bluuebunny/crossref_metadata_2025 huggingface dataset:
Genetic distance from wolves affects family dogs’ reactions towards howls
Authors: Lehoczki Fanni , Andics Attila , Kershenbaum Arik , Kubinyi Enikő , Passilongo Daniela , Root-Gutteridge Holly , Range Friederike , Sánchez Vicente Palacios , Schmidt Lori , Townsend Simon W. , Watson Stuart K. , Faragó Tamás
Published: February 2023

Domestication dramatically changes behaviour, including communication, as seen in the case of dogs (Canis familiaris) and wolves (Canis lupus). We tested the hypothesis that domestication may affect an ancient, shared communication form of canids, the howling which seems to have higher individual variation in dogs: the perception and usage of howls may be affected by the genetic relatedness of the breeds to their last common ancestor with wolves (‘root distance’) and by other individual features like age, sex, and reproductive status. We exposed 68 purebred dogs to wolf howl playbacks and recorded their responses. We identified an interaction between root distance and age on the dogs’ vocal and behavioural responses: older dogs from more ancient breeds responded longer with howls and showed more stress behaviours. Our results suggest that domestication impacts vocal behaviour significantly: disintegrating howling, a central, species-specific communication form of canids and gradually eradicating it from dogs’ repertoire.
Separation of amyloid β fragment peptides with racemised and isomerised aspartic acid residues using an original chiral resolution labeling reagent
Authors: Ozaki Makoto , Shimotsuma Motoshi , Kuranaga Takefumi , Kakeya Hideaki , Hirose Tsunehisa
Published: February 2023

We developed a system to separate and identify racemised and isomerised aspartic acid residues in amyloid β by labeling with an original chiral resolution labeling reagent, d-FDLDA.
Metal nanoprobe-decorated all-inorganic perovskite nanocrystal-based fluorescence-linked immunosorbent assay for the detection of tumor-derived exosomes
Authors: Yang Zhaoyan , Zong Shenfei , Jiang Guohua , Zhu Kai , Qian Ziting , Yang Kuo , Wang Zhuyuan , Cui Yiping
Published: February 2023

Functional all-inorganic perovskite nanocrystals-based fluorescence-linked immunosorbent assay for qualitative and quantitative detection of tumor-derived exosomes.
A high resolution Fourier transform ion trap enabled by image current splicing: a theoretical study
Authors: Yan Haoqiang , Li Dayu , Xu Wei
Published: February 2023

The relatively high work pressure within an ion trap has limited the implementation of the Fourier transform technique for high resolution mass analysis.
Advanced (photo)electrocatalytic approaches to substitute the use of fossil fuels in chemical production
Authors: Centi Gabriele , Perathoner Siglinda , Genovese Chiara , Arrigo Rosa
Published: February 2023

Novel directions for (photo)electrocatalytic devices and approaches to expand the current area of research studies are presented to accelerate progress toward a fossil-free future.
MC-QTAIM analysis reveals an exotic bond in coherently quantum superposed malonaldehyde
Authors: Goli Mohammad , Shahbazian Shant
Published: February 2023

The molecular structures of the superposed quantum states of malonaldehyde are deduced computationally disclosing an exotic chemical bonding.
Prediction of donor–acceptor-type novel noble gas complexes in the triplet electronic state
Authors: Kuntar Subrahmanya Prasad , Ghosh Ayan , Ghanty Tapan K.
Published: February 2023

Noble gas donor–acceptor type complexes in triplet electronic state! First ever report of very strong, noble gas–beryllium complexes (3NgBeY+; Ng = He–Rn; Y = N, P) in the triplet state with a large singlet–triplet energy gap and Ng–Be covalent bonding.
2D bimetallic organic framework nanosheets for high-performance wearable power source and real-time monitoring of glucose
Authors: Zha Xiaoting , Yang Wenyao , Shi Liuwei , Zeng Qi , Xu Jianhua , Yang Yajie
Published: February 2023

Ultra-thin 2D bimetallic organic framework nanosheets were fabricated as electrode materials for flexible wearable power sources and non-invasive blood glucose monitoring.
Synthesis of a platinacycle: determination of the structure and examination of the photophysical properties based on DFT calculations
Authors: Motohara Ken , Kado Kazuhiro , Sotani Taichi , Zhou Dayang , Suzuki Takeyuki , Sogawa Hiromitsu , Sanda Fumio
Published: February 2023

A novel platinacycle exhibited a UV–vis absorption assignable to ligand–ligand charge transfer, and birefringence based on molecular alignment.
Iron doped BiOBr loaded on carbon spheres for improved visible-light-driven detoxification of 2-chloroethyl sulfide
Authors: Cai Zixian , Lei Shaoan , Hu Yimin , Chen Yu , Shen Ming , Lei Meiling
Published: February 2023

Visible light photocatalytic degradation of CEES by BiOBr/FeCl3/AC composites.
A novel red phosphor Cs2NaGaF6:Mn4+ with ultra-strong zero-phonon lines and long wavelength phonon sidebands for high-quality WLEDs
Authors: Liao Zhijian , Li Yan , Zuo Jiaxing , Chen Guang , Liang Heng , Wu Shihao , Peng Jiaqing , Ye Xinyu
Published: February 2023

The novel Cs2NaGaF6:Mn4+ fluoride red phosphor has ultra-strong zero-phonon lines and long-wavelength phonon sidebands with large x chromaticity coordinate, which enables high lumen efficiency and wide color gamut for WLEDs.
Potential skin health promoting benefits of costunolide: a therapeutic strategy to improve skin inflammation in imiquimod-induced psoriasis
Authors: Zhan Zi-Ying , Zhang Zhi-Hong , Yang Hong-Xu , Wu Yan-Ling , Nan Ji-Xing , Lian Li-Hua
Published: February 2023

Cos improved psoriasis-like lesions caused by imiquimod stimulation, and might have a therapeutic effect on skin inflammation through P2X7R/IL-36 related pathways.
The stability mechanism of Pickering emulsions fabricated by multi-functional amylose-based nanoparticles in a delivery system
Authors: Wang Pingping , Wang Yang , Chen Chun , Fu Xiong
Published: February 2023

In this work, multi-functional amylose-based nanoparticles (OSA-AM-9/VE NPs) were fabricated via simple and sustainable esterification, encapsulation, and co-precipitation processes of amylose (AM), octenyl succinic anhydride (OSA), and vitamin E (VE).
8 weeks of 2S-hesperidin prevents a decrease in pO2 at submaximal intensity in amateur cyclists in off-season: randomized controlled trial
Authors: Martínez-Noguera Francisco Javier , Alcaraz Pedro E. , Carlos-Vivas Jorge , Marín-Pagán Cristian
Published: February 2023

Although chronic supplementation with 2S-hesperidin has been shown to improve performance, to date, the possible mechanisms underlying this effect have not been explored.
Associations between oral processing, saliva, and bolus properties on daily glucose excursions amongst people at risk of type-2 diabetes
Authors: Goh Ai Ting , Yao Jiali , Chua Xin Hui , Whitton Clare , van Dam Rob M. , Forde Ciarán G.
Published: February 2023

Greater bolus saliva uptake was associated with a higher time spent above the normal range for blood glucose. Salivary amylase and saliva flow rate were not significantly associated with the time spent above the normal range.
In vitro evaluation of probiotic properties of Lactobacillus acidophilus AD125 and antagonism against Escherichia coli O157:H7 adhesion to Caco-2 cell
Authors: Xing Tong-lin , Bian Xin , Ma Chun-min , Yang Yang , Liu Xiao-fei , Wang Yan , Fan Jing , Zhang Na
Published: February 2023

AD125 showed antibacterial activity against E. coli O157:H7 and probiotic properties. It mainly antagonizes the adhesion of E. coli O157:H7 to Caco-2 cells through exclusion and competition.
Stepwise engineering of the pore environment within metal–organic frameworks for green conversion of CO2and propargylic amines
Authors: Zhang Cang-Hua , Hu Tian-Ding , Zhai Yu-Ting , Zhang Ya-Xin , Wu Zhi-Lei
Published: February 2023

The green conversion of CO2and propargylic amines was successfully achieved by using a noble-metal free MOF catalyst.
A MOF-derived Co3O4/nitrogen-doped carbon composite for chlorine-assisted production of ethylene oxide
Authors: Li Tianlei , Liu Hengzhou , Yu Jiaqi , Chen Yifu , Huang Wenyu , Li Wenzhen
Published: February 2023

A MOF-derived cobalt oxide/nitrogen-doped carbon composite is prepared and it exhibits remarkable performance for chlorine-assisted ethylene oxide production.
Unveiling the electrophilic aromatic substitution reactions of pyridine derivatives with nitronium ion through molecular electron density theory
Authors: Domingo Luis R. , Aurell María José
Published: February 2023

The nitration of pyridine Py and pyridine-1-oxide PyO have low activation Gibbs free energies, but in the medium acid, the corresponding pyridinium cation PyH+ is strongly deactivated for the electrophilic aromatic substitution.
Different pretreatment methods combined with subsequent activation to convert waste eucalyptus bark into porous carbon electrode materials for supercapacitors
Authors: Li Kui , Liu Zheng , Ma Xiangmeng , Feng Qingge , Wang Dongbo , Ma Dachao
Published: February 2023

Different pretreatment methods combined with subsequent activation to convert waste eucalyptus bark into porous carbon electrode materials for supercapacitors.
Structure and mechanics of the human nuclear pore complex basket using correlative AFM-fluorescence superresolution microscopy
Authors: Vial Anthony , Costa Luca , Dosset Patrice , Rosso Pietro , Boutières Gaëlle , Faklaris Orestis , Haschke Heiko , Milhiet Pierre-Emmanuel , Doucet Christine M.
Published: February 2023

Correlated fluorescence super-resolution and atomic force microscopy reveal the multiple conformations of human nuclear pore baskets.
Growth of 1D ClAlPc molecular chains mediated by graphene moiré patterns
Authors: Guo Haojie , Jiménez-Sánchez Mariano D. , Martínez-Galera Antonio J. , Gómez-Rodríguez José M.
Published: February 2023

The formation of 1D molecular wires of ClAlPc due to the substrate symmetry breaking of graphene induced by the presence of quasi-1D moiré patterns.
Room-temperature spin-valve devices based on Fe3GaTe2/MoS2/Fe3GaTe2 2D van der Waals heterojunctions
Authors: Jin Wen , Zhang Gaojie , Wu Hao , Yang Li , Zhang Wenfeng , Chang Haixin
Published: February 2023

A room-temperature spin-valve effect was observed in Fe3GaTe2/MoS2/Fe3GaTe2 2D van der Waals (vdW) heterojunction devices.
Ligand-free Ullmann-type arylation of oxazolidinones by diaryliodonium salts
Authors: Podrezova Ekaterina V. , Okhina Alina A. , Rogachev Artem D. , Baykov Sergey V. , Kirschning Andreas , Yusubov Mekhman S. , Soldatova Natalia S. , Postnikov Pavel S.
Published: February 2023

The arylation of azaheterocycles can be considered as one of the most important processes for the preparation of various biologically active compounds.
Low birefringence and low dispersion aliphatic thermosets with a high and tunable refractive index
Authors: Jeon Yujin , Choi Jisung , Seo Donghwa , Jung Soon Hwa , Lim Jeewoo
Published: February 2023

A high-index thermoset was prepared under thiol-free conditions where the refractive index can be controlled over the range of 1.70–1.75.
Understanding the monomer deuteration effect on the transition temperature of poly(N-isopropylacrylamide) microgels in H2O
Authors: Nevolianis Thomas , Scotti Andrea , Petrunin Alexander V. , Richtering Walter , Leonhard Kai
Published: February 2023

Obtaining deuterated microgels is essential to characterize their architecture and determine their response to crowding using neutron scattering. Here, we explain the effect of deuteration on the phase transition temperature.
Enantioselective construction of triaryl-substituted all-carbon quaternary stereocenters via organocatalytic arylation of oxindoles with azonaphthalenes
Authors: Chen Pengquan , Lv Mei-Jun , Cheng Jun Kee , Xiang Shao-Hua , Ren Xiang-Zhong , Zhang Junmin , Tan Bin
Published: February 2023

A CPA-catalyzed asymmetric arylation reaction of oxindoles with azonaphthalenes was established to afford a variety of 3,3-disubstituted oxindole derivatives with a triaryl-substituted quaternary stereocenter in high yields and enantioselectivities.
A strategy to link the changes in the quality traits of Japanese sea bass (Lateolabrax japonicus) muscle and proteins in its exudate during cold storage using mass spectrometry
Authors: Li Xiaoxia , Bi Hongyan
Published: February 2023

The protein in muscle exudate was linked to the changes in the quality traits of fish muscle during storage via MS analysis and pyramid diagrams, opening up new possibilities for understanding the mechanism of muscle changes at the molecular level.
Imine-stabilized silylium ions: synthesis, structure and application in catalysis
Authors: Dajnak Aymeric , Shi Limiao , Altınbaş Özpınar Gül , Lenk Romaric , Saffon-Merceron Nathalie , Baceiredo Antoine , Kato Tsuyoshi , Müller Thomas , Maerten Eddy
Published: February 2023

Novel imine-stabilized silylium ions as efficient catalysts for the hydrosilylation and allylsilylation of carbonyl derivatives under mild conditions.
Experimental radiative cooling rates of a polycyclic aromatic hydrocarbon cation
Authors: Navarro Navarrete José E. , Bull James N. , Cederquist Henrik , Indrajith Suvasthika , Ji MingChao , Schmidt Henning T. , Zettergren Henning , Zhu Boxing , Stockett Mark H.
Published: February 2023

The radiative cooling rate of cationic 1-cyanonaphthalene is determined from storage ring experiments and shown to be consistent with recurrent fluorescence. The rapid cooling helps explain the abundance of the neutral molecule in molecular clouds.
Correction: Effect of the annealing temperature and of Bi substitution on the structural and magnetic behaviors of double-doping (Bi/La, Ca) (La0.8Ca0.2)1−xBixFeO3 compounds
Authors: Issaoui H. , Benali A. , Bejar M. , Dhahri E. , Santos R. F. , Costa B. F. O.
Published: February 2023

Correction for ‘Effect of the annealing temperature and of Bi substitution on the structural and magnetic behaviors of double-doping (Bi/La, Ca) (La0.8Ca0.2)1−xBixFeO3 compounds’ by H. Issaoui et al., New J. Chem., 2020, 44, 9813–9821, https://doi.org/10.1039/D0NJ01962C.
Switching between DNA binding modes with a photo- and redox-active DNA-targeting ligand
Authors: Dohmen Christoph , Ihmels Heiko
Published: February 2023

The combination of a photochromic benzo[b]quinolizinium and a redox-active disulfide linker enables the control of DNA-binding properties by shifting between three different binding modes.
An easy-to-perform evaluation of steric properties of Lewis acids
Authors: Zapf Ludwig , Riethmann Melanie , Föhrenbacher Steffen A. , Finze Maik , Radius Udo
Published: February 2023

An easy-to-perform approach to assess and quantify steric properties of Lewis acids is reported. The novel LAB-Rep model (Lewis acid/base repulsion model) is introduced, which judges steric repulsion in Lewis acid/base pairs.
Self‐supervised non‐rigid structure from motion with improved training of Wasserstein GANs
Authors: Wang Yaming , Peng Xiangyang , Huang Wenqing , Ye Xiaoping , Jiang Mingfeng
Published: February 2023

This study proposes a self‐supervised method to reconstruct 3D limbic structures from 2D landmarks extracted from a single view. The loss of self‐consistency can be reduced by performing a random orthogonal projection of the reconstructed 3D structure. Thus, the training process can be self‐supervised by using geometric self‐consistency in the reconstruction–projection–reconstruction process. The self‐supervised network mainly consists of graph convolution and Transformer encoders. This network is called the SS‐Graphformer. By adding a discriminator, the SS‐Graphformer is used as a generator to form a Wasserstein Generative Adversarial Network architecture with a Gradient Penalty to improve the accuracy of the reconstruction. It is experimentally demonstrated that the addition of the 2D structure discriminator can significantly improve the accuracy of the reconstruction.
The impact of feature selection techniques on effort‐aware defect prediction: An empirical study
Authors: Li Fuyang , Lu Wanpeng , Keung Jacky Wai , Yu Xiao , Gong Lina , Li Juan
Published: February 2023

Effort‐Aware Defect Prediction (EADP) methods sort software modules based on the defect density and guide the testing team to inspect the modules with high defect density first. Previous studies indicated that some feature selection methods could improve the performance of Classification‐Based Defect Prediction (CBDP) models, and the Correlation‐based feature subset selection method with the Best First strategy (CorBF) performed the best. However, the practical benefits of feature selection methods on EADP performance are still unknown, and blindly employing the best‐performing CorBF method in CBDP to pre‐process the defect datasets may not improve the performance of EADP models but possibly result in performance degradation. To assess the impact of the feature selection techniques on EADP, a total of 24 feature selection methods with 10 classifiers embedded in a state‐of‐the‐art EADP model (CBS+) on the 41 PROMISE defect datasets were examined. We employ six evaluation metrics to assess the performance of EADP models comprehensively. The results show that (1) The impact of the feature selection methods varies in classifiers and datasets. (2) The four wrapper‐based feature subset selection methods with forwards search, that is, AdaBoost with Forwards Search, Deep Forest with Forwards Search, Random Forest with Forwards Search, and XGBoost with Forwards Search (XGBF) are better than other methods across the studied classifiers and the used datasets. And XGBF with XGBoost as the embedded classifier in CBS+ performs the best on the datasets. (3) The best‐performing CorBF method in CBDP does not perform well on the EADP task. (4) The selected features vary with different feature selection methods and different datasets, and the features noc (number of children), ic (inheritance coupling), cbo (coupling between object classes), and cbm (coupling between methods) are frequently selected by the four wrapper‐based feature subset selection methods with forwards search. (5) Using AdaBoost, deep forest, random forest, and XGBoost as the base classifiers embedded in CBS+ can achieve the best performance. In summary, we recommend the software testing team should employ XGBF with XGBoost as the embedded classifier in CBS+ to enhance the EADP performance.
Retracted: Intelligent design of rural residential environment guided by blockchain under the concept of green low carbon
Authors: Cheng Shuo , Lu Yao
Published: February 2023

Retraction: [Shuo Cheng, Yao Lu, Intelligent design of rural residential environment guided by blockchain under the concept of green low carbon, IET Software 2023 (https://doi.org/10.1049/sfw2.12119)].

The above article from IET Software, published online on 5 February 2023 in Wiley Online Library (wileyonlinelibrary.com), has been retracted by agreement between the Editor‐in‐Chief, Hana Chockler, the Institution of Engineering and Technology (the IET) and John Wiley and Sons Ltd. This article was published as part of a Guest Edited special issue. Following an investigation, the IET and the journal have determined that the article was not reviewed in line with the journal’s peer review standards and there is evidence that the peer review process of the special issue underwent systematic manipulation. Accordingly, we cannot vouch for the integrity or reliability of the content. As such we have taken the decision to retract the article. The authors have been informed of the decision to retract.
Galactic diffuse gamma rays meet the PeV frontier
Authors: De La Torre Luque P. , Gaggero D. , Grasso D. , Fornieri O. , Egberts K. , Steppa C. , Evoli C.
Published: February 2023

Context. The Tibet ASγ and LHAASO collaborations recently reported the observation of a γ-ray diffuse emission with energy up to the PeV level from the Galactic plane.

Aims. We discuss the relevance of non-uniform cosmic-ray transport scenarios and the implications of these results for cosmic-ray physics.

Methods. We used the DRAGON and HERMES codes to build high-resolution maps and spectral distributions of that emission for several representative models under the condition that they reproduce a wide set of local cosmic-ray data up to 100 PeV.

Results. We show that the energy spectra measured by Tibet ASγ, LHAASO, ARGO-YBJ, and Fermi-LAT in several regions of interest in the sky can all be reasonably described in terms of the emission arising by the Galactic cosmic-ray “sea”. We also show that all our models are compatible with IceTop γ-ray upper limits.

Conclusions. We compare the predictions of conventional and space-dependent transport models with those data sets. Although the Fermi-LAT, ARGO-YBJ, and LHAASO preliminary data slightly favor this scenario, due to the still large experimental errors, the poorly known source spectral shape at the highest energies, the potential role of spatial fluctuations in the leptonic component, and a possible larger-than-expected contamination due to unresolved sources, a solid confirmation requires further investigations. We discuss which measurements will be most relevant in order to resolve the remaining degeneracy.
Modification of the Shower Database of the IAU Meteor Data Center
Authors: Hajduková M. , Rudawska R. , Jopek T. J. , Koseki M. , Kokhirova G. , Neslušan L.
Published: February 2023

Context. The Shower Database (SD) of the Meteor Data Center (MDC) has been operating for 15 yr and is used by the entire community of meteor astronomers. It contains meteor showers categorised in individual lists on the basis of their status. Since the inception of the SD, no objective rules for moving showers between individual lists have been established. The content of the SD has not yet been checked for the correctness of the meteor data contained therein.

Aims. Our aims are (1) to formulate criteria for nominating meteor showers for established status, (2) to improve the rules for the removal of showers, (3) to verify and enhance the content of the SD, and (4) to improve the user area of the MDC SD.

Methods. The criteria for moving showers from the Working list to the Lists of established or removed showers were generated using an empirical evaluation of their impact on the registered showers. The correctness of the parameters of each stream included in the SD was checked by comparing them with the values given in the source publications.

Results. We developed a set of criteria for nominating showers to be established. We objectified rules for the temporary and permanent removal of meteor showers from the Working list. Both of our proposed new procedures were approved by a vote of the commission F1 of the IAU in July 2022. We verified more than 1350 data records of the MDC SD and introduced ~1700 corrections. We included new parameters for shower characterisation. As a result of our verification procedure, 117 showers have been moved to the List of removed showers. As of October 2022, the SD contains 923 showers, 110 of which are in the List of established showers and 813 are in the Working list. We also improved the user area of the SD and added a simple tool to allow a quick check of the similarity of a new shower to those in the database.
Cold gas disks in main-sequence galaxies at cosmic noon: Low turbulence, flat rotation curves, and disk-halo degeneracy
Authors: Lelli Federico , Zhang Zhi-Yu , Bisbas Thomas G. , Lin Lingrui , Papadopoulos Padelis , Schombert James M. , Di Teodoro Enrico , Marasco Antonino , McGaugh Stacy S.
Published: February 2023

We study the dynamics of cold molecular gas in two main-sequence galaxies at cosmic noon (zC-488879 at z ≃ 1.47 and zC-400569 at z ≃ 2.24) using new high-resolution ALMA observations of multiple 12CO transitions. For zC-400569 we also reanalyze high-quality Hα data from the SINS/zC-SINF survey. We find that (1) both galaxies have regularly rotating CO disks and their rotation curves are flat out to ∼8 kpc contrary to previous results pointing to outer declines in the rotation speed Vrot; (2) the intrinsic velocity dispersions are low (σCO ≲ 15 km s−1 for CO and σHα ≲ 37 km s−1 for Hα) and imply Vrot/σCO ≳ 17 − 22 yielding no significant pressure support; (3) mass models using HST images display a severe disk-halo degeneracy, that is models with inner baryon dominance and models with “cuspy” dark matter halos can fit the rotation curves equally well due to the uncertainties on stellar and gas masses; and (4) Milgromian dynamics (MOND) can successfully fit the rotation curves with the same acceleration scale a0 measured at z ≃ 0. The question of the amount and distribution of dark matter in high-z galaxies remains unsettled due to the limited spatial extent of the available kinematic data; we discuss the suitability of various emission lines to trace extended rotation curves at high z. Nevertheless, the properties of these two high-z galaxies (high Vrot/σV ratios, inner rotation curve shapes, bulge-to-total mass ratios) are remarkably similar to those of massive spirals at z ≃ 0, suggesting weak dynamical evolution over more than 10 Gyr of the Universe’s lifetime.
Lyman continuum leaker candidates among highly ionised, low-redshift dwarf galaxies selected from He II
Authors: Enders A. U. , Bomans D. J. , Wittje A.
Published: February 2023

Context. Contemporary research suggests that the reionisation of the intergalactic medium (IGM) in the early Universe was predominantly realised by star-forming (proto-)galaxies (SFGs). Due to observational constraints, our knowledge on the origins of sufficient amounts of ionising Lyman continuum (LyC) photons and the mechanisms facilitating their transport into the IGM remains sparse. Recent efforts have thus focussed on the study of local analogues to these high-redshift objects.

Aims. We aim to acquire a set of very low-redshift SFGs that exhibit signs of a hard radiation field being present. A subsequent analysis of their emission line properties is intended to shed light on how the conditions prevalent in these objects compare to those predicted to be present in early SFGs that are thought to be LyC emitters (LCEs).

Methods. We used archival spectroscopic SDSS DR12 data to select a sample of low-redshift He II 4686 emitters and restricted it to a set of SFGs with an emission line diagnostic sensitive to the presence of an active galactic nucleus, which serves as our only selection criterion. We performed a population spectral synthesis with FADO to reconstruct these galaxies’ star-formation histories (SFHs). Utilising the spectroscopic information at hand, we constrained the predominant ionisation mechanisms in these galaxies and inferred information on interstellar medium (ISM) conditions relevant for the escape of LyC radiation.

Results. Our final sample consists of eighteen ionised, metal-poor galaxies (IMPs). These low-mass (6.2 ≤ log(M⋆/M⊙) ≤ 8.8), low-metallicity (7.54 ≤ log(O/H) + 12 ≤ 8.13) dwarf galaxies appear to be predominantly ionised by stellar sources. We find large [OIII] 5007/[OII] 3727 ratios and [SII] 6717,6731/Hα deficiencies, which provide strong indications for these galaxies to be LCEs. At least 40% of these objects are candidates for featuring cosmologically significant LyC escape fractions ≳10%. The IMPs’ SFHs exhibit strong similarities and almost all galaxies appear to contain an old (> 1 Gyr) stellar component, while also harbouring a young, two-stage (∼10 Myr and < 1 Myr) starburst, which we speculate might be related to LyC escape.

Conclusions. The properties of the compact emission line galaxies presented here align well with those observed in many local LCEs. In fact, our sample may prove as an extension to the rather small catalogue of local LCEs, as the extreme ISM conditions we find are assumed to facilitate LyC leakage. Notably, all of our eighteen candidates are significantly closer (z < 0.1) than most established LCEs. If the inferred LyC photon loss is genuine, this demonstrates that selecting SFGs from He II 4686 is a powerful selection criterion in the search for LCEs.
The LOFAR LBA Sky Survey
Authors: de Gasperin F. , Edler H. W. , Williams W. L. , Callingham J. R. , Asabere B. , Brüggen M. , Brunetti G. , Dijkema T. J. , Hardcastle M. J. , Iacobelli M. , Offringa A. , Norden M. J. , Röttgering H. J. A. , Shimwell T. , van Weeren R. J. , Tasse C. , Bomans D. J. , Bonafede A. , Botteon A. , Cassano R. , Chyży K. T. , Cuciti V. , Emig K. L. , Kadler M. , Miley G. , Mingo B. , Oei M. S. S. L. , Prandoni I. , Schwarz D. J. , Zarka P.
Published: February 2023

Context. The Low Frequency Array (LOFAR) is the only existing radio interferometer able to observe at ultra-low frequencies (<100 MHz) with high resolution (<15") and high sensitivity (<1 mJy beam−1). To exploit these capabilities, the LOFAR Surveys Key Science Project is using the LOFAR Low Band Antenna (LBA) to carry out a sensitive wide-area survey at 41–66 MHz named the LOFAR LBA Sky Survey (LoLSS).

Aims. LoLSS is covering the whole northern sky above declination 24° with a resolution of 15" and a sensitivity of 1–2 mJy beam−1 (1σ) depending on declination, field properties, and observing conditions. Here we present the first data release, including a discussion of the calibration strategy and the properties of the released images and catalogues.

Methods. A fully automated pipeline was used to reduce the 95 fields included in this data release. The data reduction procedures developed for this project have a general application and are currently being used to process almost all LOFAR LBA interferometric observations. Compared to the preliminary release, direction-dependent errors have been derived and corrected for during the calibration process. This results in a typical sensitivity of 1.55 mJy beam−1, which is four times better than for the preliminary release, at the target resolution of 15".

Results. The first data release of the LOFAR LBA Sky Survey covers 650 deg2 in the HETDEX spring field. The resultant data products released to the community include mosaic images (I and V Stokes) of the region, and a catalogue of 42 463 detected sources and related Gaussian components used to describe the sources' morphologies. Separate catalogues for the six in-band frequencies of 44, 48, 52, 56, 60, and 64 MHz are also released.

Conclusions. The first data release of LoLSS shows that, despite the influences of the ionosphere and radio frequency interference, LOFAR can conduct large-scale surveys in the frequency window 42-66 MHz with unprecedentedly high sensitivity and resolution. The data can be used to derive unique information on the low-frequency spectral properties of many thousands of sources with a wide range of applications in extragalactic and galactic astronomy.
Extended neutral hydrogen filamentary network in NGC 2403
Authors: Veronese Simone , de Blok W. J. G. , Walter F.
Published: February 2023

We present new neutral hydrogen (H I) observations of the nearby galaxy NGC 2403 to determine the nature of a low-column-density cloud that was detected earlier by the Green Bank Telescope. We find that this cloud is the tip of a complex of filaments of extraplanar gas that is coincident with the thin disk. The total H Imass of the complex is 2 × 107 M⊙or 0.6% of the total H Imass of the galaxy. The main structure, previously referred to as the 8 kpc filament, is now seen to be even more extended, along a 20 kpc stream. The kinematics and morphological properties of the filaments are unlikely to be the result of outflows related to galactic fountains. It is more likely that the 20 kpc filament is related to a recent galaxy interaction. In this context, a ∼50 kpc long stellar stream has recently been detected connecting NGC 2403 with the nearby dwarf satellite DDO 44. Intriguingly, the southern edge of this stream overlaps with the tip of the 20 kpc H Ifilament. We conclude that the H Ianomalies in NGC 2403 are the result of a recent (∼2Gyr) interaction with DDO 44 leading to the observed filamentary complex.
Capturing the lowest luminosity state of the supergiant fast X-ray transient XTE J1739−302
Authors: Sidoli L. , Ponti G. , Sguera V. , Esposito P.
Published: February 2023

Here, we report the results of our analysis of recent Chandra, XMM-Newton, and NuSTAR observations of the supergiant fast X-ray transient XTE J1739−302. The source was caught in a low X-ray luminosity state, from a few 1031–1034 erg s−1 (0.5–10 keV). A very low X-ray luminosity was captured during an XMM-Newton observation performed in October 2022, at a few 1031 erg s−1 (0.5–10 keV), which had never been observed before in XTE J1739−302. The XMM-Newton spectrum could be well fitted either by an absorbed, steep power-law model (photon index of 3.5) or by a collisionally ionized diffuse gas with a temperature of 0.7 keV that would very likely have been produced by shocks in the supergiant donor wind. These observations covered different orbital phases, but they all appear compatible with the low luminosity level expected from the orbital INTEGRAL light curve. The absorbing column density is variable in the range between 1022 and 1023 cm−2. The broadband X-ray spectrum was feasibly investigated at 1034 erg s−1 (0.5–30 keV) for the first time in XTE J1739−302 with non-simultaneous (albeit at similar orbital phases) Chandra and NuSTAR data, showing a power-law spectral shape with a photon index of ∼2.2 and an absorbing column density of ∼1023 cm−2. Remarkably, owing to the XMM-Newton observation, the amplitude of the X-ray variability now exceeds five orders of magnitude, making XTE J1739−302 one of the most extreme SFXTs.
Approches moléculaires et thérapeutiques des interactions entre l’ocytocine et son récepteur
Authors: Hibert Marcel
Published: February 2023

L’ocytocine est une neurohormone connue à l’origine pour son rôle dans les contractions de l’utérus au moment de l’accouchement et les contractions des glandes mammaires pour permettre l’éjection du lait lors de la tétée. Depuis les 25 dernières années, de multiples autres effets centraux et périphériques ont été identifiés, notamment dans les processus d’attachement entre parents et enfant, entre adultes et entre un individu et son groupe social. Nous avons abordé au cours de cette période la question fondamentale de l’architecture structurale et fonctionnelle du complexe formé par l’ocytocine et son récepteur et l’application de ce savoir à la conception de candidats médicaments. Ceci a conduit à la découverte du premier agoniste non peptidique de l’ocytocine, le LIT-001, restaurant l’interaction sociale dans un modèle animal d’autisme.
L’ocytocine, dès la naissance, conditionne le comportement alimentaire et social d’un individu
Authors: Muscatelli Françoise
Published: February 2023

L’ocytocine (OT) est une neurohormone qui, dans le cerveau, régule ce que l’on appelle le « cerveau social » et dont l’étude est principalement conduite chez l’adulte. Au cours du développement postnatal, les mécanismes par lesquels le système OT structure divers comportements sont peu explorés. Nous présentons ici le processus dynamique du développement postnatal du système OT ainsi que ses rôles fonctionnels, en période périnatale, qui sont essentiels pour façonner les comportements sociaux. Nous abordons spécifiquement le rôle de l’OT chez le nouveau-né, qui permet d’intégrer et d’adapter des réponses aux premières stimulations sensorielles et qui stimule aussi l’activité de succion. Ce dialogue sensoriel et la tétée sont impliqués dans les liens mère-enfant et structurent les futures interactions sociales. Chez les rongeurs et chez l’homme, des maladies neuro-développementales avec des troubles du spectre autistique, comme les syndromes de Prader-Willi et de Schaaf-Yang, sont associées à des déficiences sensorielles, alimentaires et comportementales dans la petite enfance. Nous proposons qu’au début de la vie postnatale, l’OT joue un rôle clé dans la maturation des réseaux neuronaux contrôlant le comportement alimentaire et les premières interactions sociales. Une administration d’OT chez le nouveau-né améliore l’intégration sensorielle des facteurs environnementaux et la relation avec la mère ainsi que l’activité de succion comme nous l’avons montré chez des modèles de souris ainsi que chez des bébés atteints du syndrome de Prader-Willi. Des effets à long terme ont aussi été observés sur le comportement social et cognitif. Par conséquent, les difficultés précoces d’alimentation peuvent être un marqueur prédictif précoce des cas de troubles du spectre autistique (TSA) et l’administration exogène d’OT pourrait améliorer le comportement alimentaire et, à plus long terme, les troubles du comportement social.
La prolactine et son récepteur : Des modèles animaux à la physiopathologie hypophysaire
Authors: Begon Emmanuelle , Bernard Valérie
Published: February 2023

La prolactine (PRL), hormone de la lactation par excellence, est majoritairement synthétisée et sécrétée par les cellules lactotropes de l’antéhypophyse. Ses actions sont médiées par le récepteur transmembranaire de la prolactine (PRLR). Alors que plus de 300 fonctions différentes ont été attribuées à cette hormone selon les espèces, son rôle chez l’Homme reste limité au développement de la glande mammaire et à l’allaitement. Les pathologies en lien avec la PRL sont essentiellement celles rencontrées en cas d’hypersécrétion de cette hormone. En effet, l’hyperprolactinémie entraîne l’altération du fonctionnement de l’axe gonadotrope chez l’homme comme chez la femme. Ainsi, l’hyperprolactinémie est une étiologie fréquente d’hypogonadisme hypogonadotrope acquis et l’une des principales causes d’anovulation et d’infertilité chez la femme. Ces dernières années, les études de modèles murins invalidés pour le PRLR, de manière globale ou conditionnelle dans l’hypophyse, ont permis d’apporter de nouveaux éléments dans la compréhension de la régulation des axes gonadotrope et lactotrope. Il est maintenant démontré que la prolactine exerce des actions autocrines ou paracrines sur les cellules lactotropes in vivo. Une des avancées majeures a été de mieux comprendre, à l’aide des modèles murins, l’impact de l’hyperprolactinémie sur l’axe gonadotrope. C’est ainsi qu’il a pu être établi que, comme chez les rongeurs, l’hypogonadisme hypogonadotrope chez les patientes atteintes d’hyperprolactinémie est médié par un déficit de sécrétion de kisspeptine hypothalamique, et que l’axe gonadotrope peut être restauré par l’administration intraveineuse de kisspeptine. Les mécanismes de tumorigenèse lactotrope des animaux Prlr −/− restent cependant incomplètement compris et transposables dans l’espèce humaine, puisque, jusqu’à présent, l’unique patiente porteuse d’une mutation bi-allélique perte de fonction du PRLR ayant fait l’objet d’une publication présentait une imagerie hypophysaire sans anomalie.
L’hyperaldostéronisme primaire du chat
Authors: Fabrès Virginie
Published: February 2023

L’hyperaldostéronisme primaire (HAP) est une dysendocrinie émergente chez le chat, caractérisée par une sécrétion excessive et autonome d’aldostérone par une tumeur unilatérale ou bilatérale ou par une hyperplasie bilatérale de la zone glomérulée. Les signes cliniques sont le plus souvent secondaires à la présence d’une hypokaliémie et/ou d’une hypertension. Compte tenu de l’absence de test de confirmation disponible, le diagnostic de l’HAP représente un vrai défi. Les examens d’imagerie sont nécessaires afin de déterminer la meilleure prise en charge thérapeutique. En effet, en présence d’une tumeur unilatérale non métastatique, la surrénalectomie est le traitement de choix.
Suivi et surveillance du traitement au trilostane
Authors: Maufras Thomas , Fabrès Virginie
Published: February 2023

Depuis quelques années, le traitement de l’hypercorticisme spontané repose sur l’utilisation du trilostane (Vétoryl®, Dechra). Le but du traitement est de contrôler les signes tout en limitant les effets secondaires. Un suivi clinique et biologique des patients traités à l’aide de trilostane est donc nécessaire. Le test de stimulation à l’ACTH a longtemps été utilisé pour adapter le traitement. Toutefois, ce dernier présente plusieurs limites, à l’origine de plusieurs études tentant de lui trouver une alternative telle que le dosage du cortisol avant et après administration du trilostane, des haptoglobines, des ALAT et/ou des GGT sanguines. Les données disponibles à l’heure actuelle ne nous permettent pas de déterminer la méthode de suivi idéale du traitement au trilostane. Le principal outil de suivi reste l’évaluation clinique de l’animal et chaque examen biologique doit être interprété à la lumière de celle-ci.
Who is afraid of emergency politics? Public opinion on European crisis management during Covid-19
Authors: Ganderson Joseph , Schelkle Waltraud , Truchlewski Zbigniew
Published: February 2023

After a decade of crisis management, the democratic implications of emergency modes of governance in the European Union (EU) are under the spotlight. The prevailing analysis is critical. Scholars point to an emergent, distinctly European trend of transnational crisis exploitation where elite appeals to exceptional pressures serve asymmetric power and influence, overriding democratic norms and potentially fuelling Eurosceptic backlash. However, the literature does not ask whether citizens consider themselves disempowered by the EU’s emergency politics, with its alleged emphasis on urgency and technocratic problem-solving. The relative symmetry and simultaneity of the Covid-19 crisis across Europe offers an opportunity for an empirical examination of public opinion on traits of emergency politics. We juxtapose the implications of emergency politics for public opinion with the transnational cleavages literature and use survey data from 15 member states on EU- and national-level pandemic responses to examine the competing hypotheses. Our findings indicate perceptions of crisis management are largely determined by prior views on EU integration and democracy. More generally, the results suggest that the transnational cleavage remains overall a key driver and delimiter of Euroscepticism in crisis times. Though there is some variance between emergency politics dimensions, we do not detect a widespread perception of disillusionment motivated by EU emergency rule.
The dual effect of digital communication reinforcement drivers on purchase intention in the social commerce environment
Authors: Selem Kareem M. , Shoukat Muhammad Haroon , Shah Syed Asim , de Brito Silva Marianny Jessica
Published: February 2023

The paper draws on the theory of planned behavior (TPB) to investigate the dual effect of digital communication reinforcement drivers: positive (i.e., interactivity, argument quality, hedonic motivation, and perceived enjoyment online) and negative (i.e., intrusive concerns and privacy concerns) on purchase intention. This paper also examines the mediation effect of perceived usefulness and the moderation effect of habit. Using a time-lag approach, 490 responses were collected from Pakistan’s social media users and then analyzed using SmartPLS v.3.2.8. Findings showed that interactivity, argument quality, and privacy concerns significantly affected purchase intention. Furthermore, perceived usefulness was partially mediated, and habit was discovered to be a significant moderator in liking perceived usefulness with enjoyment online and purchase intention. This paper advances TPB understanding and develops an integrated model for businesses to better understand customer physiology on social commerce platforms through effective contributions in theory and practice.
Glass transition temperature offers insights into the thermodynamics of bacterial growth
Authors: Lim Alane
Published: February 2023

A model typically applied to non-living materials could improve our understanding of organisms.
MBE-grown Fe:Pd/ZnSe Schottky-barrier photodetector: Distinguishing blue + UV light levels among white light sources
Authors: Lin Shek-Ying , He Zhihao , To Yick On , Sou Iam Keong
Published: February 2023

Blue and ultraviolet radiation is well known to be associated with cataract formation and visual damage. Nowadays, children and teenagers are increasingly exposed to blue light and electromagnetic radiation with even shorter wavelength, which may cause damage to vision due to their frequent use of electronic display devices and participation in disco parties and concerts with illumination by UV light. We developed a Fe:Pd/ZnSe Schottky barrier photodetector that detects blue and UV light with excellent long-wavelength rejection power for green and red light of 4.24 and 5.65 orders, respectively. Its Schottky-barrier height and built-in potential are determined to be 2.48 and 1.17 eV, respectively. Together with the help of a lux meter, this simple and robust photodetector detects the blue light + UV content of different LED light bulbs with accuracy comparable to the much more sophisticated and expensive spectrometer. This compact and efficient blue + UV light detector can help us to increase the awareness of over-exposure to vision damaging radiation.
Synthesis of freestanding perovskite oxide thin films by using brownmillerite SrCoO2.5 as a sacrificial layer
Authors: Zhou Weikun , Han Wenqiao , Yang Yihao , Shu Liang , Luo Qinggui , Ji Yanjiang , Jin Cai , Zhang Yingli , Song Jiahao , Ye Mao , Liu Qi , Hu Songbai , Chen Lang
Published: February 2023

Freestanding perovskite thin films display many unprecedented properties and exhibit the potential to be easily integrated on other non-oxide substrates or layers. In this work, we demonstrated a pathway to synthesis freestanding perovskite oxide thin films by using brownmillerite SrCoO2.5 as a sacrificial layer. Four representative freestanding perovskite oxide films, e.g., ferromagnetic SrRuO3, La0.7Sr0.3MnO3, dielectric SrTiO3, and ferroelectric Pb(Zr0.2Ti0.8)O3, were produced by etching SrCoO2.5 in Fe(NO3)3 weak acidic solution at room temperature. A 80 nm SrRuO3, which served as an H+ conduction channel, was deposited as a bottom layer of SrCoO2.5 to trigger a quick dissolution for the exfoliation of SrTiO3 and Pb(Zr0.2Ti0.8)O3 poor H+ conductor. Their crystal structure and physical properties were well retained in transferred films. Our work demonstrated the wide applicability of SrCoO2.5 as a sacrificial layer on the synthesis of freestanding perovskite oxide thin films.
Strategy for driving high velocity flyer by coupling laser and electric explosion
Authors: Wang Ke , Chen Jianhua , Li Jiao , Chu Enyi , Zhu Peng , Shen Ruiqi
Published: February 2023

In this study, a novel high-speed flyer launching strategy based on electric explosion and laser coupling was proposed to improve the launching ability of electro-explosively actuators and expand the dynamic high-pressure loading method. First, an electro-explosively actuated flyer launcher with a transparent glass substrate was fabricated by microelectromechanical system (MEMS) scale methods, which acted as a carrier to verify the idea of electric explosion and laser coupling. Then, a device of electric explosion combined with laser driving high-speed flyers was established to study the influence of nanosecond pulsed laser on the flyer launching ability of electro-explosively actuators. Finally, the velocity characteristics of the flyer and the plasma characteristics under coupled conditions are studied. The test results indicated that the introduction of laser had a positive effect on increasing the speed of the flyer. In addition, it was found that the acceleration history of the flyer is affected by the energy of electric explosion, laser energy, and the introduction time of laser.