Global ETD Search

31	A photometric study of the perception of object color Henneman, Richard Hubard, January 1935 (has links) Issued also as Thesis (Ph. D.)--Columbia University. / Bibliography: p. 86-88.
32	A comparison of the photomechanical reproduction quality from color negative films versus color transparency films / DuBois, Dawn Tower. January 1993 (has links) Thesis (M.S.)--Rochester Institute of Technology, 1993. / Typescript. Includes bibliographical references.
33	Color as cognitive artifact : a means of communication : language and message / Puhalla, Dennis M. January 1900 (has links) (PDF) Thesis (Ph. D.)--North Carolina State University, 2005. / Includes vita. Includes bibliographical references (leaves 124-132). Also available online in PDF format via North Carolina State University theses collection http://www.lib.ncsu.edu/theses/available/etd-03122005-112642/unrestricted/etd.pdf
34	Polyphenol oxidase of D'Anjou pears (Pyrus communis L.) Halim, David Husien 17 September 1976 (has links) Stability, substrate and inhibitor specificity and electrophoretic properties of a crude polyphenol oxidase (PPO) preparation extracted from d'Anjou pears (Pyrus communis L.) were investigated. Levels of polyvinylpyrrolidone and pH of buffer for extraction were found to affect the specific activity of the extracted enzyme. An extract prepared with 1.5 g insoluble PVP per 15 g fresh tissue in acetate buffer (pH 5.6) resulted in the highest PPO specific activity of the crude extract. Addition of PVP did not affect the electrophoretic patterns of PPO isozymes. The pH optimum of PPO occurs at 7.0. Heat inactivation of PPO followed first order kinetics and approximately 50% of PPO activity was inactivated after heating for 11.7, 6.25, 2.25 and 1.1 min at temperature of 70°,75°,80° and 85°C, respectively. The crude PPO enzyme was active towards o-dihydroxyphenols, but inactive towards monophenols. Disc electrophoresis on 7% polyacrylamide gels revealed eight active isozymes towards catechol, 4-methylcatechol, chlorogenic acid, caffeic acid, dopamine, d-catechin and DL-dopa. Similar electrophoretic patterns were observed with all substrates. No differences in the band patterns were observed between a fresh crude PPO preparation, a frozen crude extract and a dialyzed extract when catechol was used as substrate. L-cysteine, diethyldithiocarbamate, thiourea, metabisulfite, cyanide, mercaptoethanol and ascorbic acid inhibited the enzyme activity. L-cysteine and diethyldithiocarbamate were the most effective inhibitors. / Graduation date: 1977 Fruit -- Color
35	Whiteness constancy as a function of difference in illumination Hsia, Yün, January 1943 (has links) Issued also as Thesis (Ph. D.)--Columbia University. / Bibliography: p. 63. Color vision.
36	Die farbenbezeichnungen bei Ovid Mayer, Georg, January 1934 (has links) Inaug.-diss.--Erlangen. / Lebenslauf. "Literaturverzeichnis": p. 4-5. Ovid, Color.
37	A search for more brilliant color in the etching print Souden, James Gabriel, 1917- January 1953 (has links) No description available. Etching. Color.
38	Some meanings of colour in soils. Chomchan, Sopon. January 1973 (has links) No description available. Soils -- Color
39	Methods for presenting raspberry and strawberry samples to the Hunter color and color-difference meter Tinsley, Ian J., 1929- 29 April 1955 (has links) Graduation date: 1955 Fruit -- Color
40	The influence of enzymes on color deterioration of strawberry juice and concentrate Lee, Dai-lih Doris 01 March 1979 (has links) Graduation date: 1979 Fruit -- Color

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