Phoradendron wattii Krug & Urb.

https://thekeep.eiu.edu/herbarium_specimens_byname/20773/thumbnail.jp

Intimate opposition: Perceived closeness as a moderator of the impact of third-party opposition on romantic relationships [abstract]

Abstract only availableFaculty Mentor: Dr. Colleen Sinclair, PsychologyResearch has examined how third parties (e.g. parent-child relationships and peer relationships) affect the quality of romantic relationships. For instance, a pair of studies investigated the "Romeo & Juliet effect," to see whether parental disapproval of a child's romantic partner results in pushing the child closer to his/her love interest. A study by Driscoll & colleagues (1972) found that feelings of romantic love were intensified by parental disapproval. Yet, a more recent study by Sprecher & Felmlee (1992) found the complete opposite results, finding that romantic relationships without social support were likely to fail. Neither of these studies, however, examined how closeness with a disapproving friend or parent might moderate the effects of their disapproval. For example, if an adolescent did not feel close to his/her parent - as was the case in the story of Romeo and Juliet - s/he might be less likely to yield to his/her parent's opinion and might instead be driven to rebel against it. Consequently, we examined whether the impact of a disapproving party's opinion depends upon the closeness between the disapproving party and the adolescent in the romantic relationship. To examine the role of closeness, participants completed a survey asking about the degree of disapproval from friends and family, as well as degree of closeness to friend, family member and romantic partner. We found that degree of parental disapproval did negatively affect relationship closeness and love for partner, and that this effect was strengthened the closer the participant reported being to their parent

Enhancing Farm Profitability through Portfolio Analysis: The Case of Spatial Rice Variety Selection

This study applies portfolio theory to rice varietal selection decisions to find profit maximizing and risk minimizing outcomes. Results based on data from six counties in the Arkansas Delta for the period 1999–2006 suggest that sowing a portfolio of rice varieties could have increased profits from 3 to 26% (depending on the location) for rice producers in the Arkansas Delta. The major implication of this research is that data and statistical tools are available for rice producers to improve the choice of rice varieties to plant each year in specific locations. Specifically, there are large potential gains from combining varieties that are characterized by inverse yield responses to growing conditions such as drought, pest infestation, or the presence of a specific disease.optimal variety selection, portfolio analysis, rice, Agribusiness, Crop Production/Industries, Farm Management, Production Economics, Productivity Analysis, Risk and Uncertainty, G11, Q15, Q12,

Viola septentrionalis Greene

https://thekeep.eiu.edu/herbarium_specimens_byname/20265/thumbnail.jp

Photophysics, Molecular Reorientation in Solution and X-Ray Structure of a New Fluorescent Probe 1,7-Diazaperylene

A new fluorescent molecule 1,7-diazaperylene (DP) has been investigated by means of time-resolved and steady-state polarized fluorescence spectroscopy, as well as X-ray spectroscopy. Absorption and fluorescence spectra of DP in solution are similar to those of perylene. However, absorption and fluorescence spectra of 2,8-dimethoxy DP and 2,8-dipentyloxy DP in solution are red-shifted by ca. 55 nm relative to perylene. The fluorescence decay of DP is exponential with a lifetime of 5.1 ns in ethanol, 4.9 ns in glycerol and 4.3 ns in paraffin oil. The radiative lifetime in ethanol was calculated to be 6.3 ns for DP, 8.0 ns for 2,8-dimethoxy DP and 7.6 ns for 2,8-dipentyloxy DP. The calculated fluorescence quantum yields of 0.8 for DP and its alkoxy derivatives in ethanol, are in good agreement with those obtained from measurements. The calculated Förster radius is 37.2 ± 1 Å for DP and 41.9 ± 1 Å for its alkoxy derivatives in ethanol. Examining the S0 S1 transition, we obtain a limiting fluorescence anisotropy of r0 0.38 for DP and its alkoxy derivatives. The rotational rates of DP in paraffin oil and glycerol were compared to that of perylene. In paraffin oil both molecules show an almost identical biexponential decay of the fluorescence anisotropy, which is compatible with a rotational motion like an oblate ellipsoid. The fluorescence anisotropy is monoexponential for DP in glycerol, and DP appears to rotate like a spherical particle while perylene in glycerol appears to rotate like an oblate ellipsoid. Moreover, the rotational diffusion constant, corresponding to rotation about an axis in the aromatic plane (D), is the same for both DP and perylene in glycerol

Equisetum giganteum

Pteridophyte

Viola septentrionalis Greene

https://thekeep.eiu.edu/herbarium_specimens_byname/20265/thumbnail.jp