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https://www.readbyqxmd.com/read/28546650/samango-monkeys-cercopithecus-albogularis-labiatus-manage-risk-in-a-highly-seasonal-human-modified-landscape-in-amathole-mountains-south-africa
#1
Katarzyna Nowak, Kirsten Wimberger, Shane A Richards, Russell A Hill, Aliza le Roux
Wild species use habitats that vary in risk across space and time. This risk can derive from natural predators and also from direct and indirect human pressures. A starving forager will often take risks that a less hungry forager would not. At a highly seasonal and human-modified site, we predicted that arboreal samango monkeys (Cercopithecus albogularis labiatus) would show highly flexible, responsive, risk-sensitive foraging. We first determined how monkeys use horizontal and vertical space across seasons to evaluate if high-risk decisions (use of gardens and ground) changed with season, a proxy for starvation risk...
2017: International Journal of Primatology
https://www.readbyqxmd.com/read/28545300/a-large-gap-magnetic-topological-heterostructure-formed-by-subsurface-incorporation-of-a-ferromagnetic-layer
#2
Toru Hirahara, Sergey V Eremeev, Tetsuroh Shirasawa, Yuma Okuyama, Takayuki Kubo, Ryosuke Nakanishi, Ryota Akiyama, Akari Takayama, Tetsuya Hajiri, Shinichiro Ideta, Masaharu Matsunami, Kazuki Sumida, Koji Miyamoto, Yasumasa Takagi, Kiyohisa Tanaka, Taichi Okuda, Toshihiko Yokoyama, Shin-Ichi Kimura, Shuji Hasegawa, Evgueni V Chulkov
Inducing magnetism into topological insulators is intriguing for utilizing exotic phenomena such as the quantum anomalous Hall effect (QAHE) for technological applications. While most studies have focused on doping magnetic impurities to open a gap at the surface-state Dirac point, many undesirable effects have been reported to appear in some cases that makes it difficult to determine whether the gap opening is due to the time-reversal symmetry breaking or not. Furthermore, the realization of the QAHE has been limited to low temperatures...
May 26, 2017: Nano Letters
https://www.readbyqxmd.com/read/28545257/the-reactive-sulfur-species-concept-15-years-on
#3
REVIEW
Gregory I Giles, Muhammad Jawad Nasim, Wesam Ali, Claus Jacob
Fifteen years ago, in 2001, the concept of "Reactive Sulfur Species" or RSS was advocated as a working hypothesis. Since then various organic as well as inorganic RSS have attracted considerable interest and stimulated many new and often unexpected avenues in research and product development. During this time, it has become apparent that molecules with sulfur-containing functional groups are not just the passive "victims" of oxidative stress or simple conveyors of signals in cells, but can also be stressors in their own right, with pivotal roles in cellular function and homeostasis...
May 23, 2017: Antioxidants (Basel, Switzerland)
https://www.readbyqxmd.com/read/28541324/a-cold-atom-fermi-hubbard-antiferromagnet
#4
Anton Mazurenko, Christie S Chiu, Geoffrey Ji, Maxwell F Parsons, Márton Kanász-Nagy, Richard Schmidt, Fabian Grusdt, Eugene Demler, Daniel Greif, Markus Greiner
Exotic phenomena in systems with strongly correlated electrons emerge from the interplay between spin and motional degrees of freedom. For example, doping an antiferromagnet is expected to give rise to pseudogap states and high-temperature superconductors. Quantum simulation using ultracold fermions in optical lattices could help to answer open questions about the doped Hubbard Hamiltonian, and has recently been advanced by quantum gas microscopy. Here we report the realization of an antiferromagnet in a repulsively interacting Fermi gas on a two-dimensional square lattice of about 80 sites at a temperature of 0...
May 24, 2017: Nature
https://www.readbyqxmd.com/read/28540862/electronic-and-optical-properties-of-strained-graphene-and-other-strained-2d-materials-a-review
#5
Gerardo G Naumis, Salvador Barraza-Lopez, Maurice Oliva-Leyva, Humberto Terrones
This review presents the state of the art of strain and ripple-induced effects on the electronic and optical properties of graphene. It starts by providing the crystallographic description of mechanical deformations, as well as the diffraction pattern for different kinds of representative deformations fields. Then, the focus turns to the unique elastic properties of graphene, and to how strain is produced. Thereafter, various theoretical approaches used to study the electronic properties of strained graphene are examined, discussing the advantages of each...
May 25, 2017: Reports on Progress in Physics
https://www.readbyqxmd.com/read/28533898/reconstructing-a-herbivore-s-diet-using-a-novel-rbcl-dna-mini-barcode-for-plants
#6
David L Erickson, Elizabeth Reed, Padmini Ramachandran, Norman A Bourg, William J McShea, Andrea Ottesen
Next Generation Sequencing and the application of metagenomic analyses can be used to answer questions about animal diet choice and study the consequences of selective foraging by herbivores. The quantification of herbivore diet choice with respect to native versus exotic plant species is particularly relevant given concerns of invasive species establishment and their effects on ecosystems. While increased abundance of white-tailed deer (Odocoileus virginianus) appears to correlate with increased incidence of invasive plant species, data supporting a causal link is scarce...
May 2017: AoB Plants
https://www.readbyqxmd.com/read/28530227/spin-injection-and-helicity-control-of-surface-spin-photocurrent-in-a-three-dimensional-topological-insulator
#7
Y Q Huang, Y X Song, S M Wang, I A Buyanova, W M Chen
A three-dimensional (3D) topological insulator (TI) is a unique quantum phase of matter with exotic physical properties and promising spintronic applications. However, surface spin current in a common 3D TI remains difficult to control and the out-of-plane spin texture is largely unexplored. Here, by means of surface spin photocurrent in Bi2Te3 TI devices driven by circular polarized light, we identify the subtle effect of the spin texture of the topological surface state including the hexagonal warping term on the surface current...
May 22, 2017: Nature Communications
https://www.readbyqxmd.com/read/28526564/direct-detection-of-anaplasma-phagocytophilum-by-polymerase-chain-reaction-followed-by-electrospray-ionization-mass-spectrometry-from-human-blood
#8
Heimo Lagler, Nicole Harrison, Manuel Kussmann, Markus Obermüller, Heinz Burgmann, Athanasios Makristathis, Michael Ramharter
Bacterial pathogens not detectable in commercial blood culture assays constitute an important challenge for infectious disease physicians, in particular if clinical symptoms of the illness are unspecific. In this report Anaplasma phagocytophilum was detected directly from a peripheral blood sample of a febrile patient reporting a tick bite by a commercial system based on polymerase chain reaction followed by electrospray ionization mass spectrometry. Therefore, the diagnosis of human granulocytic anaplasmosis infection was established by this diagnostic methodology for the first time...
May 16, 2017: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/28525718/on-the-stability-of-the-parent-anion-of-the-potential-radiosensitizer-8-bromoadenine-formed-by-low-energy-3-ev-electron-attachment
#9
Robin Schürmann, Katrin Tanzer, Iwona Dabkowska, Stephan Paul Denifl, Ilko Bald
8-Bromoadenine (8BrA) is a potential DNA radiosensitizer for cancer radiation therapy due to its efficient interaction with low energy electrons (LEEs). LEEs are a short-living species generated during the radiation damage of DNA by high energy radiation as it is applied in cancer radiation therapy. Electron attachment to 8BrA in the gas phase results in a stable parent anion below 3 eV electron energy in addition to fragmentation products formed by resonant exocyclic bond cleavages. Density functional theory (DFT) calculations of the 8BrA- anion reveal an exotic bond between the bromine and the C8 atom with a bond length of 2...
May 19, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28521953/optimized-selection-of-liquid-chromatography-conditions-for-wide-range-analysis-of-natural-compounds
#10
Aurélie Periat, Davy Guillarme, Jean-Luc Veuthey, Julien Boccard, Sofia Moco, Denis Barron, Alexandre Grand-Guillaume Perrenoud
Plant secondary metabolites are an almost unlimited reservoir of potential bioactive compounds. In view of the wide chemical space covered by natural compounds, their comprehensive analysis requires multiple and complementary approaches. In this study, numerous chromatographic conditions were tested for the analysis of a set of 120 representative natural compounds covering a wide polarity range (18 log P units). The experiments were performed on 59 different conditions involving 29 RPLC and HILIC dedicated stationary phases, as well as more exotic mixed mode columns...
May 10, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28521387/structural-and-functional-recovery-of-macroinvertebrate-communities-and-leaf-litter-decomposition-after-a-marked-drought-does-vegetation-type-matter
#11
Silvia Monroy, Aingeru Martínez, Naiara López-Rojo, Ana Victoria Pérez-Calpe, Ana Basaguren, Jesús Pozo
Climate change and anthropogenic disturbances are expected to lead to more intense and frequent droughts, with potentially severe effects on structure and function of perennial temperate streams. However, more information is required on whether streams flowing through basins already affected by exotic plantations will respond to droughts in the same way as streams under native forests. The recolonisation dynamics of benthic macroinvertebrate communities and leaf litter decomposition rates were examined in nine streams of oceanic-temperate climate that differed in catchment vegetation (three streams draining native deciduous forest, three in pine plantations and three in eucalypt plantations) after a marked drought...
May 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28521101/creation-of-a-short-range-ordered-two-dimensional-electron-gas-channel-in-al2o3-in2o3-interfaces
#12
Sang Yeon Lee, Jinseo Kim, Ayoung Park, Jucheol Park, Hyungtak Seo
The tuning of electrical properties in oxides via surface and interfacial two-dimensional electron gas (2DEG) channels is of great interest, as they reveal the extraordinary transition from insulating or semiconducting characteristics to metallic conduction or superconductivity enabled by the ballistic transport of spatially confined electrons. However, realizing the practical aspects of this exotic phenomenon toward short-range ordered and air-stable 2DEG channels remains a great challenge. At the heterointerface formed after deposition of an Al2O3 layer on a nanocrystalline In2O3 layer, a dramatic improvement in carrier conduction equivalent to metallic conduction is obtained...
May 22, 2017: ACS Nano
https://www.readbyqxmd.com/read/28513283/molecular-characterisation-of-australian-isolates-of-puccinia-graminis-f-sp-tritici-supports-long-term-clonality-but-also-reveals-cryptic-genetic-variation
#13
Jianping Zhang, Peng Zhang, Haydar Karaoglu, Robert F Park
Long term surveys of pathogenicity in Puccinia graminis f. sp. tritici (Pgt) in Australia have implicated mutation as a major source of virulence, at times leading to the demise of stem rust resistant wheat cultivars and substantial yield losses. Since 1925, these surveys have identified at least four occasions on which exotic isolates of Pgt appeared in Australia, with each acting as a founding isolate that gave rise sequentially to derivative pathotypes via presumed single step mutation. The current study aimed to examine the relationship between virulence and molecular patterns using SSR markers on selected isolates of Pgt collected in Australia during a 52 year period in order to propose an evolutionary pathway...
May 17, 2017: Phytopathology
https://www.readbyqxmd.com/read/28511938/floating-marine-litter-as-a-raft-for-drifting-voyages-for-planes-minutus-crustacea-decapoda-grapsidae-and-liocarcinus-navigator-crustacea-decapoda-polybiidae
#14
P Tutman, K Kapiris, M Kirinčić, A Pallaoro
The Columbus crab Planes minutus and Arch-fronted swimming crab Liocarcinus navigator, within their distribution ranges in the Mediterranean, were found rafted on plastic macro-litter floating on the open south Adriatic. While P. minutus was recorded from inanimate flotsam outside of the Mediterranean, L. navigator is herein reported for the first time on floating marine litter. The role of floating litter as habitat or as a dispersal agent for marine invertebrates has received quite attention however, records of decapod crabs drifting on litter has been relatively sparse...
May 13, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28508059/experimental-evidence-of-hourglass-fermion-in-the-candidate-nonsymmorphic-topological-insulator-khgsb
#15
Junzhang Ma, Changjiang Yi, Baiqing Lv, ZhiJun Wang, Simin Nie, Le Wang, Lingyuan Kong, Yaobo Huang, Pierre Richard, Peng Zhang, Koichiro Yaji, Kenta Kuroda, Shik Shin, Hongming Weng, Bogdan Andrei Bernevig, Youguo Shi, Tian Qian, Hong Ding
Topological insulators (TIs) host novel states of quantum matter characterized by nontrivial conducting boundary states connecting valence and conduction bulk bands. All TIs discovered experimentally so far rely on either time-reversal or mirror crystal symmorphic symmetry to protect massless Dirac-like boundary states. Several materials were recently proposed to be TIs with nonsymmorphic symmetry, where a glide mirror protects exotic surface fermions with hourglass-shaped dispersion. However, an experimental confirmation of this new fermion is missing...
May 2017: Science Advances
https://www.readbyqxmd.com/read/28505857/ising-spin-glasses-in-two-dimensions-universality-and-nonuniversality
#16
P H Lundow, I A Campbell
Following numerous earlier studies, extensive simulations and analyses were made on the continuous interaction distribution Gaussian model and the discrete bimodal interaction distribution Ising spin glass (ISG) models in two dimensions [Lundow and Campbell, Phys. Rev. E 93, 022119 (2016)1539-375510.1103/PhysRevE.93.022119]. Here we further analyze the bimodal and Gaussian data together with data on two other continuous interaction distribution two-dimensional ISG models, the uniform and the Laplacian models, and three other discrete interaction distribution models, a diluted bimodal model, an "antidiluted" model, and a more exotic symmetric Poisson model...
April 2017: Physical Review. E
https://www.readbyqxmd.com/read/28504763/mirrors-with-designed-spherical-aberration-for-multi-pass-cavities
#17
Sarper Ozharar, Alphan Sennaroglu
We present a novel multi-pass cavity design based on the use of a rotationally symmetric end mirror having a specifically designed spherical aberration so that its focal length varies inversely as the ray height from the optical axis. We provide a detailed discussion of how ray tracing can be done for this system and show with numerical simulations that a very rich set of exotic spot patterns can be formed on the end mirrors. We further show a specific q-preserving configuration where the q-parameters of the input and output beams remain the same...
May 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28503294/a-survey-of-free-ranging-deer-in-ireland-for-serological-evidence-of-exposure-to-bovine-viral-diarrhoea-virus-bovine-herpes-virus-1-bluetongue-virus-and-schmallenberg-virus
#18
David A Graham, Clare Gallagher, Ruth F Carden, Jose-Maria Lozano, John Moriarty, Ronan O'Neill
BACKGROUND: Deer are an important wildlife species in both the Republic of Ireland and Northern Ireland having colonised most regions across the island of Ireland. In comparison to cattle and sheep which represent the main farmed ruminant species on the island, there is a lack of data concerning their exposure, as measured by the presence of antibodies, to important viral pathogens of ruminants. A study was therefore undertaken to investigate the seroprevalence of wild deer to four viruses, namely bovine viral diarrhoea virus (BVDV), bovine herpesvirus-1 (BoHV-1), Schmallenberg virus (SBV) and bluetongue virus (BTV)...
2017: Irish Veterinary Journal
https://www.readbyqxmd.com/read/28503198/dynamics-of-two-methanogenic-microbiomes-incubated-in-polycyclic-aromatic-hydrocarbons-naphthenic-acids-and-oil-field-produced-water
#19
Bonahis J Oko, Yu Tao, David C Stuckey
BACKGROUND: Oil field produced water (OFPW) is widely produced in large volumes around the world. Transforming the organic matter in OFPW into bioenergy, such as biomethane, is one promising way to sustainability. However, OFPW is difficult to biologically degrade because it contains complex compounds such as naphthenic acids (NAs), or polycyclic aromatic hydrocarbons (PAHs). Although active microbial communities have been found in many oil reservoirs, little is known about how an exotic microbiome, e...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28502455/seasonal-changes-in-stress-biomarkers-of-an-exotic-coastal-species-chaetopleura-angulata-polyplacophora-implications-for-biomonitoring
#20
Diana Madeira, Catarina Vinagre, Vanessa Mendonça, Mário Sousa Diniz
Knowledge on baseline values of stress biomarkers in natural conditions is urgent due to the need of reference values for monitoring purposes. Here we assessed the cellular stress response of the chiton Chaetopleura angulata in situ. Biomarkers commonly used in environmental monitoring (heat shock protein 70kDa, total ubiquitin, catalase, glutathione-S-transferase, superoxide-dismutase, lipid peroxidation) were analyzed in the digestive system, gills and muscle of C. angulata, under spring and summer conditions in order to assess seasonal tissue-specific responses...
May 10, 2017: Marine Pollution Bulletin
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