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1949 articles for “4-D” (ranking capped at the first 2,000 matches — narrow the search to see the rest)
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Design of Dielectric Resonator Antenna (DRA) for 4G LTE Applications
Abstract: AbstractIn this paper, a rectangular Dielectric resonator antenna (RDRA) is presented for 4G long-term evolution (LTE) applications. A metallic stripline feed is used to excite the antenna. A metallic strip line is used to increase the electric length of the port. Rectangular DRA is designed using FR4 substrate material having dielectric constant 4.4 and design is simulated with the help of high-frequency structure simulator (HFSS). Design antenna structure covered the …
Published in Journal of Microwave Engineering and Technologies · Vol. 5, Issue 2, 2018 · pp. 22–27 Read article
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Studies on Biological Degradation of 4-Bromophenol Using Anaerobic, Anoxic and Aerobic Bioreactors
Abstract: The present study investigates biodegradation of 4-Bromophenol (4-BP) and simultaneous removal of COD in anaerobic, anoxic and aerobic moving bed bioreactors. Cow dung slurry was used as a source of microbial consortium for acclimatization in moving bed reactors in batch mode. The acclimated microbial consortium was able to degrade various concentrations such as 5, 10 and 15 mg/l of 4-BP within specific time period. Biodegradation was evaluated by determining total …
Published in Journal of Modern Chemistry & Chemical Technology · Vol. 7, Issue 1, 2016 · pp. 37–41 Read article
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Molecular Docking and Pharmacokinetic Profiling of the Phytocompounds of Jatropha curcas as Antagonist for Salmonella typhi
Abstract: Background: Typhoid is an infection caused by the Gram-negative bacterium, Salmonella enterica serovar typhi. The study assessed the potential use of Jatropha curcas as a typhoid fever therapy alternative to traditional medications. The ability to uncover novel drug indications for currently available medications using in silico methods has increased thanks to the wealth of pharmacological and biological knowledge that is available. Objective: In this study, we assessed the potential inhibitory …
Published in International Journal of Cell Biology and Cellular Functions · Vol. 1, Issue 1, 2023 · pp. 67–81 Read article
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Novel 1,3,4-Thiadiazole Derivatives: Design, Synthesis, Characterization and Anticancer Evaluation – A Review
Abstract: Cancer remains one of the leading causes of mortality worldwide despite significant advances in diagnosis and treatment. The clinical usefulness of many anticancer drugs is often restricted by toxicity, poor selectivity, and the emergence of drug resistance. These limitations have encouraged the search for novel heterocyclic compounds with improved therapeutic efficacy and safety. Among these, the 1,3,4-thiadiazole scaffold has gained considerable attention because of its favorable physicochemical characteristics, metabolic stability, …
Published in Research & Reviews: A Journal of Drug Design & Discovery · Vol. 13, Issue 2, 2026 · pp. 42–49 Read article
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Effect of Genotype and Growth Regulators for the Callus Initiation and Regeneration of Mustard (Brassica napus)
Abstract: The present study is conducted to develop an efficient protocol for shoot and plant regeneration using four cultivars grown under the agricultural conditions of Bangladesh. Seed explants from four varieties were cultured in vitro and callus formation and swelling as well as the mode of shoot and root regeneration was evaluated. A highly positive response to in vitro culture, i.e., callus formation or swelling, was observed in all the varieties …
Published in Research and Reviews : A Journal of Biotechnology · Vol. 2, Issue 3, 2012 · pp. 1–11 Read article
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Progress in Pharmacological Potential of Thione Substituted 1,3,4-Thiadiazoles: A Review
Abstract: Heterocyclic nucleus 1,3,4-thiadiazole constitutes an important class of compounds for new drug development. From the last decade, good research is going on the 1,3,4-thiadiazole ring, as a result of which, many research groups has developed novel clinically useful compounds. These compounds had shown its importance as anti-inflammatory, analgesic, antimicrobial, antitumor, antifungal, antimycobacterial, anticonvulsant, antidiabetic, antiviral agents etc. So far, the modifications of the 1,3,4-thiadiazole ring has proven highly effective way …
Published in Research and Reviews: A Journal of Pharmaceutical Science · Vol. 3, Issue 2, 2012 · pp. 9–34 Read article
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Performance Improvement of SER in Linear Dispersive Coded 4x4 MIMO Systems using Precoding and Channel Encoding
Abstract: In this paper, Symbol-Error-Rate (SER) performance of Linear dispersive coded (LDC)4X4 MIMO system over Rayleigh and Rician fading channelshas been discussed. Channel encoder has been used to reduce the effect of the burst errors occurred due to noise. Convolution coding and inter-leaver has reduced the effect of burst noise in LDC system. Precoding requiring Channel state information at the transmitter (CSIT) has been used to lessen the effect of fading. …
Published in Recent Trends in Electronics Communication Systems · Vol. 2, Issue 3, 2015 · pp. 18–31 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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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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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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Clinical Profile of Dengue Patients who had a Prior Infection with the Covid 19 Virus in a Tertiary Care Centre
Abstract: This cross-sectional analytical study conducted in a tertiary care center aims to investigate the clinical profile of Dengue virus-infected patients with a prior history of COVID-19 within the last three years. Dengue, a prevalent tropical disease, ranges from mild fever to severe conditions like hemorrhagic fever and shock syndrome. The study utilizes the World Health Organization's 2009 classification for Dengue and delineates the febrile, critical, and recovery phases of infection. …
Published in Recent Trends in Infectious Diseases · Vol. 1, Issue 1, 2024 · pp. 34–38 Read article
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Behaviour of Three Legged 400 kV Double Circuit Steel Transmission Line Tower by Using Different Diaphragm Comparative Study
Abstract: Power is a vital solution for the growth of any country’s economy. India has the third largest producer of power in the world. As per the Census and Economic Information report, India has 1,06,991 GWh power capacity up to Mar. 2019. So, optimizations of transmission line towers are vital to reduce the cost the power sector and it’s depending on various factors, i.e. materials, size and shape of the section, …
Published in Journal of Structural Engineering and Management · Vol. 6, Issue 3, 2019 · pp. 20–31 Read article
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Quantitative Structure Activity Relationship Studies of Some New 4-Thiazolidinone Derivatives as Antimicrobial Agents
Abstract: In the present study, quantitative structure activity relationship (QSAR) studies have beenperformed on series of 24 compounds of 4-thiazolidinone derivatives with antimicrobialactivity using Chemoffice version 8.0 software. The QSAR models have been developed byusing multiple linear regressions in order to identify descriptors, which are actually focusingtowards the biological activity. Leave one out (LOO) method was employed in crossvalidation analysis to validate the developed model. The best predictive QSAR model derived,had …
Published in Research and Reviews: A Journal of Pharmaceutical Science · Vol. 8, Issue 2, 2017 · pp. 1–3 Read article
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In silico potential drug target identification against 4-aminobutyrate aminotransferase for Huntington diseases
Abstract: Huntington disease, HD is a progressive neurodegenerative disorder. Some excitatory chemicals released like glutamate which causes the cell damage and the neuron die due to over accumulation of the glutamate in Huntington diseases (HD), which is regulated by the GABA also known as gamma- amino butyric acid, it is a major inhibitory neurotransmitter of the nervous system. Here we are targeting the pyridoxal dependent enzyme which degrades the GABA neurotransmitter, …
Published in Research & Reviews: A Journal of Drug Design & Discovery · Vol. 4, Issue 3, 2017 · pp. 1–5 Read article
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Qualifying for Student Competencies through Reengineering
Abstract: The consortium of competencies required by a today's engineer are widening every day, thanks to reengineering, which accompanies in a horizon of information technology. The impetus was to make manual operations@ high technology physically less taxing. Various operations which were time consuming have now been made quicker and/or multi-tasking and so on. The new realization of meeting customer and societal requirements has facilitated a proponent that more accent is required …
Published in OmniScience: A Multi-disciplinary Journal · Vol. 5, Issue 1, 2015 · pp. 51–62 Read article
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Experimental Investigation of a 4-Stroke Diesel Engine for Varying Fuel Injection Pressure and Compression Ratio
Abstract: Diesel engines are widely used in transportation, agriculture, power sector and various other types of industries due to its high fuel efficiency. An improvement in the performance of the same makes remarkable difference in nation economy. This paper presents an experimental investigation of a 4-stroke engine, using diesel as a fuel. The engine is modified to study the effect of various parameters on the performance of engine. The parameters varied …
Published in Journal of Automobile Engineering and Applications · Vol. 3, Issue 3, 2016 · pp. 11–20 Read article
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Synthesis, Characterization and Biological Activity: Co(II), Ni(II), Cu(II) and Zn(II) Complexes of Schiff Bases Derived from 4-Cyanobenzaldehye and 4-Amino-5-Mercapto-3-Methyl/Ethyl-1,2,4-triazoles
Abstract: Co(II), Ni(II), Cu(II) and Zn(II) complexes of bidentate Schiff bases derived from the condensation of 4-amino-5-mercapto-3-methyl-1,2,4-triazole and 4-amino-3-ethyl-5-mercapto-1,2,4-triazole with 4-cyanobenzaldehyde have been synthesized. The synthesized Schiff bases and their metal complexes were then characterized by elemental analysis, spectroscopic methods (IR, NMR, electronic spectra), magnetic moment measurement and thermogravimetric techniques. The electronic spectra and magnetic moment studies suggest octahedral geometry for Co(II), Ni(II) and Zn(II) complexes and square planar geometry for …
Published in Journal of Modern Chemistry & Chemical Technology · Vol. 5, Issue 2, 2014 · pp. 27–36 Read article
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High Modulation Performance of a Designed InGaN Based 405 nm Multi-Quantum Well Violet Laser
Abstract: AbstractIn this work, the modulation performance characteristics of a designed 405 nm InGaN based multi-quantum well (MQW) Violet Laser are optimized and presented by varying injection current and differential gain. A maximum output power of 222.53 mW and a maximum resonance frequency of 18.79 GHz of the laser are obtained for 117 mA injection current, where, the differential gain is 4x10-16cm2. The differential quantum efficiency of the laser is obtained …
Published in Trends in Opto-electro & Optical Communication · Vol. 3, Issue 2, 2013 · pp. 7–13 Read article
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A Nobel Approach of Designing A 4 Bit Carry Skip Adder Using Reversible Logic
Abstract: This paper presents a method to designing Various Adder Circuits using CMOS Logic Style for Energy-Efficient Arithmetic Applications. We present Ripple Carry Adder, Carry Bypass Adder, Carry Look Ahead Adder and Carry Skip Adder in CMOS logic styles that lead to have reduced power-delay product (PDP). We executes a comparison against each other adders which finally provide result as having a low PDP, with reference to power consumption, speed and …
Published in Journal of VLSI Design Tools and Technology · Vol. 11, Issue 2, 2021 · pp. 24–34 Read article
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Chemical Constituents and Tyrosinase Inhibitory Activity of Aqueous Fraction of the Leaves of Morus alba L. from Vietnam
Abstract: The mulberry has been widely cultivated to feed silkworms. The leaves of mulberry have been used in traditional medicine as an analgesic, antitussive, cathartic, diuretic. In this study we have isolated three compounds (LC1-3) by chromatographic methods from the Mulberry leaves (Morus alba L.) collected in Thai Nguyen province, Vietnam. These compounds were identified as: Kaempferol-3,7-di-O-α-L-rhamnopyranoside (LC1), 7,4’-dihydroxy-5,3’-dimethoxyflavone (LC2), (S)-5,5’,7-trihydroxy-2’,4’-dimethoxy-6-methylflavanone (LC3). Their structures were elucidated by spectroscopic methods, including MS …
Published in Research & Reviews: A Journal of Drug Formulation, Development and Production · Vol. 4, Issue 3, 2017 · pp. 12–17 Read article