bluuebunny/crossref_metadata_2025_split huggingface dataset:
Synthesis and Characterization of Novel Pd@rGO−CuFe2O4 Magnetic Nanoparticles: A Recyclable Catalyst for C−C Coupling Reaction in Biomass‐Derived Organic Solvent
Authors: Teli Yaqoob A. , Reetu Reetu , Singh Priyanka Gurdev , Patel Mayur Jagdishbhai , Dash Sonali , Paine Snehangshu , Prabhakar Poornachandra Shamanna , Singh Virender , Keremane Kavya S. , Al‐Zaqri Nabil , Mukherjee Kalisadhan , Dutta Saikat , Malakar Chandi C. 
Published: October 2023

AbstractDevelopment of new, cost effective, stable heterogeneous catalyst for the organic transformations is an important thematic area of research. Present work describes the development of new Pd@rGO−CuFe2O4 catalyst and demonstrates its effectiveness for Suzuki‐Miyaura type coupling reactions. The additional advantage of this reaction is its feasibility using biomass‐derived solvent like γ‐Valerolactone (GVL) in aqueous media. The catalyst is prepared hydrothermally and characterized using XRD, FESEM, EDX, and XPS analysis. The catalyst exhibits excellent activity and recyclability (up to six times) in the C−C coupling reaction to deliver the corresponding biaryl molecules in yields up to 90 %. High efficiency for the conversion of nitriles to amides is also revealed by the prepared catalyst.
Synthese und Charakterisierung eines stabilen Nickelocenium‐Dikation‐Salzes
Authors: Rall Jan M. , Lapersonne Max , Schorpp Marcel , Krossing Ingo 
Published: October 2023

AbstractWir berichten über die Synthese und Charakterisierung der Nickelocenium‐Kationen [NiCp2]⋅+ und [NiCp2]2+ als deren [F‐{Al(ORF)3}2]− (Cp = C5H5; RF=C(CF3)3) Salze. Das diamagnetische [NiCp2]2+ ist das erste Beispiel für die Isolierung eines unsubstituierten Metallocen Dikations. Beide Salze wurden durch Reaktion von neutralem NiCp2 mit [NO]+[F‐{Al(ORF)3}2]− in 1,2,3,4‐Tetrafluorbenzol (4FB) erzeugt. Die Salze konnten durch Einkristall‐Röntgenbeugung charakterisiert werden, wobei kürzere Metall‐Ligand‐Bindungslängen für das höher geladene Salz gemessen wurden. Pulver‐Röntgenbeugung zeigte, dass die Salze phasenrein erhalten wurden. Cyclovoltammetrie in 4FB ergab quasi‐reversibel Redoxwellen bei −0.44 (0→1) und +1.17 V (1→2) gegen Fc/Fc+. Das 1H NMR von [NiCp2]2+ weist ein Singulett bei 8.6 ppm auf, während das paramagnetische [NiCp2]⋅+ deutlich Hochfeld auf −103.1 ppm verschoben ist.
Synthesis and Characterization of a Stable Nickelocenium Dication Salt
Authors: Rall Jan M. , Lapersonne Max , Schorpp Marcel , Krossing Ingo 
Published: October 2023

AbstractWe report the synthesis and characterization of the nickelocenium cations [NiCp2]⋅+ and [NiCp2]2+ as their [F‐{Al(ORF)3}2]− (Cp = C5H5; RF=C(CF3)3) salts. Diamagnetic [NiCp2]2+ represents the first example for the isolation of an unsubstituted parent metallocene dication. Both salts were generated by reacting neutral NiCp2 with [NO]+[F‐{Al(ORF)3}2]− in 1,2,3,4‐tetrafluorobenzene (4FB). The salts were characterized by single crystal X‐ray diffraction (XRD), indicating shorter metal‐ligand bond lengths for the higher charged salt. Powder XRD shows the salts to be phase pure, cyclic voltammetry in 4FB gave quasi reversible redox waves at −0.44 (0→1) and +1.17 V (1→2) vs Fc/Fc+. The 1H NMR of [NiCp2]2+ is a singlet at 8.6 ppm, whereas paramagnetic [NiCp2]⋅+ is significantly shifted upfield to −103.1 ppm.
Singlet‐Triplet Energy Inversion in Carbon Nitride Photocatalysts
Authors: Actis Arianna , Melchionna Michele , Filippini Giacomo , Fornasiero Paolo , Prato Maurizio , Chiesa Mario , Salvadori Enrico 
Published: October 2023

AbstractTime‐resolved EPR (TR‐EPR) demonstrates the formation of well‐defined spin triplet excitons in carbon nitride. This permits to experimentally probe the extent of the triplet wavefunction which delocalizes over several tri‐s‐triazine units. Analysis of the temperature dependence of the TR‐EPR signal reveals the mobility of the triplet excitons. By employing monochromatic light excitation in the range 430–600 nm, the energy of the spin triplet is estimated to be ≈0.2 eV above the conduction band edge, proving that the triplet exciton lies above the corresponding singlet. Comparison between amorphous and graphitic forms establishes the singlet‐triplet inversion as a general feature of carbon nitride materials.
Calix[4]arene‐based Supramolecular Gels for Mercury Ion Removal in Water
Authors: Chen Tyng‐Rong , Chang Kai‐Chi , Chen Chan‐Yu , Wu Ting‐Wen , Lee Li‐Wei , Shen Li‐Ching , Chen Hsin‐Ni , Chung Wen‐Sheng 
Published: October 2023

AbstractA calix[4]arene‐based gelator 1, with lower‐rim mono triazolylpyridine group, capable of spontaneous self‐assembly into microspheres in different ethanol/H2O mixtures, is synthesized. The concentration‐dependent 1H NMR spectra and X‐ray single‐crystal structure of 1 provided evidence for self‐assembly of gelator 1 via cooperative interactions of intermolecular noncovalent forces. Furthermore, metallogels by self‐assembly of 1 was found to exhibit remarkable selectivity toward Hg2+ ions. 1H NMR spectra support that Hg2+ ion was bound to the nitrogen atoms of two coordination sites of 1, which composed of triazole and pyridine. Moreover, the results of field emission scanning electron microscopy and rheology experiments indicated that Hg2+ ions not only enhanced the gelling ability of gelator 1 in ethanol but also led to morphological change of its self‐assembly through metal‐ligand interactions. Finally, the in situ gelation, triggered by mixing a gelator solution of 1 in ethanol with water samples such as deionized (DI), tap, and lake water, leads to the effective removal of Hg(II) from a water sample which reduced from 400 to 1.6 ppm.
Robust control design of an air‐breathing engine for a supersonic vehicle using backstepping and UKF
Authors: Maity Arnab , Padhi Radhakant 
Published: October 2023

AbstractThis paper presents an efficient robust control design approach for an air‐breathing engine for a supersonic vehicle using the Lyapunov stability theory based nonlinear backstepping control, augmented with unscented Kalman filter (UKF). The primary objective of the control design is to ensure that the thrust produced by the engine tracks the commanded thrust by regulating the fuel flow to the combustion chamber. Moreover, as the engine operates in a supersonic range, an important secondary objective is to manage the shock wave location in the intake for maximum pressure recovery with adequate safety margin by varying the throat area of the nozzle simultaneously. To estimate the states and parameters as well as to filter out the process and sensor noises, a UKF has been incorporated for robust output feedback control computation. Furthermore, independent control designs for the actuators have been carried out to assure satisfactory performance of the engine. Additionally, a guidance loop is designed to generate a typical flight trajectory of the representative vehicle using a nonlinear suboptimal input constrained model predictive static programming formulation for testing the performance of the engine. Simulation results clearly indicate quite successful robust performance of the engine during both climb and cruise phases.
Maternal–fetal safety evaluation of an aqueous extract of Casearia sylvestris leaves in rats
Authors: Nagaoka Livia Trippe , Jorge Bárbara Campos , Stein Júlia , Manoel Beatriz de Matos , Valente Leticia Cardoso , de Toledo Laura Leonel , de Castro Thiago Luis Aguayo , Kassuya Cândida Aparecida Leite , Cardoso Claudia Andrea Lima , Arena Arielle Cristina 
Published: October 2023

AbstractBackgroundThis study evaluated the maternal, embryotoxic, and teratogenic effects of the aqueous extract of Casearia sylvestris (AECS), a species listed in the Unique Health System of Brazil, and widely used for treating several conditions, such as diarrhea, wounds, pain, and ulcers.MethodsPregnant rats were daily treated orally with 0, 175, 350, or 700 mg/kg/body weight of AECS, from gestational day (GD) 6 to 15 (organogenesis period). On GD 20, the pregnant rats were euthanized, and the litters submitted to an assessment of fetal development.ResultsNo clinical signs of toxicity were observed in the dams during the treatment. In the embryo‐fetal development study, a significant increase in the basal zone height of the placenta was observed in the intermediate dose group. Furthermore, there was a significant increase in the relative anogenital distance measurement of female fetuses in the lowest and intermediate dose groups. Although no visceral abnormalities were observed in the treated‐fetuses, skeletal anomalies evidenced by changes in the ossification of the sternum and the presence of supernumerary ribs were found in the intermediate and high dose groups.ConclusionIn conclusion, the treatment with AECS during organogenesis at this dose level had detrimental effects on the normal development of fetuses.
Predictive value of ceruloplasmin for metabolic syndrome in adolescents
Authors: González‐Jiménez Emilio , Schmidt‐Riovalle Jacqueline , Sinausía Laura , Carmen Valenza Maríe , Perona Javier S. 
Published: October 2023

AbstractThe metabolic syndrome (MetS) is precisely defined and the cardiovascular risk associated with the clustering of its components has been demonstrated in adults. However, data on children and adolescents are still scarce, in part, because of difficulties in transposing the definition from adults. The identification of risk factors for the development of MetS at an early age is essential for prevention purposes with low‐grade inflammation acting as a determinant for the association among the MetS components. The aim of this study was to investigate the associations of the MetS with systemic markers of inflammation and ceruloplasmin in a population of adolescents. The present is a cross‐sectional study whose sample population consisted of 976 adolescents, 13.2 ± 1.2 years of age. Interleukin‐6 (IL‐6) and tumor necrosis factor‐α (TNF‐α) were determined by ELISA. High‐sensitivity C‐reactive protein (hs‐CRP) was determined by a solid‐phase chemiluminiscent immunometric assay. Ceruloplasmin was measured by immunoturbidimetry. MetS adolescents exhibited higher levels of TNF−α, IL‐6, CRP, and ceruloplasmin compared to non‐MetS individuals. TNF−α, IL‐6, and CRP showed strong correlations with the MetS components and insulin resistance but not relevant predictive values according to ROC curves (AUC values 0.544‐ 0.555). In contrast, ceruloplasmin only showed significant correlations in non‐Mets individuals, but exhibited a very high predictive value (AUC=0.941, P < 0.001). The determination of serum ceruloplasmin in adolescents might be a useful tool to identify patients with the highest risk of future cardiovascular disease. © 2016 BioFactors, 42(2):163–170, 2016
Cardiac troponins—Translational biomarkers in cardiology: Theory and practice of cardiac troponin high‐sensitivity assays
Authors: Adamcova Michaela , Popelova‐Lencova Olga , Jirkovsky Eduard , Simko Fedor , Gersl Vladimir , Sterba Martin 
Published: October 2023

AbstractTn is a unique translational biomarker in cardiology whose potential has not been diminished in the new era of high sensitive assays. cTns can be valuable markers in cardiac diseases as well as in infectious diseases and respiratory diseases. Furthermore, the role of cTns is growing in the routine evaluation of cardioxicity and in determining the efficacy/safety ratio of novel cardioprotective strategies in clinical settings. cTns can detect myocardial injury not only in a wide spectrum of laboratory animals in experimental studies in vivo, but also in isolated heart models or cardiomyocytes in vitro. The crucial issue regarding the cross‐species usage of cardiac troponin investigation remains the choice of cardiac troponin testing. This review summarizes the recent proteomic data on aminoacid sequences of cTnT and cTnI in various species, as well as selected analytical characteristics of human cardiac troponin high‐sensitivity assays. Due to the highly phylogenetically conserved structure of troponins, the same bioindicator can be investigated using the same method in both clinical and experimental cardiology, thus contributing to a better understanding of the pathogenesis of cardiac diseases as well as to increased effectiveness of troponin use in clinical practice. Measuring cardiac troponins using commercially available human high‐sensitivity cardiac troponin tests with convenient antibodies selected on the basis of adequate proteomic knowledge can solve many issues which would otherwise be difficult to address in clinical settings for various ethical and practical reasons. Our survey could help elaborate the practical guidelines for optimizing the choice of cTns assay in cardiology. © 2016 BioFactors, 42(2):133–148, 2016
Personalized, parcel‐guided rTMS for the treatment of major depressive disorder: Safety and proof of concept
Authors: Tang Si Jie , Holle Jonas , Dadario Nicholas B. , Lesslar Olivia , Teo Charles , Ryan Mark , Sughrue Michael , Yeung Jacky T. 
Published: October 2023

AbstractBackgroundNot all patients with major depressive disorder (MDD) benefit from the US Food and Drug Administration‐approved use of repetitive transcranial magnetic stimulation (rTMS) at the dorsolateral prefrontal cortex. We may be undertreating depression with this one‐size‐fits‐all rTMS strategy.MethodsWe present a retrospective review of targeted and connectome‐guided rTMS in 26 patients from Cingulum Health from 2020 to 2023 with MDD or MDD with associated symptoms. rTMS was conducted by identifying multiple cortical targets based on anomalies in individual functional connectivity networks as determined by machine learning connectomic software. Quality of life assessed by the EuroQol (EQ‐5D) score and depression symptoms assessed by the Beck Depression Inventory (BDI) were administered prior to treatment, directly after, and at a follow‐up consultation.ResultsOf the 26 patients treated with rTMS, 16 (62%) attained remission after treatment. Of the 19 patients who completed follow‐up assessments after an average interval of 2.6 months, 11 (58%) responded to treatment and 13 (68%) showed significant remission. Between patients classified with or without treatment‐resistant depression, there was no difference in BDI improvement. Additionally, there was significant improvement in quality of life after treatment and during follow‐up compared to baseline.LimitationsThis review is retrospective in nature, so there is no control group to assess the placebo effect on patient outcomes.ConclusionThe personalized, connectome‐guided approach of rTMS is safe and may be effective for depression. This personalized rTMS treatment allows for co‐treatment of multiple disorders, such as the comorbidity of depression and anxiety.
A New Open Humanities: Introduction
Authors: McLaughlin Jeremy L. 
Published: October 2023

EDITOR'S SUMMARYThe third annual Virtual Symposium on Information & Technology in the Arts & Humanities, held on April 18 and 19, 2017, centered on a theme of open science in the humanities. Presentations at the Symposium have included topics such as data visualization, historical images, interactive exhibits and linked data. The 2017 theme of open humanities was a starting point for the speakers to consider how open science has and can impact the world of humanities in various ways. Speakers at the symposium discussed analyzing writing practices on the internet using web scrapers, data management in the humanities, visual literacy skills of graduate and undergraduate students and the challenge researchers face in trying to keep up with publications in their field.
Extraction and Characterization of Bioactive Compounds from Diverse Marine Microalgae and Their Potential Antioxidant Activities
Authors: Zhou Linhui , Duan Xinyu , Li Kunning , Hill David R. A. , Martin Gregory J. O. , Suleria Hafiz A. R. 
Published: October 2023

AbstractThis study compared free and bound phenolic compounds in various marine microalgae species. It assessed total phenolic content (TPC), total flavonoid content (TFC) and total condensed tannin content (TCT) and their antioxidant capacities using 2,2‐diphenyl‐1‐picrylhydrazyl (DPPH) assay, 2,2’‐azinobis(3‐ethylbenzothiazoline‐6‐sulfonic acid) (ABTS⋅+) radical cation‐based assay and ferric ion reducing antioxidant power assay. Liquid chromatography‐mass spectrometry (LC–MS) was also employed to characterize the phenolic profiling. Results showed that free phenolic compounds ranged from 1.83–6.45 mg GAE/g d. w., while bound phenolic compounds ranged from 4.03–26.03 mg GAE/g d. w., indicating significant differences. These variations were consistent across assays, highlining unique profiles in different species. A total 10 phenolics were found in these seven microalgae, including 1 phenolic acid, 6 flavonoids, 1 other polyphenol and 2 lignans. 4′‐O‐methyl‐(−)‐epigallocatechin 7‐O‐glucuronide and chrysoeriol 7‐O‐glucoside in microalgae were firstly reported in microalgal samples. These findings have implications for future applications in industries.
Controlled Construction of Core‐Shell Structured Prussian Blue Analogues towards Enhanced Oxygen Reduction
Authors: Tian Han , Chen Chang , Yu Ziyi , Luo Wenshu , Yu Xu , Chang Ziwei , Li Shujing , Cui Xiangzhi , Shi Jianlin 
Published: October 2023

AbstractMetal‐organic frameworks‐based electrocatalysts have been developed as highly desirable and promising candidates for catalyzing oxygen reduction reaction (ORR), which, however, usually need to be prepared at elevated temperatures and may suffer from the framework collapse in water environments, largely preventing its industrial application. Herein, this work demonstrates a facile low‐temperature ion exchange method to synthesize Mn and Fe co‐loaded Prussian blue analogues possessing core‐shell structured frameworks and favorable water‐tolerance. Among the catalysts prepared, the optimal HMPB‐2.6Mn shows a high ORR electrocatalytic performance featuring a half‐wave potential of 0.86 V and zinc‐air battery power density of 119 mW cm−2, as well as negligible degradation up to 60 h, which are comparable to commercial Pt/C. Such an excellent electrocatalytic performance is attributed to the special core‐shell‐like structure with Mn concentrated in outer shell, and the synergetic interactions between Mn and Fe, endowing HMPB−Mn with outstanding ORR activity and good stability.
Energy‐efficient adaptive clustering (EEAC) with rendezvous nodes and mobile sink
Authors: Gupta Pushpendra Kumar , Verma Akshay , Gupta Prateek , Maheshwari Om , Singhal Anant , Kumar Manoj 
Published: October 2023

SummaryWireless sensor networks are an indispensable part of the present industrial and environmental scenario, with the everlasting challenges to increase network lifetime and reduce energy consumption. This paper presents an energy‐efficient adaptive clustering (EEAC) model, which is built upon the existing Low Energy Adaptive Clustering Hierarchy (LEACH) protocol with mobile sink and rendezvous nodes. The nodes are energy aware and participate in cluster head selection only if their current energy is higher than the average energy for the round. The idle nodes in the rendezvous region, which do not act as rendezvous nodes undergo clustering within themselves for the efficient routing of data. The EEAC inspires local clustering successfully conserves the energy of continuous long‐range transmission and enhances network lifetime. The proposed scheme proves to be remarkably better than the previous schemes, especially in large network cross‐sections. It improves alive nodes' performance for around 50% more rounds than the optimizing‐LEACH and the remaining energy curves improve around 500 rounds for 250 mx250 m network. For 350 mx350 m and 450 mx450 m networks, the results improved much in EEAC. In addition, the improvement in stability period is 450%, 578%, and 198% for the network cross‐section 150 mx150 m, 200 mx200m, and 250 mx250 m, respectively.
Morphological and transcriptomic responses/acclimations of erect‐type submerged macrophyteHydrilla verticillataboth at low‐light exposure and light recovery phases
Authors: Guo Qingchun , Gao Yuxuan , Song Chao , Zhang Xinhou , Wang Guoxiang 
Published: October 2023

AbstractLight intensity is a determinant for submerged macrophytes. Little is known about their molecular responses to low‐light exposure, despite more informative and responsive than morphological traits. For erect‐type submerged macrophytes, the stem is more crucial relative to the leaf in acclimation to low‐light stress, but receives less attention. We determined morphological and stem transcriptomic responses/acclimations ofHydrilla verticillatato extremely and mildly low light (7.2 and 36 μmol photons m−2 s−1, respectively), that is, EL and ML, with the radiation intensity of 180 μmol photons m−2 s−1as the control. Low‐light exposure continued for 9 days, followed by a 7‐day recovery phase (180 μmol photons m−2 s−1). At the exposure phase, the low‐light treatments, in particular the EL, decreased the relative growth ratio, but induced greater height and longer stem internode distance and epidermal cell. Such responses/acclimations continued into the recovery phase, despite more or less changes in the magnitude. Transcriptome showed that the photosynthetic system was inhibited at the exposure phase, but the macrophyte adjusted hormone synthesis relating to cell division and elongation. Moreover, the EL activated cell stress responses such as DNA repair. Following light recovery, the macrophyte exhibited a strong‐light response, although energy metabolism enhanced. Especially, the EL enriched the pathways relating to anthocyanin synthesis at such phase, indicating an activation of photoprotective mechanism. Our findings suggest that negative influences of low light occur at both low‐light exposure and recovery phases, but submerged macrophytes would acclimate to light environments. Transcriptome can show molecular basis of plant responses/acclimations, including but not limited to morphology. This study establishes a bridge connecting morphological and molecular responses/acclimations.
Multichannel Low‐Noise Low‐Power Amplifier for Neural Signal Acquisition
Authors: YASUDA YOHEI , NAKANO NOBUHIKO 
Published: October 2023

SUMMARYThis paper describes a low‐noise and low‐power spike neural signal amplifier design that has cut‐off frequency compensation between channels and chips. The variation of the frequency characteristics of amplifiers should be minimized among the channels and chips. This is a requirement to perform statistical correlation analysis from a neuroscience‐oriented point of view. Our design includes an adjustable cut‐off frequency using a 4‐bit variable capacitance. After compensation, the variation of the cut‐off frequency was reduced to between –0.4 kHz and +0.3 kHz from between –1.1 kHz and +3.6 kHz; that is, the value before trimming under the condition of a target cut‐off frequency of 10 kHz. We designed a multineural signal amplifier using the Rohm 0.18 m CMOS process. The designed neural amplifier has capacitive coupled differential input to reject large dc offsets generated at the electrode–tissue interface and to avoid strong common mode noise. To achieve high energy efficiency with low noise in order to observe spike signals of the order of a few tens of mV, the MOS transistors in the OTA are operated in the subthreshold region and combined with a low‐pass filter that consumes less than a hundred nW. The amplifier yielded a midband gain of 37.9 dB and the input‐referred noise was measured as 3.76 Vrms with a consumption of 4.30 W, with a 0.9 V power supply. These results correspond to a noise efficiency factor (NEF) of 2.23, close to the limit using a single differential OTA prepared by a CMOS process.