135 research outputs found
Theorising modernity: reflexivity, environment and identity in giddens social theory/ Martin OBrien; Sue Penna; Colin Hay (edt)
No full textxi, 226 ahl.; 24 cm
Theorising modernity: reflexivity, environment and identity in giddens social theory/ Martin OBrien; Sue Penna; Colin Hay (edt)
No full textxi, 226 ahl.; 24 cm
Theorising modernity: reflexivity, environment and identity in giddens social theory/ Martin OBrien; Sue Penna; Colin Hay (edt)
No full textxi, 226 ahl.; 24 cm
Surveying the metabolic versatility of biofilm-forming Epsilonproteobacteria: a study into developing ecosystems at extreme environments
No full textAt deep-sea hydrothermal vents, mixing of reduced, super-heated, hydrothermal fluids with cold, oxygenated, seawater creates steep temperature and chemical gradients that support chemosynthetic primary production and rich communities of invertebrates. In 2006, an eruption occurred on East Pacific Rise at 9° 50’N, 104° 17’W. Direct observations of the post-eruptive diffuse flow vents clearly indicated that the earliest colonizers were microbial biofilms. A series of cruises in 2006-07 allowed us to monitor the recovery of the ecosystem. The main objectives of this dissertation are to assess the taxonomic and functional diversity of chemosynthetic bacteria following the eruption, and to correlate it to macrofaunal colonization. To this end, I investigated several microbial biofilms that developed at the bottom of the ocean during exposure to different temperature, redox and biological regimes. Furthermore, I selected pure cultures of vent bacteria representative of these biofilms and designed experiments to investigate their expression of diagnostic genes involved in carbon fixation and respiration. Finally, I used the information obtained from the pure cultures and from metatranscriptomic studies of the vent biofilms to design experiments for the detection of gene transcripts in chemosynthetic microbial biofilm communities collected from deep-sea hydrothermal vents, and to interpret the results. My data showed that the biofilm communities that were exposed to active venting were substantially different from the ones that formed at control sites, and that vent invertebrates could only be detected at the former sites. Furthermore, I found that various members of the Epsilonproteobacteria dominated the chemosynthetic biofilm communities, and that these bacteria fixed carbon dioxide in-situ via the reverse tricarboxylic acid (rTCA) cycle and that they expressed different terminal reductases in response to variable temperature and redox conditions. I demonstrated for the first time that different respiratory pathways (e.g., nitrate reduction, sulfur oxidation/reduction, microaerobic respiration) are expressed simultaneously in chemosynthetic biofilms. In turn, these results imply that the extremely dynamic conditions found at diffuse flow vents, where reduced hydrothermal fluids mix with oxic seawater, provide the biofilm bacteria with a diverse “metabolic menu” in the form of different redox couples that they can use to conserve energy.Ph. D.Includes bibliographical referencesby Charles Edward O'Brie
What is your diagnosis? Radiographic diagnosis - Soft-tissue opacity containing numerous gas pockets in the right cranioventral abdominal region
No full textPT: J; CR: KONDE LJ, 1989, VET RADIOL, V30, P41 NEATH PJ, 1997, J SMALL ANIM PRACT, V38, P387 OBRIEN TR, 1978, RADIOGRAPHIC DIAGNOS, P376 SAUNDERS HM, 1998, VET RADIOL ULTRASOUN, V39, P349 STICKLE RL, 1989, J AM VET MED ASSOC, V194, P103; NR: 5; TC: 0; J9: J AMER VET MED ASSN; PG: 2; GA: 537CASource type: Electronic(1
Soledad O'Brien Presents Black in America Tour 2015
No full text#PurdueTalks
#IAmTheConversation
SOLEDAD O’BRIEN
PRESENTS
BLACK IN AMERICA
Tour 2015
SOLEDAD
OBRIEN
Critically acclaimed journalist, educator and mentor
DR. JULIANNE MALVEAUX
Labor economist and noted author and commentator
CHUCK D
Founder of legendary group Public Enemy
DR. VENETRIA PATTON
Purdue professor of English, director of African American Studies and Research Center
TUESDAY, FEB. 10 • 6-7:30 P.M. • ELLIOTT HALL OF MUSIC
PURDUE UNIVERSITY
DIVISION OF DIVERSITY AND INCLUSION
EA/EOU
[photographic portraits]
A Multi-hazard Risk Assessment Methodology, Stress Test Framework and Decision Support Tool for Transport Infrastructure Networks
No full textAbstractNatural hazards can cause serious disruption to societies and their transport infrastructure networks. The impact of extreme hazard events is largely dependent on the resilience of societies and their networks. The INFRARISK project is developing a reliable stress test framework for critical European transport infrastructure to analyse the response of networks to extreme hazard events. The project considers the spatio-temporal processes associated with multi-hazard and cascading extreme events (e.g. earthquakes, floods, landslides) and their impacts on road and rail transport infrastructure networks. As part of the project, an operational framework is being developed using an online INFRARISK Decision Support Tool (IDST) to advance decision making approaches, leading to better protection of existing transport infrastructure. The framework will enable the next generation of European infrastructure managers to analyse the risk to critical road and rail infrastructure networks due to extreme natural hazard events. To demonstrate the overarching risk assessment methodology developed in the project, the methodology is demonstrated for two case studies, which comprise portions of the European TEN-T network; a road network in the region of Bologna, Italy and a rail network extending from Rijeka to Zagreb in Croatia. This paper provides an overview of the INFRARISK multi-hazard risk assessment methodology and a brief introduction to the case studies, as the project is currently ongoing. INFRARISK is funded by the European Commission's FP7 programme, Grant Agreement No. 603960. Further information can be found at www.infrarisk-fp7.eu
Australian Proterozoic high-temperature low-pressure metamorphism in the conductive limit
No full textAbstract
High-temperature, low-pressure (HTLP) metamorphism often reflects transient advection of heat due to magma ascent. However, the origin of HTLP metamorphism in a number of Australian Proterozoic terranes remains contentious either because of the deficiency of magmatic bodies in the terranes, or because the long time delay (>100 Ma) between magmatism and metamorphism precludes heating by existing magmatic bodies. Furthermore, a number of Australian Proterozoic HTLP terranes (such as the Reynolds Range in central Australia) show evidence of an extended history (
c.
30 Ma) of HTLP mineral growth suggesting metamorphism during a thermal regime dominated by conduction at lithospheric length scales. Australian Proterozoic metamorphic terranes are characterized by both elevated modern-day heat flows (averaging
c.
85 mW m
−2
) and granitic gneisses with anomalously high heat production rates (commonly >5–10 μW m
−3
). We show that the conditions required for HTLP metamorphism may result from conduction if the crustal heat production responsible for modern-day heat flows is concentrated at mid-crustal levels (15–20 km). Importantly, for low-intermediate mantle heat fluxes (10–20 mW m
−2
) and moderate synmetamorphic crustal thicknesses (
c.
45 km), the conductive geotherms attendant with such HTLP metamorphism do not necessarily lead to significant melting of a refractory lower crust. Importantly, the thermal regimes are very sensitive to the depths at which crustal heat production is localized. The strong dependence of the resulting geotherms on the depth of the heat-producing layer has the important consequence that only minor burial may be required to induce HTLP metamorphism, while only minor erosion (
c.
5 km) is necessary to terminate the event.
</jats:p
Aileen McHarg, ‘Unity and Diversity in the United Kingdom's Territorial Constitution’
No full textIn this chapter, Chris McCorkindale assesses the significance of Aileen McHarg's chapter ‘Unity and Diversity in the United Kingdom's Territorial Constitution’. After first exploring the biographical influences on McHarg's thought, drawing on an interview with the author, McCorkindale explores divergence within the UK constitution, exacerbated and challenged by Brexit, and the urgent need – highlighted by McHarg's chapter – for a more holistic and sophisticated approach to the constitutional relationship between the devolved jurisdictions and the centre
- …
