Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 104 for “"Chrome"”.
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Fundamental aspects of the chrome tanning reaction
Fundamental elements of chrome-collagen interactions and the crosslinking mechanism at the molecular level have been investigated to gain detailed understanding that can be translated into improvements in the commercial process. Amide group hydrolysis during conventional liming proceeds by two …
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Design and synthesis of potential chrome-based anti-tuberculosis agents
… describes the design and synthesis of 4-(4-oxochromen-3-yl)-3,4-dihydropyrimidin-2-one derivatives and the assessment of their biological activity against a strain of the causative agent of TB. In this investigation, two classes of chromone-based compounds were synthesised. Different reactions …
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Surface textures on pyrope, picroilmenite and chrome diopside from Kimberlite
… of surface features on pyrope, picroilmenite and chrome diopside from kimberlite gives valuable information on the history of these minerals both during and after kimberlite emplacement. Descriptions and scanning electron photo-micrographs of surface features observed on these mantle-derived …
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Use of reactive chrome-complexes for the tanning of leather
Thesis: B.S., Massachusetts Institute of Technology, Department of Chemical Engineering, 1953
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Extraction, characterisation and application of gelatin from chrome-tanned leather waste
… to its toxic state, Cr(VI). The treatment of chrome-tanned leather waste described in this research occurs in three phases: dechroming; isolation of gelatin, and application of the gelatin produced in the finishing of leather. Chrome-tanned shavings were dechromed and subsequently used for the …
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Development of Environmentally Friendly Non-Chrome Conversion Coatings for Cold-Rolled Steel
… objective of the present work is to develop a chrome-free conversion coating for steel sheets. Various carboxylic acids and their salts have been studied for coating phosphated electrogalvanized (EG) steel sheets, including 10-undecenoic acid (UA), oleic acid (OA), and other fatty acids such as …
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Polyéthylène - Mise au point de techniques analytiques sur Catalyseurs et Prépolymères au Chrome
… de dosage de l'aluminium dans les catalyseurs au chrome - Mise au point d'une technique analytique (FX) sur les prépolymères Parmi les différentes qualités de polyéthylène, notamment celle destinée à l'extrusion-souflage, on peut utiliser un catalyseur à base de chrome. Pour des raisons de …
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Manual de marca y diseño de prototipo para Linguify, una extensión de Google Chrome
… prototipo de Linguify, una extensión para Google Chrome. Linguify nace con la misión de brindar la asistencia más efectiva y entendible para el mejoramiento de la pronunciación del idioma inglés. La herramienta permite esto mediante la escritura fonética, samples de audio y diagramas, así como los …
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Small scale chrome mining co-operatives in Zimbabwe and their relevance to the national economy
Includes bibliographical references.
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Small scale chrome mining co-operatives in Zimbabwe and their relevance to the national economy
Includes bibliographical references.
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The adoption of laser melting technology for the manufacture of functionally graded cobalt chrome alloy femoral stems
Total Hip Arthroplasty (THA) is an orthopaedic procedure that is performed to reduce pain and restore the functionality of hip joints that are affected by degenerative diseases. The outcomes of THA are generally good. However, the stress shielding of the periprosthetic femur is a factor that can …
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The Effect of Austenitization Temperature on the Microstructure, Bend Properties, and Hardness of a Chrome-Bearing White Cast Iron
… of heat treatments on the microstructure of chrome-bearing white irons and add bend test data to the literature concerning chrome-bearing white irons. This project was intended to support an existing line of research into cast metal-ceramic lattices using chrome white iron as a substitute for …
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The 21-dehydroxylation of corticosteroids: evidence for an enol intermediate and the hydroxylation of steroids by fungal cyto-chrome P450: evidence for a stepwise mechanism
… and the hydroxylation of steroids by fungal cytochrome P450. Deuterium labelling techniques were used to study the enzymic dehydroxylation. Corticosteroids doubly labelled (2H) at the C-21 position were incubated with a culture of Eubacterium lentum. It was found that t he enzymic dehydroxylation …
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Optimization of a Copper/Molybdenum Flotation Circuit by Depressing Pyrite from the Rougher Flotation Stage Using Different Scheme of Reagents
… was included as a modification to simulate chrome grinding media effect. Some studies have documented that there is a galvanic interaction between the grinding media - sulfide mineral system that affects the recovery of copper. Thus, researchers have used chrome grinding media resulting in …
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Characterization of Poly(ethyleneimines) by Electrohydrodynamic Ionization Mass Spectrometry and Investigations of the Mechanism of Surfactant-Sensitization of Metal-Chrome Azurol S Complexes (Sampling, Transport, Spectroscopy, Micelle)
Molecular weight distributions of poly(ethyleneimines) (PEIs) were characterized by Electrohydrodynamic Ionization (EH) Mass Spectrometry to determine the effect of both the chemical structure and the solution chemistry of the polymer on its sampling behavior from glycerol.
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Contact thermal lithography
… thermal lithography are presented. A traditional chrome-glass photomask is brought into contact with a wafer coated with a thermally sensitive polymer. The mask-wafer combination is flashed briefly with high intensity light, causing the chrome features heat up and conduct heat locally to the …
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Untersuchungen zu den Versagensmechanismen von Wärmedämmschicht-Systemen im Temperaturbereich von 900 C bis 1050 C bei zyklischer Temperaturbelastung
… between two cases. At a low activity of chrome in the MCrAlY, the carbon from the substrate can diffuse into the bond coating and leads there to local precipitations of chromium-carbide, that doesn't exert, however, any effect on the bonding of the MCrAlY. If the activity of chrome in the …
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Alkali attack on coal gasifier refractory lining
… products. Alkali distribution into the alumina-chrome refractory is rapid and the formation of the Na₂O⋅Al₂O/K₂O⋅Al₂O₃ compounds cause large volume expansion from the reaction surface which causes poor thermal shock resistance and eventual refractory failure. The hot face of an alumina-chrome …
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An Investigation of Wear-Resistant Coatings on an A390 Die-Cast Aluminum Substrate
… (CVT). The coatings tested were: hard chrome, electroless nickel metal, hard coat anodizing and composite ceramic coating. The primary clutch sheave material is a die-cast A390 aluminum. A wear test stand was developed to duplicate wear found on CVTs currently in use. The wear was …
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