3,062 research outputs found
Alien Registration- Harris, Hazel H. (Jackman, Somerset County)
https://digitalmaine.com/alien_docs/7085/thumbnail.jp
Predicting the stability of atom-like and molecule-like unit-charge Coulomb three-particle systems
Non-relativistic quantum chemical calculations of the particle mass, m ± 2 , corresponding to the dissociation threshold in a range of Coulomb three-particle systems of the form {m ± 1 m ± 2 m ∓ 3 } , are performed variationally using a series solution method with a Laguerre-based wavefunction. These masses are used to calculate an accurate stability boundary, i.e., the line that separates the stability domain from the instability domains, in a reciprocal mass fraction ternary diagram. This result is compared to a lower bound to the stability domain derived from symmetric systems and reveals the importance of the asymmetric (mass-symmetry breaking) terms in the Hamiltonian at dissociation. A functional fit to the stability boundary data provides a simple analytical expression for calculating the minimum mass of a third particle required for stable binding to a two-particle system, i.e., for predicting the bound state stability of any unit-charge three-particle system
Ammonia uptake and release in the MnX<sub>2</sub>–NH<sub>3</sub> (X = Cl, Br) systems and structure of the Mn(NH<sub>3</sub>)nX<sub>2</sub> (n = 6, 2) ammines
Hexa-ammine complexes, Mn(NH<sub>3</sub>)<sub>6</sub>X<sub>2</sub> (X = Cl, Br), have been synthesized by ammoniation of the corresponding transition metal halide and characterized by Powder X-ray diffraction (PXRD) and Raman spectroscopy. The hexa-ammine complexes are isostructural (Cubic,Fm-3m, Z = 4; a = 10.2742(6) Å and 10.527(1) Å for X = Cl, Br respectively). Temperature programmed desorption (TPD) demonstrated that ammonia release from Mn(NH<sub>3</sub>)<sub>6</sub>X<sub>2</sub> complexes occurred in three stages corresponding to the release of 4, 1 and 1 NH<sub>3</sub> equivalents respectively. The chloride and bromide both exhibit a deammoniation onset temperature below 323 K. The di-ammoniates from the first desorption step were isolated during TPD measurements and their crystal structures determined by Rietveld refinement against PXRD data (X = Cl: orthorhombicCmmm, a = 8.1991(9) Å, b = 8.2498(7) Å, c = 3.8212(4) Å, Z = 2; X = Br: orthorhombic Pbam, a = 6.0109(5) Å, b = 12.022(1) Å, c = 4.0230(2) Å, Z= 2)
Review of "The Blood-Cerebrospinal Fluid Barrier" by Wei Zheng and Adam Chodobski (editors)
This multi-author volume on the blood-cerebrospinal fluid barrier summarizes past and current research in the areas of choroid plexus and cerebrospinal fluid in health and disease
A Dialogue of Forms: The Display of Thinking in George Eliot’s ‘Poetry and Prose, From the Notebook of an Eccentric’ and Impressions of Theophrastus Such
This article rereads George Eliot's Impressions of Theophrastus Such in the light of her early series of journalism “Poetry and Prose, from the Notebook of an Eccentric.” Rather than viewing these texts as experimental deviations, this article casts these texts as part of larger patterns evident in Eliot's canon as a whole. Building on recent studies on Eliot and Victorian perfectionism, it argues that Eliot united an appreciation for complex and diverse configurations of form with her interest in individual development and the extension of sympathy. In these texts, we can see a reflection of Eliot's interest in the attempt to capture and display human thinking processes in order to advance her project of extending the sympathies of her readership. It examines Eliot's organicist views on form and consciousness and suggests that these are key to making sense of the apparently “aberrant” nature of these texts. Eliot, influenced by Ludwig Feuerbach, held to the idea that just as the highest form of organicism was the most complex, so also was the highest form of art the most structurally varied and intricate. From this viewpoint, the texts are eminently successful. Moreover, they point the way to achieving a fuller understanding of the apparent problematics of form that have concerned critics in regard to Eliot's better-known fictional works since their original publication
Zebrafish Brain Ventricle Injection
Proper brain ventricle formation during embryonic brain development is required for normal brain function. Brain ventricles are the highly conserved cavities within the brain that are filled with cerebrospinal fluid. In zebrafish, after neural tube formation, the neuroepithelium undergoes a series of constrictions and folds while it fills with fluid resulting in brain ventricle formation. In order to understand the process of ventricle formation, and the neuroepithelial shape changes that occur at the same time, we needed a way to visualize the ventricle space in comparison to the brain tissue. However, the nature of transparent zebrafish embryos makes it difficult to differentiate the tissue from the ventricle space. Therefore, we developed a brain ventricle injection technique where the ventricle space is filled with a fluorescent dye and imaged by brightfield and fluorescent microscopy. The brightfield and the fluorescent images are then processed and superimposed in Photoshop. This technique allows for visualization of the ventricle space with the fluorescent dye, in comparison to the shape of the neuroepithelium in the brightfield image. Brain ventricle injection in zebrafish can be employed from 18 hours post fertilization through early larval stages. We have used this technique extensively in our studies of brain ventricle formation and morphogenesis as well as in characterizing brain morphogenesis mutants (1-3)
You\u27re The Girl For Me
https://digitalcommons.library.umaine.edu/mmb-vp/4843/thumbnail.jp
AN EXPLORATION OF SOCIAL MEDIA IN EXTREME EVENTS: RUMOR THEORY AND TWITTER DURING THE HAITI EARTHQUAKE 2010
Due to its rapid speed of information spread, wide user bases, and extreme mobility, Twitter is drawing attention as a potential emergency reporting tool under extreme events. However, at the same time, Twitter is sometimes despised as a citizen based non-professional social medium for propagating misinformation, rumors, and, in extreme case, propaganda. This study explores the working dynamics of the rumor mill by analyzing Twitter data of the Haiti Earthquake in 2010. For this analysis, two key variables of anxiety and informational uncertainty are derived from rumor theory, and their interactive dynamics are measured by both quantitative and qualitative methods. Our research finds that information with credible sources contribute to suppress the level of anxiety in Twitter community, which leads to rumor control and high information quality
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