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https://www.readbyqxmd.com/read/28929206/adaptive-management-of-environmental-flows-using-irrigation-infrastructure-to-deliver-environmental-benefits-during-a-large-hypoxic-blackwater-event-in-the-southern-murray-darling-basin-australia
#1
Robyn J Watts, R Keller Kopf, Nicole McCasker, Julia A Howitt, John Conallin, Ian Wooden, Lee Baumgartner
Widespread flooding in south-eastern Australia in 2010 resulted in a hypoxic (low dissolved oxygen, DO) blackwater (high dissolved carbon) event affecting 1800 kilometres of the Murray-Darling Basin. There was concern that prolonged low DO would result in death of aquatic biota. Australian federal and state governments and local stakeholders collaborated to create refuge areas by releasing water with higher DO from irrigation canals via regulating structures (known as 'irrigation canal escapes') into rivers in the Edward-Wakool system...
September 19, 2017: Environmental Management
https://www.readbyqxmd.com/read/28928214/fishing-out-the-hidden-enemy-advances-in-detecting-and-measuring-latent-hiv-infected-cells
#2
Vinayaka R Prasad, Ganjam V Kalpana
The indomitable aspect of HIV-1 infection is not that HIV-1 proviral DNA is integrated into host DNA but that it can also turn itself off, remaining invisible to drug or immune surveillance. Thus, the goals of eradication include ways to precisely excise HIV-1 DNA or wake up the silent HIV-1 provirus and eliminate the infected cells thus identified. Methods to identify and fish out the latently infected cells or to delineate their characteristics are being rapidly developed. In 2016, Baxter et al. (A. E. Baxter, J...
September 19, 2017: MBio
https://www.readbyqxmd.com/read/28923580/30-years-of-data-reveal-dramatic-increase-in-abundance-of-brown-trout-following-the-removal-of-a-small-hydrodam
#3
Kim Birnie-Gauvin, Martin H Larsen, Jan Nielsen, Kim Aarestrup
Humans and freshwater ecosystems have a long history of cohabitation. Today, nearly all major rivers of the world have an in-stream structure which changes water flow, substrate composition, vegetation, and fish assemblage composition. The realization of these effects and their subsequent impacts on population sustainability and conservation has led to a collective effort aimed to find ways to mitigate these impacts. Barrier removal has recently received greater interest as a potential solution to restore river connectivity, and reestablish high quality habitats, suitable for feeding, refuge and spawning of fish...
September 15, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28919952/variation-in-genome-size-and-karyotype-among-closely-related-aphid-parasitoids-hymenoptera-aphelinidae
#4
Vladimir E Gokhman, Kristen L Kuhn, James B Woolley, Keith R Hopper
Genome sizes were measured and determined for the karyotypes of nine species of aphid parasitoids in the genus Aphelinus Dalman,1820. Large differences in genome size and karyotype were found between Aphelinus species, which is surprising given the similarity in their morphology and life history. Genome sizes estimated from flow cytometry were larger for species in the Aphelinus mali (Haldeman, 1851) complex than those for the species in the Aphelinus daucicola Kurdjumov, 1913 and Aphelinus varipes (Förster,1841) complexes...
2017: Comparative Cytogenetics
https://www.readbyqxmd.com/read/28918279/seasonal-variation-of-chloro-s-triazines-in-the-hartbeespoort-dam-catchment-south-africa
#5
Cornelius Rimayi, David Odusanya, Jana M Weiss, Jacob de Boer, Luke Chimuka
Seasonal variation of eight chloro-s-triazine herbicides and seven major atrazine and terbuthylazine degradation products was monitored in the Hartbeespoort Dam catchment using gas chromatography-mass spectrometry (GC-MS) and liquid chromatography-mass spectrometry (LC-MS/MS). Lake, river and groundwater were sampled from the Hartbeespoort Dam catchment over four seasons and the downstream Jukskei River was monitored during the winter season. Triazine herbicide concentrations in the Hartbeespoort Dam were in the order atrazine>simazine>propazine>ametryn>prometryn throughout the four seasons sampled...
September 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28918079/clogging-of-an-alpine-streambed-by-silt-sized-particles-insights-from-laboratory-and-field-experiments
#6
Jasmin Fetzer, Markus Holzner, Michael Plötze, Gerhard Furrer
Clogging of streambeds by suspended particles (SP) can cause environmental problems, as it can negatively influence, e.g., habitats for macrozoobenthos, fish reproduction and groundwater recharge. This especially applies in the case of silt-sized SP. Until now, most research has dealt with coarse SP and was carried out in laboratory systems. The aims of this study are to examine (1) whether physical clogging by silt-sized SP exhibits the same dynamics and patterns as by sand-sized SP, and (2) the comparability of results between laboratory and field experiments...
September 7, 2017: Water Research
https://www.readbyqxmd.com/read/28917946/cellular-uptake-and-intracellular-localization-of-poly-acrylic-acid-nanoparticles-in-a-rainbow-trout-oncorhynchus-mykiss-gill-epithelial-cell-line-rtgill-w1
#7
Lindsey C Felix, Van A Ortega, Greg G Goss
The ever-growing production of engineered nanoparticles (NPs) for use in many agricultural, commercial, consumer, and industrial applications will lead to their accidental or intentional release into the environment. Potential routes of environmental exposure include manufacturing or transport spills, disposal of NP-containing products down the drain and/or in landfills, as well as direct usage on agricultural land. Therefore, NPs will inevitably contaminate aquatic environments and interact with resident organisms...
September 7, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28915373/bioaccumulation-of-metals-in-juvenile-rainbow-trout-oncorhynchus-mykiss-via-dietary-exposure-to-blue-mussels
#8
Gillian McEneff, Brian Quinn, Matthew Bennion, Sorcha Dolan, Kathleen O'Rourke, Liam Morrison
The potential for metals to bioaccumulate in aquatic species, such as fish, via trophic level transfer was investigated. An in vivo experiment was set up in a flow-through system in which juvenile rainbow trout were fed blue mussels collected from a Class A pristine site and an effluent-impacted river estuary, over a period of 28 days. Selected elements (As, Cd, Cr, Co, Cu, Fe, Pb, Mn, Mo, Ni, Se, Sn, V, Zn) were determined in the mussels and fish tissues (muscle and skin) collected at 0, 14 and 28 days. This study reveals the occurrence of metals in mussels sampled in the Irish marine environment and highlights the bioaccumulation potential of metals in fish tissues via trophic transfer...
August 29, 2017: Chemosphere
https://www.readbyqxmd.com/read/28913910/rapid-and-high-resolution-stable-isotopic-measurement-of-biogenic-accretionary-carbonate-using-an-online-co2-laser-ablation-system-standardization-of-the-analytical-protocol
#9
Arpita Sreemany, Melinda Kumar Bera, Anindya Sarkar
RATIONALE: The elaborate sampling and analytical protocol associated with the conventional dual-inlet isotope ratio mass spectrometry has long hindered high-resolution climate studies from biogenic accretionary carbonates. Laser-based on-line systems, in comparison, produce rapid data, but suffer from unresolvable matrix effects. It is, therefore, necessary to resolve these matrix effects to take advantage of the automated laser-based method. METHODS: Two marine bivalve shells (one aragonite and one calcite) and one fish otolith (aragonite) were first analysed using a CO2 laser ablation system attached to a continuous flow isotope ratio mass spectrometer under different experimental conditions (different laser power, sample untreated vs vacuum roasted)...
September 14, 2017: Rapid Communications in Mass Spectrometry: RCM
https://www.readbyqxmd.com/read/28898932/effects-of-thermopeaking-on-the-thermal-response-of-alpine-river-systems-to-heatwaves
#10
Meili Feng, Guido Zolezzi, Martin Pusch
Within the past 30years there have been two major heatwave events (in 2003 and 2006) that broke 500-year-old temperature records in Europe. Owing to the growing concern of rising temperatures, we analyzed the potential response in a number of river sections that are subject to hydropeaking and thermopeaking through the intermittent release of water from hydropower stations. Thermopeaking in alpine streams is known to intermittently cool down the river water in summer and to warm it up in winter. We analyzed the response of river water temperature to air temperature during heatwaves at 19 gauging stations across Switzerland, using a 30-yr dataset at a 10-min resolution...
September 7, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28898753/efficiency-of-a-nature-like-bypass-channel-for-restoring-longitudinal-connectivity-for-a-river-resident-population-of-brown-trout
#11
Jamie R Dodd, Ian G Cowx, Jonathan D Bolland
Man-made, physical barriers have disrupted longitudinal connectivity for migratory fish in many river systems throughout the world for centuries. These barriers are considered to be a key reason for the decline of many fish species in river systems. To date, most research to ease movement of anadromous salmonids past such barriers to help dwindling populations has focused on the use of technical fishways. More recently emphasis has been placed on nature-like fishways to enable a wider range of fish species to bypass these barriers, but few studies have examined their efficacy...
September 9, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28893281/rna-flow-cytometric-fish-for-investigations-into-hiv-immunology-vaccination-and-cure-strategies
#12
REVIEW
Amy E Baxter, Julia Niessl, Antigoni Morou, Daniel E Kaufmann
Despite the tremendous success of anti-retroviral therapy (ART) no current treatment can eradicate latent HIV reservoirs from HIV-infected individuals or generate, effective HIV-specific immunity. Technological limitations have hampered the identification and characterization of both HIV-infected cells and HIV-specific responses in clinical samples directly ex vivo. RNA-flow cytometric fluorescence in situ hybridisation (RNA Flow-FISH) is a powerful technique, which enables detection of mRNAs in conjunction with proteins at a single-cell level...
September 12, 2017: AIDS Research and Therapy
https://www.readbyqxmd.com/read/28888536/in%C3%A2-vitro-immunostimulatory-potential-of-fungal-%C3%AE-glucans-in-pacific-red-snapper-lutjanus-peru-cells
#13
Tomás Cárdenas-Reyna, Carlos Angulo, Crystal Guluarte, Sawako Hori-Oshima, Martha Reyes-Becerril
This study attempts to describe the immunostimulatory effects of three fungal glucans on innate immunity responses in an in vitro assays using Pacific red snapper leukocytes. First, the yield glucans obtained was higher in Aspergillus niger, follow by Aspergillus ochraceus and Alternaria botrytis (40, 20 and 10%, respectively). Structural characterization of these fungal glucans by proton nuclear magnetic resonance (NMR) indicated structures containing (1-6)-branched (1-3)-β-D-glucan. The immunostimulatory activity of fungal glucans were assessed in head-kidney leukocytes at 24 h using colorimetric assays and molecular gene expression...
September 6, 2017: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/28883085/hydrodynamic-function-of-dorsal-fins-in-spiny-dogfish-and-bamboo-sharks-during-steady-swimming
#14
Anabela Maia, George V Lauder, Cheryl D Wilga
A key feature of fish functional design is the presence of multiple fins that allow thrust vectoring and redirection of fluid momentum to contribute to both steady swimming and maneuvering. A number of previous studies have analyzed the function of dorsal fins in teleost fishes in this context, but the hydrodynamic function of dorsal fins in freely-swimming sharks has not been analyzed, despite the potential for differential functional roles between the anterior and posterior dorsal fins. Previous anatomical research has suggested a primarily stabilizing role for shark dorsal fins...
September 7, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28880280/multiparametric-characterization-of-rare-hiv-infected-cells-using-an-rna-flow-fish-technique
#15
Amy E Baxter, Julia Niessl, Rémi Fromentin, Jonathan Richard, Filippos Porichis, Marta Massanella, Nathalie Brassard, Nirmin Alsahafi, Jean-Pierre Routy, Andrés Finzi, Nicolas Chomont, Daniel E Kaufmann
Efforts to cure HIV are hampered by limited characterization of the cells supporting HIV replication in vivo and inadequate methods for quantifying the latent viral reservoir in individuals receiving antiretroviral therapy (ART). We describe a protocol for flow cytometric identification of viral reservoirs, based on concurrent detection of cellular HIV Gagpol mRNA by in situ RNA hybridization combined with antibody staining for the HIV Gag protein. By simultaneously detecting both HIV RNA and protein, the CD4 T cells harboring translation-competent virus can be identified...
October 2017: Nature Protocols
https://www.readbyqxmd.com/read/28879655/pretreatment-with-fish-oil-attenuates-heart-ischemia-consequences-in-rats
#16
Alcione Lescano de Souza Junior, Jorge Mancini Filho, Rosângela Pavan Torres, Maria Cláudia Irigoyen, Rui Curi
Omega-3 polyunsaturated fatty acid (ω-3 PUFA)-rich fish oil supplementation has protective effects on heart ischemic injury. Left ventricular (LV) ischemia was induced in rats by permanent ligation of the left coronary artery. Saline, fish oil or soybean oil was administered daily by gavage (3 g kg(-1) b.w.) for 20 days before inducing ischemia. Outcomes were assessed 24 hours after left coronary artery ligation. Pretreatment with fish oil decreased the ω-6/ω-3 fatty acid ratio in the LV. Reduction in infarct size and in the intensity of ventricular systolic dysfunction was found in the fish oil group as compared with the saline or soybean oil groups through echocardiographic evaluation...
September 6, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/28877382/incorporating-fragmentation-and-non-native-species-into-distribution-models-to-inform-fluvial-fish-conservation
#17
Andrew T Taylor, Monica Papeş, James M Long
Fluvial fishes face increased imperilment from anthropogenic activities, but the specific factors contributing most to range declines are often poorly understood. For example, the shoal bass (Micropterus cataractae) is a fluvial-specialist species experiencing continual range loss, yet how perceived threats have contributed to range loss is largely unknown. We employed species distribution models (SDMs) to disentangle which factors are contributing most to shoal bass range loss by estimating a potential distribution based on natural abiotic factors and by estimating a series of current, occupied distributions that also incorporated variables characterizing land cover, non-native species, and fragmentation intensity (no fragmentation, dams only, and dams and large impoundments)...
September 6, 2017: Conservation Biology: the Journal of the Society for Conservation Biology
https://www.readbyqxmd.com/read/28875355/is-there-an-association-between-flow-diverter-fish-mouthing-and-delayed-type-hypersensitivity-to-metals-a-case-control-study
#18
Naci Kocer, Prabath Kumar Mondel, Elif Yamac, Ayse Kavak, Osman Kizilkilic, Civan Islak
PURPOSE: Flow diverters are increasingly used in the treatment of complex and giant intracranial aneurysms. However, they are associated with complications like late aneurysmal rupture. Additionally, flow diverters show focal structural decrease in luminal diameter without any intimal hyperplasia. This resembles a "fish mouth" when viewed en face. In this pilot study, we tested the hypothesis of a possible association between flow diverter fish-mouthing and delayed-type hypersensitivity to its metal constituents...
September 5, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28873356/follicular-lymphoma-with-hyaline-vascular-castleman-like-features-analysis-of-6-cases-and-review-of-the-literature
#19
Sergio Pina-Oviedo, Roberto N Miranda, Pei Lin, John T Manning, L Jeffrey Medeiros
Follicular lymphoma (FL) with features reminiscent of hyaline-vascular Castleman disease (CD) is an unusual morphologic variant that may create diagnostic difficulties. To our knowledge, only 5 cases of this variant have been reported. We describe the clinicopathologic features of 6 cases including 2 men and 4 women with a median age of 63years (range, 41-77). Morphologically, all lymph node biopsy specimens showed at least a focal area of conventional FL; 4 cases showed neoplastic follicles with hyalinized blood vessels penetrating into germinal centers (lollipop-like lesions); 4 cases had interfollicular areas with increased vascular stroma, 2 cases showed small neoplastic follicles with prominent, onion skin-like mantle zones, and 1 case showed two or more germinal centers within follicles (twinning)...
September 2, 2017: Human Pathology
https://www.readbyqxmd.com/read/28865268/effects-of-resource-availability-and-hydrological-regime-on-autochthonous-and-allochthonous-carbon-in-the-food-web-of-a-large-cross-border-river-china
#20
Yuanyuan Zheng, Jiangong Niu, Qiong Zhou, Congxin Xie, Zhixin Ke, Dapeng Li, Yongwen Gao
Resource availability and flooding disturbance restrict the amount of energy available to the upper trophic level consumers and thus determine the trophic structure and energy mobilization in river food webs. In this study, we evaluated the availability of primary and secondary food resources, food web structure (determined by δ(13)C and δ(15)N) and relative contributions of autochthonous and allochthonous particulate carbon to aquatic consumers in the Irtysh River, which spans from northwest China to Kazakhstan and suffers from a long frozen period...
August 30, 2017: Science of the Total Environment
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