bluuebunny/crossref_metadata_2025_split huggingface dataset:
Enhancement of VOCs removal using a novel double‐tube packed bed catalytic dielectric barrier discharge (DPDBD) reactor
Authors: Cao Senwu , Tang Yihong , Jiang Jingxian , Zhang Hongbo 
Published: December 2023

AbstractWe developed a novel double‐tube packed bed catalytic dielectric barrier discharge (DPDBD) reactor to degrade toluene. The DPDBD reactor contains four discharge cells with one power supply, namely, A–D. NiO/γ‐Al2O3 is packed in cell A to effectively destroy the branched chains in toluene. TiO2/γ‐Al2O3 is packed in cell B owing to its high catalytic oxidation activity to weaken the benzene rings and mineralize the generated partial aromatic compounds. Cell C is a pure DBD process without any catalyst packed to thoroughly mineralize all the generated aromatic compounds and convert CO into CO2 and NO into NO2. γ‐Al2O3 is packed in cell D to reduce the concentrations of byproducts, including O3 and NO generated by air through oxidation. The combinations of the four discharge cells are optimized by the treatment of −3000 mg m−3 of toluene at 11 kV. In comparison with a double‐tube dielectric barrier discharge (DDBD) reactor without catalyst packing and with a total discharge length of 6 cm, the selectivity of CO2 was significantly improved from 45% to 57% when the discharge lengths of A, B, C, and D are 2, 4, 4, and 2 cm, respectively. Furthermore, the concentrations of O3 and NO in the outlet can also be effectively reduced from 2.80 and 210 mg m−3 to 1.30 and 60 mg m−3, respectively. We also investigated the effects of applied voltage and styrene initial concentration.
Determination of Ground State Structures of Snx− (x=21–35) Clusters
Authors: Wang Kai , Wang Chaoyong , Guo Junji , Zhao Jun , Liu Le , Chen Jiaye , Liu Zhiqing , Wang Yarui 
Published: December 2023

AbstractIn this work, an unbiased global search with a homemade genetic algorithm was performed to investigate the structural evolution and electronic properties of Snx− (x=21–35) clusters with density functional theory (DFT) calculations. All the ground‐state structures for all these Snx− (x=21–35) clusters have been confirmed by the comparison of the experimental and simulated photoelectron spectra (PESs). It has been revealed that all Snx− (x=21–35) clusters are tricapped trigonal prism (TTP)‐based structures consisting of two (for sizes x=21–28) or three (for x=29–35) TTP units, with the remaining atoms adsorbed on the surface or inserted between TTP units. The gradually decreasing HOMO‐LUMO gaps indicate that these clusters are undergoing semiconductor‐to‐metal transformation. The average binding energies show that the structural stabilities of Snx− clusters are not as good as that of silicon and germanium clusters. It found that sizes x=23, 25, 29, 33 show high relative stability.
Computational Modelling and Mechanistic Insight into Light‐Driven CO Dissociation of Square‐Planar Rhodium(I) Complexes
Authors: Huang Tianbai , Kupfer Stephan , Geitner Robert , Gräfe Stefanie 
Published: December 2023

AbstractThe activation step of Vaska‐type Rh(I) complexes, such as the photocleavage of the Rh−CO bond, plays an important role in the subsequent C−H activation. To elucidate the details of the photochemistry of Vaska‐type Rh(I) complexes, such as trans‐Rh(PMe3)2(CO)(Cl), we here present a computationally derived picture as obtained at the density functional level of theory in combination with multireference wavefunction‐based methods. We have identified that the photocleavage of CO proceeds via the metal‐centered excited state (3MC,
), which is populated through intersystem crossing from the dipole‐allowed excited state S1(
‐
). Moreover, the present study unraveled the reasons for the low C−H activation efficiency when using Rh featuring the bidentate ligand 1,2‐bis(dimethylphosphino)ethane (dmpe), namely due to its unfavorable photochemical properties, i. e., the small driving force for light‐induced CO loss and the fast deactivation of 3MC state back to the singlet ground state. In this study, we provide theoretical insight into mechanistic details underlying the light‐induced CO dissociation process, for Rh complexes featuring PMe3 and dmpe ligands.
Structural, Electronic, and Mechanical Properties of Ag‐Cu‐Ga Intermetallic Compounds: First‐Principles Calculations
Authors: Xu Jielai , Liu Manmen , Zhou Xiaolong 
Published: December 2023

AbstractIn this paper, the mechanical properties, electronic structures, and thermodynamic properties of Ag2Ga and CuGa2 under pressure are studied using the first‐principles method based on Density functional theory (DFT). With the increase in pressure, the equilibrium lattice constants (a/a0 and c/c0) and volume ratio (V/V0) of Ag2Ga and CuGa2 continuously decrease. The elastic constants show that Ag2Ga and CuGa2 are mechanically stable under pressures of 0–20 GPa, and the increase in pressure improves their deformation resistance. The results of Young's modulus (E) show that the hardness of CuGa2 is higher than that of Ag2Ga. The results of Cauchy pressure (C12 ‐ C44) and B/G ratio show that the plasticity of Ag2Ga and CuGa2 can be maintained with the increase in pressure. By analyzing the density of states (DOS), charge density difference (CDD), and population, the influence of pressure on electronic structure is studied. The calculated Debye temperature (θD) shows that the covalent bond of CuGa2 is stronger.
Adaptability enhancement of fractional‐order LLCL‐type grid‐connected inverter to weak grid based on grid voltage weighted feedforward scheme
Authors: Wang Xiaogang , Zhuang Ruidong , Yang Ru , Hu Wei , Zou Tao 
Published: December 2023

SummaryGrid‐connected inverter with a novel fractional‐order LLCL filter has the advantage of high grid current tracking accuracy and low total harmonic distortion without passive or active dampers, and the grid voltage full feedforward scheme is an effective method to improve the quality of grid current. However, due to the digital control delay, the suppression of the grid current harmonics is weakened, and the inverter output impedance has an additional negative phase shift, which deteriorates the stability of grid‐connected systems under weak grid. In this paper, a weighted grid voltage fractional‐order feedforward control scheme is proposed based on a quasi‐proportional resonant (QPR) controller, which introduces two weighting factors in the full feedforward path of the grid voltage and compensates the phase lag of the output impedance by designing appropriate weighting factors. Then, an improved scheme combining the QPR controller with a phase compensator is presented. As a result, the suppression ability of grid current harmonics and the adaptability to grid impedance variations are enhanced. Simulation and experimental results verify the effectiveness of the proposed grid voltage fractional‐order weighted feedforward scheme.
The voltage feedforward based pulse width modulation strategy under the fluctuated dc‐link voltage for a unidirectional five‐level ac motor drive system with open‐end winding connection
Authors: Cheng Hong , Zhao Zhihao , Wang Cong , Yuan Wei , Hao Junhao , Li Xin 
Published: December 2023

SummaryIn a unidirectional five‐level ac motor drive system with open‐end winding connection, because of the variation of operating frequency of ac motor, the instantaneous power fluctuation of rectifier stage and inverter stage will generate larger voltage ripple on each phase dc‐link capacitors, and further lead to a large amount of current harmonics in output currents of inverter. To cope with this problem, an improved space vector pulse width modulation (SVPWM) strategy based on dc‐link voltage feedforward is proposed. In this paper, the effects of zero sequence current harmonics caused by dc‐link voltage ripple on ac motor are firstly analyzed, including the stator winding flux linkage equation, voltage equation, and electromagnetic torque. Then, the generating mechanism of dc‐link voltage ripple and the current harmonics are discussed in detail in terms of instantaneous power fluctuation of each single‐phase converter. Based on this, an improved SVPWM strategy by modifying the modulation signal is proposed to suppress the generation of current harmonics. Finally, a 2.2 kW prototype experimental results are given, which verify the feasibility and advancement of the proposed modulation strategy.
USP7 promotes non‐small‐cell lung cancer cell glycolysis and survival by stabilizing and activating c‐Abl
Authors: He Yuanming , Jiang Shuoyi , Zhong Yueya , Wang Xiaoge , Cui Yaoli , Liang Jingpei , Sun Yuening , Zhu Zhigang , Huang Zhenqian , Mao Xinliang 
Published: December 2023

AbstractBackgroundAbelson tyrosine kinase (c‐Abl) is frequently mutated and highly expressed, and promotes non‐small‐cell lung cancer (NSCLC) survival, metastasis and tumorigenesis. c‐Abl could also be modified through ubiquitination, but the underlying mechanism is not well understood.MethodsMass spectrometry assays were performed to search c‐Abl deubiquitination enzymes. The molecular mechanism was determined using Co‐IP assays, pull‐down assays, Western blotting upon gene knockdown or overexpression. Cell lines and animal models were used to investigate the role of c‐Abl and USP7 in NSCLC. EdU staining assay and Transwell assay were performed to evaluate the proliferation and migration ability of NSCLC cells, respectively.ResultsUbiquitin‐specific protease 7 (USP7) is found to upregulate c‐Abl via the deubiquitinase screen. USP7 interacts with c‐Abl and decreases its K48‐linked polyubiquitination, thereby increasing the stability of c‐Abl. In addition to the wild‐type one, c‐Abl mutants can also be deubiquitinated and stabilized by USP7. Moreover, USP7 promotes c‐Abl accumulation in cytoplasm by increasing its binding to 14‐3‐3α/β and activates the oncogenic c‐Abl signalling pathway. Furthermore, the USP7/c‐Abl axis promotes NSCLC cell glycolysis by direct phosphorylating and stabilizing hexokinase‐2 (HK2). Knockdown of USP7 or c‐Abl suppresses NSCLC cell glycolysis and reduces lactate production. Further studies revealed that overexpression of USP7 facilitates NSCLC cell growth and metastasis as well as xenograft growth in nude mice, while these activities are suppressed with USP7 or c‐Abl being knocked down.ConclusionsUSP7 is a deubiquitinase of c‐Abl and upregulates its oncogenic activity. USP7 promotes NSCLC cell metabolism by activating c‐Abl and HK2. Targeting the USP7/c‐Abl/HK2 axis might be a potential strategy to the precision therapy of NSCLC.
Pathologically diagnosed early‐stage gastric adenocarcinoma with enteroblastic differentiation after endoscopic submucosal dissection: A case report
Authors: Iwata Hiroki , Maeda Hidehito , Tsuneyoshi Kengo , Matsumoto Takuma , Fujita Hiroshi , Komohara Yoshihiro , Ido Akio 
Published: December 2023

AbstractA 77‐year‐old male patient underwent esophagogastroduodenoscopy at his family doctor, and an easily hemorrhagic depressed lesion was noted near the anterior wall of the gastric antrum. A biopsy revealed moderately differentiated tubular adenocarcinoma > poorly differentiated adenocarcinoma, and the patient was referred to our department for further examination. A 15‐mm 0–IIc lesion is seen near the anterior wall of the gastric antrum and narrow band imaging magnifying endoscopy revealed obscured glandular duct structures and corkscrew pattern vascular structures. We diagnosed the patient with early‐stage gastric cancer [L, Ant, 15mm, cType0‐IIc, cT1(M‐SM1), cN0, cM0, cStage IA] after an esopahogastroduodenoscopy examination at our hospital, and endoscopic submucosal dissection was performed. Histopathological images with hematoxylin and eosin staining showed tumor cells with pale cytoplasm and the immunostaining for alpha‐fetoprotein, sal‐like protein 4, and Glypican3 was positive. The patient was pathologically diagnosed with gastric adenocarcinoma with enteroblastic differentiation, pT1b1 (SM, 0.4 mm), type 0–IIc, 15 mm, UL (‐), Ly0, and V0. Gastric adenocarcinoma with enteroblastic differentiation is one of the representative histological types of alpah‐fetoprotein‐producing gastric cancer. Alpha‐fetoprotein‐producing gastric cancer is infrequent, accounting for at least 3% of all gastric cancers, and is generally highly malignant. Most cases are already advanced upon diagnosis, and finding them in the early stage is rare. Therefore, pathological findings that may indicate the gastric adenocarcinoma with enteroblastic differentiation should be noted even in early gastric cancer.
Comparing family‐based treatment with inpatient treatment in youth with anorexia nervosa eligible for hospitalization: A 12‐month feasibility study
Authors: Haas Verena , Wechsung Katja , Kaiser Vivien , Schmidt Janine , Raile Klemens , Busjahn Andreas , Le Grange Daniel , Correll Christoph U. 
Published: December 2023

AbstractObjectiveFamily‐based treatment (FBT) for youth with anorexia nervosa (AN), has not been compared to inpatient, multimodal treatment (IMT).MethodProspective, non‐randomized pilot feasibility study of adolescents with AN receiving FBT (n = 31), and as a reference point for exploratory outcome comparisons IMT (n = 31), matched for baseline age and percent median BMI (%mBMI). Feasibility of FBT in youth fulfilling criteria for IMT was assessed via study recruitment and retention rates; acceptability via drop‐out and caregiver strain; safety via adverse events; preliminary treatment effectiveness between groups was assessed via a change in %mBMI, AN psychopathology (Eating Disorder Examination‐Questionnaire, EDE‐Q), and hospital days, over 12 months with intent‐to‐treat, mixed models repeated measures analyses covering post‐intervention usual care until 12 months.ResultsTaking into account that 8 FBT patients (25.8%) crossed over to IMT due to lack of weight gain or psychiatric concerns, FBT and IMT were similarly feasible, acceptable, and safe, apart from more physical antagonism toward others in FBT (p = .010). FBT lasted longer (median [interquartile range, IQR]; 33.6 [17.4, 49.9] vs. 17.3 [14.4, 24] weeks, p < .001), but required fewer hospital days than IMT (median, [IQR], FBT = 1 [0, 16] vs. IMT = 123 [101, 180], p < .001). Baseline comorbidity‐adjusted changes over 12 months did not differ between groups in %mBMI (FBT = 12.6 ± 11.9 vs. IMT = 13.7 ± 9.1; p = .702) and EDE‐Q global score (median, [IQR]; FBT = −1.2 [−2.3, 0.2] vs. IMT = −1.3 [−2.8, −0.4]; p = .733).DiscussionImplementing FBT in this pilot study was feasible, acceptable, and safe for youth eligible for IMT according to German S3 guidelines. Non‐inferiority of FBT versus IMT requires confirmation in a sufficiently large multicenter RCT.Public SignificanceThis pilot study with 62 adolescent patients with anorexia nervosa demonstrated that for 2/3rd of patients eligible for a long hospitalization in the German health care system, outpatient, Family‐based treatment (FBT) was a safe and feasible treatment alternative. Over 12 months, FBT lead to similar weight gain and reduction in eating disorder cognitions as inpatient treatment with fewer hospital days. This pilot study needs to be followed up by a larger, multicenter trial.
Partial and asymmetrical reproductive isolation between two sympatric tropical shrub species: Cnidoscolus aconitifolius and C. souzae (Euphorbiaceae)
Authors: Munguía‐Rosas Miguel A. , Parra‐Tabla Víctor , Rodríguez‐Domínguez José M. 
Published: December 2023

AbstractReproductive isolation is conferred by several barriers that occur at different stages of reproduction. Comprehensive reviews on the topic have identified that barriers occurring prior to zygote formation are often stronger than those that occur afterward. However, the overrepresentation of temperate perennial herbs in the current literature precludes any generalization of this pattern to plants that present other life forms and patterns of distribution. Here, we assessed reproductive isolation barriers and their absolute contribution to reproductive isolation and asymmetry in Cnidoscolus aconitifolius and C. souzae, two closely related tropical shrub species that co‐occur on the Yucatan peninsula. The reproductive barriers assessed were phenological mismatch, pollinator differentiation, pollen–pistil incompatibility (three pre‐zygotic barriers), fruit set failure, and seed unviability (post‐zygotic barriers). Reproductive isolation between the study species was found to be complete in the direction C. aconitifolius to C. souzae, but only partial in the opposite direction. One post‐zygotic barrier was the strongest example. Most barriers, particularly the pre‐zygotic examples, were asymmetrical and predicted the direction of heterospecific pollen flow and hybrid formation from C. souzae to C. aconitifolius. Both parental species, as well as the hybrids, were diploid and had a chromosome number 2n = 36. More studies with tropical woody perennials are required to fully determine whether this group of plants consistently shows stronger post‐zygotic barriers.
A pilot study of S100A4, S100A8/A9, and S100A12 in dilated cardiomyopathy: novel biomarkers for diagnosis or prognosis?
Authors: Yu Ying , Shi Hui , Wang Yucheng , Yu Yong , Chen Ruizhen 
Published: December 2023

AbstractAimsCirculating biomarkers can provide important information for the diagnosis and prognosis of dilated cardiomyopathy (DCM). We explored novel biomarkers for the diagnosis and prognosis of DCM to improve clinical decision‐making.Methods and resultsA total of 238 DCM patients and 65 control were consecutively enrolled at Zhongshan Hospital between January 2017 and January 2019. In the screening set, four DCM patients and four controls underwent measurements of serum proteomic analysis. Seventy‐six differentially expressed circulating proteins were screened by data‐independent acquisition proteomics, and three of these proteins (S100A4, S100A8/A9, and S100A12) were validated by multiple‐reaction monitoring‐mass spectrometry. In the validation set, subsequently, a total of 234 DCM patients and 61 control subjects were evaluated by enzyme‐linked immunosorbent assay. Circulating S100A4, S100A8/A9, and S100A12 were significantly increased in DCM patients (P < 0.001). These three proteins were significant positively correlated with other parameters, such as Lg (NT‐proBNP), IL‐1β, TGF‐β, CRP, left ventricular end‐diastolic diameter, and left ventricular end‐systolic diameter, whereas they were negatively correlated with left ventricular ejection fraction, respectively (P < 0.05). The receiver operator characteristic curve showed the combination of S100A4, S100A8/A9, and S100A12 [area under curve (AUC) 0.88, 95% confidence interval (CI) 0.84–0.93] was better than single S100A4 (AUC 0.74, 95% CI 0.68–0.81), S100A8/A9 (AUC 0.82, 95% CI 0.77–0.88), or S100A12 (AUC 0.80, 95% CI 0.72–0.88) in the diagnosis of DCM (P < 0.01). After a median follow‐up period of 33.5 months, 110 patients (47.01%) experienced major adverse cardiac events (MACEs), including 46 who had cardiac deaths and 64 who had heart failure rehospitalizations. Kaplan–Meier analysis indicated that the DCM patients with ≥75th percentile level of S100A4 had a significantly higher incidence of MACEs than those with <75th percentile level of S100A4 (61.40% vs. 42.37%, P < 0.05). There were no significant differences of MACE rate among DCM patients with different concentrations of S100A8/A9 and S100A12 (P > 0.05). Cox proportional hazards regression analysis revealed that S100A4 [≥75th percentile vs. <75th percentile: hazard ratio (HR) 1.65; 95% CI 1.11–2.45] remained significant independent predictors for MACEs (P < 0.05); however, S100A8/A9 and S100A12 were not independent factors for predicting MACE (P ≥ 0.05).ConclusionsS100A4, S100A8/A9, and S100A12 may be additional diagnostic tools for human DCM recognition, and the combination of these three indicators helped to improve the accuracy of a single index to diagnose DCM. Additionally, S100A4 was identified as a significant predictor of prognosis in patients with DCM.
Successive β‐Glycosylations of Tiacumicinone: Formal Total Synthesis of Tiacumicin B and Access to a d‐Mannoside Analog
Authors: Messé Estelle , Labrunie Antoine , Servajean Vincent , Rubéru Caroline , Jeanne‐Julien Louis , Gallard Jean‐François , Steinmetz Vincent , Roulland Emmanuel , Norsikian Stéphanie 
Published: December 2023

AbstractA formal total synthesis of the natural macrolide antibiotic tiacumicin B is described featuring successive and selective glycosylations of tiacumicinone. The challenging β‐facial selectivity of these key glycosylation steps was achieved by using noviosyl or rhamnosyl donors equipped with a phenyl sulfoxide leaving group and a 3‐O‐picoloyl group ensuring an efficient remote stereodirecting effect. Compared with our former total synthesis, this strategy enables us to save steps and gain access to new analogs. This was demonstrated by the replacement of the rhamnosidic moiety by a d‐mannose derivative.
Total least squares bias in climate fingerprinting regressions with heterogeneous noise variances and correlated explanatory variables
Authors: McKitrick Ross 
Published: December 2023

AbstractRegression‐based “fingerprinting” methods in climate science employ total least squares (TLS) or orthogonal regression to remedy attenuation bias arising from measurement error due to reliance on climate model‐generated explanatory variables. Proving the consistency of multivariate TLS requires assuming noise variances are equal across all variables in the model. This assumption has been challenged empirically in the climate context but little is known about TLS biases when the assumption is violated. Monte Carlo analysis is used herein to examine coefficient biases when the noise variances are not equal. The analysis allows the explanatory variables to be negatively correlated which is typical in climate applications. Ordinary least squares (OLS) exhibits the expected attenuation bias which vanishes as the noise variances on the explanatory variables disappear. In some cases, TLS corrects attenuation bias but more typically imparts large and generally positive biases. OLS performs well when the true value of whereas TLS performs quite poorly. This implies that TLS is not well suited for tests of the null. When TLS tends to exhibit opposite biases to OLS. Diagnostic information specific to each data sample should be consulted before using TLS to avoid spurious inferences and replacing OLS attenuation bias with other, potentially larger biases.
More trust or more risk? User acceptance of artificial intelligence virtual assistant
Authors: Xiong Yiwei , Shi Yan , Pu Quanlin , Liu Na 
Published: December 2023

AbstractArtificial intelligence (AI) virtual assistants are rapidly growing, permeating people's daily lives and work. However, some trust and risk issues prevent the acceptance and use of AI virtual assistants by users. Thus, understanding the roles of trust and perceived risk in user acceptance of AI virtual assistants is crucial. This study develops a comprehensive research model based on unified theory of acceptance and use of technology (UTAUT) to explain user acceptance of AI virtual assistants. This model extends UTAUT by adding users' perception of trust and risk. The research model and hypotheses are validated through structural equation modeling with a sample of 926 AI virtual assistant users. Results show that gender is significantly related to behavioral intention to use, education is positively related to trust and behavioral intention to use, and usage experience is positively related to attitude toward using. UTAUT variables, including performance expectancy, effort expectancy, social influence, and facilitating conditions, are positively related to behavioral intention to use AI virtual assistant. Trust and perceived risk respectively have positive and negative effects on attitude toward using and behavioral intention to use AI virtual assistants. Trust and perceived risk play equally important roles in explaining user acceptance of AI virtual assistants. Theoretical and practical implications of the current AI virtual assistant acceptance model and directions for future research are discussed.