bluuebunny/crossref_metadata_2025_split huggingface dataset:
Inference of multi‐sample stage life testing model under Weibull distribution
Authors: Samanta Debashis , Kundu Debasis 
Published: August 2024

AbstractIn this article we consider the meta‐analysis of stage life testing experiments. We propose a method to combine the data obtained from number of independent stage life testing experiments. We have assumed that there are only two stress levels for each stage life testing experiment and lifetime of the experimental units follows Weibull distribution at each stress level. The distributions under two stress levels are connected through Khamis–Higgings model assumption. We assume that the shape parameters of Weibull distribution are same for all the samples; however, the scale parameters are different. We provide the maximum likelihood estimation and the asymptotic confidence intervals of the model parameters. We also provide the Bayesian inference of the model parameters. The Bayes estimates and the associated credible intervals are obtained using Gibbs sampling technique since the explicit forms of the Bayes estimates do not exist. We have performed an extensive simulation study to see the performances of the different estimators, and the analyses of two data sets for illustrative purpose. The results are quite satisfactory.
Reliability analysis for manufacturing system of drive shaft based on dynamic Bayesian network
Authors: Cheng Taotao , Fan Diqing , Liu Xintian , Wang JinGang 
Published: August 2024

AbstractAccurately analyzing the reliability of driveshaft systems is crucial in engineering vehicles and mechanical equipment. A complex system reliability modeling and analysis method based on a dynamic Bayesian network (DBN) is proposed to repair accurately and reduce the cost in time. Considering the logical structure of the drive shaft system, the reliability block diagram (RBD) of the manufacturing system is constructed in a hierarchical and graded manner, and a method of obtaining the Bayesian network (BN) directly from the RBD is adopted based on the conversion relationship between the RBD, fault tree and BN. A variable‐structure DBN model of the system is constructed based on a static BN extended in time series and incorporating dynamic reliability parameters of the components. Reliability analyses based on DBN reasoning, including reliability assessment, significance metrics, and sensitivity analyses, were performed to identify critical subsystems and critical components. This research contributes to enhancing product reliability, equipment utilization, and improving economic efficiency.
Enhanced Photocatalytic Performance of HTO/TiO2 Composites Prepared by Hydrothermal Soft Chemical Synthesis Under UV Irradiation
Authors: Du Yi‐en , Wu Guopeng , Zhou Hang , Li Zhengyang , Li Juan , Zhang Zhenwei 
Published: August 2024

AbstractWhite metatitanic acid H2TiO3 (HTO)/TiO2 composites with co‐exposed [111]‐, {010} and {101} facets were successfully synthesized by employing the white suspension of [TMA+]2[TiO3]2− as the precursor via a hydrothermal soft chemical synthesis method in the presence or absence of 1‐ethyl‐3‐methylimidazolium bromide ([Emim]Br), 4‐bromine imidazole (Bmim) and 1‐methyl‐3‐propylimidazole tetrafluoroborate ([Pmim]BF4) ionic liquids. The structure, morphology, specific surface areas, microstructure, surface properties, and charge migration behaviors of HTO/TiO2 composites vary depending on the selected ionic liquid. The apparent rate constant of the Bmim‐HTO/TiO2 composite was the highest, at 0.0353 min−1, which was approximately 1.35, 1.38, 1.44, 2.67, and 88.25 times higher than that of [Pmim]BF4‐HTO/TiO2 (0.0262 min−1), [Emim]Br‐HTO/TiO2 (0.0256 min−1), No IL‐HTO/TiO2 (0.0245 min−1), CM‐TiO2 (0.0132 min−1) and Blank samples (0.0004 min−1), respectively. Compared with CM‐TiO2 and other HTO/TiO2 samples, the Bmim‐HTO/TiO2 composite featuring cuboid anatase TiO2 nanocrystals with co‐exposed [111]‐facets and {101} facets, exhibited superior photocatalytic activity in degrading methylene blue (MB) under ultraviolet light irradiation. This exceptional performance can be attributed to its cooperative effects, including a larger specific surface area, the co‐exposure of [111]‐ and {101} facets, a suitable heterojunction structure, and the most efficient charge carrier separation. This work introduces a hydrothermal soft chemical process for preparing HTO/TiO2 composite with controllable morphology and co‐exposed reactive facets, which holds promise for practical applications in removing organic pollutants from printing and dyeing wastewater.
Development of Modified TiO2 for Photocatalytic Hydrogen Production
Authors: Li Ning , Jiang Tuohong , Qi Yihui , Zhang Dongqiang , Zhao Yu 
Published: August 2024

AbstractTiO2 has advantages such as excellent photocatalytic performance, high chemical stability, low price, and not easy to produce secondary pollution. Therefore, the photocatalytic hydrogen production over TiO2 catalyst was an effective way to achieve hydrogen production from solar energy with low energy consumption and low cost. However, the TiO2 catalyst responds only to UV light due to its wide forbidden band, and the electrons and holes were prone to recombination, resulting in the decrease in photocatalytic activity and quantum efficiency. In recent years, researchers have conducted a series of modifications on TiO2 to improve its visible light response, reduce the rate of carrier recombination, and thereby enhance the efficiency of photocatalytic hydrogen production. This paper reviews several main modification methods of TiO2 including morphology regulation, ion doping, semiconductor recombination, noble metal deposition, dye sensitization and their research progress in the field of photocatalytic hydrogen production. Finally, the modification of TiO2 photocatalyst in the future was predicted.
Deep Eutectic Solvent (DES)‐Mediated Green Approach for Synthesis of Benzothiazole Tethered Pyrazoles: Antimicrobial Properties and Molecular Docking Insights
Authors: Hussein Essam M. , Moussa Ziad , Obaid Rami J. , Abd‐El‐Aziz Ahmad , Altass Hatem M. , Elbanna Khaled , Abulreesh Hussein H. , Almalki Meshal , Banerjee Amrita , Chattopadhyay Arpita , Kumar Pal Samir , Ahmed Saleh A. 
Published: August 2024

AbstractThe escalating incidence of bacterial resistance to commonly prescribed antibiotics underscores the urgent need for the rapid development of innovative antibacterial medications. Heterocyclic compounds, particularly nitrogen‐containing heterocycles like pyrazoles and thiazoles, have garnered attention for their diverse biological activities, including antimicrobial properties. Here, we present a green and efficient multicomponent synthesis method for fourteen novel benzothiazole‐tethered pyrazole derivatives. Utilizing the deep eutectic solvent glycerol/K2CO3 as a base‐catalytic reaction medium at 70 °C, this synthesis approach yielded promising compounds exhibiting substantial antimicrobial activity against various pathogenic microorganisms such as Staphylococcus aureus, Bacillus cereus, and Candida albicans. Among these, 4‐(benzo[d]thiazol‐2‐yl)‐3‐(4‐nitrophenyl)‐1‐phenyl‐1H‐pyrazol‐5‐amine emerged as the most promising candidate, showcasing significant inhibitory potentials with CZD values of 24 mm, 21 mm, and 26 mm for S. aureus, B. cereus, and C. albicans, respectively. Molecular docking studies further supported the experimental observations, revealing the high binding affinity of the compound to the nitroreductase enzyme with a binding score of −8.5 kcal/mol. These findings underscore the potential of these synthesized compounds as antimicrobial agents and suggest avenues for future research in exploring their structure‐activity relationships and therapeutic applications in combating bacterial infections.
Introduction, Types, Properties, and Applications of Switchable Solvents: A Review
Authors: Kanawade Sandeep , Kesarwani Sonali , Bajpai Tripathy Divya , Gupta Anjali , Kumar Singh Sandeep , Chhabra Priyanka 
Published: August 2024

AbstractSwitchable solvents (SS) are a class of liquids with the unique ability to significantly alter their physical properties in response to external stimuli such as changes in temperature or the introduction or removal of CO2 gas. This reversible behaviour allows them to return to their original state with minimal changes, making them highly advantageous for various applications. A notable example of a switchable solvent is waste carbon dioxide gas, which is non‐toxic, non‐flammable, and cost‐effective. The versatility of switchable solvents extends to their polarity and physical states, which can be modified through molecular adjustments, opening new pathways for research and industrial applications. This review provides a comprehensive overview of switchable solvents, including their classification, history, properties, and applications, with a particular focus on their role in green chemistry. The types of switchable solvents discussed include Switchable‐Polarity Solvents (SPS), Switchable‐Hydrophilicity Solvents (SHS), and Switchable Water. Each type is examined in terms of synthesis, chemical properties, and development. The desirable properties of switchable solvents, such as their efficiency and recyclability, make them suitable alternatives to traditional solvents in various fields. Their applications range from water treatment and oil extraction to cleaning solid particles and recovering residual motor oil. Additionally, switchable solvents have proven effective as reaction media and in recovering polystyrene from foam. This paper also highlights the environmental benefits of switchable solvents, emphasizing their role in reducing the ecological impact of chemical processes. The potential for future developments in this field is significant, with ongoing research aimed at enhancing their performance and expanding their applications. By providing a detailed analysis of switchable solvents, this review aims to support researchers and industry professionals in developing more sustainable and efficient chemical processes.
Investigations of Functional Groups Effect on CO2 Adsorption on Pillar[5]arenes Using Density Functional Theory Calculations
Authors: Duy Ho Quoc , Rauls Eva 
Published: August 2024

AbstractThis study investigates how various functional groups affect the adsorption of carbon dioxide (CO2) in pillar[5]arenes (P[5]A) at the aim of enhancing CO2 capture in P[5]A for environmental applications. Density functional theory (DFT) and density‐functional‐based tight‐binding (DFTB) methods were employed to investigate the adsorption behavior of CO2 in pillar[5]arenes (P[5]A) with various functional groups including P[5]A with methyl (P[5]A‐OCH3), aldehyde (P[5]A‐OCOH) functional groups and pillar[5]quinone (P[5]Q). Self‐consistent charge DFTB calculations have been performed using the DFTB+ code, with dispersion corrections included for van der Waals interactions, to ensure accurate results at a lower computational cost. Bader charge analysis have been carried out with VASP code to understand the interaction mechanisms and charge transfer between P[5]A and CO2. The study demonstrates that changing the functional groups of P[5]A affects CO2 adsorption behavior. Specifically, CO2 adsorption is more favorable at the cavity site of P[5]A‐OCH3 compared to other functional groups, due to the combined effects of weak hydrogen bonds and π‐π interactions. The calculated results shows that the functionalization is one of the beneficial factors for CO2 capture in pillararenes, the adsorption energy and configuration of adsorbed CO2 at P[5]A are affected by both the polarization and geometry of the functional groups. Furthermore, the density of states (DOS) calculations confirm that CO2 is only physisorbed in P[5]A, ensuring the reusability of pillararenes after desorption. The findings of this study suggest that modifying the functional groups of pillararens is a promising strategy for developing high‐efficiency CO2 capture materials.
Synthesis, Structural, and Optical Properties of Modified Poly(vinyl Chloride) Thin Films by Ethylenediamine Loaded with Metal Oxide Nanoparticles
Authors: Abed Rasheed N. , Rashad Alaa A. , Hayawi Rahman Mokdad , Basem Ali , Al‐Ani Ahmed , Husain Amani , Jumaah Noorhan S. , Hashim Hassan , Bufaroosha Muna S. , Yousif Emad , Hadawey Abas 
Published: August 2024

AbstractPoly (vinyl chloride) (PVC) films modified with ethylenediamine (en) and doped by nanoparticles (TiO2, ZnO, NiO, and MgO). A mixture of 0.5 g PVC/en dissolved in THF and 0.01 wt % of nanoparticles were used in doping PVC to produce the nanocomposite films. All modified PVC films were characterized by different analysis techniques such as Fourier Transform Infrared (FTIR), Nuclear Magnetic Resonance Spectrometer (NMR), diffusive reflectance spectroscopy (DRS), X‐ray diffraction analysis (XRD), and scanning electron microscopy (SEM). The DRS was used to analyse the scattered IR energy of the samples at wavelengths between (250–1350 nm). The optical properties and oscillator strength were also studied, the transmittance and reflectance values declined for the PVC films, and the absorption coefficient was observed between (79–89 %). The direct energy gap decreased from 4.6 to 1.9, and the indirect energy gap reduced from 4.3 to 1.9. The XRD exhibited a semi‐crystalline structure and the SEM test exhibited a porous structure of all samples. The Urbach energy was increased from 0.8772 eV to 14.712 eV, single oscillator energy (
) was also increased from 6.38 eV to 13.69 eV and the dispersion energy
increased from 23.40 eV to 70.63 eV. Moreover, the surface roughness parameters Ra and Rq of the PVC films in modified and doping were increased from 3.86 nm to 8.14 nm, and 5.08 nm to 10.10 nm respectively. So, PVC results show increased optical properties after modification with en and doping by NPs are used in the light conversion and aerospace industries.
Recent Advancements of Hyaluronic Acid Nanoscaffolds in Arthritis Management
Authors: Jana Koushik , Ghosh Somnath , Debnath Biplab , Kumar Rout Saroj , Kumar Sarangi Manoj , Halder Jitu , Kanti Rajwar Tushar , Pradhan Deepak , Kumar Rai Vineet , Dash Priyanka , Das Chandan , Kar Biswakanth , Ghosh Goutam , Rath Goutam 
Published: August 2024

AbstractArthritis is a significant health concern affecting over 528 million people globally, reducing quality of life. The chronic nature of arthritis, coupled with insufficient therapeutic effectiveness, recurrence, and adverse side effects, complicates its management. Hyaluronic acid (HA) has emerged as a promising solution due to its biocompatibility, non‐toxicity, and targeted drug delivery capabilities, being a key component of the cartilage extracellular matrix widely used in managing arthritis. HA's inherent viscoelastic property and ability to target CD44 have spurred interest in developing HA‐based systems for delivering drugs to manage arthritis. Hyaluronic acid nanoscaffolds (HA‐NSCfs) show improved outcomes over treatments, including enhanced drug uptake through receptor‐mediated targeting, prolonged retention in the synovium, reduced proinflammatory mediator expression, enhanced cartilage regeneration, reduced drug toxicity due to sustained release, and more cost‐effective treatments. This review highlights the rationale for using HA‐NSCfs for the management and advanced drug delivery systems in arthritis, emphasizing preclinical and clinical results. It discusses various solid‐lipid nanoparticles, hydroxyapatite nanoparticles, polyelectrolyte complexes, liposomes, bilosomes, drug‐polymer conjugates, hydrogels, inorganic nanoparticles, and polymer nanoparticles, etc reported for arthritis management. Additionally, the review identifies key challenges and offers suggestions to address them, ultimately highlighting the potential of HA‐NSCfs as a topical treatment for arthritis.
Co‐Pyrolysis and Pyrolysis of Corn‐Cob Biomass and Waste Plastic: Comprehensive Study Based on Kinetic and Thermodynamic Approach
Authors: Reddy Anil Kumar , Ajay Raj A. , Baburao Upare Vishal , Amala J. , Krishna Prasad M. , Srinath Surananai , Anantharaman Anjana P. 
Published: August 2024

AbstractThis study focuses on the utilization of agro‐residual corn‐cob biomass, waste plastic and the combination of both for pyrolysis reaction using thermal analysis. Circular bioeconomy is assured by closing all the resource materials loops through co‐pyrolysis process. The conversion profiles of corn cob pyrolysis at various heating rates reveal a three‐stage decomposition process, and plastic waste exhibits single stage degradation. Due to the interaction between the blended materials, additional degradation peaks arise during the co‐pyrolysis of waste plastic (PET bottles) and biomass (corn cobs). The apparent activation energy fluctuates in the range of 120–260 kJ/mol with the conversion, according to Flynn‐Wall‐Ozawa (FWO) and Kissinger‐Akahira‐Sunose (KAS) kinetic methods. Notably, for co‐pyrolysis the apparent activation energy is lower (168 kJ/mol using FWO) than the individual biomass (179 kJ/mol using FWO) and plastic (175 kJ/mol using FWO), suggesting a positive synergistic effect during charring. The liquid crude and char product analysis from corn cob pyorlysis through FTIR and XRD confirms the application of the products in energy and chemical processes. The results obtained in this study can be utilized for co‐pyrolysis reactor analysis specifically using waste plastic bottles that are accumulating in the environment.
Synthesis of Ag−Cu−MnO Triple‐Metal Composite And Evaluation of its Antimicrobial Activity and Dye Removal Efficacy
Authors: Dhar Sanchari , Bania Trisha , Roy Arindam , Roy Saikatendu Deb , Nath Soumitra , Nath Abhijit , Das Krishna Chandra 
Published: August 2024

AbstractThe synthesis of triple metal oxide nanocomposites has revolutionized materials science due to their unique properties resulting from the interaction of multiple oxide components. This study aimed to synthesize mixed metal oxide nanocomposites using a co‐precipitation method with copper sulfate, silver nitrate, and potassium permanganate as precursor salts and sodium hydroxide as the precipitating agent. The resulting Ag−Cu−MnO triple metal composite was extensively characterized using X‐ray diffraction (XRD), scanning electron microscopy with energy‐dispersive X‐ray spectroscopy (SEM‐EDS), and Fourier transform infrared (FT‐IR). The composite exhibited effective bactericidal efficacy against various bacterial strains, including Enterobacter bugandensis, Bacillus cereus, Staphylococcus aureus, and Pseudomonas aeruginosa. Moreover, the composite demonstrated notable photocatalytic activity, degrading 87.26 % of 50 ppm Eosin Yellow within 140 minutes under sunlight irradiation, as monitored by a UV‐vis spectrophotometer. This study highlights the dual functionality of the synthesized composite as both a photocatalyst and an antibacterial agent. These findings underscore its potential for diverse applications in environmental remediation and healthcare, marking a significant advancement in materials science.
Ligand Enabled Manganese‐Catalyzed Oxidation of 1,2‐Disubstituted Cyclobutanols
Authors: Karotsina Ulada , Pilicheva Margarita , Hurski Alaksiej , Astashko Dmitry 
Published: August 2024

AbstractHere we report a protocol for the preparation of 1,4‐diketones from 1,2‐disubstituted cyclobutanols based on their ring‐opening oxidation with molecular oxygen. The reaction proceeds under manganese catalysis in the presence of 1,10‐phenanthroline ligand and leads to the target product along with minor 4‐hydroxyketone that can be oxidized with Dess‐Martin periodinane in the same reaction vessel. Substrates with alkyl and aryl substituents including those bearing functional groups were successfully engaged in the reaction.
Analysis of Channel Current Noise in Small Nanoscale Metal Oxide Semiconductor Field Effect Transistors
Authors: Jia Xiaofei , Wei Qun , Zhu Yan , Zhang Wenpeng , He Liang 
Published: August 2024

AbstractThe shrinkage of metal oxide semiconductor field effect transistor (MOSFET) to the small size of the nanoscale results in changes in their channel current noise composition. This paper determines the channel current noise composition of 90 nm MOSFET through experiments, and according to the device material and noise characteristics analysis, the channel current noise of 90 nm and below is obtained, which not only contains thermal noise and suppressed channel shot noise, but also adds suppressed gate tunneling shot noise and cross‐correlation noise. Then, Monte Carlo simulation of 10 nm MOSFET noise is further used to determine the channel current composition of small size nanoscale devices. Subsequently, based on the device structure and fundamental characteristics of channel current noise, the channel current noise model is established. Finally, this model is employed to analyze the relationship between thermal noise, suppressed shot noise, cross‐correlation noise, and channel current noise in relation to bias parameters and device characteristics. The theoretical results are basically consistent with the experimental and the simulated results, and the channel noise increases with the increase of bias voltage. This achievement holds promise for enhancing the operational efficiency, reliability, and lifetime of nanoscale small‐sized MOSFET devices.
Metal Coordination Complex Derived Fe7S8 Particles Embedded in N‐doped Carbon Framework with Regulated Porous Structure Enabling High‐Rate and Durable Sodium Storage
Authors: Wen Yi , Li Yaxuan , Wang Shuai , Huang Zhenni , Wang Yuting , Gao Jingyi , Zhang Lu , Qin Xiuqing , Ren Gaoya , Tang Tiantian , Yao Zhujun , Yang Yefeng 
Published: August 2024

AbstractIron sulfides with high theoretical capacity confront the challenges of low rate capability and severe capacity fading for sodium storage, which are mainly caused by poor electron/ion transport kinetics and drastic volume fluctuations during cycling. Herein, to mitigate these obstacles, a multi‐step synthetic tactic involving solvothermal, carbonization, and subsequent sulfurization is put forward for the construction of wire‐like structure by confining Fe7S8 particles in porous N‐doped carbon framework (denoted as Fe7S8/PNC) using zinc iron nitrilotriacetate as template. By partially substituting Fe3+ with Zn2+ in the metal coordination complex, the porous structure of coordination complex derived carbon framework can be regulated through pore structure engineering of Zn nanodroplets. The desired porous and robust core/shell structure can not only afford favorable electron/Na+ transport paths and additional active sites for Na+ storage, but also provide reinforced structural integrity of interior Fe7S8 particles by retarding the pulverization and buffering the mechanical stress against volume fluctuations. As anode for sodium‐ion batteries, the optimal Fe7S8/PNC delivers a high reversible capacity (743 mAh g−1 at 0.1 A g−1), superior rate capability (553 mAh g−1 at 10 A g−1), and long‐term cycling stability (602 mAh g−1 at 5 A g−1 with 98.5% retention after 1000 cycles).