prevalence of type 2 diabetes is rising worldwide, especially in older adults. Diet and lifestyle, particularly plant-based diets, are effective tools for type 2 diabetes prevention and management. Plant-based diets are eating patterns that emphasize legumes, whole grains, vegetables, fruits, nuts, and seeds and discourage most or all animal products. Cohort studies strongly support the role of plant-based diets, and food and nutrient components of plant-based diets, in reducing the risk of type 2 diabetes...
May 2017: Journal of Geriatric Cardiology: JGC
https://www.readbyqxmd.com/read/28626279/nutritional-status-of-foster-children-in-the-u-s-implications-for-cognitive-and-behavioral-development
#12
Ursula A Tooley, Zeina Makhoul, Philip A Fisher
OBJECTIVE: Children in foster care are at greater risk for poor health, physical, cognitive, behavioral, and developmental outcomes than are children in the general population. Considerable research links early nutrition to later cognitive and behavioral outcomes. The aim of this narrative review is to examine the prevalence of poor nutrition and its relation to subsequent health and development in foster children. METHOD: Relevant studies for inclusion were identified from numerous sources (e...
November 2016: Children and Youth Services Review
https://www.readbyqxmd.com/read/28625994/a-small-protein-hemp-is-a-transcriptional-activator-for-hemin-uptake-operon-in-burkholderia-multivorans-atcc-17616
#13
Takuya Sato, Shouta Nonoyama, Akane Kimura, Yuji Nagata, Yoshiyuki Ohtsubo, Masataka Tsuda
Iron and heme play very important roles in various metabolic functions in bacteria, and their intracellular homeostasis is maintained because high concentrations of free forms of these molecules greatly facilitate the Fenton reaction-mediated production of large amounts of reactive oxygen species that severely damage various biomolecules. Ferric uptake regulator (Fur) from Burkholderiamultivorans ATCC 17616 is an iron-responsive global transcriptional regulator, and its fur deletant exhibits pleiotropic phenotypes...
June 16, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28625045/size-dependent-heating-of-magnetic-iron-oxide-nanoparticles
#14
Sheng Tong, Christopher A Quinto, Linlin Zhang, Priya Mohindra, Gang Bao
The ability to generate heat under an alternating magnetic field (AMF) makes magnetic iron oxide nanoparticles (MIONs) an ideal heat source for biomedical applications including cancer thermoablative therapy, tissue preservation, and remote control of cell function. However, there is a lack of quantitative understanding of the mechanisms governing heat generation of MIONs, and the optimal nanoparticle size for magnetic fluid heating (MFH) applications. Here, we show that MIONs with large sizes (>20 nm) have a specific absorption rate (SAR) significantly higher than that predicted by the widely used linear theory of MFH...
June 21, 2017: ACS Nano
https://www.readbyqxmd.com/read/28618665/metal-accumulation-in-soils-derived-from-volcano-sedimentary-rocks-rio-itapicuru-greenstone-belt-northeastern-brazil
#15
Laíse Milena Ribeiro Dos Santos, Thomas Vincent Gloaguen, Francisco de Souza Fadigas, Joselisa Maria Chaves, Tamires Moraes Oliveira Martins
Many countries and some Brazilian regions have defined the guideline values for metals in soils. However, the local geological features may be so heterogeneous that global or even regional guideline values cannot be applied. The Greenstone Belts are worldwide geological formations of vast extension, containing mineralization of various metals (e.g., Au, Cr, Ni, and Ag). Natural concentrations of soils must be known to correctly assess the impact of mining. We studied the soils of the Rio Itapicuru Greenstone Belt (RIGB), of Paleoproterozoic age, sampling at 24 sites (0-0...
June 11, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28618115/iron-sulfur-glutaredoxin-2-protects-oligodendrocytes-against-damage-induced-by-nitric-oxide-release-from-activated-microglia
#16
Klaudia Lepka, Katrin Volbracht, Eckhard Bill, Reiner Schneider, Natalia Rios, Thomas Hildebrandt, Jens Ingwersen, Timur Prozorovski, Christopher Horst Lillig, Jack van Horssen, Lawrence Steinman, Hans-Peter Hartung, Rafael Radi, Arne Holmgren, Orhan Aktas, Carsten Berndt
Demyelinated brain lesions, a hallmark of autoimmune neuroinflammatory diseases like multiple sclerosis, result from oligodendroglial cell damage. Activated microglia are considered a major source of nitric oxide and subsequent peroxynitrite-mediated damage of myelin. Here, we provide biochemical and biophysical evidence that the oxidoreductase glutaredoxin 2 inhibits peroxynitrite formation by transforming nitric oxide into dinitrosyl-diglutathionyl-iron-complexes. Glutaredoxin 2 levels influence both survival rates of primary oligodendrocyte progenitor cells and preservation of myelin structure in cerebellar organotypic slice cultures challenged with activated microglia or nitric oxide donors...
June 15, 2017: Glia
https://www.readbyqxmd.com/read/28615265/adequacy-of-nutritional-intake-from-food-and-supplements-in-a-cohort-of-pregnant-women-in-qu%C3%A3-bec-canada-the-3d-cohort-study-design-develop-discover
#17
Lise Dubois, Maikol Diasparra, Brigitte Bédard, Cynthia K Colapinto, Bénédicte Fontaine-Bisson, Anne-Sophie Morisset, Richard E Tremblay, William D Fraser
Background: Assessments of the dietary intakes in various populations suggest that pregnant women have difficulty meeting all their nutritional requirements through diet alone. Few large-scale studies have considered both food sources and supplements in assessing the adequacy of nutritional intakes during pregnancy.Objectives: Our study aimed to assess nutritional intakes during pregnancy by examining dietary sources and supplements. It then compared these findings with Dietary Reference Intakes.Design: We conducted a nutrition study in a large pregnancy cohort using a 3-d food record during the second trimester of pregnancy...
June 14, 2017: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28613853/production-of-hydrogen-peroxide-in-groundwater-at-rifle-colorado
#18
Xiu Yuan, Peter S Nico, Xiang Huang, Tongxu Liu, Craig Ulrich, Kenneth H Williams, James A Davis
The commonly held assumption that photo-dependent processes dominate H2O2 production in natural waters has been recently questioned. Here, we present evidence for the unrecognized and light-independent generation of H2O2 in groundwater of an alluvial aquifer adjacent to the Colorado River near Rifle, CO. In situ detection using a sensitive chemiluminescent method suggests H2O2 concentrations ranging from lower than the detection limit (< 1 nM) to 54 nM along the vertical profiles obtained at various locations across the aquifer...
June 14, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28612312/chemical-and-microbial-characteristics-of-municipal-drinking-water-supply-systems-in-the-canadian-arctic
#19
Kiley Daley, Lisbeth Truelstrup Hansen, Rob C Jamieson, Jenny L Hayward, Greg S Piorkowski, Wendy Krkosek, Graham A Gagnon, Heather Castleden, Kristen MacNeil, Joanna Poltarowicz, Emmalina Corriveau, Amy Jackson, Justine Lywood, Yannan Huang
Drinking water in the vast Arctic Canadian territory of Nunavut is sourced from surface water lakes or rivers and transferred to man-made or natural reservoirs. The raw water is at a minimum treated by chlorination and distributed to customers either by trucks delivering to a water storage tank inside buildings or through a piped distribution system. The objective of this study was to characterize the chemical and microbial drinking water quality from source to tap in three hamlets (Coral Harbour, Pond Inlet and Pangnirtung-each has a population of <2000) on trucked service, and in Iqaluit (population ~6700), which uses a combination of trucked and piped water conveyance...
June 13, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28609301/a-light-weight-compact-proton-gantry-design-with-a-novel-dose-delivery-system-for-broad-energetic-laser-accelerated-beams
#20
U Masood, T E Cowan, W Enghardt, K M Hofmann, L Karsch, F Kroll, U Schramm, J J Wilkens, J Pawelke
Proton beams may provide superior dose-conformity in radiation therapy. However, the large sizes and costs limit the widespread use of proton therapy (PT). The recent progress in proton acceleration via high-power laser systems has made it a compelling alternative to conventional accelerators, as it could potentially reduce the overall size and cost of the PT facilities. However, the laser-accelerated beams exhibit different characteristics than conventionally accelerated beams, i.e. very intense proton bunches with large divergences and broad-energy spectra...
July 7, 2017: Physics in Medicine and Biology
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