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https://www.readbyqxmd.com/read/29775934/arsenic-speciation-dynamics-in-paddy-rice-soil-water-environment-sources-physico-chemical-and-biological-factors-a-review
#1
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/29775177/novosphingobium-arvoryzae-sp-nov-isolated-from-a-flooded-rice-field
#2
Shih-Yi Sheu, Cheng-Wen Huang, Jhen-Ci Chen, Zih-Han Chen, Wen-Ming Chen
A bacterial strain, designated Jyi-02T , was isolated from a flooded rice field in Taiwan and characterized using the polyphasic taxonomy approach. Cells of strain Jyi-02T were aerobic, Gram-stain-negative, rod-shaped, non-motile and formed yellowish orange coloured colonies. Growth occurred at 10-40 °C (optimum, 20 °C) and pH 5.0-9.0 (optimum, pH 7.0) and in the presence of 0-1.0 % NaCl (optimum, 0 %, w/v). The major fatty acids (>10 %) of strain Jyi-02T were C18 : 1ω7c, summed feature 3 (C16 : 1ω7c and/or C16 : 1ω6c) and C14 : 0 2-OH...
May 18, 2018: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/29773637/complete-genome-sequence-of-celeribacter-baekdonensis-strain-lh4-a-thiosulfate-oxidizing-alphaproteobacterial-isolate-from-gulf-of-mexico-continental-slope-sediments
#3
Beverly E Flood, Dalton Leprich, Jake V Bailey
We report here the closed genome sequences of Celeribacter baekdonensis strain LH4 and five unnamed plasmids obtained through PacBio sequencing with 99.99% consensus concordance. The genomes contained several distinctive features not found in other published Celeribacter genomes, including the potential to aerobically degrade styrene and other phenolic compounds.
May 17, 2018: Genome Announcements
https://www.readbyqxmd.com/read/29771877/cholera-epidemic-lusaka-zambia-october-2017-may-2018
#4
Nyambe Sinyange, Joan M Brunkard, Nathan Kapata, Mazyanga Lucy Mazaba, Kunda G Musonda, Raymond Hamoonga, Muzala Kapina, Fred Kapaya, Lwito Mutale, Ernest Kateule, Francis Nanzaluka, James Zulu, Chileshe Lukwesa Musyani, Alison V Winstead, William W Davis, Hammad S N'cho, Nelia L Mulambya, Patrick Sakubita, Orbie Chewe, Sulani Nyimbili, Ezinne V C Onwuekwe, Nedghie Adrien, Anna J Blackstock, Travis W Brown, Gordana Derado, Nancy Garrett, Sunkyung Kim, Sydney Hubbard, Amy M Kahler, Warren Malambo, Eric Mintz, Jennifer Murphy, Rupa Narra, Gouthami G Rao, Margaret A Riggs, Nicole Weber, Ellen Yard, Khozya D Zyambo, Nathan Bakyaita, Namani Monze, Kennedy Malama, Jabbin Mulwanda, Victor M Mukonka
On October 6, 2017, an outbreak of cholera was declared in Zambia after laboratory confirmation of Vibrio cholerae O1, biotype El Tor, serotype Ogawa, from stool specimens from two patients with acute watery diarrhea. The two patients had gone to a clinic in Lusaka, the capital city, on October 4. Cholera cases increased rapidly, from several hundred cases in early December 2017 to approximately 2,000 by early January 2018 (Figure). In collaboration with partners, the Zambia Ministry of Health (MoH) launched a multifaceted public health response that included increased chlorination of the Lusaka municipal water supply, provision of emergency water supplies, water quality monitoring and testing, enhanced surveillance, epidemiologic investigations, a cholera vaccination campaign, aggressive case management and health care worker training, and laboratory testing of clinical samples...
May 18, 2018: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/29770268/do-natural-disasters-affect-voting-behavior-evidence-from-croatian-floods
#5
Kosta Bovan, Benjamin Banai, Irena Pavela Banai
Introduction: Studies show that natural disasters influence voters' perception of incumbent politicians. To investigate whether voters are prone to punish politicians for events that are out of their control, this study was conducted in the previously unstudied context of Croatia, and by considering some of the methodological issues of previous studies. Method: Matching method technique was used, which ensures that affected and non-affected areas are matched on several control variables...
April 6, 2018: PLoS Currents
https://www.readbyqxmd.com/read/29763871/simulating-climate-change-and-socio-economic-change-impacts-on-flows-and-water-quality-in-the-mahanadi-river-system-india
#6
Li Jin, Paul G Whitehead, Harvey Rodda, Ian Macadam, Sananda Sarkar
Delta systems formed by the deposition of sediments at the mouths of large catchments are vulnerable to sea level rise and other climate change impacts. Deltas often have some of the highest population densities in the world and the Mahanadi Delta in India is one of these, with a population of 39 million. The Mahanadi River is a major river in East Central India and flows through Chattisgarh and Orissa states before discharging into the Bay of Bengal. This study uses an Integrated Catchment Model (INCA) to simulate flow dynamics and water quality (nitrogen and phosphorus) and to analyze the impacts of climate change and socio-economic drivers in the Mahanadi River system...
May 12, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29762550/hysogs250m-global-gridded-hydrologic-soil-groups-for-curve-number-based-runoff-modeling
#7
C Wade Ross, Lara Prihodko, Julius Anchang, Sanath Kumar, Wenjie Ji, Niall P Hanan
Hydrologic soil groups (HSGs) are a fundamental component of the USDA curve-number (CN) method for estimation of rainfall runoff; yet these data are not readily available in a format or spatial-resolution suitable for regional- and global-scale modeling applications. We developed a globally consistent, gridded dataset defining HSGs from soil texture, bedrock depth, and groundwater. The resulting data product-HYSOGs250m-represents runoff potential at 250 m spatial resolution. Our analysis indicates that the global distribution of soil is dominated by moderately high runoff potential, followed by moderately low, high, and low runoff potential...
May 15, 2018: Scientific Data
https://www.readbyqxmd.com/read/29760911/strong-associations-between-plant-genotypes-and-bacterial-communities-in-a-natural-salt-marsh
#8
Gregory P Zogg, Steven E Travis, Daniel A Brazeau
Although microbial communities have been shown to vary among plant genotypes in a number of experiments in terrestrial ecosystems, relatively little is known about this relationship under natural conditions and outside of select model systems. We reasoned that a salt marsh ecosystem, which is characterized by twice-daily flooding by tides, would serve as a particularly conservative test of the strength of plant-microbial associations, given the high degree of abiotic regulation of microbial community assembly resulting from alternating periods of inundation and exposure...
May 2018: Ecology and Evolution
https://www.readbyqxmd.com/read/29760109/shelf-ocean-exchange-and-hydrography-west-of-the-antarctic-peninsula-a-review
#9
REVIEW
C Moffat, M Meredith
The West Antarctic Peninsula (WAP) is a highly productive marine ecosystem where extended periods of change have been observed in the form of glacier retreat, reduction of sea-ice cover and shifts in marine populations, among others. The physical environment on the shelf is known to be strongly influenced by the Antarctic Circumpolar Current flowing along the shelf slope and carrying warm, nutrient-rich water, by cold waters flooding into the northern Bransfield Strait from the Weddell Sea, by an extensive network of glaciers and ice shelves, and by strong seasonal to inter-annual variability in sea-ice formation and air-sea interactions, with significant modulation by climate modes like El Niño-Southern Oscillation and the Southern Annular Mode...
June 28, 2018: Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
https://www.readbyqxmd.com/read/29758893/future-changes-in-yuan-river-ecohydrology-individual-and-cumulative-impacts-of-climates-change-and-cascade-hydropower-development-on-runoff-and-aquatic-habitat-quality
#10
Xin Wen, Zhehua Liu, Xiaohui Lei, Rongjie Lin, Guohua Fang, Qiaofeng Tan, Chao Wang, Yu Tian, Jin Quan
The eco-hydrological system in southwestern China is undergoing great changes in recent decades owing to climate change and extensive cascading hydropower exploitation. With a growing recognition that multiple drivers often interact in complex and nonadditive ways, the purpose of this study is to predict the potential future changes in streamflow and fish habitat quality in the Yuan River and quantify the individual and cumulative effect of cascade damming and climate change. The bias corrected and spatial downscaled Coupled Model Intercomparison Project Phase 5 (CMIP5) General Circulation Model (GCM) projections are employed to drive the Soil and Water Assessment Tool (SWAT) hydrological model and to simulate and predict runoff responses under diverse scenarios...
August 15, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29758863/particle-size-differentiation-explains-flow-regulation-controls-on-sediment-sorting-in-the-water-level-fluctuation-zone-of-the-three-gorges-reservoir-china
#11
Qiang Tang, Adrian L Collins, Anbang Wen, Xiubin He, Yuhai Bao, Dongchun Yan, Yi Long, Yusheng Zhang
The Three Gorges Dam has significantly interrupted fluvial continuity and modified the mass transfer regime along river continuums. Flow regulation following regular dam operations drives dramatic hydrological regime shifts, which facilitates sediment dispersal in the water-level fluctuation zone over episodic inundation periods. How flow regulation modulates sediment redistribution, however, remains unclear. In this study, we depict absolute particle size composition of suspended sediment and sink sediment in the water-level fluctuation zone, and these are interpreted in the context of flow regulation controls on sediment sorting...
August 15, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29758526/cadmium-dynamics-in-soil-pore-water-and-uptake-by-rice-influences-of-soil-applied-selenite-with-different-water-managements
#12
Yanan Wan, Aboubacar Younoussa Camara, Yao Yu, Qi Wang, Tianliang Guo, Lina Zhu, Huafen Li
Cadmium (Cd) in rice grains is a potential threat to human health. This study investigated the effects of selenite fertilisation (0 mg kg-1 , 0.5 mg kg-1 , and 1.0 mg kg-1 ) on soil solution Cd dynamics and rice uptake. Rice was grown in two Cd-contaminated soils in Jiangxi and Hunan Provinces under two different sets of conditions: aerobic and flooded. The experiments were conducted in pots. The plants were harvested at the seedling stage and at maturity to determine their Cd levels. Soil solutions were also extracted during the growing season to monitor Cd dynamics...
May 11, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29758398/defining-clogging-potential-for-permeable-concrete
#13
Alalea Kia, Hong S Wong, Christopher R Cheeseman
Permeable concrete is used to reduce urban flooding as it allows water to flow through normally impermeable infrastructure. It is prone to clogging by particulate matter and predicting the long-term performance of permeable concrete is challenging as there is currently no reliable means of characterising clogging potential. This paper reports on the performance of a range of laboratory-prepared and commercial permeable concretes, close packed glass spheres and aggregate particles of varying size, exposed to different clogging methods to understand this phenomena...
May 11, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29758308/synthesis-and-evaluation-of-acryloylated-starch-g-poly-acrylamide-vinylmethacrylate-1-vinyl-2-pyrrolidone-crosslinked-terpolymer-functionalized-by-dimethylphenylvinylsilane-derivative-as-a-novel-polymer-flooding-agent
#14
A N El-Hoshoudy, S M Desouky
Starch is a natural biopolymer that subjected to various chemical modifications through different industrial applications. Molecular structure of starch allow its grafting with different vinyl monomers in the presence of crosslinking agents to synthesize cross-linked hydrogels, which used in enhanced oil recovery (EOR) applications, water shutoff and drag reduction. Application of native starch in the field of petroleum reservoirs as a flooding agent suffer from some limitations concerned with microbial degradation, thermal and salinity resistance under harsh petroleum reservoir conditions...
May 11, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29756187/the-formation-of-unsaturated-zones-within-cemented-paste-backfill-mixtures-effects-on-the-release-of-copper-nickel-and-zinc
#15
Roger Hamberg, Christian Maurice, Lena Alakangas
Flooding of cemented paste backfill (CPB) filled mine workings is, commonly, a slow process and could lead to the formation of unsaturated zones within the CPB fillings. This facilitates the oxidation of sulfide minerals and thereby increases the risk of trace metal leaching. Pyrrhotitic tailings from a gold mine (cyanidation tailing (CT)), containing elevated concentrations of nickel (Ni), copper (Cu), and zinc (Zn), were mixed with cement and/or fly ash (1-3 wt%) to form CT-CPB mixtures. Pyrrhotite oxidation progressed more extensively during unsaturated conditions, where acidity resulted in dissolution of the Ni, Cu, and Zn associated with amorphous Fe precipitates and/or cementitious phases...
May 13, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29755448/low-light-anoxygenic-photosynthesis-and-fe-s-biogeochemistry-in-a-microbial-mat
#16
Sebastian Haas, Dirk de Beer, Judith M Klatt, Artur Fink, Rebecca McCauley Rench, Trinity L Hamilton, Volker Meyer, Brian Kakuk, Jennifer L Macalady
We report extremely low-light-adapted anoxygenic photosynthesis in a thick microbial mat in Magical Blue Hole, Abaco Island, The Bahamas. Sulfur cycling was reduced by iron oxides and organic carbon limitation. The mat grows below the halocline/oxycline at 30 m depth on the walls of the flooded sinkhole. In situ irradiance at the mat surface on a sunny December day was between 0.021 and 0.084 μmol photons m-2 s-1 , and UV light (<400 nm) was the most abundant part of the spectrum followed by green wavelengths (475-530 nm)...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29754487/aqueous-photolysis-of-benzobicyclon-hydrolysate
#17
Katryn L Williams, Richie Kaur, Alexander S McFall, Jacob Kalbfleisch, Joshua Gladfelder, David B Ball, Cort Anastasio, Ronald S Tjeerdema
Benzobicyclon (3-(2-chloro-4-(methylsulfonyl)benzoyl)-2-phenylthiobicyclo[3.2.1]oct-2-en-4-one) is a pro-herbicide used against resistant weeds in California rice fields. Persistence of its active product, benzobicyclon hydrolysate, is of concern. An acidic herbicide, the neutral species photolyzed faster than the more predominant anionic species (t1/2 = 1 h and 320 h, respectively; natural sunlight), from a >10-fold difference in quantum yield. Dissolved organic matter in natural waters reduced direct photolysis and increased indirect photolysis compared to high-purity water...
May 12, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29754088/sampling-of-suspended-particulate-matter-using-particle-traps-in-the-rh%C3%A3-ne-river-relevance-and-representativeness-for-the-monitoring-of-contaminants
#18
M Masson, H Angot, C Le Bescond, M Launay, A Dabrin, C Miège, J Le Coz, M Coquery
Monitoring hydrophobic contaminants in surface freshwaters requires measuring contaminant concentrations in the particulate fraction (sediment or suspended particulate matter, SPM) of the water column. Particle traps (PTs) have been recently developed to sample SPM as cost-efficient, easy to operate and time-integrative tools. But the representativeness of SPM collected with PTs is not fully understood, notably in terms of grain size distribution and particulate organic carbon (POC) content, which could both skew particulate contaminant concentrations...
May 10, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29754004/natural-disaster-related-prenatal-maternal-stress-is-associated-with-alterations-in-placental-glucocorticoid-system-the-qf2011-queensland-flood-study
#19
Joey St-Pierre, David P Laplante, Guillaume Elgbeili, Paul A Dawson, Sue Kildea, Suzanne King, Cathy Vaillancourt
We investigated the effects of a natural disaster (a sudden flood) as a source of prenatal maternal stress (PNMS) on the placental glucocorticoid system and glucose transporters. Whether the gestational age at the time of the flood moderated these effects was also evaluated. Placental samples were collected from participants in the 2011 Queensland Flood Study (QF2011) who were pregnant in the first or second trimester at the onset of the flood. Detailed questionnaire results for objective hardship and composite subjective distress were obtained to assess stress levels...
April 26, 2018: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/29753356/measurement-equivalence-of-patient-reported-outcome-measure-response-scale-types-collected-using-bring-your-own-device-compared-to-paper-and-a-provisioned-device-results-of-a-randomized-equivalence-trial
#20
Bill Byrom, Helen Doll, Willie Muehlhausen, Emuella Flood, Cater Cassedy, Bryan McDowell, Jeremy Sohn, Kyle Hogan, Ryan Belmont, Barbara Skerritt, Marie McCarthy
OBJECTIVES: The aim of this study was to assess the measurement equivalence of individual response scale types by using a patient reported outcome measure (PROM) collected on paper and migrated into electronic format for use on the subject's own mobile device (BYOD) and on a provisioned device (site device). METHODS: Subjects suffering from chronic health conditions causing daily pain or discomfort were invited to participate in this single-site, single visit, three-way crossover study...
May 2018: Value in Health: the Journal of the International Society for Pharmacoeconomics and Outcomes Research
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