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Full-Text Articles in Physical Sciences and Mathematics
Cystic Fibrosis: Cluster Analysis Of Microbiology And Pulmonary Function, Lori Lee M. Larson '91
Cystic Fibrosis: Cluster Analysis Of Microbiology And Pulmonary Function, Lori Lee M. Larson '91
Honors Projects
In an attempt to find a relationship between pulmonary infection and pulmonary function in cystic fibrosis (CF) patients, microbiology data and pulmonary function test (PFT) data for clinic patients' visits were obtained from the University of Minnesota Relational Database. The two files were merged, totaling 12,193 cases, and then analyzed using a quick cluster subroutine of SPSSX on the University of Illinois IBM Mainframe System. QUICK CLUSTER analysis showed a relationship between the virulence of the microorganisms, the amount of growth of the microorganisms, and the pulmonary function test scores of CF patients
The Theorms Of The Alternative, Kathryn L. Balsman '91
The Theorms Of The Alternative, Kathryn L. Balsman '91
Honors Projects
In layman's terms, a Theorem of the Alternative is a theorem which states that given two conditions, one of the two conditions is true. It further states that if one of those conditions fails to be true, then the other condition must be true. Mathematically, this does not give a very clear picture of this group of theorems, however. Katta Murty defines a typical Theorem of the Alternative as one which shows that corresponding to any given system of linear constraints, system I, there is another associated system of linear constraints, system II, based on the same data, satisfying the …
The Limitations Of Women In Science At Six Midwestern Colleges Due To The Adherence To Conceptions Of Gender Differences Between The Sexes In The Years Of 1880 Through 1940, Denise Mohney '91
Honors Projects, History
It is difficult for college students today to imagine life when the term "discrimination" had not yet been defined or conceived. Yet only a little more than a hundred years ago women were first entering the academic world alongside men. These were often middle class women whose primary interactions with men had been through courtship and marriage. It was questioned whether women's intellectual ability and physical stamina were strong enough to persevere through the college experience. Scientists and physicians, writing for the general public, cited evidence that besides physical distinctions between the sexes, there were also intellectual and emotional differences. …
Electrostatically Paired Porphyrin And Phthalocyanine: Equilibria And Electrochemical Oxidation, Libin Ho '91
Electrostatically Paired Porphyrin And Phthalocyanine: Equilibria And Electrochemical Oxidation, Libin Ho '91
Honors Projects
A synthetic model system for the special pair in the photosynthetic reaction center of bacteria has been prepared from electrostatically paired porphyrin and phthalocyanine molecules. Use of rigorously dry propylene carbonate as the solvent allowed complex fonnation to occur between tetra-(N-methyl-4-pyridyl)porphyrin hexafluorophosphate (H2TMPyP(PF6)4) and tetraphenylphosphonium tetrasulfatophthalocyanine (Ph4P)4H2TSPc molecules. The stoichiometry of the complex was determined to be 1:1 by Job's method and the pair formation constant K1 was estimated to be 1x108.T he dependence of K1 on ionic strength was studied at various concentrations of tetra-n-butylammonium tetrafluoroborate BU4NBF4. With increasing ionic strength K1 decreases as expected according to the Debye-Huckellimiting …
The Reactions Of N-Phenylaminoiminomethanesulfonic Acid (Paimso) With Meldrum's Acid, Milana-Minja Maletic '91
The Reactions Of N-Phenylaminoiminomethanesulfonic Acid (Paimso) With Meldrum's Acid, Milana-Minja Maletic '91
Honors Projects
No abstract provided.
Synthesis Of Aliphatic Bis(Thioureas), Donald G. Mcewen Iv '91
Synthesis Of Aliphatic Bis(Thioureas), Donald G. Mcewen Iv '91
Honors Projects
The synthesis of aliphatic bifunctional thioureas have been attempted using several nucleophilic displacement reactions. The first method involved treatment of an aliphatic diamine with ammonium thiocyanate, under two different sets of reaction conditions. The first set of reaction conditions utilized water as the solvent, while second employed acetone as the solvent. Both of the reactions utilizing l,2-ethylenediamine and ammonium thiocyanate did not afford the desired bis(thioureas). In particular, the crystalline solid obtained from the reaction carried out in water was 57.8 ± 0.05 % thiocyanate by mass. The second nucleophilic addition method involved the treatment of both 1,2-ethylenediamine and 1,6-hexanediamine …