mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
Composition analysis and antimicrobial activity of essential oil from leaves of Laurus nobilis grown in Oman

Traditionally,Laurus nobilis is used for the treatment of earaches and skin rashes as well as rheumatism.The most common technique to isolate the oil is hydro-distillation and steam-distillation.The investigation presented in this paper was aimed to unravel the antimicrobial activity and chemical composition of essential oil in the leaves of L.nobilis grown in Oman.The essential oil was extracted from the leave of the selected plant species by hydro distillation using Clevenger type apparatus.The antimicrobial assay was done by disc diffusion methods against three bacterial strains,Staphylococcus aureus,Pseudomonas aeruginosa and Escherichia coli,and one fungal strain:Candida albicans.The isolated essential oil was analyzed by gas chromatography-mass spectrometry (GC-MS).The percentage yield of the essential oil was 0.064% (w/w).The essential oil was found actively against the applied bacterial and fungal strains.The highest activity was found against S.aureus and the lowest was against E.coli,and the order was S.aureus >P.aeruginosa >E.coli.The essential oil was also active against the fungus C.albicans.The range of inhibition zones was 6-14 mm.The results of GC-MS analysis showed (E)- β-caryophyllene to be the major component about 59.62%.Other major components included α-selinene (14.03%),α-humulene (8.65%),β-selinene (4.99%),and α-pinene (4.98%).In addition,several minor components were found in the essential oil of L.nobilis.Based on the experimental results,it showed that the plant species that grown in Oman were a potential source of therapeutic agents.In conclusion,the essential oil and the plant could be used as natural and potential therapeutic agents to treat earaches,skin rashes,and rheumatism.
Lead-free Nb-based dielectric film capacitors for energy storage applications

Dielectric capacitors are the ideal energy storage devices because they have excellent power density,high working voltages,and a long lifespan.With its lower size and better energy storage density,film capacitors make them simpler to incorporate into circuits than traditional dielectric capacitor devices.Lead-free Nb-based perovskite ferroelectric/antiferroelectric films have strong orbital hybridization with O 2p orbitals due to unfilled d orbitals of Nb elements,forming a series of energy storage film materials with potential application value.Here,we provide an overview of the state-of-the-art lead-free Nb-based films for energy storage applications,which include K_(0.5)Na_(0.5)NbO_3-based,K_(0.5)Na_(0.5)Bi_4NbTi_3O_(15)-based,AgNbO_3 -based and NaNbO_3 -based films.An overview of the benefits and drawbacks of each kind of Nb-based perovskite ferroelectric/antiferroelectric films is provided,along with a description of the design tactics used to achieve high energy storage performances.
Two-dimensional In_2Se_3: A rising advanced material for ferroelectric data storage

Ferroelectric memory is a promising candidate for next-generation nonvolatile memory owing to its outstanding performance such as low power consumption, fast speed, and high endurance. However, the ferroelectricity of conventional ferroelectric materials will be eliminated by the depolarization field when the size drops to the nanometer scale. As a result, the miniaturization of ferroelectric devices was hindered, which makes ferroelectric memory unable to keep up with the development of integrated-circuit (IC) miniaturization. Recently, a two-dimensional (2D) In_2Se_3 was reported to maintain stable ferroelectricity at the ultrathin scale, which is expected to break through the bottleneck of miniaturization. Soon, devices based on 2D In_2Se_3, including the ferroelectric field-effect transistor, ferroelectric channel transistor, synaptic ferroelectric semiconductor junction, and ferroelectric memristor were demonstrated. However, a comprehensive understanding of the structures and the ferroelectric-switching mechanism of 2D In_2Se_3 is still lacking. Here, the atomic structures of different phases, the dynamic mechanism of ferroelectric switching, and the performance/functions of the latest devices of 2D In_2Se_3 are reviewed. Furthermore, the correlations among the structures, the properties, and the device performance are analyzed. Finally, several crucial problems or challenges and possible research directions are put forward. We hope that this review paper can provide timely knowledge and help for the research community to develop 2D In_2Se_3 based ferroelectric memory and computing technology for practical industrial applications.
Multi-objective Dynamic Reconfiguration for Urban Distribution Network Considering Multi-level Switching Modes

The increasing integration of photovoltaic generators (PVGs) and the uneven economic development in different regions may cause the unbalanced spatial-temporal distribution of load demands in an urban distribution network (UDN). This may lead to undesired consequences, including PVG curtailment, load shedding, and equipment inefficiency, etc. Global dynamic reconfiguration provides a promising method to solve those challenges. However, the power flow transfer capabilities for different kinds of switches are diverse, and the willingness of distribution system operators (DSOs) to select them is also different. In this paper, we formulate a multi-objective dynamic reconfiguration optimization model suitable for multi-level switching modes to minimize the operation cost, load imbalance, and the PVG curtailment. The multi-level switching includes feeder-level switching, transformer-level switching, and substation-level switching. A novel load balancing index is devised to quantify the global load balancing degree at different levels. Then, a stochastic programming model based on selected scenarios is established to address the uncertainties of PVGs and loads. Afterward, the fuzzy c-means (FCMs) clustering is applied to divide the time periods of reconfiguration. Furthermore, the modified binary particle swarm optimization (BPSO) and Cplex solver are combined to solve the proposed mixed-integer second-order cone programming (MISOCP) model. Numerical results based on the 148-node and 297-node systems are obtained to validate the effectiveness of the proposed method.
Low-carbon Operation of Combined Heat and Power Integrated Plants Based on Solar-assisted Carbon Capture

Accelerating the development of renewable energy and reducing CO_2 emissions have become a general consensus and concerted action of all countries in the world. The electric power industry, especially thermal power industry, is the main source for fossil energy consumption and CO_2 emissions. Since solvent-based post-combustion carbon capture technology would bring massive extra energy consumption, the application of solar-assisted carbon capture technology has attracted extensive attention. Due to the important role of coal-fired combined heat and power plants for serving residential and industrial heating districts, in this paper, the low-carbon operation benefits of combined heat and power integrated plants based on solar- assisted carbon capture (CHPIP-SACC) are fully evaluated in heat and power integrated energy system with a high proportion of wind power. Based on the selected integration scheme, a linear operation model of CHPIP-SACC is developed considering energy flow characteristics and thermal coupling interaction of its internal modules. From the perspective of system-level operation optimization, the day-ahead economic dispatch problem based on a mix-integer linear programming model is presented to evaluate the low-carbon benefits of CHPIP-SACC during annual operation simulation. The numerical simulations on a modified IEEE 39-bus system demonstrate the effectiveness of CHPIP-SACC for reducing CO_2 emissions as well as increasing the downward flexibility. The impact of different solar field areas and unit prices of coal on the low-carbon operation benefits of CHPIP-SACC is studied in the section of sensitivity analysis.
The Arithmetic Version of the Frequency Transition Conjecture: New Proof and Generalization

The arithmetic version of the frequency transition conjecture for the almost Mathieu operators was recently proved by Jitomirskaya and Liu [34]. We give a new proof via reducibility theory and duality, which derives from the method developed in [22] (in fact it is a simplified version). This new proof is applicable to more general quasiperiodic operators.
Spontaneous uterine perforation of pyometra leads to acute abdominal pain and septic shock: a case report

Uterine pyometra is a rare disease that mostly affects elderly women and is usually asymptomatic. Pyometra is defined as an accumulation of pus in the uterine cavity caused by genital tract malignancy or benign cervical diseases such as senile cervicitis, cervical polyps, or remaining intrauterine devices after menopause. The incidence of spontaneous uterine perforation due to pyometra is extremely low, ranging from 0.01% to 0.05%. Although it has low morbidity, it can progress to diffuse peritonitis, and the mortality rate associated with septic shock is as high as 25%-40%. It is still difficult for emergency doctors to provide an accurate diagnosis and perform surgery on time. Here, we present a rare case of a 72-year-old woman who was diagnosed with spontaneous uterine perforation of pyometra and successfully treated with an emergency laparotomy.
Packing, compressibility, and crushability of rockfill materials with polydisperse particle size distributions and implications for dam engineering

In rockfill dam engineering, particle breakage of rockfill materials is one of the major factors resulting in dam settlement. In this study, onedimensional compression tests on a series of coarse granular materials with artificially-graded particle size distributions(PSDs)were carried out. The tests focused on understanding the role of initial PSDs in the dense packing density, compressibility and crushability of coarse granular materials. The effects of fractal dimension(D)and size polydispersity(θ)of PSDs were quantitatively analyzed. Two different loading stages were identified from the logarithms of the stress-strain relationships, with the turning point marked as the yield stress. A similar effect of initial PSDs was observed on the packing density and low-pressure modulus of coarse granular materials. The packing density and low-pressure modulus increased monotonically with θ, and their peak values were attained at a D value of approximately 2.2. However, there was no unique correspondence between the dense packing density and low-pressure modulus. The particle breakage was influenced differently by the initial PSDs, and it decreased with the values of D and θ. The emergence of the unique ultimate state was also identified from both the compression curves and PSDs of the samples after the tests. The potential implications of the test results in the design of both low and high rockfill dams were also demonstrated.
Status of Serum Uric Acid and Hyperuricemia among Adults in China: China Nutrition and Health Surveillance (2015)

Objective The purpose of this study was to determine the serum uric acid levels and the prevalence of hyperuricemia among Chinese adults in 2015 and compare the differences between urban and rural areas, as well as the differences between eastern, central, and western regions. Methods A national representative sample of 180,208 participants were included using a stratified, multistage, and random sampling method. The demographic characteristics and blood samples were collected to determine the serum uric acid levels and prevalence of hyperuricemia among subgroups using complicated sampling weight. A t-test or ANOVA was used for normally-distributed data. The Kruskal-Wallis rank test was used for skewed-distributed data. The Mantel-Haenszel chi-square test was used to compare the difference in categorical variables. Results The weighted mean uric acid level in Chinese adults was 310.4 μmol/L (317.5 μmol/L in urban areas and 302.9 μmol/L in rural areas). The weighted average values of uric acid in eastern, central, and western China were 315.5 μmol/L, 303.5 μmol/L, and 310.4 μmol/L, respectively. The weighted prevalence of hyperuricemia in Chinese adults was 14.6%, with a prevalence of 16.5% in urban areas and 12.5% in rural areas. The weighted prevalence of hyperuricemia in eastern, central, and western China was 16.0%, 12.5%, and 14.8%, respectively. Conclusion The uric acid level in Chinese adults is relatively high. Effective actions are warranted to improve this metabolic abnormality.
Differential mRNA Expressions in HCMV infected HUVECs

Objective The aim was to identify the gene expressions of human cytomegalovirus (HCMV)-infected human umbilical vein endothelial cells (HUVECs) and to study its possible pathogenic mechanism on atherosclerosis using microarray technology. Methods The gene expression differences in HCMV AD169 strain-infected HUVECs were studied by the microarray technology to explore the potential molecular mechanism of HCMV infection. The qPCRs were performed to verify the transcriptome results. Results A total of 2,583 differentially expressed genes, including 407 down-regulated genes and 2,176 up-regulated genes, were detected by the systematic bioinformatics analysis. The Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analyses showed that the significantly differentially expressed genes were mainly involved in regulating protein kinase activity, inflammatory response, ubiquitination, protein phosphorylation, cell metabolism, and exosomes, among which 12 genes had significant changes and were screened by protein-protein interaction (PPI) analysis and verified by qPCR. The experimental qPCR results were consistent with the microarray results. Conclusion The GO and KEGG analyses revealed that the regulation of protein kinase activity, inflammatory response, ubiquitination, protein phosphorylation, and cell metabolism played important roles in the process of endothelial cell infection. Furthermore, 12 genes were involved in the process of HCMV infection of endothelial cells and contributed to the current understanding of the infection and pathogenic mechanisms of atherosclerosis.
空天动力复合材料技术未来如何发展?

聚焦空天动力复合材料,共同探讨如何推动复合材料先进结构设计的发展和实现更高水平、更高成熟度的空天动力领域复合材料应用,这是2022年8月在辽宁大连召开的"空天动力复合材料及应用专业委员会2022年度学术会议"包括中国科学院、工程院院士在内的近200名专家学者研讨的主题。
康复领域步态研究的进展与展望

步态是指人或动物通过肢体一系列运动,使身体沿着一定方向移动时的姿态和行为特征。正常步态通常具有稳定性、周期性、节律性、方向性、协调性等特征,也具有个体差异性和周期间变异性等特征。步态影响因素很多,既包括神经、运动等多系统的耦合协同作用,也与行为习惯以及外部环境相关。
A comparison of MLT wind between meteor radar chain data and SDWACCM results

A meteor radar chain located along the 120°E meridian in the Northern Hemisphere from low to middle latitudes provides longterm horizontal wind observations of the mesosphere and lower thermosphere (MLT) region. In this study, we report a seasonal variation and its latitudinal feature in the horizontal mean wind in the MLT region observed by six meteor radar instruments located at Mohe (53.5° N, 122.3°E), Beijing (40.3°N, 116.2°E), Mengcheng (33.4°N, 116.5°E), Wuhan (30.6°N, 114.4°E), Kunming (25.6°N, 108.3°E), and Fuke (19.5°N, 109.1°E) stations. In addition, we compare the wind in the MLT region measured by the meteor radar stations with those simulated by the Whole Atmosphere Community Climate Model (WACCM). In general, the WACCM appears to capture well the seasonal and latitudinal variations in the zonal wind component. In particular, the temporal evolution of the eastward zonal wind maximum shifts from July to May as the latitude decreases. However, the simulated WACCM meridional wind exhibits differences from the meteor radar observations.
Carbonized waste milk powders as cathodes for stable lithium-sulfur batteries with ultra-large capacity and high initial coulombic efficiency

To explore the natural resources as sustainable precursors offers a family of green materials. The use of bio-waste precursors especially the remaining from food processing is a scalable, highly abundant, and cost-effective strategy. Exploring waste materials is highly important especially for new materials discovery in emerging energy storage technologies such as lithium sulfur batteries(LSBs). Herein, waste milk powder is carbonized and constructed as the sulfur host with the hollow micro-/mesoporous framework, and the resulting carbonized milk powder and sulfur(CMP/S) composites are employed as cathodes for LSBs. It is revealed that the hollow micro-/mesoporous CMP/S framework can not only accommodate the volume expansion but also endow smooth pathways for the fast diffusion of electrons and Li-ions, leading to both high capacity and long cycling stability. The CMP/S composite electrode with 56 wt% loaded sulfur exhibits a remarkable initial capacity of 1596 mAh g~(-1) at 0.1 C, corresponding to 95% of the theoretical capacity. Even at a rate of 1 C, it maintains a high capacity of 730 mAh g~(-1) with a capacity retention of 72.6% after 500 cycles, demonstrating a very low capacity fading of only 0.05% per cycle. Importantly, the Coulombic efficiency is always higher than 96% during all the cycles. The only used source material is expired waste milk powders in our proposal. We believe that this "trash to treasure" approach will open up a new way for the utilization of waste material as environmentally safe and high performance electrodes for advanced LSBs.
Green fabrication of nickel-iron layered double hydroxides nanosheets efficient for the enhanced capacitive performance

Rational synthesis of robust layered double hydroxides(LDHs) nanosheets for high-energy supercapacitors is full of challenges. Herein, we reported an ultrasonication-assisted strategy to eco-friendly fabricate NiFe-LDHs nanosheets for the enhanced capacitive behavior. The experimental results combined with different advanced characterization tools document that the utilization of ultrasonication has a profound effect on the morphology and thickness of the as-obtained NiFe-LDHs, alternatively affecting the capacitive behavior. It shows that NiFe-LDHs nanosheets prepared with 2-h ultrasonic treatments display the exceptional capacitive performance because of the synergetic effect of ultrathin thickness, large specific surface area, and high mesoporous volume. The maximum specific capacitance of Ni_3Fe1-LDHs nanosheets with the thickness of 7.39 nm and the specific surface area of 77.16 m~2 g~(-1) reached 1923 F g~(-1), which is competitive with most previously reported values. In addition, the maximum specific energy of the assembled NiFe-LDHs//AC asymmetric supercapacitor achieved 49.13 Wh kg~(-1) at 400 W kg~(-1). This work provides a green technology to fabricate LDHs nanosheets, and offers deep insights for understanding the relationship between the morphology/structure and capacitive behavior of LDHs nanosheets, which is helpful for achieving high-performance LDHs-based electrode materials.
Scaled-up synthesis of defect-rich layered double hydroxide monolayers without organic species for efficient oxygen evolution reaction

The scaled-up synthesis of organic-free monolayer nanomaterials is highly desirable, especially in obtaining green energy by electrocatalysis. In this study, a method for the scaled-up synthesis of the series of monolayer layered double hydroxides(LDHs) without the addition of organic solvents is reported via the separate nucleation and aging steps process. The resulting monolayer LDHs with the thicknesses of less than 1 nm showed a narrow thickness distribution. X-ray absorption fine-structure revealed that monolayer NiFe-LDH nanosheets have a number of oxygen and metal vacancies defects. As a practical application, monolayer NiFe-LDH nanosheets containing defects showed an enhanced electrocatalytic water oxidation activity compared with that of bulk NiFe-LDH. Density functional theory calculations uncovered that excellent catalytic activity is attributed to vacancies defects. The proposed method is an economical and universally applicable strategy for the scaled-up production of monolayer LDHs.
High performance of TiO_2/Cu_xO photoelectrodes for regenerative solar energy storage in a vanadium photoelectrochemical cell

Photocatalysts for harvesting solar energy to either electricity or chemical fuels have attracted much attention recently, but they have big obstacles such as wide bandgaps and rapid charge recombinations to overcome for final applications. In this study, we investigates a useful method to utilize vanadium redox pairs, which are commonly applied for vanadium redox flow batteries, to diminish charge recombinations and thus to enhance photocurrent response in regenerative solar energy storage. The results reveal significant improvements in photocurrent density by forming cuprous and cupric oxides in TiO_2/Cu_xO electrodes under solar AM 1.5 illuminations using the vanadium photoelectrochemical storage cell at 0.025 mol L~(-1) of vanadium redox species in the acid electrolytes. In addition, the stabilized photocurrent density of the copper content optimized TiO_2/Cu_xO electrodes is almost tripled from the TiO_2 only electrode because the charge recombinations can be mitigated with the content optimized TiO_2/Cu_xO electrodes. Therefore, the optimized TiO_2/Cu_xO electrode results in the highest charge storing performance in the catholyte chamber, and the roles of vanadium redox species are also clearly demonstrated.
Improved methanol synthesis performance of Cu/ZnO/Al_2O_3 catalyst by controlling its precursor structure

Methanol, a versatile chemical, fuel additive and potential H_2 carrier, has attracted great attention. Despite of the wide industrialization, improvement of Cu-based methanol-synthesis catalysts is highly anticipated. Accordingly, a series of Cu/ZnO/Al_2O_3 with designed precursor structures were prepared, and its structure-function relationship was investigated to make progress on this area. Results showed the catalyst derived from highly zinc-substituted malachite demonstrated the best catalytic performance in this work. It was found that the well-behaved catalyst possessed relatively high Cu specific surface area and exposed Cu concentration, and the well Cu/ZnO synergy. CuZn alloy was found by In-situ XRD tests, and its effect on the catalyst's thermostability was discussed. Fractional precipitation, which facilitated the Cu~(2+) substitution by Zn~(2+) in malachite lattice, could be an efficient preparation method of the Cu/ZnO/Al_2O_3 catalyst.