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Interplay Between Differentially Expressed Enzymes Contributes to Light Color Acclimation in Marine Synechococcus
Get PDFMarine Synechococcus, a globally important group of cyanobacteria, thrives in various light niches in part due to its varied photosynthetic light-harvesting pigments. Many Synechococcus strains use a process known as chromatic acclimation to optimize the ratio of two chromophores, green-light-absorbing phycoerythrobilin (PEB) and blue-light-absorbing phycourobilin (PUB), within their light-harvesting complexes. A full mechanistic understanding of how Synechococcus cells tune their PEB to PUB ratio during chromatic acclimation has not yet been obtained. Here, we show that interplay between two enzymes named MpeY and MpeZ controls differential PEB and PUB covalent attachment to the same cysteine residue. MpeY attaches PEB to the light-harvesting protein MpeA in green light, while MpeZ attaches PUB to MpeA in blue light. We demonstrate that the ratio of mpeY to mpeZ mRNA determines if PEB or PUB is attached. Additionally, strains encoding only MpeY or MpeZ do not acclimate. Examination of strains of Synechococcus isolated from across the globe indicates that the interplay between MpeY and MpeZ uncovered here is a critical feature of chromatic acclimation for marine Synechococcus worldwide
The Home Front: The Experience of Soldiers and Civilians in the Louisiana Maneuvers of 1940 and 1941
Get PDFIn the years before and during World War II, the United States Army conducted a series of military maneuvers in north-central Louisiana. The two biggest maneuvers occurred in May 1940 and September 1941. The Louisiana Maneuvers are credited with helping to prepare the U.S. armed forces for World War II. Previous studies of the 1940 and 1941 maneuvers have focused on the day-to-day activities during the maneuvers or the generals behind the maneuvers. This study will focus on the impacts of the maneuvers on the soldiers themselves and on the citizens of north-central Louisiana who lived in the maneuver area. This study will also focus on how the Louisiana state government worked with the U.S. army to get the maneuvers
User\u27s Manual for Tardigrade Risk Assessment
Get PDFThis user-guide provides instructions for operating Tardigrade 1.1.3, a cybersecurity software for Nollysoft, LLC. This guide instructs users step-by-step on how to set security controls, risk assessments, and administrative maintenance. Tardigrade 1.1.3 is a Risk Assessment Enterprise that evaluates the risk level of corporations and offers solutions to any security gaps within an organization. Tardigrade 1.1.3 is a role-based software that operates through three modules, Cybersecurity Assessment, Internal Control, and Security Requirement Traceability Matrix
Remembering World War I in 2014: Films and TV Productions in Austria and a New Path of Visual Memory
Get PDFhttps://scholarworks.uno.edu/hlw/1004/thumbnail.jp
Analysis of temperature and salinity effects on growth and mortality of oysters (Crassostrea virginica) in Louisiana
Get PDFSalinity (S) and temperature (T) control every facet of the eastern oyster (Crassostrea virginica) life cycle, principally reproduction, development, growth, and mortality. Previous studies conducted in in the Breton Sound (BR) and Barataria (BA) estuaries have reported differences in growth and mortality rates between the basins. In the present study, environmental conditions were synchronized to compare growth and mortality rates between basins at similar combinations of T and S. Results indicate that when T and S are the same (synchronized), seasonal oyster growth and mortality rates differ between BR and BA. Seasonal analyses revealed that as salinities increased in both estuaries, growth rates generally increased, while mortality rates generally decreased. These findings suggest that basin-wide adaptations to local environmental conditions may exist
A Longitudinal Examination of the Association between Contextual Stress, Parenting, and School Readiness
Get PDFContextual stress has been associated with poor school readiness skills during early childhood. This study evaluated mechanisms by which parent’s exposure to poverty-related contextual stressors influence the acquisition of school readiness skills from child age 2 to 4 among 167 parent-child dyads. Parent report of contextual stress and observational measures of parenting quality were collected during the children’s 2-year-old assessment. Teacher reports and children’s scores on school readiness tasks were collected during the 4-year-old assessment. Two approaches were used to understand the process by which contextual stressors influences school readiness; the accumulation of stressors approach and the constellations of stressors approach. Using the accumulation of stressors approach, each indicator of contextual stress was identified as a stressor or non-stressor and the number of categories in which families experienced a stressor were summed. Results from separate structural equation models (SEM) indicated that the accumulation of stressors did not influence school readiness skills by way of positive parenting. The constellation of stressors approach considered how clusters of stressors may differentially impact children’s school readiness. Results of the Latent Class Analysis (LCA) revealed the presence of two risk profile groups that differed qualitatively, indicating that not all stressors are equal; the “low-stressor” group and the “multi-stressor” group. The multi-stressor group represented thirty-three percent of families (n= 55). When considering the influence of the multi-stressor group probability to each of the school readiness indicators, none of the path coefficients were statistically significant. Implications for research and intervention are discussed