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370 articles for “absorbance”
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Two New, Useful and Facile Stability-Indicating UV Spectrophotometric Methods for the Determination of Rosiglitazone in Pharmaceuticals
Abstract: Rosiglitazone (ROS) is an antidiabetic drug belonging to the thiozolidine class. Two simple, rapid, sensitive, accurate and reproducible UV-spectrophotometric methods were developed and subsequently validated for the determination of ROS in bulk and tablet form. The methods are based on the measurement of the absorbance of the drug solution either in 0.1 M NaOH (NaOH method) or in 0.1 M HCl (HCl method) at 316 nm in both instances. The …
Published in Research and Reviews: A Journal of Pharmaceutical Science · Vol. 8, Issue 2, 2017 · pp. 8–19 Read article
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Analysis of Color and Particulate Depolarization Ratio Profiles for Aerosols using CALIPSO Level 2 Data
Abstract: Aerosols have an important impact on Earth’s climate system by absorbing, scattering and modifying cloud properties. There are many sources of aerosols; both natural and resulting from human activities with widely varying distribution both in space and time. In addition to aerosol columnar spatio-temporal variation, the vertical profile temporal studies provide valuable inputs to various climatic models and radiative transfer studies. This study focuses on the analysis of color ratio …
Published in Journal of Remote Sensing & GIS · Vol. 6, Issue 2, 2015 · pp. 1–5 Read article
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A Review on Roughened Solar Air Heater for Heat Transfer and Thermal Efficiency
Abstract: The use of artificial roughness on the absorber plate is the most effective technique to enhance the thermal performance of solar air heaters. Experimental investigation of distinct roughness geometries shows that the enhancement in the rate of heat transfer is accompanied by considerable rise in temperature. In this paper some distinguished roughness geometries have been compared on the basis of heat transfer rate and thermal performance. The objective of this …
Published in Journal of Experimental & Applied Mechanics · Vol. 6, Issue 1, 2015 · pp. 49–56 Read article
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A Novel Method for Isolation of Plumbagin
Abstract: Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} The Plumbagin (5-hydroxy-2-methyl-1, 4-naphthoquinone) is the characteristic naphthoquinone present in the different species of the plant Plumbago (Family: Plumbaginaceae) commonly known as Chitrak in India. Plumbagin is …
Published in Research and Reviews: A Journal of Pharmacology · Vol. 1, Issue 2, 2011 · pp. 1–6 Read article
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Altitude Related Variation of Antioxidant Properties of Tea Leaf (Camellia sinensis)
Abstract: Places, in the high altitude are subject to higher UV radiation as compared to places of low altitude, provided they bear the same latitudinal location. Here, in this investigation, the oxidative stress and associated cell protection in tea plants growing in Mysore (12°30′ N 76°65′ E, 770 m) and Ooty (Dodabeta – 11°4090′ N, 76°6966′ E, 2623 m) has been studied. The UV radiation varies in these two places – …
Published in Research and Reviews: A Journal of Microbiology and Virology · Vol. 4, Issue 2, 2014 · pp. 1–6 Read article
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Biochemical, Antimicrobial Characterization of Dooars Tea (Camellia sinensis) Clone during CTC Manufacturing
Abstract: Industrial manufacturing of CTC tea includes different stages. The polyphenol content catechins are oxidized from stage 1–4 (including withering, cutting/tearing, fermentation/oxidation and drying processes). The catechins are polymerized to tannins with the help of enzyme polyphenol oxidase (PPO), both classes of compounds show differential antioxidant (total flavonoid content, UV absorbing compounds content, antioxidant enzyme Phenylalanine ammonia lyase activity is changed), antimicrobial and therapeutic potentials, usually reduced in late (dried) stages. …
Published in Research and Reviews: A Journal of Microbiology and Virology · Vol. 5, Issue 2, 2015 · pp. 5–14 Read article
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MYCOSYNTHESIS OF SILVER NANOPARTICLES AND INVESTIGATION OF THEIR ANTIMICROBIAL ACTIVITY
Abstract: The silver nanoparticles were formed in contact with the cell free filtrate of Alternaria alternata. The nanoparticles were characterised by means of UV-Vis spectrophotometer, Transmission electron microscopy (TEM), Dynamic Light Scattering (DLS), Energy-dispersive X-ray (EDX), X-ray Diffraction (XRD) and Fourier Transform Infra-red Spectroscopy (FTIR). The synthesized silver nanoparticles showed an absorbance maximum at 420 nm in the visible range. Transmission electron microgram and particle size distribution curve showed the formation …
Published in Journal of Nanoscience, NanoEngineering & Applications · Vol. 1, Issue 1, 2011 · pp. 17–26 Read article
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Extracellular Biosynthesis of Silver Nanoparticles using the Fungus Pleurotus ostreatus and their Antibacterial Activity
Abstract: In the present study, an eco-friendly process for the synthesis of nanomaterials using a fungus (Pleurotus ostreatus) has been attempted. The fungus supernatant of seed culture was used for the biosynthesis of silver nanoparticles. The aqueous silver ions were reduced to silver metal nanoparticles when treated with the fungal supernatant. After 72h of treatment, silver nanoparticles were obtained. These silver nanoparticles were characterized by UV–Vis spectroscopy, scanning electron microscopy (SEM), …
Published in Journal of Nanoscience, NanoEngineering & Applications · Vol. 2, Issue 2, 2012 · pp. 28–38 Read article
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Synthesis of Silver Nanoparticles by Biological Method and its Application in Protection of Wood from Ganoderma Species
Abstract: The major advancement in the field of nanotechnology during the last decade have resulted in the wide spread application of nanomaterials in the field of science and technology. Nanoparticles were synthesised biologically, which is a pure green chemistry and completely toxic free compared to chemical synthesis. The property of the reductases present in the E. coli culture filtrate reduces silver nitrate to silver oxide and also serves as a capping …
Published in Journal of Nanoscience, NanoEngineering & Applications · Vol. 3, Issue 1, 2013 · pp. 37–43 Read article
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Semi-quantitative Event Specific Detection of Bt Maize (Event MON 810) using Real-Time PCR with SYBR Green Ι Chemistry
Abstract: The objective is this work is to do semi-quantitative analysis for Bt maize (event MON 810) using conventional Polymerase Chain Reaction (PCR) and Real Time PCR (SYBR green chemistry) from the fresh maize samples chosen arbitrarily from various locations. The protocol for extraction of good quality genomic Deoxyribonucleic acid (DNA) was standardized without the use of Liquid nitrogen. The DNA used for further studies were obtained by using standardized protocol. …
Published in Research and Reviews : A Journal of Biotechnology · Vol. 2, Issue 3, 2012 · pp. 25–34 Read article
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A Study on The Optimization of Culture Conditions using NPK, A Commercial Fertilizer for Increase in the Biomass of Microalgae, Scenedesmus Bujigatus
Abstract: Algal biomass is rich in all the required nutrients for human body and acts as food as well as medicine in the treatment of a number of therapeutic and chemo preventive diseases. Algae are capable of enhancing nutrient contents of the conventional human food. This may be assigned to their healthy and balanced chemical composition. The current study aims to investigate the light absorption characteristics of the microalgae, Scenedesmus bujigatus …
Published in Research and Reviews : A Journal of Biotechnology · Vol. 1, Issue 1, 2011 · pp. 1–3 Read article
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Production of Bioflocculants from Bacillus subtilis-2162 and Determination of Its Flocculating Activity on Heavy Metal Chromium
Abstract: The bioflocculant production potential of Bacillus subtilis-2162 was evaluated using standard methods. The bacteria produced an extracellular bioflocculant. Culture conditions for optimal production of the bioflocculants include: glucose and sucrose as carbon sources; multiple + 2 nitrogen sources including: ammonium sulfate and yeast extract; Ca+2 as sole cation source; and initial medium of pH 7. Characterization of the pure bioflocculants revealed that it is thermostable. Hydroxyl, carboxyl and amino groups …
Published in Research and Reviews : A Journal of Biotechnology · Vol. 3, Issue 3, 2013 · pp. 12–18 Read article
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Design Boiling Water Reactor Core Model Using MCNPX for Studying the Burnable Poisons and the Axial Enrichment Fuel Effect on the Neutronic Characteristics
Abstract: The incorporation of gadolinium directly into nuclear fuel is important for improving the reactor behavior and satisfying the safety criteria during the core lifetime. MCNPX (Monte Carlo N–Particle code extended) has been used for designing Advanced Boiling Water Reactor model. MCNPX code based on Monte Carlo method, is used to design a three-dimensional model for a BWR fuel assembly in a typical operating temperature and pressure conditions. This model has …
Published in Journal of Nuclear Engineering & Technology · Vol. 3, Issue 1, 2013 · pp. 21–35 Read article
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Radio-Assay of Plant Samples at the Proposed Nuclear Reactor Site in Geregu, North-Central Nigeria
Abstract: Radio-assay of plant samples at the Geregu site, North-Central Nigeria, was evaluated to determine the radiological burden on the environment. Plant samples were collected from ten different locations on the site and the concentrations were measured using gamma spectroscopy. Radiological equivalent dose was estimated using standard analytical methods. The mean value for the external outdoor absorbed gamma dose rates due to terrestrial γ-rays from the nuclides Ra-226, Th-232 and K-40 …
Published in Journal of Nuclear Engineering & Technology · Vol. 5, Issue 3, 2015 · pp. 6–13 Read article
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SOR Process: A Tool for Reduction of SO2 Emission
Abstract: Sulphur dioxide (SO2) emissions are prominently due to burning of fossil fuels at power plants and other industrial facilities, as well as fuel combustion in mobile sources such as locomotives, ships, and other equipment. Rapid SO2 emission has in recent times become a major source of concern because it can cause breathing problems, respiratory illness, changes in the lung's defenses, cardiovascular diseases and damage to vegetation and building due to …
Published in Journal of Energy, Environment & Carbon Credits · Vol. 5, Issue 3, 2015 · pp. 1–7 Read article
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Damping Techniques for Controlling Edgewise Vibration of Wind Turbine Blades
Abstract: AbstractEdgewise vibrations with low aerodynamic damping are of particular concern in modern multi-megawatt wind turbines, as large amplitude cyclic oscillations may significantly shorten the life-time of wind turbine components, and even lead to structural damages or failures. In this paper, five types of damping methods are studied. The tuned liquid dampers utilize the sloshing motion of the fluid to suppress structural vibrations and become a natural candidate for damping vibrations …
Published in Journal of Energy, Environment & Carbon Credits · Vol. 7, Issue 2, 2017 · pp. 26–33 Read article
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Applications of nanotechnology in Agriculture
Abstract: Nanotechnology is expected to open new way by making a very significant impact on the world’s economy, industry and people’s lives. With the increased globalization of agricultural and food industry, there is a necessity of a developed and innovative tool to restructure the agricultural and food industry through diagnosis and treatment of diseases, enhancing the ability of plants to absorb nutrients and resist microbial and pest infectionsusing the aspects of …
Published in Journal of Nanoscience, NanoEngineering & Applications · Vol. 8, Issue 1, 2018 · pp. 20–27 Read article
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Variation of PbS Layer Thickness in Colloidal Quantum Dot Solar Cell
Abstract: The broad tuning of semiconductor band structure is proposed for colloidal quantum dot via the quantum size effect by several workers. In this paper, we define brief details on effect of the thickness of lead sulphide (PbS) layer as the absorbing photovoltaic materials in the colloidal CQD solar cell and show their effect on the performance of the solar cell. The calculated results shows that with lower thickness of 180 …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 6, Issue 1, 2019 · pp. 1–4 Read article
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Green Synthesis of Selenium Nano-metalloid from the extract of Cabbage (Brassica oleracea var. capitata) leaf and its Antimicrobial Activities
Abstract: Green synthesis specifies the creation of nano-size particles (NPs) by a biological process using the reducing properties of metabolites in the plant extracts. The present work reports the use of cabbage (Brassica oleracea var. capitata.) leaf extract as a reducing and stabilizing agent to synthesize selenium nanoparticles (SeNPs) via the green route of synthesis. The as-prepared SeNPs were analyzed by UV–vis spectroscopy, FTIR, DLS, SEM, and EDX. Nano-crystalline SeNPs has …
Published in Journal of Nanoscience, NanoEngineering & Applications · Vol. 9, Issue 1, 2019 · pp. 12–20 Read article
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Fan Blade Containment Capability of Hybrid Fancase System
Abstract: For an aero engine containment casing is vital for containing any fan blade out event. Most of the containment casing being used are made up of hard wall approach and are designed conservatively by adding extra wall thickness for safety. Even a small reduction in the weight of an aero engine will help in bringing down the operating costs of the aircraft, which can be adopted by a new design …
Published in Journal of Aerospace Engineering & Technology · Vol. 9, Issue 1, 2019 · pp. 15–22 Read article