Thesis (Ph. D.)--Columbia University, 1924. / Biographical. Bibliography: p. 26.

Thesis (Ph.D.)--Boston University / The principal purpose of this investigation was to devise a means whereby natural or synthetic fibers might be dyed by the formation of ether, ester, or amide linkages. By so doing, the dyeing process would result in a very fast coloration unaffected by washing. For the purposes of preparing a colored ether of natural fibers, reactions wit h cellulose were tried with p-bromonitrosobenzene . It was hoped that this would give a p-nitrosophenyl ether of cellulose. This compound might itself be colored; but more important, it could be coupled with a variety of amines to give azo compounds. The compound p- br omonitrosobenzene, was chosen as the reagent for accomplishing this etherification, because it was the simplest, readily available nitrosocompound with a halogen group that could react fairly easily with cellulose. Attempts to prepare such a cellulose ether failed. The use of soda cellulose, or cellulose dissolved in benzyltrimethylammonium hydroxide, in a manner analogous to normal cellulose etherification reactions, resulted in failures. Rather than reacting with the cellulose, the nitroso compound decomposed rapidly to give p,p 1-dlbromoazoxybenzene in high yield. [TRUNCATED]

No description available.

An attempt was made to synthesize dyes of the triphenylmethane series, with vanillin as a starting material. Using conventional methods of dye preparation, several brilliant dyes were obtained, but only one of these was finally crystallized. A new method of triphenylmethane preparation was partially investigated. This consisted of condensing 3 methoxy 4 benzoyl benzal chloride, a new derivative of vanillin, with aryl compounds containing auxochrome groups. / Science, Faculty of / Chemistry, Department of / Graduate

This paper will examine and evaluate via computer simulations different methods, both adaptive and non-adaptive, for the feedback control of the color of dyed paper. The objectives are to maintain the paper color at a desired setpoint despite disturbances such as addition of recycled dyed paper (i.e. broke), and to perform color changes as smoothly as possible. The dynamics of a three dye system are multivariable and nonlinear with a significant transport time delay: thus the incentive for adaptive control. Several predictor-based and Dahlin controllers with gain scheduling are designed, tested in simulation, and compared. Adaptive versions using parameters identified with Recursive Least Squares (RLS) are also tested. For practical applications, the non-adaptive Dahlin algorithm with gain scheduling is shown to offer the best performance, together with relative ease of use. / Applied Science, Faculty of / Electrical and Computer Engineering, Department of / Graduate

No description available.

No description available.

No description available.

No description available.

No description available.