No description available.

Digitized by Kansas State University Libraries

Call number: LD2668 .T4 1929 S31

Call number: LD2668 .T4 1978 C37 / Master of Science

Four strains of the fluorescent pseudomonads were studied to determine the effect of controlled atmospheres on the growth and fluorescent siderophore production at pH 6.0 and 7.8. Bacterial strains were grown in Liquid King's Medium B for 48 hr in the presence of O2/CO2 combination percentages of 21.0/0.03, 18.3/3.0, 15.0/6.0, 12.0/9.0, and 9.0/12.0. The bacterial biomass was determined after centrifugation and the siderophores were isolated, partially purified, and quantified spectrophotometrically. Results showed a steady decline in growth and in siderophore production per unit biomass with decreases in the O2/CO2 ratio at pH 7.8 and to a lesser extent at pH 6.0. The average percentage changes in siderophore production levels, relative to control were +0.8, -1.2, -18.2, and -40.6 at pH 6.0; -33.0, -50.4, -66.8, and -64.1 at pH 7.8 in the presence of O2CO2 levels of 18.0/3.0, 15.0/6.0, 12.0/9.0, and 9.0/12.0, respectively.

The crystallization kinetics of diphenylhydantoin (DPH) has been studied at constant conditions in a small mixed suspension mixed product removal (MSMPR) crystallizer. Supersaturation is created by changing the pH of a DPH solution in the crystallization vessel. Crystal size distributions (CSD's) are measured by an in situ zone sensing method. Effects of pH and supersaturation on crystallization kinetics and CSD are summarized. The effect of an additive on the crystal growth of DPH has been studied in a batch system. Avoidance of nucleation in the early stages of crystallization is essential to the effect investigated.

This item was digitized as part of the Million Books Project led by Carnegie Mellon University and supported by grants from the National Science Foundation (NSF). Cornell University coordinated the participation of land-grant and agricultural libraries in providing historical agricultural information for the digitization project; the University of Arizona Libraries, the College of Agriculture and Life Sciences, and the Office of Arid Lands Studies collaborated in the selection and provision of material for the digitization project.

No description available.

The local authority building records of Worcester and Gloucester, two provincial county towns, were used to illustrate how aspects of urban development revealed by other research were evident in provincial towns between c.1870 and 1940. Local economic activity influenced the timing of building cycles, the extent and timing of which were discernible from the sequence of architectural styles used. The vernacular architecture of each town before 1914 had its own character. Development was influenced by the pre-existing pattern of land division, and by decisions taken by individual landowners when selling land for development. Gloucester Corporation was a major landowner, and the control exerted over local authorities by central government in the mid 19th century resulted in a distortion in the pattern of development around that city. Local building practice did not change dramatically after the introduction of bye-laws in 1858 because house types and street layouts used in both towns conformed with the byelaw requirements well before 1858. The scale of housebuilding projects was smaller than in other towns researched, and speculative builders did not operate far from their base before 1914. Qualified architects played very little part in the design of houses in Gloucester before 1914.

No description available.