bluuebunny/crossref_metadata_2025_split huggingface dataset:
Thermodynamic Properties of the System CH4‐CF4 in the Neighborhood of the Upper Critical Solution Temperature
Authors: Simon M. , Fannin A. A. , Knobler C. M. 
Published: August 2023

AbstractMeasurements are reported of the coexistence curve and total pressure‐composition isotherms for the liquid system CH4‐CF4 in the neighborhood of the upper critical solution temperature. Values of the difference in chemical potential between the two components, μ1 ‐ μ2, have been calculated from the vapor pressure data and it is shown that the requirements for scaling are fulfilled over a large range of composition if volume fraction is chosen as the other variable. The results are compared with analogous data for one‐component systems and values of critical exponents are reported.
Measurements of the Vapour Pressures and Critical Data of Ammonium Halides
Authors: Buback M. , Franck E. U. 
Published: August 2023

AbstractIn order to determine the vapour‐pressure curve and the critical constants of ammonium halides, a high pressure autoclave was built for operation to 2000 bars and temperatures to 900°C. The highly corrosive ammonium salts are contained in internal cells made from gold‐platinum alloy or sapphire. Different types of such internal cells can be introduced into the autoclave enabling optical, conductivity, and PVT‐measurements of the gaseous and liquid phases to be made.Measured values for the vapour‐pressure curve of NH4Cl are reported. The critical temperature and critical pressure of NH4Cl are determined to be 882 ± 15°C and 1635 ± 20 bar respectively. The value 0.5 which is obtained for the critical exponent β of NH4Cl is compared with β‐values of other substances.
Phase Diagrams for Hydrogen in Metals as Deduced from Ferroelastic Properties
Authors: Alefeld G. 
Published: August 2023

AbstractQualitative and partly quantitative arguments in favour of the interpretation that the long‐range elastic dipole‐dipole interaction is responsible for phase transitions of hydrogen in metals are presented. The measurement of the response of interstitially dissolved hydrogen to an applied external elastic field yield certain combinations of the components of the elastic dipole moment tensor. These combinations determine the interaction energies which are relevant for the phase transitions “condensations” and “ordering” of hydrogen. Experimental results of Gorsky‐Effect measurements on H in V, Nb, Ta, Pd are discussed.
Entmischungserscheinungen in Palladium‐Legierungen
Authors: Brodowsky H. 
Published: August 2023

AbstractDie Aktivitätsisothermen von Wasserstoff und von Bor in Palladium lassen sich in detaillierter Weise durch zwei Effekte deuten: 1. Durch den Anstieg der Fermi‐Energie bei der Auffüllung der Elektronenbänder des Palladiums und 2. durch eine mit der Gitterverzerrung verknüpfte Attraktionswechselwirkung der gelösten Teilchen. Im Bereich der 4d‐Bandauffüllung steigt die Fermi‐Energie nur sehr geringfügig an, die Attraktionswechselwirkung überwiegt und führt unterhalb einer kritischen Temperatur zu einer Entmischung. In beiden Systemen besitzen die Mischungslücken die Form leicht asymmetrischer Parabeln, deren Zweige der Gleichung n‐nc = ± ai(Tc‐T)β gehorchen. Dabei bedeuten: n das Atomverhältnis der koexistierenden Phasen (H/Pd oder B/Pd), T die absolute Temperatur und ai einen Faktor, der für die Systeme und in geringerem Ausmaß auch für die verschiedenen Zweige unterschiedliche Werte besitzt. Der kritische Exponent β ergibt sich zu β = 0,5 ± 0,05 für 0,01 < (Tc ‐ T)/Tc < 0,10. In den ternären Systemen Pd/Me/H kann durch die Komponente Me = Ag, Cd, In, Sn, Sb in überschaubarer Weise auf den Aktivitätsverlauf und auf die Form und die Lage der Mischungslücke des gelösten Wasserstoffs Einfluß genommen werden, wobei sowohl die Zahl der verfügbaren 4d‐Lücken als auch die Attraktionswechselwirkung in weiten Grenzen geändert werden können. Auch bei den binären Systemen Pd/Me lassen sich die Abweichungen vom idealen Mischungsverhalten der durch die beiden oben genannten Effekte deuten. So wird bei diesen Systemen auf Grund der Aktivitätsdaten im Bereich der 4d‐Bandlücken bei tiefen Temperaturen eine Entmischung erwartet, wofür es im Fall Pd/Ag bereits eine Reihe von experimentellen Hinweisen gibt (Tc ≠ 600 K). Es ist bemerkenswert, daβ die Mischungsenthalpien in diesen Systemen stark exotherm sind; die Entmischungstendenz beruht hier auf einer negativen Krümmung des Konzentrationsverlaufs der Mischungsenthalpien auf der Seite der palladiumreichen Legierungen.
Visible‐light‐mediated synthesis of 3‐arylsulfonylated thioflavones using an in situ activation strategy
Authors: Na Sangcheol , Lee Anna 
Published: August 2023

AbstractWe have developed a visible‐light‐mediated synthesis of 3‐arylsulfonylated thioflavones using an in situ‐activation strategy. The reaction proceeds through a one‐pot, three‐component pathway, without the need for sensitive or harsh reaction conditions. Organic photocatalysts were employed to generate aryl radicals more efficiently from aryl diazonium salts generated in situ. This method enables the synthesis of 3‐arylsulfonylated thioflavones from aryl amines and methylthiolated alkynones, utilizing potassium metabisulfite as an inexpensive source of sulfur dioxide. The resulting products were obtained under mild reaction conditions. This approach provides an efficient alternative pathway for synthesizing thioflavone derivatives, which are prevalent among various bioactive compounds.
Voxel‐based clustered imaging by multiparameter diffusion tensor images for predicting the grade and proliferative activity of meningioma
Authors: Takahashi Yuki , Oishi Naoya , Yamao Yukihiro , Kunieda Takeharu , Kikuchi Takayuki , Fukuyama Hidenao , Miyamoto Susumu , Arakawa Yoshiki 
Published: August 2023

AbstractIntroductionMeningiomas are the most common primary central nervous system tumors. Predicting the grade and proliferative activity of meningiomas would influence therapeutic strategies. We aimed to apply the multiple parameters from preoperative diffusion tensor images for predicting meningioma grade and proliferative activity.MethodsNineteen patients with low‐grade meningiomas and eight with high‐grade meningiomas were included. For the prediction of proliferative activity, the patients were divided into two groups: Ki‐67 monoclonal antibody labeling index (MIB‐1 LI) < 5% (lower MIB‐1 LI group; n = 18) and MIB‐1 LI ≥ 5% (higher MIB‐1 LI group; n = 9). Six features, diffusion‐weighted imaging, fractional anisotropy, mean, axial, and radial diffusivities, and raw T2 signal with no diffusion weighting, were extracted as multiple parameters from diffusion tensor imaging. The two‐level clustering approach for a self‐organizing map followed by the K‐means algorithm was applied to cluster a large number of input vectors with the six features. We also validated whether the diffusion tensor‐based clustered image (DTcI) was helpful for predicting preoperative meningioma grade or proliferative activity.ResultsThe sensitivity, specificity, accuracy, and area under the curve of receiver operating characteristic curves from the 16‐class DTcIs for differentiating high‐ and low‐grade meningiomas were 0.870, 0.901, 0.891, and 0.959, and those from the 10‐class DTcIs for differentiating higher and lower MIB‐1 LIs were 0.508, 0.770, 0.683, and 0.694, respectively. The log‐ratio values of class numbers 13, 14, 15, and 16 were significantly higher in high‐grade meningiomas than in low‐grade meningiomas (p < .001). With regard to MIB‐1 LIs, the log‐ratio values of class numbers 8, 9, and 10 were higher in meningiomas with higher MIB‐1 groups (p < .05).ConclusionThe multiple diffusion tensor imaging‐based parameters from the voxel‐based DTcIs can help differentiate between low‐ and high‐grade meningiomas and between lower and higher proliferative activities.
Meta‐analysis of peripheral mean platelet volume in patients with mental disorders: Comparisons in depression, anxiety, bipolar disorder, and schizophrenia
Authors: Chen Zhichao , Wang Jing , Carru Ciriaco , Sedda Stefania , Nivoli Alessandra Matilde , Li Zhi 
Published: August 2023

AbstractBackgroundThere is a growing interest in the role of immune and inflammatory responses in mental disorders (MDs). Mean platelet volume (MPV) is an extensively utilized hemogram parameter that reflects systemic inflammation and immune function. Our research sought to determine whether a connection exists between MPV and various types of MDs.MethodsWe searched PubMed, EMBASE, PsychINFO, and Web of Science for eligible studies from inception to 15 February 2023, supplemented by manual searching the references from relevant articles. We applied standardized mean difference (SMD) and its 95% confidence interval (CI) to estimate the differences in MPV values in patients with MDs compared to controls.ResultsWe analyzed data from 24 surveys with 4843 participants (2450 patients with MDs and 2393 healthy controls). Two‐step meta‐analyses were conducted to estimate the SMD in MPV value between individuals with and without MDs. Higher MPV values were substantially linked to MDs (i.e., depression, anxiety, bipolar disorder, and schizophrenia). Moderator and stratified analyses revealed that the aggregate effects were more robust in specific populations, such as younger patients and those who had not taken antipsychotic medication within the previous month.ConclusionsOur findings corroborate the role of inflammatory response in the pathogenesis of MDs and the pharmacological treatment of these conditions. Regarding the considerable heterogeneity among studies, the level of evidence was very low to moderate.
Cinétique de L'action de L'acide Nitreux sur les Amides II. Amides Aliphatiques
Authors: Jaz J. , Bruylants A. 
Published: August 2023

AbstractLes auteurs ont élaboré une méthode de micro‐azotométrie permettant l'étude cinétique de l'action de l'acide nitreux sur les amides. Les cinq amides étudiées sont l'acétamide (I), la propanamide (II), la butanamide (III), l'isobutanamide (IV) et l'acide succinamique (V). La réaction obéit à l'équation:.où k2. en l.m‐1 s‐1 à 25°C vaut 0°, 15 pour I, 0,34 pour II, 0,16 pour III, 0,20 pour IV, 0,29 pour V. L'énergie d'activation s'élève en moyenne à 13 Kcal.m‐1. Le mécanisme proposé comporte, comme étape déterminante, l'attaque de la fonction amide par le chlorure de nitrosyle.Dans les limites de précision habituelles, la corrélation log (k/k0) ‐ Es = ρ*σ* se trouve être vérifiée.
Facile One‐Pot Three Component Synthesis, Characterization, and Molecular Docking Simulations of Novel α‐Aminophosphonate Derivatives Based Pyrazole Moiety as Potential Antimicrobial Agent
Authors: Noser Ahmed A. , Ibrahim Seham A. , Saad‐Allah Khalil M. , Salem Maha M. , Baren Mohamed H. 
Published: August 2023

AbstractAn efficient method has been developed for the synthesis of novel α‐aminophosphonates (AAP) (3 a–m) through a one‐pot three‐component reaction of 1,3‐disubstituted‐1H‐pyrazol‐5‐amine, aromatic aldehydes, and phosphite using lithium perchlorate as catalyst. All newly synthesized compounds were characterized via different spectroscopic techniques. The synthesized compounds′ mode of action was investigated using molecular docking against the outer membrane protein A (OMPA) and exo‐1,3‐β‐glucanase, with interpreting their pharmacokinetics aspects. The results of the antimicrobial effectiveness of these compounds revealed a broad spectrum of their biocidal activity and this in‐vitro study was in line with the in‐ silico results. Additionally, it has been demonstrated that these compounds exhibited a minimum inhibitory concentration (MIC) with significant activity at low concentrations (7.5–30.0 mg/mL). Further, the radical scavenging (DPPH*) activity of the synthesized compounds fluctuated, with compounds 3 h, 3 a, and 3 f showing the highest antioxidant activity. Overall, the formulated compounds can be employed as antimicrobial and antioxidant agents in medical applications.
Non‐Hydrolysable Analogues of Cyclic and Branched Condensed Phosphates: Chemistry and Chemical Proteomics
Authors: Dürr‐Mayer Tobias , Schmidt Andrea , Wiesler Stefan , Huck Tamara , Mayer Andreas , Jessen Henning J. 
Published: August 2023

AbstractStudies into the biology of condensed phosphates almost exclusively cover linear polyphosphates. However, there is evidence for the presence of cyclic polyphosphates (metaphosphates) in organisms and for enzymatic digestion of branched phosphates (ultraphosphates) with alkaline phosphatase. Further research of non‐linear condensed phosphates in biology would profit from interactome data of such molecules, however, their stability in biological media is limited. Here we present syntheses of modified, non‐hydrolysable analogues of cyclic and branched condensed phosphates, called meta‐ and ultraphosphonates, and their application in a chemical proteomics approach using yeast cell extracts. We identify putative interactors with overlapping hits for structurally related capture compounds underlining the quality of our results. The datasets serve as starting point to study the biological relevance and functions of meta‐ and ultraphosphates. In addition, we examine the reactivity of meta‐ and ultraphosphonates with implications for their “hydrolysable” analogues: Efforts to increase the ring‐sizes of meta‐ or cyclic ultraphosphonates revealed a strong preference to form trimetaphosphate‐analogue structures by cyclization and/or ring‐contraction. Using carbodiimides for condensation, the so far inaccessible dianhydro product of ultraphosphonate, corresponding to P4O112−, was selectively obtained and then ring‐opened by different nucleophiles yielding modified cyclic ultraphosphonates.
Complexation‐Triggered Fluctuation of π‐Conjugation on an Antiaromatic Dicyanoanthracene Dianion
Authors: Imagawa Taiki , Okazawa Kazuki , Yoshizawa Kazunari , Yoshida Hiroto , Shang Rong , Yamamoto Yohsuke , Nakamoto Masaaki 
Published: August 2023

AbstractThe formation of Lewis pairs is an important chemical concept. Recently, the complexation of Lewis acidic tris(pentafluorophenyl)borane with Lewis basic moieties and subsequent reduction has emerged as a fascinating strategy for designing novel reactions and structures. The impact of the complexation and subsequent reduction of antiaromatic systems bearing Lewis base moieties has been investigated. We found how Lewis adduct formation stabilizes an antiaromatic system consisting of 9,10‐dicyanoanthracene and tris(pentafluorophenyl)borane by using synthesis, X‐ray crystallography, spectroscopic analysis, and quantum chemical calculations.
Preparation ofZIF‐8—Pebax 1657 nanocomposite membranes forn‐hexane/nitrogen separation as a representative of gasoline vapour recovery
Authors: Lorvand Shabnam , Bakhtiari Omid 
Published: August 2023

AbstractGasoline vapour emission is hazardous to both human health and the ecosystem and also results in capital loss, altogether revealing the necessity of its recovery. Some ZIF‐8–Pebax flat nanocomposite membranes were fabricated by the method of solution casting and used for gasoline vapour recovery as represented byn‐hexane vapour/nitrogen separation. Microporous ZIF‐8 nanoparticles were synthesized and characterized by Fourier transform infrared (FTIR) and Brunauer–Emmett–Teller (BET) analysis. BET results revealed specific surface area, total volume, and average pore diameter of 940.8 m2 · g−1, 0.36 cm3 · g−1, and 1.54 nm, respectively. Pure nitrogen andn‐hexane vapour/nitrogen gas mixture permeabilities were measured through the membranes. There was a decline in both permeation rate and selectivity up to 5.0 wt.% of ZIF‐8 loading and the next increment at their higher loadings to considerably more values that the pristine membrane. The maximumn‐hexane vapour permeability and selectivity at 10.0 wt.% loading of ZIF‐8 nanoparticles, the feed flow rate of 173 mL · min−1, and permeate side pressure of −200 mbar were observed as 280.1 Barrer and 106.7, respectively, revealing 60.0% and 36.9% improvements compared with those of the pristine Pebax membrane. Observed 86%–92%n‐hexane vapour recovery approves the successful application of the ZIF‐8–Pebax nanocomposite membranes forn‐hexane/nitrogen separation. The long‐term separation performance of 5.0 wt.% ZIF‐8 loaded nanocomposite membrane was improved by 76.5% compared with that of the pristine Pebax membrane.
Impact of Top Electrodes (Cu, Ag, and Al) on Resistive Switching behaviour of Cu‐rich Cu2ZnSnS4(CZTS) Ideal Kesterite
Authors: Kumar Yadav Ankit , Prakash Chandra , Pandey Akhilesh , Dixit Ambesh 
Published: August 2023

AbstractCu2ZnSnS4(CZTS) active material‐based resistive random‐access memory (RRAM) devices are investigated to understand the impact of three different Cu, Ag, and Al top electrodes. The dual resistance switching (RS) behaviour of spin coated CZTS on ITO/Glass is investigated up to 102cycles. The stability of all the devices (Cu/CZTS/ITO, Ag/CZTS/ITO, and Al/CZTS/ITO) is investigated up to 103 sec in low‐ (LRS) and high‐ (HRS) resistance states at 0.2 V read voltage. The endurance up to 102cycles with 30 msec switching width shows stable write and erase current. Weibull cumulative distribution plots suggest that Ag top electrode is relatively more stable for set and reset state with 33.61 and 25.02 shape factors, respectively. The charge carrier transportation is explained by double logarithmic plots, Schottky emission plots, and band diagrams, substantiating that at lower applied electric field intrinsic copper ions dominate in Cu/CZTS/ITO, whereas, at higher electric filed, top electrodes (Cu and Ag) dominate over intrinsic copper ions. Intrinsic Cu+in CZTS plays a decisive role in resistive switching with Al electrode. Further, the impedance spectroscopy measurements suggest that Cu+and Ag+diffusion is the main source for the resistive switching with Cu and Ag electrodes.
Compact three‐phase multilevel inverter with boosting capability for low‐power three‐phase induction motor drive
Authors: Kheyri Ramin , Narm Hossein Gholizadeh , Babaei Ebrahim 
Published: August 2023

SummaryThis paper proposes a step‐up three‐phase multilevel inverter based on switched capacitor (SC) cells. The prominent features of this inverter are the reduction of the number of components (such as switches, capacitors, and sources) and the ability to boost the voltage. Also, the self‐voltage balancing of the capacitors of this inverter is one of the other features of this inverter. The level‐shifted pulse width modulation (LS‐PWM) method has been used for switching, making the output currents' total harmonic distortion (THD) low. The article has presented the experimental results of this inverter with a three‐phase induction motor with a power of 1.1 kW as a load.
Association of hospitalization for suicide attempts in adolescent girls with subsequent hospitalization for eating disorders
Authors: Soullane Safiya , Israël Mimi , Steiger Howard , Chadi Nicholas , Low Nancy , Dewar Ron , Ayoub Aimina , Auger Nathalie 
Published: August 2023

AbstractObjectiveTo determine the association between adolescent hospitalization for suicide attempts and the subsequent risk of eating disorder hospitalization.MethodThis was a cohort study of 162,398 adolescent girls in Quebec, Canada, including 7741 with suicide attempts before 20 years of age, matched to 154,657 adolescents with no attempt between 1989 and 2019. The main exposure measure was suicide attempt hospitalization. The main outcome measure was hospitalization for an eating disorder up to 31 years later, including anorexia nervosa, bulimia nervosa, and other eating disorders. We used adjusted Cox regression models to estimate hazard ratios (HR) and 95% confidence intervals (CI) for the association between adolescent suicide attempts and eating disorder hospitalization.ResultsAdolescent girls admitted for a suicide attempt had 5.55 times the risk of eating disorder hospitalization over time (95% CI 3.74–8.23), compared with matched controls. Suicide attempt was associated with anorexia nervosa (HR 3.57, 95% CI 1.78–7.17) and bulimia nervosa and other eating disorders (HR 8.55, 95% CI 5.48–13.32). Associations were pronounced in girls with repeated suicide attempts. Girls who attempted suicide through self‐poisoning had an elevated risk of anorexia nervosa, whereas girls who used violent methods such as cutting or piercing had a greater risk of bulimia nervosa and other eating disorders. Suicide attempt was strongly associated with eating disorder hospitalization in the year following the attempt, but associations persisted throughout follow‐up.DiscussionSuicide attempt admission is associated with the long‐term risk of eating disorder hospitalization in adolescent girls.Public SignificanceThis study of adolescent girls suggests that suicide attempt admission is associated with the long‐term risk of hospitalization for eating disorders. The risk is greatest in the year after the attempt, but persists over time. Adolescents who present with a suicide attempt may benefit from screening for eating disorders and long‐term follow‐up to help prevent the exacerbation or development of eating disorders.
A study on comparing method of motion classification using muscle bulging for control of powered prosthetic hand
Authors: Iwai Hayato , Wang Feng 
Published: August 2023

AbstractAiming at the control of a powered prosthetic hand, this paper compares methods for the classification of intended hand motions using muscle bulging patterns caused by muscle contraction. Two sheets of Polyvinylidene Difluoride (PVDF) film were used as sensors to detect the muscle bulging on the forearm caused by intended hand motions. A neural network had been successfully trained for the classification of six types of hand motions using the muscle bulging pattern detected by the two PVDF sensors. In this paper, we further studied the motion classification methods of back propagation neural network (BPNN), k‐nearest neighbor algorithm (k‐NN), and support vector machine (SVM) to compare their classification performance. We found that all three methods had a similar classification rate of about 95% for six types of hand motions. Moreover, a regressive analysis comparison of the time for each classification method to converge to 95% of the total classification rate showed that SVM converged significantly earlier than BPNN and k‐NN. The time it takes for SVM to converge the classification rate to 95% is less than 0.1 s, suggesting that real‐time motion classification is possible by using SVM. In a similar manner, we found that SVM requires the least training data of the three methods at only nine trials for a type of motion. Furthermore, SVM had the highest classification rate at about 90% in practical experimental conditions. In conclusion, SVM was found to be the most practical of the three methods.
A survey on applications of the semi‐tensor product method in Boolean control networks with time delays
Authors: Mu Tiantian , Feng Jun‐e 
Published: August 2023

SummaryAs regulatory networks that simulate and establish gene interactions, Boolean networks (BNs) exhibit significant delays in state updates or trajectory tracking due to environmental factors in practical applications. This paper provides a comprehensive knowledge overview of Boolean control networks with time delays (TBCNs) via the semi‐tensor product theory (STP), which includes the history of BNs, the property of STP, several issues of TBCNs and future prospects. The related problems contain controllability and reachability, observability and detectability, stability and stabilization, synchronization, output tracking and regulation, and other issues. Finally, it also points out that some areas still need further research and promotion, such as disturbance decoupling, system decomposition, identification, deep reinforcement learning, and so forth.