bluuebunny/crossref_metadata_2025_split huggingface dataset:
Performance of novel engineered materials from nano‐silica incorporated phenol‐formaldehyde‐flax fabric hybrid composite: Thermal, wear, aging and biodegradability analysis
Authors: Lakshmipriya Ravindran , Unnikrishnan T. G. , Soney C. George , Sreekala M. S. , Sabu Thomas 
Published: August 2024

AbstractWith the growing awareness of environmental issues, natural fiber composites have emerged as a viable substitute for conventional polymer composites. The usage of natural fiber reinforced with nano fillers composites has increased significantly in recent years, especially in the building, automotive, and aerospace industries. This research explores the effect of nano‐silica in tribological, thermal behavior, water diffusion properties and biodegradation of flax fabric/phenol‐formaldehyde hybrid composites. We have fabricated the hybrid composites utilizing compression molding technique. The results showed that after reaching the lowest value for 4 nanosilica (NS), the volumetric wear rose when the addition of nano‐silica was increased. However, the volumetric wear decreased as the weight percentage of nano‐silica improved. At lower sliding speeds (1 m/s), the VW value is between 0.06782 and 0.05455 cm3, but at higher sliding speeds (3 m/s), it is roughly 0.09253–0.06187 cm3. The thermal stability was improved for 1 NS, 2 NS, and 3 NS is 1.20%, 1.64%, and 0.71%, respectively. At three different temperatures (30, 60, and 90°C) the impact of nano‐silica on the water diffusion behavior of PF‐flax fabric hybrid composites was examined. 2 NS showed the least amount of water sorption. it was noted that the three coefficients—Diffusion, Sorption, and Permeation‐were all declining when compared to PF‐flax fabric composites devoid of nano‐silica following computing the Arrhenius values, the free energy change was always negative, indicating the spontaneity of sorption in non‐reinforced samples. The tensile strength of every composite in this investigation was marginally changed by the water aging process.
Characteristics and competitive mechanisms of polycondensation and cyclization induced by end‐groups in polyamide 6 melt
Authors: Chen Kefan , Wang Yongjun , Zhou Liangliang , Dai Junming , Chen Wenxing , Lu Wangyang 
Published: August 2024

AbstractPolycondensation and ring‐formation reactions are the main factors that cause instability in the molecular structure of commercial polyamide 6 (PA6) during melting. In this study, the mechanisms and interactions of the ring‐formation and polycondensation reactions induced by various factors were thoroughly investigated. The findings suggest that the average molecular weight of PA6 increased by 20.4% during melting. The total monomer and oligomer content increased by 79.2%, and the ring‐forming reaction was promoted with an increase in temperature. Moreover, a high concentration of the end‐amino in PA6 promoted the ring‐forming reaction, whereas similar concentrations of the end‐amino and end‐carboxyl groups were more conducive to the polycondensation reaction. In short, the nitrogen atoms in the end‐amino group on the PA6 molecular chain attack the carbonyl carbon at different sites, including the carbonyl carbon in the amide bond and the carbonyl carbon in the end‐carboxyl group, which is the key to the strength of the ring‐formation and polycondensation reactions.
Discovery of anisiflupurin, an inhibitor of cytokinin dehydrogenase that mitigates heat‐induced yield reduction in rice
Authors: Leipner Jörg , Ruta Nathinee 
Published: August 2024

AbstractBACKGROUNDIn a screening of anilinopurine, anisiflupurin was identified as potent inhibitor of cytokinin dehydrogenase/oxidase (CKX). Inhibitors of CKX have been supposed to be potent plant growth regulators to alleviate the detrimental effects of abiotic stress on crop production. The aim of the study was to profile anisiflupurin in a set of physiological assays and to evaluate its potential for heat stress mitigation in rice field trials.RESULTSAnisiflupurin delayed dark‐induced senescence and increased transpiration in detached maize leaves in a dose‐dependent manner. Similarly, the transpiration of young rice plants under heat stress was increased for several days after application with anisiflupurin. Application of anisiflupurin during early phases of generative growth not only restored heat‐induced pollen alterations it increased grain yield in field grown rice under heat conditions as demonstrated in a large field program conducted in southeast Asia. Thereby, efficacy of anisiflupurin was rate‐dependent and most effective when applied during early generative growth phases prior heat stress.CONCLUSIONSApplication of anisiflupurin secures seed setting by protecting pollen development and enhances grain weight under heat stress conditions in rice. The results of this research opens up a promising avenue for mitigating the adverse effects of heat stress in rice cultivation. © 2024 Society of Chemical Industry.
Discovering new mode‐of‐action pesticide leads inhibiting protein–protein interactions: example targeting plant O‐acetylserine sulfhydrylase
Authors: Ben‐Shushan Rotem Shelly , Cohen Elad , Ben‐Naim Noam , Amram Eytan , Gressel Jonathan , Peleg Dotan , Dotan Nesly , Bloch Itai , Gal Maayan 
Published: August 2024

AbstractBACKGROUNDThe widespread evolution of pesticide resistance poses a significant challenge to current agriculture, necessitating the discovery of molecules with new modes of action. Despite extensive efforts, no major molecules with new modes of action have been commercialized for decades. Most pesticides function by binding to specific pockets on target enzymes, enabling a single target site mutation to confer resistance. An alternative approach is the disruption of protein–protein interactions (PPI), which require complementary mutations on both interacting partners for resistance to occur. Thus, our aim is the discovery and design of small‐molecule inhibitors that target the interface of the PPI complex of O‐acetylserine sulfhydrylase (OASS) and serine acetyltransferase (SAT), key obligatory interacting plant enzymes involved in the biosynthesis of the amino acid cysteine.RESULTSBy employing in silico filtering techniques on a virtual library of 30 million small molecules, we identified initial hits capable of binding OASS and interfering with its interaction with a peptide derived from SAT with a half‐maximal inhibitory concentration (IC50) of 34 μm. Subsequently, we conducted molecular chemical optimizations, generating an early lead molecule (PJ4) with an IC50 value of 4 μm. PJ4 successfully inhibited the germination of Arabidopsis thaliana seedlings and inhibited clover growth in a pre‐emergence application at an effective concentration of 4.6 kg ha−1.CONCLUSIONThese new compounds described herein can serve as promising leads for further optimization as herbicides with a new mode‐of‐action. This technology can be used for discovering new modes of action chemicals inhibiting all pest groups. © 2024 The Author(s). Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
Jellyfish‐inspired multimodular bionic amphibious robot
Authors: Ma Pan , Qu Haibo , Liu Wenju , Wang Xiaolei , Wang Haoqian , Hu Buqin , Guo Sheng 
Published: August 2024

AbstractTo make the amphibious robot have a lot of functions while keeping the overall structure relatively simple, this paper proposes a multimodule bionic amphibious robot (MMBAR) inspired by the movement mode of jellyfish. The MMBAR consists of four modules, which are connected by snaps, and can be assembled quickly. The wing–leg structure suitable for swimming in the water is designed, which combines the legs and wings using a flexible hinge. Meanwhile, the integrated design principle is adopted to combine the wing–leg structure with the wheel structure to design a deformable wheel suitable for land movement. The overall structure of the MMBAR is simple, and the wing–legs can be deformed to perform a variety of functions, such as acting as a wheel for land movement, as a claw for grasping objects, and as a propulsion mechanism to power the MMBAR for swimming. Theoretical modeling and simulation analyses are conducted separately for the MMBAR on land and in water, which helps understand the movement characteristics of the MMBAR and to obtain more optimized movement parameters. In addition, we conducted experiments on the MMBAR, such as climbing slopes, climbing steps, walking on snow, swimming in water, grasping objects, and so forth, which confirm that the MMBAR possesses a strong ability to adapt to the environment. These research results add new content to the research of amphibious robots, which are expected to replace humans to fulfill more dangerous jobs.
Key technology of temporary support robot for rapid excavation of coal mine roadway
Authors: Zhang Heng , Ma Hongwei , Mao Qinghua , Xue Xusheng , Wang Chuanwei 
Published: August 2024

AbstractThe coal industry has long been troubled by the imbalance between mining and tunneling, and between excavating and support. The main cause of this problem is the inability to perform excavating and permanent support operations in parallel. Additionally, the limited space near the tunneling face hampers the efficiency of permanent support. Temporary support is an effective method to ensure the stability of the surrounding rock and expand the space for parallel operations between excavating and permanent support activities. This work provides a brief overview of the current research status on temporary support, emphasizing that the key to achieving safe, efficient, and rapid excavation lies in the development of temporary support robots. To meet the development needs of temporary support robots, three key technologies are proposed: the construction of a coupling model between the robot and the surrounding rock, spatial layout optimization of the rapid advancement system, and adaptive control of the robot. This work details the methods and approaches for constructing the coupling model, the elements of system spatial layout optimization, and the methods and strategies for the robot's adaptive control. Our team successfully tested the shield robot system at Xiaobaodang Mining Company, verifying the feasibility of these key technologies.
How effective are trade policy and monetary policy in achieving a pathway to sustainable development? Evidence from a wavelet quantile‐on‐quantile Granger causality analysis
Authors: Adebayo Tomiwa Sunday , Olanrewaju Victoria Olushola 
Published: August 2024

AbstractThe paper explores the impact of trade policy (TRP) and monetary policy (MP) on CO2 emissions in the United States over the period February 1, 1988–December 12, 2022. The study employed wavelet quantile‐on‐quantile regression (WQQR) to explore the relationship across different quantiles and time‐scales. Furthermore, the present study introduced wavelet quantile‐on‐quantile Granger causality (WQQGC) to explore the predictive power of the independent variable over the dependent variable with a focus on different time‐scales and quantiles. The use of wavelet quantile‐based tools is supported by the nonlinear and non‐normal distribution of the variables. The results from WQQR show that in the short and medium term, an increase in renewable energy consumption (REC) in the United States is accompanied by an increase in CO2 emissions. However, in the long term, across all quantiles, REC effectively reduces CO2. In the short and medium term, the negative impact of TRP on CO2 emissions is apparent; however, we observed a supportive positive effect of TRP on reducing CO2 emissions in the long term. Across all periods, the influence of MP on CO2 emissions is generally weak yet positive; however, there are instances of negative associations. Across all quantiles in the short term, the impact of natural gas on CO2 emissions remains positive, although this positive effect diminishes in the long term. Finally, all the regressors can significantly predict CO2 emissions at dissimilar quantiles and time‐scales. The study formulates Sustainable Development Goals policies based on the above findings.
Eccrine Angiomatous Hamartoma Treated with Multimodal Vascular Laser and Incobotulinum
Authors: Gu Yaron , Truong Kelvin , Kossard Steven , Lim Adrian , Sebaratnam Deshan F. 
Published: August 2024

Abstract
Eccrine angiomatous hamartoma (EAH) is a rare benign vascular lesion that is distinguished histologically by vascular and eccrine overgrowth. We report the case of a 46-year-old woman with EAH who was successfully treated with multimodal incobotulinum toxin A, pulsed dye laser and long-pulsed neodymium-doped yttrium aluminium garnet laser.
KOtBu Assisted Regio‐ and Stereo‐Selective Alkoxy‐Isomerization of Ortho‐Alkynyl Allylic Alcohols: Synthesis of Alkylidene Dihydroisobenzofurans and Indenones
Authors: Biswas Dwaipayan , Kishore Dakoju Ravi , Naveen Jakkula , Satyanarayana Gedu 
Published: August 2024

AbstractA transition metal‐free synthesis of alkylidene dihydroisobenzofurans from the ortho‐alkynyl allylic alcohols is reported herein. Notably, a simple base tBuOK is utilized for the 5‐exo‐dig cyclization and double bond isomerization of ortho‐alkynyl allylic alcohols to furnish alkylidene dihydrobenzofurans with Z‐stereoselectivity under shorter reaction times. In addition, the geometry of the double bonds was confirmed by 1D Selective Gradient NOESY and 2D NMR (NOESY) analysis. Furthermore, the effectuality of the ortho‐alkynyl allylic alcohols has been shown by extending to the one‐pot synthesis of indanones via aqueous acid‐mediated hydrolysis (ring‐opening) of in‐situ formed dihydroisobenzofurans followed by intramolecular condensation reaction under acidic conditions
Fabrication of Ag2MoO4/CuWO4 Nanocomposite Photocatalyst for the Degradation of Rhodamine‐B
Authors: Jatav Neha , Kumar Uttam , Shrivastava Anshu , Singh Nivedita , Sinha Indrajit 
Published: August 2024

AbstractHerein, we investigate the photocatalytic properties of a new Ag2MoO4/CuWO4 composite. Three different composites with 5, 10, and 15 weight percent of fine Ag2MoO4 nanostructures were precipitated on CuWO4 nanoparticles. Given the staggered valence and conduction band positions of the two components, the composite with the 10 % weight percent Ag2MoO4 loading on CuWO4 demonstrated the slowest recombination kinetics. The same composite also exhibited the best photocatalytic degradation of RhB under UV light irradiation. The photocatalytic turnover frequency of this composite was also among the best reported for RhB degradation reported in the literature. Photocatalytic kinetics, active species trapping, and various control experiments were carried out to get an insight into the photocatalytic mechanism. The optimum photocatalyst exhibited its highest activity at pH 3 and a RhB degradation turnover frequency (photocatalytic activity) comparable to the best values reported in the literature.
Greener Synthesis of Copper Oxide Nano‐Particles Using Rivina Humilis L. Plant Extract, Characterization and Their Biological Evaluation for Anti‐Microbial and Anti‐Oxidant Activity
Authors: Sheikh Sartaj , Mungole Arvind J. , Pandhurnekar Chandrashekhar P. , Kanfade Harsha P. , Pandhurnekar Himani C. , Pawar Abhimanyu P. 
Published: August 2024

AbstractSynthesis of nano‐particles using various greener approaches such as the use of plant extract, microbes, etc. is gaining a lot of popularity in the scientific community due to their advantages of being a cheaper protocol, reduction in the use of less hazardous chemicals, more environmentally benign method and good yield. It has been previously reported by many research groups that plant material provides reducing, capping as well as stabilizing agents and brings down biological and environmental risks in the green synthesis of nano‐particles. So it was thought worthwhile to synthesize copper oxide nano‐particles (CuO NPs) using some locally available medicinal plants. Rivina humilis L. plants which are available in our region of Vidarbha in Maharashtra State, India are considered to be the herbal plant for the treatment of respiratory‐related disorders mainly for asthma and cold by local tribal peoples. It has been found that it contains a variety of phytochemicals which can be employed for the synthesis of nanomaterials. With this aim it was thought worthwhile to present an efficient and greener approach for the synthesis of copper oxide nano‐particles using Rivina humilis L. (RH) whole plant extract. For characterization of bio‐synthesized CuO NPs, various spectral and analytical techniques such as UV‐Vis spectroscopy, FT‐IR, XRD, SEM, TEM, and EDS were employed. The newly synthesized CuO NPs were also tested for their potential biological activities against six different bacterial stains namely E. coli, P. aeruginosa, S. aureus, P. vulgaris, B. subtilis, and S. typhi using the well diffusion method. The antioxidant efficacy of the synthesized CuO NPs was undertaken through 1,1‐Diphenyl‐2‐picrylhydrazyl (DPPH) free radical scavenging activity. Their results have been presented and discussed in the present work.
Fabrication of an In‐situ Synthesized Porous Silica‐Ruthenium‐Nickel Composite Catalyst for Hydrolysis of Ammonia Borane
Authors: Umegaki Tetsuo , Uchida Takanobu , Imai Haruhiro , Xu Qiang , Kojima Yoshiyuki 
Published: August 2024

AbstractThis work investigated in‐situ synthesis of porous silica‐nickel‐ruthenium composite catalysts for hydrolysis of ammonia borane. The precursors were prepared with an anionic surfactant, sodium dodecyl sulfate (SDS), to form porous structure in the precursor particles, and the precursors was treated in aqueous solution including sodium borohydride and ammonia borane for in‐situ process to parallelly activate and use the catalysts for hydrolysis of ammonia borane. The result of TEM and nitrogen sorption measurements suggested that the primary particle size of the in‐situ synthesized catalysts decrease with increasing the amount of SDS and sodium chloride as the additive for controlling the primary particle size probably because of the effect of sodium ions to inhibit nuclei growth of the primary particles. From the EDS analyses, the composition of active nickel and ruthenium contents increased with increasing the amount of SDS and sodium chloride except for the highest amount of SDS probably because of adsorption of the metal cations with the excess amount of the surfactant anion to decrease the amount of the metal cations including the catalyst. The in‐situ synthesized catalyst including small size primary particles and high nickel and ruthenium content tended to exhibit high activity for hydrolysis of ammonia borane.
Metal‐Ion and UVC Light‐Catalyzed Oxidation and Biodetoxification of Ponceau Xylidine in Aqueous Solution: A Comparative Study
Authors: Marbaniang Morten , Kumar John Elisa , Mulai Tsungom , Kharmawphlang Wanshanlang , Sharan Rajeswar N. , Sahoo Mihir Kumar 
Published: August 2024

AbstractMetal ion (
/oxidant) and UV light catalyzed (UV/oxidant) mineralization and biodetoxification of Ponceau Xylidine (PX) was undertaken in this study. Hydrogen peroxide (HP) and ammonium persulphate (APS) were employed as oxidants and
and
as metal ion catalysts. Although highest mineralization in
/APS and UV/HP systems was exhibited at pH 1 (63.09 %) and 3 (64.83 %), respectively, lowest was shown by
/oxidant systems at any pH. The Fenton process achieved mineralization of ≈48.50 % within the pH range of 3 to 6.15. The study established
as a better catalyst than
, and HP, a better oxidant (2.5 times more effective) than APS. Mineralization with UV/HP at 120 min is highest at pH 3 (92.0 %) and 6.15 (86.17 %). Various inorganic anions were found to inhibit mineralization. The maximum and minimum inhibition was shown by
in UV/HP and UV/APS systems respectively. The inhibition effect of
decreases with concentration till 0.01 mM, beyond which an increasing trend was observed. This study also demonstrates that the biodetoxification efficiency of various systems is in the order: UV/HP>UV/APS>
/HP. Thus, UV/HP is the most suitable system for the treatment of PX, displaying a biodetoxification efficiency of 83.0 % and mineralization of 92.0 %.
Crystallization Kinetics and Melting Behavior of Novel Biobased Poly(butylene 2,5‐thiophenedicarboxylate)
Authors: Chen Changlin , Pan Siyu , Qiu Zhaobin 
Published: August 2024

AbstractPoly(butylene 2,5‐thiophenedicarboxylate) (PBTh) is a novel biobased semicrystalline polyester with superior thermal, mechanical, and gas barrier properties; however, the crystallization kinetics and melting behavior of PBTh have not been studied in detail so far. The crystallization kinetics of PBTh was first studied in this research. The Ozawa equation failed to describe the nonisothermal melt crystallization kinetics of PBTh due to the secondary crystallization. The crystallization activation energy value was calculated by the Friedman method, which was negative and exhibited the conversion dependence. The isothermal melt crystallization kinetics of PBTh was well described by the Avrami equation in a wide range of crystallization temperature from 84 to 120 °C. PBTh showed the fastest crystallization rate at 104 °C; moreover, the Avrami exponent value slightly varied between 2.2 and 2.7, suggesting the same crystallization mechanism within the investigated temperature range. PBTh displayed one or two melting endotherms depending on crystallization temperature, which was well explained by the melting, recrystallization, and remelting mechanism. In addition, the equilibrium melting point of PBTh was estimated to be 163.1 °C with the Hoffmann−Weeks equation.
Acid Mediated In‐Situ Catalytic Cleavage/Making of C=N Bonds in Bis‐Hydrazone Uranyl Complexes: Exploration of Photophysical, Electrochemical, Dye Sorption Properties and DFT Studies
Authors: Devi Sarau , Nayak Sampurna , Richard Bartholomew , Ravindran Reena , Salaria Punam , Chatterjee Aditi , Arivazhagan C. , Garai. Abhijit , Reddy M Amarendar , Kim Sung Yeol , Konavarapu Satyanarayana K. 
Published: August 2024

AbstractTwo new uranium complexes [UO2L2(H2O)] (where L2=diacetyl bis‐isonicotinoyl hydrazone) complex 1, and [UO2(L1)2] (where L1=diacetylmonoxime isonicotinoylhydrazone) complex 2, have been synthesized by precisely adjusting the pH values of the reaction system. Complex 1 was formed in an acidic ethanolic solution (pH=3) through an in‐situ acid catalytic reaction of diacetylmonoxime isonicotinoylhydrazone and UO2(NO3)2.6H2O, while complex 2 was acquired in a neutral medium (pH=7) through self‐assembly of two ligands and one uranium (VI) metal centre. Both complexes were thoroughly characterized by elemental analysis, UV‐Visible spectroscopy, IR spectroscopy, NMR, TGA, cyclic voltammetry, and powder X‐ray diffraction. The studies indicate that the bis‐hydrazone in complex 1 is a dianionic tetradentate N2O2 donor, whereas in complex 2 it is a monoanionic tridendate N2O donor. The formation of complex 1 was further confirmed by a single‐crystal X‐ray diffraction study, which revealed the role of a water molecule in forming a pentagonal bipyramidal geometry of [UO2L2(H2O)]. Photophysical studies revealed that complexes 1 and 2 exhibited low band gap values of 2.07 and 2.12 eV, respectively, indicating their semiconducting nature. From the CV measurements, the higher negative potentials of the complexes 1 & 2 {1, −0.6 V and 2, −0.5 V vs. ferrocenium/ferrocene (Fc+/Fc)} in DMSO are assigned to the presence of {UO2}2+/{UO2}+ couple signifying their redox active nature. Dye adsorption studies show that both the complexes were able to remove 90 % of Methylene blue (MB) and Rhodamine B (RhB) from the solutions with the concentration of 10−5 M. The structural insights and electronic properties of Ligand HL1 and complex 1 were further explored by density functional theory (DFT) calculations.