bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Multiple Roles of Metal Ion Dopants in Spectrally Stable, Efficient Quasi‐2D Perovskite Sky‐Blue Light‐Emitting Devices
Authors: Li Cham Heng Angus , Geng Pai , Shivarudraiah Sunil Benachigere , Ng Michael , Zhang Xian‐Fu , Xu Baomin , Guo Liang , Halpert Jonathan E. 
Published: August 2021

AbstractPerovskite light‐emitting devices (peLEDs) have recently gained widespread attention as candidates for next‐generation display technologies. Red and green peLEDs have achieved over 20% external quantum efficiency (EQE), however blue peLEDs still lag behind. One proposed solution for improving the performance of blue peLEDs has been doping the perovskite films with metal ions, ostensibly to passivate surface trap sites and improve the EQE. Despite a few recent reports, however, the many roles of the metal ion dopants have not yet been fully explored. Here improvements in the EQE and spectral stability of quasi‐2D perovskites, often called 2D/3D or layered perovskites are reported. CsPbBr3−xClx sky‐blue emitting peLEDs, with a maximum EQE of 7.5%, and color stable spectra at high applied voltages are achieved, via doping with divalent metal ions at concentrations of 0.5 to 10%, by mole ratio. After screening several candidates, two metal ions are identified, Mn2+ and Mg2+ that are particularly effective, as compared with PEA‐based quasi‐2D control devices. Then these examples are used to study the effect of metal ions more generally on the film morphology, the hole transport layer's conductivity, the trap density, and the energy funneling dynamics, all of which strongly influence the device performance.
A CFD‐DEM study of the solid‐like and fluid‐like states in the homogeneous fluidization regime of Geldart A particles
Authors: Guo Qiang , Bordbar Alireza , Ma Likun , Yu Yaxiong , Xu Shuliang , Boyce Christopher M. , Ye Mao 
Published: August 2021

AbstractThe mechanisms underlying homogeneous fluidization of Geldart A particles have long been debated. Recent experiments shed fresh insights that both a solid‐like and a fluid‐like state exist. Herein, 3D computational fluid dynamics‐discrete element method simulations with the incorporation of interparticle van der Waals forces were performed for five typical Geldart A particles to investigate the bed structure in the homogeneous fluidization regime. Simulation results reproduce the existence of the solid‐like and fluid‐like states, showing that in the solid‐like state, particles have enduring and strong interparticle van der Waals forces that stabilize the bed to keep the bed stationary; while in the fluid‐like state, the interparticle van der Waals forces are dominated by the drag force, and particles show global circulation. Both interparticle van der Waals forces and friction are found to be necessary for the existence of the solid‐like state, and increasing the former has an effect to widen the solid‐like state.
Permselectivity improvement of PEBAX® 2533 membrane by addition of glassy polymers (Matrimid® and polystyrene) for CO2/N2 separation
Authors: Ansari Alireza , Navarchian Amir H. , Rajati Hajar 
Published: August 2021

AbstractTwo series of novel blend membranes based on poly(ether‐block‐amide) (PEBAX® 2533) and 5 and 10 wt% of two glassy polymers (Matrimid® and polystyrene [PS]) were prepared using a new mixed solvent with a low boiling point for CO2/N2 separation. Fourier‐transform infrared spectroscopy, field emission scanning electron microscopy, and X‐ray diffraction analyses were used to characterize the samples. A decrease in membrane crystallinity was observed by the addition of glassy polymers. The gas permeability measurements were performed to obtain CO2/N2 permselectivity of membranes. The maximum performance was found for the membrane with 5 wt% Matrimid content, for which CO2 permeability and CO2/N2 selectivity increased by 21% and 76%, respectively. Three permeation models were used to predict the CO2 permeability of blend membranes. The Maxwell model showed acceptable coincidence with the experimental data at 5 wt% content of the glassy polymer. For 10 wt% content of glassy polymer, the Lewis‐Neilson model showed the most accurate predictions for CO2 permeability. A method for quantitative comparison of membrane performance was also proposed by defining the geometric closeness to the Robson upper bound limit. Finally, it was found that an increase in the feed pressure improved the membrane performance at high pressures.
Osteophytes on the zygapophyseal (facet) joints of the cervical spine (C3–C7): A skeletal study
Authors: Ezra David , Kedar Einat , Salame Khalil , Alperovitch‐Najenson Deborah , Hershkovitz Israel 
Published: August 2021

AbstractPrevious studies have reported that osteophytes in the cervical vertebrae may cause immobility, neck stiffness, osteoarthritis, headaches, nerve entrapment syndromes, and compression of the vertebral artery. Our objective was to explore the osteophytes' expression on zygapophyseal joints C3–C7. This is a cross‐sectional observational skeletal study. The study sample comprised 273 human skeletons of both sexes, aged 20–93, housed at the Natural History Museum, OH, USA. A grading system assessed the presence and severity of osteophytosis on the zygapophyseal joints. The chi‐square test (SPSS 25.0) examined the association between osteophytes and demographic factors. The level of significance (α) was set at .05. The highest prevalence of osteophytes was found on C5 vertebra, the lowest on C7. On vertebrae C3, C4, C6, the rate of moderate and severe osteophytes found on the superior and inferior facets were comparable. Moderate and severe degrees of osteophytes were observed more frequently on the superior facets, whereas, on vertebra C7, osteophytes were found on the inferior facet joints. Osteophytes' prevalence was significantly higher in the elderly compared to the younger population. Osteophytes in the C3–C7 zygapophyseal joints are age‐dependent. No significant sex and ethnic differences were observed. Vertebra C5 was most prone to develop osteophytes, most probably due to its location in the cervical lordotic peak, C5 in the superior ZF; C7 in the inferior ZF are significant (p = .05). The zygapophyseal joints of C7 were least frequent overall, yet, the C7 inferior facets had significantly more moderate–severe osteophytes compared to other cervical vertebrae.
Synthesis and antioxidant properties of a novel arylamine antioxidant
Authors: Chao Mianran , Fan Rong , Zhang Lulu , Wang Xiaoyu , Shu Qianhui , Gao Jifeng , Chen Lele , Gong Peiwei , Shen Duyi 
Published: August 2021

AbstractA novel oil‐soluble arylamine antioxidant N1,N2‐diphenylethane‐1,2‐diamine (ND) was successfully synthesized, and the potential antioxidant behavior of which had never been reported before. The structure of ND was characterized via nuclear magnetic resonance (1H NMR, 13C NMR) and electron ionization mass spectrometry. The antioxidant performance of ND and its synergistic effect with 2,6‐di‐tert‐butyl‐4‐methylphenol (BHT) in di‐2‐ethylhexyl sebacate were evaluated by pressurized differential scanning calorimetry, thermogravimetry analysis, and hot oil oxidation test. All the results indicated that the synthesized antioxidant ND exhibited outstanding antioxidant performance and showed prominent synergistic effect with BHT in ester base oil. Furthermore, the probable synergistic anti‐oxidative effect between ND and BHT was discussed, which was mainly induced by the formation of a fresh BHT radical and the regeneration of ND antioxidant.
“We don't need a four‐year college person to come here and tell us what to do”: Community college curriculum making after articulation reform
Authors: Sowl Stephanie , Brown Michael 
Published: August 2021

AbstractThis article presents an instrumental case study of how community college faculty engages in academic planning in the wake of curricular policy reform, and tensions between the perspectives of faculty from 2‐ and 4‐year institutions. Implications of these dynamics are discussed with a focus on advice for those leading curricular change projects in community colleges.
Pericostal tuberculosis in a patient with systemic sclerosis:The relationship of two rare diseases
Authors: Takizawa Naoho , Mizutani Tetsushi , Fujita Yoshiro 
Published: August 2021

AbstractRegardless of immunosuppressant use, physicians should be aware of pulmonary and extra‐pulmonary tuberculosis in patients with autoimmune disease including systemic sclerosis, especially if they follow unusual clinical courses.
Intra‐amniotic levothyroxine infusions in a case of fetal goiter due to novel Thyroglobulin gene variants
Authors: Pollé Olivier G. , Gheldof Alexander , Lysy Philippe A. , Bernard Pierre 
Published: August 2021

AbstractIndications and administration of intra‐amniotic infusions of L‐thyroxine in the context of non‐immune fetal hypothyroidism with goiter lack of standardization. Systematic follow‐up of clinical features related to thyroid hormonal homeostasis may be useful to evaluate their efficiency and develop standardized management guidelines.
Outcomes of percutaneous balloon pulmonary valvuloplasty in congenital pulmonary valve stenosis
Authors: Yin Dan , Wu Xiaoyun , Xiang Ping , Zhang Yu , Tian Jie , Lv Tiewei , Yi Qijian , Li Mi 
Published: August 2021

AbstractPercutaneous balloon pulmonary valvuloplasty (PBPV) is the primary treatment for pulmonary valve stenosis (PVS). The study consisted of 228 children with PVS who underwent PBPV from January 2004 to October 2019 at a single center. The risk factors for ≥moderate pulmonary regurgitation (PR), residual stenosis, and restenosis were analyzed based on the baseline patient characteristics and measured value of corresponding inspection results. Among 228 patients, follow‐up results were obtained in 193 patients. The univariate analysis demonstrated that young age, low weight, small pulmonary annulus diameter, higher initial RV‐PA PSEG, increased RV/systemic pressure ratio, and severe PVS were associated with ≥moderate PR. The multivariate analysis demonstrated that higher initial RV‐PA PSEG and low weight were independently associated with ≥moderate PR, while higher initial RV‐PA PSEG was independently associated with residual stenosis and restenosis. PBPV is a preferred tre atment in PVS children with a higher success rate. Higher initial RV‐PA PSEG was a significant factor for ≥moderate PR, residual stenosis, and restenosis.
Reduction in seizure burden in a child with a A350V IQSEC2 mutation using heat therapy with a Jacuzzi
Authors: Levy Andrew P , Levy Nina S , Heyman Eli , Schertz Mitchell , Genizi Jacob 
Published: August 2021

AbstractA child with a A350V IQSEC2 missense mutation resulting in drug‐resistant epilepsy stops having seizures when he has a fever. We demonstrate that raising the body temperature of the child using a commercial Jacuzzi dramatically reduces his seizures and appears to improve his social behavioral interactions.
Clinical variability of recurrent oral HSV‐1 infection with a high level of serum IgG antibody: Three case reports
Authors: Zakiawati Dewi , Farisyi Muhammad Al , Wahyuni Indah Suasani 
Published: August 2021

AbstractRecurrent HSV‐1 infection has various clinical features. This case report addresses three differences in the oral clinical manifestation of HSV‐1 with the same high level of IgG titers reaching 200 U/mL. IgG antibody level indicates the state of recurrency but does not correlate with clinical features.
Early pregnancy‐associated ischemic stroke during first trimester in a young woman: A case report
Authors: Ouerdiene Asma , Messelmani Mariem , Mansour Malek , Zaouali Jamel , Mrissa Ridha 
Published: August 2021

AbstractPregnancy‐associated ischemic stroke is rare. The degree of the risk is the highest in the third trimester, but clinicians should be also wary from the beginning of the pregnancy as the risk still exists like demonstrated by our case.
Bilateral horizontal gaze palsy in an 8‐year‐old girl: A rare case with NDUFS4 gene mutation
Authors: Vafaee‐Shahi Mohammad , Ghasemi Saeide , Beiraghi Toosi Mehran , Ashrafi Mahmoud Reza , Badv Reza Shervin , Tavasoli Ali Reza , Tahernia Leila 
Published: August 2021

AbstractWe report a patient with complex clinical presentation including multiple neurological symptoms and eye involvement. Upon genetic investigation, the patient was found to carry a novel homozygous mutation in the NDUFS4 gene, thus adding to the heterogeneity of Leigh syndrome clinical presentation.
A rare etiology of mild encephalitis/encephalopathy with reversible splenial lesion
Authors: Shimono Hiroki , Hoshina Yoji , Ogawa Ei , Hayashi Akihito , Araki Midori , Muguruma Hiroaki , Mine Hideki , Yamamoto Akiyoshi 
Published: August 2021

AbstractLegionella is a rare cause of mild encephalitis/encephalopathy with reversible splenial lesion, which should be considered in patients with risk factors. Brain magnetic resonance imaging (MRI) and legionella urinary antigen test can help the diagnosis since cerebrospinal fluid (CSF) can be normal.
A case of appendix adenocarcinoma associated with ulcerative colitis
Authors: Fukumoto Yohsuke , Kobayashi Yuh , Takemura Shizuki , Maeda Kiyosumi , Nakamura Fumiyasu , Inatomi Osamu , Andoh Akira , Ban Hiromitsu 
Published: August 2021

AbstractUlcerative colitis (UC) is a chronic relapsing inflammatory disorder of the colon. Patients with UC have an increased risk of developing colorectal cancer. However, appendix adenocarcinoma associated with UC is extremely rare.
Development of pressureless sintered and hot‐pressed CNT/alumina composites including mechanical characterization
Authors: Bechteler Christian , Rübling Achim , Girmscheid Ralf , Kühl Hannes 
Published: August 2021

AbstractA process for the production of carbon nanotube (CNT)/alumina composites on the basis of an aqueous suspension and without any extensive pretreatment was developed. Pressureless sintering and hot‐pressing of the nanocomposites were extensively researched and optimized. The influence of varying CNT contents, different alumina powders, sintering temperature and pressure on mechanical properties were investigated. Optimal hot‐pressing conditions are specified at 1550°C, 15 min dwell time, and 80 MPa applied pressure. Dense nanocomposites up to 3 wt.% and 0.5 wt.% CNT content were achieved by hot‐pressing and pressureless sintering, respectively. Furthermore, a 20% increase in hardness for CNT contents below 1.0 wt.% was detected, which is independent from the applied force and the alumina matrix. A highly anisotropic fracture toughness at increased CNT contents was detected by an indentation‐based method. The developed process provides a possibility to produce CNT/alumina composites with improved mechanical properties under reasonable effort, which could also be used for industrial production.
Charging behaviour at the carbonate rock‐water interface in low‐salinity waterflooding: Estimation of zeta potential in high‐salinity brines
Authors: Singh Navpreet , Gopani Paras H. , Sarma Hemanta K. , Mattey Padmaja , Negi Digambar S. , Srivastava Vivek R. , Luxbacher Thomas 
Published: August 2021

AbstractThe study of zeta potential using electro‐kinetic analyzers that measure streaming potential has limitations of measurements to relatively low ionic strength solutions (<0.1 mol/L) due to the threshold limit of streaming potential signal above a certain limit of ionic strength. The objective of this study is to indirectly estimate the zeta potential for higher salinity brine using the zeta potential measurements for low salinity brine, develop an understanding of electrostatic shielding as predicted by the electric double layer (EDL) model, and overcome the limitation of the apparatus. Zeta potential become less negative as ionic strength increases, as per the Gouy–Chapman–Stern theory. It explains the suppression of electro‐kinetic phenomena due to the gradual compression of the diffuse layer. Our calculations show that the zeta potential and the Debye length become nearly constant at higher ionic strength. The ability to estimate zeta potential by the Gouy‐Chapman‐Stern theory at increasing ionic strength is limited. This theory predicts that the concentration of counter‐ions in the Stern layer increases with increasing ionic strength of the brine until the surface charge becomes neutralized and the diffuse layer collapses. However, it ignores the spatial extension of ions. It considers them as a point charge and may not accurately predict the zeta potential at higher ionic strength. The extent of diffuse layer compression is thus limited to the size of the hydrated counter‐ion. It is very unlikely that the measured zeta potential will become zero at higher ionic strength of brines and our calculations show the same.
Tunable System for Electrochemical Reduction of Ketones and Phthalimides
Authors: Wang Yaxin , Zhao Jianyou , Qiao Tianjiao , Zhang Jian , Chen Gong 
Published: August 2021

Main observation and conclusionHerein, we report an efficient, tunable system for electrochemical reduction of ketones and phthalimides at room temperature without the need for stoichiometric external reductants. By utilizing NaN3 as the electrolyte and graphite felt as both the cathode and the anode, we were able to selectively reduce the carbonyl groups of the substrates to alcohols, pinacols, or methylene groups by judiciously choosing the solvent and an acidic additive. The reaction conditions were compatible with a diverse array of functional groups, and phthalimides could undergo one‐pot reductive cyclization to afford products with indolizidine scaffolds. Mechanistic studies showed that the reactions involved electron, proton, and hydrogen atom transfers. Importantly, an N3/HN3 cycle operated as a hydrogen atom shuttle, which was critical for reduction of the carbonyl groups to methylene groups.
Multiphysics coupling numerical simulation of flow‐diverting stents in the treatment of patients with pulsatile tinnitus
Authors: Mu Zhenxia , Liu Li , Sun Yufeng , Gao Bin , Lv Han , Zhao Pengfei , Liu Youjun , Wang Zhenchang 
Published: August 2021

AbstractPatients with pulsatile tinnitus (PT) have unstable treatment effects after resurfacing surgery. Flow‐diverting stents (FDS) are proposed as a potential method for the treatment of PT, but the therapeutic effect is not clear. This study aimed to investigate the efficacy of FDS in the treatment of patients with PT induced by sigmoid sinus diverticulum (SSD) and sigmoid sinus wall dehiscence (SSWD). In addition, we aimed to explore the treatment mechanism of PT. Transient‐state multiphysics coupling numerical simulation method based on computed tomography angiography of five patients was used to clarify the biomechanical and acoustic states before and after FDS placement. FDS was placed to prevent the blood flow from impacting the vessel wall in the SSD and SSWD areas. Low blood flow velocity (<0.0391 m/s), high relative residence time (>10 Pa−1), and low wall shear stress of SSD might lead to thrombosis after FDS placement. The average pressure on the SSWD area of each patient decreased by 13.77%, 18.82%, 29.23%, 19.03%, and 11.20%. The average displacement of the vessel wall on the SSWD area showed acute pulsation and decreased by 15.29%, 14.64%, 30.22%, 41.03%, and 21.28%. The average sound pressure level at the tympanum decreased by 14.01%, 9.33%, 17.66%, 18.88%, and 25.18%, respectively. In brief, FDS was placed to avoid blood flow impacting vessels and reduce the vibration of vessels in the short term, thereby attenuating the degree of PT. The long‐term prognosis was that the SSWD area was blocked after SSD thrombosis. Therefore, FDS might be an effective method for the treatment of PT induced by SSD and SSWD. This study would provide a theoretical basis for the treatment of PT and an exploration of FDS design in the treatment of PT.
An investigation into the fastness and mechanical properties of p‐aramid fabric dyed with disperse dye
Authors: Iqbal Kashif , Rehman Abdur , Siddiqui Muhammad Owais Raza , Safdar Faiza , Basit Abdul , Maqsood Hafiz Shahzad , Azam Farooq 
Published: August 2021

AbstractThe p‐aramid fiber is mostly used in high tech applications such as protective clothing, cut resistant gloves, heat resistant suits, etc. due to its extraordinary mechanical and thermal properties. On the other hand, it loses its strength upon exposure to UV (ultraviolet) light. The main purpose of this work is to optimize p‐aramid fabrics dyeing with disperse dyes and study the impact of dye on its properties such as shade depth (K/S), fastness, and UV degradation. The batch process is used to dye the fabric with disperse dyes that give high K/S value. The ANOVA (analysis of variance) is performed for the result investigation, depicting the input and output variables relation. The mechanical loss of p‐aramid on exposure to UV was confirmed by bursting strength showing 28% strength loss in comparison to the dyed p‐aramid fabric having 15% loss in strength. This was further endorsed by scanning electron microscope and X‐ray diffraction by investigating the changes in surface morphology and crystallinity on exposure to UV simultaneously to confirm the hypothesis that dyeing reduces the degradation upon exposure to UV light.
A Model‐Based Workflow to Benchmark the Clinical Cholestasis Risk of Drugs
Authors: Baier Vanessa , Clayton Olivia , Nudischer Ramona , Cordes Henrik , Schneider Annika R. P. , Thiel Christoph , Wittenberger Timo , Moritz Wolfgang , Blank Lars M. , Neumann Ulf P. , Trautwein Christian , Kelm Jens , Schrooders Yannick , Caiment Florian , Gmuender Hans , Roth Adrian , Castell José V. , Kleinjans Jos , Kuepfer Lars 
Published: August 2021

We present a generic workflow combining physiology‐based computational modeling and in vitro data to assess the clinical cholestatic risk of different drugs systematically. Changes in expression levels of genes involved in the enterohepatic circulation of bile acids were obtained from an in vitro assay mimicking 14 days of repeated drug administration for 10 marketed drugs. These changes in gene expression over time were contextualized in a physiology‐based bile acid model of glycochenodeoxycholic acid. The simulated drug‐induced response in bile acid concentrations was then scaled with the applied drug doses to calculate the cholestatic potential for each compound. A ranking of the cholestatic potential correlated very well with the clinical cholestasis risk obtained from medical literature. The proposed workflow allows benchmarking the cholestatic risk of novel drug candidates. We expect the application of our workflow to significantly contribute to the stratification of the cholestatic potential of new drugs and to support animal‐free testing in future drug development.
How mediators use reformulation practices to de‐escalate risky moments
Authors: Maxwell Madeline M. , Ingram Matthew Bruce 
Published: August 2021

AbstractThis paper examines mediator reformulations when mediations seem close to falling apart. Our embodied approach to interaction analysis uses video‐recorded cases and shows how reformulations (summaries, paraphrases, reframings) are negotiated rather than offered as finished products. When mediators reformulate disputants' talk, their professional vision shapes how mediations progress, and disputants' uptake (or the lack of it) guides the directions they take. Whether it is bracketing off a touchy subject or disrupting a troublesome behavior loop, mediators' reformulation practices tell us about these mediators' professional vision through the story of observable practices.