197,755 research outputs found
In-situ Mössbauer Spectroscopy with MIMOS II at Rio Tinto, Spain
No full textThe Rio Tinto, located in southwest Spain, exhibits a nearly constant, acidic pHvalue along its course. Due to the formation of sulfate minerals, Rio Tinto is considered a potential analogue site for sulfate-rich regions on Mars, in particular at the landing site of the Mars Exploration Rover Opportunity, where the ferric sulfate mineral jarosite was identified with Opportunity's Mössbauer spectrometer. Primary and secondary mineralogy was investigated in situ with portable Raman and Mössbauer spectrometers at four different Rio Tinto sampling sites. The two techniques analyse different sample portions due to their specific field of view and sampling depth and provide complementary mineralogical information
The Rothschild House business network in Spain as an example of entrepreneurial decision-taking and management structure.
No full textIn the period between 1835 and 1931 the Rothschild House established one of the most complex and influential business networks in Spanish economic history. This network controlled a wide range of activities, including financial services for the Spanish Government and the Bank of Spain, as well as the management of industrial, mining and railway firms. Instances of these firms are Rio Tinto Co., Société Minière et Metallurgique Peñarroya, MZA railway company and Deutsch & Cie, which was the main oil refining firm in Spain at the end of the 19th century.Spain 1835-1931, Rothschild, networks, Weisweiller, Bauer, foreign investments in Spain, railways, mining and refining companies, international raw material market, Public Finances, entrepreneurial function, agency problems, rent-seeking.
Myocardial viability independently influences left ventricular diastolic function in the early phase of acute myocardial infarction
No full textDr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
Metal biogeochemistry in the Tinto-Odiel rivers (southern Spain) and in the Gulf of Cadiz: a synthesis of the results of TOROS project
No full textpeer reviewedTOROS (Tinto-Odiel-River-Ocean Study) has been studying the biogeochemical processes which control metals and nutrients cycling in the mixing zone of the Tinto and Odiel rivers (SW Spain) and has established the fate of metals in the Gulf of Cadiz in relation to hydrodynamics and biological activity. The Tinto and Odiel rivers are small, with a combined mean discharge of 18 m(3)/s. They drain the largest sulphide mineralisation in the world. Predominantly, Zn-Cu-Pb mineralisation has been worked since 2500 yr BC. The estuarine zone includes both an extensive area of salt marsh and an intensively industrialised urban area. As a consequence of pyrite oxidation, the Tinto and Odiel rivers are strongly acidic (pH < 3) with extremely high and variable metal concentrations. Transition metals are poorly removed from the water column in the mixing zone. Moreover, drainage from large phosphogypsum waste deposits contributes to As, Hg, U and phosphate contamination of the estuary. The collapse of the tailing reservoir at los Frailes in 1998 had not impacted the chemistry of the coastal waters up to 6 months later. A large plume of metal-rich waters due to the Tinto arid Odiel discharges occurs along the coast of the Gulf of Cadiz. This plume affects seasonally the Atlantic inflow through the Strait of Gibraltar. The dispersion of the metal discharges has been simulated by injection of a tracer in the 3-D hydrodynamical model. Both model and field study clearly show the inflow of metal contaminated Spanish Shelf Water through the Strait of Gibraltar. (C) 2001 Elsevier Science Ltd. All rights reserved
Chinese resource security policies and the restructuring of the Asia-Pacific iron ore market
No full textThis paper reviews the restructuring of the Asia-Pacific iron ore market in the wake of the rise of the Chinese steel industry. Prior to the 2000s, this market was characterised by two key features-high firm-level concentration on both the producer and consumer sides, and price determination through annually negotiated benchmark pricing between Australian mining and Japanese steel firms. However, owing to rapid growth in the Chinese steel industry and its emergence as the region's principal iron ore consumer, the Asia-Pacific iron ore market has been dramatically restructured during the last decade. This process has been accelerated since 2005 by Chinese governmental resource security policies, which have sought to address current record high iron ore prices through the use of foreign investment to sponsor new market entrants and the formation of an import cartel amongst the Chinese steel firms. This paper evaluates how these policies have driven restructuring in the Asia-Pacific iron ore market, through an analysis of the growth of China's steel industry, Chinese resource security policies aimed at lowering iron ore import costs, and their effects upon the regional market's ownership structure and price determination mechanisms. It argues that while Chinese investment and cartelisation policies have catalysed significant changes to the ownership and pricing structures of the Asia-Pacific iron ore market, they have carried only mixed benefits for the Chinese steel industry's resource security
"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States" By M. Carey.
No full text"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States: containing bried sketches of the moral and political character of those states.
By M. Carey, member of the American philosophical, and of the American Antiquarian Society, and author of The Olive Branch, Cindiciae Hibernicae, essays on banking, on political economy, and on internal improvement.
To which are now added the English editor's comments on the subject; together with Important Advice to Emigrants, and Cautions Against Impositions Practiced in the Outports
A rare case of nasal osteoma in a dog: a case report
No full textA 35-month-old female German shepherd weighing 33.2 kg was referred to our department with a 10-month history of sneezing and left nasal swelling. On clinical examination, the dog showed deformity of the left nasal plane in the absence of any cutaneous lesions or nasal discharge, and presented with nasal snoring noises during both the inspiratory and expiratory phases. The patency of nasal cavities was evaluated using the cotton swab test, and was found to be preserved only on the right side. Endoscopic, radiographic and computed tomographic examination revealed an osteoproductive lesion that distorted the nasal, maxillar and frontal bones, completely occupying the left nasal cavity and frontal sinuses, resulting in destruction of the nasal septum and invasion of the contralateral nasal cavity. Five bioptic samples of the mass were collected from the cutaneous surface using a 9G Jamshidi bone marrow bioptic instrument. Histologically, the lesion consisted of a non-encapsulated, multilobulated mass composed of dense coalescing trabeculae of well-differentiated bone, which was lined by osteogenic cells. The morphology was suggestive of nasal osteoma. Due to the large size of the mass, evidenced by computed tomography, chronic systemic nonsteroidal anti-inflammatory treatment with carprofen was proposed instead of surgery. The description of this case is useful for veterinarians, who should consider osteoma as a possible differential diagnosis for nasal tumours
Multidisciplinary integrated field campaign to an acidic Martian Earth analogue with astrobiological interest: Rio Tinto
No full textRecently reported results from latest Mars Orbiters and Rovers missions are transforming our opinion about the red planet. That dry and inhospitable planet reported in the past is becoming a wetter planet with high probabilities of water existence in the past. Nowadays, some results seem to indicate the presence of water beneath the Mars surface. But also mineralogy studies by NASA Opportunity Rover report iron oxides and hydroxides precipitates on Endurance Crater. Sedimentary deposits have been identified at Meridiani Planum. These deposits must have generated in a dune aqueous acidic and oxidizing environment. Similarities appear when we study Rio Tinto, and acidic river under the control of iron. The discovery of extremophiles on Earth widened the window of possibilities for life to develop in the Universe, and as a consequence on Mars and other planetary bodies with astrobiological interest. The compilation of data produced by the ongoing missions offers an interested view for life possibilities to exist: signs of an early wet Mars and rather recent volcanic activity as well as ground morphological characteristics that seem to be promoted by liquid water. The discovery of important accumulations of sulfates and the existence of iron minerals such as jarosite in rocks of sedimentary origin has allowed specific terrestrial models to come into focus. Río Tinto (Southwestern Spain, Iberian Pyritic Belt) is an extreme acidic environment, product of the chemolithotrophic activity of micro-organisms that thrive in the massive pyrite-rich deposits of the Iberian Pyritic Belt. Some particular protective environments should house the organic molecules and bacterial life forms in harsh environments such as Mars surface supporting microniches inside precipitated minerals or inside rocks. Terrestrial analogues could help us to afford the comprehension of habitability (on other planetary bodies). We are reporting here the multidisciplinary study of some endolithic niches inside salt deposits used by phototrophs for taking advantage of sheltering particular light wavelengths. These acidic salts deposits located in Río Tinto shelter life forms that are difficult to visualize by eye. This interdisciplinary field analogue campaign was conducted in the framework of the CAREX FP7 EC programme.Remote SensingAerospace Engineerin
Implementing CSR through partnerships: Understanding the selection, design and institutionalisation of nonprofit-business partnerships
No full textPartnerships between businesses and nonprofit organisations are an increasingly prominent element of corporate social responsibility implementation. The paper is based on two in depth partnership case studies (Earthwatch-Rio Tinto and Prince’s Trust-Royal Bank of Scotland) that move beyond a simple stage model to reveal the deeper level micro-processes in the selection, design and institutionalisation of business-NGO partnerships. The suggested practice-tested model is followed by a discussion that highlights management issues within partnership implementation and a practical Partnership Test to assist managers in testing both the accountability and level of institutionalisation of the relationship in order to address any possible skill gaps. Understanding how CSR partnerships are implemented in practice contributes to the broader CSR and partnership literatures a context specific level of detail in a systematic way that allows for transferable learning in both theory and practice
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