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1975 articles for “6-dihydroxy-3-methoxy- 8- methyl xanthones” (ranking capped at the first 2,000 matches — narrow the search to see the rest)
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A New Protocol for The Synthesis of 5-(azidomethyl)-4-phenyl-1H- 1,2,3-triazole From Baylis-Hillman Adducts Derived from Nitro Olefins.
Abstract: The Baylis-Hillman adducts derived from nitroolefins have been convenientlytransformed into 5-(azidomethyl)-4-phenyl-1h-1,2,3-triazole via simple reaction condition. These compounds have been demonstrated for the synthesis of azidomethyl is highly biological reactive compounds. This novel bromo derivative of the BH adduct was simply treated with mole percentage of sodium azide in reactive condition. As a result, these novel azidomethylcompounds were extremely encouraging and provided fresh chances for building libraries of several new molecules. …
Published in Emerging Trends in Chemical Engineering · Vol. 9, Issue 2, 2022 · pp. 42–46 Read article
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Development of 12V-30W Solar Cell by Local Materials of Rural Bangladesh
Abstract: Sustainable social and economic development depends on adequate power generation capacity of a country. In order to increase the power generation by fuel diversification, the development of renewable energy is one of the important strategies. Bangladesh is one of the densely populated countries which do not have sufficient supply of energy. The present crisis in power supply hints at the troublesome time to come ahead. To cope with the exponential …
Published in Journal of Alternate Energy Sources & Technologies · Vol. 7, Issue 1, 2016 · pp. 39–43 Read article
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COMPOSITION, RADIATION DOSE AND TEMPERATURE DEPENDENT DEGRADATION STUDIES OF POLYAMIDE 6 HOMOPOLYMER AND COPOLYMERS
Abstract: Composition radiation dose temperature dependency on free radicals generated in PA6, PA6/ PA12 copolymer, has been investigated by electron spin resonance (ESR) and FTIR techniques. ESR spectra of -irradiated PA6 has shown complex shaped and number of hyperfine lines is observed to be in between 6-10. This complex spectrum is assigned to macro-radicals of the type ~CH2CHCH2~, which in principle has to give a ten line ESR spectrum. However, due …
Published in Journal of Catalyst & Catalysis · Vol. 5, Issue 1, 2018 · pp. 25–37 Read article
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Comparative Seismic Analysis of Composite Building Frames Considering Wind Pressure per I.S. 875-III: An ETABS-Based Review
Abstract: The seismic analysis of composite building frames, while factoring in wind pressure in accordance with the I.S. 875-III standards, stands as a pivotal imperative. It serves as the linchpin in guaranteeing not only the structural robustness but also the optimal performance of these edifices, ensuring they can withstand the formidable forces of nature with unwavering resilience.This study provides an in-depth and thorough analysis of past research endeavors that have delved …
Published in Journal of Construction Engineering, Technology & Management · Vol. 13, Issue 3, 2023 · pp. 1–8 Read article
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Development of Gesture Controlled Robot Using 3-Axis Accelerometer
Abstract: The diffusion of unstoppable juggernaut of computational innovations and artificial intelligence into our lives makes human-computer interaction (HCI) as the most emphasizing field for the current researchers and scientists. But the orthodox usage of mouse and keyboards for HCI makes our life tedious and stereotyped. After all to prosper the quality of life of elderly and physically challenged people, the improvisation of gesture control technology is a burning urgency. Thus …
Published in Journal of Control & Instrumentation · Vol. 7, Issue 1, 2016 · pp. 23–34 Read article
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A Multiband Microstrip-fed Slot Antenna for ITS/WLAN/WiMAX & IEEE 802.11a Application
Abstract: A microstrip-fed slot antenna for multiband operation is proposed. The antenna is printed on silicon substrate with thickness of 1.6 mm and dielectric constant of 11.9. A simple 50Ω microstrip line is used to excite the antenna. Small rectangular slots are fabricated on substrate to achieve multiband operation of 2.34–2.44, 3.73–3.77, 3.97–4.05, 4.59–4.79, 5.14–5.26, 5.49–5.57, 5.71–5.8 and 5.86–5.95 for lS1 1l ≤ −10dB. The designing has been done in IE3D …
Published in Journal of Electronic Design Technology · Vol. 4, Issue 1, 2013 · pp. 1–4 Read article
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Design of 6-Bit Two-step Flash ADC for High Speed and Low Power Applications
Abstract: In this paper, 6-bit two-step Flash ADC operated at the 2 GS/s is designed, with optimized performance for frequency domain applications. To get the best performance, the coarse convertor of 2-bit and the fine convertor of 4-bit are chosen. The comparator design is done with optimum power and area with two power supplies. Intermediate state accuracy increased by thermometer coded current steering DAC. The DNL and INL specifications are chosen …
Published in Journal of Electronic Design Technology · Vol. 3, Issue 1-3, 2012 · pp. 29–39 Read article
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Modification of Oscillating Mechanism of Table Fan for Throwing Air 360º
Abstract: Table fan is one of the common electric appliances used in houses, offices, shops and business establishments to provide air circulation which can greatly improve the atmosphere of any environment. Fan circulates the air, which enhances the evaporation rate of sweat from body, due to which body is cooled. There are many advantages of table fan compared to ceiling fan. Due to its portability, it can be used anywhere. The …
Published in Journal of Mechatronics and Automation · Vol. 3, Issue 1, 2016 · pp. 10–13 Read article
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Multi Objective Optimization in Turning Parameters of Al 6463 using Principal Component Analysis
Abstract: AbstractIn multi objective optimization, weight criterion of each objective is important for producing better and accurate solutions. Now a day, due to the growing requirement of the higher precision apparatus for its useful aspect, machining time (MT) and material removal rate (MRR) of a machined part plays a significant role in the modern manufacturing process. This study focuses on optimizing CNC turning parameters on Al 6463 based on principal component …
Published in Journal of Materials & Metallurgical Engineering · Vol. 7, Issue 2, 2017 · pp. 6–15 Read article
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A Review on an Investigation on the Effect of Immersed Medium in Friction Stir Welding of Aluminium Alloys (AA 6061-T6)
Abstract: Friction stir welding is solid state welding technology used for welding of low melting point metals such as Al, Mg and its alloys. FSW process can be controlled by different parameters like rotational speed, feed rate and welding medium. In this process, a cylindrical non-consumable tool, with a profiled probe (pin) rotating about its own axis is slowly plunged into the abutting edges of work pieces rigidly clamped to a …
Published in Journal of Materials & Metallurgical Engineering · Vol. 7, Issue 1, 2017 · pp. 9–16 Read article
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Optimization of Machining Parameters in Electric Discharge Machining of Al 65032
Abstract: Electric discharge machining has the potential to maintain surface topography and produce less stresses and destruction to the components. In this machining there is no contact between the tool and the work piece. The spark generated due to the electrostatic field generation between tool and the work piece. The objective of this experimentation was to create guidelines for electric discharge machining of Al 65032. Aluminum alloy 65032 is one of …
Published in Journal of Materials & Metallurgical Engineering · Vol. 5, Issue 3, 2015 · pp. 15–22 Read article
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Establishing Empirical Relationships to Predict Grain Size and Hardness of Pulsed Current Microplasma Arc Welded Inconel 625 Sheets
Abstract: Nickel alloys have gathered wide acceptance in the fabrication of components, which require high temperature resistance and corrosion resistance, such as metallic bellows used in expansion joints in aircraft, aerospace and petroleum industry. In case of single pass welding of thinner sections of this alloy, pulsed current microplasma arc welding was found beneficial due to its advantages over the conventional continuous current process. The paper focuses on developing mathematical models …
Published in Journal of Materials & Metallurgical Engineering · Vol. 1, Issue 1-3, 2011 · pp. 37–47 Read article
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Electrical Conductivity and Antibacterial Studies on Chemically Synthesized Poly (2-Methyl Aniline-co-2-Chloro Aniline)-Blend-Polyurethane
Abstract: AbstractElectrically conducting copolymer blend, poly (2-methyl aniline-co-2-chloro aniline)-blend-polyurethane has been synthesized chemically by oxidative polymerization technique using 0.3 M ammonium persulphate (APS) as oxidant, 0.1 M of the anionic surfactant, sodium lauryl sulphate and 1 M HCl as dopant. The formation of the copolymer blend has been confirmed by comparison with the spectral data obtained for the copolymer which was synthesized under the same conditions and characterized. The copolymer blend …
Published in Journal of Polymer & Composites · Vol. 5, Issue 1, 2017 · pp. 7–14 Read article
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Analysis of Oxidation Behavior on T-22 Boiler steel at 800°C
Abstract: The behavior of boiler steel T-22 in a rich air environment has been studied under the condition of isothermal at 800°C for 50 cycles in a cyclic manner. The kinetics of oxidation was established for boiler steel T-22under cyclic conditions for 50 cycles by weight change technique per unit area. Each cycle heating the sample at 1 hour followed by cooling 20 minutes at ambient temperature. Detonation gun spray techniques …
Published in Journal of Polymer & Composites · Vol. 8, Issue 1, 2020 · pp. 18–25 Read article
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Exploring the Influence of SS 316L Nanoparticle Integration on the Flexural Strength of PMMA
Abstract: In the present study, a nano composite PMMA was prepared with the help of hot plate magnetic stirring and probe sonication at different loading conditions of nano sized reinforcement material SS 316L. In order to study the effect of independent factors (the amount of reinforcement material, stirring speed, and sonication time) on response variable (flexural strength), the central composite experimental design of response surface methodology (RSM) was utilized. The analysis …
Published in Journal of Polymer & Composites · Vol. 12, Issue 2, 2024 · pp. 75–83 Read article
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Effects of Supply Voltage on 6T CNT Based Schmitt Trigger
Abstract: In this growing and developing age of technology, we are needed to improve our methods in order to get better results. So taking this into account, in electronic field, we want circuits with low propagation delay, leakage current and leakage power. So, we compared the model of Schmitt trigger using C-MOS (Complementary mosfet) and CNT (carbon nanotube) technology. We performed the variation in power supply (varied from 0.1to 1.2 V) …
Published in Journal of Power Electronics and Power Systems · Vol. 8, Issue 2, 2018 · pp. 19–24 Read article
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An Efficient Tree Structure 32-Bit Brent-Kung Adder for Reducing Time Delay and Memory Utilization
Abstract: AbstractBrent-Kung adder is such of the parallel prefix adders secondhand for speeding of the operation. Parallel prefix adders are the fast adders and dig the arithmetic operations at the expeditious rate. Most Industries are like TMSC, Texas, are used by parallel prefix adders seeing of their advantages compared to a variance adder. Parallel prefix adders are faster and area efficient. Parallel prefix adder is a campaign for increasing the speed …
Published in Journal of Semiconductor Devices and Circuits · Vol. 5, Issue 3, 2018 · pp. 29–35 Read article
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Performance Analysis of 3T DRAM Using FinFET Based with Leakage Reduction Techniques at 45 nm Technology
Abstract: The proposed area of research is to reduce the power consumption, leakage voltage, leakage current and leakage power of DRAM while maintaining the competitive performance. The Fin FET approach is used in DRAM for high performance. Fin type field effect transistors (Fin FET) are capable substitutes for bulk CMOS at the nano-scale. Fin FET are double gate device. A Fin FET uses an intrinsic body. It greatly suppresses the device-performance …
Published in Journal of VLSI Design Tools and Technology · Vol. 7, Issue 3, 2017 · pp. 28–34 Read article
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Carbon Nanotube Transistor Based Novel Ring Oscillator with Minimum Power Consumption at 32 nm Technology Node
Abstract: In this article an analysis of carbon nanotube field effect transistor based ring oscillator is performed. After analysis it was found that carbon nanotube transistor consumes less power in comparison to silicon transistor. CNFET is one possible candidate to substitute silicon-based integrated circuit (IC) technology, as the performance increase of conventional transistors witnessed during the last decades will arrive at its ultimate limits in the near future. Its present progress …
Published in Journal of VLSI Design Tools and Technology · Vol. 7, Issue 3, 2017 · pp. 51–54 Read article
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Implementation and Analysis of 32-bit pipelined RISC Processor Architecture
Abstract: Pipelining is an implementation technique, in which parallel operations are performed for several instructions simultaneously, to save time, enhance speed and for better utilization of hardware units. In this paper, 32-bit, 5-stage RISC processor is used to tag the pipeline stages to obtain the optimized results. The architecture of the processor containing several elements reduces the debugs and upholds the high performance through critical functions. When compared to our closest …
Published in Journal of VLSI Design Tools and Technology · Vol. 9, Issue 1, 2019 · pp. 1–14 Read article