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1960 articles for “4” (ranking capped at the first 2,000 matches — narrow the search to see the rest)
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The thermodynamic studies of 6-(4-chlorophenyl)-1, 2, 3, 4-tetrahydro-2,4-dioxopyrimidine-5-carbonitrile in 60% DMSO in the temperature range 298 to 313 K
Abstract: Densities and viscosities of 6-(4-chlorophenyl)-1, 2, 3, 4-tetrahydro-2,4-dioxopyrimidine-5-carbonitrile have been measured at different concentration in 60% dimethyl sulphoxide (DMSO) in the temperature range 298 to 313 K. The John-Dole equation was used to determine the viscosity. Gibb’s free energy (∆G), entropy change (∆S) and enthalpy change (∆H) were evaluated from relative viscosity . The negative sign of ∆G and ∆H and positive sign of ∆S indicates the spontaneity of reaction …
Published in Journal of Polymer & Composites · Vol. 8, Issue 2, 2020 · pp. 78–81 Read article
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Organophilicization of Bentonite by HDTMA+ and TMPA+ Cations for Sorption of 2,4-Dichlorophenol (2,4-DCP) in Aqueous Solution
Abstract: Bentonite (Bt) was converted to organoclays by intercalation of cationic surfactants into its interlayer space. Two types of organoclays were synthesized from HDTMA and TMPA at 100% CEC, and the adsorbents were characterized by FTIR, XRD and SEM. The adsorption capacities of Bt and the organoclays for the removal of 2,4-dichlorophrnol (2,4-DCP) from aqueous solutions were tested under different conditions. Two adsorption isotherm models (Langmuir and Freundlich isotherms) were used …
Published in Journal of Catalyst & Catalysis · Vol. 7, Issue 3, 2020 · pp. 22–32 Read article
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Corrosion Inhibition Effect of 1-(4-Methoxy-phenyl)-3-(5-phenyl-1,3,4-oxadiazol-2-yl) propan-1-one Inhibitor for Mild Steel in 1 M HCl Solution
Abstract: The environmental friendly 1-(4-Methoxy-phenyl)-3-(5-phenyl-1,3,4-oxadiazol-2-yl) propan-1-one (A1) inhibitor is synthesized and their corrosion inhibition for Mild Steel in a 1 M HCl solution was studied using weight loss methods, electrochemical measurements, and the surface morphology of mild steel with and without inhibitor were studied using scanning electron microscopy (SEM) analysis. As the concentration of the inhibitor was increased the inhibition efficacy of 1-(4-Methoxy-phenyl)-3-(5-phenyl-1, 3, 4-oxadiazol-2-yl) propan-1-one was also enhanced and on …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 8, Issue 2, 2021 · pp. 31–37 Read article
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5-Methyl-2-phenyl-2,4-dihydro-3H-pyrazol-4-one: Synthesis and Reactions
Abstract: The presence of the five-member pyrazole nucleus in different structures leads to a large diversity in its applications. In almost every research study, the pyrazole derivatives biological importance faces a competitive challenge in areas of technology, medicine and agriculture. This reflects the description of these derivatives as antibacterial, antifungal, anticancer, antidepressant, anti-inflammatory, anti-tuberculosis, antioxidant as well as antiviral agents. In our review, we will discuss and show the highlights of …
Published in Journal of Modern Chemistry & Chemical Technology · Vol. 16, Issue 3, 2025 · pp. 76–87 Read article
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Influence of Carbonyl Iron Particle Loading on the Dimensional and Rheological Properties of 4D-Printed TPU-Based Magnetorheological Elastomers
Abstract: The advancement of 4D printing technologies has created new opportunities for fabricating smart materials with tunable properties, including magnetorheological elastomers (MREs). This study investigates the fabrication and characterization of thermoplastic polyurethane (TPU)-based MREs with varying carbonyl iron particle (CIP) loadings (10–50 wt.%) using the fused filament fabrication (FFF) method. MRE filaments were produced through a solvent-assisted mixing and extrusion process, ensuring consistent diameters within 1.75 ± 0.10 mm. Test specimens …
Published in Journal of Polymer & Composites · Vol. 13, Issue 6, 2025 · pp. 127–138 Read article
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Current Developments In 4D Printing Technology
Abstract: The perception of four-dimensional (4D) printing expertise was prompted through the time dimension inclusion in three-dimensional (3D) printing. Many other industries, including engineering, health, and the arts, have revealed a great deal of attention it. Recently, innovations in bioscience have been established that can be implemented using 4D printing. The ability to integrate time with situational variations has many benefits, but perceptibility and adaptability are merely two. Smart material, stimulus, …
Published in Journal of Polymer & Composites · Vol. 13, Issue 3, 2025 · pp. 108–120 Read article
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Green Synthesis of Biologically Active 2, 4, 5- Trisubstituted Imidazoles Catalyzed by Large Pore Zeolite H-BEA through Lophine MCRs
Abstract: 2, 4, 5-triphenyl-1(H)-imidazoles (popularly known as Lophine derivatives) are well known heterocyclic compounds and find significant diversified applications, not only in the area of medicinal chemistry as biologically active drug-like molecules, but also in the other advanced research areas, such as fluorescence labelling, biological imaging and chromospheres for non-linear optic system. In the present endeavour, a green synthesis of Lophine derivatives via multi-component reaction is carried out using benzil/benzoin, substituted …
Published in Journal of Catalyst & Catalysis · Vol. 4, Issue 3, 2017 · pp. 20–36 Read article
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Industry 4.0 in Various Sectors: Review and Future Scope
Abstract: Current requirement of manufacturing industries is the digital, innovative, intelligent manufacturing process. Create customized merchandise is an extraordinary open door for manufacturing industries to fortify their leading position. This requires a high level of flexibility across the entire value-added framework. The enormous digitalization of production economically empowers this versatility. Therefore, here is the need for Industry 4.0 revolution to speed up the dominant machine manufacturing to digital manufacturing. The phrase …
Published in Journal of Production Research & Management · Vol. 10, Issue 3, 2020 · pp. 5–26 Read article
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Digital Manufacturing Practices using 3D Printing in Indian Manufacturing Sector to Improve Productivity in Alignment with Industry 4.0
Abstract: Advancement in information technologies and intelligent production systems are being encouraged by the latest industrial revolution, known as Industry 4.0. In this new movement, additive manufacturing, or AM, is seen as a necessary component. A thorough analysis of AM technologies and their contributions to Industry 4.0 are provided in this publication. The three primary areas of AM that are the subject of this review are process development, design consideration improvements, …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 10, Issue 3, 2023 · pp. 38–47 Read article
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An Experimental Study to Determine Optimum Machining Conditions for Electrical Discharge Machining of the Heat Treatable Steel 42CrMo4 (Din 1.7225)
Abstract: Electric discharge machining (EDM) is a well-established machining option and a non-traditional machining process, in many manufacturing-related industries worldwide. It is found to be capable of machining geometrically complex or hard material components, which are specific and difficult-to-machine. In this study, the electrical discharge machining of 42CrMo4 with different electrode materials namely, copper, aluminum and tungsten carbide and process parameters was performed to explore the influence of EDM parameters on …
Published in Journal of Mechatronics and Automation · Vol. 2, Issue 2, 2015 · pp. 23–32 Read article
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Performance Analysis of Single Band PIFA for 4G/LTE Mobile Communication Networks
Abstract: This paper presents a Planer Inverted F Antenna (PIFA) for Fourth Generation (4G) Long Term Evaluation (LTE). The proposed antenna is designed on FR4 substrate and the dimension is 22.5 mm x 18.5 mm x 2.8 mm. The Antenna covers the LTE 40 frequency band application from 2.3–2.4 GHz (resonance at 2.35 GHz). Different performance parameters: return loss, VSWR, radiation pattern, current distribution, gain and efficiency are analyzed. The proposed …
Published in Journal of Microwave Engineering and Technologies · Vol. 3, Issue 3, 2016 · pp. 1–7 Read article
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Overlapped Multipass Laser Transformation Hardening of Ti-6Al-4V Titanium Alloy Using Continuous Wave Rectangular Beam
Abstract: Overlapped multitrack laser transformation hardening (OMLTH) of Ti-6Al-4V titanium alloy of Grade 5 of 2 mm thickness sheet has been carried out using 2 kW Nd:YAG laser source with a CW rectangular beam of size 1×14 mm2. The present research article intended to provide a profound understanding of the multipass laser hardening process of TI-6Al-4V titanium alloy, and to investigate the effect of rectangular laser beam process parameters i.e., the …
Published in Journal of Materials & Metallurgical Engineering · Vol. 7, Issue 3, 2017 · pp. 35–42 Read article
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A quad band PIFA for 4G / 5G wireless communication applications
Abstract: AbstractA compact PIFA for wireless RF (Radio Frequency) devices is presented. The proposed antenna covers GPS L1, GSM 1800, GSM 1900, UMTS 2100, LTE 1700/2100 MHz, LTE 2300, Bluetooth/Wi-Fi/IEEE 802.11 b/g/n, RFID, IEEE 802.16e mobile WiMAX, UNII and C-band frequency bands useful for both 4G and 5G wireless communication applications. The simulation results for return loss, VSWR, two-dimensional radiation patterns and current distribution are demonstrated. The parametric analysis of feed …
Published in Journal of Communication Engineering & Systems · Vol. 9, Issue 2, 2019 · pp. 7–15 Read article
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Industry 4.0 and Smart Manufacturing: A Review
Abstract: This review looks at Industry 4.0 and smart manufacturing's idea, enabling technologies, implementation issues, and future prospects. Drawing on recent literature, the paper synthesizes key pillars such as the Industrial Internet of Things (IIoT), cyber-physical systems (CPS), artificial intelligence, digital twins, and additive manufacturing. It highlights integration requirements across supply chains, cyber security concerns, workforce implications, and standards activities that influence adoption. The literature survey focuses on empirical studies and …
Published in International Journal of Manufacturing and Production Engineering · Vol. 3, Issue 2, 2025 · pp. 14–17 Read article
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A Computational Study of Lift and Drag Characteristics for NACA 4415 and NACA 2412 Aerofoils
Abstract: The performance of an aerofoil is crucial in designing wind turbine blades, aircraft wings, and other aerodynamic surfaces. This project presents a comparative analysis of two widely used aerofoil profiles, NACA 4415 and NACA 2412, to study their lift and drag characteristics under different flow regimes. The aerofoil geometries were developed using the NACA four-digit notation and modeled in ANSYS Design Modeler. Numerical simulations were conducted in ANSYS Fluent for …
Published in Journal of Polymer & Composites · Vol. 14, Issue 2, 2026 · pp. 1298–1315 Read article
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Analysis of Modulation Response of a 450 nm True Blue Semiconductor Laser by Varying Differential Gain
Abstract: AbstractIn this work the analysis of modulation response of a 450 nm InGaN based multi-quantum well (MQW) true blue semiconductor laser have been presented. The internal designing of 450 nm blue laser has been done before. but the desired wavelength of 450 nm was obtained by adjusting the exact concentration of In0.211Ga0.789N/Al0.07Ga0.93N in this work. The effects on modulation response by varying the differential gain have been observed. Also, the …
Published in Trends in Opto-electro & Optical Communication · Vol. 5, Issue 1, 2015 · pp. 1–8 Read article
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Analysis and Application of Cognitive Radio on 4G Communications
Abstract: AbstractNowadays network services are available anywhere and anytime through the advancement in wireless communication technology. Several technology and generation are introduced for wireless communication such as 2.5G, 3G etc. But for faster and reliable communication wireless generations are improved—4G technology is one of them. 4G communication systems are being developed to solve the various problems faced by the current communication systems (3G, 2.5G). 4G will be an intelligent technology that …
Published in Journal of Communication Engineering & Systems · Vol. 4, Issue 3, 2014 · pp. 1–8 Read article
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Promising Antimicrobial Compounds from an Endophytic Fungus Penicillium daleae EF 4 Isolated from the Seaweed Enteromorpha flexuosa Linn.
Abstract: AbstractThe present aim of the study is to isolate the endophytic fungi from various seaweeds and to screen their bioactivity, to analyze the β-lactamase inactivator and to evaluate the interactions between the crude extract of Endophytic fungi Penicillium daleae EF 4 and two antibiotics (penicillin G and tetracycline), against some antibiotic resistant bacterial strains. Seaweeds collected from various places of Bay of Bengal coast was subjected to Endophytic fungal isolation. …
Published in Research and Reviews: A Journal of Microbiology and Virology · Vol. 9, Issue 1, 2019 · pp. 26–39 Read article
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Economical Speed Characteristics in a 4 Stroke SI Engine using CNG, Petrol Blend
Abstract: Increasing need of energy and its effective utilization, reduced fuel consumption and increasing output power has become major aspect in engine development and research. As non-renewable fuels are depleting day by day, there is a necessity of using alternative fuels. CNG is one of the alternate fuels. Idea of this work is to blend gaseous fuel with liquid fuel and find the performance. We implemented this in bike (4 stroke …
Published in Journal of Automobile Engineering and Applications · Vol. 7, Issue 1, 2020 · pp. 12–17 Read article
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Evaluation of Industry 4.0 Adoption Obstacles Through the Use of SMEs
Abstract: Industry 4.0 offers significant technology advancements, but businesses must overcome several obstacles before implementing it. Although a lot of work has gone into identifying the hurdles that most businesses face, the literature currently in publication has not taken the time to examine how these barriers relate to one another or what that means for practitioners. Within the framework of Portugal's manufacturing sector, we employ the interpretative structural modelling (ISM) technique …
Published in Journal of Production Research & Management · Vol. 13, Issue 3, 2023 · pp. 24–38 Read article