bluuebunny/crossref_metadata_2025_split huggingface dataset:
Indicators of the antioxidant system in the long-term period after acute mercury nitrate poisoning in the experiment
Authors: Batotsyrenova E. G. , Vakunenkova O. A. , Zolotoverkhaya E. A. , Kashuro V. A. , Kostrova T. A. , Kubarskaya L. G. , Lapina N. V. , Shchepetkova K. M. 
Published: May 2020

The article presents experimental data on the state of the antioxidant system in red blood cells of white outbred rats 1 and 3 months after acute mercury nitrate poisoning with a semilethal dose. It has been established that this form of intoxication is accompanied by pronounced changes in the state of the antioxidant defense system in erythrocytes of poisoned animals (a decrease in the concentration of reduced glutathione, a decrease in the activity of superoxide dismutase and glutathione peroxidase, and an increase in the concentration of lipid peroxidation products).It has been shown that the mercury content in the blood of experimental animals remains elevated during the entire study period.The results obtained indicate the importance of impaired functioning of the antioxidant system in the implementation of long-term consequences of acute mercury poisoning. The reasons for the occurrence of these biochemical shifts and their role in the development of the long-term cytotoxic effects of mercury nitrate are discussed.
Economic Justice and Judicial Structure
Authors: Lalude Olalekan Moyosore , Fatehinse Ayodeji 
Published: May 2020

Economic justice is the expression of the effective distribution of economic goods. This could be realized through judicial mechanisms. Effective judicial systems are the platform on which economic justice can be actualized. There is a positive connection between economic justice and an effective judicial system, and this is usually measured by the rule of law and the level of its regard. The paper argued that one of the established dysfunctional characteristics of developing nations is the failure of their judicial system to deliver economic justice and the inability of the state to coordinate the integrity of its institutions. This paper employed a qualitative approach in its exploration of the issues. It engaged content analysis in the processing of the arguments it advanced. The paper argued that the resolution of economic justice and other institutional considerations could help in economic growth, especially in Nigeria. The paper concluded by suggesting that judicial structure must be strengthened in order to derive the capacity needed to realize economic justice in Nigeria.
Determination of Size, Albedo, and Thermal Inertia of 10 Vesta Family Asteroids with WISE/NEOWISE Observations
Authors: Jiang Haoxuan , Ji Jianghui , Yu Liangliang 
Published: May 2020

Abstract
In this work, we investigate the size, thermal inertia, surface roughness, and geometric albedo of 10 Vesta family asteroids using the Advanced Thermophysical Model, based on the thermal-infrared data acquired by mainly NASA’s Wide-field Infrared Survey Explorer. Here, we show that the average thermal inertia and geometric albedo of the investigated Vesta family members are 42 J m−2 s−1/2 K−1 and 0.314, respectively, where the derived effective diameters are less than 10 km. Moreover, the family members have a relatively low roughness fraction on their surfaces. The similarity in thermal inertia and geometric albedo among the V-type Vesta family members may reveal their close connection in origin and evolution. As the fragments of the cratering event of Vesta, the family members may have undergone a similar evolutionary process, thereby leading to very close thermal properties. Finally, we estimate their regolith grain sizes with different volume filling factors.
Molecular Gas and Dust Heating in Active Galaxies: Growing Black Holes or Tidal Shocks?
Authors: Minsley Rebecca , Petric Andreea , Lambrides Erini , Diamond-Stanic Aleksandar M. , Merhi Maya , Chiaberge Marco , Flagey Nicolas 
Published: May 2020

Abstract
We investigate if and how growing supermassive black holes (SMBH) known as active galactic nuclei (AGN) and gravitational interactions affect the warm molecular gas and dust of galaxies. Our analysis focuses on the morphologies and warm ISM properties of 630 galaxies at z < 0.1. We use grizy images from the Pan-STARRS survey to classify the galaxies into mergers, early mergers, and non-mergers. We use MIR spectroscopic measurements of emission from rotational H2 transitions, dust, and polycyclic aromatic hydrocarbon (PAH) features, and silicate emission or absorption lines at 9.7 μm to study how gravitational interactions impact the warm ISM in AGN and non-AGN hosts. We find that in AGN-hosts, the ISM is warmer, the ratios of H2 to PAHs are larger, the PAH emission-line ratios and silicate strengths have a wider range of values than in non-AGN hosts. We find some statistical differences between the H2 emission of mergers and non-mergers, but those differences are less statistically significant than those between AGN and non-AGN hosts. Our results do not establish a relation between the rate of BH growth and the warm ISM but point to highly statistically significant differences between AGN hosts and non-AGN hosts, differences that are not present with the same statistical significance between mergers and non-mergers. We speculate that the combination of triggering mechanisms, AGN orientations, and evolutionary stages that allow AGN to be classified as such in the MIR indicate that those AGN are energetically coupled on kiloparsec scales to their host galaxies’s warm ISM. Future optical and IR, spatially resolved spectroscopic studies are best suited to characterize this connection.
Late-phase Spectropolarimetric Observations of Superluminous Supernova SN 2017egm to Probe the Geometry of the Inner Ejecta
Authors: Saito Sei , Tanaka Masaomi , Moriya Takashi J. , Bulla Mattia , Leloudas Giorgos , Inserra Cosimo , Lee Chien-Hsiu , Kawabata Koji S. , Mazzali Paolo 
Published: May 2020

Abstract
We present our spectropolarimetric observations of SN 2017egm, a Type I superluminous supernova (SLSN-I) in a nearby galaxy NGC 3191, with the Subaru telescope at +185.0 days after the g-band maximum light. This is the first spectropolarimetric observation for SLSNe at late phases. We find that the degree of the polarization in the late phase significantly changes from that measured at the earlier phase. The spectrum at the late phase shows a strong Ca emission line and therefore we reliably estimate the interstellar polarization (ISP) component assuming that the emission line is intrinsically unpolarized. By subtracting the estimated ISP, we find that the intrinsic polarization at the early phase is only ∼0.2%, which indicates an almost spherical photosphere, with an axial ratio ∼1.05. The intrinsic polarization at the late phase increases to ∼0.8%, which corresponds to the photosphere with an axial ratio ∼1.2. A nearly constant position angle of the polarization suggests the inner ejecta are almost axisymmetric. By these observations, we conclude that the inner ejecta are more aspherical than the outer ejecta. This may suggest the presence of a central energy source producing aspherical inner ejecta.
Relative Magnetic Helicity Based on a Periodic Potential Field
Authors: Yang Kai E. , Wheatland Michael S. , Gilchrist Stuart A. 
Published: May 2020

Abstract
Magnetic helicity is conserved under ideal magnetohydrodynamics and quasi-conserved even under a resistive process. The standard definition for magnetic helicity cannot be applied directly to an open magnetic field in a volume, because it is gauge-dependent. Instead, the relative magnetic helicity is widely used. We find that the energy of a potential magnetic field in a rectangular domain with periodic lateral boundary conditions is less than that of the field with a fixed normal component on all six boundaries. To make use of this lower energy potential field in the analysis of relative magnetic helicity, we introduce a new definition for magnetic helicity for the magnetic field, which involves the periodic potential field. We apply this definition to a sequence of analytic solutions and a numerical simulation. The results show that our new gauge-invariant helicity is very close to the current-carrying part of the relative magnetic helicity of the original magnetic field. We find also that the ratio between the current-carrying helicity and the relative magnetic helicity for the original and our defined relative helicity show different behavior. It seems that the new helicity is more sensitive to the component of the field due to the electric current in the volume, which is the source for instabilities and solar eruptive phenomena.
A Systematic Study of Galactic Outflows via Fluorescence Emission: Implications for Their Size and Structure
Authors: Wang Bingjie , Heckman Timothy M. , Zhu Guangtun , Norman Colin A. 
Published: May 2020

Abstract
Galactic outflows play a major role in the evolution of galaxies, but the underlying physical processes are poorly understood. This is mainly because we have little information about the outflow structure, especially on large scales. In this paper, we probe the structure of galactic outflows in low-z starbursts using a combination of ultraviolet spectroscopy and imaging of the fluorescence emission lines (associated with transitions to excited fine-structure levels) and spectroscopy of the corresponding strongly blueshifted resonance absorption lines. We find that, in the majority of cases, the observed fluorescence emission lines are much weaker and narrower than the absorption lines, originating in the star-forming interstellar medium and/or the slowest-moving part of the inner outflow. In a minority of cases, the outflowing absorbing material does make a significant contribution to the fluorescence emission. These latter systems are characterized by both strong Lyα emission lines and weak low-ionization absorption lines (both known to be empirical signs of Lyman-continuum leakage). We argue that the observed weakness of emission from the outflow seen in the majority of cases is due to the missing emission arising on scales larger than those encompassed by the aperture of the Cosmic Origins Spectrograph on board the Hubble Space Telescope. This implies shallow radial density profiles in these outflows, and suggests that most of the observed absorbing material must be created/injected at radii much larger than that of the starburst. This has important implications both for our understanding of the physics of galactic outflows and for our estimation of their principal properties.
Formation of Giant Planet Satellites
Authors: Batygin Konstantin , Morbidelli Alessandro 
Published: May 2020

Abstract
Recent analyses have shown that the concluding stages of giant planet formation are accompanied by the development of a large-scale meridional flow of gas inside the planetary Hill sphere. This circulation feeds a circumplanetary disk that viscously expels gaseous material back into the parent nebula, maintaining the system in a quasi-steady state. Here, we investigate the formation of natural satellites of Jupiter and Saturn within the framework of this newly outlined picture. We begin by considering the long-term evolution of solid material, and demonstrate that the circumplanetary disk can act as a global dust trap, where s
• ∼ 0.1–10 mm grains achieve a hydrodynamical equilibrium, facilitated by a balance between radial updraft and aerodynamic drag. This process leads to a gradual increase in the system’s metallicity, and eventually culminates in the gravitational fragmentation of the outer regions of the solid subdisk into

km satellitesimals. Subsequently, satellite conglomeration ensues via pair-wise collisions but is terminated when disk-driven orbital migration removes the growing objects from the satellitesimal feeding zone. The resulting satellite formation cycle can repeat multiple times, until it is brought to an end by photoevaporation of the parent nebula. Numerical simulations of the envisioned formation scenario yield satisfactory agreement between our model and the known properties of the Jovian and Saturnian moons.
The Drivers of Active Region Outflows into the Slow Solar Wind
Authors: Brooks David H. , Winebarger Amy R. , Savage Sabrina , Warren Harry P. , De Pontieu Bart , Peter Hardi , Cirtain Jonathan W. , Golub Leon , Kobayashi Ken , McIntosh Scott W. , McKenzie David , Morton Richard , Rachmeler Laurel , Testa Paola , Tiwari Sanjiv , Walsh Robert 
Published: May 2020

Abstract
Plasma outflows from the edges of active regions have been suggested as a possible source of the slow solar wind. Spectroscopic measurements show that these outflows have an enhanced elemental composition, which is a distinct signature of the slow wind. Current spectroscopic observations, however, do not have sufficient spatial resolution to distinguish what structures are being measured or determine the driver of the outflows. The High-resolution Coronal Imager (Hi-C) flew on a sounding rocket in 2018 May and observed areas of active region outflow at the highest spatial resolution ever achieved (250 km). Here we use the Hi-C data to disentangle the outflow composition signatures observed with the Hinode satellite during the flight. We show that there are two components to the outflow emission: a substantial contribution from expanded plasma that appears to have been expelled from closed loops in the active region core and a second contribution from dynamic activity in active region plage, with a composition signature that reflects solar photospheric abundances. The two competing drivers of the outflows may explain the variable composition of the slow solar wind.
3D Numerical Simulation of Kink-driven Rayleigh–Taylor Instability Leading to Fast Magnetic Reconnection
Authors: Wongwaitayakornkul Pakorn , Li Hui , Bellan Paul M. 
Published: May 2020

Abstract
Fast magnetic reconnection involving non-MHD microscale physics is believed to underlie both solar eruptions and laboratory plasma current disruptions. While there is extensive research on both the MHD macroscale physics and the non-MHD microscale physics, the process by which large-scale MHD couples to the microscale physics is not well understood. An MHD instability cascade from a kink to a secondary Rayleigh–Taylor instability in the Caltech astrophysical jet laboratory experiment provides new insights into this coupling and motivates a 3D numerical simulation of this transition from large to small scale. A critical finding from the simulation is that the axial magnetic field inside the current-carrying dense plasma must exceed the field outside. In addition, the simulation verifies a theoretical prediction and experimental observation that, depending on the strength of the effective gravity produced by the primary kink instability, the secondary instability can be Rayleigh–Taylor or mini-kink. Finally, it is shown that the kink-driven Rayleigh–Taylor instability generates a localized electric field sufficiently strong to accelerate electrons to very high energy.
A Fast Radio Burst Discovered in FAST Drift Scan Survey
Authors: Zhu Weiwei , Li Di , Luo Rui , Miao Chenchen , Zhang Bing , Spitler Laura , Lorimer Duncan , Kramer Michael , Champion David , Yue Youling , Cameron Andrew , Cruces Marilyn , Duan Ran , Feng Yi , Han Jun , Hobbs George , Niu Chenhui , Niu Jiarui , Pan Zhichen , Qian Lei , Shi Dai , Tang Ningyu , Wang Pei , Wang Hongfeng , Yuan Mao , Zhang Lei , Zhang Xinxin , Cao Shuyun , Feng Li , Gan Hengqian , Gao Long , Gu Xuedong , Guo Minglei , Hao Qiaoli , Huang Lin , Huang Menglin , Jiang Peng , Jin Chengjin , Li Hui , Li Qi , Li Qisheng , Liu Hongfei , Pan Gaofeng , Peng Bo , Qian Hui , Shi Xiangwei , Song Jinyuo , Song Liqiang , Sun Caihong , Sun Jinghai , Wang Hong , Wang Qiming , Wang Yi , Xie Xiaoyao , Yan Jun , Yang Li , Yang Shimo , Yao Rui , Yu Dongjun , Yu Jinglong , Zhang Chengmin , Zhang Haiyan , Zhang Shuxin , Zheng Xiaonian , Zhou Aiying , Zhu Boqin , Zhu Lichun , Zhu Ming , Zhu Wenbai , Zhu Yan 
Published: May 2020

Abstract
We report the discovery of a highly dispersed fast radio burst (FRB), FRB 181123, from an analysis of ∼1500 hr of drift scan survey data taken using the Five-hundred-meter Aperture Spherical radio Telescope (FAST). The pulse has three distinct emission components, which vary with frequency across our 1.0–1.5 GHz observing band. We measure the peak flux density to be >0.065 Jy and the corresponding fluence >0.2 Jy ms. Based on the observed dispersion measure of 1812 cm−3 pc, we infer a redshift of ∼1.9. From this, we estimate the peak luminosity and isotropic energy to be ≲2 × 1043 erg s−1 and ≲2 × 1040 erg, respectively. With only one FRB from the survey detected so far, our constraints on the event rate are limited. We derive a 95% confidence lower limit for the event rate of 900 FRBs per day for FRBs with fluences >0.025 Jy ms. We performed follow-up observations of the source with FAST for four hours and have not found a repeated burst. We discuss the implications of this discovery for our understanding of the physical mechanisms of FRBs.
Activation of HIV-Specific CD8+ T-cells from HIV+ Donors by Vesatolimod
Authors: Ram Renee R , Duatschek Paul , Margot Nicolas , Abram Michael , Geleziunas Romas , Hesselgesser Joseph , Callebaut Christian 
Published: May 2020

Background Vesatolimod (VES; GS-9620) is a Toll-like receptor 7 (TLR7) agonist that directly activates human plasmacytoid dendritic cells (pDCs) and B lymphocytes resulting in direct and indirect production of cytokines and immune activation. VES is being evaluated in HIV-1-infected people as part of an HIV remission strategy. Here we investigated the potential of VES to trigger indirect activation of HIV-specific CD8+ T-cells using immune cell cultures derived from HIV+ donors. Methods Peripheral blood mononuclear cell (PBMC) cultures derived from HIV+ donors virologically suppressed on stable antiretroviral therapy ( n=31) were isolated and treated with VES or vehicle for 24 h. Cells were stained with surface and intracellular fluorescent conjugated antibodies and HIV-specific pentamers, and analysed by flow cytometry. Results Treatment of PBMCs with VES resulted in all 31 donors demonstrating a concentration dependent increase in CD8+ T-cell activation (CD69+) of up to 88%. Of these donors, 20 of 31 donors displayed a concentration-dependent increase in HIV-specific CD8+ T-cell activation due to VES with a maximum of 20.8%. Intracellular staining was performed in a subset of donors ( n=14), 5 of which displayed VES-induced activation of functional HIV-specific CD8+ T-cells as assessed by CD107a and/or tumour necrosis factor (TNF)-α upregulation. Conclusions This study demonstrates that VES treatment can induce the activation of functional HIV-specific CD8+ T-cells in donor derived PBMCs. These data support the potential use of VES to activate functional HIV-specific CD8+ T-cells as part of an HIV remission strategy.
Effect of aerobic exercise on muscle structure and expression of proteins promoting hypertrophy and metabolism in aged rats
Authors: Isobe W. , Murakami S. , Saito T. , Kumagai S. , Sakita M. 
Published: May 2020

Aging and physical inactivity lead to histochemical changes in muscles. The expression of many muscle proteins, including brain-derived neurotrophic factor (BDNF), silent information regulator of transcription 1 (SIRT1), and peroxisome proliferator-activated receptor γγ coactivator-1α (PGC-1a), declines with age. However, the effect of aerobic exercise on muscle structure and the expression profile of these proteins in elderly rats is unknown. Here, we investigated whether short-term aerobic exercise improves muscle structure and increases BDNF, SIRT1, and PGC-1a levels in aged rats. Ten male Wistar rats (95-week-old) were assigned to sedentary (SED) or exercise (Ex) groups. The Ex group performed running on a treadmill for 1 h, 6 times per week, for 2 weeks. The extensor digitorum longus muscles were removed to examine the muscle fibre type composition, cross-sectional area, and capillary-to-fibre (C/F) ratio. BDNF, SIRT1, and PGC-1a levels were evaluated by western blotting. Relative to the SED group, the Ex group showed increased proportion of Type I fibres (P<0.05), cross-sectional area of all muscle fibre types (P<0.05), succinate dehydrogenase activity (P<0.001), C/F ratio (P<0.05), and expression of BDNF, SIRT1, and PGC-1a (P<0.05).Thus, 2 weeks of aerobic exercise is sufficient to improve muscle histology and hypertrophic marker protein expression, indicating that it could prevent skeletal muscle atrophy in elderly rats.
Effects of Lactanase on the plasma lactate response to intense exercise in horses
Authors: Wallace S. , Rankins E.M. , McKeever K.H. 
Published: May 2020

A commonly held belief is that lactate production during exercise limits performance via fatigue. The current study aimed to assess the effects of a supplement marketed as performance enhancing (Lactanase®) on equine exercise performance and plasma lactate concentrations. Lactanase was expected to alter exercise performance and plasma lactate. Eight healthy, unfit Standardbred horses (four geldings and four mares, 9±3 years, 489±33 kg, mean ± standard error) were administered Lactanase (5 doses of 25 g) top-dressed on a commercial pelleted ration or unsupplemented pellets (Control) in a cross-over design experiment. Doses were administered over a four-day period and horses performed a graded exercise test on the fourth day following the final dose of either Lactanase or control. Blood samples (20 ml) were obtained via jugular catheter 30 min prior to exercise, immediately prior to exercise, in the last 10 s of each incremental exercise step, and 5 and 60 min post-exercise. Samples were frozen at -80 °C until further analysis. Data were analysed using a two-way repeated measures ANOVA. Statistically different means were separated using Student-Newman-Keuls and Dunnetts. No differences (P>0.05) in total run time were observed following Lactanase administration. Plasma lactate increased (P<0.05) when horses reached a speed of 7 m/s and remained elevated through 60 min post-exercise. There was no effect (P>0.05) of Lactanase on the plasma lactate response during exercise. Similarly, supplementation did not affect (P>0.05) plasma glucose or total protein at any time point. Exercise did increase plasma total protein (P<0.05), but it returned to baseline levels by 60 min post-exercise. Plasma glucose was elevated (P<0.05) post-exercise. These results indicate Lactanase administration does not alter the lactate response or the total run time to fatigue during intense incremental exercise in horses.
Using Dewey's Conception of Democracy to Problematize the Notion of Disability in Public Education
Authors: Mullins Ricky Dale 
Published: May 2020

In this paper I examine ways in which students with disabilities have the capacity to be full, contributing citizens within a participatory, communicative, and pluralistic democracy. In many instances, institutions such as schools provide barriers that disallow and dissuade students with disabilities from full participation in society and their education, which prevents them from becoming co-creators of their educational experience. I argue that in a Deweyan democracy, all students must have not just the right, but be allowed to grow in their capacity to develop into fully participating, contributing citizens. My hope is that by situating disability and special education within the Deweyan democratic discourse it will be possible to render that discourse more genuinely inclusive of all students, so that the needs of all are met and the unique contributions of each become a part of the educational process.