bluuebunny/crossref_metadata_2025 huggingface dataset:
A case of urban integration: Vienna's port area and the Ottoman merchants in the eighteenth century
Authors: Do Paço David
Published: January 2020

Studying the Ottoman subjects in eighteenth-century Vienna helps to understand better the process of integration of the different districts of the city in a fast-changing context, especially around its Danube port area. Despite the withdrawal of the Ottoman empire from central Europe after 1683, Ottomans were fully a part of the history of Vienna and their presence has to be explored within the specific urban dynamics of a city: the reconfiguration of its economic sectors and social places, the tensions at play between the socio-economic groups by which a city was made and the evolution of its urban planning. Focusing on the Ottoman merchants operating in Vienna allows us to identify and to analyse the workings of the port area of the fourth largest city in Europe and to explore the social spaces of Viennese markets, streets, courtyards and coffeehouses.
Restraint stress of male mice triggers apoptosis in spermatozoa and spermatogenic cells via activating the TNF-α system
Authors: Zhang Jie , Kong De-Ling , Xiao Bin , Yuan Hong-Jie , Kong Qiao-Qiao , Han Xiao , Luo Ming-Jiu , Tan Jing-He
Published: January 2020

Studies have indicated that psychological stress impairs human fertility and that various stressors can induce apoptosis of testicular cells. However, the mechanisms by which psychological stress on males reduces semen quality and stressors induce apoptosis in testicular cells are largely unclear. Using a psychological (restraint) stress mouse model, we tested whether male psychological stress triggers apoptosis of spermatozoa and spermatogenic cells through activating tumour necrosis factor (TNF)-α signalling. Wild-type or TNF-α−/−male mice were restrained for 48 h before examination for apoptosis and expression of TNF-α and TNF receptor 1 (TNFR1) in spermatozoa, epididymis, seminiferous tubules and spermatogenic cells. The results showed that male restraint significantly decreased fertilization rate and mitochondrial membrane potential, while increasing levels of malondialdehyde, active caspase-3, TNF-α and TNFR1 in spermatozoa. Male restraint also increased apoptosis and expression of TNF-α and TNFR1 in caudae epididymides, seminiferous tubules and spermatogenic cells. Sperm quality was also significantly impaired when spermatozoa were recovered 35 days after male restraint. The restraint-induced damage to spermatozoa, epididymis and seminiferous tubules was significantly ameliorated in TNF-α−/−mice. Furthermore, incubation with soluble TNF-α significantly reduced sperm motility and fertilizing potential. Taken together, the results demonstrated that male psychological stress induces apoptosis in spermatozoa and spermatogenic cells through activating the TNF-α system and that the stress-induced apoptosis in spermatogenic cells can be translated into impaired quality in future spermatozoa.
Truncus arteriosus with retrograde aortic flow: a unique case
Authors: Solomon Matthew A. , Thattaliyath Bijoy , Ashwath Ravi
Published: January 2020

Truncus arteriosus is a rare cyanotic congenital heart defect that involves septation failure of the heart’s main arterial outflow tract. Varying morphologies of the truncal valve and aorta have been reported; however, the ascending aorta is typically supplied via anterograde blood flow through the truncal valve. We present the first reported case of neonatal truncus arteriosus with the ascending aorta being supplied entirely by retrograde flow.
Development and usability testing of a very brief intervention for personalised cancer risk assessment to promote behaviour change in primary care using normalisation process theory
Authors: Mills Katie , Griffin Simon J. , Sutton Stephen , Usher-Smith Juliet A.
Published: January 2020

Background:

Cancer is the second leading cause of death worldwide. Lifestyle choices play an important role in the aetiology of cancer with up to 4 in 10 cases potentially preventable. Interventions delivered by healthcare professionals (HCPs) that incorporate risk information have the potential to promote behaviour change. Our aim was to develop a very brief intervention incorporating cancer risk, which could be implemented within primary care.

Methods:

Guided by normalisation process theory (NPT), we developed a prototype intervention using literature reviews, consultation with patient and public representatives and pilot work with patients and HCPs. We conducted focus groups and interviews with 65 HCPs involved in delivering prevention activities. Findings were used to refine the intervention before 22 HCPs completed an online usability test and provided further feedback via a questionnaire incorporating a modified version of the NoMAD checklist.

Results:

The intervention included a website where individuals could provide information on lifestyle risk factors view their estimated 10-year risk of developing one or more of the five most common preventable cancers and access lifestyle advice incorporating behaviour change techniques. Changes incorporated from feedback from the focus groups and interviews included signposting to local services and websites, simplified wording and labelling of risk information. In the usability testing, all participants felt it would be easy to collect the risk information. Ninety-one percent felt the intervention would enable discussion about cancer risk and believed it had potential to be easily integrated into National Health Service (NHS) Health Checks. However, only 36% agreed it could be delivered within 5 min.

Conclusions:

With the use of NPT, we developed a very brief intervention that is acceptable to HCPs in primary care and could be potentially integrated into NHS Health Checks. However, further work is needed to assess its feasibility and potential effectiveness.
Fixers and Framers: Reconsidering the Sources and Meaning of the American Founding
Authors: Edling Max M.
Published: January 2020

InUnruly Americans and the Origins of the Constitution, Woody Holton recounts how he introduces his students to the framing of the US Constitution by playing a game. Dividing the blackboard into three sections, he invites his students to shout out their favorite clauses of the Constitution. Holton enters the clauses in the columns and asks his students to label them. Clauses like freedom of religion and speech, freedom from illegal search and seizure, and the right to bear arms end up in the third column, which the students soon recognize as the Bill of Rights. In the first column are clauses taken over from the Articles of Confederation. The second column, which typically ends up with the single entry of “checks and balances,” is the Constitution without amendments. Students struggle to label the first and second columns correctly. When they finally do, they are struck by the fact that the most popular clauses of the Constitution are not in the original document.
Affective neuroscience, emotional regulation, and international relations
Authors: Gammon Earl
Published: January 2020

International relations (IR) has witnessed an emerging interest in neuroscience, particularly for its relevance to a now widespread scholarship on emotions. Contributing to this scholarship, this paper draws on the subfields of affective neuroscience and neuropsychology, which remain largely unexplored in IR. Firstly, the paper draws on affective neuroscience in illuminating affect's defining role in consciousness and omnipresence in social behavior, challenging the continuing elision of emotions in mainstream approaches. Secondly, it applies theories of depth neuropsychology, which suggest a neural predisposition originating in the brain's higher cortical regions to attenuate emotional arousal and limit affective consciousness. This predisposition works to preserve individuals’ self-coherence, countering implicit assumptions about rationality and motivation within IR theory. Thirdly, it outlines three key implications for IR theory. It argues that affective neuroscience and neuropsychology offer a route toward deep theorizing of ontologies and motivations. It also leads to a reassessment of the social regulation of emotions, particularly as observed in institutions, including the state. It also suggests a productive engagement with constructivist and poststructuralist approaches by addressing the agency of the body in social relations. The paper concludes by sketching the potential for a therapeutically-attuned approach to IR.
Why Do Evangelicals Support Israel?
Authors: Inbari Motti , Bumin Kirill M. , Byrd M. Gordon
Published: January 2020

This study considers the sources of evangelical support for Israel, utilizing an original survey of 1,000 evangelical and born-again respondents. The results show that the three strongest predictors of evangelical and born-again Christian support for Israel are (1) age (older respondents are more supportive); (2) opinion of Jews; and (3) socialization (frequency of hearing other evangelicals talking about Israel). Our results also show that evangelical support for Israel is driven by respondents' beliefs rooted in evangelical Christian theology on eschatology and Biblical literalism. Thus, the most significant ideological statements that were found in the research were that the “State of Israel is proof of the fulfillment of prophesy regarding the nearing of Jesus' Second Coming” and that “Jews are God's chosen people.” Another important finding is that there is less support toward Israel among young evangelicals (ages 18–29).
Comprehensive Observations of Substorm‐Enhanced Plasmaspheric Hiss Generation, Propagation, and Dissipation
Authors: Liu Nigang , Su Zhenpeng , Gao Zhonglei , Zheng Huinan , Wang Yuming , Wang Shui , Miyoshi Yoshizumi , Shinohara Iku , Kasahara Yoshiya , Tsuchiya Fuminori , Kumamoto Atsushi , Matsuda Shoya , Shoji Masafumi , Mitani Takefumi , Takashima Takeshi , Kazama Yoichi , Wang Bo‐Jhou , Wang Shiang‐Yu , Jun Chae‐Woo , Chang Tzu‐Fang , Tam Sunny W. Y. , Kasahara Satoshi , Yokota Shoichiro , Keika Kunihiro , Hori Tomoaki , Matsuoka Ayako
Published: January 2020

Plasmaspheric hiss is an important whistler‐mode emission shaping the Van Allen radiation belt environment. How the plasmaspheric hiss waves are generated, propagate, and dissipate remains under intense debate. With the five spacecraft of Van Allen Probes, Exploration of energization and Radiation in Geospace (Arase), and Geostationary Operational Environmental Satellites missions at widely spaced locations, we present here the first comprehensive observations of hiss waves growing from the substorm‐injected electron instability, spreading within the plasmasphere, and dissipating over a large spatial scale. During substorms, hot electrons were injected energy‐dispersively into the plasmasphere near the dawnside and, probably through a combination of linear and nonlinear cyclotron resonances, generated whistler‐mode waves with globally drifting frequencies. These waves were able to propagate from the dawnside to the noonside, with the frequency‐drifting feature retained. Approximately 5 hr of magnetic local time away from the source region in the dayside sector, the wave power was dissipated to
of its original level.
The dimension and morphology of alveolar bone at maxillary anterior teeth in periodontitis: a retrospective analysis—using CBCT
Authors: Zhang Xue , Li Yuchao , Ge Ziming , Zhao Haijiao , Miao Lei , Pan Yaping
Published: January 2020

The morphology of the alveolar bone at the maxillary anterior teeth in periodontitis patients was evaluated by cone-beam computed tomography (CBCT) to investigate the distribution of alveolar defects and provide guidance for clinical practice. Ninety periodontitis patients and 30 periodontally healthy individuals were selected to determine the morphology of the alveolar bone at the maxillary anterior teeth according to the degree of bone loss, tooth type, sex and age. The differences in the dimensions between periodontitis patients and healthy individuals were compared, and the distribution of alveolar bone defects was analyzed. A classification system was established regarding the sagittal positions and angulations of the teeth. The buccal residual bone was thicker and the lingual bone was thinner in the periodontitis patients than in the periodontally healthy individuals, and there were differences between the different tooth types, sexes and age subgroups. The buccal undercut was close to the alveolar ridge, while fenestration was reduced and the apical bone height was higher in periodontitis patients than in periodontally healthy individuals. The apical bone height increased with the aggravation of bone loss and age. The proportions of different sagittal positions changed with the aggravation of bone loss. Moreover, the teeth moved more buccally regarding the positions of the maxillary anterior teeth. The morphology of the alveolar bone at the maxillary anterior teeth differed between periodontitis patients and healthy individuals, and the differences were related to the degree of bone loss, tooth type, sex and age.
Correction: Acidity promotes tumour progression by altering macrophage phenotype in prostate cancer
Authors: El-Kenawi Asmaa , Gatenbee Chandler , Robertson-Tessi Mark , Bravo Rafael , Dhillon Jasreman , Balagurunathan Yoganand , Berglund Anders , Vishvakarma Naveen , Ibrahim-Hashim Arig , Choi Jung , Luddy Kimberly , Gatenby Robert , Pilon-Thomas Shari , Anderson Alexander , Ruffell Brian , Gillies Robert
Published: January 2020

An amendment to this paper has been published and can be accessed via a link at the top of the paper.
Author Correction: FRQ-CK1 interaction determines the period of circadian rhythms in Neurospora
Authors: Liu Xiao , Chen Ahai , Caicedo-Casso Angélica , Cui Guofei , Du Mingjian , He Qun , Lim Sookkyung , Kim Hang J. , Hong Christian I. , Liu Yi
Published: January 2020

An amendment to this paper has been published and can be accessed via a link at the top of the paper.
Fibroblasts in urothelial bladder cancer define stroma phenotypes that are associated with clinical outcome
Authors: Mezheyeuski Artur , Segersten Ulrika , Leiss Lina Wik , Malmström Per-Uno , Hatina Jiri , Östman Arne , Strell Carina
Published: January 2020

Little attention was given to the interaction between tumor and stromal cells in urothelial bladder carcinoma (UBC). While recent studies point towards the existence of different fibroblast subsets, no comprehensive analyses linking different fibroblast markers to UBC patient survival have been performed so far. Through immunohistochemical analysis of five selected fibroblast markers, namely alpha smooth muscle actin (ASMA), CD90/Thy-1, fibroblast activation protein (FAP), platelet derived growth factor receptor-alpha and -beta (PDGFRa,-b), this study investigates their association with survival and histopathological characteristics in a cohort of 344 UBC patients, involving both, muscle-invasive and non-muscle-invasive cases. The data indicates that combinations of stromal markers are more suited to identify prognostic patient subgroups than single marker analysis. Refined stroma-marker-based patient stratification was achieved through cluster analysis and identified a FAP-dominant patient cluster as independent marker for shorter 5-year-survival (HR(95% CI)2.25(1.08–4.67), p = 0.030). Analyses of interactions between fibroblast and CD8a-status identified a potential minority of cases with CD90-defined stroma and high CD8a infiltration showing a good prognosis of more than 80% 5-year-survival. Presented analyses point towards the existence of different stroma-cell subgroups with distinct tumor-modulatory properties and motivate further studies aiming to better understand the molecular tumor–stroma crosstalk in UBC.
Interaction of the hydrogen molecule with the environment: stability of the system and the $${\mathscr{PT}}$$ symmetry breaking
Authors: Wrona I. A. , Jarosik M. W. , Szczȩśniak R. , Szewczyk K. A. , Stala M. K. , Leoński W.
Published: January 2020

The stability of the hydrogen molecule interacting with the environment according to the balanced gain and loss energy scheme was studied. We determined the properties of the molecule taking into account all electronic interactions, the parameters of the Hamiltonian being computed by the variational method. The interaction of the hydrogen molecule with the environment was modeled parametrically (γ) by means of the non-Hermitian, $${\mathscr{PT}}$$
P
T
-symmetric Hamiltonian. We showed that the hydrogen molecule is dynamically unstable. Its dissociation time (TD) decreases if the γ parameter increases (for γ → 0 we got TD → + ∞). The dynamic instability of the hydrogen molecule is superimposed on the decrease in its static stability as γ increases. Then we can observe the decrease in the dissociation energy value and the existence of the metastable state of the molecule as γMS reaches 0.659374 Ry. The hydrogen molecule is statically unstable when γ > γD = 1.024638 Ry. Moreover, we can also observe the $${\mathscr{PT}}$$
P
T
symmetry breaking effect for the electronic Hamiltonian when $${\gamma }_{{\mathscr{PT}}}$$

γ

P
T

 = 0.520873 Ry. This effect does not affect such properties of the hydrogen molecule as: the electronic Hamiltonian parameters, the phonon and the rotational energies, and the values of the electron-phonon coupling constants neither it disturbs the dynamics of the electronic subsystem. However, the number of available quantum states goes down to four.
Seed protein content and its relationships with agronomic traits in pigeonpea is controlled by both main and epistatic effects QTLs
Authors: Obala Jimmy , Saxena Rachit K. , Singh Vikas K. , Kale Sandip M. , Garg Vanika , Kumar C. V. Sameer , Saxena K. B. , Tongoona Pangirayi , Sibiya Julia , Varshney Rajeev K.
Published: January 2020

The genetic architecture of seed protein content (SPC) and its relationships to agronomic traits in pigeonpea is poorly understood. Accordingly, five F2 populations segregating for SPC and four agronomic traits (seed weight (SW), seed yield (SY), growth habit (GH) and days to first flowering (DFF)) were phenotyped and genotyped using genotyping-by-sequencing approach. Five high-density population-specific genetic maps were constructed with an average inter-marker distance of 1.6 to 3.5 cM, and subsequently, integrated into a consensus map with average marker spacing of 1.6 cM. Based on analysis of phenotyping data and genotyping data, 192 main effect QTLs (M-QTLs) with phenotypic variation explained (PVE) of 0.7 to 91.3% were detected for the five traits across the five populations. Major effect (PVE ≥ 10%) M-QTLs included 14 M-QTLs for SPC, 16 M-QTLs for SW, 17 M-QTLs for SY, 19 M-QTLs for GH and 24 M-QTLs for DFF. Also, 573 epistatic QTLs (E-QTLs) were detected with PVE ranging from 6.3 to 99.4% across traits and populations. Colocalization of M-QTLs and E-QTLs explained the genetic basis of the significant (P < 0.05) correlations of SPC with SW, SY, DFF and GH. The nature of genetic architecture of SPC and its relationship with agronomic traits suggest that genomics-assisted breeding targeting genome-wide variations would be effective for the simultaneous improvement of SPC and other important traits.
Efficient generation of thymic epithelium from induced pluripotent stem cells that prolongs allograft survival
Authors: Otsuka Ryo , Wada Haruka , Tsuji Hyuma , Sasaki Airi , Murata Tomoki , Itoh Mizuho , Baghdadi Muhammad , Seino Ken-ichiro
Published: January 2020

The thymus plays a significant role in establishing immunological self-tolerance. Previous studies have revealed that host immune reaction to allogeneic transplants could be regulated by thymus transplantation. However, physiological thymus involution hinders the clinical application of these insights. Here, we report an efficient generation of thymic epithelial-like tissue derived from induced pluripotent stem cells (iPSCs) and its potential to regulate immune reaction in allogeneic transplantation. We established an iPSC line which constitutively expresses mouseFoxn1gene and examined the effect of its expression duringin vitrodifferentiation of thymic epithelial cells (TECs). We found thatFoxn1expression enhances the differentiation induction of cells expressing TEC-related cell surface molecules along with upregulation of endogenousFoxn1. iPSC-derived TECs (iPSC-TECs) generated T cells in nude recipient mice after renal subcapsular transplantation. Moreover, iPSC-TEC transplantation to immuno-competent recipients significantly prolonged the survival of allogeneic skin. Our study provides a novel concept for allogeneic transplantation in the setting of regenerative medicine.
Functional evaluation and testing of a newly developed Teleost’s Fish Otolith derived biocomposite coating for healthcare
Authors: Montañez Nerly D. , Carreño Heider , Escobar Patricia , Estupiñán Hugo A. , Peña Darío Y. , Goel Saurav , Endrino Jose L.
Published: January 2020

Polymers such as polycaprolactone (PCL) possess biodegradability, biocompatibility and affinity with other organic media that makes them suitable for biomedical applications. In this work, a novel biocomposite coating was synthesised by mixing PCL with layers of calcium phosphate (hydroxyapatite, brushite and monetite) from a biomineral called otolith extracted from Teleost fish (Plagioscion Squamosissimus) and multiwalled carbon nanotubes in different concentrations (0.5, 1.0 and 1.5 g/L). The biocomposite coating was deposited on an osteosynthesis material Ti6Al4V by spin coating and various tests such as Fourier transformation infrared spectroscopy (FTIR), Raman spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), scratch tests, MTT reduction cytotoxicity, HOS cell bioactivity (human osteosarcoma) by alkaline phosphatase (ALP) and fluorescence microscopy were performed to comprehensively evaluate the newly developed biocoating. It was found that an increase in the concentration of carbon nanotube induced microstructural phase changes of calcium phosphate (CP) leading to the formation of brushite, monetite and hydroxyapatite. While we discovered that an increase in the concentration of carbon nanotube generally improves the adhesion of the coating with the substrate, a certain threshold exists such that the best deposition surfaces were obtained as PCL/CP/CNT 0.0 g/L and PCL/CP/CNT 0.5 g/L.
Global translational repression induced by iron deficiency in yeast depends on the Gcn2/eIF2α pathway
Authors: Romero Antonia María , Ramos-Alonso Lucía , Alepuz Paula , Puig Sergi , Martínez-Pastor María Teresa
Published: January 2020

Iron is an essential element for all eukaryotic organisms because it participates as a redox active cofactor in a wide range of biological processes, including protein synthesis. Translation is probably the most energy consuming process in cells. Therefore, one of the initial responses of eukaryotic cells to stress or nutrient limitation is the arrest of mRNA translation. In first instance, the budding yeast Saccharomyces cerevisiae responds to iron deficiency by activating iron acquisition and remodeling cellular metabolism in order to prioritize essential over non-essential iron-dependent processes. We have determined that, despite a global decrease in transcription, mRNA translation is actively maintained during a short-term exposure to iron scarcity. However, a more severe iron deficiency condition induces a global repression of translation. Our results indicate that the Gcn2-eIF2α pathway limits general translation at its initiation step during iron deficiency. This bulk translational inhibition depends on the uncharged tRNA sensing Gcn1-Gcn20 complex. The involvement of the Gcn2-eIF2α pathway in the response to iron deficiency highlights its central role in the eukaryotic response to stress or nutritional deprivation, which is conserved from yeast to mammals.
Glycofullerenes as non-receptor tyrosine kinase inhibitors- towards better nanotherapeutics for pancreatic cancer treatment
Authors: Serda Maciej , Malarz Katarzyna , Mrozek-Wilczkiewicz Anna , Wojtyniak Marcin , Musioł Robert , Curley Steven A.
Published: January 2020

The water-soluble glycofullerenes GF1 and GF2 were synthesized using two-step modified Bingel-Hirsch methodology. Interestingly, we identified buckyballs as a novel class of non-receptor Src kinases inhibitors. The evaluated compounds were found to inhibit Fyn A and BTK proteins with IC50 values in the low micromolar range, with the most active compound at 39 µM. Moreover, we have demonstrated that formation of protein corona on the surface of [60]fullerene derivatives is changing the landscape of their activity, tuning the selectivity of obtained carbon nanomaterials towards Fyn A and BTK kinases. The performed molecular biology studies revealed no cytotoxicity and no influence of engineered carbon nanomaterials on the cell cycle of PANC-1 and AsPC-1 cancer cell lines. Incubation with the tested compounds resulted in the cellular redox imbalance triggering the repair systems and influenced the changing of protein levels.
A sensitive “ON–OFF” fluorescent probe based on carbon dots for Fe2+ detection and cell imaging
Authors: Wei Shanshan , Tan Lihong , Yin Xiangyu , Wang Ruoming , Shan Xueru , Chen Qian , Li Tinghua , Zhang Xinyu , Jiang Chunzhu , Sun Guoying
Published: January 2020

A sensitive fluorescent probe based on carbon dots has been synthesized by a one-pot hydrothermal method for the rapid detection of intracellular Fe2+.
Direct observation of the formation of a CRISPR–Cas12a R-loop complex at the single-molecule level
Authors: Cui Yang , Tang Yangchao , Liang Meng , Ji Qinghua , Zeng Yan , Chen Hui , Lan Jie , Jin Peng , Wang Lei , Song Guangtao , Lou Jizhong
Published: January 2020

An optical tweezers-based single-molecule manipulation assay was developed to detect the formation of an R-loop complex in the CRISPR–Cas12a system.
Simultaneous exfoliation and colloidal formation of few-layer semiconducting MoS2 sheets in water
Authors: Wu Xutao , Li Yuan , Chen Libo , Zhao Jie , Wu Biao , Zhang Zhi-Bin
Published: January 2020

A simple method allowing for simultaneous liquid-phase exfoliation of MoS2 crystals into few-layer sheets and colloidal formation of the exfoliated sheets is reported.
A ‘light-up’ intercalator displacement assay for detection of triplex DNA stabilizers
Authors: del Mundo Imee M. A. , Cho Eun Jeong , Dalby Kevin N. , Vasquez Karen M.
Published: January 2020

A ‘light-up’ intercalator displacement assay to detect binding of triplex ligands was developed and assessed for high-throughput screening applicability.
Dimerization of aldosuloses and aldonolactones into branched higher carbon sugars
Authors: Zhao Yachen , Wang Shengyang , Yu Biao
Published: January 2020

Homo-dimerizations of a variety of aldosulose and aldonolactone derivatives via aldol and Claisen reactions have been achieved, leading to novel branched higher carbon sugars in a highly stereoselective manner.
A dual-responsive luminescent sensor based on a water-stable Cd(ii)-MOF for the highly selective and sensitive detection of acetylacetone and Cr2O72− in aqueous solutions
Authors: Yang Ying-Jie , Li Yue-Hua , Liu Dong , Cui Guang-Hua
Published: January 2020

Two water-stable cadmium(ii) MOFs were synthesized and characterized. 1 is the first dual-function Cd(ii)-MOF luminescent sensor for sensing acetylacetone and Cr2O72− in aqueous solution with high sensitivity and selectivity and good recyclability.
Correction: Azamacrocycles and tertiary amines can be used to form size tuneable hollow structures or monodisperse oxide nanoparticles depending on the ‘M’ source
Authors: Tilburey Graham E. , Blundell Toby J. , Patwardhan S. V. , Argent Stephen P. , Perry Carole C.
Published: January 2020

Correction for ‘Azamacrocycles and tertiary amines can be used to form size tuneable hollow structures or monodisperse oxide nanoparticles depending on the ‘M’ source’ by Graham E. Tilburey, et al., Dalton Trans., 2019, 48, 15470–15479.
Slurry sampling thermospray flame furnace atomic absorption spectrometric determination of bismuth in water and geological samples combined with ultrasound-assisted dispersive micro solid phase extraction
Authors: Hu Kan , Li Peng , Yang Shengchun , Wen Xiaodong
Published: January 2020

UA-DMSPE was combined with TS-FF-AAS for the first time, and a sensitive method for the determination of bismuth was established.
The mechanism of metal exchange in non-metallic nanoclusters
Authors: Wang Shuxin , Xiong Lin , Sun Guodong , Tang Li , Zhang Jun , Pei Yong , Zhu Manzhou
Published: January 2020

We substituted gold atoms in fcc structured Au28 and Au36 nanoclusters with a Ag(i)SR complex and obtained AgxAu28−x and AgxAu36−x nanoclusters, respectively.
Co(ii) and Zn(ii) pyrazolyl-benzimidazole complexes with remarkable antibacterial activity
Authors: Chkirate Karim , Karrouchi Khalid , Dege Necmi , Kheira Sebbar Nada , Ejjoummany Abdelaziz , Radi Smaail , Adarsh N. N. , Talbaoui Ahmed , Ferbinteanu Marilena , Essassi El Mokhtar , Garcia Yann
Published: January 2020

Three pseudopolymorphs based on a coordination complex of a pyrazolyl-benzimidazole ligand have been synthesized and characterized by single crystal X-diffraction, and showed remarkable antibacterial properties.
Catalytic strategies towards 1,3-polyol synthesis by enantioselective cascades creating multiple alcohol functions
Authors: Sperandio Céline , Rodriguez Jean , Quintard Adrien
Published: January 2020

This review highlights the different enantioselective catalyst-controlled cascades creating multiple alcohol functions and ensuring through subsequent simple derivatization, the rapid preparation of extended 1,3-polyols.
Reply to the ‘Comment on “Quantum interference effects in biphenyl dithiol for gas detection”’ by A. Grigoriev, H. Jafri and K. Leifer, RSC Adv., 2020, 10, DOI: 10.1039/C9RA00451C
Authors: Prasongkit Jariyanee
Published: January 2020

We reply to the Comment by Leifer et al. on our publication [Prasongkit et al., RSC Adv., 2016, 64, 59299]. We maintain that, as biphenyl is non-reactive, low binding energies are expected when gases are adsorbed on biphenyl dithiol.
Correction: A Trojan horse biomimetic delivery strategy using mesenchymal stem cells for PDT/PTT therapy against lung melanoma metastasis
Authors: Ouyang Xumei , Wang Xiaoling , Kraatz Heinz-Bernhard , Ahmadi Soha , Gao Jianqing , Lv Yuanyuan , Sun Xiaoyi , Huang Yongzhuo
Published: January 2020

Correction for ‘A Trojan horse biomimetic delivery strategy using mesenchymal stem cells for PDT/PTT therapy against lung melanoma metastasis’ by Xumei Ouyang et al., Biomater. Sci., 2020, DOI: 10.1039/c9bm01401b.
Suppression of common‐mode voltage spectral peaks by using rotation reverse carriers in sinusoidal pulse width modulation three‐phase inverters with CFM
Authors: Huang Jin , Li Kaicheng
Published: January 2020

The common‐mode interference in three‐phase inverters is a prominent problem and is hard to be suppressed. The common‐mode voltage (CMV) is an important source of common‐mode interference. The spectral peaks of CMV can be suppressed markedly through carrier frequency modulation (CFM) in three‐phase inverters. The multi‐carrier technology can be used to further suppress the spectral peaks of CMV, but it is not easy to achieve in the CFM case because of the changing carrier frequency. A new method, which is named the rotation reverse carriers (RRC) scheme, is presented to solve this problem here. In this scheme, the three‐phase carriers reverse in turn so that some peaks can be counteracted in the CMV spectrum. This leads to a further reduction in spectral peaks of CMV based on the effect obtained by using CFM. Using the RRC scheme can also ensure the balance of three output voltages. In order to reduce the adverse effects on differential‐mode characteristics, the RRC scheme is also optimised here. The total harmonic distortion is lowered by the use of an optimal RRC scheme. The feasibility and effectiveness of the proposed RRC scheme are verified by the simulations and experimental results in a three‐phase inverter.
Variable Step Size Solution of Standard Parabolic Equation in Complex Environment
Authors: Gao Ying , Shao Qun , Yan Binzhou , Guo Shuxia
Published: January 2020

Aiming at the problem that it is difficult to balance the accuracy and velocity of the fixed-step solution of standard parabolic equation in the study of radio wave propagation in a wide range of complex environments, a variable-step solution method of standard parabolic equation is proposed. Firstly, after deducing the relationship between the error of SSFT solution and step size, frequency and other factors; And the basic selection range of step size for SPE variable step size solution is given. Secondly, the action mechanism of different environmental factors and the requirement of changing trend for step size are expounded through simulation, and the complex environment of SPE application is classified according to the requirement of error. Finally, the method is used to simulate the characteristics of the typical complex environment. The simulation results show that the method can save up to 71.4% of the time compared with the fixed-step method of parabolic equation under the condition of ensuring the calculation accuracy. The reliability and efficiency of the proposed method are verified, and the calculation efficiency of the parabolic equation radio wave prediction can be greatly improved. Therefore, the parabolic equation method with variable step size can ensure the accuracy of calculation, reduce the memory and time required for calculation, greatly improves the efficiency of calculation, and has practical significance in the application of real-time prediction of electromagnetic wave propagation in a wide range of complex environments.
K-Terminal Network Permutation Importance Measure Based on Mixture C-Spectrum
Authors: Du Yongjun , Guo Yaqi , Cai Zhiqiang , Zhang Pan
Published: January 2020

The construction spectrum(C-spectrum) is often used to exploit the network reliability and importance measure. It depends only on the network structure and hence called structure invariant. Importance measure can be used to quantify the criticality of edge within a network. This paper aim at generalizing the traditional permutation importance measure to accommodate the case of K-terminal network in which all the edges fail with independent and equal probability. A concept for mixture C-spectrum is introduced to evaluate the permutation importance measure of edges. It is proved that the rankings according to the permutation importance measure depend only on the network structure through the mixture C-spectrum when the network has special structure or the reliability of edge is sufficient large. Finally, numerical experiment show that the Monte Carlo algorithm based on the mixture C-spectrum can be efficiently used to evaluate the permutation importance measure.
High-Order Spectral Difference Method on 3D Unstructured Grids via Mixed Elements
Authors: Qiu Zihua , Xu Min , Zhang Bin , Liang Chunlei
Published: January 2020

The high-order methods is difficultly applied in various elements. The development of a 3D solver by using the spectral difference method of unstructured grids via mixed elements is presented. A mixed tri-prism and tetrahedral grid is firstly refined using one-level h-refinement to generate a hexahedral grid while keeping the curvature of wall boundaries. The SD method designed for hexahedral elements can subsequently be applied for refining the unstructured grid. Through a series of numerical tests, the present method is high-order accurate for both inviscid and viscous flows is demonstrated; the results obtained for inviscid and viscous compressible flows compare well with other published results.
Application of Improved Quantum Genetic Algorithm in Optimization for Surface to Air Anti-Radiation Hybrid Group Force Deployment
Authors: Ji Junliang , Wang Minle , Shang Chang'an , Gao Jiale
Published: January 2020

In this paper, the concept and force deployment needs for anti-electronic jamming and defensing air of surface to air anti-radiation hybrid group was presented, the relationship between shield angle, deployment distance and effective electronic interference etc, were analyzed in the background of air raid battle which is with electronic support, force deployment optimization model of surface to air anti-radiation hybrid group was built based on the kill zone target function. In terms of the characteristic of hybrid group force deployment, quantum genetic algorithm (QGA) was improved with self-adaption rotation angle, the problem which was based on a living example was solved with improved QGA. By contrast, the improved QGA is better in the respects of global optimization, rate of convergence and stability than QGA, particle swarm optimization algorithm and quantum vortex algorithm in the problem of optimization for surface to air anti-radiation hybrid group force deployment.
Study on Temperature Characteristics of Ceramic Materials for Piezoelectric Actuators and Model Modification
Authors: Liu Nan , Liu Zhenming , Gong Xinrui , Huang Xinyuan , Xiong Chunyou
Published: January 2020

The performance of piezoelectric actuator ceramics under strong electric field(20 kV/cm) and variable temperature (30~150℃) were tested on a piezoelectric ceramic thermo-electro-mechanical multi-field loading test bench. The variation of hysteresis loop, strain loop, free capacitor and dielectric loss tangent with temperature was analyzed. A mathematical model of displacement characteristics of ceramic materials considering temperature effect is established, and the accuracy of the model is verified. The results show that the hysteresis loops become slender with the increasing of temperature, while the residual polarization, maximum polarization and coercive field decrease. The effect of the temperature on the residual polarization and coercive field is stronger than that on maximum polarization. The strain loop presents a typical butterfly curve, and the negative strain decreases gradually to 0.12% with the increasing of temperature. In the unipolar electric field, the residual polarization varies slightly with the increasing of temperature, and the maximum polarization increases about 40%. The piezoelectric constant of the material increases linearly. The free capacitor and dielectric loss tangent increases continuously. The higher the temperature, the greater the increase.
Study on Rotary Bending Forming Process of Torsional Damper Shell Pulley
Authors: Xue Kemin , Wu Chao , Yang Weizheng , Dai Guangxu , Li Ping , Yan Siliang
Published: January 2020

To study the integral forming process of torsion damper shell pulley with characteristic structure is of great significance for producing and developing of the rotational part such as shell pulley. A processing way was proposed by combining plate bending forming and roller structure design, to integral forming torsion damper shell pulley. A model for two-step bending forming was establishedvia finite element method. Under the radial feeding of roller, the outer edge of plate was subjected to compress thickening and secondary thickened after bending, and effective stress and metal flow in the deformation zone were analyzed by using marking point. Combining with the structural characteristics of shell pulley, a design criterion "rotating thickening, gathering thickening" of roller was proposed. The metal flow in deformation zone was effectively controlled through the characteristic structure of roller, thereby the specific region to forming multi-wedge toothwas obtained. The quantitative analysis of the instantaneous part section in the forming process, combining with the design criteria of roller structure and material flow rate, radius and arc angle of roller were determined. With the objective forming parameters, the comparison between the simulation results and the experimental are basically coincided, the ribs were fully formed and the specific regions was thickened to minimum value, which verified the feasibility of sheet-bulk metal rotary bending forming theory and the design criterion of roller structure.
Investigation on Dynamic Interaction of Multiple Clearance Joints for Flap Actuation System
Authors: Wan Qi , Geng Liu , Ma Shangjun , Tong Ruiting
Published: January 2020

A dynamic simulation model of the flap actuation system is developed in this paper to analyze the dynamic interaction behaviours of multiple clearance joints. The nonlinear contact force model and modified Coulomb friction model are adopted in the four clearance joints to capture their motion modes, including free flight mode, impact mode and continuous mode. The results show that there exists a strong dynamic interaction between different clearance joints and one impact motion mode in a joint will immediately affect other joints. And when the system reaches a stable state, the four clearance joints almost appears the similar tendency due to the rigid connection. Therefore, in order to accurately predict the dynamic responses of multibody system, it is essential for all joints to be modelled as imperfect ones.
Numerical Simulation of Slurry flow in horizontal pipe based on CFD-DEM
Authors: Fan Jinchao , Yao Benchun , Hao Yi , Zhang Shimin , Zhu Xiaoxiao
Published: January 2020

In this paper, we propose a novel pipeline cleaning method utilizing slurry. The reason why slurry can be used for pipeline cleaning is that the collisions between the particles and the contaminant in the pipe wall can enhance the cleaning effect. A slurry with polypropylene particles embedded in water is used to cleaning a horizontal pipe is conducted to realize this method. Because the flow characteristics of the slurry is crucial for the cleaning process, it is valuable to conduct a simulation and investigate the influence of several different factors including the convey velocity and the particle size. A 3D CFD-DEM model has been established. The indicators including pressure loss, particle accumulation level at the top of the pipe are choses to characterize the slurry flow and the influence of convey velocity and particle size has been investigated accordingly. In addition, an effective method is proposed to determine the critical convey velocity for each size of the particle.
Analytical Calculation of Annular Gap Throttling of Damping Valve
Authors: Chen Yijie , Gao Xiaodong , Han Xiaoling , Zhao Ning , Wan Yiqiang
Published: January 2020

For the throttling characteristics of the suspension system damping valve, an analytical method for gap throttling based on turbulent flow state was proposed for the first time. The boundary layer theory was used to give the expression of the three-layer velocity distribution of the fluid under turbulent flow state, and the analytical formula of the gap flow of the parallel plate was derived by the integral theorem. Compared with the numerical solution of CFD software, the error was very small, which verified the correctness of the equation. Based on the structural characteristics of the damping valve, the turbulent flow formula of the concentric annular gap was derived, and the influence of different physical parameters on the differential pressure and flow of the gap was analyzed, which lay the foundation for improving the design precision of the damping valve.
Modelling of Electro-mechanical Servo System Based on the Planetary Roller Screw Mechanism
Authors: Zhang Jianxin , Du Chuanming , Ma Shangjun , Liu Geng
Published: January 2020

Taking the electro-mechanical servo system as the research object, considering the contact stiffness, friction and clearance of the main components in the electro-mechanical servo system, the analysis model of the electro-mechanical servo system based on Planetary roller screw mechanism (PRSM) is established by using AMESim software. The results showed that the response speed of the system slowed down when the friction of PRSM was taken into account. The larger the clearance or the smaller the stiffness, the greater the fluctuation amplitude of the system response. After the controller was adjusted, the steady-state error of the system caused by the load force can be reduced quickly.
Design of the Landslide Multi-factor Monitoring System Based on the GNSS Technology
Authors: Qingjia Meng , Chenhui Wang , Wei Guo
Published: January 2020

Based on the multi-element monitoring of landslide, this paper adopts the GNSS technology to build the three-dimensional space monitoring system to research the landslide multi-element three- dimensional space monitoring technology. Through collecting the rainfall, soil moisture content, slope, pore water pressure, stress, single point surface deformation etc, the system has many key technologies such as multi-parameter, information acquisition, data fusion analysis and real-time early warning of landslides and integrate various elements by using the professional technology. This research provides an important reference for the landslide disaster prevention.
Modelling of Artificial Neural Network to control the cooling rate of a Laboratory Scale Run-Out Table
Authors: Prabir Biswas , Md Safwan Mondal , Saikat Mookherjee , Pranibesh Mandal
Published: January 2020

Run Out Tables (ROTs) have been used for long time in order to achieve different microstructure of steel in the industries. The microstructure of steel controlled by the cooling rate which in turn depends on various factors like the plate velocity, nozzle bank distance, coolant flow rate, and many others. Achieving new steel grade thus demand a proper combination setting of all such parameters. The observed data like upper nozzle distance, lower nozzle distance and mass flow rate of coolant from the laboratory scale ROTs are used to find out the cooling rate which is important parameter for achieving desired properties in steel. An Artificial Neural Network has been used here to creating an empirical relation between the observed data and thermodynamics parameter which will determine the cooling rate and validate it.
Anti-seismic characteristics of safety valve and its spring failure prediction analysis
Authors: Meng Fanrong , Zhang Huibing , Dai Ye , Zhang Hanbo , Wei Wenqiang , Liu Rui
Published: January 2020

Safety valve is an important guarantee for nuclear power plant system. Its working environment is harsh, and medium is high-temperature corrosive. It is important to study the dynamic characteristics of nuclear safety valve under unsteady condition to improve the stability and safety of nuclear power plant piping system. Using the finite element method, mass simplification and Rayleigh method, the frequency response analysis of the safety valve and the spring is predicted to predict the seismic capacity under the earthquake load. Based on the verification of the dynamic characteristics of the valve body, the stress and strain analysis of the spring is carried out. To explore the failure condition of the safety valve spring, the lateral deviation linearity of the spring was tested and analyzed by setting up the offset test bench. The results show that the safety valve with the above analysis method can meet the working requirements under the shaking condition. The research results provide an important theoretical basis for the design and analysis of nuclear safety valves.