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https://www.readbyqxmd.com/read/28431210/exotic-gill-lice-species-copepoda-lernaeopodidae-salmincola-spp-infect-rainbow-trout-oncorhynchus-mykiss-and-brook-trout-salvelinus-fontinalis-in-the-southeastern-united-states
#1
Carlos F Ruiz, Jacob M Rash, Doug A Besler, Jackson R Roberts, Micah B Warren, Cova R Arias, Stephen A Bullard
Salmincola californiensis infected 25 of 31 (prevalence 0.8; intensity 2-35 [mean 6.6 ± standard deviation 7.7; n = 25]) rainbow trout, Oncorhynchus mykiss, from a private trout farm connected to the Watauga River, North Carolina. Salmincola edwardsii infected all of 9 (1.0; 2-43 [9.3 ± 13.0; 9]) brook trout, Salvelinus fontinalis, from Big Norton Prong, a tributary of the Little Tennessee River, North Carolina. Both lernaeopodids are well-known salmonid pathogens but neither is native to, nor has been previously taxonomically confirmed from, the southeastern United States...
April 21, 2017: Journal of Parasitology
https://www.readbyqxmd.com/read/28430465/elemental-topological-dirac-semimetal-%C3%AE-sn-on-insb-111
#2
Cai-Zhi Xu, Yang-Hao Chan, Yige Chen, Peng Chen, Xiaoxiong Wang, Catherine Dejoie, Man-Hong Wong, Joseph Andrew Hlevyack, Hyejin Ryu, Hae-Young Kee, Nobumichi Tamura, Mei-Yin Chou, Zahid Hussain, Sung-Kwan Mo, Tai-Chang Chiang
Three-dimensional (3D) topological Dirac semimetals (TDSs) are rare but important as a versatile platform for exploring exotic electronic properties and topological phase transitions. A quintessential feature of TDSs is 3D Dirac fermions associated with bulk electronic states near the Fermi level. Using angle-resolved photoemission spectroscopy, we have observed such bulk Dirac cones in epitaxially grown α-Sn films on InSb(111), the first such TDS system realized in an elemental form. First-principles calculations confirm that epitaxial strain is key to the formation of the TDS phase...
April 7, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28429807/prediction-of-a-new-bec-monolayer-with-perfectly-planar-tetracoordinate-carbons
#3
Chun-Sheng Liu, Hao-Hao Zhu, Xiao-Juan Ye, Xiao-Hong Yan
Recently, there has been a growing interest in exploring planar hypercoordinate carbons in two-dimensional nanostructures. However, atomic monolayers with ideal planar hypercoordinate carbon are quite rare due to the challenge in stabilizing the exotic motifs. We predicted a global minimum two-dimensional BeC monolayer using the global particle-swarm optimization method. Each carbon binds peripheral four atoms in the same plane, forming a perfectly planar tetracoordinate carbon moiety. The cohesive energy, phonon-spectrum and mechanical stability criteria confirm the stability of monolayer BeC...
April 21, 2017: Nanoscale
https://www.readbyqxmd.com/read/28422455/a-decade-of-a-leafminer-invasion-in-china-lessons-learned
#4
REVIEW
Yulin Gao, Stuart Reitz, Zhenlong Xing, Scott Ferguson, Zhongren Lei
Liriomyza trifolii (Burgess) is a highly invasive species that has become established in agricultural and ornamental crops throughout the world. L. trifolii was first recorded in China in 2005 in Guangdong Province. Subsequently, its known distribution in China has rapidly expanded to another 11 provinces (Zhejiang, Jiangsu, Shanghai, Fujian, Guangxi, Shandong, Hainan, Hebei, Henan, Hubei and Anhui), where it is currently causing considerable damage and economic losses. Experimental research and field surveys have contributed to our understanding of the ecology of L...
April 19, 2017: Pest Management Science
https://www.readbyqxmd.com/read/28421973/-bitten-by-an-exotic-venomous-snake
#5
M A Dijkman, I de Vries, M van Dam, D W de Lange
BACKGROUND: Patients who have been bitten by an exotic venomous snake are at risk of severe morbidity and a fatal outcome following an incorrect risk-assessment. Treatment with an antivenom can be necessary and can turn out to be lifesaving. In the Netherlands there are only a few cases of bites from exotic venomous snakes each year. CASE DESCRIPTION: A 28-year-old man presented at the emergency department (ED) after having been bitten by a monocled cobra (Naja kaouthia)...
2017: Nederlands Tijdschrift Voor Geneeskunde
https://www.readbyqxmd.com/read/28420420/distribution-of-ticks-infesting-ruminants-and-risk-factors-associated-with-high-tick-prevalence-in-livestock-farms-in-the-semi-arid-and-arid-agro-ecological-zones-of-pakistan
#6
Abdul Rehman, Ard M Nijhof, Carola Sauter-Louis, Birgit Schauer, Christoph Staubach, Franz J Conraths
BACKGROUND: Tick infestation is the major problem for animal health that causes substantial economic losses, particularly in tropical and subtropical countries. To better understand the spatial distribution of tick species and risk factors associated with tick prevalence in livestock in Pakistan, ticks were counted and collected from 471 animals, including 179 cattle, 194 buffaloes, 80 goats and 18 sheep, on 108 livestock farms in nine districts, covering both semi-arid and arid agro-ecological zones...
April 19, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28419678/secondary-compounds-from-exotic-tree-plantations-change-female-mating-preferences-in-the-palmate-newt-lissotriton-helveticus
#7
Maider Iglesias-Carrasco, Megan L Head, Michael D Jennions, Carlos Cabido
Selection can favor phenotypic plasticity in mate choice in response to environmental factors that alter the costs and benefits of being choosy, or of choosing specific mates. Human-induced environmental change could alter sexual selection by affecting the costs of mate choice, or by impairing the ability of individuals to identify preferred mates. For example, variation in mate choice could be driven by environmentally induced differences in body condition (e.g. health) that change the cost of choosiness, or by environmental effects on the ability to detect or discriminate sexual signals...
April 17, 2017: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/28419433/plant-soil-feedbacks-in-declining-forests-implications-for-species-coexistence
#8
Lorena Gómez-Aparicio, Jara Domínguez-Begines, Paul Kardol, José M Ávila, Beatriz Ibáñez, Luis V García
Plant-soil feedbacks (PSFs) play a relevant role as drivers of species abundance, coexistence, and succession in plant communities. However, the potential contribution of PSFs to community dynamics in changing forest ecosystems affected by global change drivers is still largely unexplored. We measured the direction, strength and nature (biological vs. chemical) of PSFs experienced by coexisting tree species in two types of declining Quercus suber forests of southwestern Spain (open woodland vs. closed forest) invaded by the exotic soil pathogen Phytophthora cinnamomi...
April 18, 2017: Ecology
https://www.readbyqxmd.com/read/28415211/dynamics-of-vortex-antivortex-pairs-and-rarefaction-pulses-in-liquid-light
#9
David Feijoo, Angel Paredes, Humberto Michinel
We present a numerical study of the cubic-quintic nonlinear Schrödinger equation in two transverse dimensions, relevant for the propagation of light in certain exotic media. A well-known feature of the model is the existence of flat-top bright solitons of fixed intensity, whose dynamics resembles the physics of a liquid. They support traveling wave solutions, consisting of rarefaction pulses and vortex-antivortex pairs. In this work, we demonstrate how the vortex-antivortex pairs can be generated in bright soliton collisions displaying destructive interference followed by a snake instability...
March 2017: Physical Review. E
https://www.readbyqxmd.com/read/28414779/seed-germination-in-relation-to-the-invasiveness-in-spiny-amaranth-and-edible-amaranth-in-xishuangbanna-sw-china
#10
Juan Ye, Bin Wen
Both spiny and edible amaranths (Amaranthus spinosus and A. tricolor) are exotic annuals in China that produce numerous small seeds every year. Spiny amaranth has become a successful invader and a troublesome weed in Xishuangbanna, but edible amaranth has not, although it is widely grown as a vegetable there. As seed germination is one of the most important life-stages contributing to the ability of a plant to become invasive, we conducted experiments to compare the effects of high temperature and water stress on seed germination in two varieties each of spiny amaranth and edible amaranth...
2017: PloS One
https://www.readbyqxmd.com/read/28412830/expression-and-immunogenicity-of-vp40-protein-of-zebov
#11
Yinbiao Wang, Xiao Liu, Ling Tao, Pengwei Xu, Xia Gao, Huijun Li, Zhongzhi Yang, Weidong Wu
BACKGROUND: EBOV outbreaks continue to threaten the world due to the absence of effective vaccines and therapeutics. Easy-to-use and rapid diagnostic tests for EBOV are highly desired for prevention and control of the EVD epidemic. METHODS: Escherichia coli expression system was used to express VP40 protein of Zaire Ebola virus (ZEBOV) as water-soluble protein upon optimization of temperature, time, and IPTG concentration. VP40 protein was purified through Ni-NTA affinity chromatography and applied to immunize rabbits for immunogenicity analysis...
April 2017: Archives of Iranian Medicine
https://www.readbyqxmd.com/read/28407936/optimization-of-the-recovery-of-high-value-compounds-from-pitaya-fruit-by-products-using-microwave-assisted-extraction
#12
Federico Ferreres, Clara Grosso, Angel Gil-Izquierdo, Patrícia Valentão, Ana T Mota, Paula B Andrade
A green microwave-assisted extraction of high value-added compounds from exotic fruits' peels was optimized by Box-Behnken design using 3 factors: solid/solvent ratio, X1, temperature, X2, and extraction time, X3. By using Derringer's desirability function, optimum extraction yields are obtained with X1=1/149.95g/mL, X2=72.27°C and X3=39.39min (white-fleshed red pitaya) and X1=1/148.96g/mL, X2=72.56°C and X3=5.02min (yellow pitaya) and a maximum betacyanin content is achieved with X1=1/150g/mL, X2=49.33°C and X3=5min...
September 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28401222/co-organizing-synthesis-of-heterogeneous-nanostructures-through-the-photo-cleavage-of-pre-stabilized-self-assemblies
#13
Wei Ji, Shijin Zhang, Georgy A Filonenko, Guanying Li, Toshio Sasaki, Chuanliang Feng, Ye Zhang
We devised a co-organizing synthesis by targeting metastable assemblies. Applying a photo-cleavage reaction to the pre-stabilized self-assembled nanostructures, we could successfully place physical constraints on the initiating stage of the molecular co-assembly (CA) process for exotic nanostructures that are away from the thermodynamic minima.
April 12, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28398440/assembly-of-trivalent-particles-under-confinement-from-an-exotic-solid-phase-to-a-liquid-phase-at-low-temperature
#14
Eva G Noya, Noé G Almarza, Enrique Lomba
Using computer simulations, we study the phase diagram of a two-dimensional system of disk particles with three patches distributed symmetrically along the particle equator. The geometry of the particles is compatible with a honey-comb lattice at moderately low temperature and pressure, whereas it is expected that the system forms a close-packed triangular lattice at high temperature and pressure. The effect of patch size within the single bond per patch regime was investigated, and it was found that the topology of the phase diagram changes drastically with patch size...
April 11, 2017: Soft Matter
https://www.readbyqxmd.com/read/28398041/pressure-induced-stable-beryllium-peroxide
#15
Shoutao Zhang, Fei Li, Haiyang Xu, Guochun Yang
Beryllium oxides, at ambient pressure, have been extensively studied due to their unique chemical bonds and applications. However, the long-desirable target beryllium peroxide (BeO2) has not been reported, thus far. Currently, the application of pressure has become a powerful tool in finding unusual stoichiometric compounds with exotic properties. Here, swarm structural searches in combination with first-principles calculations disclosed that the reaction of BeO and oxygen, at pressures above 89.6 GPa, yields BeO2...
April 11, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28397870/modes-coupling-analysis-of-surface-plasmon-polaritons-based-resonance-manipulation-in-infrared-metamaterial-absorber
#16
Guoshuai Zhen, Peiheng Zhou, Xiaojia Luo, Jianliang Xie, Longjiang Deng
Surface plasmon polaritons (SPPs) and standing wave modes provide interesting and exotic properties for infrared metamaterial absorbers. Coupling of these modes promises further development in this field but restricted by the complexity of modes analysis. In this work, we investigate the general phenomenon of modes coupling supported by a metal (with grating)-dielectric-metal sandwich structure based on rigorous coupled-wave analysis (RCWA) method and experiment results. Through the analysis of fundamental modes, a new approach based on the boundary conditions is introduced to reveal the coupling mechanism and the corresponding resonance shifting phenomenon with simple but rigorous derivations...
April 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28397781/measurement-of-the-cosmic-optical-background-using-the-long-range-reconnaissance-imager-on-new-horizons
#17
Michael Zemcov, Poppy Immel, Chi Nguyen, Asantha Cooray, Carey M Lisse, Andrew R Poppe
The cosmic optical background is an important observable that constrains energy production in stars and more exotic physical processes in the universe, and provides a crucial cosmological benchmark against which to judge theories of structure formation. Measurement of the absolute brightness of this background is complicated by local foregrounds like the Earth's atmosphere and sunlight reflected from local interplanetary dust, and large discrepancies in the inferred brightness of the optical background have resulted...
April 11, 2017: Nature Communications
https://www.readbyqxmd.com/read/28393274/chronic-n-enrichment-and-drought-alter-plant-cover-and-community-composition-in-a-mediterranean-type-semi-arid-shrubland
#18
George L Vourlitis
Anthropogenic nitrogen (N) deposition has caused a decline in native plant species and an increase in exotic plant species in many terrestrial ecosystems; however, vegetation change depends on the rate and/or duration of N input, individual species responses, interactions with other resources, and ecosystem properties such as species richness and canopy cover, soil texture, pH, and/or disturbance regime. Native shrub and exotic forb responses to N enrichment were evaluated over a 13-year field experiment in a mature coastal sage scrub (CSS) shrubland of southern California to test the hypothesis that dry-season N input will cause a decline in native shrubs and an increase in exotic annuals...
April 9, 2017: Oecologia
https://www.readbyqxmd.com/read/28391678/investigation-of-novel-triple-responsive-wormlike-micelles
#19
Mingwei Zhao, Mingwei Gao, Caili Dai, Chenwei Zou, Zhe Yang, Xuepeng Wu, Yifei Liu, Yining Wu, Sisi Fang, Wenjiao Lv
Smart wormlike micelles with stimuli-tunable rheological properties may be useful in a variety of applications, such as in molecular devices and sensors. The formation of triplestimuli-responsive systems so far has been a challenging and important issue. In this work, a novel triplestimuli (photo-, pH-, and thermoresponsive) wormlike micelle is constructed with N-cetyl-N-methylmorpholinium bromide and trans-cinnamic acid (CA). The corresponding multiresponsive behaviors of wormlike micellar system were revealed using cryogenic transmission electron microscopy, a rheometer, and (1)H NMR...
April 20, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28390018/soil-physicochemical-factors-as-environmental-filters-for-spontaneous-plant-colonization-of-abandoned-tailing-dumps
#20
Rosanna Ginocchio, Pedro León-Lobos, Eduardo Carlos Arellano, Vinka Anic, Juan Francisco Ovalle, Alan John Martin Baker
Abandoned tailing dumps (ATDs) offer an opportunity to identify the main physicochemical filters that determine colonization of vegetation in solid mine wastes. The current study determined the soil physicochemical factors that explain the compositional variation of pioneer vegetal species on ATDs from surrounding areas in semiarid Mediterranean-climate type ecosystems of north-central Chile (Coquimbo Region). Geobotanical surveys-including physicochemical parameters of substrates (0-20 cm depth), plant richness, and coverage of plant species-were performed on 73 ATDs and surrounding areas...
April 7, 2017: Environmental Science and Pollution Research International
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