bluuebunny/crossref_metadata_2025_split huggingface dataset:
Conventional osteosarcoma of the mandible: Report of a rare case
Authors: Mirmohammad Sadeghi Hassan , Karimi Abbas , Derakhshan Samira , Aminishakib Pouyan , Parchami Kiarash 
Published: September 2021

AbstractOsteosarcoma of the jaw can be successfully treated by a single aggressive surgical operation with good prognosis. Timely diagnosis, with a complete surgical removal of the tumor with clear margins, can fulfill favorable clinical results.
Respiratory failure and shock in an infant with severe anemia
Authors: Walker Shannon C. , Ransom Meaghan , Sood Shawn , Andrews Jennifer , Smith Christine M. 
Published: September 2021

AbstractPatients with severe anemia can present with non‐specific symptoms, including shock and respiratory distress. Ensuring a rapid, targeted workup is initiated and providing prompt transfusions as necessary are critical for both diagnostic success and clinical improvement.
Takayasu arteritis: A rare cause of chronic headache
Authors: Barasa Linda , Salyani Adil , Bika Jillo , Otieno Fredrick , Sokhi Dilraj 
Published: September 2021

AbstractChronic headache can be a presenting manifestation of Takayasu arteritis, although patients usually have other characteristic features. A thorough clinical assessment remains key in the evaluation of chronic headache.
A case report of interdigitating dendritic cell sarcoma originating from the oropharynx
Authors: Oikawa Shin‐ichi , Shiga Kiyoto , Katagiri Katsunori , Saito Daisuke , Ohashi Yu , Tsuchida Kodai , Miyaguchi Jun , Kusaka Takahiro 
Published: September 2021

AbstractInterdigitating dendritic cell sarcoma is an extremely rare tumor and typically originates from lymph nodes. Here, we report a patient with tumor originated from the oropharynx who received successful surgical treatment.
Time‐Resolved Spectroscopy and Electronic Structure of Mono‐and Dinuclear Pyridyl‐Triazole/DPEPhos‐Based Cu(I) Complexes
Authors: Grupe Merten , Boden Pit , Di Martino‐Fumo Patrick , Gui Xin , Bruschi Cecilia , Israil Roumany , Schmitt Marcel , Nieger Martin , Gerhards Markus , Klopper Wim , Riehn Christoph , Bizzarri Claudia , Diller Rolf 
Published: September 2021

AbstractChemical and spectroscopic characterization of the mononuclear photosensitizers [(DPEPhos)Cu(I)(MPyrT)]0/+(CuL,CuLH) and their dinuclear analogues (Cu2L’,Cu2L'H2), backed by (TD)DFT and high‐level GW‐Bethe‐Salpeter equation calculations, exemplifies the complex influence of charge, nuclearity and structural flexibility on UV‐induced photophysical pathways. Ultrafast transient absorption and step‐scan FTIR spectroscopy reveal flattening distortion in the triplet state ofCuLHas controlled by charge, which also appears to have a large impact on the symmetry of the long‐lived triplet states inCu2L’andCu2L'H2. Time‐resolved luminescence spectroscopy (solid state), supported by transient photodissociation spectroscopy (gas phase), confirm a lifetime of some tens of μs for the respective triplet states, as well as the energetics of thermally activated delayed luminescence, both being essential parameters for application of these materials based on earth‐abundant copper in photocatalysis and luminescent devices.
Local Field Induced Mass Transfer: New Insight into Nano‐electrocatalysis
Authors: Liu Yinghuan , Jiang Huijun , Hou Zhonghuai 
Published: September 2021

AbstractUnravelling the complex kinetics of electrocatalysis is essential for the design of electrocatalysts with high performance. Mass transfer and electron transfer are two primary factors that need to be optimized in order to enhance electrocatalytic reactions. The use of nanocatalysts proves to be a promising way of promoting the performance of electrocatalytic reactions, this improvement is usually attributed to their ability to enhance electron transfer. However, when catalysts are taken down to the nanoscale, their size is comparable to the thickness of an electrical double layer, so any curvature can lead to an inhomogeneous local electric field on the electrode, which then changes the mass transfer essentially. In this article, we introduce the new concept of local‐field‐induced mass transfer in nano‐electrocatalytic systems, and provide a brief review of recent progress, revealing its effect on nano‐electrocatalysis, which may bring new insight into the future design of nano‐electrocatalysts.
Lewis Acid‐Promoted Oxidative Addition at a [Ni0(diphosphine)2] Complex: The Critical Role of a Secondary Coordination Sphere
Authors: Zurakowski Joseph A. , Austen Brady J. H. , Dufour Maeve C. , Spasyuk Denis M. , Nelson David J. , Drover Marcus W. 
Published: September 2021

AbstractOxidative addition represents a critical elementary step in myriad catalytic transformations. Here, the importance of thoughtful ligand design cannot be overstated. In this work, we report the intermolecular activation of iodobenzene (PhI) at a coordinatively saturated 18‐electron [Ni0(diphosphine)2] complex bearing a Lewis acidic secondary coordination sphere. Whereas alkyl‐substituted diphosphine complexes of Group 10 are known to be unreactive in such reactions, we show that [Ni0(P2BCy4)2] (P2BCy4=1,2‐bis(di(3‐dicyclohexylboraneyl)‐propylphosphino)ethane) is competent for room‐temperature PhI cleavage to give [NiII(P2BCy4)(Ph)(I)]. This difference in oxidative addition reactivity has been scrutinized computationally – an outcome that is borne out in ring‐opening to provide the reactive precursor – for [Ni0(P2BCy4)2], a “boron‐trapped” 16‐electron κ1‐diphosphine Ni(0) complex. Moreover, formation of [NiII(P2BCy4)(Ph)(I)] is inherent to the P2BCy4 secondary coordination sphere: treatment of the Lewis adduct, [Ni0(P2BCy4)2(DMAP)8] with PhI provides [NiII(P2BCy4)2(DMAP)8(I)]I via iodine‐atom abstraction and not a [NiII(Ph)(I)(diphosphine)] compound – an unusual secondary sphere effect. Finally, the reactivity of [Ni0(P2BCy4)2] with 4‐iodopyridine was surveyed, which resulted in a pyridyl‐borane linked oligomer. The implications of these outcomes are discussed in the context of designing strongly donating, and yet labile diphosphine ligands for use in a critical bond activation step relevant to catalysis.
In vitro and Microbiological Assay of Functionalized Hybrid Nanomaterials To Validate Their Efficacy in Nanotheranostics: A Combined Spectroscopic and Computational Study
Authors: Mondal Susmita , Ghosh Ria , Adhikari Aniruddha , Pal Uttam , Mukherjee Dipanjan , Biswas Pritam , Darbar Soumendra , Singh Soumendra , Bose Surajit , Saha‐Dasgupta Tanusri , Pal Samir Kumar 
Published: September 2021

AbstractFunctionalized nanoparticles reveal new frontiers in therapeutics and diagnostics, simultaneously referred to as theranostics. Functionalization of an inorganic nanoparticle (NP) with an organic ligand determines the interaction of the functionalized NPs with various cellular components, leading to the desired therapeutic effect, while diminishing adverse side effects. Apart from the therapeutic effect of the nanoparticles, other physical properties of the organic‐inorganic complex (nanohybrid) including fluorescence, X‐ray or MRI contrast offer diagnosis of the anomalous target cell. In this study we functionalized Mn3O4 NPs with organic citrate (C−Mn3O4) and folic acid (FA−Mn3O4) ligands and investigated their antimicrobial activities using Staphylococcus hominis as a model bacteria, which can be remediated through their membrane rupture. While high‐resolution transmission microscopy (HR‐TEM), XRD, DLS, absorbance and fluorescence spectroscopy were used for structural characterisation of the functionalised NPs, zeta potential measurements and temperature‐dependent reactive oxygen speices (ROS) generation reveal their drug action. We used high‐end density functional theory (DFT) calculations to rationalise the specificity of the drug action of the NPs. Picosecond‐resolved FRET studies confirm the enhanced affinity of FA−Mn3O4 to the bacteria relative to C−Mn3O4, leading to enhanced antimicrobial activity. We have shown that the functionalised nanoparticles offer significant X‐ray contrast in in‐vitro studies, indicating the FA−Mn3O4 NPs to be a potential theranostic agent against bacterial infection.
Machine learning‐based load distribution and balancing in heterogeneous database management systems
Authors: Abdennebi Anes , Elakaş Anıl , Taşyaran Fatih , Öztürk Erdinç , Kaya Kamer , Yıldırım Sinan 
Published: September 2021

SummaryFor dynamic and continuous data analysis, conventional OLTP systems are slow in performance. Today's cutting‐edge high‐performance computing hardware, such as GPUs, has been used as accelerators for data analysis tasks, which traditionally leverage CPUs on classical database management systems (DBMS). When CPUs and GPUs are used together, the architectural heterogeneity, that is, leveraging hardware with different performance characteristics jointly, creates complex problems that need careful treatment for performance optimization. Load distribution and balancing are crucial problems for DBMSs working on heterogeneous architectures. In this work, focusing on a hybrid, CPU‐GPU database management system to process users' queries, we propose heuristical and machine‐learning‐based (ML‐based) load distribution and balancing models. In more detail, we employ multiple linear regression (MLR), random forest (RF), and Adaboost (Ada) models to dynamically decide the processing unit for each incoming query based on the response time predictions on both CPU and GPU. The ML‐based models outperformed the other algorithms, as well as the CPU and GPU‐only running modes with up to 27%, 29%, and 40%, respectively, in overall performance (response time) while answering intense real‐life working scenarios. Finally, we propose to use a hybrid load‐balancing model that would be more efficient than the models we tested in this work.
Electroreductive 5‐Hydroxymethylfurfural Dimerization on Carbon Electrodes
Authors: Kloth Ricarda , Vasilyev Dmitry V. , Mayrhofer Karl J. J. , Katsounaros Ioannis 
Published: September 2021

AbstractThe electrochemical conversion of biomass‐based compounds to fuels and fuel precursors can aid the defossilization of the transportation sector. Herein, the electrohydrodimerization of 5‐hydroxymethylfurfural (HMF) to the fuel precursor 5,5’‐bis(hydroxymethyl)hydrofuroin (BHH) was investigated on different carbon electrodes. Compared to boron‐doped diamond (BDD) electrodes, on glassy carbon (GC) electrodes a less negative HMF reduction onset potential and a switch in product selectivity from BHH to the electrocatalytic hydrogenation product 2,5‐di(hydroxymethyl)furan (DHMF) with increasing overpotential was found. On BDD, the electrohydrodimerization was the dominant process independent of the applied potential. An increase in the initial HMF concentration led to suppression of the competing hydrogen evolution reaction and DHMF formation, resulting in higher BHH faradaic efficiencies. In contrast, BHH selectivity decreased with higher initial HMF concentration, which was attributed to increased electrochemically induced HMF degradation. Finally, it was demonstrated that even a simple graphite foil can function as an active HMF electroreduction catalyst.
Rest and exercise oxygen uptake and cardiac output changes 6 months after successful transcatheter mitral valve repair
Authors: Vignati Carlo , De Martino Fabiana , Muratori Manuela , Salvioni Elisabetta , Tamborini Gloria , Bartorelli Antonio , Pepi Mauro , Alamanni Francesco , Farina Stefania , Cattadori Gaia , Mantegazza Valentina , Agostoni Piergiuseppe 
Published: September 2021

AbstractAimsChanges in peak exercise oxygen uptake (VO2) and cardiac output (CO) 6 months after successful percutaneous edge‐to‐edge mitral valve repair (pMVR) in severe primary (PMR) and functional mitral regurgitation (FMR) patients are unknown.The aim of the study was to assess the efficacy of pMVR at rest by echocardiography, VO2 and CO (inert gas rebreathing) measurement and during cardiopulmonary exercise test with CO measurement.Methods and resultsWe evaluated 145 and 115 patients at rest and 98 and 66 during exercise before and after pMVR, respectively.After successful pMVR, significant reductions in MR and NYHA class were observed in FMR and PMR patients. Cardiac ultrasound showed reverse remodelling (left ventricular end‐diastolic volume from 158 ± 63 mL to 147 ± 64, P < 0.001; ejection fraction from 51 ± 15 to 48 ± 14, P < 0.001; pulmonary artery systolic pressure (PASP) from 43 ± 13 to 38 ± 8 mmHg, P < 0.001) in the entire population. These changes were significant in PMR (n = 62) and a trend in FMR (n = 53), except for PASP, which decreased in both groups. At rest, CO and stroke volume (SV) increased in FMR with a concomitant reduction in arteriovenous O2 content difference [ΔC(a‐v)O2]. Peak exercise, CO and SV increased significantly in both groups (CO from 5.5 ± 1.4 L/min to 6.3 ± 1.5 and from 6.2 ± 2.4 to 6.7 ± 2.0, SV from 57 ± 19 mL to 66 ± 20 and from 62 ± 20 to 69 ± 20, in FMR and PMR, respectively), whereas peak VO2 was unchanged and ΔC(a‐v)O2 decreased.ConclusionsThese data confirm pMVR‐induced clinical improvement and reverse ventricular remodelling at a 6‐month analysis and show, in spite of an increase in CO, an unchanged exercise performance, which is achieved through a ‘more physiological’ blood flow distribution and O2 extraction behaviour. Direct rest and exercise CO should be measured to assess pMVR efficacy.
Bifunctional W/NH Cuboidal Aminophosphino W3S4 Cluster Hydrides: The Puzzling Behaviour behind the Hydridic‐Protonic Interplay
Authors: Guillamón Eva , Beltrán Tomás F. , Safont Vicent S. , Castillo Carmen E. , Algarra Andrés G. , Fernández‐Trujillo M. Jesús , Pedrajas Elena , Pino‐Chamorro José Angel , Basallote Manuel G. , Llusar Rosa 
Published: September 2021

AbstractThe novel [W3S4H3(edpp)3]+ (edpp=(2‐aminoethyl)diphenylphosphine) (1+) cluster hydride with an acidic −NH2 functionality has been synthetized and studied. Its crystal structure shows the characteristic incomplete W3S4 cubane core with the outer positions occupied by the P and N atoms of the edpp ligands. Although no signal due to the hydride ligands is observed in the 1H NMR spectrum, hydride assignment is supported by 1H‐15N HSQC techniques, the changes in the 31P{1H} NMR chemical shift, and FT‐IR spectra in the W−H region of the deuterated [W3S4D2H(edpp)3]+ (1+‐d2) samples. Moreover, all NMR evidences suggest that one of the hydrogen atoms of the NH2 group in 1+ is rapidly exchanging with the hydride. The reaction of 1+ with acids (HCl, HBr and DCl) features complex polyphasic kinetics with zero‐order dependence with respect to the acid concentration, being also independent of the solvent nature. This behavior differs from that of their diphosphino analogues, suggesting a different mechanism.
Radial basis function interpolation supplemented lattice Boltzmann method for electroosmotic flows in microchannel
Authors: Guo Panpan , Qian Fang , Zhang Wenyao , Yan Huilong , Wang Qiuwang , Zhao Cunlu 
Published: September 2021

AbstractLarge gradients of physical variables near the channel walls are characteristic of EOF. The previous numerical simulations of EOFs with the lattice Boltzmann method (LBM) utilize uniform lattice and are not efficient, especially when the electric double layer (EDL) thickness is significantly smaller than the channel height. The efficient LBM simulation of EOF in microchannel calls for a nonuniform mesh which is dense in the EDL region and sparse in the bulk region. In this article, we formulate a radial basis function (RBF)‐based interpolation supplemented LBM (ISLBM) to solve the governing equations of EOF, that is, the Poisson, Nernst–Planck, and Navier–Stokes equations, in a nonuniform mesh system. Unlike the conventional ISLBM, the RBF‐ISLBM determines the prestreaming distribution functions by using the local RBF‐based interpolation over circular supporting regions and is particularly suitable for nonuniform meshes. The RBF‐ISLBM is validated by the EOFs in infinitely long and finitely long microchannels. The results show that the RBF‐ISLBM possesses excellent robustness and accuracy. Finally, we use the RBF‐ISLBM to simulate the EOFs with the hitherto highest electrokinetic parameter, κa, defined by the ratio of channel height a to EDL thickness κ−1, in LBM simulations of EOF.
A Paraffin Microtomy Method for Improved and Efficient Production of Standardized Plastic Microfibers
Authors: Knauss Christine M. , Dungan Christopher F. , Lehmann Stuart A. 
Published: September 2021

Abstract
Microfibers are one of the most abundant microplastic particle types found in the environment, where they cause negative impacts on organisms and possibly on human health. Microfibers should be included in a wide range of laboratory studies; however, microfibers for scientific studies are not commercially available. Current methods to make microfibers generally create particles with large size ranges and poor precision, and efficient production of particles ≤100 µm is difficult. Laboratory studies of the biological and toxicological effects and chemical interactions of microfibers require uniform, small microfibers in sufficient numbers for environmentally relevant experiments. We developed a novel fiber embedding technique and modified a seminal cryomicrotomy method to produce precise microfibers in quantities suitable for environmentally relevant concentrations. Polyethylene terephthalate (PET) and nylon fibers were strategically wound onto a spindle, embedded in paraffin wax, and sectioned using a standard paraffin microtome. After processing with a suitable organic solvent to remove the wax, microfiber size distributions were assessed. The small microfibers (10–42 µm) were accurate to the target lengths with excellent precision and a production rate ≥13.5 times higher than previous methods. As a proof of application, three lengths of manufactured PET fibers were stained with Nile red and exposed to eastern oyster larvae (Crassostrea virginica) for 24 h. Larvae ingested the smaller fiber lengths (14 and 28 µm), and the Nile red–stained fibers were visible and distinguishable in the guts of the larvae. This experiment was the first to demonstrate ingestion of plastic particles other than microspheres by oyster larvae. The present method facilitates the use of small microfibers in laboratory experiments, allowing for a more complete understanding of microplastic effects in the environment. Environ Toxicol Chem 2022;41:944–953. © 2021 SETAC
Study on the merged flame height and radiative heat flux distribution from square propane fire arrays
Authors: Yu Longxing , Wan Huaxian , Ji Jie 
Published: September 2021

SummaryThe remote ignition and accelerated flame spread in multiple fires accidents are mainly due to the thermal radiation. The merged flame height and external radiative heat flux distribution of the square fire arrays were investigated numerically. Different burner spacing, total number of burners and heat release rate (HRR) of an individual burner were considered. Results show that the fire plume centerline temperature can be predicted accurately by achieving grid independence on a fine enough grid. A correlation for predicting the merged flame height of the multiple fires is developed involving the number of burners, HRR of each burner and burner spacing. The comparison of calculated and simulated data in this work validated the accuracy of the proposed correlation. The radiative heat flux distributions surrounding the fire array can be divided into two regions, that is, the near‐ and far‐field regions. The total heat release rate of the fire array is shown to be the dominant effect on the radiation distribution throughout the whole region, whilst the burner spacing is shown to only have an effect in the near‐field region. To distinguish the two regions, the critical distance of 0.7 ( is the characteristic fire array length) was obtained.
Effect of solid state fermentation on proximate composition, antinutritional factors and in vitro protein digestibility of maize flour
Authors: Terefe Zemenu K. , Omwamba Mary N. , Nduko John M. 
Published: September 2021

AbstractCereals including maize generally have limiting amino acids particularly lysine. In most cases, spontaneous fermentation is used to improve the nutritional profiles of maize‐based products. However, in such fermentation, biological risks including the presence of pathogenic microorganisms, chemical contaminants, and toxic compounds of microbial origin such as mycotoxins pose a health risk. The aim of this study was, therefore, to improve the nutritional properties of maize flour by reducing antinutritional factors through microbial fermentation by strains of Lactobacillus plantarum and Saccharomyces cerevisiae and their cocultures. A factorial experimental design was used to evaluate the effect of fermentation setups and time on proximate composition, antinutritional factors, and in vitro digestibility of proteins in maize flour. During 48 h of fermentation, protein content was improved by 38%, 55%, 49%, and 48%, whereas in vitro protein digestibility improved by 31%, 40%, 36%, and 34% for natural, Lactobacillus plantarum, Saccharomyces cerevisiae, and their coculture‐fermented maize flour, respectively. The highest improvement in protein content and its digestibility was observed for Lactobacillus plantarum strain‐fermented maize flour. Phytate, tannin and trypsin inhibitor activity were reduced significantly (p < .05) for natural, Lactobacillus plantarum, Saccharomyces cerevisiae, and coculture‐fermented maize flour. The highest reduction of phytate (66%), tannin (75%), and trypsin inhibitor (64%) was observed for coculture‐fermented maize flour. The two strains and their cocultures were found feasible for fermentation of maize flour to improve its nutritional profiles more than the conventional fermentation process.
Transient temperature‐pressure field model of supercritical CO2 fracturing wellbore with tubing and annulus co‐injection
Authors: Wu Lin , Luo Zhifeng , Zhao Liqiang , Zhang Nanling , Yao Zhiguang , Jia Yucheng 
Published: September 2021

AbstractThe physical parameters of supercritical carbon dioxide (SC‐CO2) fracturing fluid are sensitive to temperature and pressure. Accurate prediction of wellbore temperature and pressure during injection is critical for the fracturing efficiency. In this paper, a transient pressure‐field model of SC‐CO2 fracturing wellbore with tubing and annulus co‐injection was established, which was adjusted to consider the Joule–Thomson effect, axial heat conduction, expansion/compression heat, and friction heat. The model predicted the variation patterns of wellbore temperature and pressure, comparing them with those under tubing injection conditions. Effects of tubing‐annulus injection ratios and endothermic mode on bottom‐hole temperature (BHT) and wellhead pressure (WHP) were analyzed in detail. Compared with pure tubing injection, co‐injection provided higher BHT and lower WHP. At constant BHP, WHP dropped with time in the processes of tubing injection or co‐injection, while the former provided a larger WHP drop. With an increase in tubing injection ratio, the difference between tubing and annulus BHT values slightly grew. When the tubing and annulus injection displacements were allocated according to their cross‐sectional area ratio, their WHP was minimal. If CO2 was assumed to absorb all the friction heat, overestimation of BHT and WHP would be observed, which was more pronounced at larger injection displacements. This study's findings are considered instrumental in the design optimization and field application of SC‐CO2 fracturing in unconventional reservoirs. © 2021 Society of Chemical Industry and John Wiley & Sons, Ltd.