Optimization
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Minimizing the Synthesis Time of Nanostructured Powders in Planetary Mills using Biogeography-based Optimization (BBO) Algorithm
Abstract: A key objective in processing of nanostructured powders via high-energy ball milling is to minimize the synthesis time. This paper presents the application of biogeography-based algorithm for optimization of milling parameters in order to minimize the synthesis time of nanostructured powders in planetary mills. At first a direct relationship between the inverse of the milling time and the power of the planetary mill was established, which allows the validation of …
Published in Journal of Nanoscience, NanoEngineering & Applications · Vol. 4, Issue 1, 2014 · pp. 6–18 Read article
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Optimization of Microbial Cellulose Production by the Newly Isolated Acetobacter sp. DR-1 under Laboratory Conditions
Abstract: Cellulose is the most abundant natural biopolymer on the earth, synthesized by plants, algae and also some species of bacteria. It is also produced by some animals (e.g., tunicates).Cellulose constitutes one of the three principal components present in plant, namely cellulose, hemi-cellulose and lignin. However, the degree of polymerization and crystallinity of bacterial cellulose is considerable high than that of plant cellulose. In microbes, cellulose is normally produced as exo-polysaccharide, …
Published in Research and Reviews : A Journal of Biotechnology · Vol. 1, Issue 1, 2011 · pp. 108–114 Read article
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Process Parameters Optimization for Ammonia Decomposition up to 99% in Coke Oven Plants
Abstract: Catalytic ammonia decomposition is carried out in the byproduct-plant of Coke Oven-3. This process is picking up due to its ability to decompose the ammonia recovered from coke oven gas. Because of the corrosive nature of ammonia, its removal is a necessity in coke oven byproduct plants. The process begins with the ammonia vapors coming from the ammonia distillation column. The vapors from the distillation unit flow into a refractory-lined …
Published in Journal of Modern Chemistry & Chemical Technology · Vol. 3, Issue 3, 2012 · pp. 30–36 Read article
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Screening of the Nutrient Parameters for Protease Production by Bacillus cereus Using Plackett-Burman Design under Submerged Fermentation
Abstract: Plackett-Burman experimental design was used to screen important nutrient parameters influencing the production of protease by Bacillus cereus, which was isolated from fish waste soil. The Plackett-Burman design is orthogonal in nature and it is a set of small and efficient experiments, which are very powerful in biotechnology research and development. Screening of 11 factors was done in 12 experiments. The 11 factors included one process parameter (initial pH of …
Published in Research and Reviews : A Journal of Life Sciences · Vol. 2, Issue 2, 2012 · pp. 26–31 Read article
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Optimization of Performance Parameters for Material Removal Rate in Side Flushing Form of Die Sink EDM
Abstract: In the present scenario, electrical discharge machining (EDM) is a well-established machining option for manufacturing geometrically complex or hard material parts that are extremely difficult to machine by conventional machining processes. EDM researchers have explored a number of ways to improve the efficiency including some unique experimental concepts. The operating performance measures of side flushing type of electrical discharge machining process on EN-31 die steel using copper electrode are being …
Published in Trends in Mechanical Engineering & Technology · Vol. 2, Issue 1, 2012 · pp. 7–14 Read article
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Taguchi based Modeling and Optimization of Tool Wear Rate in Die-Sink EDM
Abstract: With the increasing demand for new, hard, high strength, and temperature-resistant materials in various engineering applications, especially in the field of mold manufacturing, aeronautic, automobile and die manufacturing industries, the development and application of electro-discharge machining (EDM) has become increasingly important to machine such difficult to machine hard materials. In this paper, the machining of EN-31 Die steel using EDM with a copper electrode by using Taguchi’s experimental design and …
Published in Journal of Production Research & Management · Vol. 2, Issue 1, 2012 · pp. 30–35 Read article
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Designing of QMF Bank
Abstract: Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 Quadrature mirror filter (QMF) banks have been of great interest during the past decade. These filters find application where a discrete signal is to split into a number of consecutive bands in the frequency domain, so that sub-band signal can be processed in an independent manner and sufficient compression may be achieved. Typical processing includes under sampling the sub-band signals, encoding …
Published in Journal of Instrumentation Technology & Innovations · Vol. 1, Issue 2-3, 2011 · pp. 1–10 Read article
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Statistical Optimization of the Medium for the Production of α-Amylase by the Mutant Aspergillus flavus MS-12 Using Response Surface Methodology
Abstract: Normal 0 false false false EN-US X-NONE X-NONE /* 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-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; 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 present study is concerned with the improvement of Aspergillus flavus S-12 for α-amylase production. The mutant’s ability to produce α-amylase increased 1.24 times after …
Published in Research and Reviews: A Journal of Microbiology and Virology · Vol. 1, Issue 3, 2011 · pp. 13–23 Read article
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Effect of Different Carbon and Nitrogen Sources on the Production of Carotenoid Pigments by Phaffia rhodozyma
Abstract: Normal 0 false false false EN-US X-NONE X-NONE Carotenoids are natural compounds that are attractive in color and easy to extract from microorganisms. Astaxanthin is the principal carotenoid pigment responsible for the distinctive orange red pigmentation in marine invertebrates, fish and crustaceans. Phaffia rhodozyma (red yeast) produces astaxanthin as the major carotenoid. In the present investigation, improved astaxanthin production by the P. rhodozyma was performed with different carbon and nitrogen …
Published in Research and Reviews : A Journal of Life Sciences · Vol. 1, Issue 2, 2011 · pp. 8–12 Read article