Mountain Scholar
Mountain Scholar is an open access repository service that collects, preserves, and provides access to digitized library collections and other scholarly and creative works from Colorado State University and the University Press of Colorado. It also serves as a dark archive for the Open Textbook Library.
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Recent Submissions
Geoengineering: carbon dioxide removal
(Colorado State University. Libraries, 2024-2025) Rolston, Holmes, 1932-, author
A discourse about "geoengineering." Includes an anecdotal story about Dr. Rolston's grandparents.
The role of occupational stressors in sleepiness: a quantitative review
(Colorado State University. Libraries, 2024) DeArmond, Sarah, author
Krauss, Chen, DeArmond and Moorcroft (2003) called attention to the lack of research on workplace sleepiness. These authors also proposed a number of antecedents of workplace sleepiness, which included occupational stressors. The current study investigated the relationship between seven occupational stressors and workplace sleepiness/sleepiness surrogates via a meta-analytic approach. The results of the analyses showed that six of the occupational stressors (role ambiguity, role conflict, workload, interpersonal conflict, situational constraints, perceived control) had small to moderate relationships with workplace sleepiness/sleepiness surrogates (the relationship between traumatic/acute stressors and workplace sleepiness/sleepiness surrogates was not analyzed due to an insufficient number of relevant data points). Although moderators were suggested for the relationships between role ambiguity, workload, perceived control, and workplace sleepiness/sleepiness surrogates, only one potential moderator (type of workplace sleepiness/sleepiness surrogate scale) was investigated for the relationship between workload and workplace sleepiness/sleepiness surrogate because of practical constraints. The type of workplace sleepiness scale was not found to moderate the relationship. The meta-analyses suggest that this is an important area for future research.
Asymmetric conjugate additions to pyridine and quinoline
(Colorado State University. Libraries, 1984) Wettlaufer, David G., author; Meyers, A. I., advisor
Extensive studies have investigated the stereochemical and mechanistic aspects of NADH (nicotinamide adenine dinucleotide)mimics. With potential use in mind, chiral 4-methyl and 4-phenyl-1,4- d ihyd ropy rid ines were synthesized by alkylation of 3- oxazolinylpyridine. (This oxazoline and the oxazolinylquinoline below were derived from (1S,2S)-1-phenyl-2-amino-3-methoxypropanol). Addition of excess methyllithium gave the dihydropyridines, isolated as the methyl urethanes, in 85-90% de and 79-81% yield. This high stereoselectivity was found to be independent of temperature and concentration. The oxazoline was readily removed to the aldehyde in 60% yield fil quaternization with methyl fluorosulfonate followed by reduction and hydrolysis. Phenyllithium addition gave the addition products in 84% de and 94% yield. Chiral 4-methyl-1,4-dihydropyridines were also synthesized by alkylation of 3-imino pyridines with excess methyl cuprates. These imines were prepared from 3-pyridinecarboxaldehyde condensed with phenylalaninol, phenylalaninol methyl ether, (S)-ethylvalinate, and (S)-t-butylvalinate. The highest stereoselectivity was realized upon alkylation of the t-butylvalinate imine to give the dihydropyridines as the methyl urethanes in 56% de. Mild acid hydrolysis yielded N-carbomethoxy- 3-foDT\Yl-4-methyl-l,4~ihydropyridines in 82% yield.
College avenue, vol. 20, no. 2, winter 2024
(Colorado State University. Libraries) College Avenue, publisher
College avenue, vol. 20, no. 1, fall 2024
(Colorado State University. Libraries) College Avenue, publisher