Indiana University-Purdue University Indianapolis (IUPUI) / The purpose of this investigation was to evaluate the association between the depth of a carious lesion and the sclerotic dentin deposited beneath a calcium hydroxide methyl cellulose base material. The sample chosen consisted of teeth with deep caries and possible pulp exposure, as evidenced by a critical radiographic examination. Clinical procedures consisted of a preoperative serial radiograph, followed by complete caries removal. A barium sulphate radiopaque solution was then applied to the base of the preparation, followed by a second serial radiograph. The barium sulphate was removed and a calcium hydroxide methyl cellulose base was applied and the tooth restored with a silver amalgam alloy. Subsequently one, three, six, and nine month serial radiographs were taken postoperatively. Calcification change of sclerotic dentin overlying the pulp was measured in relation to pulpal floor width by the television instrumentation. The conclusions of this study are as follows: 1. A calcium hydroxide methyl cellulose base material acts as a "trigger mechanism," in deep cavities, stimulating the deposition of sclerotic dentin. 2. The thinner the initial pre-restored pulpal floor, the more rapid and dramatic is the postoperative pulpal floor increase in width, which is apparently a protective pulpal response. 3. During the periods of time when a significant increase in pulpal floor width was noted, the percent change in calcification of this area decreased. Conversely, when little pulpal floor width increase occurred, the percent change in calcification increased.

Thesis (M.Sc.D.)--Boston University School of Graduate Dentistry, June 1967. / 168 pages plates 29 cm.

Abstract Production of pulp and paper from raw wood involves the washing of substantial quantities of highly coloured material from the wood pulp. Although most of this colour is trapped within the mill and the mills wastewater treatment system, discharge of coloured wastewater remains a problem of public concern. Lake Rotorua, New Zealand is filled with sediment consisting almost exclusively of diatoms. The most abundant species, Aulacoseira, has been shown to have very small pores, less than 200 nm, that could be very useful for the capture and holding of large organic molecules. Lake Rotorua is situated close to the two largest pulp and paper mills in New Zealand and may have to be dredged to solve a problem of eutrophication. Wastewaters generated at the Kinleith (Tokoroa) and Tasman (Kawerau) mills in the North island of New Zealand have been used to assess the characteristics of colour removal by Lake Rotorua diatoms. Vacuum filtration through the diatoms succeeded in removing colour but proved to be impractically slow as an industrial process. Addition of diatoms to wastewater streams in stirred experiments showed that significant adsorption took place. The majority of the colour was removed within 30 seconds of mixing. The efficiency of colour removal was found to vary between wastewater streams within the mills. The pH dependency of this removal was tested and found to be most effective in a pH range of 3.6 to 5. Attempts to reuse the diatoms showed that chemical backwash regimes were more effective than calcination. This study concluded that surface silanols were likely to be the principle agent in forming coagulants with the colour material and were subsequently trapped on the diatom surfaces, but more importantly within the pores.

Thesis (Ph. D.)--Institute of Paper Chemistry, 1967. / Bibliography: leaves 101-104.

Thesis (Ph. D.)--Institute of Paper Chemistry, 1953. / Bibliography: leaves 144-148.

No description available.

Thesis (M.S. - Civil Engineering and Engineering Mechanics)--University of Arizona, 1986. / Includes bibliographical references (leaves 81-82).

Thesis (M. For. Sc.)--University of Canterbury, 2008. / Typescript (photocopy). Includes bibliographical references (leaves 46-47). Also available via the World Wide Web.

Thesis (M.S.)--Virginia Polytechnic Institute, 1961. / Vita. Abstract. Includes bibliographical references (leaves 83-89). Also available via the Internet.

Thesis (M.S.)--University of Michigan, 1966.