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107 articles for “HF”
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Enhancement of Gain & Bandwidth Microstrip Rectidollar Patch Array Antenna for Satellite Applications
Abstract: Over few decennary there is fastest growth in the field of satellite communication and it has its wide application in this field. There is many variety of antennas which can be used for satellite applications and the preference is given to microstrip antennas because of its merits and applications. This research includes the designing of a rectidollar patch array. In this the feeding given is microstrip feeding. The whole desigining …
Published in Recent Trends in Parallel Computing · Vol. 5, Issue 2, 2018 · pp. 25–30 Read article
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Failure Analysis of Bearing: A Review
Abstract: Ball and rolling element bearings are perhaps the most widely used components in industrial machinery. They are used to support load and allow relative motion inherent in the mechanisms involved, preventive measures and recommended corrections to enhance the life of the bearing. In this paper, the most widely referred mechanisms are reviewed and discussed, and their limitations are addressed. Heat flows within a bearing, scanning electron microscope (SEM), Fourier infrared …
Published in Trends in Machine design · Vol. 3, Issue 3, 2016 · pp. 43–59 Read article
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Natural Bond Orbital, Bond Order and Frequency based Study of Hydrogen Bond Formation in Different Glycols-Water Complex
Abstract: Natural bond orbital (NBO) analysis, natural atomic orbital (NAO) analysis, Wiberg bond order, vibrational frequency, free energy and enthalpy changes for hydrogen bond formation in different polyethylene glycol + water complex and dipropylene glycol + water complex have been performed by Hatree Fock (HF) method, second order Møller–Plesset perturbation theory (MP2) and Density Functional Theory (DFT) using 6-31++G(d,p) basis set. In order to describe hydrogen bond interaction appropriately, B3LYP DFT-D, …
Published in Journal of Modern Chemistry & Chemical Technology · Vol. 4, Issue 1, 2013 · pp. 1–20 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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‘Betazen’ Herbal Formulation, Ameliorates Experimentally Induced Metabolic Disturbances in Insulin Resistant Rats
Abstract: The present study was designed to evaluate anti-diabetic activity of ayurvedic formulation ‘Betazen’ in experimentally induced insulin resistant rats. Wistar rats were being rendered insulin resistant by administration of dexamethasone (2 μg/day s.c), along with high fat-high sugar (HFHS) diet (i.e. vanaspati ghee and fructose enriched) for 42 days. Animals with fasting blood glucose levels (BGL) of more than 150 mg/dl were selected, divided into different groups and administered 2.7 …
Published in Research and Reviews: A Journal of Pharmacology · Vol. 6, Issue 2, 2016 · pp. 13–23 Read article
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Reduction of Greenhouse Gases by Carbon Neutral Fuels in Shipping
Abstract: The earth environment is changing very rapidly nowadays. Besides that, earth showing its disturbance in the form of natural disaster and rapid climate changes. It is believed to have started in the 18th century, as a result of industrial revolution. During this period, industries were developed rapidly without having any safety measures, which leads to accumulation of various poisonous gases in atmosphere called Greenhouse Gases (GHG). Its effect was also …
Published in Journal of Offshore Structure and Technology · Vol. 7, Issue 1, 2020 · pp. 32–40 Read article
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Molecular structure, Vibrational spectroscopic, HOMO, LUMO, NBO, and NLO studies of 4-Cyano-2-methoxybenzenesulfonyl chloride
Abstract: The vibrational spectroscopic studies of 4-Cyano-2-methoxybenzenesulfonyl Chloride (4C2MBSC) were carried out. 4C2MBSC and its derivatives present in many biologically active compounds. The spectroscopic properties and chemical significance in particular, sulfonyl chloride and its derivatives have been studied extensively by spectroscopic (FTIR spectra) and theoretical methods. The infrared spectrum of this compound was recorded in condensed states. The molecular geometry, highest occupied molecular orbital (HOMO), lowest unoccupied molecular orbital (LUMO), first …
Published in Journal of Modern Chemistry & Chemical Technology · Vol. 9, Issue 2, 2018 · pp. 8–18 Read article