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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
provided by the
Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
Search results
Showing 121 to 130 of 605 (0.067 seconds)| 121 |
The effect of tannins on the pulping of wood and the bleaching of pulpBard, John William 01 January 1940 (has links)
No description available.
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| 122 |
Fundamental investigation into oxidoreductase enzymatic bleaching systemsSealey, James E., II 12 March 1998 (has links)
No description available.
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| 123 |
Oxygen delignification process chemistry for AcaciaWidiatmoko 10 November 2006 (has links)
A series of laboratory oxygen delignification were performed in this study at constant oxygen pressure and consistency to study the response of the pulp to the different process parameters, i.e. reaction temperature, reaction time, soda addition, and mechanical pretreatment, to the zero span tensile strength loss. The basic chemistry of the oxygen delignified pulps was under study including fiber charge, celluloses/hemicelluloses, and hexenuronic acid. The fiber structure such as curl, kink, fines, and fiber length were also discussed. NaOH charge can be reduced as much as 50 % by applying mechanical pretreatment to obtain the same level of selectivity at the oxygen delignification conditions described in this study.Mechanical pretreatment prior to oxygen delignification promoted a better selectivity for both Acacia mangium and MHW pulps. MHW kraft pulp did not show a significant extractive removal in all pretreatment methods during oxygen delignification. The ultrasonic pretreatment followed by filtering induced the best extractive removal among the other three methods.
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| 124 |
The action of nitrogen dioxide upon unbleached pulpSigvardt, Charles M. January 1942 (has links) (PDF)
Thesis (Ph. D.)--Institute of Paper Chemistry, 1942. / Includes bibliographical references (leaf 38).
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| 125 |
A study of the bleaching of rag half stocks by calcium hypochlorite solutionsCrain, Richard Carter, January 1934 (has links) (PDF)
Thesis (Ph. D.)--Institute of Paper Chemistry, 1934. / Includes bibliographical references (leaves 73-82).
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| 126 |
Efficacy and safety of various tooth-whitening products, with special reference to the three dimensional colour space (L*a*b*) measurements and the microhardness testsMajeed, Abdul January 2011 (has links)
Tooth-whitening or tooth-bleaching has become an integral part of modern dental practice. Today, a large number of whitening products are available on the market which are commonly categorized into dentist-supervised home bleaching, in-office bleaching and over-the-counter bleaching products according to their mode of application. This thesis looks into safety and efficacy of various tooth-whitening products and methods.
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| 127 |
Fundamental aspects of hydrogen peroxide bleaching of kraft pulp in ECF and TCF bleaching sequencesStevens, Jefferson Allen 05 1900 (has links)
No description available.
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| 128 |
The effectiveness of TAED on peroxide bleachingAgrawal, Chhaya 08 1900 (has links)
No description available.
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| 129 |
Incorporation of environmental, economic and product quality criteria in multiobjective engineering design of Cl₂/ClO₂ softwood kraft pulp bleaching processesClayton, John Morris 05 1900 (has links)
No description available.
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| 130 |
Activated sludge biotreatability of pulp and paper bleach wastes : investigation of bleaching optionsBaker, Scott Alan 12 1900 (has links)
No description available.
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