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Polysulfides as Soil ConditionersMcGeorge, W. T., Breazeale, E. L., Abbott, J. L. 06 1900 (has links)
No description available.
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Development of novel citrate-based dental tissue conditionersHassan, Muhammad January 2016 (has links)
Dental tissue conditioners are compliant, viscoelastic gels used primarily to form a soft cushion between the oral mucosa and the hard denture base. Their uses include the treatment of inflamed mucosa resulting from ill-fitting dentures and in treatment of denture related stomatitis. They are presented in powder/liquid format where the powder is usually poly(ethyl methacrylate) (PEMA) and the liquid is a mix of an aromatic ester (plasticiser, usually a phthalate) with ethanol. In use, the ethanol and plasticiser leach out with time causing the material to harden. In recent years there has been concern about possible toxic effects of the leached phthalate. Preliminary work has shown citrate plasticisers to be acceptable replacements for phthalates. Another disadvantage of the powder/liquid format is the porosity produced on mixing which can lead to microbial ingress and contamination. One possible solution would be to use a pre-gelled material which would have the advantages of easy application and reduced porosity. Candidal infections are a common etiological factor in denture related stomatitis. Earlier studies have shown it possible to release chlorhexidine diacetate (a broad spectrum antibacterial/antifungal agent) from powder/liquid tissue conditioners to treat these infections The aim of this study is to develop citrate-based pre-gelled and powder/liquid tissue conditioners and explore its use as potential drug delivery vehicle for chlorhexidine diacetate. The experimental pre-gelled system (EPGS) containing PEMA and acetyl tributyl citrate (ATBC) only showed stable Shore A hardness values over an 18 month time Abstract 5 period when stored at 7oC. The Shore A hardness and creep compliance ratio (flow) of EPGS indicated that it could be used as both a tissue conditioner and a temporary denture lining material, whereas experimental powder liquid system (EPLS), which contained 16 hours ball-milled PEMA powder and ATBC plus 5% ethanol, had more suitable properties for use as a tissue conditioner. Addition of chlorhexidine diacetate alone or with sodium fluoride did have an effect on the hardness and creep compliance ratio of the materials but these were within acceptable range. Both EPGS and EPLS containing 1% chlorhexidine had a higher percent release than those containing 9% chlorhexidine. The addition of sodium fluoride increased the release of chlorhexidine in all formulations.
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Latex and poly-DADMAC as soil conditionersBernas, Siti Masreah. January 1995 (has links) (PDF)
Copies of author's previously published articles inserted. Bibliography: p. 110-123. Two types of polymer, latex, a hydrophobic natural uncharged polymer, and, poly-diallyl dimethil ammonium chloride (poly-DADMAC), a hydrophilic synthetic positively charged polymer, were used as soil conditioners. Their effects on the stability of soil structure, hydrophobicity and on the growth of ryegrass were investigated. The study also monitored the rate of decomposition of latex in soil.
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Latex and poly-DADMAC as soil conditioners /Bernas, Siti Masreah. January 1995 (has links) (PDF)
Thesis (Ph. D.)--University of Adelaide, Dept. of Soil Science, 1997. / Copies of author's previously published articles inserted. Includes bibliographical references (p. 110-123).
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Effect of humus of different origin in moderating the toxicity of biocidesMader, Donald Lewis. January 1956 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1956. / Typescript. Abstracted in Dissertation abstracts, v. 16 (1956) no. 11, p. 1988. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves [68]-73).
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The effects of synthetic chemical soil conditioners on the structure of compacted turfgrass soils.McGuire, Edwin Dennis 01 January 1977 (has links) (PDF)
No description available.
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The diffusion of macromolecules in the soil pore spaceBarraclough, D. January 1975 (has links)
No description available.
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The effect of a biochemical soil additive on water infiltration, soil moisture, and yieldCosta, Jose Osorio, January 1973 (has links) (PDF)
Thesis (M.S. - Soils, Water and Engineering)--University of Arizona. / Includes bibliographical references.
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The effects of several chemical soil conditioners and an algal polymer on compacted soil and growth of cool season turfgrasses.Petrovic, Anthony Martin 01 January 1975 (has links) (PDF)
No description available.
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Studies on polymerised dispersions as soil conditioners : their effects and feasible applications.Bishop, Richard Timothy. 19 September 2014 (has links)
Thesis (Ph.D.)-University of Natal, Pietermaritzburg, 1978.
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