13,035 research outputs found
MU student Richard Shumate
No full textMU student Richard Shumate, b&w.https://mds.marshall.edu/parthenon_photo_morgue/1398/thumbnail.jp
Richard Dardinger, #50, 1970 MU Football team
No full textRichard Dardinger, #50, 1970 MU Football team, b&w. Dardinger died in the 1970 plane crash. He was the center. 75 members, coaches, and fans were killed in November 1970 plane crash.https://mds.marshall.edu/mu_plane_crash/1027/thumbnail.jp
Richard Dardinger, #50, 1970 MU Football team
No full textRichard Dardinger, #50, 1970 MU Football team, b&w. Dardinger died in the 1970 plane crash. He was the center. 75 members, coaches, and fans were killed in November 1970 plane crash.https://mds.marshall.edu/mu_plane_crash/1028/thumbnail.jp
Two-Electron Redox Energetics in Ligand-Bridged Dinuclear Molybdenum and Tungsten Complexes
No full textElectron-transfer energetics of bridged dinuclear compounds of the form [(CO)(4)M(mu-L)](2)(0/1-/2-) (M = Mo, W; L = PPh(2)(-), SPh(-)) were explored using density functional theory coupled to a continuum solvation model. The experimentally observed redox potential inversion, a situation where the second of two electron transfers is more thermodynamically favorable than the first, was reproduced within this model. This nonclassical energy ordering is a prerequisite for the apparent transfer of two electrons at one potential, as observed in many biologically and technologically important systems. We pinpoint the origin of this phenomenon to be an unusually unfavorable electrostatic repulsion for the first electron transfer due to the redox noninnocent behavior of the bridging ligands. The extent of redox noninnocence is explained in terms of an orbital energy resonance between the metal-carbonyl and bridging ligand fragments, leading to a general mechanism by which potential inversion could be controlled in diamond-core dinuclear systems
Supersolvability and Freeness for ψ-Graphical Arrangements
No full textLet G be a simple graph on the vertex set {v[subscript 1],…,v[subscript n]} with edge set E. Let K be a field. The graphical arrangement A[subscript G] in K[superscript n] is the arrangement x[subscript i]−x[subscript j]=0,v[subscript i]v[subscript j] ∈ E. An arrangement A is supersolvable if the intersection lattice L(c(A)) of the cone c(A) contains a maximal chain of modular elements. The second author has shown that a graphical arrangement A[subscript G] is supersolvable if and only if G is a chordal graph. He later considered a generalization of graphical arrangements which are called ψ-graphical arrangements. He conjectured a characterization of the supersolvability and freeness (in the sense of Terao) of a ψ-graphical arrangement. We provide a proof of the first conjecture and state some conditions on free ψ-graphical arrangements.China Scholarship CouncilNational Science Foundation (U.S.) (Grant DMS-1068625
Richard A. Rick Lech, #20, 1970 MU Football team
No full textRichard A. Rick Lech, #20,1970 MU Football team, b&w. Lech died in the 1970 plane crash. Defensive player. 75 members, coaches, and fans were killed in November 1970 plane crash.https://mds.marshall.edu/mu_plane_crash/1053/thumbnail.jp
Richard A. Rick Lech, #20, 1970 MU Football team
No full textRichard A. Rick Lech, #20,1970 MU Football team, b&w. Lech died in the 1970 plane crash. Defensive player. 75 members, coaches, and fans were killed in November 1970 plane crash.https://mds.marshall.edu/mu_plane_crash/1054/thumbnail.jp
The Development and Psychometric Analysis of the MU- Fertility Knowledge Assessment Scale
No full textYoung women between the ages of 18 to 24 experience disproportionally high rates of negative sexual and reproductive health outcomes. Inadequate and inaccurate fertility knowledge can hinder a young woman’s self-care abilities in managing her sexual and reproductive health. There is no validated instrument to assess young women’s fertility knowledge. The primary purpose of this study is to develop and evaluate the psychometric properties of the MU-fertility knowledge assessment scale (MU-FKAS) for young women. The secondary purpose is to explore the relationships among young women’s individual and contextual factors, self-perceived fertility knowledge, actual fertility knowledge, and fertility health risks. A three-phase, multiple method design was used for the study. The MU-FKAS contains 26 items measuring knowledge of female fertility changes within the menstrual cycle and throughout the lifecycle, and the impact of lifestyle factors and female age on female fertility and conception. The Kuder- Richardson 20 (KR20) coefficient was .74 indicating acceptable internal consistency. Known group comparison between young women who used fertility awareness based method (FABM) vs. non-FABM users showed a significant difference in their fertility knowledge level supporting its construct validity. Exploratory factor analysis supported a two-factor structure. Item analysis provided evidence for refinement of individual items. The sample consisted of 342 young women between the ages of 18 to 24 (M= 21.87; SD =1.88). They were primarily White and heterosexual. Young women’s actual fertility knowledge ranged from 27 to 100 (M=78.04, SD= 14.36). Their self-reported fertility risk factors spanned from 0 to 12. A significant regression equation was found (F (8,331) =6.053, p \u3c .0001) with an R2 of .13. Using a FABM, self-perceived fertility knowledge, and actual fertility knowledge were statistically significant in predicting young women’s fertility health risks. Young women’s age, education level, or pregnancy experience were not significant in predicting their fertility health risks. The MU-FKAS demonstrated acceptable validity and reliability as a newly developed instrument. The significant relationships between young women’s fertility knowledge and their fertility health risks highlighted the importance of assessing and teaching young women about their fertility as an important component of their preconception care
Why does cyanide pretend to be a weak field ligand in [Cr(CN)(5)](3-)?
No full textChemical reasoning based on ligand-field theory suggests that homoleptic cyano complexes should exhibit low-spin configurations, particularly when the coordination sphere is nearly saturated. Recently, the well-known chromium hexacyano complex anion [Cr(CN)(6)](4-) was shown to lose cyanide to afford [Cr(CN)(5)](3-) in the absence of coordinating cations. Furthermore, (NEt4)(3)[Cr(CN)(5)] was found to be in a high-spin (S = 2) ground state, which challenges the common notion that cyanide is a strong field ligand and should always enforce low-spin configurations. Using density functional theory coupled to a continuum solvation model, we examined both the instability of the hexacyanochromate(II) anion and the relative energies of the different spin states of the pentacyanochromate(II) anion. By making direct comparisons to the analogous Fell complex, we found that cyanide electronically behaves as a strong-field ligand for both metals because the orbital interaction is energetically more favorable in the low-spin configuration than in the corresponding high-spin configuration. The Coulombic repulsion between the anionic cyanide ligands, however, dominates the overall energetics and ultimately gives preference to the high-spin complex, where the ligand-ligand separation is larger. Our calculations highlight that for a quantitative understanding of spin-state energetic ordering in a transition metal complex, ligand-ligand electrostatic interactions must be taken into account in. addition to classical ligand-field arguments based on M-L orbital interaction energies
Social trauma and the mu-opioid system in depression
No full textThe overarching thesis under investigation is that the endogenous opioid system plays a key role in depression subsequent to traumatic childhood social experiences. This is suggested by the fact that animal work indicates that mu-opioids robustly mediate separation-distress, and that early social stressors lead to long term dysregulation in key related circuitries and neuroanatomical structures
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