bluuebunny/crossref_metadata_2025 huggingface dataset:
Iron-promoted free radical cascade difunctionalization of unsaturated benzamides with silanes
Authors: Ge Yaxin , Tian Yunfei , Wu Jilai , Yan Qinqin , Zheng Luping , Ren Yingming , Zhao Jincan , Li Zejiang
Published: September 2020

An efficient cascade difunctionalization of unsaturated benzamides with silanes was developed for the synthesis of various silylated dihydroisoquinolinones and 1,3-isoquinolinediones.
Double aromaticity in a BBe6H6+cluster with a planar hexacoordinate boron structure
Authors: Kalita Amlan J. , Rohman Shahnaz S. , Kashyap Chayanika , Ullah Sabnam S. , Guha Ankur K.
Published: September 2020

Aromaticity is one of the central concepts in chemistry and stabilizes many clusters that have interesting structural motifs.
A highly stable octa-coordinated energetic complex
Authors: Tong Wenchao , Bian Mei , Feng Yongan , Zhang Tonglai , Hu Shuangqi , Yang Li
Published: September 2020

The first octa-coordinated energetic material with excellent thermal stability based on transition metal Cd was reported.
Dynamic coupling of a hydration layer to a fluid phospholipid membrane: intermittency and multiple time-scale relaxations
Authors: Srivastava Abhinav , Malik Sheeba , Karmakar Smarajit , Debnath Ananya
Published: September 2020

Understanding the coupling of a hydration layer and a lipid membrane is crucial to gaining access to membrane dynamics and understanding its functionality towards various biological processes.
Catalytic addition of C–H bonds across C–C unsaturated systems promoted by iridium(i) and its group IX congeners
Authors: Fernández David F. , Mascareñas José L. , López Fernando
Published: September 2020

We summarized the most relevant advances in Ir-catalyzed hydrocarbonation reactions, highlighting their differences with related methods promoted by their group IX congeners, Rh and Co.
Pt- and K-promoted supported gallia as a highly stable alternative catalyst for isobutane dehydrogenation
Authors: Matveyeva Anna N. , Zaitseva Nadezhda A. , Pakhomov Nikolai A. , Murzin Dmitry Yu.
Published: September 2020

Gallia/alumina promoted with tiny amounts of Pt and K exhibits superior stability in butane dehydrogenation compared to commercial catalysts.
Rh–M (M: Co, Cu, and Fe) nanoclusters as highly efficient and durable catalysts for the methanolysis of ammonia borane
Authors: Abay Bayram , Rakap Murat
Published: September 2020

Herein, we report the preparation, characterization, and employment of hydroxyapatite-supported rhodium-based Rh–M (RhCo, RhCu, and RhFe) nanoclusters as cost-effective, highly efficient and reusable catalysts for hydrogen evolution from ammonia borane methanolysis.
Structure, polymorphism and luminescence of cyanate iodides MI(OCN) (M = Ba, Eu, and Sr)
Authors: Siai Amira , Hämmerle Luzian , Ströbele Markus , Enseling David , Jüstel Thomas , Meyer Hans-Jürgen
Published: September 2020

Solid-state synthesis of new compounds MI(OCN) (M = Sr, Eu and Ba). Investigation of the photoluminescence of Eu2+-doped SrI(OCN) and BaI(OCN).
The metabolic dysfunction of white adipose tissue induced in mice by a high-fat diet is abrogated by co-administration of docosahexaenoic acid and hydroxytyrosol
Authors: Illesca Paola , Valenzuela Rodrigo , Espinosa Alejandra , Echeverría Francisca , Soto-Alarcón Sandra , Ortiz Macarena , Campos Cristian , Vargas Romina , Videla Luis A.
Published: September 2020

The DHA plus HT combined protocol prevents WAT alterations induced by a high-fat diet in mice. Main related mechanisms.
Biocompatible ionic liquids and their applications in pharmaceutics
Authors: Md Moshikur Rahman , Chowdhury Md. Raihan , Moniruzzaman Muhammad , Goto Masahiro
Published: September 2020

This critical review highlights the recent advancements of using biocompatible ionic liquids as “green” designer solvents and/or materials to overcome the limitations caused by conventional organic solvents/materials in pharmaceutics and medicine.
A novel sample delivery system based on circular motion for in situ serial synchrotron crystallography
Authors: Zhao Feng-Zhu , Sun Bo , Yu Li , Xiao Qing-Jie , Wang Zhi-Jun , Chen Liang-Liang , Liang Huan , Wang Qi-Sheng , He Jian-Hua , Yin Da-Chuan
Published: September 2020

A microfluidic rotating-target sample delivery device based on circular motion for in situ serial crystallography is presented, which combines the advantages of circular motion, microfluidic technology and in situ diffraction.
Properties and bioeffects of magneto–near infrared nanoparticles on cancer diagnosis and treatment
Authors: Ha Phuong Thu , Le Thi Thu Huong , Ung Thi Dieu Thuy , Do Hai Doan , Doan Bich Thuy , Mai Thi Thu Trang , Pham Hong Nam , Hoang Thi My Nhung , Phan Ke Son , Bui Thuc Quang
Published: September 2020

The developed nanosystem could be an effective cancer drug deliverer, MRI contrast enhancer and near infrared fluorescent probe.
Selectively accessing the hotspots of optical nanoantennas by self-aligned dry laser ablation
Authors: Schäfer Christian , Perera Pradeep N. , Laible Florian , Olynick Deirdre L. , Schwartzberg Adam M. , Weber-Bargioni Alexander , Cabrini Stefano , Schuck P. James , Kern Dieter P. , Fleischer Monika
Published: September 2020

Self-aligned laser ablation is demonstrated to selectively access the nano-volumes of high near-field enhancement at nanoantenna tips for functionalization.
Photo-induced 1,2-carbohalofunctionalization of C–C multiple bonds via ATRA pathway
Authors: Bag Debojyoti , Kour Harpreet , Sawant Sanghapal D.
Published: September 2020

Carbohalofunctionalization of C–C multiple bonds via atom transfer radical processes constitutes an efficient method for the construction of halogenated building blocks with complete atom economy. This review summarizes the recent advancements.
Correction: Tandem Prins cyclization for the synthesis of indole fused spiro-1,4-diazocane scaffolds
Authors: Rapelli Chandrashekhar , Sridhar Balasubramanian , Subba Reddy B. V.
Published: September 2020

Correction for ‘Tandem Prins cyclization for the synthesis of indole fused spiro-1,4-diazocane scaffolds’ by Chandrashekhar Rapelli et al., Org. Biomol. Chem., 2020, 18, 6710–6715, DOI: 10.1039/D0OB01384F.
Kinetic modeling study of the group-transfer polymerization of alkyl crotonates using a silicon Lewis acid catalyst
Authors: Imada Motosuke , Takenaka Yasumasa , Tsuge Takeharu , Abe Hideki
Published: September 2020

Kinetic modeling is effective in the development of efficient and manageable polymerization systems.
Saccharin-pendant methacrylamide as a unique monomer in radical copolymerization: peculiar alternating copolymerization with styrene
Authors: Kametani Yuki , Ouchi Makoto
Published: September 2020

A saccharin metharylamide was found to uniquely induce alternating copolymerization with styrene.
Integration of fluorescent probes into metal–organic frameworks for improved performances
Authors: Li Huihui , Yang Weiting , Pan Qinhe
Published: September 2020

This review surveyed the research works for the regulation of fluorescent probes with metal–organic frameworks based on host–guest chemistry.
Recent advances in liquid hydrosilane-mediated catalytic N-formylation of amines with CO2
Authors: Li Zhengyi , Yu Zhaozhuo , Luo Xiaoxiang , Li Chuanhui , Wu Hongguo , Zhao Wenfeng , Li Hu , Yang Song
Published: September 2020

This review depicts different types of catalyst systems developed for upgrading of amines and carbon dioxide into N-formylated products in the presence of hydrosilane, with attention on reaction mechanism and process optimization.
Metallic bands in chevron-type polyacenes
Authors: Kher-Elden Mohammed A. , Piquero-Zulaica Ignacio , Abd El-Aziz Kamel M. , Ortega J. Enrique , Abd El-Fattah Zakaria M.
Published: September 2020

We present electronic structure calculations based on a single-parameter plane wave expansion method for molecular nanostructures revealing excellent agreement with density functional theory and predicting metallic bands for chevron molecular dimers.
A redox-active support for the synthesis of Au@SnO2 core–shell nanostructure and SnO2 quantum dots with efficient photoactivities
Authors: Pan Xiaoyang , Chen Wen-Jie , Cai Huizhen , Li Hui , Sun Xue jiao , Weng Bo , Yi Zhiguo
Published: September 2020

A defect pyrochlore-type Sn1.06Nb2O5.59F0.97 nano-octahedron is used as a redox-active support for the fabrication of Au@SnO2 core–shell structure and SnO2 quantum dots.
DOX sensitized upconversion metal–organic frameworks for the pH responsive release and real-time detection of doxorubicin hydrochloride
Authors: Tian Feng , Xu Chen , Xu Mingyue , Gao Haiqing , Xiao Ziyi , Li Ling , Wang Yingxi
Published: September 2020

Drug resistance is a major obstacle in cancer treatment, and designing a material that monitors real-time drug release remains a top priority.
Correction: Recent advances in the methanol synthesis via methane reforming processes
Authors: Rashid Muhammad Usman , Wan Daud W. M. A.
Published: September 2020

Correction for ‘Recent advances in the methanol synthesis via methane reforming processes’ by Muhammad Usman Rashid et al., RSC Adv., 2015, 5, 21945–21972, DOI: 10.1039/C4RA15625K.
Correction: Microemulsion based synthesis of Ni/MgO catalyst for dry reforming of methane
Authors: Rashid Muhammad Usman , Daud W. M. A. Wan
Published: September 2020

Correction for ‘Microemulsion based synthesis of Ni/MgO catalyst for dry reforming of methane’ by Muhammad Usman et al., RSC Adv., 2016, 6, 38277–38289, DOI: 10.1039/C6RA01652A.
Correction: An investigation on the influence of catalyst composition, calcination and reduction temperatures on Ni/MgO catalyst for dry reforming of methane
Authors: Rashid Muhammad Usman , Wan Daud W. M. A.
Published: September 2020

Correction for ‘An investigation on the influence of catalyst composition, calcination and reduction temperatures on Ni/MgO catalyst for dry reforming of methane’ by Muhammad Usman Rashid et al., RSC Adv., 2016, 6, 91603–91616, DOI: 10.1039/C6RA15256B.
Revealing the relationship between photoelectrochemical performance and interface hole trapping in CuBi2O4 heterojunction photoelectrodes
Authors: Song Angang , Levine Igal , van de Krol Roel , Dittrich Thomas , Berglund Sean P.
Published: September 2020

CdS, BiVO4, and Ga2O3 buffer layers were tested between CuBi2O4 and TiO2 in heterojunction photoelectrodes. Photoelectrochemical analysis and modulated surface photovoltage spectroscopy revealed that interface hole traps impacted device performance.
Reversible switching between positive and negative thermal expansion in a metal–organic framework DUT-49
Authors: Garai Bikash , Bon Volodymyr , Efimova Anastasia , Gerlach Martin , Senkovska Irena , Kaskel Stefan
Published: September 2020

Reversible switching between positive and negative thermal expansion of a mesoporous metal-organic framework DUT-49 has been demonstrated and studied by synchrotron single-crystal X-ray diffraction with different guest molecules in the pores.
The effect of nanoscaffold porosity and surface chemistry on the Li-ion conductivity of LiBH4–LiNH2/metal oxide nanocomposites
Authors: de Kort Laura M. , Harmel Justine , de Jongh Petra E. , Ngene Peter
Published: September 2020

Tuning the ionic conductivity of LiBH4–LiNH2/oxide nanocomposites by controlling the surface chemistry as well as the porosity of the metal oxide nanoscaffold materials.
Correction: Enhancing the selectivity of Nafion membrane by incorporating a novel functional skeleton molecule to improve the performance of direct methanol fuel cells
Authors: Li Jialin , Bu Fanzhe , Ru Chunyu , Jiang Hao , Duan Yuting , Sun Yinan , Pu Xingtong , Shang Lichao , Li Xifang , Zhao Chengji
Published: September 2020

Correction for ‘Enhancing the selectivity of Nafion membrane by incorporating a novel functional skeleton molecule to improve the performance of direct methanol fuel cells’ by Jialin Li et al., J. Mater. Chem. A, 2020, 8, 196–206, DOI: 10.1039/C9TA10215A.
Permalloy/polydimethylsiloxane nanocomposite inks for multimaterial direct ink writing of gigahertz electromagnetic structures
Authors: Shi Qikun , Chen Hehao , Pang Kaixuan , Yao Yuan , Su Guodong , Liang Feng , Zhou Nanjia
Published: September 2020

The multimaterials printing procedure of solenoidal inductor with a magnetic core.
Hydrogen doping in wide-bandgap amorphous In–Ga–O semiconductors
Authors: Medvedeva Julia E. , Bhattarai Bishal
Published: September 2020

Microscopic mechanisms of the formation of H defects and their role in passivation of under-coordinated atoms, short- and long-range structural transformations, and the resulting electronic properties of amorphous In–Ga–O with In : Ga = 6 : 4 are investigated using computationally-intensive ab initio molecular dynamics simulations and accurate density-functional calculations.
Thermoelectric power factor exceeding 50 μW m−1 K−2 from water-borne colloids of polymer semiconductors
Authors: Nam Geon-Hee , Ha Jae Un , Chung Dae Sung
Published: September 2020

Water processed organic thermoelectrics were fabricated which attained a power factor exceeding 50 μW m−1 K−2 by optimizing dialysis time.
Elaboration d’une fiche d’évaluation du stage clinique en médecine de famille : processus et résultat
Authors: Codsi Marie-Pierre , Sanche Gilbert , Authier Louise , Robert Diane , D’Aoust Louis-Xavier , Duplain Réjean , Fernandez Nicolas
Published: September 2020

Contexte : Depuis l’implantation de l’approche par compétences en formation médicale, divers établissements dans le monde implantent des outils pour évaluer le progrès et les niveaux de maîtrise des compétences. Objectif : Décrire le processus d’élaboration collectif de la fiche d’appréciation du stage clinique (FASC) en médecine de famille et présenter son résultat. Cette fiche relie les activités professionnelles confiables (APC) et les compétences requises pour les réaliser. Méthode : Un groupe de travail mandaté par la direction universitaire du programme, de concert avec les 18 directeurs locaux de programme (DLP) dans les centres où se déroule la formation des résidents, a validé une liste d’APC par sondage. Dans un deuxième temps, lors d’une journée d’atelier, 47 participants (enseignants et DLP) ont décrit les niveaux de maîtrise à observer chez les résidents pour chaque APC. Résultats : Les travaux ont mené à la création d’une nouvelle FASC et d’un Guide de notation qui permettent d’évaluer 11 APC et les 7 compétences reconnues au Canada. L’appréciation des APC se base sur la confiance des enseignants envers le travail des résidents. Cinq « niveaux de confiance dans la délégation de responsabilité » (NiCDeR) ont été définis pour les principales compétences sollicitées par chaque APC. Conclusion : L’utilisation d’un processus de co-construction a permis d’augmenter la validité et la pertinence d’une nouvelle fiche d’évaluation des stages cliniques en médecine de famille et de favoriser son appropriation par les cliniciens-enseignants du programme.
Subgruppierung bei patellofemoralem Schmerz sinnvoll
Authors: Vielitz Arne
Published: September 2020

Yosmaoğlu HB, Selfe J, Sonmezer E et al. Targeted Treatment Protocol in Patellofemoral Pain: Does Treatment Designed According to Subgroups Improve Clinical Outcomes in Patients Unresponsive to Multimodal Treatment? Sports Health 2020; 12: 170–180. doi: 10.1177/1941738119883272
Einbein-Sprungtests sind zuverlässig
Authors: Vielitz Arne
Published: September 2020

Dingenen B, Truijen J, Bellemans j et al. Test-Retest Reliability and Discriminative Ability of Forward, Medial and Rotational Single-Leg Hop Tests. Knee 2019; 26: 978–987. doi: 10.1016/j.knee.2019.06.010
Ein Sicherheitsnetz für Patienten in Zeiten von COVID-19
Authors: Vielitz Arne
Published: September 2020

Greenhalgh S, Finucane LM, Mercer C et al. Safety Netting; Best Practice in the Face of Uncertainty. Musculoskelet Sci Pract 2020; 48: 102179. doi: 10.1016/j.msksp.2020.102179
Surgical Treatment for Crohn's Disease: A Role of Kono-S Anastomosis in the West
Authors: Kono Toru , Fichera Alessandro
Published: September 2020

More than 80% of patients with Crohn's disease (CD) will require surgical intervention during their lifetime, with high rates of anastomotic recurrence and stenosis necessitating repeat surgery. Current data show that pharmacotherapy has not significantly improved the natural history of postoperative clinical and surgical recurrence of CD. In 2003, antimesenteric hand-sewn functional end-to-end (Kono-S) anastomosis was first performed in Japan. This technique has yielded very desirable outcomes in terms of reducing the incidence of anastomotic surgical recurrence. The most recent follow-up of these patients showed that very few had developed surgical recurrence. This new approach is superior to stapled functional end-to-end anastomosis because the stumps are sutured together to create a stabilizing structure (a “supporting column”), serving as a supportive backbone of the anastomosis to help prevent distortion of the anastomotic lumen due to disease recurrence and subsequent clinical symptoms. This technique requires careful mesenteric excision for optimal preservation of the blood supply and innervation. It also results in a very wide anastomotic lumen on the antimesenteric side. The Kono-S technique has shown efficacy in preventing surgical recurrence and the potential to become the new standard of care for intestinal CD.
Japanese Evidences on Nerve-Preserving Lateral Pelvic Lymh Node Dissection for Rectal Cancer
Authors: Kanemitsu Yukihide , Shida Dai , Tsukamoto Shunsuke , Moritani Konosuke , Sakamoto Ryohei
Published: September 2020

In Japan, the standard treatment for advanced low rectal cancer has been total mesorectal excision (TME) + lateral pelvic lymph node dissection (LLND). On the other hand, in the West, preoperative chemoradiotherapy (CRT) + TME has been established as the standard. Japanese surgeons developed nerve-preserving LLND that could reduce complications associated with extended dissection. The Japan Clinical Oncology Group (JCOG)0212 trialinvestigated on the outcomes of so-called prophylactic LLND in patients without evident lateral lymph node metastasis in preoperative diagnostic imaging. Data from the JCOG0212 trial demonstrated scientific validity of the theory and practice of the Japanese approach. Data from the JCOG0212 trial supported the validity and safety of the Japanese approach, that is, TME + LLND for low rectal cancer without routine use of preoperative CRT. For future direction, modern approach for rectal cancer should involve both of the Eastern and Western strategies by combining LLND and CRT.
Treatment of Stages IIIA and IIIB in Kienbock's Disease: A Systematic Review
Authors: Wang Patrick Q. , Matache Bogdan A. , Grewal Ruby , Suh Nina
Published: September 2020

Background Despite numerous proposed surgical interventions, there is a lack of consensus in the optimal treatment of advanced Kienbock's disease.

Purpose This study aims to perform a systematic review of the current evidence in the management of Lichtman's stages IIIA and IIIB of the disease.

Methods A literature search was performed using the MEDLINE, EMBASE, and COCHRANE databases to identify studies between 2008 and 2018 evaluating stage-specific outcomes in Lichtman's stages IIIA and IIIB. The quality of each included paper was evaluated using the Structured Effectiveness Quality Evaluation Scale (SEQES). Data extracted were stage-specificity, clinical and functional outcomes, and radiographic progression of Lichtman's staging.

Results A total of 1,489 titles were identified. Eighty-three papers were fully reviewed, and 30 articles met eligibility criteria for inclusion. There were 3 low-quality and 27 moderate-quality papers. Surgical techniques reported included decompression surgeries, joint-levelling, and radial wedge osteotomies, revascularization techniques, intracarpal arthrodesis, proximal row carpectomy, arthroplasty, and balloon kyphoplasty. All treatment modalities offered pain relief and improvement in functional outcomes. Compared with proximal row carpectomy, intracarpal arthrodesis, and arthroplasty, nonsalvage procedures provided similar clinical and functional outcomes in both stages, with joint-levelling and radial wedge osteotomies preserving greater range of motion.

Conclusion In this systematic review of Kienbock's disease stages IIIA and IIIB, all treatment modalities provided positive outcomes. In stage IIIB, there is evidence to support nonsalvage procedures, as they produced similar clinical outcomes to salvage procedures that have the advantage of not precluding future treatment options if needed and preserving greater range of motion.
'I just hope they take it seriously': homeless men talk about their health care
Authors: Sturman Nancy , Matheson Don
Published: September 2020

ObjectiveMen who experience homelessness in Australia often have complex health and social issues, including the trimorbidity of concurrent mental illness, substance use disorders and physical health conditions. These men tend to have poor health outcomes, and present challenges to healthcare systems. To improve system responsiveness and patient outcomes, the perspectives of marginalised groups need to be understood.
MethodsFive focus groups were conducted with 20 men in a homeless men’s hostel, exploring their experiences of seeking and receiving health care, and views about improving these. An inductive thematic analysis was undertaken.
ResultsSeveral participants expressed gratitude for care provided for life-threatening physical illness and trauma. However, negative experiences of health system responses were more frequently reported. Four emerging themes all made securing effective ‘tickets of entry’ to health care more difficult: dismissive care, care fragmentation, inconsistent medical management of pain and inadequate acknowledgement of psychological distress.
ConclusionsImprovements are needed in care integration and the de-escalation of potentially confrontational interactions. Effective, safe and compassionate system responses to presentations of psychological distress and pain should be collaboratively developed. Some current responses may entrench stigma, further traumatising vulnerable patients.
What is known about the topic?Men who experience homelessness have poor health outcomes and present challenges to healthcare systems.
What does this paper add?This paper describes healthcare experiences and insights of men who are experiencing homelessness in Australia. These men reported experiencing dismissive care, care fragmentation, inconsistent, inadequate and/or unsafe prescribing for pain and inconsistent and/or ineffective responses to psychological distress.
What are the implications for practitioners?Changes are needed in health system responses, informed by the experiences and insights of marginalised people, to break cycles of trauma and exclusion.
Furoate Based Functionalised Ionic Liquid: Antimicrobial and Antioxidant Studies
Authors: Rama R. , Meenakshi S. , Manjunathan J. , Abirami G. , Karthikeyan S.
Published: September 2020

A tetraalkyl ammonium cation and furoate anion based functionalised ionic liquid (FIL), N-methyl-N,N,N-trioctylammonium furoate ([MTOA]+[FA]–) has been synthesised and characterised using FT-IR, NMR, and UV spectroscopic techniques. The invitro antimicrobial activity of the synthesised FIL against two types of Gram-positive bacteria, namely Staphylococcus aureus and Enterobacter faecalis as well as Gram-negative bacteria, namely Escherichia coli and Pseudomonas aeruginosa was tested using a well diffusion method. Similarly, an antifungal test was done against Candida albicans. [MTOA]+[FA]– showed significant inhibitory effect against all the organisms tested as compared with the chosen standards. Antibacterial activity against gram-positive bacteria (zone of inhibition: 16 to 30mm) was found to be higher than that of Gram-negative bacteria (zone of inhibition: 11 to 19mm). Moreover, the antioxidant activity of the synthesised FIL from a ferrous ion (Fe2+) chelating assay and its scavenging activity against 1,1-diphenyl-2-picrylhydrazyl, H2O2, and 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid (ABTS) free radical using spectrophotometric methods are reported. The FIL, [MTOA]+[FA]– showed a moderate antioxidant activity.
Butterfly-Like Anisotropic Magnetoresistance and Angle-Dependent Berry Phase in a Type-II Weyl Semimetal WP2
Authors: Zhang Kaixuan , Du Yongping , Wang Pengdong , Wei Laiming , Li Lin , Zhang Qiang , Qin Wei , Lin Zhiyong , Cheng Bin , Wang Yifan , Xu Han , Fan Xiaodong , Sun Zhe , Wan Xiangang , Zeng Changgan
Published: September 2020

The Weyl semimetal has emerged as a new topologically nontrivial phase of matter, hosting low-energy excitations of massless Weyl fermions. Here, we present a comprehensive study of a type-II Weyl semimetal WP2. Transport studies show a butterfly-like magnetoresistance at low temperature, reflecting the anisotropy of the electron Fermi surfaces. This four-lobed feature gradually evolves into a two-lobed variant with an increase in temperature, mainly due to the reduced relative contribution of electron Fermi surfaces compared to hole Fermi surfaces for magnetoresistance. Moreover, an angle-dependent Berry phase is also discovered, based on quantum oscillations, which is ascribed to the effective manipulation of extremal Fermi orbits by the magnetic field to feel nearby topological singularities in the momentum space. The revealed topological character and anisotropic Fermi surfaces of the WP2 substantially enrich the physical properties of Weyl semimetals, and show great promises in terms of potential topological electronic and Fermitronic device applications.
Constructing a Maximally Entangled Seven-Qubit State via Orthogonal Arrays
Authors: Zha Xin-Wei , Wang Min-Rui , Jiang Ruo-Xu
Published: September 2020

Huber et al. [Phys. Rev. Lett. 118 (2017) 200502] have proved that a seven-qubit state whose three-body marginal states are all maximally mixed does not exist. Here, we propose a method to build a maximally entangled state based on orthogonal arrays to construct maximally entangled seven-qubit states. Using this method, we not only determine that a seven-qubit state whose three-body marginals are all maximally mixed does not exist, but also find the condition for maximally entangled seven-qubit states. We consider that π
ME = 19/140 is a condition for maximally entangled seven-qubit states. Furthermore, we derive three forms of maximally entangled seven-qubit states via orthogonal arrays.
Novel Polarization Control Approach to Long-Term Fiber-Optic Frequency Transfer
Authors: Wang Dong-Jie , Zhang Xiang , Liu Jie , Jiao Dong-Dong , Deng Xue , Gao Jing , Zang Qi , Wang Dan , Liu Tao , Dong Rui-Fang , Zhang Shou-Gang
Published: September 2020

We demonstrate a novel polarization control system based on a gradient descent algorithm, applied to a 450-km optical frequency transfer link. The power of the out-loop beat note is retrieved by controlling the polarization state of the transferred signal, with a recovery time of 24 ms, thereby ensuring the long-term evaluation of the fiber link. As a result, data utilization is enhanced from 70% to 99% over a continuous measurement period of ∼12 h. A fractional transfer instability of 7.2 × 10−20 is achieved at an integration time of 10000 s. This work lays the foundation for the comparison of a remote optical clock system via a long-haul optical fiber link.
Chalcogenide Perovskite YScS3 as a Potential p-Type Transparent Conducting Material
Authors: Zhang Han , Ming Chen , Yang Ke , Zeng Hao , Zhang Shengbai , Sun Yi-Yang
Published: September 2020

Transparent conducting materials (TCMs) have been widely used in optoelectronic applications such as touchscreens, flat panel displays and thin film solar cells. These applications of TCMs are currently dominated by n-type doped oxides. High-performance p-type TCMs are still lacking due to their low hole mobility or p-type doping bottleneck, which impedes efficient device design and novel applications such as transparent electronics. Here, based on first-principles calculations, we propose chalcogenide perovskite YScS3 as a promising p-type TCM. According to our calculations, its optical absorption onset is above 3 eV, which allows transparency to visible light. Its hole conductivity effective mass is 0.48m
0, which is among the smallest in p-type TCMs, suggesting enhanced hole mobility. It could be doped to p-type by group-II elements on cation sites, all of which yield shallow acceptors. Combining these properties, YScS3 holds great promise to enhancing the performance of p-type TCMs toward their n-type counterparts.
Model Hamiltonian for the Quantum Anomalous Hall State in Iron-Halogenide
Authors: Sui Qian , Zhang Jiaxin , Jin Suhua , Xia Yunyouyou , Li Gang
Published: September 2020

We examine quantum anomalous Hall (QAH) insulators with intrinsic magnetism displaying quantized Hall conductance at zero magnetic fields. The spin-momentum locking of the topological edge stats promises QAH insulators with great potential in device applications in the field of spintronics. Here, we generalize Haldane’s model on the honeycomb lattice to a more realistic two-orbital case without the artificial real-space complex hopping. Instead, we introduce an intraorbital coupling, stemming directly from the local spin-orbit coupling (SOC). Our dxy
/d

x
2–y
2
model may be viewed as a generalization of the bismuthene px
/py
-model for correlated d-orbitals. It promises a large SOC gap, featuring a high operating temperature. This two-orbital model nicely explains the low-energy excitation and the topology of two-dimensional ferromagnetic iron-halogenides. Furthermore, we find that electronic correlations can drive the QAH states to a c = 0 phase, in which every band carries a nonzero Chern number. Our work not only provides a realistic QAH model, but also generalizes the nontrivial band topology to correlated orbitals, which demonstrates an exciting topological phase transition driven by Coulomb repulsions. Both the model and the material candidates provide excellent platforms for future study of the interplay between electronic correlations and nontrivial band topology.
In-flight coating of Ag nanoparticles with Cu
Authors: Košutová Tereza , Hanuš Jan , Kylián Ondřej , Cieslar Miroslav , Khalakhan Ivan , Choukourov Andrei , Biederman Hynek
Published: September 2020

AgCu Janus nanoparticles (NPs) were prepared by coating of Ag NPs in flight. The Ag NPs, produced by a gas aggregation source, were coated with Cu during their flight through a tubular magnetron (TMG). Their structure and chemical composition were studied to establish their dependence on the TMG’s operational parameters. The main focus was the influence of the TMG’s current and magnetic field. It was found that trapping of the NPs occurred at a certain combination of these two parameters. When trapping happened, the size of the NPs and their Cu content increased significantly. We have demonstrated that we can vary the composition of the NP’s produced from pristine Ag from perfect Janus NPs with a Ag/Cu ratio of 50/50, to almost-pure Cu NPs with tiny Ag inclusions.
Non-equilibrium magnetic response of canonical spin glass and magnetic glass
Authors: Pal Sudip , Kumar Kranti , Banerjee A , Roy S B , Nigam A K
Published: September 2020

Time and history dependent magnetization has been observed in a wide variety of materials, which are collectively termed as the glassy magnetic systems. However, such systems showing similar non-equilibrium magnetic response can be microscopically very different and they can be distinguished by carefully looking into the details of the observed metastable magnetic behavior. Canonical spin glass (SG) is the most well studied member of this class and has been extensively investigated both experimentally and theoretically over the last five decades. In canonical SGs, the low temperature magnetic state obtained by cooling across the SG transition temperature in presence of an applied magnetic field is known as the field cooled (FC) state. This FC state in canonical SG is widely believed as an equilibrium state arising out of a thermodynamic second order phase transition. Here, we show that the FC state in canonical SG is not really an equilibrium state of the system. We report careful dc magnetization and ac susceptibility measurements on two canonical SG systems, AuMn (1.8%) and AgMn (1.1%). The dc magnetization in the FC state shows clear temperature dependence. In addition, the magnetization shows a distinct thermal hysteresis in the temperature regime below the SG transition temperature. On the other hand, the temperature dependence of ac susceptibility has clear frequency dispersion below SG transition in the FC state prepared by cooling the sample in the presence of a dc-bias field. We further distinguish the metastable response of the FC state of canonical SG from the metastable response of the FC state in an entirely different class of glassy magnetic system namely magnetic glass, where the non-equilibrium behavior is associated with the kinetic-arrest of a first order magnetic phase transition.
Propagation characteristic of axial and circumferential interface waves and detection of the interlaminar defect in multilayered pipes
Authors: Zhang Yunfei , Li Bing , Tian Fei , Xu Lin
Published: September 2020

This paper focuses on the dispersion characteristic of interface waves and the detection of interlaminar defects in multilayered pipes. The interface waves propagating along axial and circumferential directions are simplified as strain problems of planes (r, z) and (r, θ), respectively. The axial interface wave is well suited to axial localization of the defect, just as the circumferential interface wave is to circumferential localization. The dispersion curves and wave structures in generalized forms are built based on double- and treble-layered examples. Both interface waves converge to the Stoneley wave velocity at high frequency, while energy is concentrated on the interface. An experimental system is built. Theoretical and experimental group velocities are compared. The results indicate that the average relative errors of these two interface waves are 0.47% and 0.53%, respectively. An interlaminar crack is detected effectively both in axial and circumferential directions, revealing that interface waves hold great potential for non-destructive evaluation.
Boron-doped carbon quantum dots: a ‘turn-off’ fluorescent probe for dopamine detection
Authors: Anju  , Rais Anam , Rawat Kamla , Prasad Tulika , Bohidar H B
Published: September 2020

Boron-doped carbon quantum dots (size 2.3 nm) were fabricated by a modified hydrothermal carbonization one-pot synthesis protocol using 4-hydroxy phenylboronic acid as the common precursor that provided seed for the formation of carbon quantum dots as well as the dopant. These quantum dots exhibited excellent properties, namely good aqueous dispersion, strong fluorescence emission, good environmental stability, high selectivity and sensitivity towards the neurochemical dopamine even in the absence of any linker, functionalizing agents or enzyme. It is shown that this material can be used as a ‘turn-off’ fluorescent probe for the detection of even low concentrations of dopamine with a limit of detection (3σ/S) of about 6 μM. The simplicity of the synthesis protocol and the ease of dopamine detection define the novelty of this approach.
The Black Cloud—a classic science fiction novel from the pen of an astronomer
Authors: Kraus Simon F
Published: September 2020

Throughout the long history of astronomy, scientists have repeatedly written fictional stories, which often lend themselves to use in the classroom thanks to the authors’ in-depth knowledge and an appealing storyline. This article uses the novel ‘The Black Cloud’, written by the well-known astronomer Fred Hoyle, to show which physical-astronomical tasks can be derived from it. For this purpose, the use of text excerpts as well as the whole novel is conceivable. Beyond the examples of distance determination and the thermodynamics of the atmosphere presented here, the book also offers interesting insights into the work of astronomers in the 1950s, which Hoyle was able to report on first-hand.
Classical tests of general relativity I: looking to the past to understand the present
Authors: Pinochet Jorge
Published: September 2020

Einstein’s theory of general relativity (GR) provides the best available description of gravity. The recent detection of gravitational waves and the first picture of a black hole have provided spectacular confirmations of GR, as well as arousing substantial interest in topics related to gravitation. However, to understand present and future discoveries, it is convenient to look to the past, to the classical tests of GR, namely, the deflection of light by the Sun, the perihelion precession of Mercury, and the gravitational redshift of light. The objective of this work is to offer a non-technical introduction to the classical tests of GR. In this first part of the work, some basic concepts of relativity are introduced and the principle of equivalence is analysed. The second part of the article examines the classical tests.
Effect of neutrals on the anomalous edge plasma transport
Authors: Zhang Yanzeng , Krasheninnikov Sergei I
Published: September 2020

The impact of neutrals on the anomalous edge plasma transport is examined in detail within the resistive drift wave (RDW) turbulence and zonal flow (ZF) system. It is shown that the neutral impact on the RDW turbulence itself is weak, but it can largely damp the ZF and thus lead to an enhancement of the anomalous transport. Such an impact is stronger for the system with a larger adiabatic parameter, where the ZF is more dominant in the absence of neutrals. It is shown that the enhancement of the anomalous transport is related to the detrapping of fluctuations from the vicinity of the extrema of ZF when the neutrals weaken the ZF effect.
Quantitative coherence analysis of dual phase grating x-ray interferometry with source grating*
Authors: Wang Zhi-Li , Zhou Rui-Cheng , Zhao Li-Ming , Ren Kun , Xu Wen , Liu Bo , Chen Heng
Published: September 2020

Dual phase grating x-ray interferometry is compatible with common imaging detectors, and abandons the use of an absorption analyzer grating to reduce the radiation dose. When using x-ray tubes, an absorbing source grating must be introduced into the dual phase grating interferometer. In order to attain a high fringe visibility, in this work we conduct a quantitative coherence analysis of dual phase grating interferometry to find how the source grating affects the fringe visibility. Theoretical analysis shows that with the generalized Lau condition satisfied, the fringe visibility is influenced by the duty cycle of the source grating and the transmission through the grating bar. And the influence of the source grating profile on the fringe visibility is independent of the phase grating type. Numerical results illustrate that the maximum achievable fringe visibility decreases significantly with increasing transmission in the grating bar. Under a given transmission, one can always find an optimal duty cycle to maximize the fringe visibility. These results can be used as general guidelines for designing and optimizing dual phase grating x-ray interferometers for potential applications.
Effects of MgSiO3 on the crystal growth and characteristics of type-Ib gem quality diamond in Fe–Ni–C system*
Authors: Lu Zhi-Yun , Wang Yong-Kui , Fang Shuai , Cai Zheng-Hao , Zhao Zhan-Dong , Wang Chun-Xiao , Ma Hong-An , Chen Liang-Chao , Jia Xiao-Peng
Published: September 2020

We report the effects of MgSiO3 addition on the crystal growth and characteristics of type-Ib diamonds synthesized in Fe–Ni–C system. The experiments were carried out with pressure at 5.5 GPa, temperature at 1385 °C–1405 °C, and duration of 23.1 h. As MgSiO3 increases from 0.0 wt% to 3.0 wt%, the diamond growth temperature increases from 1385 °C to 1405 °C, the addition of MgSiO3 and the movement of P–T diagram toward the higher temperature direction result in a series of effects to the Fe–Ni–C system and crystal growth. Firstly, it increases the content of metastable recrystallized graphite and accelerates the competition with the carbon source needed for diamond growth, thus causing the decreased crystal growth rate. Diamond crystals exhibit the combination form of {111}, {100}, {113}, and {110} sectors, the decreased {100} and {113} sectors, dominated {111} sector are all attributed to the higher growth rate in [100] direction caused by the synergy of MgSiO3 and the movement of P–T diagram. The higher growth rate in [100] direction also increases the metal catalyst and graphite inclusions and leads to the increase of residual tensile stress on the crystal surface. Accompanying with the high growth rate, a higher dissolution rate along [100] and [113] directions than [111] direction occurs at the microstructure and forms the significantly developed (111) stepped growth layer. In addition to the movement of P–T diagram, the addition of MgSiO3 poisons the catalyst and increases the nitrogen content of diamond from 120 ppm to 227 ppm.
A MOVPE method for improving InGaN growth quality by pre-introducing TMIn*
Authors: Cao Zi-Kun , Zhao De-Gang , Yang Jing , Zhu Jian-Jun , Liang Feng , Liu Zong-Shun
Published: September 2020

We propose a metal organic vapor phase epitaxy (MOVPE) method of pre-introducing TMIn during the growth of u-GaN to improve the subsequent growth of InGaN and discuss the impact of this method in detail. Monitoring the MOVPE by the interference curve generated by the laser incident on the film surface, we found that this method avoided the problem of the excessive InGaN growth rate. Further x-ray diffraction (XRD), photoluminescence (PL), and atomic force microscope (AFM) tests showed that the quality of InGaN is improved. It is inferred that by introducing TMIn in advance, the indium atom can replace the gallium atom in the reactor walls, delivery pipes, and other corners. Hence the auto-incorporation of gallium can be reduced when InGaN is grown, so as to improve the material quality.
Recent advancements of the NEWS-G experiment
Authors: Katsioulas Ioannis
Published: September 2020

NEWS-G (New Experiments With Spheres-Gas) is an experiment aiming to shine a light on the dark matter conundrum with a novel gaseous detector, the spherical proportional counter. It uses light gases, such as hydrogen, helium, and neon, as targets to expand dark matter searches to the sub-GeV/c2 mass region. NEWS-G produced its first results with a 60 cm in diameter detector installed at LSM (France), excluding at 90% C.L. cross-sections above 4.4 · 1037 cm2 for dark matter candidates of 0.5 GeV/c2 mass. Currently, a 140 cm in diameter detector is being built at LSM and a commissioning run is underway, prior to its installation at SNOLAB (Canada) at the end of the year. Presented here are developments incorporated in this new detector: a) sensor technologies using resistive materials and multianode read-out that allow high gain and high pressure operation; b) gas purification techniques to remove contaminants (H2O, O2); c) reduction of 210Pb induced background through copper electroforming methods; d) utilisation of UV-lasers for detector calibration, detector response monitoring and estimation of gas related fundamental properties. This next phase of NEWS-G will allow searches for low mass dark matter with unprecedented sensitivity.
Temporal role of crop residue burning (CRB) in Delhi’s air pollution
Authors: Agarwala Meghna , Chandel Abhinav
Published: September 2020

The National Capital Region of Delhi in India is one of the most polluted urban areas in the world, and its intense pollution episodes are attributed to crop residue burning (CRB). However, existing studies are limited in time and pollutant type, and do not often control for non-biophysical factors. We used ground-measured pollutant levels and aerosol optical depth (AOD) data to understand the role of CRB in Delhi’s air pollution from 2015 to 2018. While the CRB peak in October–November is associated with pollution episodes, biophysical conditions in the April–May CRB period allow the pollutants to disperse. Elevation in SO2 and ozone is associated with CRB from more distant source areas than elevations in PM2.5 and PM10: gaseous molecules such as SO2 may travel further than particulate matter; and NO2 may convert to ozone during long-range transport. Pollution levels are very high in December–January despite low CRB in this period. Given the high contribution of biomass burning in this period in source apportionment studies, it is unclear whether the sharp elevation in pollutant levels with temperature drop in this period can be explained only with meteorological conditions, or whether there are unquantified sources contributing to pollutant load in December–January, such as small-scale CRB that is undetected by the MODIS active fire product or local burning for heat. There are limitations to the substitution of ground-measured pollutants with AOD in analyzing drivers of pollution since AOD, unlike ground-measured pollutants, is unable to identify fine-scale drivers such as construction. Further studies that use seasonal emissions inventories, particularly for waste and household burning for heat, are required to understand their contribution to pollution in December–January as they may have a disproportionate impact on pollution and human health.
Effect of Behavior Change Techniques Targeting Clinicians to Improve Advance Care Planning in Heart Failure: A Systematic Review and Meta-Analysis
Authors: Schichtel Markus , Wee Bee , Perera Rafael , Onakpoya Igho , Albury Charlotte
Published: September 2020

Background

National and international guidelines recommend advance care planning (ACP) for patients with heart failure. But clinicians seem hesitant to engage with ACP.

Purpose

Our aim was to identify behavioral interventions with the greatest potential to engage clinicians with ACP in heart failure.

Methods

A systematic review and meta-analysis. We searched CINAHL, Cochrane Central Register of Controlled Trials, Database of Systematic Reviews, Embase, ERIC, Ovid MEDLINE, Science Citation Index, and PsycINFO for randomized controlled trials (RCTs) from inception to August 2018. Three reviewers independently extracted data, assessed risk of bias (Cochrane risk of bias tool), the quality of evidence (Grading of Recommendation Assessment, Development, and Evaluation), and intervention synergy according to the behavior change wheel and behavior change techniques (BCTs). Odds ratios (ORs) were calculated for pooled effects.

Results

Of 14,483 articles screened, we assessed the full text of 131 studies. Thirteen RCTs including 3,709 participants met all of the inclusion criteria. The BCTs of prompts/cues (OR: 4.18; 95% confidence interval [CI]: 2.03–8.59), credible source (OR: 3.24; 95% CI: 1.44–7.28), goal setting (outcome; OR: 2.67; 95% CI: 1.56–4.57), behavioral practice/rehearsal (OR: 2.64; 95% CI: 1.50–4.67), instruction on behavior performance (OR: 2.49; 95% CI: 1.63–3.79), goal setting (behavior; OR: 2.12; 95% CI: 1.57–2.87), and information about consequences (OR: 2.06; 95% CI: 1.40–3.05) showed statistically significant effects to engage clinicians with ACP.

Conclusion

Certain BCTs seem to improve clinicians’ practice with ACP in heart failure and merit consideration for implementation into routine clinical practice.