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https://www.readbyqxmd.com/read/28546494/draft-genome-sequence-of-acidihalobacter-ferrooxidans-dsm-14175-strain-v8-a-new-iron-and-sulfur-oxidizing-halotolerant-acidophilic-species
#1
Himel N Khaleque, Joshua P Ramsay, Riley J T Murphy, Anna H Kaksonen, Naomi J Boxall, Elizabeth L J Watkin
The use of halotolerant acidophiles for bioleaching provides a biotechnical approach for the extraction of metals from regions where high salinity exists in the ores and source water. Here, we describe the first draft genome of a new species of a halotolerant and iron- and sulfur-oxidizing acidophile, Acidihalobacter ferrooxidans DSM 14175 (strain V8).
May 25, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28542458/a-pilot-study-using-metagenomic-sequencing-of-the-sputum-microbiome-suggests-potential-bacterial-biomarkers-for-lung-cancer
#2
Simon J S Cameron, Keir E Lewis, Sharon A Huws, Matthew J Hegarty, Paul D Lewis, Justin A Pachebat, Luis A J Mur
Lung cancer (LC) is the most prevalent cancer worldwide, and responsible for over 1.3 million deaths each year. Currently, LC has a low five year survival rates relative to other cancers, and thus, novel methods to screen for and diagnose malignancies are necessary to improve patient outcomes. Here, we report on a pilot-sized study to evaluate the potential of the sputum microbiome as a source of non-invasive bacterial biomarkers for lung cancer status and stage. Spontaneous sputum samples were collected from ten patients referred with possible LC, of which four were eventually diagnosed with LC (LC+), and six had no LC after one year (LC-)...
2017: PloS One
https://www.readbyqxmd.com/read/28539653/a-second-mortuary-hiatus-on-lake-baikal-in-siberia-and-the-arrival-of-small-scale-pastoralism
#3
Robert J Losey, Andrea L Waters-Rist, Tatiana Nomokonova, Artur A Kharinskii
The spread of pastoralism in Asia is poorly understood, including how such processes affected northern forager populations. Lake Baikal's western shore has a rich Holocene archaeological record that tracks these processes. The Early Bronze Age here is evidenced by numerous forager burials. The Early Iron Age (EIA) is thought to mark the arrival of pastoralists, but archaeological remains from this period have received little analysis. New radiocarbon dates for EIA human remains from 23 cemeteries indicate that no burials were created along this shore for ~900 years...
May 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28533366/mechanism-of-h2s-mediated-protection-against-oxidative-stress-in-escherichia-coli
#4
Alexander Mironov, Tatyana Seregina, Maxim Nagornykh, Lyly G Luhachack, Natalya Korolkova, Liubov Errais Lopes, Vera Kotova, Gennady Zavilgelsky, Rustem Shakulov, Konstantin Shatalin, Evgeny Nudler
Endogenous hydrogen sulfide (H2S) renders bacteria highly resistant to oxidative stress, but its mechanism remains poorly understood. Here, we report that 3-mercaptopyruvate sulfurtransferase (3MST) is the major source of endogenous H2S in Escherichia coli Cellular resistance to H2O2 strongly depends on the activity of mstA, a gene that encodes 3MST. Deletion of the ferric uptake regulator (Fur) renders ∆mstA cells hypersensitive to H2O2 Conversely, induction of chromosomal mstA from a strong pLtetO-1 promoter (P tet -mstA) renders ∆fur cells fully resistant to H2O2 Furthermore, the endogenous level of H2S is reduced in ∆fur or ∆sodA ∆sodB cells but restored after the addition of an iron chelator dipyridyl...
May 22, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28529518/genetic-variability-genotype-%C3%A3-environment-interaction-correlation-and-gge-biplot-analysis-for-grain-iron-and-zinc-concentration-and-other-agronomic-traits-in-ril-population-of-sorghum-sorghum-bicolor-l-moench
#5
Rahul M Phuke, Kotla Anuradha, Kommineni Radhika, Farzana Jabeen, Ghanta Anuradha, Thatikunta Ramesh, K Hariprasanna, Shivaji P Mehtre, Santosh P Deshpande, Gaddameedi Anil, Roma R Das, Abhishek Rathore, Tom Hash, Belum V S Reddy, Are Ashok Kumar
The low grain iron and zinc densities are well documented problems in food crops, affecting crop nutritional quality especially in cereals. Sorghum is a major source of energy and micronutrients for majority of population in Africa and central India. Understanding genetic variation, genotype × environment interaction and association between these traits is critical for development of improved cultivars with high iron and zinc. A total of 336 sorghum RILs (Recombinant Inbred Lines) were evaluated for grain iron and zinc concentration along with other agronomic traits for 2 years at three locations...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28528103/addition-of-exogenous-enzymes-to-diets-containing-grape-pomace-effects-on-intestinal-utilization-of-catechins-and-antioxidant-status-of-chickens
#6
S Chamorro, A Viveros, A Rebolé, I Arija, C Romero, I Alvarez, A Rey, A Brenes
Grape pomace (GP) is a rich source of polyphenols with antioxidant capacity. An experiment was conducted to study the effect of GP phenolic compounds included at 5 and 10%, and the addition (individually or combined) of hydrolyzing enzymes (carbohydrase enzyme complex and tannase at 500ppm) on intestinal utilization of catechins and antioxidant status in broiler chickens. A diet supplemented with 200ppm of α-tocopheryl acetate was also used. Our findings demonstrate the capacity of chickens to digest the monomeric (catechin, epicatechin, gallic acid, and epicatechin-O-gallate) and dimeric (procyanidin B1 and procyanidin B2) catechins present in grape pomace...
June 2017: Food Research International
https://www.readbyqxmd.com/read/28527389/dynamics-of-dissolved-organic-matter-in-riverine-sediments-affected-by-weir-impoundments-production-benthic-flux-and-environmental-implications
#7
Meilian Chen, Sung-Han Kim, Heon-Jae Jung, Jung-Ho Hyun, Jung Hyun Choi, Hyo-Jin Lee, In-Ae Huh, Jin Hur
In order to understand the characteristics and dynamics of dissolved organic matter (DOM) in the sediment of rivers affected by impoundments, we examined the vertical profiles and the benthic fluxes of DOM in four different core sediments located at upstream sites of weirs in major rivers of South Korea. In three out of four sites, exponential accumulation of dissolved organic carbon (DOC) with depth was observed with the signature of seasonal variability. Except for the site displaying a below-detection limit of Fe(II), the general accumulation trends of DOC with depth was concurrent with the increases of Fe(II) and NH4(+) and the decrease of PO4(3-), signifying a close linkage of the DOM dynamics with anaerobic respiration via iron reduction, an important early diagenesis pathway...
May 12, 2017: Water Research
https://www.readbyqxmd.com/read/28523645/enhancement-of-total-lipid-yield-by-nitrogen-carbon-and-iron-supplementation-in-isolated-microalgae
#8
Ramachandran Sivaramakrishnan, Aran Incharoensakdi
The biochemical contents and biodiesel production ability of three microalgal strains grown under different sodium nitrate, sodium carbonate, and ferric ammonium citrate (iron) levels were investigated. The highest biomass and lipid contents were found in Scenedesmus sp., Chlorella sp., and Chlamydomonas sp. when grown in normal BG-11 containing sodium carbonate concentration at 0.03 g · L(-1) , and in normal BG-11 containing iron concentration at 0.009 or 0.012 g · L(-1) . Increasing the sodium nitrate level increased the biomass content, but decreased the lipid content in all three microalgae...
May 18, 2017: Journal of Phycology
https://www.readbyqxmd.com/read/28517174/high-pressure-nias-type-modification-of-fen
#9
William P Clark, Simon Steinberg, Richard Dronskowski, Catherine McCammon, Ilya Kupenko, Maxim Bykov, Leonid Dubrovinsky, Lev G Akselrud, Ulrich Schwarz, Rainer Niewa
The combination of laser-heated diamond anvil cells and synchrotron Mössbauer source spectroscopy were used to investigate high-temperature high-pressure chemical reactions of iron and iron nitride Fe2 N with nitrogen. At pressures between 10 and 45 GPa, significant magnetic hyperfine splitting indicated compound formation after annealing at 1300 K. Subsequent in situ X-ray diffraction reveals a new modification of FeN with NiAs-type crystal structure, as also rationalized by first-principles total-energy and chemical-bonding studies...
May 18, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28515575/controls-of-primary-production-in-two-phytoplankton-blooms-in-the-antarctic-circumpolar-current
#10
C J M Hoppe, C Klaas, S Ossebaar, M A Soppa, W Cheah, L M Laglera, J Santos-Echeandia, B Rost, D A Wolf-Gladrow, A Bracher, M Hoppema, V Strass, S Trimborn
The Antarctic Circumpolar Current has a high potential for primary production and carbon sequestration through the biological pump. In the current study, two large-scale blooms observed in 2012 during a cruise with R.V. Polarstern were investigated with respect to phytoplankton standing stocks, primary productivity and nutrient budgets. While net primary productivity was similar in both blooms, chlorophyll a -specific photosynthesis was more efficient in the bloom closer to the island of South Georgia (39 °W, 50 °S) compared to the open ocean bloom further east (12 °W, 51 °S)...
April 2017: Deep-sea Research. Part II, Topical Studies in Oceanography
https://www.readbyqxmd.com/read/28515324/the-diferric-tyrosyl-radical-cluster-of-ribonucleotide-reductase-and-cytosolic-iron-sulfur-clusters-have-distinct-and-similar-biogenesis-requirements
#11
Haoran Li, Martin Stümpfig, Caiguo Zhang, Xiuxiang An, JoAnne Stubbe, Roland Lill, Mingxia Huang
How each metalloprotein assembles the correct metal at the proper binding site presents challenges to the cell. The di-iron enzyme ribonucleotide reductase (RNR) uses a diferric-tyrosyl radical (Fe(III)2-Y·) cofactor to initiate nucleotide reduction. Assembly of this cofactor requires O2, Fe(II), and a reducing equivalent. Recent studies show that RNR cofactor biosynthesis shares the same source of iron, in the form of [2Fe-2S]-GSH2 from the monothiol glutaredoxin Grx3/4, and the same electron source, in the form of the Dre2-Tah18 electron transfer chain, with the cytosolic iron-sulfur protein assembly (CIA) machinery required for maturation of [4Fe-4S] clusters in cytosolic and nuclear proteins...
May 17, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28515173/heme-oxygenase-1-mitigates-ferroptosis-in-renal-proximal-tubule-cells
#12
Oreoluwa Adedoyin, Ravindra Boddu, Amie M Traylor, Jeremie M Lever, Subhashini Bolisetty, James George, Anupam Agarwal
Ferroptosis is an iron-dependent form of regulated, non-apoptotic cell death, which contributes to damage in models of acute kidney injury (AKI). Heme oxygenase-1 (HO-1) is a cytoprotective enzyme induced in response to cellular stress, and is protective against AKI due to its anti-apoptotic and anti-inflammatory properties. However, the role of HO-1 in regulating ferroptosis is unclear. The purpose of this study was to elucidate the role of HO-1 in regulating ferroptotic cell death in renal proximal tubule cells (PTCs)...
May 17, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28505084/food-sources-of-energy-and-nutrients-in-infants-toddlers-and-young-children-from-the-mexican-national-health-and-nutrition-survey-2012
#13
Liya Denney, Myriam C Afeiche, Alison L Eldridge, Salvador Villalpando-Carrión
Food sources of nutrients in Mexican children are not well known. To fill the knowledge gap, dietary intake was assessed in 2057 children using a 24-hour dietary recall. All reported foods and beverages were assigned to one of 76 food groups. Percent contribution of each food group to nutrient intake was estimated for four age groups: 0-5.9, 6-11.9, 12-23.9, and 24-47.9 months. Breast milk, infant formula, and cow's milk were the top sources of energy and nutrients, especially in younger groups. Among infants aged 6-11...
May 13, 2017: Nutrients
https://www.readbyqxmd.com/read/28502049/evaluation-of-carbofuran-mediated-toxicity-against-human-lymphocytes-and-red-blood-cells-in-simulated-wastewater-degraded-by-coagulation-flocculation
#14
Roli Saini, Pradeep Kumar, Sumit Kumar Hira, Partha Pratim Manna
Coagulation-flocculation in water treatment has been relied upon aluminum (Al) and iron (Fe) salts for treatment of contaminants present in source waters containing dissolved organic compounds. However, water quality deteriorates day by day which makes it urgent to improve the standards of the treatment procedure. Coagulation-flocculation-sedimentation performance of ferric chloride and alum was comparatively investigated for carbofuran treatment in simulated wastewater. Coagulation trails were performed in a jar test at several pH levels and coagulant doses to determine reduction efficiencies of carbofuran degradation and chemical oxygen demand (COD)...
May 13, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28495571/role-of-iron-in-the-pathogenesis-of-respiratory-disease
#15
REVIEW
Md Khadem Ali, Richard Y Kim, Rafia Karim, Jemma R Mayall, Kristy L Martin, Ali Shahandeh, Firouz Abbasian, Malcolm R Starkey, Veronique Loustaud-Ratti, Daniel Johnstone, Elizabeth A Milward, Philip M Hansbro, Jay C Horvat
Iron is essential for many biological processes, however, too much or too little iron can result in a wide variety of pathological consequences, depending on the organ system, tissue or cell type affected. In order to reduce pathogenesis, iron levels are tightly controlled in throughout the body by regulatory systems that control iron absorption, systemic transport and cellular uptake and storage. Altered iron levels and/or dysregulated homeostasis have been associated with several lung diseases, including chronic obstructive pulmonary disease, lung cancer, cystic fibrosis, idiopathic pulmonary fibrosis and asthma...
May 7, 2017: International Journal of Biochemistry & Cell Biology
https://www.readbyqxmd.com/read/28494293/fate-of-arsenic-before-and-after-chemical-enhanced-washing-of-an-arsenic-containing-soil-in-hong-kong
#16
Jingzi Beiyuan, Jiang-Shan Li, Daniel C W Tsang, Lei Wang, Chi Sun Poon, Xiang-Dong Li, Scott Fendorf
This study evaluated the feasibility of 2-h chemical-enhanced washing of As-containing soil resulting from geogenic sources in Hong Kong and the fate of As before and after remediation. The soil morphology and As speciation in soil was elucidated by scanning electron microscopy with energy dispersive X-ray spectroscopy, X-ray diffractometer, X-ray photoelectron spectroscopy, and X-ray absorption spectroscopy. Integrated analysis of the results suggests that the As (>90%) resides predominantly as arsenate bound to ferric iron oxides, with a minor contribution (<10%) from an As(III)-sulphide phase...
May 8, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28494280/iron-mineralogy-as-a-fingerprint-of-former-steelmaking-activities-in-river-sediments
#17
Hussein Jaafar Kanbar, Emmanuelle Montargès-Pelletier, Benoit Losson, Isabelle Bihannic, Renaud Gley, Allan Bauer, Frederic Villieras, Luc Manceau, Antoine G El Samrani, Veronique Kazpard, Laurence Mansuy-Huault
Submerged sediment cores were collected upstream of a dam in the Orne River, northeastern France. This dam was built in the context of steelmaking to constitute a water reservoir for blast furnace cooling and wet cleaning of furnace smokes. The dam also enhanced sediment deposition in the upstream zone. This study was performed to unravel the contamination status of sediments and to evidence possible contribution sources. The sediment layers were analyzed for water content, grain size, chemical composition, crystalline phases at a bulk scale and poorly crystalline and amorphous phases at a sub-micrometer scale...
May 5, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28493182/modeling-seasonal-and-spatial-contamination-of-surface-waters-and-upper-sediments-with-trace-metal-elements-across-industrialized-urban-areas-of-the-seybouse-watershed-in-north-africa
#18
Bourhane-Eddine Belabed, Abderrafik Meddour, Boudjéma Samraoui, Haroun Chenchouni
Industrialization and urbanization are the main sources of pollutions worldwide and particularly in developing countries. This study aims the determination of anthropogenic inputs with trace metals in aquatic ecosystems at the Plain of Annaba (NE Algeria), which is known as one of the largest industrial areas in Africa. Samples of surface waters and upper sediments were conducted in six stations: four in Meboudja wadi and two in Seybouse wadi. Contents of iron, copper, chromium, nickel, zinc, and manganese were measured by atomic absorption spectrophotometry, whereas Cd and Pb were determined using electrothermal atomic absorption spectrometry...
June 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28492316/environmentally-persistent-free-radicals-in-soils-of-past-coking-sites-distribution-and-stabilization
#19
Hanzhong Jia, Song Zhao, Gulimire Nulaji, Kelin Tao, Fu Wang, Virender K Sharma, Chuanyi Wang
This study presents the existence of environmentally persistent free radicals (EPFRs) in soils of past coking sites, mainly contaminated by polycyclic aromatic hydrocarbons (PAHs). Measurements of EPFRs were conducted by electron paramagnetic resonance (EPR) technique with numerous soil samples, which were collected from different distances (0-1000 m) and different depths (0-30 cm) of three contaminant sources. EPR signals with ~ 3×1017 radicals/g of the soil samples were obtained, which are very similar to that generated in PAHs contaminated clays, i...
May 11, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28487094/the-bioeconomy-the-challenge-of-the-century-for-policy-makers
#20
REVIEW
Jim Philp
During the Industrial Revolution, it became clear that wood was unsuited as an energy source for industrial production, especially iron smelting. However, the transition to coal was the effort of decades. Similarly, the transition from coal to oil was neither a smooth nor rapid process. The transition to an energy and materials production regime based on renewable resources can similarly be expected to be fraught with many setbacks and obstacles, technically and politically. Those earlier transitions, however, were not complicated by the so-called grand challenges faced today...
May 6, 2017: New Biotechnology
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