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https://www.readbyqxmd.com/read/29031216/description-of-neoparamoeba-longipodia-n-sp-and-a-new-strain-of-neoparamoeba-aestuarina-page-1970-amoebozoa-dactylopodida-from-deep-sea-habitats
#1
Ekaterina Volkova, Alexander Kudryavtsev
Two strains of lobose amoebae have been isolated from the deep-sea bottom sediments of the Sea of Japan (3.6km deep) and Western Atlantic Ocean (5.1km deep). Amoebae of both strains have a dactylopodial mophotype, intracellular kinetoplastid symbiont (Perkinsela-like organism) and have no microscales on the cell surface. The morphology and molecular data of the Sea of Japan strain allow us to unambiguously identify it as Neoparamoeba aestuarina (Page, 1970). At the same time, the Atlantic strain is described as a new species Neoparamoeba longipodia as it differs from other species of the genus Neoparamoeba in morphology and gene sequence data...
September 21, 2017: European Journal of Protistology
https://www.readbyqxmd.com/read/29031105/effects-of-processing-parameters-on-the-inactivation-of-bacillus-cereus-spores-on-red-pepper-capsicum-annum-l-flakes-by-microwave-combined-cold-plasma-treatment
#2
Jung Eun Kim, Hyeon-Son Choi, Dong-Un Lee, Sea C Min
The efficacy of microwave-combined cold plasma treatment (MCPT) for inactivating Bacillus cereus spores contaminating red pepper (Capsicum annum L.) flakes was investigated. The effects of red pepper drying method, particle size, and water activity (aw) were also evaluated at two levels of microwave power (1700 and 2500W/cm(2)). The inactivation effect of MCPT was higher at higher microwave power. Spore reduction was more effective with vacuum-dried red pepper than far-infrared-dried flakes. A significantly higher level of spore reduction was observed with the red pepper sample with a smaller surface to volume ratio when one surface (exterior surface) was inoculated (p<0...
September 27, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/29031057/arsenic-speciation-in-fish-and-shellfish-from-the-north-sea-southern-bight-and-a%C3%A3-u-port-area-brazil-and-health-risks-related-to-seafood-consumption
#3
Yue Gao, Paulo Baisch, Nicolai Mirlean, Flavio Manoel Rodrigues da Silva Júnior, Nik Van Larebeke, Willy Baeyens, Martine Leermakers
In North Sea and Port Açu (Brazil) coastal areas, high arsenic (As) concentrations were observed in water, soil and sediments. Therefore, the impact of this contamination on fish and shellfish species bought from local fishermen was studied. Total As was assessed with ICP-OES (Brazil) and ICP-MS (North Sea) after microwave digestion. Toxic As was assessed with liquid chromatography-ICP-MS (Brazil) and hydride generation-atomic fluorescence spectrometry (North Sea). All analytical methods comply with Quality Assurance/Quality Control procedures...
October 7, 2017: Chemosphere
https://www.readbyqxmd.com/read/29031052/dispersibility-and-biotransformation-of-oils-with-different-properties-in-seawater
#4
Odd G Brakstad, Umer Farooq, Deni Ribicic, Roman Netzer
Dispersants are used to remove oils slicks from sea surfaces and to generate small oil-droplet dispersions, which may result in enhanced biodegradation of the oil. In this study, dispersibility and biodegradation of chemically dispersed oils with different physical-chemical properties (paraffinic, naphthenic and asphaltenic oils) were compared in natural temperate SW at 13 °C. All selected oils were chemically dispersible when well-known commercial dispersants were used. However, interfacial tension (IFT) studies of the dispersed oils showed different IFT properties of the oils at 13 °C, and also different leaching of the dispersants from oil droplet surfaces...
October 4, 2017: Chemosphere
https://www.readbyqxmd.com/read/29029191/evaluating-the-neolithic-expansion-at-both-shores-of-the-mediterranean-sea
#5
João Pimenta, Alexandra M Lopes, David Comas, António Amorim, Miguel Arenas
During the Neolithic, human populations underwent cultural and technological developments that led to an agricultural revolution. Although the population genetics and evolution of European Neolithic populations have been extensively studied, little is known regarding the Neolithic expansion in North Africa with respect to Europe. One could expect that the different environmental and geological conditions at both shores of the Mediterranean Sea could have led to contrasting expansions. In order to test this hypothesis, we compared the Neolithic expansion in Europe and North Africa accounting for possible migration between them through the Strait of Gibraltar...
September 26, 2017: Molecular Biology and Evolution
https://www.readbyqxmd.com/read/29029137/comparison-of-thaumarchaeotal-populations-from-four-deep-sea-basins
#6
Stephen M Techtman, Nagissa Mahmoudi, Kendall T Whitt, Maria Fernanda Campa, Julian L Fortney, Dominique C Joyner, Terry C Hazen
The nitrogen cycle in the marine environment is strongly affected by ammonia oxidizing Thaumarchaeota. In some marine settings Thaumarchaeotes can comprise a large % of the prokaryotic population. To better understand the biogeographic patterns of Thaumarchaeotes, we sought to investigate differences in their abundance and phylogenetic diversity between geographically distinct basins. Samples were collected from four marine basins (The Caspian Sea, the Great Australian Bight, and the Central and Eastern Mediterranean)...
October 3, 2017: FEMS Microbiology Ecology
https://www.readbyqxmd.com/read/29028409/high-prevalence-and-low-intensity-ichthyophonus-infections-in-pacific-halibut-hippoglossus-stenolepis
#7
Paul K Hershberger, Jacob L Gregg, Claude L Dykstra
Ichthyophonus occurred at high prevalence but low intensity in Pacific Halibut (Hippoglossus stenolepis) throughout the west coast of North America, ranging from coastal Oregon to the Bering Sea. Infection prevalence in adults was variable on spatial and temporal scales, with the lowest prevalence typically occurring on the edges of the geographic range and highest prevalence consistently occurring inside Prince William Sound, AK (58-77%). Additionally, intra-annual differences occurred at Albatross - Portlock, AK (71% versus 32% within 2012) and inter-annual differences occurred along coastal Oregon (50% versus 12% from 2012 to 2015)...
October 13, 2017: Journal of Aquatic Animal Health
https://www.readbyqxmd.com/read/29028333/profiling-and-quantification-of-regioisomeric-caffeoyl-glucoses-in-berry-fruits
#8
Maria Alexandra Patras, Nikolai Kuhnert, Rakesh Jaiswal, Gordon J McDougall
Based on a recently developed tandem MS based hierarchical scheme for the identification of regioisomeric caffeoyl glucoses, selected berry fruits were profiled for their caffeoyl glucose ester content. Fresh edible berries profiled included strawberries, raspberries, blueberries, blackberries, red and black currants, lingonberries, gooseberries, cranberries, juice of elderberries, goji berries, chokeberries, cranberries, açai berries, sea buckthorn berries, Montmorency sour cherries, and pomegranate were investigated...
October 13, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29027988/the-history-of-tree-and-shrub-taxa-on-bol-shoy-lyakhovsky-island-new-siberian-archipelago-since-the-last-interglacial-uncovered-by-sedimentary-ancient-dna-and-pollen-data
#9
Heike H Zimmermann, Elena Raschke, Laura S Epp, Kathleen R Stoof-Leichsenring, Lutz Schirrmeister, Georg Schwamborn, Ulrike Herzschuh
Ecosystem boundaries, such as the Arctic-Boreal treeline, are strongly coupled with climate and were spatially highly dynamic during past glacial-interglacial cycles. Only a few studies cover vegetation changes since the last interglacial, as most of the former landscapes are inundated and difficult to access. Using pollen analysis and sedimentary ancient DNA (sedaDNA) metabarcoding, we reveal vegetation changes on Bol'shoy Lyakhovsky Island since the last interglacial from permafrost sediments. Last interglacial samples depict high levels of floral diversity with the presence of trees (Larix, Picea, Populus) and shrubs (Alnus, Betula, Ribes, Cornus, Saliceae) on the currently treeless island...
October 13, 2017: Genes
https://www.readbyqxmd.com/read/29027681/the-drivers-of-sea-lice-management-policies-and-how-best-to-integrate-them-into-a-risk-management-strategy-an-ecosystem-approach-to-sea-lice-management
#10
D Jackson, O Moberg, E M Stenevik Djupevåg, F Kane, H Hareide
The control of sea lice infestations on cultivated Atlantic salmon is a major issue in many regions of the world. The numerous drivers which shape the priorities and objectives of the control strategies vary for different regions/jurisdictions. These range from the animal welfare and economic priorities of the producers, to the mitigation of any potential impacts on wild stocks. Veterinary ethics, environmental impacts of therapeutants, and impacts for organic certification of the produce are, amongst others, additional sets of factors which should be considered...
October 13, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/29027611/preparation-of-flexible-bone-tissue-scaffold-utilizing-sea-urchin-test-and-collagen
#11
Naga Vijaya Lakshmi Manchinasetty, Sho Oshima, Masanori Kikuchi
Gonads of sea urchin are consumed in Japan and some countries as food and most parts including its tests are discarded as marine wastes. Therefore, utilization of them as functional materials would reduce the waste as well as encourage Japanese fishery. In this study, magnesium containing calcite granules collected from sea urchin tests were hydrothermally phosphatized and the obtained granules were identified as approximately 82% in mass of magnesium containing β-tricalcium phosphate and 18% in mass of nonstoichiometric hydroxyapatite, i...
October 13, 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/29027378/why-is-african-swine-fever-still-present-in-sardinia
#12
C Jurado, E Fernández-Carrión, L Mur, S Rolesu, A Laddomada, J M Sánchez-Vizcaíno
African swine fever (ASF) is an infectious disease of swine that has been present in Sardinia since 1978. Soon after introduction of the disease, several control and eradication programmes were established with limited success. Some researchers attributed the persistence of the disease in central and eastern areas to certain socio-economic factors, the existence of some local and traditional farming practices (i.e., unregistered free-ranging pigs known as brado animals) and the high density of wild boar in the region...
October 12, 2017: Transboundary and Emerging Diseases
https://www.readbyqxmd.com/read/29027362/impact-of-extraction-methods-on-the-detectable-protein-complement-of-metaproteomic-analyses-of-marine-sediments
#13
Lars Wöhlbrand, Christoph Feenders, Jessica Nachbaur, Holger Freund, Bert Engelen, Heinz Wilkes, Hans-Jürgen Brumsack, Ralf Rabus
Metaproteomic analysis targets proteins, the catalytic entities in the habitat, thereby providing direct insights into the metabolic activity of the community studied. A major challenge still remaining for metaproteomics is the effective and comprehensive extraction of proteins from environmental samples, due to their high complexity with respect to organismic diversity and abundance range. Moreover, in certain habitats, the inherent matrix may interfere with protein extraction. In recent years, several studies reported different protein extraction methods for soils known for their complex geochemistry, but only two analyzed marine sediments that generally comprise different though similarly complex geochemistry...
October 13, 2017: Proteomics
https://www.readbyqxmd.com/read/29027088/redescription-of-philometra-filiformis-stossich-1896-nematoda-philometridae-a-gonad-infecting-parasite-of-the-common-pandora-pagellus-erythrinus-linnaeus-sparidae-in-the-mediterranean-sea-including-new-taxonomic-features-revealed-by-sem
#14
František Moravec, Nessrine Ghanmi, Amira Chaabane, Lamia Gargouri, Jean-Lou Justine
The insufficiently known nematode species Philometra filiformis (Stossich, 1896) (Philometridae) is redescribed based on light and scanning electron microscopical (SEM) examinations of specimens collected from the ovaries of the type-host, the common pandora Pagellus erythrinus (Linnaeus) (Perciformes, Sparidae), from off the Mediterranean coast of Tunisia. The male of this species was studied with SEM for the first time, which revealed some new, taxonomically important morphological features. The male posterior end has a caudal mound consisting of two lateral parts widely separated dorsally from each other, four pairs of small adanal papillae, a pair of large but moderately developed papillae located posterior to the cloacal aperture and a pair of small phasmids...
October 12, 2017: Systematic Parasitology
https://www.readbyqxmd.com/read/29026615/an-unusual-cutaneous-infection-caused-by-mycobacterium-marinum
#15
Federica Veronese, Elisa Zavattaro, Pamela Farinelli, Enrico Colombo, Paola Savoia
Introduction.Mycobacterium marinum is a non-tubercular mycobacterium residing in fresh or salt water (in tropical or temperate areas); it is a fish and human pathogen, and in immunocompromised patients can cause severe cutaneous and subcutaneous infections. Case presentation. A 46-year-old white man who underwent immunosuppressive therapy was admitted to our department in May 2016 for skin lesions previously diagnosed as 'unusual erysipelas'. We rejected the hypothesis of erysipelas, due to the clinical features, and our diagnostic hypotheses were oriented towards sporotrichosis, atypical mycobacteriosis, cutaneous tuberculosis and cutaneous sarcoidosis...
April 2017: JMM Case Reports
https://www.readbyqxmd.com/read/29026495/recombinant-production-and-affinity-purification-of-the-frac-pore-forming-toxin-using-hexa-his-tag-and-pet-expression-cassette
#16
Mehdi Imani, Hossein Zarei Jaliani, Mohammad Hassan Kheirandish, Mahnaz Azadpour
OBJECTIVES: A newly-introduced protein toxin from a sea anemone, namely fragaceatoxin C is a protein with molecular weight of 20 kDa and pore-forming capability against cell membranes has recently grasped great attentions for its function. In this study, its coding sequence cloned as a fusion protein with His-tag for simple production and rapid purification. MATERIALS AND METHODS: After PCR amplification using NcoI and HindIII-harboring primers, the gene fragment was cloned into pET-28a(+)...
April 2017: Iranian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/29026370/preliminary-molecular-characterization-of-a-proinflammatory-and-nociceptive-molecule-from-the-echinometra-lucunter-spines-extracts
#17
Juliana Mozer Sciani, Bianca Zychar, Luis Roberto Gonçalves, Renata Giorgi, Thiago Nogueira, Daniel Carvalho Pimenta
BACKGROUND: Sea urchins are animals commonly found on the Brazilian shoreline, being Echinometra lucunter the most abundant species. Accidents caused by E. lucunter have been reported as one of the most frequent in Brazil, and are characterized by intense pain and inflammation, consequence of spine puncture in the skin. In order to characterize such toxic effects, we isolated one molecule that caused inflammatory and nociceptive effects. METHODS: E. lucunter specimens were collected without gender distinction...
2017: Journal of Venomous Animals and Toxins Including Tropical Diseases
https://www.readbyqxmd.com/read/29024593/strongly-correlated-rafts-in-both-leaves-of-an-asymmetric-bilayer
#18
Michael Schick
I consider a model of a bilayer characterized by two order parameters, one in each leaf. That of the inner leaf represents the difference in mol fractions of lipids with large spontaneous curvature, phosphatidylethanolamine, (PE), and those with small spontaneous curvatures, phosphatidylcholine, (PC), and phosphatidylserine, (PS). Similarly the order parameter in the outer leaf represents the difference in mol fractions of lipids with small spontaneous curvature, PC, and large curvature, sphingomyelin, (SM)...
October 12, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/29024390/pollination-in-the-chilean-mediterranean-type-ecosystem-a-review-of-current-advances-and-pending-tasks
#19
REVIEW
R Medel, C González-Browne, F E Fontúrbel
We conducted a systematic review of the scientific literature published on plant-pollinator interactions, from both the plant and pollinator perspective, in the Chilean Mediterranean-type ecosystem (MTE hereafter). Our search identified 69 published papers on 235 native plant species from 62 families. Less than 7.9% of the flowering species inhabiting the Chilean Mediterranean have been studied, and most studies were restricted to only one locality and one reproductive season. The geographic location of the studies differed from a random pattern, showing two well-defined areas where most studies were conducted...
October 10, 2017: Plant Biology
https://www.readbyqxmd.com/read/29024366/tethyan-changes-shaped-aquatic-diversification
#20
Zhonge Hou, Shuqiang Li
The Tethys Ocean existed between the continents of Gondwana and Laurasia from the Triassic to the Pliocene. Analyses of multiple biogeographic and phylogenetic histories reveal that the subsequent breakup of the Tethys greatly influenced the distributions of many species. The ancestral Tethyan realm broke into five biogeographic provinces, including the present-day East Pacific, West Atlantic, East Atlantic, Mediterranean Sea, and Indo-West Pacific. Palaeogeographic maps illustrate the Mesozoic Atlantic opening, the Cenozoic closure of the Tethys, the Messinian Salinity Crisis, the mid-Miocene closure of the Central American Seaway, and Quaternary geological changes...
October 12, 2017: Biological Reviews of the Cambridge Philosophical Society
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