bluuebunny/crossref_metadata_2025_split huggingface dataset:
Giresun Yöresine Ait Sakarca (Ornithogalum Umbellatum L.) Bitkisinde Toplam Fenolik Madde, Toplam Flavonoid Madde ve İyon Kromatografik Anyon-Katyon İçeriklerinin Tayinleri
Authors: APAYDIN Elif , YOLCU Murat 
Published: May 2018

In this work; total phenolic compounds and total
flovonoid compounds have been identificated of the fresh and diet of Sakarca (Ornithogalum umbellatum L.) plant which has
been abundantly grown in Giresun. Fresh and cooked plant samples were shredded
and extracted with soxhalet in methanol. Total phenolic contents of the were
determined by Folin Ciocalteu method and total flavonoid contents of the
studied samples were determined by
aluminum nitrate method. In addition, some anion-cation content of samples were
simultaneously determined by the studied samples Dionex ICS-5000 ion
chromatography system.
The Next Generation Fornax Survey (NGFS). III. Revealing the Spatial Substructure of the Dwarf Galaxy Population Inside Half of Fornax's Virial Radius
Authors: Ordenes-Briceño Yasna , Eigenthaler Paul , Taylor Matthew A. , Puzia Thomas H. , Alamo-Martínez Karla , Ribbeck Karen X. , P. Muñoz Roberto , Zhang Hongxin , Grebel Eva K. , Ángel Simón , Côté Patrick , Ferrarese Laura , Hilker Michael , Lançon Ariane , Mieske Steffen , Miller Bryan W. , Rong Yu , Sánchez-Janssen Ruben 
Published: May 2018

Abstract
We report the discovery of 271 previously undetected dwarf galaxies in the outer Fornax cluster regions at radii r
vir/4 < r < r
vir/2 using data from the Next Generation Fornax Survey (NGFS) with deep coadded u′, g′, and i′ images obtained with Blanco/DECam at Cerro Tololo Interamerican Observatory. From the 271 dwarf candidates, we find 39 to be nucleated. Together with our previous study of the central Fornax region, the new dwarfs detected with NGFS data number 392, of which 56 are nucleated. The total Fornax dwarf galaxy population from NGFS and other catalogs rises, therefore, to a total of 643 with 181 being nucleated, yielding an overall nucleation fraction of 28%. The absolute i′-band magnitudes for the outer NGFS dwarfs are in the range −18.80 ≤ M

i′ ≤ −8.78 with effective radii r
eff,i′ = 0.18–2.22 kpc and an average Sérsic index

. Nonnucleated dwarfs are found to be fainter and smaller by

mag and

than the nucleated dwarfs. We demonstrate a significant clustering of dwarf galaxies on scales ≲100 kpc, and projected surface number density profile estimates, Σ
N
(r), show a concentration of dwarfs in the Fornax core region within r ≲ 350 kpc. Σ
N
(r) has a flat distribution up to ∼350 kpc, beyond which it declines for the nonnucleated dwarfs. The nucleated dwarfs have a steeper Σ
N
(r) distribution, are more concentrated toward NGC 1399, and are decreasing rapidly outwards. This is the first time the transition from cluster to field environment has been established for the very faint dwarf galaxy population with robust sample statistics.
Hot Cores in Magellanic Clouds
Authors: Acharyya Kinsuk , Herbst Eric 
Published: May 2018

Abstract
We have studied the chemistry of molecules through complex organic molecules (COMs) in complexity in conditions resembling galactic hot molecular cores in the Large and Small Magellanic Clouds using a gas-grain network. To the best of our knowledge, there have been no previous such quantitative studies of hot core chemistry in these low metallicity, dust-poor galaxies. We utilized a physical model that consists of an initial isothermal collapse, followed by a warm-up phase to hot core conditions. Four different temperatures—10, 15, 20, and 25 K—were used for the isothermal collapse phase, considering the fact that these galaxies might have higher dust temperatures in cold regions than observed in the Milky Way. We found that for some abundant species, such as CO and water, hot core abundances are consistent with the reduced elemental abundances of the LMC and SMC. For other less abundant species, such as CH4 and HCN, the calculated abundances are larger when compared with elemental abundances, whereas for species like ammonia they are lower. Our calculations show that some COMs can also be formed in reasonable quantity for hot cores in the Magellanic Clouds when the grain temperature is lower than 25 K. Our results can be compared with recent observations of the hot cores in the high-mass young stellar object (YSO) ST11 and regions A1 and B3 of the star-forming source N113 in the LMC. Model results are in reasonable agreement with the observed abundances and upper limits.
Microlensing and Intrinsic Variability of the Broad Emission Lines of Lensed Quasars
Authors: Fian C. , Guerras Eduardo , Mediavilla E. , Jiménez-Vicente J. , Muñoz J. A. , Falco E. E. , Motta V. , Hanslmeier A. 
Published: May 2018

Abstract
We study the broad emission lines in a sample of 11 gravitationally lensed quasars with at least two epochs of observation to identify intrinsic variability and to disentangle it from microlensing. To improve our statistical significance and emphasize trends, we also include 15 lens systems with single-epoch spectra. Mg ii and C iii] emission lines are only weakly affected by microlensing, but C iv shows strong microlensing in some cases, even for regions of the line core, presumably associated with small projected velocities. However, excluding the strongly microlensed cases, there is a strikingly good match, on average, between the red wings of the C iv and C iii] profiles. Analysis of these results supports the existence of two regions in the broad-line region (BLR), one that is insensitive to microlensing (of size ≳50 lt-day and kinematics not confined to a plane) and another that shows up only when it is magnified by microlensing (of size of a few light-days, comparable to the accretion disk). Both regions can contribute in different proportions to the emission lines of different species and, within each line profile, to different velocity bins, all of which complicates detailed studies of the BLR based on microlensing size estimates. The strength of the microlensing indicates that some spectral features that make up the pseudo-continuum, such as the shelf-like feature at λ1610 or several Fe iii blends, may in part arise from an inner region of the accretion disk. In the case of Fe ii, microlensing is strong in some blends but not in others. This opens up interesting possibilities to study quasar accretion disk kinematics. Intrinsic variability seems to affect the same features prone to microlensing, with similar frequency and amplitude, but does not induce outstanding profile asymmetries. We measure intrinsic variability (≲20%) of the wings with respect to the cores in the C iv, C iii], and Mg ii lines consistent with reverberation mapping studies.
X-Ray Flux and Spectral Variability of Six TeV Blazars with NuSTAR
Authors: Pandey Ashwani , Gupta Alok C. , Wiita Paul J. 
Published: May 2018

Abstract
We report the first results of timing and spectral studies of Nuclear Spectroscopic Telescope Array observations of six TeV-emitting high-frequency peaked blazars: 1ES 0347-121, 1ES 0414+009, RGB J0710+591, 1ES 1101-232, 1ES 1218+304, and H 2356-309. Two out of these six TeV blazars, 1ES 1101−232 and 1ES 1218+304, showed strong evidence of intraday variations in the 3–79 keV energy range during those observations. We also found a hint of an intraday variability timescale of 23.5 ks in the light curve of 1ES 1218+304 using an autocorrelation function analysis. We obtained a magnetic field B ∼ 0.03 G, electron Lorentz factor γ ∼ 2.16 × 106, and emission region size R ∼ 1.19 × 1016 cm for 1ES 1218+304 using that variability timescale. The other blazars’ light curves do not show any variability timescales shorter than their observation lengths; however, we note that the data were both noisier and sparser for them. We also investigated the spectral shape of these TeV blazars and found that the spectrum of 1ES 0414+009 is well described by a single power law with a photon index Γ ∼ 2.77. The spectra of the other five HBLs are somewhat better represented by log-parabola models with local photon indices (at 10 keV) α ∼ 2.23 − 2.67 and curvature parameters β ∼ 0.27 − 0.43.
Ultra-long Gamma-Ray Bursts from the Collapse of Blue Supergiant Stars: An End-to-end Simulation
Authors: Perna Rosalba , Lazzati Davide , Cantiello Matteo 
Published: May 2018

Abstract
Ultra-long gamma-ray bursts (ULGRBs) are a distinct class of GRBs characterized by durations of several thousands of seconds, about two orders of magnitude longer than those of standard long GRBs (LGRBs). The driving engine of these events has not yet been uncovered, and ideas range from magnetars, to tidal disruption events, to extended massive stars, such as blue super giants (BSG). BSGs, a possible endpoint of stellar evolution, are attractive for the relatively long freefall times of their envelopes, allowing accretion to power a long-lasting central engine. At the same time, their large radial extension poses a challenge to the emergence of a jet. Here, we perform an end-to-end simulation aimed at assessing the viability of BSGs as ULGRB progenitors. The evolution to the core-collapse of a BSG star model is calculated with the MESA code. We then compute the accretion rate for the fraction of envelope material with enough angular momentum to circularize and form an accretion disk, and input the corresponding power into a jet, which we evolve through the star envelope with the FLASH code. Our simulation shows that the jet can emerge, and the resulting light curves resemble those observed in ULGRBs, with durations T
90 ranging from ≈4000 s to ≈104 s, depending on the viewing angle.
Peering into the Dark Side: Magnesium Lines Establish a Massive Neutron Star in PSR J2215+5135
Authors: Linares M. , Shahbaz T. , Casares J. 
Published: May 2018

Abstract
New millisecond pulsars (MSPs) in compact binaries provide a good opportunity to search for the most massive neutron stars. Their main-sequence companion stars are often strongly irradiated by the pulsar, displacing the effective center of light from their barycenter and making mass measurements uncertain. We present a series of optical spectroscopic and photometric observations of PSR J2215+5135, a “redback” binary MSP in a 4.14 hr orbit, and measure a drastic temperature contrast between the dark/cold (T
N = 5660

K) and bright/hot (T
D = 8080

K) sides of the companion star. We find that the radial velocities depend systematically on the atmospheric absorption lines used to measure them. Namely, the semi-amplitude of the radial velocity curve (RVC) of J2215 measured with magnesium triplet lines is systematically higher than that measured with hydrogen Balmer lines, by 10%. We interpret this as a consequence of strong irradiation, whereby metallic lines dominate the dark side of the companion (which moves faster) and Balmer lines trace its bright (slower) side. Further, using a physical model of an irradiated star to fit simultaneously the two-species RVCs and the three-band light curves, we find a center-of-mass velocity of K
2 = 412.3 ± 5.0 km s−1 and an orbital inclination i = 63.°9

. Our model is able to reproduce the observed fluxes and velocities without invoking irradiation by an extended source. We measure masses of M
1 = 2.27

M
⊙ and M
2 = 0.33

M
⊙ for the neutron star and the companion star, respectively. If confirmed, such a massive pulsar would rule out some of the proposed equations of state for the neutron star interior.
A Circumbinary Disk Model for the Rapid Orbital Shrinkage in Black Hole Low-mass X-Ray Binaries
Authors: Xu Xiao-Tian , Li Xiang-Dong 
Published: May 2018

Abstract
Several black hole low-mass X-ray binaries (BHLMXBs) show very fast orbital shrinkage, which is difficult to understand in the standard picture of the LMXB evolution. Based on the possible detection of a circumbinary (CB) disk in A0620-00 and XTE J1118+480, we investigate the influence of the interaction between a CB disk and the inner binary and calculate the evolution of the binary using the Modules for Experiments in Stellar Astrophysics. We consider two cases for the CB disk formation in which it is fed by mass loss during single outburst or successive outbursts in the LMXB. We show that when taking reasonable values of the initial mass and the dissipating time of the disk, it is possible to explain the fast orbital shrinkage in the BHLMXBs without invoking a high-mass transfer rate.
Growth of Beam–Plasma Instabilities in the Presence of Background Inhomogeneity
Authors: Shalaby Mohamad , Broderick Avery E. , Chang Philip , Pfrommer Christoph , Lamberts Astrid , Puchwein Ewald 
Published: May 2018

Abstract
We explore how inhomogeneity in the background plasma number density alters the growth of electrostatic unstable wavemodes of beam–plasma systems. This is particularly interesting for blazar-driven beam–plasma instabilities, which may be suppressed by inhomogeneities in the intergalactic medium (IGM) as was recently claimed in the literature. Using high-resolution particle-in-cell simulations with the SHARP code, we show that the growth of the instability is local, i.e., regions with almost homogeneous background density will support the growth of the Langmuir waves even when they are separated by strongly inhomogeneous regions, resulting in an overall slower growth of the instability. We also show that if the background density is continuously varying, the growth rate of the instability is lower, although in all cases the system remains within the linear regime longer and the instability is not extinguished. In all cases, the beam loses approximately the same fraction of its initial kinetic energy in comparison to the uniform case at nonlinear saturation. Thus, inhomogeneities in the IGM are unlikely to suppress the growth of blazar-driven beam–plasma instabilities.
Probing the Curious Case of a Galaxy Cluster Merger in Abell 115 with High-fidelity Chandra X-Ray Temperature and Radio Maps
Authors: Hallman Eric J. , Alden Brian , Rapetti David , Datta Abhirup , Burns Jack O. 
Published: May 2018

Abstract
We present results from an X-ray and radio study of the merging galaxy cluster Abell 115. We use the full set of five Chandra observations taken of A115 to date (360 ks total integration) to construct high-fidelity temperature and surface brightness maps. We also examine radio data from the Very Large Array at 1.5 GHz and the Giant Metrewave Radio Telescope at 0.6 GHz. We propose that the high X-ray spectral temperature between the subclusters results from the interaction of the bow shocks driven into the intracluster medium by the motion of the subclusters relative to one another. We have identified morphologically similar scenarios in Enzo numerical N-body/hydrodynamic simulations of galaxy clusters in a cosmological context. In addition, the giant radio relic feature in A115, with an arc-like structure and a relatively flat spectral index, is likely consistent with other shock-associated giant radio relics seen in other massive galaxy clusters. We suggest a dynamical scenario that is consistent with the structure of the X-ray gas, the hot region between the clusters, and the radio relic feature.
Le dire du taire
Authors: Lani-Bayle Martine 
Published: May 2018

Il est des domaines où le taire a mauvaise réputation, soupçonné de cacher un dire refusé ou signe d’un impossible à dire qui masquerait un problème psychique ou social. Et il serait bon, nécessaire, voire thérapeutique de forcer le dire là où il manque ou résiste. Il est d’autres domaines où le taire est imposé (« silence !!! »), par exemple à l’école où traditionnellement, un bon élève est un élève muet ou qui ne parle qu’après autorisation (doigt levé), juste pour dire en peu de mots la bonne réponse attendue ; à l’Armée (dite Grande Muette) où peut régner l’Omerta… Or, préconiser l’importance de la mise en mots dans la constitution des savoirs, tant personnels (premier cas) que savants ou avouables (second), ne nécessite pas de chasser le silence ou a contrario de rendre la parole obligatoire ; pas plus que prôner l’importance du dire ne nécessite de mettre qui que ce soit « sous écoute ». Si la parole est d’argent , constate avec sagesse le dicton, le silence est d’or .
Le processus d’accès à la parentalité par iad : fonction maternelle et fonction paternelle dans la parentalité lesbienne
Authors: Bapst Mylène , Razon Laure 
Published: May 2018

Cet article propose une réflexion sur les spécificités de l’accès à la parentalité dans la famille lesbienne ayant recours à l’insémination avec donneur ( iad) . Dans une telle configuration dissociant les dimensions biologique, sociale, juridique et symbolique, comment se mettent en place la fonction maternelle et la métaphore paternelle dans une conception d’enfant incluant la nécessité d’un donneur-géniteur ? À partir d’une vignette clinique est mis au travail un questionnement autour du père œdipien, des identifications au couple parental et ce qui constitue le désir d’enfant et de grossesse de la mère de naissance. De même, cet article vise à mettre en lumière la place que peut occuper le donneur dans une iad . Donneur potentiellement mis en place de tiers imaginaire par la mère de naissance et contribuant ainsi à une ouverture possible à la métaphore paternelle.
Extension de l’ amp , questions éthiques et cliniques pour notre temps. Trois points de vue
Authors: Durif-Varembont Jean-Pierre , Rosenblum Ouriel 
Published: May 2018

Les textes rassemblés ici présentent des points de vue complémentaires sur les enjeux sociétaux et éthiques soulevés par les progrès des techniques biomédicales et les évolutions juridiques concernant l’ amp . La vitrification d’ovocytes permet de préserver la fertilité des femmes dans trois situations : face au traitement stérilisant de certaines maladies, pour le don d’ovocytes d’une femme à une autre et pour « convenance personnelle ». Jean-Philippe Wolf en précise l’intérêt et les limites. Geneviève Delaisi de Parseval fournit des hypothèses pour mieux comprendre les résistances à donner leurs gamètes de la part de sujets qui sont pourtant au clair avec le fait qu’il ne s’agit pas de transmettre une filiation mais seulement de donner son hérédité de manière anonyme. En appui sur plusieurs situations précises, Charlotte Dudkiewicz-Sibony témoigne comment les « psys » des cecos fondent depuis quarante ans leur position en matière de gratuité et d’anonymat du don en s’appuyant sur l’écoute au quotidien des couples qui y sont accompagnés dans toute la complexité de leur demande et de leur désir. Les débats restent ouverts sur le maintien de l’anonymat du don, à propos des demandes de personnes transsexuelles et de l’accès à l’ amp des couples de même sexe.
Le Centre de Santé des femmes de Montréal d’hier à aujourd’hui. Des pratiques en mouvement
Authors: Mathieu Marie 
Published: May 2018

Cet article revient sur l’action quotidienne d’un groupe de femmes qui a accompagné la bataille juridique pour le droit à l’avortement libre et gratuit pour toutes les femmes du Québec et qui en assure sa pratique depuis 1980 : le Centre de Santé des femmes de Montréal (CDSFM). S’appuyant sur le pan québécois d’une enquête doctorale sur la construction sociale des expériences contemporaines d’avortement, il donne à voir la manière dont se sont constitués le Centre et son service d’interruption de grossesse et présente les principes fondamentaux développés en son sein et leur traduction en actes. Enfin, il souligne les défis auxquels le CDSFM se trouve confronté depuis une vingtaine d’années. En effet, du fait de son institutionnalisation et d’évolutions récentes (la gratuité générale de l’avortement au Québec, tout comme l’individualisation et la médication croissante de la santé), le Centre se doit de repenser ses ancrages théoriques et ses pratiques pour pérenniser son activité.
IL-36α from Skin-Resident Cells Plays an Important Role in the Pathogenesis of Imiquimod-Induced Psoriasiform Dermatitis by Forming a Local Autoamplification Loop
Authors: Hashiguchi Yuriko , Yabe Rikio , Chung Soo-Hyun , Murayama Masanori A. , Yoshida Kaori , Matsuo Kenzo , Kubo Sachiko , Saijo Shinobu , Nakamura Yuumi , Matsue Hiroyuki , Iwakura Yoichiro 
Published: May 2018

Abstract
IL-36α (gene symbol Il1f6), a member of the IL-36 family, is closely associated with inflammatory diseases, including colitis and psoriasis. In this study, we found that Il1f6−/− mice developed milder psoriasiform dermatitis upon treatment with imiquimod, a ligand for TLR ligand 7 (TLR7) and TLR8, whereas Il1f6−/− mice showed similar susceptibility to dextran sodium sulfate–induced colitis to wild-type mice. These effects were observed in both cohoused and separately housed conditions, and antibiotic treatment did not cancel the resistance of Il1f6−/− mice to imiquimod-induced dermatitis. Bone marrow (BM) cell transfer revealed that IL-36α expression in skin-resident cells is important for the pathogenesis of dermatitis in these mice. Following stimulation with IL-36α, the expression of Il1f6 and Il1f9 (IL-36γ), but not Il1f8 (IL-36β), was enhanced in murine BM-derived Langerhans cells (BMLCs) and murine primary keratinocytes but not in fibroblasts from mice. Upon stimulation with agonistic ligands of TLRs and C-type lectin receptors (CLRs), Il1f6 expression was induced in BMLCs and BM-derived dendritic cells. Furthermore, IL-36α stimulation resulted in significantly increased gene expression of psoriasis-associated Th17-related cytokines and chemokines such as IL-1α, IL-1β, IL-23, CXCL1, and CXCL2 in BMLCs and fibroblasts, and IL-1α, IL-1β, IL-17C, and CXCL2 in keratinocytes. Collectively, these results suggest that TLR/CLR signaling–induced IL-36α plays an important role for the development of psoriasiform dermatitis by enhancing Th17-related cytokine/chemokine production in skin-resident cells via a local autoamplification loop.
Innate Recognition of the Microbiota by TLR1 Promotes Epithelial Homeostasis and Prevents Chronic Inflammation
Authors: Kamdar Karishma , Johnson Andrew M. F. , Chac Denise , Myers Kalisa , Kulur Vrishika , Truevillian Kyle , DePaolo R. William 
Published: May 2018

Abstract
There is cross-talk between the intestinal epithelium and the microbiota that functions to maintain a tightly regulated microenvironment and prevent chronic inflammation. This communication is partly mediated through the recognition of bacterial proteins by host-encoded innate receptors, such as TLRs. However, studies examining the role of TLR signaling on colonic homeostasis have given variable and conflicting results. Despite its critical role in mediating immunity during enteric infection of the small intestine, TLR1-mediated recognition of microbiota-derived ligands and their influence on colonic homeostasis has not been well studied. In this study, we demonstrate that defective TLR1 recognition of the microbiome by epithelial cells results in disruption of crypt homeostasis specifically within the secretory cell compartment, including a defect in the mucus layer, ectopic Paneth cells in the colon, and an increase in the number of rapidly dividing cells at the base of the crypt. As a consequence of the perturbed epithelial barrier, we found an increase in mucosal-associated and translocated commensal bacteria and chronic low-grade inflammation characterized by an increase in lineage-negative Sca1+Thy1hi innate lymphoid-like cells that exacerbate inflammation and worsen outcomes in a model of colonic injury and repair. Our findings demonstrate that sensing of the microbiota by TLR1 may provide key signals that regulate the colonic epithelium, thereby limiting inflammation through the prevention of bacterial attachment to the mucosa and exposure to the underlying immune system.