Representing Early Black Film Artifacts as Material Evidence in Digital Contexts

The study of "race movies," the early motion pictures produced for black audiences in the first decades of the 20th century, presents an ideal humanities context for framing important questions bearing on the digital representation of film artifacts as material evidence: How must we reevaluate and amend current best practices for digitization of motion picture film which by design omit or obscure physical attributes of the original artifact?; And how might this representation of film as a material object offer a conceptual bridge for integrating audiovisual media within a wider network of related visual and textual documentation? The Black Film Center/Archive (BFC/A) at Indiana University proposes in this Level I Digital Humanities Start-Up Grant to explore these questions by convening an interdisciplinary group of scholars, moving image archivists, and technology specialists in digital humanities for a two-day conference and workshop to be held in November 2013

Alterations in juvenile diploid and triploid African catfish skin gelatin yield and amino acid composition: effects of chlorpyrifos and butachlor exposures

Skin is a major by-product of the fisheries and aquaculture industries and is a valuable source of gelatin. This study examined the effect of triploidization on gelatin yield and proximate composition of the skin of African catfish (Clarias gariepinus). We further investigated the effects of two commonly used pesticides , chlorpyrifos (CPF) and butachlor (BUC), on the skin gelatin yield and amino acid composition in juvenile full-sibling diploid and triploid African catfish. In two separate experiments, diploid and triploid C. gariepinus were exposed for 21 days to graded CPF [mean measured: 10, 16, or 31 mg/L] or BUC concentrations [Mean measured: 22, 44, or 60 mg/L]. No differences in skin gelatin yield, amino acid or proximate compositions were observed between diploid and triploid control groups. None of the pesticide treatments affected the measured parameters in diploid fish. In triploids, however, gelatin yield was affected by CPF treatments while amino acid composition remained unchanged. Butachlor treatments did not alter any of the measured variables in triploid fish. To our knowledge, this study is the first to investigate changes in the skin gelatin yield and amino acid composition in any animal as a response to polyploidization and/or contaminant exposure

Introduction: John Lucaites

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Workshop Closing Session: Mike Mashon

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Workshop Session Two: John A. Walsh

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Keynote Address: Shola Lynch

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Workshop Session One: Reto Kromer

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Origin of Brines, Salts and Carbonate from Shales of the Marcellus Formation: Evidence from Geochemical and Sr Isotope Study of Sequentially Extracted Fluids

Fluids co-produced with methane from hydraulically fractured organic-rich shales of the Marcellus Formation (USA) are characterized by high total dissolved solids (TDS), including elevated levels of Ba, Sr and Br. To investigate the source and geologic history of these high-TDS fluids and their dissolved constituents, we carried out a series of sequential extraction experiments on dry-drilled cuttings extracted within, below and above the Marcellus Shale from a well in Tioga County, New York State. The experiments were designed to extract (1) water soluble components, (2) exchangeable cations, (3) carbonate minerals, and (4) hydrochloric acid-soluble constituents. The geochemistry of the resultant leachates highlights the different geochemical reservoirs for extractable elements within the shale; notably, Na and Br were largely water-soluble, while Ba was extracted primarily from exchangeable sites, and Ca and Sr were found both in exchangeable sites and carbonate. Strontium isotope ratios measured on the leachates indicate that each of the element reservoirs has a distinct value. Measured Sr-87/Sr-86 ratios in the water soluble component are similar to those of Marcellus produced water, while the ion exchange reservoir yields lower ratios, and carbonate Sr is lower still, approaching Devonian-Silurian seawater values. Despite the isotopic similarity of water leachates and produced water, the total water chemistry argues against generation of produced water by interaction of hydraulic fracturing fluid with dry shale. The high-TDS produced water is most likely trapped formation water (within and/or adjacent to the shale) that is released by hydraulic fracturing. The formation water was affected by multiple processes, possibly including basin scale, tectonically-driven fluid flow. Significant chemical and isotopic differences between Marcellus Shale produced water and overlying Upper Devonian/Lower Mississippian produced waters suggests a hydrologic barrier has been maintained in parts of the Appalachian Basin since the late Paleozoic. (C) 2015 Elsevier Ltd. All rights reserved

Workshop Session One: Andy Uhrich

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The Case of the Race Movie Circuit: Question and Answer Session

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