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https://www.readbyqxmd.com/read/27896426/expression-and-characterization-of-a-codon-optimized-alkaline-stable-carbonic-anhydrase-from-aliivibrio-salmonicida-for-co2-sequestration-applications
#1
So-Young Jun, Sung Ho Kim, Bashista Kumar Kanth, Jinwon Lee, Seung Pil Pack
The CO2 mineralization process, accelerated by carbonic anhydrase (CA) was proposed for the efficient capture and storage of CO2, the accumulation of which in the atmosphere is the main cause of global warming. Here, we characterize a highly stable form of the cloned CA from the Gram-negative marine bacterium Aliivibrio salmonicida, named ASCA that can promote CO2 absorption in an alkaline solvent required for efficient carbon capture. We designed a mature form of ASCA (mASCA) using a codon optimization of ASCA gene and removal of ASCA signal peptide...
November 28, 2016: Bioprocess and Biosystems Engineering
https://www.readbyqxmd.com/read/27858274/the-assessment-of-source-attribution-of-soil-pollution-in-a-typical-e-waste-recycling-town-and-its-surrounding-regions-using-the-combined-organic-and-inorganic-dataset
#2
Jie Luo, Shihua Qi, Xianming Xie, X W Sophie Gu, Jinji Wang
Guiyu is a well-known electronic waste dismantling and recycling town in south China. Concentrations and distribution of the 21 mineral elements and 16 polycyclic aromatic hydrocarbons (PAHs) collected there were evaluated. Principal component analyses (PCA) applied to the data matrix of PAHs in the soil extracted three major factors explaining 85.7% of the total variability identified as traffic emission, coal combustion, and an unidentified source. By using metallic or metalloid element concentrations as variables, five principal components (PCs) were identified and accounted for 70...
November 17, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27852903/effects-of-teriparatide-compared-with-risedronate-on-recovery-after-pertrochanteric-hip-fracture-results-of-a-randomized-active-controlled-double-blind-clinical-trial-at-26-weeks
#3
Per Aspenberg, Jorge Malouf, Umberto Tarantino, Pedro A García-Hernández, Costantino Corradini, Søren Overgaard, Jan J Stepan, Lars Borris, Eric Lespessailles, Frede Frihagen, Kyriakos Papavasiliou, Helmut Petto, José Ramón Caeiro, Fernando Marin
BACKGROUND: Osteoporosis drugs might affect fracture-healing. We therefore studied the effects of teriparatide in comparison with risedronate on recovery after pertrochanteric hip fractures. METHODS: The study was a randomized, multicenter, active-controlled, 78-week trial comparing teriparatide (20 μg/day) with risedronate (35 mg/week) initiated within 2 weeks after fixation of a low-trauma pertrochanteric hip fracture (AO/OTA 31-A1 or 31-A2). The main inclusion criteria were a bone mineral density T-score of ≤-2...
November 16, 2016: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/27852448/isotopic-evidence-of-nitrogen-sources-and-nitrogen-transformation-in-arsenic-contaminated-groundwater
#4
Tsung-Nan Weng, Chen-Wuing Liu, Yu-Hsuan Kao, Silver Sung-Yun Hsiao
High concentrations of naturally occurring arsenic (As) are typically found in young alluvial and deltaic deposits, and high concentrations of ammonium (NH4(+)) and nitrate (NO3(-)) are often present in groundwater affected by anthropogenic activities. In this study, on the basis of physicochemical characteristics of groundwater and the nitrogen and oxygen isotope composition of NO3(-), it was inferred that the main sources of NO3(-) in the proximal fan of the Choushui River alluvial fan are likely to be ammonium fertilizers, manure, and septic waste; that in the mid-fan and the distal fan, the possible sources are nitrate fertilizers and marine nitrate...
November 13, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27847499/abundance-and-distribution-of-enteric-bacteria-and-viruses-in-coastal-and-estuarine-sediments-a-review
#5
REVIEW
Francis Hassard, Ceri L Gwyther, Kata Farkas, Anthony Andrews, Vera Jones, Brian Cox, Howard Brett, Davey L Jones, James E McDonald, Shelagh K Malham
The long term survival of fecal indicator organisms (FIOs) and human pathogenic microorganisms in sediments is important from a water quality, human health and ecological perspective. Typically, both bacteria and viruses strongly associate with particulate matter present in freshwater, estuarine and marine environments. This association tends to be stronger in finer textured sediments and is strongly influenced by the type and quantity of clay minerals and organic matter present. Binding to particle surfaces promotes the persistence of bacteria in the environment by offering physical and chemical protection from biotic and abiotic stresses...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27846794/genome-and-catabolic-subproteomes-of-the-marine-nutritionally-versatile-sulfate-reducing-bacterium-desulfococcus-multivorans-dsm-2059
#6
Marvin Dörries, Lars Wöhlbrand, Michael Kube, Richard Reinhardt, Ralf Rabus
BACKGROUND: Sulfate-reducing bacteria (SRB) are key players of the carbon- and sulfur-cycles in the sediments of the world's oceans. Habitat relevant SRBs are often members of the Desulfosarcina-Desulfococcus clade belonging to the deltaproteobacterial family of Desulfobacteraceae. Despite this environmental recognition, their molecular (genome-based) physiology and their potential to contribute to organic carbon mineralization as well as to adapt to changing environmental conditions have been scarcely investigated...
November 15, 2016: BMC Genomics
https://www.readbyqxmd.com/read/27843721/antioxidant-nutrition-in-atlantic-salmon-salmo-salar-parr-and-post-smolt-fed-diets-with-high-inclusion-of-plant-ingredients-and-graded-levels-of-micronutrients-and-selected-amino-acids
#7
Kristin Hamre, Nini H Sissener, Erik-Jan Lock, Pål A Olsvik, Marit Espe, Bente E Torstensen, Joana Silva, Johan Johansen, Rune Waagbø, Gro-Ingunn Hemre
The shift from marine to plant-based ingredients in fish feeds affects the dietary concentrations and bioavailability of micronutrients, amino acids and lipids and consequently warrants a re-evaluation of dietary nutrient recommendations. In the present study, an Atlantic salmon diet high in plant ingredients was supplemented with graded levels of nutrient premix (NP), containing selected amino acids, taurine, cholesterol, vitamins and minerals. This article presents the results on the antioxidant nutrients vitamin C, E and selenium (Se), and effects on tissue redox status...
2016: PeerJ
https://www.readbyqxmd.com/read/27836270/geochemistry-of-recent-aragonite-rich-sediments-in-mediterranean-karstic-marine-lakes-trace-elements-as-pollution-and-palaeoredox-proxies-and-indicators-of-authigenic-mineral-formation
#8
Ivan Sondi, Nevenka Mikac, Neda Vdović, Maja Ivanić, Martina Furdek, Srečo D Škapin
This study investigates the geochemical characteristics of recent shallow-water aragonite-rich sediments from the karstic marine lakes located in the pristine environment on the island of Mljet (Adriatic Sea). Different trace elements were used as authigenic mineral formation, palaeoredox and pollution indicators. The distribution and the historical record of trace elements deposition mostly depended on the sedimentological processes associated with the formation of aragonite, early diagenetic processes governed by the prevailing physico-chemical conditions and on the recent anthropogenic activity...
November 8, 2016: Chemosphere
https://www.readbyqxmd.com/read/27827457/evidence-of-anomalously-low-%C3%AE-13-c-of-marine-organic-matter-in-an-arctic-fjord
#9
Vikash Kumar, Manish Tiwari, Siddhesh Nagoji, Shubham Tripathi
Accurate estimation of relative carbon deposition (marine vs. terrestrial) is required for understanding the global carbon budget, particularly in the Arctic region, which holds disproportionate importance with respect to global carbon cycling. Although the sedimentary organic matter (SOM) concentration and its isotopic composition are important tools for such calculations, uncertainties loom over estimates provided by organic-geochemical bulk parameters. We report carbon and nitrogen concentrations and isotopes (δ(13)C and δ(15)N) of SOM at an Arctic fjord namely Kongsfjorden...
November 9, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27826293/assessing-marine-microbial-induced-corrosion-at-santa-catalina-island-california
#10
Gustavo A Ramírez, Colleen L Hoffman, Michael D Lee, Ryan A Lesniewski, Roman A Barco, Arkadiy Garber, Brandy M Toner, Charles G Wheat, Katrina J Edwards, Beth N Orcutt
High iron and eutrophic conditions are reported as environmental factors leading to accelerated low-water corrosion, an enhanced form of near-shore microbial induced corrosion. To explore this hypothesis, we deployed flow-through colonization systems in laboratory-based aquarium tanks under a continuous flow of surface seawater from Santa Catalina Island, CA, USA, for periods of 2 and 6 months. Substrates consisted of mild steel - a major constituent of maritime infrastructure - and the naturally occurring iron sulfide mineral pyrite...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27791286/biodegradation-and-mineralization-of-isotopically-labeled-tnt-and-rdx-in-anaerobic-marine-sediments
#11
Thivanka Ariyarathna, Penny Vlahos, Richard W Smith, Stephen Fallis, Thomas Groshens, Craig Tobias
The lack of knowledge on fate of explosive compounds, 2,4,6-trinitrotoluene (TNT) and hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) particularly in marine ecosystems constrains the application of bioremediation techniques in explosive-contaminated coastal sites. Here, we present a comparative study on anaerobic biodegradation and mineralization of (15) N-nitro group isotopically labeled TNT and RDX in organic-carbon-rich, fine-grained marine sediment with native microbial assemblages. Separate sediment slurry experiments were carried out for TNT and RDX at 23°C for 16 days...
October 28, 2016: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/27769773/antibacterial-activity-of-oxytetracycline-photoproducts-in-marine-aquaculture-s-water
#12
J F Leal, I S Henriques, A Correia, E B H Santos, V I Esteves
Oxytetracycline (OTC) is one of the most used antibiotics in aquaculture. The main concern related to its use is the bacterial resistance, when ineffective treatments are applied for its removal or inactivation. OTC photo-degradation has been suggested as an efficient complementary process to conventional methods used in intensive fish production (e.g.: ozonation). Despite this, and knowing that the complete mineralization of OTC is difficult, few studies have examined the antibacterial activity of OTC photoproducts...
January 2017: Environmental Pollution
https://www.readbyqxmd.com/read/27761315/metagenomic-survey-of-methanesulfonic-acid-msa-catabolic-genes-in-an-atlantic-ocean-surface-water-sample-and-in-a-partial-enrichment
#13
Ana C Henriques, Rui M S Azevedo, Paolo De Marco
Methanesulfonic acid (MSA) is a relevant intermediate of the biogeochemical cycle of sulfur and environmental microorganisms assume an important role in the mineralization of this compound. Several methylotrophic bacterial strains able to grow on MSA have been isolated from soil or marine water and two conserved operons, msmABCD coding for MSA monooxygenase and msmEFGH coding for a transport system, have been repeatedly encountered in most of these strains. Homologous sequences have also been amplified directly from the environment or observed in marine metagenomic data, but these showed a base composition (G + C content) very different from their counterparts from cultivated bacteria...
2016: PeerJ
https://www.readbyqxmd.com/read/27761134/microbial-sulfate-reduction-potential-in-coal-bearing-sediments-down-to-2-5-km-below-the-seafloor-off-shimokita-peninsula-japan
#14
Clemens Glombitza, Rishi R Adhikari, Natascha Riedinger, William P Gilhooly, Kai-Uwe Hinrichs, Fumio Inagaki
Sulfate reduction is the predominant anaerobic microbial process of organic matter mineralization in marine sediments, with recent studies revealing that sulfate reduction not only occurs in sulfate-rich sediments, but even extends to deeper, methanogenic sediments at very low background concentrations of sulfate. Using samples retrieved off the Shimokita Peninsula, Japan, during the Integrated Ocean Drilling Program (IODP) Expedition 337, we measured potential sulfate reduction rates by slurry incubations with (35)S-labeled sulfate in deep methanogenic sediments between 1276...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27725345/bacterial-community-structures-in-freshwater-polar-environments-of-svalbard
#15
Spyridon Ntougias, Żaneta Polkowska, Sofia Nikolaki, Eva Dionyssopoulou, Panagiota Stathopoulou, Vangelis Doudoumis, Marek Ruman, Katarzyna Kozak, Jacek Namieśnik, George Tsiamis
Two thirds of Svalbard archipelago islands in the High Arctic are permanently covered with glacial ice and snow. Polar bacterial communities in the southern part of Svalbard were characterized using an amplicon sequencing approach. A total of 52,928 pyrosequencing reads were analyzed in order to reveal bacterial community structures in stream and lake surface water samples from the Fuglebekken and Revvatnet basins of southern Svalbard. Depending on the samples examined, bacterial communities at a higher taxonomic level mainly consisted either of Bacteroidetes, Betaproteobacteria, and Microgenomates (OP11) or Planctomycetes, Betaproteobacteria, and Bacteroidetes members, whereas a population of Microgenomates was prominent in 2 samples...
September 30, 2016: Microbes and Environments
https://www.readbyqxmd.com/read/27707602/effects-of-mineral-amendments-on-trace-elements-leaching-from-pre-treated-marine-sediment-after-simulated-rainfall-events
#16
C Hurel, M Taneez, A Volpi Ghirardini, G Libralato
Bauxite extraction by-products (red mud) were used to evaluate their potential ability to stabilize trace elements from dredged and aerated/humidified marine sediment. The investigated by-products were: bauxaline(®)(BX) that is a press-filtered red mud; bauxsol™(BS) that is a press-filtered red mud previously washed with excess of seawater, and gypsum neutralized bauxaline(®) (GBX). These materials were separately mixed to dredged composted sediment sample considering 5% and 20% sediment: stabilizer ratios...
January 2017: Environmental Pollution
https://www.readbyqxmd.com/read/27694946/a-proteinaceous-organic-matrix-regulates-carbonate-mineral-production-in-the-marine-teleost-intestine
#17
Kevin L Schauer, Christophe M R LeMoine, Adrian Pelin, Nicolas Corradi, Wesley C Warren, Martin Grosell
Marine teleost fish produce CaCO3 in their intestine as part of their osmoregulatory strategy. This precipitation is critical for rehydration and survival of the largest vertebrate group on earth, yet the molecular mechanisms that regulate this reaction are unknown. Here, we isolate and characterize an organic matrix associated with the intestinal precipitates produced by Gulf toadfish (Opsanus beta). Toadfish precipitates were purified using two different methods, and the associated organic matrix was extracted...
October 3, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27678297/return-of-naturally-sourced-pb-to-atlantic-surface-waters
#18
Luke Bridgestock, Tina van de Flierdt, Mark Rehkämper, Maxence Paul, Rob Middag, Angela Milne, Maeve C Lohan, Alex R Baker, Rosie Chance, Roulin Khondoker, Stanislav Strekopytov, Emma Humphreys-Williams, Eric P Achterberg, Micha J A Rijkenberg, Loes J A Gerringa, Hein J W de Baar
Anthropogenic emissions completely overwhelmed natural marine lead (Pb) sources during the past century, predominantly due to leaded petrol usage. Here, based on Pb isotope measurements, we reassess the importance of natural and anthropogenic Pb sources to the tropical North Atlantic following the nearly complete global cessation of leaded petrol use. Significant proportions of up to 30-50% of natural Pb, derived from mineral dust, are observed in Atlantic surface waters, reflecting the success of the global effort to reduce anthropogenic Pb emissions...
2016: Nature Communications
https://www.readbyqxmd.com/read/27660607/nitrogen-cycling-process-rates-across-urban-ecosystems
#19
Alexander J Reisinger, Peter M Groffman, Emma J Rosi-Marshall
Nitrogen (N) pollution of freshwater, estuarine, and marine ecosystems is widespread and has numerous environmental and economic impacts. A portion of this excess N comes from urban watersheds comprised of natural and engineered ecosystems which can alter downstream N export. Studies of urban N cycling have focused on either specific ecosystems or on watershed-scale mass balances. Comparisons of specific N transformations across ecosystems are required to contextualize rates from individual studies. Here we reviewed urban N cycling in terrestrial, aquatic, and engineered ecosystems, and compared N processing in these urban ecosystem types to native reference ecosystems...
September 21, 2016: FEMS Microbiology Ecology
https://www.readbyqxmd.com/read/27648533/anthropogenic-versus-mineral-aerosols-in-the-stimulation-of-microbial-planktonic-communities-in-coastal-waters-of-the-northwestern-mediterranean-sea
#20
I Marín, S Nunes, E D Sánchez-Pérez, F L Aparicio, M Estrada, C Marrasé, T Moreno, T Wagener, X Querol, F Peters
The atmosphere of the northwestern (NW) Mediterranean Sea is affected by continuous inputs of anthropogenic aerosols and episodic Saharan dust events. These atmospheric inputs deliver to the surface waters high amounts of macronutrients and trace metals that can constitute their main source at certain times of the year. The effect of both anthropogenic and crustal particles over the autotrophic and heterotrophic planktonic community assembles was evaluated through three microcosm experiments carried out in the summer of 2013 and in the winter and spring of 2014 at an urban coastal location of the NW Mediterranean (Barcelona, Spain)...
September 17, 2016: Science of the Total Environment
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