bluuebunny/crossref_metadata_2025 huggingface dataset:
RETRACTED ARTICLE: Formation of giant iron oxide-copper-gold deposits by superimposed, episodic hydrothermal pulses
Authors: Del Real Irene , Reich Martin , Simon Adam C. , Deditius Artur , Barra Fernando , Rodríguez-Mustafa María A. , Thompson John F. H. , Roberts Malcolm P.
Published: September 2021

Iron oxide-copper-gold deposits are a globally important source of copper, gold and critical commodities. However, they possess a range of characteristics related to a variety of tectono-magmatic settings that make development of a general genetic model challenging. Here we investigate micro-textural and compositional variations in actinolite, to constrain the thermal evolution of the Candelaria iron oxide-copper-gold deposit in Chile. We identify at least two mineralization stages comprising an early 675–800 °C iron oxide-apatite type mineralization overprinted by a later copper-rich fluid at around 550–700 °C. We propose that these distinct stages were caused by episodic pulses of injection of magmatic-hydrothermal fluids from crystallizing magmas at depth. We suggest that the mineralisation stages we identify were the result of temperature gradients attributable to changes in the magmatic source, rather than variations in formation depth, and that actinolite chemistry can be used as a proxy for formation temperature in iron oxide-copper-gold systems.
Biomass-derived carbon quantum dots: a novel and sustainable fluorescent “ON–OFF–ON” sensor for ferric ions
Authors: Qureashi Aaliya , Pandith Altaf Hussain , Bashir Arshid , Malik Lateef Ahmad
Published: September 2021

Synthetically green and economic, highly sensitive fluorescent CQDs derived from lotus stem for Fe3+ sensing in aqueous solutions.
Mechanochemical synthesis of aromatic sulfonamides
Authors: Mkrtchyan Satenik , Iaroshenko Viktor O.
Published: September 2021

New paths of entry to aromatic sulfonamides were developed using mechanochemical one-pot three-component synthetic protocols based on the Pd-catalyzed aminosulfonylation reaction of aryl bromides or aromatic carboxylic acids.
Mix-and-read, one-minute SARS-CoV-2 diagnostic assay: development of PIFE-based aptasensor
Authors: Lee J. Michelle , Kim Chae Rin , Kim Sion , Min Junhong , Lee Min-Ho , Lee SangWook
Published: September 2021

Here, we developed a rapid and quantitative one-step severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) antigen assay based on protein-induced fluorescence enhancement (PIFE) of a nucleocapsid (N) protein DNA aptamer.
Separation of a diastereomeric diol pair using the mechanical properties of crystals
Authors: Gamidi Rama Krishna , Dandawate Monica , Tothadi Srinu , Choudhury Rahul , Nangia Ashwini K. , Reddy D. Srinivasa
Published: September 2021

The visually indistinguishable acicular crystals of a (2S,3R/S)-3-ethyl-1-phenylhex-5-ene-2,3-diol (ephd) diastereomeric pair are separated via the mechanical response based on elastic (2S,3R, right) and brittle (2S,3S, left) crystals.
Strong response of Pt clusters to the environment and conditions, formation of metastable states, and simple methods to trace the reversible changes
Authors: Lisitsyn Alexander S. , Kadtsyna Anastasiya S.
Published: September 2021

Pt/γ-Al2O3manifests itself as a self-organizing system, which reacts actively to conditions but can retain memory, a short or long, of its treatment history.
Probing the formation of isolated cyclo-FF peptide clusters by far-infrared action spectroscopy
Authors: Bakels Sjors , Stroganova Iuliia , Rijs Anouk M.
Published: September 2021

Rigid cyclo-FF peptide aggregates have been studied under isolated conditions using a molecular beam-laser desorption setup. Far-IR action spectroscopy provided highly diagnostic spectra, allowing the assignment of various ladder-like conformations.
Two-photon absorption properties of multipolar triarylamino/tosylamido 1,1,4,4-tetracyanobutadienes
Authors: Ripoche Nicolas , Betou Marie , Philippe Clotilde , Trolez Yann , Mongin Olivier , Dudek Marta , Pokladek Ziemowit , Matczyszyn Katarzyna , Samoc Marek , Sahnoune Hiba , Halet Jean-François , Roisnel Thierry , Toupet Loic , Cordier Marie , Moxey Graeme J. , Humphrey Mark G. , Paul Frédéric
Published: September 2021

The structural and electronic factors influencing their two-photon absorption cross-sections of nine TCBD derivatives are discussed.
Unraveling the varied nature and roles of defects in hybrid halide perovskites with time-resolved photoemission electron microscopy
Authors: Kosar Sofiia , Winchester Andrew J. , Doherty Tiarnan A. S. , Macpherson Stuart , Petoukhoff Christopher E. , Frohna Kyle , Anaya Miguel , Chan Nicholas S. , Madéo Julien , Man Michael K. L. , Stranks Samuel D. , Dani Keshav M.
Published: September 2021

Hybrid halide perovskites are found to contain multiple types of nanoscale defects that play varied roles in charge trapping – from highly detrimental to relatively benign.
Lanthanide electronic perturbation in Pt–Ln (La, Ce, Pr and Nd) alloys for enhanced methanol oxidation reaction activity
Authors: Zhang Shuai , Zeng Zhichao , Li Qingqing , Huang Bolong , Zhang Xinyu , Du Yaping , Yan Chun-Hua
Published: September 2021

A series of PtLn alloys have been synthesized to act as efficient electrocatalysts for methanol oxidation reactions, where the electronic perturbations of lanthanide guarantee high electroactivity and long-term durability.
Pseudo-solid-state electrolytes utilizing the ionic liquid family for rechargeable batteries
Authors: Hwang Jinkwang , Matsumoto Kazuhiko , Chen Chih-Yao , Hagiwara Rika
Published: September 2021

This review summarises the properties and electrochemical performance of pseudo-solid-state electrolytes prepared using ionic liquids, along with insights into design strategies to improve their application in various secondary batteries.
Effect of cranberry juice deacidification on its antibacterial activity against periodontal pathogens and its anti-inflammatory properties in an oral epithelial cell model
Authors: Pellerin Geneviève , Bazinet Laurent , Grenier Daniel
Published: September 2021

When it comes to the prevention of periodontitis, high level deacidification of cranberry juice by EDBM reduces the potential health effects of the beverage.
Design of Co1Al3(OH)m/carbon nitride hybrid nanostructures for enhanced capacitive energy storage in an alkaline electrolyte
Authors: Panda Prajnashree , Mishra Ranjit , Panigrahy Sonali , Barman Sudip
Published: September 2021

Layered double hydroxide (LDH) nanostructures have attracted the attention of the scientific community owing to their facile synthesis, interesting structure and morphology, and have been promising in the field of energy storage applications.
Ruthenium(ii)–arene complexes as anti-metastatic agents, and related techniques
Authors: Sonkar Chanchal , Sarkar Sayantan , Mukhopadhyay Suman
Published: September 2021

Herein, we review the latest information on ruthenium(ii) arene complexes that have shown anti-metastatic properties. We have also discussed about the targets of metastasis and the techniques used for these complexes, proving them as anti-metastatic agents.
Multifunctional self-assembled peptide nanoparticles for multimodal imaging-guided enhanced theranostic applications against glioblastoma multiforme
Authors: Rizvi Syed Faheem Askari , Ali Azam , Ahmad Munir , Mu Shuai , Zhang Haixia
Published: September 2021

This study describes the development of self-assembled peptide nanoparticles with improved functionality via modifications by using multimodal imaging tools and enhanced the therapeutic efficacy against brain tumor glioblastoma multiforme.
Predicted structure and selectivity of 3d transition metal complexes with glutamicN,N-bis(carboxymethyl) acid
Authors: Mechachti Fatima , Lakehal Salima , Lakehal Aicha , Morell Christophe , Merzoud Lynda , Chermette Henry
Published: September 2021

Structure and selectivity of 3d transition metal complexes with glutamicN,N-bis(carboxymethyl) acid are analyzed and predicted from DFT calculations.
A highly sensitive uric acid biosensor based on vertically arranged ZnO nanorods on a ZnO nanoparticle-seeded electrode
Authors: Nagal Vandana , Kumar Virendra , Khan Marya , AlOmar Suliman Yousef , Tripathy Nirmalya , Singh Kedar , Khosla Ajit , Ahmad Naushad , Hafiz Aurangzeb Khurram , Ahmad Rafiq
Published: September 2021

Vertically-arranged ZnO nanorods grown on a ZnO nanoparticle-seeded FTO electrode using a hydrothermal method for highly sensitive uric acid biosensor fabrication.
Ni(NCS)2 monolayer: a robust bipolar magnetic semiconductor
Authors: Wu Yaxuan , Sun Wei , Liu Siyuan , Wang Bing , Liu Chang , Yin Huabing , Cheng Zhenxiang
Published: September 2021

An Ni(NCS)2 monolayer is a robust bipolar magnetic semiconductor, in which completely spin-polarized currents with reversible spin polarization can be created and controlled simply by applying a gate voltage.
1,2-Bis-perfluoroalkylations of alkenes and alkynes with perfluorocarboxylic anhydridesviathe formation of perfluoroalkylcopper intermediates
Authors: Tagami Takuma , Aoki Yuma , Kawamura Shintaro , Sodeoka Mikiko
Published: September 2021

1,2-Bis-perfluoroalkylations of alkenes/alkynes with perfluorocarboxylic anhydrides.
Dinuclear zinc-catalyzed enantioselective formal [3 + 2] cycloaddition of N-2,2,2-trifluoroethylisatin ketimines with low reactivity aurone derivatives
Authors: Wang Rui-Li , Jia Shi-Kun , Guo Ya-Jun , Yi Yang , Hua Yuan-Zhao , Lu Hui-Jie , Wang Min-Can
Published: September 2021

Highly enantioselective formal [3 + 2] cycloaddition via a Brønsted base and Lewis acid cooperative activation model.
Poly(para-phenylene) ionomer membranes: effect of methyl and trifluoromethyl substituents
Authors: Liu Fanghua , Ahn Jinju , Miyake Junpei , Miyatake Kenji
Published: September 2021

Poly(para-phenylene sulfonic acid) containing CF3 groups exhibits thin membrane forming capability, high proton conductivity, mechanical strength, gas barrier properties, and chemical stability as a proton conductive membrane.
Regio- and stereoselective cobalt-catalyzed hydrosilylation of 1,3-diynes with primary and secondary silanes
Authors: Shen Shaocong , Zong Zhijian , Sun Nan , Hu Baoxiang , Shen Zhenlu , Hu Xinquan , Jin Liqun
Published: September 2021

Reported herein is a well-defined geometry-constrained tridentate NNN-cobalt complex for regio- and stereoselective hydrosilylation of 1,3-diynes.
Synthesis of 2-chromanone-fused [3.2.0] bicycles through a phosphine-mediated tandem [3 + 2] cyclization/intramolecular Wittig reaction
Authors: Fu Junfeng , Tsapy Takia Ingrid Rakielle , Chen Peng , Liu Wei , Jiang Chengjun , Yao Weijun , Zeng Xiaofei , Wang Yongjiang , Han Xiaoyu
Published: September 2021

A phosphine-mediated tandem [3 + 2] cyclization/intramolecular Wittig reaction of alkynone is described. 2-Chromanone-fused bicyclo[3.2.0]heptenones were synthesized in moderate to high yields with remarkably high regio- and diastereoselectivities.
A nanoprecursor method for successfully synthesizing clinoptilolite with high-crystallinity and resultant effects on CO2/CH4 selective adsorption
Authors: Zhai Chengwei , Sun Jihong , Jia Bingying , Gul Anadil , Bai Shiyang
Published: September 2021

Nanoprecursors used as a structural promoter (SP) were prepared by a hydrothermal method and named sol-SP.
Illiciumlignans G–O from the leaves of Illicium dunnianum and their anti-inflammatory activities
Authors: Ma Sen-Ju , Li Hai-Bo , Li Ting , Su Zhen-Zhen , Wang Zhen-Zhong , Yao Xin-Sheng , Xiao Wei , Yu Yang
Published: September 2021

Phytochemical investigations on the dry leaves of Illicium dunnianum have led to the isolation of 24 lignans.
The intrinsic piezoelectric properties of materials – a review with a focus on biological materials
Authors: Lay Ratanak , Deijs Gerrit Sjoerd , Malmström Jenny
Published: September 2021

Piezoelectricity, a linear electromechanical coupling, is of great interest due to its extensive applications including energy harvesters, biomedical, sensors, and automobiles.
Preparation and characterization of sodium alginate–PVA polymeric scaffolds by electrospinning method for skin tissue engineering applications
Authors: Jadbabaei Sorour , Kolahdoozan Majid , Naeimi Farid , Ebadi-Dehaghani Hassan
Published: September 2021

The main aim of this study was to improve the spinnability of SA by adding PVA. The main parameters in producing nanofiber from the optimized SA:PVA ratio, including voltage, flow rate, and working space, were also optimized.
Tuning the mechanical properties of functionally graded nickel and aluminium alloy at the nanoscale
Authors: Mitra Shailee , Rahman Md. Habibur , Motalab Mohammad , Rakib Tawfiqur , Bose Pritom
Published: September 2021

We revealed that the mechanical properties of Ni3Al (homogeneous alloy) could be modulated utilizing functional grading.
Selective and sensitive electrochemical sensors based on an ion imprinting polymer and graphene oxide for the detection of ultra-trace Cd(ii) in biological samples
Authors: Abdallah A. B. , El-kholany Mohamed R. , Molouk A. F. S. , Ali Tamer Awad , El-Shafei A. A. , Khalifa Magdi E.
Published: September 2021

New selective and sensitive electrochemical sensors were designed based on the deposition of a promising ion imprinted polymer (IIP) on the surface of glassy carbon electrode (GCE) for the detection and monitoring of Cd(ii) in different real samples.
Structural investigation of three distinct amorphous forms of Ar hydrate
Authors: Brant Carvalho Paulo H. B. , Moraes Pedro Ivo R. , Leitão Alexandre A. , Andersson Ove , Tulk Chris A. , Molaison Jamie , Lyubartsev Alexander P. , Häussermann Ulrich
Published: September 2021

Three amorphous forms of Ar clathrate hydrate (pressure-amorphized, annealed and recovered) were characterized by isotope substitution (36Ar) neutron diffraction and molecular dynamics and their local coordinations analyzed and compared to pure ice.
Biocidal activity of Ba2+-doped CeO2 NPs against Streptococcus mutans and Staphylococcus aureus bacterial strains
Authors: Sisubalan Natarajan , Karthikeyan Chandrasekaran , Senthil Kumar Venugopal , Varaprasad Kokkarachedu , Haja Hameed Abdulrahman Syed ahamed , Vanajothi Ramar , Sadiku Rotimi
Published: September 2021

The highest antibacterial activity was achieved for Ba-doped CeO2 (BCO) NMs and is suitable for healthcare applications.
Retraction: Magnetic Fe3O4@NiO hierarchical structures: preparation and their excellent As(v) and Cr(vi) removal capabilities
Authors: Zhang Shouwei , Li Jiaxing , Wen Tao , Xu Jinzhang , Wang Xiangke
Published: September 2021

Retraction of ‘Magnetic Fe3O4@NiO hierarchical structures: preparation and their excellent As(v) and Cr(vi) removal capabilities’ by Shouwei Zhang et al., RSC Adv., 2013, 3, 2754–2764, DOI: 10.1039/C2RA22495J.
Cobalt-catalyzed multisubstituted allylation of the chelation-assisted C–H bond of (hetero)arenes with cyclopropenes
Authors: Ramachandran Kuppan , Anbarasan Pazhamalai
Published: September 2021

Cp*CoIII-catalyzed ring-opening isomerization of cyclopropenes to cobalt vinylcarbene has been utilized for the synthesis of multisubstituted allylarenes via directing group-assisted functionalization of C–H bonds of arenes and heteroarenes.
Choosing the right molecular machine learning potential
Authors: Pinheiro Max , Ge Fuchun , Ferré Nicolas , Dral Pavlo O. , Barbatti Mario
Published: September 2021

This article provides a lifeline for those lost in the sea of the molecular machine learning potentials by providing a balanced overview and evaluation of popular potentials.
Highly stretchable, bionic self-healing waterborne polyurethane elastic film enabled by multiple hydrogen bonds for flexible strain sensors
Authors: Zhang Ending , Liu Xiaohong , Liu Yingchun , Shi Jun , Li Xiaobin , Xiong Xiaoyan , Xu Changan , Wu Kun , Lu Mangeng
Published: September 2021

A multi-response flexible wearable strain sensor based on liquid metal and self-healing polyurethane with excellent sensitivity, reliability and durability is able to detect the full range of human motion and can sense stress and temperature.
Insights into light and mass transport in nanoparticle-based aerogels: the advantages of monolithic 3D photocatalysts
Authors: Luna Ana Laura , Papadopoulos Sotirios , Kyburz Till , Tervoort Elena , Novotny Lukas , Niederberger Markus
Published: September 2021

The interest of nanoparticle-based aerogels—3-dimensional (3D) nanoparticle assemblies of macroscopic sizes—in photocatalysis is mainly their versatility for tailoring properties.
Ultrathin metal–organic framework nanosheet arrays and derived self-supported electrodes for overall water splitting
Authors: Wang Yanru , Wang Ani , Xue Zhenzhen , Wang Lei , Li Xiaoyu , Wang Guoming
Published: September 2021

The in situ growth of 2D metal–organic framework (MOF) nanosheet arrays on conductive substrates as self-supported electrodes is highly desirable but challenging.
Synergy of Fe dopants and oxygen vacancies confined in atomically-thin cobaltous oxide sheets for high-efficiency CO2 photoreduction
Authors: Chen Kui , Zhou Sheng , Jiang Tongtong , Li Xiaodong , Yu Jing , Wang Qiuyan , Xu Xiaoliang , Zhu Lixin
Published: September 2021

Based on density functional theory, CoO single-unit-cell layers containing Fe-dopants and O-vacancies were designed and synthesized, demonstrating the importance of the defect synergistic effect on improving the photocatalytic performance of catalysts.
Hollow sphere structured Co3V2O8 as a half-conversion anode material with ultra-high pseudocapacitance effect for potassium ion batteries
Authors: Chen Fei , Wang Shuo , Li Yi-Xuan , Cao Kuo , Chen Chun-Hua
Published: September 2021

A novel hollow sphere structured Co3V2O8 was used for a PIB anode, and the mechanism of potassium ion storage in this HS-Co3V2O8 electrode is determined as a half-conversion reaction combined with pseudocapacitive adsorption.
Computational techniques for characterisation of electrically conductive MOFs: quantum calculations and machine learning approaches
Authors: Zanca Federica , Glasby Lawson T. , Chong Sanggyu , Chen Siyu , Kim Jihan , Fairen-Jimenez David , Monserrat Bartomeu , Moghadam Peyman Z.
Published: September 2021

Computational approaches accelerate design and discovery of conductive metal–organic frameworks (MOFs).
Ammonium sulfate treatment at the TiO2/perovskite interface boosts operational stability of perovskite solar cells
Authors: Muhammad Bening Tirta , Salim Teddy , Bruno Annalisa , Grimsdale Andrew C. , Leong Wei Lin
Published: September 2021

Sulfate functionalization on meso-TiO2 ETL lowers the conduction band level and suppresses the deprotonation of organic cations of the hybrid perovskite at perovskite/ETL interface, resulting in improved operational stability of perovskite solar cells.
Performance limit of monolayer MoSi2N4 transistors
Authors: Sun Xiaotian , Song Zhigang , Huo Nannan , Liu Shiqi , Yang Chen , Yang Jie , Wang Weizhou , Lu Jing
Published: September 2021

The ultra-short gate-length ML MoSi2N4 MOSFET can meet the ITRS requirements with low power dissipation.
Enhancing the energy harvesting performance of PDMS based piezocomposites via a synergistic effect
Authors: Hao Yijin , Hou Yudong , Xu Hui , Gao Xin , Zheng Mupeng , Zhu Mankang
Published: September 2021

Due to the self-supplied energy requirements of wearable electronic devices, flexible piezoelectric energy harvesters (FPEHs) that can convert the vibration energy in the environment into electrical energy have received widespread attention in recent years.
Investigation of sequon engineering for improved O-glycosylation by the human polypeptide N-acetylgalactosaminyl transferase T2 isozyme and two orthologues
Authors: Thompson Nicole K. , LeClaire Leif T. N. , Rodriguez Perez Samantha , Wakarchuk Warren W.
Published: September 2021

We have been developing bacterial expression systems for human mucin-type O-glycosylation on therapeutic proteins, which is initiated by the addition of α-linked GalNAc to serine or threonine residues by enzymes in the GT-27 family of glycosyltransferases. Substrate preference across different isoforms of this enzyme is influenced by isoform-specific amino acid sequences at the site of glycosylation, which we have exploited to engineer production of Core 1 glycan structures in bacteria on human therapeutic proteins. Using RP-HPLC with a novel phenyl bonded phase to resolve intact protein glycoforms, the effect of sequon mutation on O-glycosylation initiation was examined through in vitro modification of the naturally O-glycosylated human interferon α-2b, and a sequon engineered human growth hormone. As part of the development of our glycan engineering in the bacterial expression system we are surveying various orthologues of critical enzymes to ensure complete glycosylation. Here we present an in vitro enzyme kinetic profile of three related GT-27 orthologues on natural and engineered sequons in recombinant human interferon α2b and human growth hormone where we show a significant change in kinetic properties with the amino acid changes. It was found that optimizing the protein substrate amino acid sequence using Isoform Specific O-Glycosylation Prediction (ISOGlyP, http://isoglyp.utep.edu/index.php) resulted in a measurable increase in kcat/KM, thus improving glycosylation efficiency. We showed that the Drosophila orthologue showed superior activity with our human growth hormone designed sequons compared with the human enzyme.
Quantitative characterization of tetraspanin 8 homointeractions in the plasma membrane
Authors: Wirth Daniel , Özdemir Ece , King Christopher , Ahlswede Lena , Schneider Dirk , Hristova Kalina
Published: September 2021

The spatial distribution of proteins in cell membranes is crucial for signal transduction, cell communication and membrane trafficking. Members of the Tetraspanin family organize functional protein clusters within the plasma membrane into so-called Tetraspanin-enriched microdomains (TEMs). Direct interactions between Tetraspanins are believed to be important for this organization. However, studies thus far have utilized mainly co-immunoprecipitation methods that cannot distinguish between direct and indirect, through common partners, interactions. Here we study Tetraspanin 8 homointeractions in living cells via quantitative fluorescence microscopy. We demonstrate that Tetraspanin 8 exists in a monomer-dimer equilibrium in the plasma membrane. Tetraspanin 8 dimerization is described by a high dissociation constant (Kd = 14 700 ± 1100 Tspan8/µm2), one of the highest dissociation constants measured for membrane proteins in live cells. We propose that this high dissociation constant, and thus the short lifetime of the Tetraspanin 8 dimer, is critical for Tetraspanin 8 functioning as a master regulator of cell signaling.
Calpain-2 specifically cleaves Junctophilin-2 at the same site as Calpain-1 but with less efficacy
Authors: Wang Jinxi , Ciampa Grace , Zheng Dong , Shi Qian , Chen Biyi , Abel E. Dale , Peng Tianqing , Hall Duane D. , Song Long-Sheng
Published: September 2021

Calpain proteolysis contributes to the pathogenesis of heart failure but the calpain isoforms responsible and their substrate specificities have not been rigorously defined. One substrate, Junctophilin-2 (JP2), is essential for maintaining junctional cardiac dyads and excitation-contraction coupling. We previously demonstrated that mouse JP2 is cleaved by calpain-1 (CAPN1) between Arginine 565 (R565) and Threonine 566 (T566). Recently, calpain-2 (CAPN2) was reported to cleave JP2 at a novel site between Glycine 482 (G482) and Threonine 483 (T483). We aimed to directly compare the contributions of each calpain isoform, their Ca2+ sensitivity, and their cleavage site selection for JP2. We find CAPN1, CAPN2 and their requisite CAPNS1 regulatory subunit are induced by pressure overload stress that is concurrent with JP2 cleavage. Using in vitro calpain cleavage assays, we demonstrate that CAPN1 and CAPN2 cleave JP2 into similar 75 kD N-terminal (JP2NT) and 25 kD C-terminal fragments (JP2CT) with CAPNS1 co-expression enhancing proteolysis. Deletion mutagenesis shows both CAPN1 and CAPN2 require R565/T566 but not G482/T483. When heterologously expressed, the JP2CT peptide corresponding to R565/T566 cleavage approximates the 25 kD species found during cardiac stress while the C-terminal peptide from potential cleavage at G482/T483 produces a 35 kD product. Similar results were obtained for human JP2. Finally, we show that CAPN1 has higher Ca2+ sensitivity and cleavage efficacy than CAPN2 on JP2 and other cardiac substrates including cTnT, cTnI and β2-spectrin. We conclude that CAPN2 cleaves JP2 at the same functionally conserved R565/T566 site as CAPN1 but with less efficacy and suggest heart failure may be targeted through specific inhibition of CAPN1.
Personality in Children With Vocal Fold Nodules: A Multitrait Analysis
Authors: Lee Jeong Min , Roy Nelson , Park Albert , Muntz Harlan , Meier Jeremy , Skirko Jonathan , Smith Marshall
Published: September 2021

Purpose

Vocal fold nodules (VNs) are bilateral, symmetrical, callous-like lesions secondary to phonotrauma and possibly related to specific personality traits. This case–control study examined the relation between personality and VNs in children within the context of the Trait Theory of VNs.

Method

Parents of children with VNs (
N
= 39,
M
= 7.43,
SD
= 2.01 years) and two medical control groups (i.e., voice disordered controls, but not VNs [VDCs;
N
= 40,
M
= 7.09,
SD
= 2.01 years] and vocally normal controls [VNCs;
N
= 40,
M
= 7.6,
SD
= 1.54 years]) completed the Inventory of Child Individual Differences, a personality instrument that describes the Big Five superfactors as well as 15 lower order personality traits.

Results

Children with VNs, as compared with VNCs, were (a) emotionally reactive (i.e., higher N—Neuroticism,
p
< .005, Cohen's
d
= 0.53), (b) Antagonistic, Strong-Willed, and less Compliant (i.e., lower A—Agreeableness,
p
< .014, Cohen's
d
= 0.59), and (c) Distractible and Disorganized (i.e., lower C—Conscientiousness,
p
< .009, Cohen's
d
= 0.62). Both voice disordered groups displayed elevated scores on the personality superfactor of Neuroticism (N; and the “Negative Emotions” lower order trait).

Conclusions

The combination of personality traits identified in this study (i.e., high N, low A and C) may play a central role in VNs development and possibly attenuate voice therapy success. Children with VNs displayed a similar personality typology as women with VNs, with the exception of elevated Extraversion (E), thereby providing support for the relevance of the Trait Theory of VNs in both children and adults. Clinicians treating children with voice disorders, including VNs, should consider their underlying personality traits in assessment and management.
Syncing Our Global Thinking: A Framework for Contextualized Clinical Reasoning
Authors: Pillay Thiani , Pillay Mershen
Published: September 2021

Purpose

Globally, health care practitioners (HCPs) practice in a variety of settings. To account for the diversity of these contexts, HCPs should utilize dynamic clinical reasoning skills to provide contextually responsive services that account for the complexities of patients, clinicians, and their surroundings. However, traditional models of clinical reasoning approach this skill in a reductionistic and segmented manner that ignores the impact of these diverse factors in health care provision. This makes it very difficult to reconcile these models with the realities of practice.

Method

By repositioning clinical reasoning as a unique and dynamic skill and identifying the shortcomings of traditional clinical reasoning models, we suggest a novel theoretical framework:contextualized clinical reasoning, which centralizes factors related to context and individual within its approach.

Conclusions

In order to practice clinical reasoning in an authentic manner that recognizes the impact of contextual and personal realities, we put forward thecontextualized clinical reasoningframework. This framework gives HCPs the tools needed to change the rhetoric on best practice and provide effective health care services that account for complexity and diversity of health care contexts globally.
An efficient multi‐sensor fusion and tracking protocol in a vehicle‐road collaborative system
Authors: Xu Zhehan , Zhao Shengjie , Zhang Rongqing
Published: September 2021

Nowadays, driving safety has become an important topic in the field of intelligent driving. The key step in the intelligent transportation system (ITS) is to detect and track the vehicles on the road through various sensors equipped on the vehicle. While putting the sensors aside the road can have benefits in the vehicle‐road collaborative scenario. In this paper, an efficient and applicable multi‐sensor fusion protocol for a vehicle‐road collaborative system is proposed where roadside units (RSUs) are equipped with cameras and radars. To fully use the history information and the multi‐source heterogeneous sensing data to improve the reliability of multi‐sensor fusion, a Bayesian‐based two‐layer fusion scheme is further proposed. Moreover, the efficiency and robustness of the proposed scheme are evaluated in a real highway environment in Changsha, China.
Preventing congestion control oscillation in cellular vehicular communication
Authors: Park Yongtae , Kim Hyogon
Published: September 2021

The standard cellular vehicular communication uses channel utilization as the input to the congestion control. When its measurement period is identical to the application messaging interval, oscillation and unfairness problems can arise. The exponential weighted moving average with random noise for the measured channel utilization can be used to prevent the problems.
Control of pico‐hydro‐PV‐based distributed generation with battery support for off‐grid electrification
Authors: Chandran Vineet P. , Singh Bhim
Published: September 2021

This work presents the operation and control of a pico‐hydro‐solar photovoltaic (PV)‐battery energy storage (BES)‐based isolated renewable energy system (RES) feeding 3‐phase 4‐wire loads. For voltage regulation, to maintain frequency, and power quality improvement in this system, a 4‐leg VSC is used. The BES is connected to the DC‐link of the voltage source converter (VSC) through a bidirectional converter (BDC), which regulates the DC‐link voltage and controls the charging and discharging current of the battery. An advanced perturb and observe (AP&O)‐based MPPT control technique with drift free operation and capability to operate in the derated mode is adapted in this work. The VSC connected to PCC, injects or absorbs power from this system based on the difference of power between generation and the load. The modified complex co‐efficient filter (MCCF)‐based control technique monitors the power quality of this RES system and 4 leg VSC provides the source neutral current compensation. This control algorithm is used to extract the amplitude of the fundamental load current component with improved dynamic response, DC offset elimination and higher order harmonics removal capability. The ability of the presented control strategy for power quality improvement, power management, load balancing and neutral current compensation is reported in this work.
Fault current compensations in resonant grounded distribution systems to mitigate powerline bushfires using a nonsingular terminal sliding model controller
Authors: Roy Tushar Kanti , Mahmud Md Apel
Published: September 2021

A fault current compensation technique is proposed in this paper for resonant grounded power distribution systems in bushfire prone areas. Arc suppression devices with residual current compensation inverters are used to compensate fault currents due to single line‐to‐ground faults in order to mitigate powerline bushfires. The main contribution of this paper is the design of a compensation technique for the T‐type residual current compensation inverter using a non‐singular terminal sliding mode control scheme. The main objective of the proposed scheme is to reduce the fault current and bring its value to a level so that it cannot ignite fires. The proposed controller is designed based on the selection of a sliding surface in a way the singularity problem can be avoided and chattering effects in existing sliding mode controllers can be eliminated. The desired current injection through the residual current compensation inverter is ensured by enforcing the control law into the terminal sliding surface where the control law is determined by satisfying the Lyapunov stability criteria. The performance of the non‐singular terminal sliding mode controller is compared with an integral sliding mode controller by considering different values of fault currents where these values are varied by changing fault resistances. Results for simulation in the software and processor‐in‐loop simulations are verified against operational standards which are essential for mitigating powerline bushfires. This work focuses to design a non‐singular terminal sliding mode controller for the residual current compensation inverter which is used in an arc suppression device to compensate both active and reactive components of the fault current and keeps its value below 0.5 A within 2 s after activating the residual current compensation inverter which is a requirement as per the operational standard. This controller is designed based on the selection of a terminal sliding surface while satisfying the condition for avoiding the singularity problem.
Application research on the adsorption of Cu2+ ions in wastewater by hydroxyl‐ or amino‐terminated polyamines
Authors: Wang Minghua , Qu Rongjun , Cai Honglan , Qiao Qingan , Zhang Jiang
Published: September 2021

The adsorption properties of hydroxyl‐ or amino‐terminated polyamines for Cu2+ ions are studied in detail by adopting the batch method, and the effects of main imprinting conditions, such as the concentrations of Cu2+ ions, temperature, pH and the amount of N are examined. The results showed that adsorption capacity increased with the increase of the number of N in the functional groups. The kinetic of the reaction is very rapid and follows the pseudo‐second order and clearly indicated that both the Langmuir and Freundlich models could describe the Cu2+ ions adsorption on aminated mesoporous materials well. Hence, the reported mesoporous materials herein hold great potential to remove Cu2+ ions from aqueous solutions.
Soft‐switching non‐isolated high step‐up three‐level boost converter using single magnetic element
Authors: Jazi Hamed Moradmand , Fekri Mahmoud , Keshani Milad , Khorasani Ramin Rahimzadeh , Adib Ehsan , Wheeler Patrick , Garcia Herminio‐Martinez , Velasco‐Quesada Guillermo
Published: September 2021

Here, a soft switched three‐level boost converter with high voltage gain is proposed which is suitable for high step‐up applications with wide output power range. In this converter, a ZVT auxiliary circuit is used which provides soft switching in a wide range of output power independent of load variation. Utilizing coupled‐inductors with one magnetic core removes extra auxiliary core in the soft switching circuit and provides high voltage gain in conjunction with size reduction. Also, the secondary and tertiary leakage inductances of the coupled‐inductors minimize the reverse recovery problem of the output diodes. Due to its three‐level structure, it has very low voltage stress over semiconductor elements in comparison to the existing interleaved structures, resulting in using MOSFETs with low on‐resistance and thus lower conduction losses and cost. Operating modes as well as analytical analysis of the proposed converter are discussed. Finally, in order to validate the proposed converter performance, experimental results from a 200‐W laboratory prototype are presented.
Optimised disjoint virtual backbone algorithms for wireless sensor networks
Authors: Obenofunde Simon T. , Togni Olivier , Abdou Wahabou
Published: September 2021

The way nodes are arranged in a wireless network can significantly influence performance, especially information flow. The construction of disjoint virtual backbone networks (DVBNs) is one of the ways this can be accomplished. In this study, the authors first present a proposal that constructs multiple DVBNs using nodes' locations, in two phases. In the second phase of the proposal, dominator selection is initiated by the sink and then continued by each selected dominator. This occurs in rounds, with each round producing a distinct virtual backbone. The simulations show that multiple DVBNs can be produced with a good approximation ratio. Further, two optimisations are presented, one for a scanty network and the other for data dissemination. These are accomplished by changing the way in which the dominators are selected in the second phase of the algorithm. These optimisations are evaluated and a marked improvement is observed in node connectedness to the backbone and in hop count while keeping approximation ratios almost constant.
Fossil group origins
Authors: Zarattini S. , Biviano A. , Aguerri J. A. L. , Girardi M. , D’Onghia E.
Published: September 2021

Aims. We aim to study how the orbits of galaxies in clusters depend on the prominence of the corresponding central galaxies.

Methods. We divided our data set of ∼100 clusters and groups into four samples based on their magnitude gap between the two brightest members, Δm12. We then stacked all the systems in each sample in order to create four stacked clusters and derive the mass and velocity anisotropy profiles for the four groups of clusters using the MAMPOSSt procedure. Once the mass profile is known, we also obtain the (non-parametric) velocity anisotropy profile via the inversion of the Jeans equation.

Results. In systems with the largest Δm12, galaxy orbits are generally radial, except near the centre, where orbits are isotropic (or tangential when also the central galaxies are considered in the analysis). In the other three samples with smaller Δm12, galaxy orbits are isotropic or only mildly radial.

Conclusions. Our study supports the results of numerical simulations that identify radial orbits of galaxies as the cause of an increasing Δm12 in groups.
Velocity dispersion and dynamical mass for 270 galaxy clusters in thePlanckPSZ1 catalogue
Authors: Ferragamo A. , Barrena R. , Rubiño-Martín J. A. , Aguado-Barahona A. , Streblyanska A. , Tramonte D. , Génova-Santos R. T. , Hempel A. , Lietzen H.
Published: September 2021

We present the velocity dispersion and dynamical mass estimates for 270 galaxy clusters included in the firstPlanckSunyaev-Zeldovich (SZ) source catalogue, the PSZ1. Part of the results presented here were achieved during a two-year observational program, the ITP, developed at the Roque de los Muchachos Observatory (La Palma, Spain). In the ITP we carried out a systematic optical follow-up campaign of all the 212 unidentified PSZ1 sources in the northern sky that have a declination above −15° and are without known counterparts at the time of the publication of the catalogue. We present for the first time the velocity dispersion and dynamical mass of 58 of these ITP PSZ1 clusters, plus 35 newly discovered clusters that are not associated with the PSZ1 catalogue. Using Sloan Digital Sky Survey archival data, we extend this sample, including 212 already confirmed PSZ1 clusters in the northern sky. Using a subset of 207 of these galaxy clusters, we constrained theMSZ–Mdynscaling relation, finding a mass bias of (1 − B) = 0.83 ± 0.07(stat) ± 0.02(sys). We show that this value is consistent with other results in the literature that were obtained with different methods (X-ray, dynamical masses, or weak-lensing mass proxies). This result cannot dissolve the tension between primordial cosmic microwave background anisotropies and cluster number counts in the ΩM–σ8plane.
The eROSITA Final Equatorial-Depth Survey (eFEDS)
Authors: Boller Th. , Schmitt J. H. M. M. , Buchner J. , Freyberg M. , Georgakakis A. , Liu T. , Robrade J. , Merloni A. , Nandra K. , Malyali A. , Krumpe M. , Salvato M. , Dwelly T.
Published: September 2021

The 140-square-degrees Final Equatorial-Depth Survey (eFEDS) field, observed with the extended ROentgen Survey with an Imaging Telescope Array (eROSITA) on board the Spectrum-Roentgen-Gamma mission, provides a first look at the variable eROSITA sky. We analysed the intrinsic X-ray variability of the eFEDS sources and provide X-ray light curves and tables with variability test results in the 0.2–2.3 keV (soft) and 2.3–5.0 keV (hard) bands. We performed variability tests using the traditional normalised excess variance and maximum amplitude variability methods (as performed for the 2RXS catalogue), and we present results from the Bayesian excess variance and Bayesian block methods. We identified 65 sources as being significantly variable in the soft band. In the hard band, only one source is found to vary significantly. For the most variable sources, the light curves are well fit by an empirical stellar flare model and reveal extreme flare properties. A few highly variable active galactic nuclei have also been detected. About half of the variable eFEDS sources are detected in the X-rays for the first time with eROSITA. Comparison with 2RXS andXMM-Newtonobservations provides variability information on timescales of years to decades.
SOLIS
Authors: Codella C. , Bianchi E. , Podio L. , Mercimek S. , Ceccarelli C. , López-Sepulcre A. , Bachiller R. , Caselli P. , Sakai N. , Neri R. , Fontani F. , Favre C. , Balucani N. , Lefloch B. , Viti S. , Yamamoto S.
Published: September 2021

Context. Recent results in astrochemistry have revealed that some molecules, such as interstellar complex organic species and deuterated species, can serve as valuable tools in the investigation of star-forming regions. Sulphuretted species can also be used to follow the chemical evolution of the early stages of a Sun-like star formation process.

Aims. The goal is to obtain a census of S-bearing species using interferometric images towards SVS13-A, a Class I object associated with a hot corino that is rich in interstellar complex organic molecules.

Methods. To this end, we used the NGC 1333 SVS13-A data at 3 mm and 1.4 mm obtained with the IRAM-NOEMA interferometer in the framework of the SOLIS (Seeds of Life in Space) Large Program. The line emission of S-bearing species was imaged and analyzed using local thermodynamic equilibrium (LTE) and large velocity gradient (LVG) approaches.

Results. We imaged the spatial distribution on ≤300 au scale of the line emission of 32SO, 34SO, C32S, C34S, C33S, OCS, H2C32S, H2C34S, and NS. The low excitation (9 K) 32SO line traces: (i) the low-velocity SVS13-A outflow and (ii) the fast (up to 100 km s−1 away from the systemic velocity) collimated jet driven by the nearby SVS13-B Class 0 object. Conversely, the rest of the lines are confined in the inner SVS13-A region, where complex organics were previously imaged. More specifically, the non-LTE LVG analysis of SO, SO2, and H2CS indicates a hot corino origin (size in the 60–120 au range). Temperatures between 50 K and 300 K, as well as volume densities larger than 105 cm−3 have been derived. The abundances of the sulphuretted are in the following ranges: 0.3–6 × 10−6 (CS), 7 × 10−9–1 × 10−7 (SO), 1–10 × 10−7 (SO2), a few 10−10 (H2CS and OCS), and 10−10–10−9 (NS). The N(NS)/N(NS+) ratio is larger than 10, supporting the assessment that the NS+ ion is mainly formed in the extended envelope.

Conclusions. The [H2CS]/[H2CO] ratio, once measured at high-spatial resolutions, increases with time (from Class 0 to Class II objects) by more than one order of magnitude (from ≤10−2 to a few 10−1). This suggests that [S]/[O] changes along the process of Sun-like star formation. Finally, the estimate of the [S]/[H] budget in SVS13-A is 2–17% of the Solar System value (1.8 × 10−5), which is consistent with what was previously measured towards Class 0 objects (1–8%). This finding supports the notion that the enrichment of the sulphuretted species with respect to dark clouds remains constant from the Class 0 to the Class I stages of low-mass star formation. The present findings stress the importance of investigating the chemistry of star-forming regions using large observational surveys as well as sampling regions on the scale of the Solar System.
Reconstructing solar irradiance from historical Ca II K observations
Authors: Chatzistergos Theodosios , Krivova Natalie A. , Ermolli Ilaria , Yeo Kok Leng , Mandal Sudip , Solanki Sami K. , Kopp Greg , Malherbe Jean-Marie
Published: September 2021

Context.Knowledge of solar irradiance variability is critical to Earth’s climate models and understanding the solar influence on Earth’s climate. Direct solar irradiance measurements have only been available since 1978. Reconstructions of past variability typically rely on sunspot data. However, sunspot records provide only indirect information on the facular and network regions, which are decisive contributors to irradiance variability on timescales of the solar cycle and longer.

Aims.Our ultimate goal is to reconstruct past solar irradiance variations using historical full-disc Ca IIK observations to describe the facular contribution independently of sunspot observations. Here, we develop the method and test it extensively by using modern CCD-based (charge-coupled device) Ca IIK observations. We also carry out initial tests on two photographic archives.

Methods.We employ carefully reduced and calibrated Ca IIK images from 13 datasets, including some of the most prominent series, such as those from the Meudon, Mt Wilson, and Rome observatories. We convert them to unsigned magnetic field maps and then use them as input to the adapted Spectral and Total Irradiance Reconstruction (SATIRE) model to reconstruct total solar irradiance (TSI) variations over the period 1978–2019, for which direct irradiance measurements are available.

Results.The reconstructed irradiance from the analysed Ca IIK archives agrees well with direct irradiance measurements and existing reconstructions. The model also returns good results on data taken with different bandpasses and images with low spatial resolution. Historical Ca IIK archives suffer from numerous inconsistencies, but we show that these archives can still be used to reconstruct TSI with reasonable accuracy provided the observations are accurately processed and the effects of changes in instrumentation and instrumental parameters are identified and accounted for. The reconstructions are relatively insensitive to the TSI reference record used to fix the single free parameter of the model. Furthermore, even employment of a series, itself reconstructed from Ca IIK data, as a reference for further reconstructions returns nearly equally accurate results. This will enable the Ca IIK archives without an overlap with direct irradiance measurements to be used to reconstruct past irradiance.

Conclusions.By using the unsigned magnetic maps of the Sun reconstructed from modern high-quality Ca IIK observations as input into the SATIRE model, we can reconstruct solar irradiance variations nearly as accurately as from directly recorded magnetograms. Historical Ca IIK observations can also be used for past irradiance reconstructions but need additional care, for example identifying and accounting for discontinuities and changes in the quality of the data with time.