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https://www.readbyqxmd.com/read/28526686/amazon-river-dolphins-inia-geoffrensis-modify-biosonar-output-level-and-directivity-during-prey-interception-in-the-wild
#1
Michael Ladegaard, Frants Havmand Jensen, Kristian Beedholm, Vera Maria Ferreira da Silva, Peter Teglberg Madsen
Toothed whales have evolved to live in extremely different habitats and yet they all rely strongly on echolocation for finding and catching prey. Such biosonar based foraging involves distinct phases of searching for, approaching, and capturing prey, where echolocating animals gradually adjust sonar output to actively shape the flow of sensory information. Measuring those outputs in absolute levels requires hydrophone arrays centred on the biosonar beam axis, but this has never been done for wild toothed whales approaching and capturing prey...
May 19, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28521628/cd36-positive-b-lymphoblasts-predict-poor-outcome-in-children-with-b-lymphoblastic-leukemia
#2
Joanna G Newton, John T Horan, Scott Newman, Michael R Rossi, Rhett P Ketterling, Sunita I Park
Objective We observed that pediatric patients with B lymphoblastic leukemia which expressed CD36 at diagnosis seemed to have worse outcome than patients whose blasts did not. Here, we describe the patient, disease characteristics, pathological, molecular, and genetic features and outcomes of patients with CD36+ B-LL compared to patients with CD36- B-LL. Methods We retrospectively reviewed all flow cytometry reports from September 2008 to December 2015 to identify patients diagnosed at our institution with CD36 expression on B lymphoblasts...
June 2017: Pediatric and Developmental Pathology
https://www.readbyqxmd.com/read/28518171/fish-flow-a-protocol-for-the-concurrent-detection-of-mrna-and-protein-in-single-cells-using-fluorescence-in-situ-hybridization-and-flow-cytometry
#3
Riccardo Arrigucci, Yuri Bushkin, Felix Radford, Karim Lakehal, Pooja Vir, Richard Pine, December Martin, Jeffrey Sugarman, Yanlin Zhao, George S Yap, Alfred A Lardizabal, Sanjay Tyagi, Maria Laura Gennaro
We describe a flow-cytometry-based protocol for intracellular mRNA measurements in nonadherent mammalian cells using fluorescence in situ hybridization (FISH) probes. The method, which we call FISH-Flow, allows for high-throughput multiparametric measurements of gene expression, a task that was not feasible with earlier, microscopy-based approaches. The FISH-Flow protocol involves cell fixation, permeabilization and hybridization with a set of fluorescently labeled oligonucleotide probes. In this protocol, surface and intracellular protein markers can also be stained with fluorescently labeled antibodies for simultaneous protein and mRNA measurement...
June 2017: Nature Protocols
https://www.readbyqxmd.com/read/28515781/evolutionary-restoration-potential-evaluated-through-the-use-of-a-trait-linked-genetic-marker
#4
Travis M Apgar, Devon E Pearse, Eric P Palkovacs
Human-driven evolution can impact the ecological role and conservation value of impacted populations. Most evolutionary restoration approaches focus on manipulating gene flow, but an alternative approach is to manipulate the selection regime to restore historical or desired trait values. Here we examined the potential utility of this approach to restore anadromous migratory behavior in coastal California steelhead trout (Oncorhynchus mykiss) populations. We evaluated the effects of natural and anthropogenic environmental variables on the observed frequency of alleles at a genomic marker tightly associated with migratory behavior across 39 steelhead populations from across California, USA...
June 2017: Evolutionary Applications
https://www.readbyqxmd.com/read/28515389/ca-2-in-hybridization-solutions-for-fluorescence-in-situ-hybridization-facilitates-the-detection-of-enterobacteriaceae
#5
Shin Haruta, Takao Iino, Moriya Ohkuma, Ken-Ichiro Suzuki, Yasuo Igarashi
Fluorescence in situ hybridization (FISH) has been employed to identify microorganisms at the single cell level under a microscope. Extensive efforts have been made to improve and extend the FISH technique; however, the development of a widely applicable protocol is a continuing challenge. The present study evaluated the effects of divalent cations in the hybridization solution on the FISH-based detection of various species of bacteria and archaea with rRNA-targeted probes. A flow cytometric analysis after FISH with a standard hybridization buffer detected positive signals from less than 30% of Escherichia coli IAM 1264 cells...
May 18, 2017: Microbes and Environments
https://www.readbyqxmd.com/read/28515171/mutualistic-damselfish-induce-higher-photosynthetic-rates-in-their-host-coral
#6
Nur Garcia-Herrera, Sebastian C A Ferse, Andreas Kunzmann, Amatzia Genin
Coral reefs are amongst the most diverse ecosystems on Earth where complex inter-specific interactions are ubiquitous. An example of such interactions is the mutualistic relationship between damselfishes and branching corals in the Northern Red Sea, where the fish use corals as shelter and provide them with nutrients, enhance the flow between their branches, and protect them from predators. By enhancing the flow between the coral branches, the fish ventilate the coral's inner zone, mitigating hypoxic conditions that otherwise develop within that zone during the night...
May 15, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28515149/pyruvate-kinase-inhibits-proliferation-during-postnatal-cerebellar-neurogenesis-and-suppresses-medulloblastoma-formation
#7
Katherine Tech, Andrey P Tikunov, Hamza Farooq, A Sorana Morrissy, Jessica Meidinger, Taylor Fish, Sarah C Green, Hedi Liu, Yisu Li, Andrew J Mungall, Richard A Moore, Yussanne Ma, Steven Jm Jones, Marco A Marra, Matthew G Vander Heiden, Michael D Taylor, Jeffrey MacDonald, Timothy R Gershon
Aerobic glycolysis supports proliferation through unresolved mechanisms. We have previously shown that aerobic glycolysis is required for the regulated proliferation of cerebellar granule neuron progenitors (CGNPs), and for the growth of CGNP-derived medulloblastoma. Blocking the initiation of glycolysis via deletion of Hexokinase-2 (Hk2) disrupts CGNP proliferation and restricts medulloblastoma growth. Here, we assessed whether disrupting Pyruvate kinase-M (Pkm), an enzyme that acts in the terminal steps of glycolysis, would alter CGNP metabolism, proliferation and tumorigenesis...
May 17, 2017: Cancer Research
https://www.readbyqxmd.com/read/28510256/interregional-cytogenetic-comparisons-in-halichoeres-and-thalassoma-wrasses-labridae-of-coastal-and-insular-regions-of-the-southwestern-atlantic
#8
K D J Amorim, M B Cioffi, L A C Bertollo, R X Soares, L L Calado, A T Borges, G W W F Costa, W F Molina
The distribution patterns of marine biodiversity are complex, resulting from vicariant events and species dispersion, as well as local ecological and adaptive conditions. Furthermore, the wide geographic distribution of some species may be hindered by biogeographical barriers that can interfere in the gene flow. Cytogenetic analyses in marine fishes, especially those involving populations in small remote insular environments, remain scarce. In the Western Atlantic, species of wrasses from the genera Halichoeres and Thalassoma occur in biogeographic arrangements that make it possible to analyze cytogenetic patterns between coastal and widely separated island populations...
May 10, 2017: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/28503173/microbial-community-response-to-simulated-petroleum-seepage-in-caspian-sea-sediments
#9
Marion H Stagars, Sonakshi Mishra, Tina Treude, Rudolf Amann, Katrin Knittel
Anaerobic microbial hydrocarbon degradation is a major biogeochemical process at marine seeps. Here we studied the response of the microbial community to petroleum seepage simulated for 190 days in a sediment core from the Caspian Sea using a sediment-oil-flow-through (SOFT) system. Untreated (without simulated petroleum seepage) and SOFT sediment microbial communities shared 43% bacterial genus-level 16S rRNA-based operational taxonomic units (OTU0.945) but shared only 23% archaeal OTU0.945. The community differed significantly between sediment layers...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28501197/methylmercury-determination-in-seafood-by-photochemical-vapor-generation-capacitively-coupled-plasma-microtorch-optical-emission-spectrometry
#10
Eniko Covaci, Marin Senila, Michaela Ponta, Eugen Darvasi, Dorin Petreus, Maria Frentiu, Tiberiu Frentiu
A non-chromatographic method based on double liquid-liquid extraction and measurements by UV photochemical vapor generation capacitively coupled plasma microtorch optical emission spectrometry was developed and characterized for methylmercury determination in seafood. Samples were prepared following the procedure recommended in JRC Technical Report of European Commission formerly proposed for the determination of methylmercury in seafood by thermal decomposition atomic absorption spectrometry, namely confinement of Hg species in 47% HBr solution, extraction of CH3Hg(+) in toluene and back-extraction in 1% l-cysteine aqueous solution...
August 1, 2017: Talanta
https://www.readbyqxmd.com/read/28499169/two-novel-dinuclear-ellipsoid-ni-ii-and-co-ii-complexes-bridged-by-4-5-bis-pyrazol-1-yl-phthalic-acid-synthesis-structural-characterization-and-biological-evaluation
#11
Enjun Gao, Zhenzhen Qi, Yun Qu, Yuqing Ding, Yang Zhan, Na Sun, Shaozhong Zhang, Xue Qiu, Mingchang Zhu
Two novel complexes, [Ni2(L)2(H2O)3]·4(H2O) (1) and [Co2(L)2(H2O)3]·5(H2O) (2) [H2L = 4,5-bis(pyrazol-1-yl) phthalic acid] were synthesized and characterized by spectroscopy (IR, (1)H NMR), and elemental analysis. The structures for the complexes were determined by X-ray crystallography providing the dinuclear ellipsoid Ni(II) and Co(II) complexes bridged by 4,5-bis(pyrazol-1-yl)phthalic acid ligands with same coordination modes. The interaction capacity of the complexes with FS-DNA (fish sperm DNA) has been investigated by UV and fluorescence spectroscopy...
May 4, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28496950/development-of-flow-cytometry-fluorescent-in-situ-hybridization-flow-fish-method-for-detection-of-pml-rara-chromosomal-translocation-in-acute-promyelocytic-leukemia-cell-line
#12
Fatemeh Zahedipour, Reza Ranjbaran, Abbas Behzad Behbahani, Khalil Tavakol Afshari, Mohammad Ali Okhovat, Gholamhossein Tamadon, Sedigheh Sharifzadeh
BACKGROUND: Acute Promyelocytic Leukemia (APL) is a subclass of acute myeloid leukemia. The chromosomal aberration in 95% of APL cases is t(15; 17) (q22; q21), which prevents cell differentiation. Characterization of the underlying molecular lesion is valuable in determining optimal treatment strategy. The goal of this study was to develop a new and powerful Flow- FISH technique to detect the long isoform (L) of PML-RARa fusion transcript in NB4 cell line. METHODS: To achieve the best condition for fixation, two different fixatives including 2% paraformaldehyde and 75% ethanol were used...
April 2017: Avicenna Journal of Medical Biotechnology
https://www.readbyqxmd.com/read/28494284/evaluating-the-impact-of-irrigation-on-surface-water-groundwater-interaction-and-stream-temperature-in-an-agricultural-watershed
#13
Hedeff I Essaid, Rodney R Caldwell
Changes in groundwater discharge to streams caused by irrigation practices can influence stream temperature. Observations along two currently flood-irrigated reaches in the 640-square-kilometer upper Smith River watershed, an important agricultural and recreational fishing area in west-central Montana, showed a downstream temperature decrease resulting from groundwater discharge to the stream. A watershed-scale coupled surface water and groundwater flow model was used to examine changes in streamflow, groundwater discharge to the stream and stream temperature resulting from irrigation practices...
May 7, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28489201/water-temperature-body-mass-and-fasting-heat-production-of-pacu-piaractus-mesopotamicus
#14
Fredy A A Aguilar, Thaline M P DA Cruz, Gerson B Mourão, José Eurico P Cyrino
Knowledge on fasting heat production (HEf) of fish is key to develop bioenergetics models thus improving feeding management of farmed species. The core of knowledge on HEf of farmed, neotropical fish is scarce. This study assessed the effect of body mass and water temperature on standard metabolism and fasting heat production of pacu, Piaractus mesopotamicus, an omnivore, Neotropical fresh water characin important for farming and fisheries industries all through South American continent. An automated, intermittent flow respirometry system was used to measure standard metabolic rate (SMR) of pacu (17 - 1,050 g) at five water temperatures: 19, 23, 26, 29 and 33 °C...
April 27, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28488290/can-solid-phase-microextraction-replace-solvent-extraction-for-water-analysis-in-fish-bioconcentration-studies-with-highly-hydrophobic-organic-chemicals
#15
Leonard Böhm, Rolf-Alexander Düring, Hans-Jörg Bruckert, Christian Schlechtriem
With regard to a refinement of water analysis in fish bioconcentration studies, automated solidy-phase microextraction (SPME) was used as alternative approach to conventional solvent extraction (liquid-liquid extraction, LLE) for the extraction of 3 hydrophobic organic chemicals (HOCs) (log KOW 5.5-7.8) from flow-through studies with rainbow trout (Oncorhynchus mykiss). Results proved that total concentrations extracted by SPME combined with internal standards and LLE are equal. Results further verify the possibility for a simultaneous extraction of total and freely dissolved HOC concentrations by SPME...
May 10, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28487787/ebv-negative-monomorphic-b-cell-posttransplant-lymphoproliferative-disorder-with-marked-morphologic-pleomorphism-and-pathogenic-mutations-in-asxl1-bcor-cdkn2a-nf1-and-tp53
#16
Agata M Bogusz
Posttransplant lymphoproliferative disorders (PTLDs) are a diverse group of lymphoid or plasmacytic proliferations frequently driven by Epstein-Barr virus (EBV). EBV-negative PTLDs appear to represent a distinct entity. This report describes an unusual case of a 33-year-old woman that developed a monomorphic EBV-negative PTLD consistent with diffuse large B-cell lymphoma (DLBCL) 13 years after heart-lung transplant. Histological examination revealed marked pleomorphism of the malignant cells including nodular areas reminiscent of classical Hodgkin lymphoma (cHL) with abundant large, bizarre Hodgkin-like cells...
2017: Case Reports in Hematology
https://www.readbyqxmd.com/read/28484228/genomic-evidence-for-local-adaptation-in-the-ovoviviparous-marine-fish-sebastiscus-marmoratus-with-a-background-of-population-homogeneity
#17
Shengyong Xu, Na Song, Linlin Zhao, Shanshan Cai, Zhiqiang Han, Tianxiang Gao
Advances in next-generation sequencing techniques have allowed for the generation of genome-wide sequence data, to gain insight into the dynamics influencing genetic structure and the local adaptation of marine fish. Here, using genotyping-by-sequencing (GBS) technique, we identified 31,119 single nucleotide polymorphisms (SNPs) for Sebastiscus marmoratus in 59 individuals from three populations in Chinese coastal waters. Based on all SNPs, there was little evidence of genetic differentiation among populations...
May 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28481399/analysis-of-genetic-diversity-of-leuciscus-leuciscus-baicalensis-using-novel-microsatellite-markers-with-cross-species-transferability
#18
D J Lei, G Zhao, P Xie, Y Li, H Yuan, M Zou, J G Niu, X F Ma
We used next-generation sequencing technology to characterize 19 genomic simple sequence repeat (SSR) markers and 11 expressed sequence tag (EST) SSR markers from Leuciscus leuciscus baicalensis, a small freshwater fish that is widely distributed in Xinjiang, China. Primers were used to test for polymorphisms in three L. leuciscus baicalensis populations in Xinjiang. There were 4-27 (average 11.3) alleles (NA), the expected heterozygosity (HE) was 0.36-0.94 (average 0.75 ± 0.14), the observed heterozygosity (HO) was 0...
May 4, 2017: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/28481218/propulsive-performance-of-an-under-actuated-robotic-ribbon-fin
#19
Hanlin Liu, Oscar Curet
Many aquatic animals propelled by elongated undulatory fins can perform complex maneuvers and swim with high efficiency at low speeds. In this type of swimming, one or multiple waves travel along the flexible fin that is composed of fin rays (for bony fish) interconnected with an elastic membrane. In this work, we explore the potential benefits or disadvantages of using passive fin motion based on the coupling of fluid-structure interaction and the elasto-mechanical responses of the undulatory fin. The motivation of this work is to understand how an under-actuated undulating fin can modify its active and passive fin motion to effectively control the hydrodynamic forces and propulsive efficiency...
May 8, 2017: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/28480549/small-larvae-in-large-rivers-observations-on-downstream-movement-of-european-grayling-thymallus-thymallus-during-early-life-stages
#20
C H A Van Leeuwen, T Dokk, T O Haugen, P M Kiffney, J Museth
Behaviour of early life stages of the salmonid European grayling Thymallus thymallus was investigated by assessing the timing of larval downstream movement from spawning areas, the depth at which larvae moved and the distribution of juvenile fish during summer in two large connected river systems in Norway. Trapping of larvae moving downstream and electrofishing surveys revealed that T. thymallus larvae emerging from the spawning gravel moved downstream predominantly during the night, despite light levels sufficient for orientation in the high-latitude study area...
May 7, 2017: Journal of Fish Biology
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