bluuebunny/crossref_metadata_2025_split huggingface dataset:
BROWN-HARLEQUIN BUG (Halyomorpha halys Stål.)
Authors: Skrypnyk N. 
Published: September 2019

Goal. To identify the main ways of getting into the country of invasive species brown marble bug Halyomorpha halys Stål.
Methods. Analytical study of information messages to the European and Mediterranean organization of plant protection (of ESR) and data of phytosanitary services of the EU, literary and Internet resources.
Results. Provides information on new economically important species Halyomorpha halys Stål., which is rapidly spreading in Europe. In Ukraine, the marble bug has the status of a quarantine, but there is a risk of further spread. His first appearance on the territory of our country has registered in 2018 Threat of invasive species, a polyphage, which causes significant damage to agricultural, forest and decorative cultures. Pest can cause damage to fruit, berry crops, vineyards, beans, soy, corn, and weeds. The list of host plants includes over 300 species of plants from 49 families, however, the preference for Halyomorpha halys gives the members of the family Rosacea. Danger of falling of the pest in Ukraine of the European countries of planting material, plant products, wood packaging materials, Luggage etc. The absence of natural enemies promotes the active dispersal of the pest. The focus should be directed on the study of natural brown marble bug. The rapid spread of Halyomorpha halys in the EU countries is of great concern to scientists. The experience of foreign scientists shows that effectively regulates its abundance parasitoid Trissolcus japonicas (Ashmead) and entomoparasitic fungus Beauveria bassiana.
Conclusions. There is an active resettlement of the pest in Europe. There is a risk of introduction and spread of the species Halyomorpha halys Stål, is a threat to the country.
VINOS BURYANAMI COMPANY NPK FOR DIFFERENT HUSBAND OF PLANTS OF PROCEED PRTROPODYBNOGO
Authors: Naydenko V. , Moshkivska S. 
Published: September 2019

Goal. To establish the factors of negative influence of weeds on plants of culture in the process of their joint vegetation. Task: to determine volumes of absorption of compounds of mineral nutrition by weeds.
Methods. Common and special methods: Field - study of the influence of conditions of cultivation and agro measures on productivity indicators of millet; laboratory - definition of quantitative and qualitative characteristics; statistical - the establishment of mathematical models and statistical dependencies between the investigated factors and processes.
Results On average, over the years of research, weed plants yielded 95 kg / ha of nitrogen for the density of crops of millet, 50 pct/m2, and the increase in the density of cultivated plants to 100-150 pct/m2 contributed to reducing the removal to 45-32 kg/ha . At the same time, the minimum indices of nitrogen weeds planting on the wheat grassland crops were 200 pct/m2 - 24 kg/ha, respectively. The removal of phosphorus at the density of crops of millet crops of 50 pct/m2 was 57,7 kg/ha of phosphorus, and from an increase in the density of cultivated plants to 100-150 pct/m2, the reduction of the removal was reduced to 27.8-19.9 kg/ha. At the same time, the minimum indices of removal of phosphorous weeds by plants on the crops of millet were the density of 200 pct/m2 - 14.4 kg/ha, respectively.
Conclusion. The conducted studies allowed to determine that, on average, over the years, weeds of plants per hundred cubic meters of poppy-stalks produced 109 kg/hectare of potassium, while increasing the density of crops to 100-150 pct/m2 contributed to a decrease in take-off to 51.8 -37.1 kg / ha. At the same time, the minimum parameters of the removal of potassium weeds by plants on millet crops were 200 pct/m2 - 27.2 kg/ha respectively
Influence of pollinators and growth regulators on the development of potato alternaria in the conditions of the Polissya of Ukraine
Authors: Bomоk S. 
Published: September 2019

Goal. Evaluate the effectiveness of different schemes with the use of isolates and growth promoters separately and in a mixture on different potato varieties on an artificial infectious background of Alternaria spр.
Methods. Field research, small-town. Monitoring the development of alternaria in the vegetative period of potato plants, and the main diseases of the tubers – during the storage of the crop, in accordance with generally accepted methods. The studied varieties – foreign selection (Carlene, Gala and Riviera). The scheme of the experiment included 9 options: 1- control; 2- Poteitin; 3- Simpto; 4. Masterpiece; 5- Ass-Selective; 6th Masterpiece + Simpto; 7- Masterpiece + Poteitin; 8- Ass-Selective + Simpto; 9- Ac-Selective + Poteitin.
Results. During the years of research, the varieties of Gal and Riviera were less affected by alternatives than the Carlene variety. It was established that the treatment of potato tubers before planting under the combination of the preparations Ac-Selectiv + Simpto increased resistance to alternaria and had a positive effect on all investigated varieties of potatoes, the disease developed from 5,1 to 5,6%, and the distribution from 20,6 to 30,2%.
It was found that potato tubers of the Galа and Riviera varieties in all investigated variants during the harvest were affected by fusariosis (the disease developed from 1,86 to 3,24%) and parasley common (the disease developed from 0,94 to 3,24%).
Potato varieties of Carlena variety were affected by fusariosis, common scab, rhizotoniosis and alternaria. Diseases of Fusariosis and Alternaria have affected tubers in all treatments and controls. The defeat of tubers with fusariosis was 1,88 to 3,24%. The defeat of parasites was from 0,91 to 1,64%. Defeat of tubers by diseases of rhizoctoniosis and alternaria was observed in the variants of the experiment: control, Poteitin, Simpto, Masterpiece and Ass-Selective. Defeat by rhizotoniosis was in the range from 0.50 to 0,90%, alternatively – from 0,50 to 1,0%. The same chemists in combination with growth regulators appeared to be more effective for the Carlene variety, and there were no rhizoctoniosis and alternariae.
Conclusions. The effectiveness of the action against Alternaria spр.. on plants of three varieties and fusariosis, the first common, rhizoctoniosis and alternaria on potato tubers. Continuation of research in 2019 will determine the most effective options for potato processing, which will ensure the high efficiency of protecting plant potato from illness.
Influence of fungicide compositions on efficiency of Fusarium species control and winter wheat productivity
Authors: Schwartau V. , Mykhalska L. , Zozulya O. , Sanin O. 
Published: September 2019

Goal. To determine the effectiveness of promising fungicide compositions for controlling the pathogens of fusariosis in seed treatment and their effect on the productivity of winter wheat.
Methods. Field, against the background of artificial infection Fusarium spp. The preparations were used in the treatment of winter wheat seeds of the Smuglyanka variety (BBCH 00) before sowing, and also during the flowering period — VVSN51. Statistical processing of research results was performed by analysis of variance using Excel.
Results. For prolonged protection of the zone of the root system of seedlings of plants, the effectiveness of treating compositions was studied, which include components with a low level of metabolism and apical transport, as well as fungicidal treating agents — derivatives of the class of triazoles, imidazoles, benzimidazoles, second-generation succinate dehydrogenase inhibitors and phenylpyrroles with insecticidal protectants. It has been established that for seed treatment, the use of fludioxonil-based preparations is effective. The level of control of Fusarium pathogens increased with the introduction of a composition of fludioxonil with sedaxan and insecticidal components. Tebuconazole and compositions of tebuconazole with prothioconazole and diphenoconazole are effective for controlling spike fusarium.
Conclusions. The most reliable protection of crops from Fusarium infections is the formation of agrophytocenosis with a low level of infectious background due to the reduction in the rotation of the areas of donor crops Fusarium spp. Minimization of soil cultivation contributes to the spread of pathogens of Fusarium. The key elements for obtaining healthy sowing are the introduction of cultivar-resistant varieties and hybrids resistant to Fusarium spp. And the use of highly effective fungicides and their compositions, including succinate dehydrogenase inhibitors, with insecticides during the growing season.
Three Red Suns in the Sky: A Transiting, Terrestrial Planet in a Triple M-dwarf System at 6.9 pc
Authors: Winters Jennifer G. , Medina Amber A. , Irwin Jonathan M. , Charbonneau David , Astudillo-Defru Nicola , Horch Elliott P. , Eastman Jason D. , Vrijmoet Eliot Halley , Henry Todd J. , Diamond-Lowe Hannah , Winston Elaine , Barclay Thomas , Bonfils Xavier , Ricker George R. , Vanderspek Roland , Latham David W. , Seager Sara , Winn Joshua N. , Jenkins Jon M. , Udry Stéphane , Twicken Joseph D. , Teske Johanna K. , Tenenbaum Peter , Pepe Francesco , Murgas Felipe , Muirhead Philip S. , Mink Jessica , Lovis Christophe , Levine Alan M. , Lépine Sébastien , Jao Wei-Chun , Henze Christopher E. , Furész Gábor , Forveille Thierry , Figueira Pedro , Esquerdo Gilbert A. , Dressing Courtney D. , Díaz Rodrigo F. , Delfosse Xavier , Burke Christopher J. , Bouchy François , Berlind Perry , Almenara Jose-Manuel 
Published: September 2019

Abstract
We present the discovery from Transiting Exoplanet Survey Satellite (TESS) data of LTT 1445Ab. At a distance of 6.9 pc, it is the second nearest transiting exoplanet system found to date, and the closest one known for which the primary is an M dwarf. The host stellar system consists of three mid-to-late M dwarfs in a hierarchical configuration, which are blended in one TESS pixel. We use MEarth data and results from the Science Processing Operations Center data validation report to determine that the planet transits the primary star in the system. The planet has a radius of

, an orbital period of

days, and an equilibrium temperature of

K. With radial velocities from the High Accuracy Radial Velocity Planet Searcher, we place a 3σ upper mass limit of 8.4

on the planet. LTT 1445Ab provides one of the best opportunities to date for the spectroscopic study of the atmosphere of a terrestrial world. We also present a detailed characterization of the host stellar system. We use high-resolution spectroscopy and imaging to rule out the presence of any other close stellar or brown dwarf companions. Nineteen years of photometric monitoring of A and BC indicate a moderate amount of variability, in agreement with that observed in the TESS light-curve data. We derive a preliminary astrometric orbit for the BC pair that reveals an edge-on and eccentric configuration. The presence of a transiting planet in this system hints that the entire system may be co-planar, implying that the system may have formed from the early fragmentation of an individual protostellar core.
Single-lined Spectroscopic Binary Star Candidates from a Combination of the RAVE and Gaia DR2 Surveys
Authors: Birko Danijela , Zwitter Tomaž , Grebel Eva K. , Parker Quentin A , Kordopatis Georges , Bland-Hawthorn Joss , Freeman Kenneth , Guiglion Guillaume , Gibson Brad K. , Navarro Julio , Reid Warren , Seabroke G. M. , Steinmetz Matthias , Watson Fred 
Published: September 2019

Abstract
The combination of the final version of the Radial Velocity Experiment (RAVE) spectroscopic survey data release 6 with radial velocities (RVs) and astrometry from Gaia DR2 allows us to identify and create a catalog of single-lined binary star candidates (SB1), their inferred orbital parameters, and to inspect possible double-lined binary stars (SB2). A probability function for the detection of RV variations is used for identifying SB1 candidates. The estimation of orbital parameters for main-sequence dwarfs is performed by matching the measured RVs with theoretical velocity curves sampling the orbital parameter space. The method is verified by studying a mock sample from the SB 9 catalog. Studying the boxiness and asymmetry of the spectral lines allows us to identify possible SB2 candidates, while matching their spectra to a synthetic library indicates probable properties of their components. From the RAVE catalog we select 37,664 stars with multiple RV measurements and identify 3838 stars as SB1 candidates. Joining Rave and Gaia DR2 yields 450,646 stars with RVs measured by both surveys and 27,716 of them turn out to be SB1 candidates, which is an increase by an order of magnitude over previous studies. For main-sequence dwarf candidates we calculate their most probable orbital parameters: orbital periods are not longer than a few years and primary components have masses similar to the solar mass. All our results are available in the electronic version.
Mutual Neutralization in Li+−D− Collisions: A Combined Experimental and Theoretical Study
Authors: Launoy Thibaut , Loreau Jérôme , Dochain Arnaud , Liévin Jacques , Vaeck Nathalie , Urbain Xavier 
Published: September 2019

Abstract
We present a combined experimental and theoretical study of the mutual neutralization (MN) process in collisions of lithium ions (Li+) with deuterium anions (D−) at collision energies below 1 eV. We employ a merged-beam apparatus to determine total and state-to-state MN cross sections. We perform nuclear dynamics calculations using the multichannel Landau–Zener model based on accurate ab initio molecular data. We obtain an excellent agreement between the experimental and theoretical results over the energy range covered in this work. We show that the basis sets used in the ab initio calculations have a limited influence on the total cross section, but strongly impacts the results obtained for the partial cross sections or the reaction branching ratios. This demonstrates the important role of high-precision measurements to validate the theoretical approaches used to study gas-phase reactive processes. Finally, we compute MN rate coefficients for Li+ + H− and Li+ + D−, and discuss their significance for astrochemistry models.
High-resolution Optical Spectroscopy of Stars in the Sylgr Stellar Stream*
Authors: Roederer Ian U. , Gnedin Oleg Y. 
Published: September 2019

Abstract
We observe two metal-poor main-sequence stars that are members of the recently discovered Sylgr stellar stream. We present radial velocities, stellar parameters, and abundances for 13 elements derived from high-resolution optical spectra collected using the Magellan Inamori Kyocera Echelle spectrograph. The two stars have identical compositions (within 0.13 dex or 1.2σ) among all elements detected. Both stars are very metal-poor ([Fe/H] = −2.92 ± 0.06). Neither star is highly enhanced in C ([C/Fe] < +1.0). Both stars are enhanced in the α elements Mg, Si, and Ca ([α/Fe] = +0.32 ± 0.06), and the ratios among Na, Al, and all Fe-group elements are typical for other stars in the halo and ultra-faint and dwarf spheroidal galaxies at this metallicity. Sr is mildly enhanced ([Sr/Fe] = +0.22 ± 0.11), but Ba is not enhanced ([Ba/Fe] < −0.4), indicating that these stars do not contain high levels of neutron-capture elements. The Li abundances match those found in metal-poor unevolved field stars and globular clusters (GCs) (log ϵ(Li) = 2.05 ± 0.07), which implies that environment is not a dominant factor in determining the Li content of metal-poor stars. The chemical compositions of these two stars cannot distinguish whether the progenitor of the Sylgr stream was a dwarf galaxy or a GC. If the progenitor was a dwarf galaxy, the stream may originate from a dense region such as a nuclear star cluster. If the progenitor was a GC, it would be the most metal-poor GC known.
Resolved and Integrated Stellar Masses in the SDSS-iv/MaNGA Survey. I. PCA Spectral Fitting and Stellar Mass-to-light Ratio Estimates
Authors: Pace Zachary J. , Tremonti Christy , Chen Yanmei , Schaefer Adam L. , Bershady Matthew A. , Westfall Kyle B. , Boquien Médéric , Rowlands Kate , Andrews Brett , Brownstein Joel R. , Drory Niv , Wake David 
Published: September 2019

Abstract
We present a method of fitting optical spectra of galaxies using a basis set of six vectors obtained from principal-component analysis of a library of synthetic spectra of 40,000 star formation histories (SFHs). Using this library, we provide estimates of the resolved effective stellar mass-to-light ratio (

) for thousands of galaxies from the SDSS-IV/MaNGA integral-field spectroscopic survey. Using a testing framework built on additional synthetic SFHs, we show that the estimates of

are reliable (as are their uncertainties) at a variety of signal-to-noise ratios, stellar metallicities, and dust attenuation conditions. Finally, we describe the future release of the resolved stellar mass-to-light ratios as an SDSS-IV/MaNGA Value-Added Catalog and provide a link to the software used to conduct this analysis. (The software can be found at https://github.com/zpace/pcay.)
Resolved and Integrated Stellar Masses in the SDSS-IV/MaNGA Survey. II. Applications of PCA-based Stellar Mass Estimates
Authors: Pace Zachary J. , Tremonti Christy , Chen Yanmei , Schaefer Adam L. , Bershady Matthew A. , Westfall Kyle B. , Boquien Médéric , Rowlands Kate , Andrews Brett , Brownstein Joel R. , Drory Niv , Wake David 
Published: September 2019

Abstract
A galaxy’s stellar mass is one of its most fundamental properties, but it remains challenging to measure reliably. With the advent of very large optical spectroscopic surveys, efficient methods that can make use of low signal-to-noise spectra are needed. With this in mind, we created a new software package for estimating effective stellar mass-to-light ratios

that uses a principal component analysis (PCA) basis set to optimize the comparison between observed spectra and a large library of stellar population synthesis models. In Paper I, we showed that with a set of six PCA basis vectors we could faithfully represent most optical spectra from the Mapping Nearby Galaxies at APO (MaNGA) survey, and we tested the accuracy of our M/L estimates using synthetic spectra. Here, we explore sources of systematic error in our mass measurements by comparing our new measurements to data from the literature. We compare our stellar mass surface density estimates to kinematics-derived dynamical mass surface density measurements from the DiskMass Survey and find some tension between the two that could be resolved if the disk scale heights used in the kinematic analysis were overestimated by a factor of ∼1.5. We formulate an aperture-corrected stellar mass catalog for the MaNGA survey, and compare to previous stellar mass estimates based on multiband optical photometry, finding typical discrepancies of 0.1 dex. Using the spatially resolved MaNGA data, we evaluate the impact of estimating total stellar masses from spatially unresolved spectra, and we explore how the biases that result from unresolved spectra depend upon the galaxy’s dust extinction and star formation rate. Finally, we describe an SDSS Value-Added Catalog that will include both spatially resolved and total (aperture-corrected) stellar masses for MaNGA galaxies.
Evidence for Inside-out Galaxy Growth and Quenching of a z ∼ 2 Compact Galaxy From High-resolution Molecular Gas Imaging
Authors: Spilker Justin S. , Bezanson Rachel , Weiner Benjamin J. , Whitaker Katherine E. , Williams Christina C. 
Published: September 2019

Abstract
We present high spatial resolution imaging of the CO(1–0) line from the Karl G. Jansky Very Large Array of COSMOS 27289, a massive, compact star-forming galaxy (SFG) at z = 2.234. This galaxy was selected because of its structural similarity to z ∼ 2 passive galaxies. Our previous observations showed that it is very gas poor with respect to typical SFGs at these redshifts, consistent with a rapid transition to quiescence as the molecular gas is depleted. The new data show that both the molecular gas fraction,

, and the molecular gas depletion time,

/SFR, are lower in the central 1–2 kpc of the galaxy and rise at larger radii ∼2–4 kpc. These observations are consistent with a scenario in which COSMOS 27289 will imminently cease star formation in the inner regions before the outskirts, i.e., inside-out quenching, the first time this phenomenon has been seen via observations of molecular gas in the high-redshift universe. We find good qualitative and quantitative agreement with a hydrodynamical simulation of galaxy quenching, in which the central suppression of molecular gas arises due to rapid gas consumption and outflows that evacuate the central regions of gas. Our results provide independent evidence for inside-out quenching of star formation as a plausible formation mechanism for z ∼ 2 quiescent galaxies.
Relationship between the Metallicity of the Circumgalactic Medium and Galaxy Orientation
Authors: Pointon Stephanie K. , Kacprzak Glenn G. , Nielsen Nikole M. , Muzahid Sowgat , Murphy Michael T. , Churchill Christopher W. , Charlton Jane C. 
Published: September 2019

Abstract
We investigate the geometric distribution of gas metallicities in the circumgalactic medium (CGM) around 47, z < 0.7 galaxies from the “Multiphase Galaxy Halos” Survey. Using a combination of quasar spectra from Hubble Space Telescope (HST)/COS and from Keck/HIRES or Very Large Telescope/UVES, we measure column densities of, or determine limits on, CGM absorption lines. We then use a Markov Chain Monte Carlo approach with Cloudy to estimate the metallicity of cool (T ∼ 104 K) CGM gas. We also use HST images to determine host-galaxy inclination and quasar-galaxy azimuthal angles. Our sample spans a H i column density range of 13.8 cm−2 <

< 19.9 cm−2. We find (1) while the metallicity distribution appears bimodal, a Hartigan dip test cannot rule out a unimodal distribution (0.4σ). (2) CGM metallicities are independent of halo mass, spanning three orders of magnitude at a fixed halo mass. (3) The CGM metallicity does not depend on the galaxy azimuthal and inclination angles regardless of H i column density, impact parameter, and galaxy color. (4) The ionization parameter does not depend on azimuthal angle. We suggest that the partial Lyman limit metallicity bimodality is not driven by a spatial azimuthal bimodality. Our results are consistent with simulations where the CGM is complex and outflowing, accreting, and recycled gas are well-homogenized at z < 0.7. The presence of low-metallicity gas at all orientations suggests that cold streams of accreting filaments are not necessarily aligned with the galaxy plane at low redshifts or intergalactic transfer may dominate. Finally, our results support simulations showing that strong metal absorption can mask the presence of low-metallicity gas in integrated line-of-sight CGM metallicities.