Colorado State University

About: Colorado State University is a education organization based out in Fort Collins, Colorado, United States. It is known for research contribution in the topics: Population & Radar. The organization has 31430 authors who have published 69040 publications receiving 2724463 citations. The organization is also known as: CSU & Colorado Agricultural College.

A General Model for Expansion of Extruded Products

Abstract: The expansions (cross-sectional, longitudinal and volumetric) of corn extrudates made with a single-screw extruder were studied. Longitudinal and Volumetric Expansion Indices were developed to characterize the product's specific length and volume. To explain the results, it was postulated that increased stored energy in the elastic starch melt occurring with higher shear strains favored radial expansion at the expense of longitudinal expansion. An inverse relationship between radial and longitudinal expansions was confirmed. A general expansion model involving dough moisture, melt temperature, and die and screw shear strains described all three expansions and characterized the thermally induced expansions with associated energies of activation.

Online Technologies Self-Efficacy and Self-Regulated Learning as Predictors of Final Grade and Satisfaction in College-Level Online Courses

Abstract: This study was designed to examine performance as a function of grade and course satisfaction in online undergraduate level courses, specifically students' self-efficacy for online technologies and self-regulated learning strategies. This research included a sample (N = 815) of community college students enrolled in liberal arts online courses during a single semester. The results of this study showed that online technologies self-efficacy scores were not correlated with student performance. Of the Motivated Strategies for Learning Questionnaire subscales, time and study environment and effort regulation were significantly related to performance. Students who scored higher on these subscales received higher final grades. In addition, rehearsal, elaboration, metacognitive self-regulation, and time and study environment were significantly positively correlated with levels of satisfaction.

Broad-spectrum resistance to bacterial blight in rice using genome editing

Abstract: Bacterial blight of rice is an important disease in Asia and Africa. The pathogen, Xanthomonas oryzae pv. oryzae (Xoo), secretes one or more of six known transcription-activator-like effectors (TALes) that bind specific promoter sequences and induce, at minimum, one of the three host sucrose transporter genes SWEET11, SWEET13 and SWEET14, the expression of which is required for disease susceptibility. We used CRISPR-Cas9-mediated genome editing to introduce mutations in all three SWEET gene promoters. Editing was further informed by sequence analyses of TALe genes in 63 Xoo strains, which revealed multiple TALe variants for SWEET13 alleles. Mutations were also created in SWEET14, which is also targeted by two TALes from an African Xoo lineage. A total of five promoter mutations were simultaneously introduced into the rice line Kitaake and the elite mega varieties IR64 and Ciherang-Sub1. Paddy trials showed that genome-edited SWEET promoters endow rice lines with robust, broad-spectrum resistance.

Diffusion in Saturated Soil. I: Background

Abstract: Recent studies suggest that diffusion may be an important, if not dominant, mechanism of contaminant transport through waste containment barriers. This paper represents the first of two papers pert...

Organocatalytic asymmetric epoxidation of olefins by chiral ketones.

Abstract: Chiral ketones have been shown to be effective organocatalysts for asymmetric epoxidation of olefins with broad substrate scope. High enantioselectivity has been obtained for a wide variety of trans and trisubstituted olefins, as well as a number of cis olefins, with encouragingly high ee's for some terminal olefins. The stereochemical outcome of the reaction can be rationalized by a spiro transition state model.