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Final Report - Phase II - Biogeochemistry of Uranium Under Reducing and Re-oxidizing Conditions: An Integrated Laboratory and Field Study
Get PDFOur understanding of subsurface microbiology is hindered by the inaccessibility of this environment, particularly when the hydrogeologic medium is contaminated with toxic substances. Past research in our labs indicated that the composition of the growth medium (e.g., bicarbonate complexation of U(VI)) and the underlying mineral phase (e.g., hematite) significantly affects the rate and extent of U(VI) reduction and immobilization through a variety of effects. Our research was aimed at elucidating those effects to a much greater extent, while exploring the potential for U(IV) reoxidation and subsequent re-mobilization, which also appears to depend on the mineral phases present in the system. The project reported on here was an extension (20,575) of the prior (much larger) project. This report is focused only on the work completed during the extension period. Further information on the larger impacts of our research, including 28 publications, can be found in the final report for the following projects: 1) Biogeochemistry of Uranium Under Reducing and Re-oxidizing Conditions: An Integrated Laboratory and Field Study Grant # DE-FG03-01ER63270, and 2) Acceptable Endpoints for Metals and Radionuclides: Quantifying the Stability of Uranium and Lead Immobilized Under Sulfate Reducing Conditions Grant # DE-FG03-98ER62630/A001 In this Phase II project, the toxic effects of uranium(VI) were studied using Desulfovibrio desulfuricans G20 in a medium containing bicarbonate or 1, 4-piperazinediethane sulfonic acid disodium salt monohydrate (PIPES) buffer (each at 30 mM, pH 7). The toxicity of uranium(VI) was dependent on the medium buffer and was observed in terms of longer lag times and in some cases, no measurable growth. The minimum inhibiting concentration (MIC) was 140 M U(VI) in PIPES buffered medium. This is 36 times lower than previously reported for D. desulfuricans. These results suggest that U(VI) toxicity and the detoxification mechanisms of G20 depend greatly on the chemical forms of U(VI) present and the buffer present in a system. Phase II of this project was supported at a cost of 20,575 with most funds expended to support Rajesh Sani salary and benefits. Results have been published in a peer reviewed journal article
Mathematical Modeling of Biofilms
No full textA continuum approach to mathematical modeling of multispecies biofilm formation and growth is presented. The equations governing the biological process are derived from mass balance principles in the general 3D situation. The 1D equations are inferred as special cases. A system of n nonlinear hyperbolic partial differential equations (PDEs) for the n bacterial species forming the biofilm, m semilinear parabolic (or elliptic) PDEs for the m substrates present in the biofilm, and an ordinary differential equation (ODE) for the motion of the biofilm boundary are obtained. In addition, a further system of parabolic PDEs is added in some situations, such as the invasion of new bacterial species and colonization into an already constituted biofilm. All equations mentioned are mutually connected and must be solved simultaneously in a domain that is a further unknown within the mathematical problem. Transforming the problem to characteristic coordinates yields positive answers about model consistency (uniqueness, existence, positiveness of solutions). The invasion problem is illustrated with some simulations based on the method of characteristics. The biofilm-reactor model is also discussed
Religious Congregations, Education and School in Italy in the Nineteenth Century
Get PDFThis article traces the origins and development of about 140 new religious male and female congregations, established in Italy during the Nineteenth century. Starting from the Restoration period, the article frames the actions and choices of the new religious congregations with reference to the new scenarios produced by the revolutionary experience and by the changes introduced in ecclesiastical legislation and in the relations between State and Church during the Napoleonic era. At the same time, it deals with the unusual challenges the Church had to face due to both the secularization of mentality and customs and the increased educational needs and welfare of the post-revolutionary period. The author analyses some characteristics of these new religious institutions, most of which chose as privileged —and sometimes exclusive— activity of their apostolate the assistance (of poor and sick people, and of abandoned children and youth), the catechesis and animation of religious life in the parishes and, above all, the education of youth of both sexes and of different social classes. Firstly, the author describes the aspect related to the general adoption of the structure of religious congregations, which provides unequivocal evidence of the prevalence, also on the female side, of the traditional monastic model, of a vocation to religious life understood essentially as an active life devoted to charity, a synthesis between action and prayer, a commitment in the world through the assistance of others. The author’s reconstruction also shows how the idea of charity promoted by the new religious congregations was understood not simply as a commitment to provide assistance, but also, and above all, as an educational responsibility. Indeed, the new religious congregations considered education, school and parish catechesis as the most effective tools for Christians’ education. At the same time, school and education were also seen as the most direct and useful tool for relieving poverty and overcoming the marginalisation of the poorer classes and as the most effective tool for facilitating the successful integration of young working class men and women into society
The Education of Female élites in Nineteenth Century Papal Rome. Innovative Contributions of the Society of the Sacred Heart of Madeleine-Sophie Barat
No full textAfter a brief description of the evolution of
educational institutions in the first half of the nineteenth
century Papal Rome, the Author explores the
role played –on this side– of the new female religious
institutions arose after the French Revolution. The article,
on the basis on a rich archival and printed documentation,
analyzes the innovative work of the teaching
and religious Congregation of the Sacred Heart,
founded in Paris in 1800 by Madeleine-Sophie Barat,
whose “colleges for young ladies” of bourgeois and aristocracy
offered to the young women of upper classes
of papal capital a cultural and religious education, that
was much more rich and elaborate than that provided
by female traditional boarding schools
«A concentrate of Italic defects». The figure of the school inspector in the literary production in a united Italy (1865-1962)
No full textThrough the examination of various complex literary works (novels, short stories, news, etc.), which were printed between 1865 and 1962, the author has examined the characteristics and the evolution recorded by the figure of the school inspector in the storytelling of a united Italy, especially focusing on the remarkable contrast, which can be recorded in this phase, between the real centrality attributed by school legislation to this figure of ministerial official for the better functioning of Italian schools and the universally negative connotation attributed to the figure of the school inspector in literature
The contribution of «History of Education & Children’s Literature» (HECL) to a recent international workshop on the scientific journals of history of education
No full textThe article reproduces the text of the report presented at the Workshop on the journals of History of Education, held on the 26th of February 2015, as part of the Symposium of History of Education of Valladolid (Spain) and organized by the journal «Espacio, Tiempo y Educación» on the topic: La Pedagogía ante la Muerte. Reflexiones e interpretaciones en perspectivas histórica y filosófica. In it, the author analyses a number of issues related to the role played by scientific journals in the strengthening and internationalization of the research in the field of history of education. A particular importance, among the various debated topics, was given to the models of editorial management of the journals and their effects on the forms of scientific production, to the role of the social networks in the promotion of these same journals, to the procedures for openaccess and free-access publication, to the indexing in the major international databases, such as ISI Web of Science by Thomson Reuters or SCOPUS by Elsevier, and finally to the editorial choice to focus on English monolingualism or to enhance multilingualism, publishing articles in different languages
Camilla Del Soldato
No full textThe headword explains the biography and the contribution of the author Camilla Del Soldato to the children's literatur
Biogeochemical cycling of toxic metals in Lake Coeur d'Alene sediments
Get PDFThesis (M.S.), Chemical Engineering, Washington State Universit
Ada Cagli Della Pergola
No full textThe headword explains the biography and the contribution of the author Ada Cagli Della Pergola to the children's literatur
Fernando Palazzi
No full textThe headword explains the biography and the contribution of the author Fernando Palazzi to the children's literatur
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