Sample records for blanca faskin ranch
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International Nuclear Information System (INIS)
LeMone, D. V.; Dodge, R.; Xie, H.; Langford, R. P.; Keller, G. R.
2002-01-01
Remote sensing images provide useful physical information, revealing such features as geological structure, vegetation, drainage patterns, and variations in consolidated and unconsolidated lithologies. That technology has been applied to the failed Sierra Blanca (Faskin Ranch) shallow burial low-level radioactive waste disposal site selected by the Texas Low-Level Radioactive Waste Disposal Authority. It has been re-examined using data from LANDSAT satellite series. The comparison of the earlier LANDSAT V (5/20/86) (30-m resolution) with the later new, higher resolution ETM imagery (10/23/99) LANDSAT VII data (15-m resolution) clearly shows the superiority of the LANDSAT VII data. The search for surficial indications of evidence of fatal flaws at the Sierra Blanca site utilizing was not successful, as it had been in the case of the earlier remote sensing analysis of the failed Fort Hancock site utilizing LANDSAT V data. The authors conclude that the tectonic activity at the Sierra Blanca site is much less recent and active than in the previously studied Fort Hancock site. The Sierra Blanca site failed primarily on the further needed documentation concerning a subsurface fault underneath the site and environmental justice issues. The presence of this fault was not revealed using the newer LANDSAT VII data. Despite this fact, it must be remembered that remote sensing provides baseline documentation for determining future physical and financial remediation responsibilities. On the basis of the two sites examined by LANDSAT remote sensing imaging, it is concluded that it is an essential, cost-effective tool that should be utilized not only in site examination but also in all nuclear-related facilities
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The Texas concurrent characterization, licensing, and development process
Energy Technology Data Exchange (ETDEWEB)
Avant, R.V. Jr. [Texas Low-Level Radioactive Waste Disposal Authority, Austin, TX (United States)
1993-03-01
The 72nd Texas Legislature specifically delineated a 400-square-mile area in southeast Hudspeth County where siting activities would be limited. The Authority was given unprecedented powers of property access and eminent domain and expanded budget authority to conduct site selection, characterization, and licensing. In the summer of 1991, the Authority identified five general siting areas in the prescribed region, and in the fall of 1991, the Authority narrowed the siting area to one large ranch composed of about 16,000 acres--called the Faskin Ranch. Site characterization began in 1991 and will be complete by September 1993. In September 1991, Authority staff began preparing the license application and included all available information on the Faskin Ranch. At its February meeting, the Authority`s board directed staff to submit the license application to the Texas Water Commission (the new Texas radiation control agency). The license application was submitted on March 2, 1992, and on April 15, 1992, the Commission determined that the application was sufficiently complete to begin review. Discrete technical packages such as groundwater hydrology, surface water hydrology, design, etc., will be submitted to the agency for review on the completion of each package. A schedule has been developed to allow the regulators the maximum time possible to review critical technical areas while minimizing the total review period.
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La España de Rosas Blancas = The Spain of Rosas Blancas
Directory of Open Access Journals (Sweden)
Óscar Gual Boronat
2015-06-01
Full Text Available Mediante la lectura del cuaderno femenino español Rosas blancas, publicado por la editorial Toray entre 1958 y 1965, tratamos de estudiar la capacidad del cómic para reflejar el papel de la mujer durante una de las etapas clave de la dictadura franquista. Tras trazar un recorrido por los tebeos sentimentales de la década de 1940 (Azucena y las primeras revistas modernas para niñas (Florita y Sissi, analizaremos el contenido de dicha publicación. En ese análisis percibiremos cómo Rosas blancas prolongará determinados mitos de aquellas historietas al tiempo que introducirá nuevas perspectivas en consonancia con lo que estaba sucediendo en la sociedad española.Through the reading of the Spanish female comic-book Rosas blancas, published by Editorial Toray between 1958 and 1965, we try to explore the ability of comics to reflect the role of women during the key stages of the Franco dictatorship. After a study of the sentimental comics of the 1940s (Azucena and the first modern magazines for girls (Florita and Sissi, we analyse the content of this publication. In this analysis we perceive how Rosas blancas extend certain myths while those cartoons introduce new perspectives in line with what was happening in the Spanish society.
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The Family Partnership on the Ranch.
Stoeltje, Beverly J.
This paper contends that women are as vital as men to the functioning of western ranches where cattle raising--or cattle culture--is central to the social system. The self-sufficient nuclear family is also emphasized, and a ranch couple is described as a business as well as a domestic partnership. Ranch women have four roles: rearing children,…
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Economics of ocean ranching: experiences, outlook and theory
National Research Council Canada - National Science Library
Ragnar Arnason
2001-01-01
"The author distinguishes between ocean fish farming and ocean ranching. The distinguishing characteristic of ocean ranching is that the released species are unassisted once released into the ocean...
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Comparative Economics of Cattle and Wildlife Ranching in the Zimbabwe Midlands
Kreuter, Urs P.
1992-01-01
The economics of ranches in the Zimbabwe Midlands, generating income from cattle, or wildlife, or both, were compared during 1989/90 to test the claim that wildlife ranching can generate greater profits than cattle ranching on semi-arid African savannas. Both financial (market) prices and economic prices (opportunity cost) were used. Financial data were obtained from 15 cattle, 7 wildlife and 13 mixed ranches in four areas with wildlife and from 15 cattle ranches in two areas with sparse w...
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THE PENA BLANCA NATURAL ANALOGUE PERFORMANCE ASSESSMENT MODEL
Energy Technology Data Exchange (ETDEWEB)
G.J. Saulnier Jr; W. Statham
2006-03-10
The Nopal I uranium mine in the Sierra Pena Blanca, Chihuahua, Mexico serves as a natural analogue to the Yucca Mountain repository. The Pena Blanca Natural Analogue Performance Assessment Model simulates the mobilization and transport of radionuclides that are released from the mine and transported to the saturated zone. the Pena Blanca Natural Analogue Model uses probabilistic simulations of hydrogeologic processes that are analogous to the processes that occur at the Yucca Mountain site. The Nopal I uranium deposit lies in fractured, welded, and altered rhyolitic ash flow tuffs that overlie carbonate rocks, a setting analogous to the geologic formations at the Yucca Mountain site. The Nopal I mine site has the following characteristics as compared to the Yucca Mountain repository site. (1) Analogous source: UO{sub 2} uranium ore deposit = spent nuclear fuel in the repository; (2) Analogous geologic setting: fractured, welded, and altered rhyolitic ash flow tuffs overlying carbonate rocks; (3) Analogous climate: Semiarid to arid; (4) Analogous geochemistry: Oxidizing conditions; and (5) Analogous hydrogeology: The ore deposit lies in the unsaturated zone above the water table. The Nopal I deposit is approximately 8 {+-} 0.5 million years old and has been exposed to oxidizing conditions during the last 3.2 to 3.4 million years. The Pena Blanca Natural Analogue Model considers that the uranium oxide and uranium silicates in the ore deposit were originally analogous to uranium-oxide spent nuclear fuel. The Pena Blanca site has been characterized using field and laboratory investigations of its fault and fracture distribution, mineralogy, fracture fillings, seepage into the mine adits, regional hydrology, and mineralization that shows the extent of radionuclide migration. Three boreholes were drilled at the Nopal I mine site in 2003 and these boreholes have provided samples for lithologic characterization, water-level measurements, and water samples for laboratory
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THE PENA BLANCA NATURAL ANALOGUE PERFORMANCE ASSESSMENT MODEL
International Nuclear Information System (INIS)
G.J. Saulnier Jr; W. Statham
2006-01-01
The Nopal I uranium mine in the Sierra Pena Blanca, Chihuahua, Mexico serves as a natural analogue to the Yucca Mountain repository. The Pena Blanca Natural Analogue Performance Assessment Model simulates the mobilization and transport of radionuclides that are released from the mine and transported to the saturated zone. the Pena Blanca Natural Analogue Model uses probabilistic simulations of hydrogeologic processes that are analogous to the processes that occur at the Yucca Mountain site. The Nopal I uranium deposit lies in fractured, welded, and altered rhyolitic ash flow tuffs that overlie carbonate rocks, a setting analogous to the geologic formations at the Yucca Mountain site. The Nopal I mine site has the following characteristics as compared to the Yucca Mountain repository site. (1) Analogous source: UO 2 uranium ore deposit = spent nuclear fuel in the repository; (2) Analogous geologic setting: fractured, welded, and altered rhyolitic ash flow tuffs overlying carbonate rocks; (3) Analogous climate: Semiarid to arid; (4) Analogous geochemistry: Oxidizing conditions; and (5) Analogous hydrogeology: The ore deposit lies in the unsaturated zone above the water table. The Nopal I deposit is approximately 8 ± 0.5 million years old and has been exposed to oxidizing conditions during the last 3.2 to 3.4 million years. The Pena Blanca Natural Analogue Model considers that the uranium oxide and uranium silicates in the ore deposit were originally analogous to uranium-oxide spent nuclear fuel. The Pena Blanca site has been characterized using field and laboratory investigations of its fault and fracture distribution, mineralogy, fracture fillings, seepage into the mine adits, regional hydrology, and mineralization that shows the extent of radionuclide migration. Three boreholes were drilled at the Nopal I mine site in 2003 and these boreholes have provided samples for lithologic characterization, water-level measurements, and water samples for laboratory analysis
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Structure of Sierra Blanca (Alpujarride Complex, west of the Betic Cordillera
Directory of Open Access Journals (Sweden)
Andreo, B.
1995-04-01
Full Text Available Sierra Blanca, situated in the SW of Málaga, forms part of the Blanca unit, belonging to the Alpujarride Complex of the Betic Cordillera. Its lithologic sequences are made up of a group of migmatites, gneisses and schists and an upper formation of marbles (white dolomitic and the bottom and blue calcareous towards the top, linked with a transitional contact. The structure of Sierra Blanca is comprised of folds, generally isoclinal, with reversed limbs and with important tectonic transpositions, the direction of which is approximately E-W in the eastern area and N-S and E-W in the West. In both areas the folds present opposing vergences, consistently towards the interior of the sierra. The origin of these structures is explained with a model of westerly movements of the Blanca unit, in relation to the Los Reales unit, with the formation of frontal and lateral folds. In its advancement, the western part of Sierra Blanca underwent an important anti-clockwise rotation responsible for the co-existence of folds in N-S and E-W directions. These structures occurred under ductile conditions, owing to the presence of important overthrusting peridotitic masses of the Los Reales unit. This model of westerly displacement is inserted in the process undergone by the Betic-Rif Internal Zones (with Blanca and Los Reales units included which occurred at the end of the Oligocene-Early Miocene when the Gibraltar arch began to be formed.Sierra Blanca, situada al SW de Málaga, forma parte de la unidad de Blanca que pertenece al complejo Alpujárride de la Cordillera Bética. Su secuencia litológica está compuesta por un conjunto inferior de migmatitas, gneises y esquistos, y por una formación superior de mármoles, blancos dolomíticos en la base y mármoles calizos azules hacia la parte superior, entre los que existe un tránsito gradual. La estructura de Sierra Blanca está formada por pliegues, generalmente isoclinales, con flancos invertidos que muestran
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Calculating stocking rates for game ranches: substitution ratios for ...
African Journals Online (AJOL)
Calculating stocking rates for game ranches: substitution ratios for use in the Mopani ... Reports on a study conducted to quantify the overlap in ungulate resource-use on a game ranch, and to demonstrate how ... AJOL African Journals Online.
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Nichols Ranch ISL Uranium Mine - A case history
International Nuclear Information System (INIS)
Catchpole, G.; Thomas, G.
2014-01-01
The Nichols Ranch ISL Uranium Mine is located in the Powder River Basin of Wyoming, U.S.A. The mine is owned and operated by Uranerz Energy Corporation (Uranerz), a U.S. corporation headquartered in Casper, Wyoming. Nichols Ranch started operations in February 2014 and is the newest uranium mine to go into production in the USA. The uranium being extracted is hosted in a sandstone, roll-front deposit at a depth ranging from 400 to 800 feet [~120 to ~240 m). The In-Situ Recovery (ISL) mining method is employed at the Nichols Ranch mine which is the method currently being utilized at most uranium mines in the USA. Environmental permit applications for the Nichols Ranch mine were submitted to the appropriate regulatory agencies in late 2007. It required more than three and a half years to obtain all the necessary permits and licenses to construct and operate the mine. Construction of the mining facilities and the first wellfield started in late 2011 and was completed in late 2013. Mining results to date have been better than anticipated and Uranerz expects to reach its 2014 production target. The most challenging part of getting a new uranium mine in production in the United States of America was the three plus years it took to get through the environmental permitting process. Uranerz was one of three companies in 2011 that applied for permits to construct and operate uranium mines in Wyoming at essentially the same time. The Nichols Ranch mine is licensed to produce up to two million pounds per year of uranium (as U_3O_8) [~770 tU] ready for shipment to the converter. At this time only the ion exchange portion of the central processing plant has been installed at Nichols Ranch with uranium loaded resin being shipped to Cameco’s nearby Smith Ranch – Highland ISL uranium mine for elution, precipitation, drying and packaging under a toll processing agreement. Cameco provides Uranerz with dried and drummed yellowcake that Uranerz owns which is shipped to the
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Lindsey, Peter A; Barnes, Jonathan; Nyirenda, Vincent; Pumfrett, Belinda; Tambling, Craig J; Taylor, W Andrew; t'Sas Rolfes, Michael
2013-01-01
The number and area of wildlife ranches in Zambia increased from 30 and 1,420 km(2) in 1997 to 177 and ∼6,000 km(2) by 2012. Wild ungulate populations on wildlife ranches increased from 21,000 individuals in 1997 to ∼91,000 in 2012, while those in state protected areas declined steeply. Wildlife ranching and crocodile farming have a turnover of ∼USD15.7 million per annum, compared to USD16 million from the public game management areas which encompass an area 29 times larger. The wildlife ranching industry employs 1,200 people (excluding jobs created in support industries), with a further ∼1,000 individuals employed through crocodile farming. Wildlife ranches generate significant quantities of meat (295,000 kg/annum), of which 30,000 kg of meat accrues to local communities and 36,000 kg to staff. Projected economic returns from wildlife ranching ventures are high, with an estimated 20-year economic rate of return of 28%, indicating a strong case for government support for the sector. There is enormous scope for wildlife ranching in Zambia due to the availability of land, high diversity of wildlife and low potential for commercial livestock production. However, the Zambian wildlife ranching industry is small and following completion of field work for this study, there was evidence of a significant proportion of ranchers dropping out. The industry is performing poorly, due to inter alia: rampant commercial bushmeat poaching; failure of government to allocate outright ownership of wildlife to landowners; bureaucratic hurdles; perceived historical lack of support from the Zambia Wildlife Authority and government; a lack of a clear policy on wildlife ranching; and a ban on hunting on unfenced lands including game ranches. For the wildlife ranching industry to develop, these limitations need to be addressed decisively. These findings are likely to apply to other savanna countries with large areas of marginal land potentially suited to wildlife ranching.
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Directory of Open Access Journals (Sweden)
Peter A Lindsey
Full Text Available The number and area of wildlife ranches in Zambia increased from 30 and 1,420 km(2 in 1997 to 177 and ∼6,000 km(2 by 2012. Wild ungulate populations on wildlife ranches increased from 21,000 individuals in 1997 to ∼91,000 in 2012, while those in state protected areas declined steeply. Wildlife ranching and crocodile farming have a turnover of ∼USD15.7 million per annum, compared to USD16 million from the public game management areas which encompass an area 29 times larger. The wildlife ranching industry employs 1,200 people (excluding jobs created in support industries, with a further ∼1,000 individuals employed through crocodile farming. Wildlife ranches generate significant quantities of meat (295,000 kg/annum, of which 30,000 kg of meat accrues to local communities and 36,000 kg to staff. Projected economic returns from wildlife ranching ventures are high, with an estimated 20-year economic rate of return of 28%, indicating a strong case for government support for the sector. There is enormous scope for wildlife ranching in Zambia due to the availability of land, high diversity of wildlife and low potential for commercial livestock production. However, the Zambian wildlife ranching industry is small and following completion of field work for this study, there was evidence of a significant proportion of ranchers dropping out. The industry is performing poorly, due to inter alia: rampant commercial bushmeat poaching; failure of government to allocate outright ownership of wildlife to landowners; bureaucratic hurdles; perceived historical lack of support from the Zambia Wildlife Authority and government; a lack of a clear policy on wildlife ranching; and a ban on hunting on unfenced lands including game ranches. For the wildlife ranching industry to develop, these limitations need to be addressed decisively. These findings are likely to apply to other savanna countries with large areas of marginal land potentially suited to wildlife
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Lindsey, Peter A.; Barnes, Jonathan; Nyirenda, Vincent; Pumfrett, Belinda; Tambling, Craig J.; Taylor, W. Andrew; Rolfes, Michael t’Sas
2013-01-01
The number and area of wildlife ranches in Zambia increased from 30 and 1,420 km2 in 1997 to 177 and ∼6,000 km2 by 2012. Wild ungulate populations on wildlife ranches increased from 21,000 individuals in 1997 to ∼91,000 in 2012, while those in state protected areas declined steeply. Wildlife ranching and crocodile farming have a turnover of ∼USD15.7 million per annum, compared to USD16 million from the public game management areas which encompass an area 29 times larger. The wildlife ranching industry employs 1,200 people (excluding jobs created in support industries), with a further ∼1,000 individuals employed through crocodile farming. Wildlife ranches generate significant quantities of meat (295,000 kg/annum), of which 30,000 kg of meat accrues to local communities and 36,000 kg to staff. Projected economic returns from wildlife ranching ventures are high, with an estimated 20-year economic rate of return of 28%, indicating a strong case for government support for the sector. There is enormous scope for wildlife ranching in Zambia due to the availability of land, high diversity of wildlife and low potential for commercial livestock production. However, the Zambian wildlife ranching industry is small and following completion of field work for this study, there was evidence of a significant proportion of ranchers dropping out. The industry is performing poorly, due to inter alia: rampant commercial bushmeat poaching; failure of government to allocate outright ownership of wildlife to landowners; bureaucratic hurdles; perceived historical lack of support from the Zambia Wildlife Authority and government; a lack of a clear policy on wildlife ranching; and a ban on hunting on unfenced lands including game ranches. For the wildlife ranching industry to develop, these limitations need to be addressed decisively. These findings are likely to apply to other savanna countries with large areas of marginal land potentially suited to wildlife ranching. PMID:24367493
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Ranch business planning and resource monitoring for rangeland sustainability
Kristie A. Maczko; John A. Tanaka; Michael Smith; Cindy Garretson-Weibel; Stanley F. Hamilton; John E. Mitchell; Gene Fults; Charles Stanley; Dick Loper; Larry D. Bryant; J. K. (Rooter) Brite
2012-01-01
Aligning a rancher's business plan goals with the capability of the ranch's rangeland resources improves the viability and sustainability of family ranches. Strategically monitoring the condition of soil, water, vegetation, wildlife, livestock production, and economics helps inform business plan goals. Business planning and resource monitoring help keep...
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Herida precordial por arma blanca
Directory of Open Access Journals (Sweden)
Marcelo F. Jiménez
2005-04-01
Full Text Available Varón de 42 años con esquizofrenia paranoide. Intento de suicidio con tres autolesiones por arma blanca (Fig. 1. Fue traído al hospital en estado consciente, taquicárdico, taquipneico y con tensión arterial (TA de 140/90 mmHg. Fue trasladado al quirófano, donde se practicó una toracotomía axilar izquierda sin extraer el arma. Durante la intervención se apreciaron tres heridas incisas, dos no penetrantes, hemotórax de 150 ml, herida pericárdica de 4 cm, sin lesiones cardíacas. La hoja del arma blanca penetraba a través del diafragma produciendo una herida incisa en el lóbulo hepático izquierdo (Fig. 2. Se extrajo el arma y se suturó la laceración hepática. El paciente fue trasladado el cuarto día a la Unidad de Psiquiatría.
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A Working Ranch with an Effective Medusahead Management Program
Since 2005, rancher Ben McGough, owner of the Circle Bar Ranch in Mitchell, Oregon, has been working with USDA-ARS rangeland ecologist Roger Sheley to implement EBIPM on the ranch. More than 600 acres were infested with medusahead (Taeniatherum caput-medusae) when they began working together. We de...
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Stakeholder Theory and Rangeland Management: The Importance of Ranch Income Dependence
Elias, S.; Roche, L. M.; Elias, E.
2016-12-01
The California drought beginning in 2012 has been driven by reduced precipitation and record high temperatures. Hydrologic drought in the Southwest United States is projected to become the new climatology of the region. While ranchers are considered naturally adaptive, often adeptly altering management based upon conditions, the projected increased aridity may challenge rangeland management. Certain rancher characteristics are likely to impact how well ranchers adapt. Based on Stakeholder Theory (ST), we hypothesize that the extent to which ranchers are dependent on their ranches as a source of income would serve as a predictor of several key variables related to ranching adaptation and success. Data were obtained from 507 ranchers throughout the State of California via the Rangeland Decision-Making Survey implemented by University of California, Davis in 2010, just prior to the unprecedented California drought. Consistent with the ST urgency facet, results of linear regression analyses indicate the more dependent ranchers are on their ranches for their income, the more aware they are of USDA ranching initiatives (β = 0.19, p < .001) and state ranching initiatives (β = 0.10, p < .05). In addition, more dependent ranchers are more likely to use multiple and diverse sources of information about ranching (β = 0.18, p < .001), are more likely to realize the severity and extent of the most recent drought's impacts (β = 0.18, p < .001), and were more likely to have a drought management plan in place during the most recent drought (β = 0.18, p < .001). These findings are important in relation to both outreach/extension efforts and rangeland research. Outreach/extension efforts should take into account that people less dependent on their ranches are less aware of resources, as well as, less prepared to adapt to drought. Researchers should control for the extent to which ranchers are dependent on their ranches for income in order to ensure more accurate findings.
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Natural Analog Studies at Pena Blanca, Mexico
Energy Technology Data Exchange (ETDEWEB)
A.M. Simmons
2005-07-11
The significance of the Pena Blanca uranium deposits in the State of Chihuahua, Mexico as potential natural analogs for a nuclear waste repository in unsaturated welded tuff was first recognized in the 1980s. In the 1970s, the Pena Blanca region was a major target of uranium exploration and exploitation by the Mexican government. Since then the Nopal I uranium deposit has been studied extensively by researchers in the U.S., Mexico, and Europe. The Nopal I deposit represents an environment similar to that of the proposed high-level radioactive waste repository at Yucca Mountain in many ways. Both are located in semi-arid regions. Both are located in Tertiary rhyolitic tuffs overlying carbonate rocks that have been subjected to basin and range-style tectonic deformation. Both are located in a chemically oxidizing, unsaturated zone 200 m or more above the water table. The alteration of uraninite to secondary minerals at Nopal I may be similar to the alteration of uranium fuel rods in this type of setting. Investigations at Nopal I and in the surrounding Sierra Pena Blanca have included detailed outcrop mapping, hydrologic and isotopic studies of flow and transport, studies of mineral alteration, modeling, and performance assessment.
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Natural Analog Studies at Pena Blanca, Mexico
International Nuclear Information System (INIS)
A.M. Simmons
2005-01-01
The significance of the Pena Blanca uranium deposits in the State of Chihuahua, Mexico as potential natural analogs for a nuclear waste repository in unsaturated welded tuff was first recognized in the 1980s. In the 1970s, the Pena Blanca region was a major target of uranium exploration and exploitation by the Mexican government. Since then the Nopal I uranium deposit has been studied extensively by researchers in the U.S., Mexico, and Europe. The Nopal I deposit represents an environment similar to that of the proposed high-level radioactive waste repository at Yucca Mountain in many ways. Both are located in semi-arid regions. Both are located in Tertiary rhyolitic tuffs overlying carbonate rocks that have been subjected to basin and range-style tectonic deformation. Both are located in a chemically oxidizing, unsaturated zone 200 m or more above the water table. The alteration of uraninite to secondary minerals at Nopal I may be similar to the alteration of uranium fuel rods in this type of setting. Investigations at Nopal I and in the surrounding Sierra Pena Blanca have included detailed outcrop mapping, hydrologic and isotopic studies of flow and transport, studies of mineral alteration, modeling, and performance assessment
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THE PENA BLANCA NATURAL ANALOGUE PERFORMANCE ASSESSMENT MODEL
Energy Technology Data Exchange (ETDEWEB)
G. Saulnier and W. Statham
2006-04-16
The Nopal I uranium mine in the Sierra Pena Blanca, Chihuahua, Mexico serves as a natural analogue to the Yucca Mountain repository. The Pena Blanca Natural Analogue Performance Assessment Model simulates the mobilization and transport of radionuclides that are released from the mine and transported to the saturated zone. The Pena Blanca Natural Analogue Performance Assessment Model uses probabilistic simulations of hydrogeologic processes that are analogous to the processes that occur at the Yucca Mountain site. The Nopal I uranium deposit lies in fractured, welded, and altered rhyolitic ash-flow tuffs that overlie carbonate rocks, a setting analogous to the geologic formations at the Yucca Mountain site. The Nopal I mine site has the following analogous characteristics as compared to the Yucca Mountain repository site: (1) Analogous source--UO{sub 2} uranium ore deposit = spent nuclear fuel in the repository; (2) Analogous geology--(i.e. fractured, welded, and altered rhyolitic ash-flow tuffs); (3) Analogous climate--Semiarid to arid; (4) Analogous setting--Volcanic tuffs overlie carbonate rocks; and (5) Analogous geochemistry--Oxidizing conditions Analogous hydrogeology: The ore deposit lies in the unsaturated zone above the water table.
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THE PENA BLANCA NATURAL ANALOGUE PERFORMANCE ASSESSMENT MODEL
International Nuclear Information System (INIS)
G. Saulnier; W. Statham
2006-01-01
The Nopal I uranium mine in the Sierra Pena Blanca, Chihuahua, Mexico serves as a natural analogue to the Yucca Mountain repository. The Pena Blanca Natural Analogue Performance Assessment Model simulates the mobilization and transport of radionuclides that are released from the mine and transported to the saturated zone. The Pena Blanca Natural Analogue Performance Assessment Model uses probabilistic simulations of hydrogeologic processes that are analogous to the processes that occur at the Yucca Mountain site. The Nopal I uranium deposit lies in fractured, welded, and altered rhyolitic ash-flow tuffs that overlie carbonate rocks, a setting analogous to the geologic formations at the Yucca Mountain site. The Nopal I mine site has the following analogous characteristics as compared to the Yucca Mountain repository site: (1) Analogous source--UO 2 uranium ore deposit = spent nuclear fuel in the repository; (2) Analogous geology--(i.e. fractured, welded, and altered rhyolitic ash-flow tuffs); (3) Analogous climate--Semiarid to arid; (4) Analogous setting--Volcanic tuffs overlie carbonate rocks; and (5) Analogous geochemistry--Oxidizing conditions Analogous hydrogeology: The ore deposit lies in the unsaturated zone above the water table
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Margirier, Audrey; Braun, Jean; Robert, Xavier; Audin, Laurence
2018-03-01
The processes driving uplift and exhumation of the highest Peruvian peaks (the Cordillera Blanca) are not well understood. Uplift and exhumation seem closely linked to the formation and movement on the Cordillera Blanca normal fault (CBNF) that delimits and shapes the western flank of the Cordillera Blanca. Several models have been proposed to explain the presence of this major normal fault in a compressional setting, but the CBNF and the Cordillera Blanca recent rapid uplift remain enigmatic. Whereas the Cordillera Blanca morphology demonstrates important erosion and thus a significant mass of rocks removal, the impact of erosion and isostasy on the evolution of the Cordillera Blanca uplift rates has never been explored. We address the role of erosion and associated flexural rebound in the uplift and exhumation of the Cordillera Blanca with numerical modeling of landscape evolution. We perform inversions of the broad features of the present-day topography, total exhumation and thermochronological data using a landscape evolution model (FastScape) to provide constraints on the erosion efficiency factor, the uplift rate and the temperature gradient. Our results evidence the not negligible contribution of erosion and associated flexural rebound to the uplift of the Cordillera Blanca and allow us to question the models previously proposed for the formation of the CBNF.
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Efecto de dos agentes remineralizantes en lesiones de mancha blanca: Estudio in Vitro
Directory of Open Access Journals (Sweden)
Grace Maribel Chicaiza Naranjo
2016-07-01
Full Text Available La caries dental continúa siendo la enfermedad con mayor prevalencia en el mundo, es importante diagnosticarla y tratarla desde su estadio inicial de mancha blanca ya que es una lesión reversible. La aparición de nuevos materiales como el fosfopéptido de caseína- estabilizado de fosfato de calcio amorfo (Recaldent para remineralizar las manchas blancas nos brindan más opciones terapéuticas en Odontopediatria. Objetivo: Evaluar in-vitro la remineralización de la mancha blanca a partir de la aplicación de las pastas dentales a base de Recaldent: Mi Paste y Mi Paste Plus en dientes temporales. Materiales y métodos: Fueron utilizados 30 dientes temporales sanos obtenidos por movilidad fisiológica, divididos en Grupo A 15 dientes, Grupo B 15 dientes, en ambos grupos se generó la mancha blanca con un agente desmineralizante, para la remineralización al grupo A se le aplicó Mi Paste, al grupo B Mi Paste Plus, se evaluó el grado de desmineralización y remineralización mediante un láser, Diagnodent, después de 10 días de la aplicación de las pastas dentales. Resultados: Se demostró que en ambos grupos existió remineralización de la mancha blanca, 14.73 grados de fluorescencia con Mi Paste y 15.67 grados con Mi Paste Plus, siendo mayor el grupo B. Conclusión: Concluyendo que, si existe remineralización de la mancha blanca a partir de la aplicación de pasta dental, Mi Paste y Mi Paste Plus con derivados de la caseína (Recaldent en dientes temporales, estudio in vitro. Logrando mejores resultados al utilizar Mi Paste Plus.
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2012-09-19
... NUCLEAR REGULATORY COMMISSION [Docket No. 04008964, NRC-2012-0214] Power Resources, Inc., Smith... available in ADAMS) is provided the first time that a document is referenced. The Smith Ranch Highland... (Smith Ranch Technical Report); Accession No. ML12234A539 (Smith Ranch Environmental Report). In addition...
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Traditional ranching heritage and cultural continuity in the southwestern United States
Carol Raish; Alice M. McSweeney
2008-01-01
This study, conducted among ranchers on the Santa Fe and Carson National Forests in the Southwestern United States, examines the role of ranching in maintaining traditional heritage and cultural continuity. The mainly Hispanic ranching families of northern New Mexico first came into the region in 1598 with Spanish colonization. Many of the villages received community...
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Power in the pasture: Energy and the history of ranching in western South Dakota
Howe, Jenika
Transitions in the use of energy transformed the landscape, labor, and domestic life of cattle ranching in western South Dakota from the late-nineteenth to the middle of the twentieth centuries. The introduction of new energy sources to the Black Hills spurred the expansion of European Americans into the region, while helping to displace native peoples like the Lakotas. Changing energy use also intensified ranch labor in the pastures and in the household, drawing individual ranches into new connections with their surroundings. Examining cattle ranching through the lens of energy provides new insights into the momentum of energetic systems in societies, affording historians a way to understand past energy use as they consider present and future environmental concerns.
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2013-06-06
... Springs Ranch, LLC (transferee) filed an application for the transfer of license for the L & M Angus Ranch..., Idaho. Applicants seek Commission approval to transfer the license for the L & M Angus Ranch Project...
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Tidal wetland vegetation and ecotone profiles: The Rush Ranch Open Space Preserve
The Rush Ranch Open Space Preserve (Rush Ranch) is a component site of the San Francisco Bay National Estuarine Research Reserve (SF Bay NERR) that includes one of the largest undiked tidal wetlands in the San Francisco Estuary. The brackish tidal wetlands grade into transitional vegetation and unde...
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Acorns - Spears and Didion Ranches [ds322
California Natural Resource Agency — These data are the characteristics and acorn counts from 2005 of individual live oak trees found in 0.05-ha circular habitat plots at Spears and Didion Ranches,...
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Margirier, A.; Robert, X.; Braun, J.; Laurence, A.
2017-12-01
The uplift and exhumation of the highest Peruvian peaks seems closely linked to the Cordillera Blanca normal fault that delimits and shape the western flank of the Cordillera Blanca. Two models have been previously proposed to explain the occurrence of extension and the presence of this active normal fault in a compression setting but the Cordillera Blanca normal fault and the uplift and exhumation of the Cordillera Blanca remain enigmatic. Recent studies suggested an increase of exhumation rates during the Quaternary in the Cordillera Blanca and related this increase to a change in climate and erosion process (glacial erosion vs. fluvial erosion). The Cordillera Blanca granite has been significantly eroded since its emplacement (12-5 Ma) indicating a significant mass of rocks removal. Whereas it has been demonstrated recently that the effect of eroding denser rocks can contribute to an increase of uplift rate, the impact of erosion and isostasy on the increase of the Cordillera Blanca uplift rates has never been explored. Based on numerical modeling of landscape evolution we address the role of erosion and isostasy in the uplift and exhumation of the Cordillera Blanca. We performed inversions of the present-day topography, total exhumation and thermochronological data using a landscape evolution model (FastScape). Our results evidence the contribution of erosion and associated flexural rebound to the uplift of the Cordillera Blanca. Our models suggest that the erosion of the Cordillera Blanca dense intrusion since 3 Ma could also explain the Quaternary exhumation rate increase in this area. Finally, our results allow to question the previous models proposed for the formation of the Cordillera Blanca normal fault.
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Habitat characteristic of two selected locations for sea cucumber ranching purposes
Hartati, Retno; Trianto, Agus; Widianingsih
2017-02-01
Sea cucumbers face heavily overfished because of their high prices and very strong market demand. One effort suggested to overcome this problem is sea ranching. The objectives of present works were to determine biological, physical, and chemical characteristics of prospective location for sea ranching of sea cucumber Holothuria atra. Two location at Jepara Waters (Teluk Awur and Bandengan WateRs of Jepara Regency) were selected. The determination of chemical (salinity, temperature, dissolved oxygen of water, phosphate, nitrate, nitrite and ammonium of water and sediment, organic matters of sediment), physical (transparancy, sedimen grains size, water current direction and its velocity), biologycal characteristic (coverage of seagrass and its macroalgae associated, phytoplankton as well as chlorophyl-a and phaeopytin of water and sediment) ware determined. The result of present work showed that some characteristic were matched with requirement as sea ranching location of sea cucumber because the density of sea cucumber in the sea is a function of habitat features. For sediment feeding holothurians of the family Aspidochirotida, the biologycal characteristic act as very important considerations by providing sea cucumber food. High cholophyl-a and phaeopytin in sediment also represent a prosperous habitat for sea cucumber ranching.
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NSR&D FY17 Report: CartaBlanca Capability Enhancements
Energy Technology Data Exchange (ETDEWEB)
Long, Christopher Curtis [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Dhakal, Tilak Raj [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Zhang, Duan Zhong [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
2017-10-19
Over the last several years, particle technology in the CartaBlanca code has been matured and has been successfully applied to a wide variety of physical problems. It has been shown that the particle methods, especially Los Alamos's dual domain material point method, is capable of computing many problems involves complex physics, chemistries accompanied by large material deformations, where the traditional finite element or Eulerian method encounter significant difficulties. In FY17, the CartaBlanca code has been enhanced with physical models and numerical algorithms. We started out to compute penetration and HE safety problems. Most of the year we focused on the TEPLA model improvement testing against the sweeping wave experiment by Gray et al., because it was found that pore growth and material failure are essentially important for our tasks and needed to be understood for modeling the penetration and the can experiments efficiently. We extended the TEPLA mode from the point view of ensemble phase average to include the effects of nite deformation. It is shown that the assumed pore growth model in TEPLA is actually an exact result from the theory. Alone this line, we then generalized the model to include finite deformations to consider nonlinear dynamics of large deformation. The interaction between the HE product gas and the solid metal is based on the multi-velocity formation. Our preliminary numerical results suggest good agreement between the experiment and the numerical results, pending further verification. To improve the parallel processing capabilities of the CartaBlanca code, we are actively working with the Next Generation Code (NGC) project to rewrite selected packages using C++. This work is expected to continue in the following years. This effort also makes the particle technology developed with CartaBlanca project available to other part of the laboratory. Working with the NGC project and rewriting some parts of the code also given us an
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The South African wildlife ranching sector: A Social Accounting Matrix Leontief multiplier analysis
Directory of Open Access Journals (Sweden)
Philippus C. Cloete
2014-10-01
Research purpose: The purpose of this article is to put into context the relative economic contribution of the wildlife ranching sector, as opposed to other land-use options in South Africa. Motivation for the study: Growth in the wildlife ranching sector at the cost of other traditional farming practices resulted in disagreements amongst various role players about the impact thereof on the national economy. The controversy can most probably be explained by different beliefs, coupled with the lack of a proper understanding and quantification of the wildlife ranching sector’s contribution toward the economy. Research methodology: The study employed a Social Accounting Matrix-based Leontief multiplier analysis for South Africa. Main findings: Results from the multiplier analysis revealed that developments within the wildlife ranching sector are likely to make a relatively more superior contribution towards the economy, especially when compared to similar land-use options such as extensive livestock production. Practical/managerial implications: It has been acknowledged by both academia and private sector that a major need exists for more research on the South African wildlife ranching industry, specifically looking at issues such as the industries, economic and social contributions, potentials and constraints. The research, therefore, contributes toward the depth of economic information and research regarding the South African wildlife sector. Contribution/value added: The research provides valuable information in dealing with the ‘popular belief’, especially amongst some of South Africa’s decision makers, namely, that growth in the wildlife ranching sector is not or does not have the ability to contribute significantly toward economic and socioeconomic factors.
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Kansas Farm and Ranch Management Project.
Albracht, James, Ed.
Thirty-four units of instruction are included in this core curriculum in farm management for postsecondary farm and ranch management programs. Units of instruction are divided into twelve instructional areas: (1) Introduction to Financial Management, (2) Farm Business Arrangement, (3) Credit Management, (4) Budgeting, (5) Record Keeping, (6)…
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Vegetation map and plant checklist of Ol Ari Nyiro ranch and the ...
African Journals Online (AJOL)
Ol Ari Nyiro is a 360 km2 ranch of the Laikipia Plateau, in a semi-arid part of Kenya. The vegetation of the ranch and nearby Mukutan Gorge was mapped, and a preliminary check-list of fungi and vascular plants compiled. The vegetation was classified in 16 different types. A total of 708 species and subspecies were ...
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Regional Analysis of the Hazard Level of Glacial Lakes in the Cordillera Blanca, Peru
Chisolm, Rachel E.; Jhon Sanchez Leon, Walter; McKinney, Daene C.; Cochachin Rapre, Alejo
2016-04-01
The Cordillera Blanca mountain range is the highest in Peru and contains many of the world's tropical glaciers. This region is severely impacted by climate change causing accelerated glacier retreat. Secondary impacts of climate change on glacier retreat include stress on water resources and the risk of glacial lake outburst floods (GLOFs) from the many lakes that are forming and growing at the base of glaciers. A number of GLOFs originating from lakes in the Cordillera Blanca have occurred over the last century, several of which have had catastrophic impacts on cities and communities downstream. Glaciologists and engineers in Peru have been studying the lakes of the Cordillera Blanca for many years and have identified several lakes that are considered dangerous. However, a systematic analysis of all the lakes in the Cordillera Blanca has never before been attempted. Some methodologies for this type of systematic analysis have been proposed (eg. Emmer and Vilimek 2014; Wang, et al. 2011), but as yet they have only been applied to a few select lakes in the Cordillera Blanca. This study uses remotely sensed data to study all of the lakes of the Glacial Lake Inventory published by the Glaciology and Water Resources Unit of Peru's National Water Authority (UGRH 2011). The objective of this study is to assign a level of potential hazard to each glacial lake in the Cordillera Blanca and to ascertain if any of the lakes beyond those that have already been studied might pose a danger to nearby populations. A number of parameters of analysis, both quantitative and qualitative, have been selected to assess the hazard level of each glacial lake in the Cordillera Blanca using digital elevation models, satellite imagery, and glacier outlines. These parameters are then combined to come up with a preliminary assessment of the hazard level of each lake; the equation weighting each parameter draws on previously published methodologies but is tailored to the regional characteristics
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Final report of the Peña Blanca natural analogue project
Energy Technology Data Exchange (ETDEWEB)
Levy, Schön S. [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Goldstein, Steven Joel [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Abdel-Fattah, Amr I. [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Amato, Ronald S. [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Anthony, Elizabeth [Univ. of Texas, El Paso, TX (United States); Cook, Paul [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Dobson, Patrick F. [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Fayek, Mostafa [Univ. of Manitoba, Winnipeg (Canada); French, Diana [Univ. of Texas, El Paso, TX (United States); Garza, Rodrigo de [Univ. Autonoma de Chihuahua (Mexico); Ghezzehei, Teamrat [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Goodell, Philip C. [Univ. of Texas, El Paso, TX (United States); Harder, Steven H. [Univ. of Texas, El Paso, TX (United States); Ku, Teh-Lung [Univ. of Southern California, Los Angeles, CA (United States); Luo, Shangde [Univ. of Southern California, Los Angeles, CA (United States); Murrell, Michael Tildon [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Norman, Deborah E. [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Nunn, Andrew J. [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Oliver, Ronald [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Pekar-Carpenter, Katrina [Univ. of Texas, El Paso, TX (United States); Rearick, Michael Sean [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Ren, Minghua [Univ. of Texas, El Paso, TX (United States); Reyes-Cortes, Ignacio [Univ. Autonoma de Chihuahua (Mexico); Pineda, Jose Alfredo [El Instituto de Ecologia (INECOL) (Mexico); Saulnier, George [AREVA Federal Services LLC, Charlotte, NC (United States); Tarimala, Sowmitri [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Walton, John [Univ. of Texas, El Paso, TX (United States)
2016-10-04
The Peña Blanca region, 50 km north of Chihuahua City, Chihuahua, México, was a target of uranium exploration and mining by the Mexican government. After mining ceased in 1981, researchers became interested in this region as a study area for subsurface uranium migration with relevance to geologic disposal of nuclear waste. Many studies related to this concept were conducted at the Nopal I mine site located on a cuesta (hill) of the Sierra Peña Blanca. This site has geologic, tectonic, hydrologic, and geochemical similarities to Yucca Mountain, Nevada, a formerly proposed site for a high-level nuclear-waste repository in the unsaturated zone. The U.S. Department of Energy (U.S. DOE), Office of Civilian Radioactive Waste Management (OCRWM), sponsored studies at Nopal I in the 1990s and supported the drilling of three research wells – PB1, PB2, and PB3 – at the site in 2003. Beginning in 2004, the Peña Blanca Natural Analogue Project was undertaken by U.S. DOE, OCRWM to develop a three-dimensional conceptual model of the transport of uranium and its radiogenic daughter products at the Nopal I site.
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Forrest Ranch Acquisition, Annual Report 2001-2002.
Energy Technology Data Exchange (ETDEWEB)
Smith, Brent
2003-08-01
Through their John Day Basin Office, the Confederated Tribes of Warm Springs Reservation of Oregon (Tribes) acquired the Forrest Ranch during July of 2002. The property consists of two parcels located in the John Day subbasin within the Columbia basin. The mainstem parcel consists of 3,503 acres and is located 1/2 mile to the east of Prairie City, Oregon on the mainstem of the John Day River. The middle fork parcel consists of 820 acres and is located one mile to the west of the town of Austin, OR on the middle fork John Day River. The Forrest Ranch Project is under a memorandum of agreement with the Bonneville Power Administration (BPA) to provide an annual written report generally describing the real property interests of the project and management activities undertaken or in progress. The Forrest Ranch acquisition was funded by BPA as part of their program to protect, mitigate, and enhance fish and wildlife habitat affected by the operation of their hydroelectric facilities on the Columbia River and its tributaries. Following lengthy negotiations with the BPA and property owner, the Tribes were able to conclude the acquisition of the Forrest Ranch in July of 2002. The intent of the acquisition project was to partially mitigate fish and wildlife impacts for the John Day Dam on the Columbia River as outlined in the Northwest Power Planning Council's Wildlife Program (NPPC 1994, section 11.1, section 7.6). While the Tribes hold fee-title to the property, the BPA has assured a level of program funding through a memorandum of agreement and annual statement of work. As early as 1997, the Tribes identified this property as a priority for restoration in the John Day basin. In 2000, the Tribes arranged an agreement with the landowner to seek funds for the acquisition of both the Middle Fork and upper Mainstem John Day River holdings of Mr. John Forrest. This property had been a priority of not only the Tribes, but of many other basin natural resource agencies. The
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76 FR 77890 - Swan Ranch Railroad, L.L.C.-Operation Exemption-Swan Industrial Park
2011-12-14
... DEPARTMENT OF TRANSPORTATION Surface Transportation Board [Docket No. FD 35574] Swan Ranch Railroad, L.L.C.--Operation Exemption--Swan Industrial Park Swan Ranch Railroad, L.L.C. (SRR),\\1\\ a noncarrier, has filed a verified notice of exemption under 49 CFR 1150.31 to operate, pursuant to an agreement with Cheyenne Logistics Hub, LLC (CLH), all...
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Hu, Qingsong; Rahman, Hafiz Abd ur; Jiang, Yazhou; Zhang, Shouyu; Shentu, Jikang
2018-06-01
Attracting released hatchery-reared fish to designated areas during the growth process is vital to realize the objectives of sea ranching. Based on the bottom artificial reefs and surface kelp culture facilities in the Xiangshan Bay sea ranch, we proposed systematic techniques related to acoustic conditioning of the black seabream ( Sparus macrocephalus). Experiments conducted in 12 m × 10 m × 1.6 m ponds on Xixuan Island showed that black seabream was positively sensitive to 500-600 Hz periodic signals. Conditioned responses were apparent after 8 d. Two to three days were required for recovery of the memory of a conditioned response after a 20-day interval. According to the practical application requirements in the open sea, unattended acoustic conditioning equipment was developed. The ranching equipment was used in 12 m × 12 m × 2.5 m cages, and the behavior of black seabream juveniles was successfully guided after 7 days. Of the 16000 released fish, 82.5% of them were conditioned with a flexible grading net. To avoid inducing a stress response, the juveniles were released into the sea ranch in situ from the net cage. The acoustic conditioning equipments were moved into the open sea and the aggregation phenomenon of the released fish was observed when the sound was played. After 6 months of investigation and based on Sr+ marking, only one acoustically conditioned fish was found outside the 3.5-km2 sea ranch area, thereby reached the goal of guiding activity. The practical effect in the Xiangshan Bay sea ranch showed the validity of the acoustic conditioning system, which may contribute to improve the operation of the sea ranches in the East China Sea.
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Wind Transport of Radionuclide- Bearing Dust, Peña Blanca, Chihuahua, Mexico
Velarde, R.; Goodell, P. C.; Gill, T. E.; Arimoto, R.
2007-05-01
This investigation evaluates radionuclide fractionation during wind erosion of high-grade uranium ore storage piles at Peña Blanca (50km north of Chihuahua City), Chihuahua, Mexico. The aridity of the local environment promotes dust resuspension by high winds. Although active operations ceased in 1983, the Peña Blanca mining district is one of Mexico`s most important uranium ore reserves. The study site contains piles of high grade ore, left loose on the surface, and separated by the specific deposits from which they were derived (Margaritas, Nopal I, and Puerto I). Similar locations do not exist in the United States, since uranium mining sites in the USA have been reclaimed. The Peña Blanca site serves as an analog for the Yucca Mountain project. Dust deposition is collected at Peña Blanca with BSNE sediment catchers (Fryrear, 1986) and marble dust traps (Reheis, 1999). These devices capture windblown sediment; subsequently, the sample data will help quantify potentially radioactive short term field sediment loss from the repository surface and determine sediment flux. Aerosols and surface materials will be analyzed and radioactivity levels established utilizing techniques such as gamma spectroscopy. As a result, we will be able to estimate how much radionuclide contaminated dust is being transported or attached geochemically to fine grain soils or minerals (e.g., clays or iron oxides). The high-grade uranium-bearing material is at secular equilibrium, thus the entire decay series is present. Of resulting interest is not only the aeolian transport of uranium, but also of the other daughter products. These studies will improve our understanding of geochemical cycling of radionuclides with respect to sources, transport, and deposition. The results may also have important implications for the geosciences and homeland security, and potential applications to public health. Funding for this project is provided in part via a NSF grant to Arimoto.
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Herida precordial por arma blanca
Marcelo F. Jiménez; Nuria Novoa; José Luis Aranda; Gonzalo Varela
2005-01-01
Varón de 42 años con esquizofrenia paranoide. Intento de suicidio con tres autolesiones por arma blanca (Fig. 1). Fue traído al hospital en estado consciente, taquicárdico, taquipneico y con tensión arterial (TA) de 140/90 mmHg. Fue trasladado al quirófano, donde se practicó una toracotomía axilar izquierda sin extraer el arma. Durante la intervención se apreciaron tres heridas incisas, dos no penetrantes, hemotórax de 150 ml, herida pericárdica de 4 cm, sin lesiones cardíacas. La hoja del ar...
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Caldwell Ranch Exploration and Confirmation Project, Northwest Geysers, CA
Energy Technology Data Exchange (ETDEWEB)
Walters, Mark A.
2013-04-25
The purpose of the Caldwell Ranch Exploration and Confirmation Project was to drill, test, and confirm the present economic viability of the undeveloped geothermal reservoir in the 870 acre Caldwell Ranch area of the Northwest Geysers that included the CCPA No.1 steam field. All of the drilling, logging, and sampling challenges were met. Three abandoned wells, Prati 5, Prati 14 and Prati 38 were re-opened and recompleted to nominal depths of 10,000 feet in 2010. Two of the wells required sidetracking. The flow tests indicated Prati 5 Sidetrack 1 (P-5 St1), Prati 14 (P-14) and Prati 38 Sidetrack 2 (P-38 St2) were collectively capable of initially producing an equivalent of 12 megawatts (MWe) of steam using a conversion rate of 19,000 pounds of steam/hour
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Herp Coverboard Sampling - Spears and Didion Ranches [ds324
California Natural Resource Agency — These data are detections of reptiles in 2006 under 2 ft x 2 ft dimension plywood coverboards at four of the 15 sample points at Spears and Didion Ranches, Placer...
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2012-01-27
... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [Project No. 13089-002] Conway Ranch Hydropower Project; Notice of Preliminary Permit Application Accepted for Filing and Soliciting Comments... study the feasibility of the Conway Ranch Hydropower Project to be located on Virginia Creek, near the...
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Cordillera Blanca: glaciares en la historia
Directory of Open Access Journals (Sweden)
1995-01-01
Full Text Available CORDILLERE BLANCHE - DES GLACIERS DANS LHISTOIRE. La plus vaste couverture glaciaire de lentre-tropiques napparaît comme un objet détudes que très tard, à la fin du XIXème siècle et, surtout grâce aux expéditions austro-allemandes, à partir des années 1930-1940. Le développement de lalpinisme et un grand nombre de catastrophes meurtrières associées à la dynamique de ces glaciers (rupture de lacs de barrage morainique, avalanches ont attiré lattention sur eux et suscité des recherches glaciologiques. En 1980, ils comptent parmi les mieux surveillés des glaciers tropicaux, dabord grâce à un programme détude développé par les Péruviens eux-mêmes. à un moment où le réchauffement global fait craindre un recul très important de la glaciation dans la zone tropicale, les glaciers de la Cordillère Blanche deviennent dexcellents indicateurs de lévolution climatique en cours et la ressource en eau qui leur est associée constitue à la fois un sujet détude et un enjeu économique de haute importance. La más vasta cobertura glaciar situada entre los trópicos aparece como objeto de estudio relativamente tarde, a fines del siglo XIX, sobre todo gracias a las expediciones austro alemanas a partir de los años 1930-1940. El desarrollo del alpinismo y un gran número de catástrofes mortales asociadas a la dinámica de estos glaciares (rotura de lagunas de represa morrénica, avalanchas atrajeron la atención y suscitaron investigaciones glaciológicas. En 1980, se encuentran entre los mejor monitoreados de los glaciares tropicales, primero, gracias a un programa de estudio desarrollado por los peruanos. En un momento en que el recalentamiento global hace temer un retroceso muy importante de la glaciación en la zona tropical, los glaciares de la Cordillera Blanca se convierten en excelentes indicadores de la evolución climática en curso y el recurso hídrico que se les asocia constituye a la vez un tema
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Mentiras por omisión en la "raza blanca"
Directory of Open Access Journals (Sweden)
Ana Silvia Simesen de Bielke
2003-01-01
Full Text Available La razón instrumental blanca es hija legítima de la sociedad capitalista y, como tal, ha diseñado todos los ámbitos de la organización burocrática, el método científico, los distintos dispositivos del cuerpo social y los aparatos jurídicos e ideológicos. El reduccionismo liberticida, por ejemplo, no es un accidente epistemológico, sino que su vocación homogeneizadora ha respondido y responde a una forma particular de organización económica y política: la concepción reduccionista del mundo, la revolución industrial y la economía capitalista son los componentes filosófico, tecnológico y económico de un mismo proceso excluyente. El mismo, a través de sus avances científico-tecnológicos y su mentira civilizatoria, es quien va destruyendo paulatinamente nuestro oikos, nuestra simbiosis originaria con lo natural, nuestra sensibilidad, nuestra diversidad, únicos sustentos para la conservación de toda vida sobre el planeta. Quienes, como intelectuales, han desmontado esta estructura de la Razón Blanca falócrata colonizadora a través de sus dicotomías (humanidad y naturaleza, hombre y mujer, ciudad y pueblo, metrópolis y colonia, trabajo y vida, naturaleza y cultura, deben plantearse el imperativo moral de comprometerse con la denuncia pública acerca de este maridaje entre ciencia y fuerza, ciencia y militarismo, ciencia y patriarcado. Es el momento del desmontaje también de todas las razones descendientes de la Razón Blanca: ¿porqué no pensar también en nuestra razón académica?
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Directory of Open Access Journals (Sweden)
María Emma Santos
2016-11-01
Full Text Available En este trabajo se estima la indigencia y pobreza por ingresos en 2014 y 2015 para el total de aglomerados urbanos de Argentina y para el caso particular de Bahía Blanca, una ciudad intermedia, eminentemente industrial y comercial, con altos niveles de desempleo e indigencia recientes. Se encuentra que a mediados de 2015 una de cada diez personas estaba en situación de indigencia y casi tres de cada diez estaba en situación de pobreza, lo cual equivale a 11.6 millones de personas aproximadamente. En el caso del aglomerado de Bahía Blanca, una de cada 20 personas era indigente, y el 18% era pobre, lo cual se traduce en 15 mil y 54 mil personas en situación de indigencia y pobreza. El trabajo también expone algunos puntos críticos de la metodología de medición de pobreza por ingresos que requieren reflexión y mejoramiento en el proceso de restitución de las estadísticas oficiales de pobreza.Palabras clave: pobreza, indigencia, Argentina, Bahía Blanca.Código JEL: I32. Income Poverty in Argentina and Bahía Blanca: Reference estimates and methodological issuesAbstractIn this paper we estimate the indigence and poverty by income in 2014 and 2015 for the total urban agglomerations of Argentina and for the particular case of Bahía Blanca, an intermediate city, eminently industrial and commercial, with high levels of recent unemployment and indigence. It is found that by the middle of 2015 one in ten people was in a situation of indigence and almost three out of ten were in poverty, which is equivalent to approximately 11.6 million people. In the case of the Bahía Blanca agglomerate, one in 20 people were indigent, and 18% were poor, which translates into 15,000 and 54,000 people living in extreme poverty and poverty. The paper also presents some critical points of the methodology for measuring poverty by income that require reflection and improvement in the process of restitution of official poverty statistics.Keywords: poverty
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Lichenometry in the Cordillera Blanca, Peru: “Little Ice Age” moraine chronology
Solomina, Olga; Jomelli, Vincent; Kaser, Georg; Ames, Alcides; Berger, Bernhard; Pouyaud, Bernard
2007-10-01
This paper is a comparison and compilation of lichenometric and geomorphic studies performed by two independent teams in the Cordillera Blanca, Peru, in 1996 and 2002 on 66 "Little Ice Age" moraines of 14 glaciers. Using eleven new control points, we recalibrated the initial rapid growth phase of the previously established Rhizocarpon subgenus Rhizocarpon growth curve. This curve was then used to estimate the age of "Little Ice Age" moraines. The time of deposition of the most prominent and numerous terminal and lateral moraines on the Pacific-facing side of the Cordillera Blanca (between AD 1590 and AD 1720) corresponds to the coldest and wettest phase in the tropical Andes as revealed by ice-core data. Less prominent advances occurred between AD 1780 and 1880.
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Book Review: Game Ranch Management (Sixth Edition) | Peel ...
African Journals Online (AJOL)
Book Title: Game Ranch Management (Sixth Edition). Book Authors: J du P Bothma & J.G. du Toit (Eds.) 2016, Van Schaik Publishers, PO Box 12681, Hatfield 0028, Pretoria, South Africa 1012 pages, hardcover, eBook and ePub. ISBN: 9780627033469, 9780627033476 (eBook), 9780627034909 (ePub). Price R949.00 ...
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Landgren, Ola; Shim, Youn K; Michalek, Joel; Costello, Rene; Burton, Debra; Ketchum, Norma; Calvo, Katherine R; Caporaso, Neil; Raveche, Elizabeth; Middleton, Dan; Marti, Gerald; Vogt, Robert F
2015-11-01
Multiple myeloma has been classified as exhibiting "limited or suggestive evidence" of an association with exposure to herbicides in Vietnam War veterans. Occupational studies have shown that other pesticides (ie, insecticides, herbicides, fungicides) are associated with excess risk of multiple myeloma and its precursor state, monoclonal gammopathy of undetermined significance (MGUS); however, to our knowledge, no studies have uncovered such an association in Vietnam War veterans. To examine the relationship between MGUS and exposure to Agent Orange, including its contaminant 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), in Vietnam War veterans. This was a prospective cohort study conducted in 2013 to 2014, testing for MGUS in serum specimens collected and stored in 2002 by the Air Force Health Study (AFHS). The relevant exposure data collected by the AFHS was also used. We tested all specimens in 2013 without knowledge of the exposure status. The AFHS included former US Air Force personnel who participated in Operation Ranch Hand (Ranch Hand veterans) and other US Air Force personnel who had similar duties in Southeast Asia during the same time period (1962 to 1971) but were not involved in herbicide spray missions (comparison veterans). Agent Orange was used by the US Air Force personnel who conducted aerial spray missions of herbicides (Operation Ranch Hand) in Vietnam from 1962 to 1971. We included 479 Ranch Hand veterans and 479 comparison veterans who participated in the 2002 follow-up examination of AFHS. Agent Orange and TCDD. Serum TCDD levels were measured in 1987, 1992, 1997, and 2002. Risk of MGUS measured by prevalence, odds ratios (ORs), and 95% CIs. The 479 Ranch Hand veterans and 479 comparison veterans had similar demographic and lifestyle characteristics and medical histories. The crude prevalence of overall MGUS was 7.1% (34 of 479) in Ranch Hand veterans and 3.1% (15 of 479) in comparison veterans. This translated into a 2.4-fold increased risk
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Ranch profitability given increased precipitation variability and flexible stocking
Forage and cattle performance relationships with spring precipitation, combined with cattle market price variability, were incorporated into a ranch level model to determine if addition of a yearling enterprise to the base cow-calf herd would improve profitability with increasing (25% and 50% greate...
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Resano, M; Esteban, E; González-Pérez, E; Vía, M; Athanasiadis, G; Avena, S; Goicoechea, A; Bartomioli, M; Fernández, V; Cabrera, A; Dejean, C; Carnese, F; Moral, P
2007-01-01
The city of Bahía Blanca occupies a strategic place in Argentina south of the Pampean region in the north-east corner of the Patagonia. Since 1828, this city has been the historical and political border between Amerindian lands in the south, and the lands of European colonists. Nowadays, Bahía Blanca is an urban population mainly composed by descendents of immigrants from Spain and other European countries with apparently low admixture with Amerindians. In view of the unexpectedly high Amerindian admixture levels (about 46.7%) suggested by mtDNA data, and protein markers (19.5%), we analyzed a set of 19 Alu polymorphisms (18 autosomal, 1 of Chromosome Y) in a well-documented genealogical sample from Bahía Blanca. The genotyped sample was made up of 119 unrelated healthy individuals whose birth place and grandparent origins were fully documented. According to available genealogical records, the total sample has been subdivided into two groups: Bahía Blanca Original (64 individuals with all 4 gandparents born in Argentina) and Bahía Blanca Mix (55 individuals with one to three grandparents born out of Argentina). Allele frequencies and gene diversity values in Bahía Blanca fit well into the European ranges. Population relationships have been tested for 8 Alu markers, whose variation has been described in several Amerindian and European samples. Reynolds genetic distances underline the significant genetic similarity of Bahía Blanca to Europeans (mean distance 0.044) and their differentiation from Amerindians (0.146). Interestingly enough, when the general sample is divided, Bahía Blanca Original appears slightly closer to Amerindians (0.127) in contrast to Bahía Blanca Mix (0.161). Furthermore, the genetic relationships depicted through a principal components analysis emphasize the relative similarity of Bahía Blanca Original to Amerindians. A thorough knowledge of the sample origins has allowed us to make a subtle distinction of the genetic composition of
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Richness of mammals on the San Bernardino Ranch in the municipality of Agua Prieta, Sonora, Mexico
Mario Erandi Bonillas-Monge; Carlos Manuel Valdez-Coronel
2013-01-01
Historically, the San Bernardino Ranch has performed, as economical activities, livestock and farming, which has contributed to the deterioration of regional ecosystems. The ranch is ecologically important due to the diverse types of habitats of conservation interest such as the semi-desert grassland, the riparian vegetation, and a large ciénega, in which restoration...
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78 FR 41795 - Farm, Ranch, and Rural Communities Committee Teleconference
2013-07-11
... Communities Committee Teleconference AGENCY: Environmental Protection Agency (EPA). ACTION: Notice of Public..., EPA gives notice of a teleconference meeting of the Farm, Ranch, and Rural Communities Committee (FRRCC). The FRRCC is a policy-oriented committee that provides policy advice, information, and...
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Forrest Ranch Management and Implementation, Annual Report 2002-2003.
Energy Technology Data Exchange (ETDEWEB)
Smith, Brent
2004-01-01
Through their John Day Basin Office, the Confederated Tribes of Warm Springs Reservation of Oregon (Tribes) acquired the Forrest Ranch during July of 2002. The property consists of two parcels located in the John Day subbasin within the Columbia basin. The mainstem parcel consists of 3,503 acres and is located 1/2 mile to the east of Prairie City, Oregon on the mainstem of the John Day River. The middle fork parcel consists of 820 acres and is located one mile to the west of the town of Austin, OR on the middle fork John Day River. The Forrest Ranch Project is under a memorandum of agreement with the Bonneville Power Administration (BPA) to provide an annual written report generally describing the real property interests of the project and management activities undertaken or in progress. The Forrest Ranch acquisition was funded by BPA as part of their program to protect, mitigate, and enhance fish and wildlife habitat affected by the operation of their hydroelectric facilities on the Columbia River and its tributaries. Following lengthy negotiations with the BPA and property owner, the Tribes were able to conclude the acquisition of the Forrest Ranch in July of 2002. The intent of the acquisition project was to partially mitigate fish and wildlife impacts for the John Day Dam on the Columbia River as outlined in the Northwest Power Planning Council's Wildlife Program (NPPC 1994, section 11.1, section 7.6). While the Tribes hold fee-title to the property, the BPA has assured a level of program funding through a memorandum of agreement and annual statement of work. As early as 1997, the Tribes identified this property as a priority for restoration in the John Day basin. In 2000, the Tribes arranged an agreement with the landowner to seek funds for the acquisition of both the Middle Fork and upper Mainstem John Day River holdings of Mr. John Forrest. This property had been a priority of not only the Tribes, but of many other basin natural resource agencies. The
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REGIONAL HYDROLOGY OF THE NOPAL I SITE, SIERRA DE PENA BLANCA, CHIHUAHUA, MEXICO
Energy Technology Data Exchange (ETDEWEB)
J.A. Rodriguez-Pineda; P. Goodell; P.F. Dobson; J. Walton; R. Oliver; De La Garza; S. Harder
2005-07-11
The U.S. Department of Energy sponsored the drilling of three wells in 2003 near the Nopal I uranium deposit at the Sierra Pena Blanca, Chihuahua, Mexico. Piezometric information is being collected to understand groundwater flow at local and regional levels as part of an ongoing natural analogue study of radionuclide migration. Water level monitoring reported at these and other wells in the region is combined with archival data to provide a better understanding of the hydrology at Nopal I. Initial results suggest that the local hydrology is dependent on the regional hydrologic setting and that this groundwater system behaves as an unconfined aquifer. The region is dominated by an alternating sequence of highlands and basins that step down from west to east. The Sierra de Pena Blanca was downdropped from the cratonic block to the west during Cenozoic extension. The Nopal I area is near the intersection of two large listric faults, and the questa of ash flow tuffs that hosts the deposit has been subjected to complex structural events. The Pena Blanca Uranium District was originally characterized by 105 airborne radiometric anomalies, indicating widespread uranium mineralization. The Nopal I uranium deposit is located in the Sierra del Pena Blanca between the Encinillas Basin to the west, with a mean elevation of 1560 m, and the El Cuervo Basin to the east, with a mean elevation of 1230 m. The Nopal I + 10 level is at an intermediate elevation of 1463 m, with a corresponding groundwater elevation of approximately 1240 m. The regional potentiometric surface indicates flow from west to east, with the El Cuervo Basin being the discharge zone for the regional flow system. However, it appears that the local groundwater potential beneath the Nopal I site is more in accordance with the water table of the El Cuervo Basin than with that of the Encinillas Basin. This might indicate that there is limited groundwater flow between the Encinillas Basin and the Nopal I area.
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REGIONAL HYDROLOGY OF THE NOPAL I SITE, SIERRA DE PENA BLANCA, CHIHUAHUA, MEXICO
International Nuclear Information System (INIS)
Rodriguez-Pineda, J.A.; Goodell, P.; Dobson, P.F.; Walton, J.; Oliver, R.; De La Garza; Harder, S.
2005-01-01
The U.S. Department of Energy sponsored the drilling of three wells in 2003 near the Nopal I uranium deposit at the Sierra Pena Blanca, Chihuahua, Mexico. Piezometric information is being collected to understand groundwater flow at local and regional levels as part of an ongoing natural analogue study of radionuclide migration. Water level monitoring reported at these and other wells in the region is combined with archival data to provide a better understanding of the hydrology at Nopal I. Initial results suggest that the local hydrology is dependent on the regional hydrologic setting and that this groundwater system behaves as an unconfined aquifer. The region is dominated by an alternating sequence of highlands and basins that step down from west to east. The Sierra de Pena Blanca was downdropped from the cratonic block to the west during Cenozoic extension. The Nopal I area is near the intersection of two large listric faults, and the questa of ash flow tuffs that hosts the deposit has been subjected to complex structural events. The Pena Blanca Uranium District was originally characterized by 105 airborne radiometric anomalies, indicating widespread uranium mineralization. The Nopal I uranium deposit is located in the Sierra del Pena Blanca between the Encinillas Basin to the west, with a mean elevation of 1560 m, and the El Cuervo Basin to the east, with a mean elevation of 1230 m. The Nopal I + 10 level is at an intermediate elevation of 1463 m, with a corresponding groundwater elevation of approximately 1240 m. The regional potentiometric surface indicates flow from west to east, with the El Cuervo Basin being the discharge zone for the regional flow system. However, it appears that the local groundwater potential beneath the Nopal I site is more in accordance with the water table of the El Cuervo Basin than with that of the Encinillas Basin. This might indicate that there is limited groundwater flow between the Encinillas Basin and the Nopal I area
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2012-11-26
... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [Docket No. DI13-2-000] Bar None Ranch LLC; Notice of Declaration of Intention and Soliciting Comments, Protests, and/or Motions To Intervene...: November 2, 2012. d. Applicant: Bar None Ranch LLC. e. Name of Project: Snodgrass Springs Micro Hydro...
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International Nuclear Information System (INIS)
Larry Lawrence; Bruce Miller
2004-01-01
The Lott Ranch 3D seismic prospect located in Garza County, Texas is a project initiated in September of 1991 by the J.M. Huber Corp., a petroleum exploration and production company. By today's standards the 126 square mile project does not seem monumental, however at the time it was conceived it was the most intensive land 3D project ever attempted. Acquisition began in September of 1991 utilizing GEO-SEISMIC, INC., a seismic data contractor. The field parameters were selected by J.M. Huber, and were of a radical design. The recording instruments used were GeoCor IV amplifiers designed by Geosystems Inc., which record the data in signed bit format. It would not have been practical, if not impossible, to have processed the entire raw volume with the tools available at that time. The end result was a dataset that was thought to have little utility due to difficulties in processing the field data. In 1997, Yates Energy Corp. located in Roswell, New Mexico, formed a partnership to further develop the project. Through discussions and meetings with Pinnacle Seismic, it was determined that the original Lott Ranch 3D volume could be vastly improved upon reprocessing. Pinnacle Seismic had shown the viability of improving field-summed signed bit data on smaller 2D and 3D projects. Yates contracted Pinnacle Seismic Ltd. to perform the reprocessing. This project was initiated with high resolution being a priority. Much of the potential resolution was lost through the initial summing of the field data. Modern computers that are now being utilized have tremendous speed and storage capacities that were cost prohibitive when this data was initially processed. Software updates and capabilities offer a variety of quality control and statics resolution, which are pertinent to the Lott Ranch project. The reprocessing effort was very successful. The resulting processed data-set was then interpreted using modern PC-based interpretation and mapping software. Production data, log data
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Productivity of Indigenous and Exotic Cattle on Kenya Ranches ...
African Journals Online (AJOL)
A comparison of productivity and adaptability of indigenous (Boran and Small East African Zebu) and the exotic (Sahiwal and Ayrshire) cattle on Kenyan ranches located in semi-arid areas of the Rift Valley Provinces was done. Data sets of the cattle breeds over the 1979-1993 period on Deloraine, Elkarama, Ilkerin, ...
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A Critique of the Green Economy: Approach in the Wildlife Ranching ...
African Journals Online (AJOL)
AFRICAN JOURNALS ONLINE (AJOL) · Journals · Advanced Search ... wildlife ranching in South Africa are socially constructed through language. Discourses of game farmers' identity and practice illustrate that they use language as a critical ...
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2011-07-29
... DEPARTMENT OF THE INTERIOR Fish and Wildlife Service [FWS-R8-ES-2011-N144; 81440-1113-0000-F3] Proposed Safe Harbor Agreement for California Red-Legged Frog, at Swallow Creek Ranch, San Luis Obispo... Ranch in San Luis Obispo County, California. Within the 620 acres of land comprising the Enrolled...
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[Aquatic insects and water quality in Peñas Blancas watershed and reservoir].
Mora, Meyer Guevara
2011-06-01
The aquatic insects have been used to evaluate water quality of aquatic environments. The population of aquatic insects and the water quality of the area were characterized according to the natural and human alterations present in the study site. During the monthly-survey, pH, DO, temperature, water level, DBO, PO4 and NO3 were measured. Biological indexes (abundance, species richness and the BMWP-CR) were used to evaluate the water quality. No relation between environmental and aquatic insects was detected. Temporal and spatial differences attributed to the flow events (temporal) and the presence of Peñas Blancas reservoir (spatial). In the future, the investigations in Peñas Blancas watershed need to be focused on determining the real influence of the flows, sediment release and the possible water quality degradation because of agriculture activities.
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2006 Southwest Florida Water Management District (SWFWMD) Lidar: Rutland Ranch District
National Oceanic and Atmospheric Administration, Department of Commerce — The Light Detection and Ranging (LiDAR) LAS dataset is a survey of select areas within Rutland Ranch. This data falls in Manatee County. These data were produced for...
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77 FR 71396 - Council for Native American Farming and Ranching
2012-11-30
... American Farming and Ranching (CNAFR) a public advisory committee of the Office of Tribal Relations (OTR... documents other than rules #0;or proposed rules that are applicable to the public. Notices of hearings #0..., filing of petitions and applications and agency #0;statements of organization and functions are examples...
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Directory of Open Access Journals (Sweden)
Gloria Lapeña-Gallego
2017-01-01
Full Text Available A través de la Memoria Histórica, la Historia con mayúsculas se ha convertido en una fuente inagotable para narrar grandes historias con minúscula. De manera paralela, el paso de una cultura eminentemente letrada a otra más visual con predominio de la imagen ha favorecido la progresiva incorporación en el ámbito educativo de fuentes procedentes de la cultura popular, cuyos autores se aproximan al hecho histórico desde una perspectiva más íntima y reflexiva. En el presente artículo se fundamenta el potencial del álbum ilustrado como fórmula narrativa complementaria al manual escolar o libro de texto de Historia, especialmente en el tratamiento de temas complejos y delicados, como el holocausto nazi. Además, se propone un modelo de análisis que tiene en cuenta las particularidades de este género artístico en la construcción de la historiografía por medio de la incorporación de imágenes que van más allá de ser una redundancia o aclaración del texto. Para el cumplimiento de ambos objetivos, una vez analizado la concepción actual de la narración histórica, se estudia en detalle el álbum Rosa Blanca, contextualizado en la ocupación nazi durante la Segunda Guerra Mundial.
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Israel Fernando Castillo-López; Rubén Cornelio Montes-Pérez; Carlos Eduardo Rodríguez-Molano
2011-01-01
El venado cola blanca (Odocoileus virginianus.Zimmermann) es uno de los recursos silvestres y cinegéticos más importantes en México. Sin embargo, los estudios que existen sobre su crianza en cautiverio son insuficientes para optimizar su producción. El objetivo planteado en este trabajo fue evaluar la preferencia relativa de cuatro forrajes, comparar el consumo ad libitum del forraje nativo preferido contra un pasto de corte, en venados cola blanca mantenidos en cautiverio...
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Energy Technology Data Exchange (ETDEWEB)
1979-02-01
Impacts from Morton Ranch Uranium Mill will result in: alterations of up to 270 acres occupied by the mill facilities; increase in the existing background radiation levels; socioeconomic effects on Glenrock and Douglas, Wyoming. Solid waste material (tailings solids) from the mill will be deposited onsite in exhausted surface mine pits. Any license issued for the Morton Ranch mill will be subject to conditions for the protection of the environment.
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International Nuclear Information System (INIS)
1979-02-01
Impacts from Morton Ranch Uranium Mill will result in: alterations of up to 270 acres occupied by the mill facilities; increase in the existing background radiation levels; socioeconomic effects on Glenrock and Douglas, Wyoming. Solid waste material (tailings solids) from the mill will be deposited onsite in exhausted surface mine pits. Any license issued for the Morton Ranch mill will be subject to conditions for the protection of the environment
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2012-10-05
...; EL12-43-000, EL12-43-001 TGP Granada, LLC and Roosevelt Wind Ranch, LLC v. Public Service Company of New Mexico, Tortoise Capital Resources Corp.; TGP Granada, LLC and Roosevelt Wind Ranch, LLC; Notice... over capacity on the Eastern Interconnection Project. \\1\\ TGP Granada, LLC v. Pub. Serv. Co. of New...
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The Downstream Fate of Glacial Runoff and Groundwater in the Cordillera Blanca, Peru
McKenzie, J. M.; Gordon, R.; Chavez, D.; Maharaj, L.; Baraer, M.; Mark, B. G.; Lautz, L. K.
2013-12-01
Rapid glacier recession in the Cordillera Blanca, Peru, is raising concerns about current and future water resources for the inhabitants of the Rio Santa watershed. Glacier meltwater buffers stream discharge throughout the range, reducing the variability of annual runoff and maintaining stream flows during the dry season. Groundwater is also an important component of dry season runoff as it can contribute as much as 50-70% to outflow in some Rio Santa tributaries. A better understanding of groundwater dynamics in high elevation watersheds is needed, including quantification of recharge, subsurface processes, and available storage. We present the results from recent groundwater studies in the Cordillera Blanca where numerous investigative techniques have been used, including ground penetrating radar, hydraulic conductivity measurements, tracer tests, and hydrochemical mixing models. Our research focuses primarily on the low-relief pampa valley floors across which glacial-melt derived rivers flow. Across the Cordillera, these valley systems cover approximately 65 km2 and are comprised of unconsolidated glacial, talus, and lacustrine deposits and wetlands. The valleys commonly have buried, permeable, talus aquifers that are overlain by relatively impermeable, glaciolacustrine deposits. Glaciofluvial outwash deposits also act as aquifers (hydraulic conductivity of 10-4 m/s). The travel time of water stored in these systems is generally less than 3-4 years and the maximum observed dry season groundwater velocity is 60 cm/day. While groundwater represents an important component of dry season water resources source of water in the Cordillera Blanca, it is also potentially vulnerable to climate change including changes in the precipitation regime and decrease in glacially derived recharge.
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Glacial lake outburst floods in the area of Huarás, Cordillera Blanca, Peru
Czech Academy of Sciences Publication Activity Database
Vilímek, V.; Zapata, M. L.; Klimeš, Jan
2005-01-01
Roč. 39, - (2005), s. 115-124 ISSN 0081-6434 Grant - others:GA MŠk(CZ) LA 157 Institutional research plan: CEZ:AV0Z30460519 Keywords : GLOFs * Cordillera Blanca * Peru Subject RIV: DC - Siesmology, Volcanology, Earth Structure
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Avian response to pine restoration at Peck Ranch Conservation Area
Richard Clawson; Carrie Steen; Kim Houf; Terry Thompson
2007-01-01
Midco Pine Flats is a 2,223-acre region of Peck Ranch Conservation Area (CA) that is classified as a pine-oak plains land type association. Extensive logging in the early 1900s removed most overstory shortleaf pine allowing oak to become the primary overstory component. In 2000, Missouri Department of Conservation staff initiated a pineoak woodland restoration project...
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Cultural Resource Survey Report. Hildebrand Ranch Area: Proposed Chatfield Arboretum.
1981-05-01
stabilization and attic re- pair General Purpose Shed X X Chicken Coop X X Carriage Shed X x Corrals and Fences X X Grape Arbor x Inventory of Buildings and Fact...area of about 350 acres and included the en- tire ranch except for the areas of ground occupied by buildings and parking lots. The area along Deer
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Proyecto de producción y comercialización de compota de zanahoria blanca en la ciudad de Guayaquil
Cedeño Cáceres, Karla Paola; Quimí Lino, Manuel Enrique; Rivera Flores, Stalin
2013-01-01
El proyecto a emprender se encuentra enfocado en la elaboración y producción de la compota de zanahoria blanca en la ciudad de Guayaquil, teniendo como materia prima la zanahoria blanca, que con sus propiedades nutritivas aún desconocida por muchos, esta cuenta con un gran valor nutricional el cual con nuestro proyecto pretendemos dar a conocer, de modo que podemos aprovechar la ventaja de que aún no existe en el mercado un producto con estas características. Este sería un prod...
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Energy Technology Data Exchange (ETDEWEB)
Teich-McGoldrick, Stephanie [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Ilgen, Anastasia Gennadyevna [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Dwyer, Brian P. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Rigali, Mark J. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Stewart, Thomas Austin [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
2014-12-01
This report summarizes the assistance provided to Shafer Ranches, Inc., Hightower Ranch, and Western Environmental by Sandia National Laboratories under a Leveraged New Mexico Small Business Assistance grant. The work was conducted between April to November, 2014. Therefore, Sandia National Laboratories has been asked to investigate and develop a water treatment system that would result in reduced cost associated with infrastructure, maintenance, elimination of importing water, and improved cattle health.
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Passive solar ranch house for the mass market
Energy Technology Data Exchange (ETDEWEB)
Albanes, M.N.
1981-01-01
To promote the building of passive solar housing in the Denver metropolitan area, a solar ranch style house was designed for a builder, Unique Homes, as part of a group of thirteen passive solar houses built for the mass market under SERI's Denver Metro Home Builders Program. The project, process of design, thermal performance analysis, cost and consumer/media response are reviewed. The final design was a direct gain, attached greenhouse system that used brick as interior mass.
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Energy Technology Data Exchange (ETDEWEB)
Hirsch, Matthew; Krause, Matthias B.
2013-03-15
Landlady Kate Kennedy wanted to build her property in a conservation area three hours' drive south of San Francisco in a ranch-style house. Architect Jonathan Feldman added energy-efficient elements and a roof-integrated photovoltaic system to the project. Kennedy now produces more electricity than it can consume. [German] Hausherrin Kate Kennedy wollte ihr Anwesen in einem Naturschutzgebiet drei Autostunden suedlich von San Francisco unbedingt im Stil eines Ranch-Hauses bauen. Architekt Jonathan Feldman fuegte dem Projekt energieeffiziente Elemente und eine dachintegrierte Photovoltaikanlage hinzu. Nun produziert Kennedy mehr Solarstrom, als sie verbrauchen kann.
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Directory of Open Access Journals (Sweden)
Lourdes Gallego-Calvo
2015-12-01
Full Text Available Interest in the preservation of endangered breeds such as the Blanca Andaluza goat, has increased and some steps should be therefore taken to ensure it. The study was designed to determine the seasonal reproductive pattern of Blanca Andaluza bucks, and whether this affects the quality of their semen and its freezability over the year. Seven bucks were used and their body weight, testicular weight, plasma testosterone concentration and fresh sperm quality determined every week. The collected sperm was cryopreserved and stored; it was then thawed and the same sperm quality variables measured every fortnight. High plasma testosterone concentrations were recorded during the summer and autumn, and low concentrations were recorded during winter and spring (p<0.001. No differences were seen between seasons in terms of the percentage of bucks ejaculating, the percentage of active bucks, or ejaculate volume. However, the sperm concentration, the total number of sperm per ejaculate, and the values for most fresh sperm variables were lower during the winter period (at least p<0.05. After freezing-thawing, the quality of winter-collected sperm was better, in some respects, than that of summer-collected sperm (at least p<0.05. These results reveal that Blanca Andaluza bucks show seasonal reproductive activity in terms of their plasma testosterone concentration, but no clear change in their sexual behaviour between seasons was observed. The values of fresh sperm variables also vary over the year, reaching their lowest during winter. However, after freezing-thawing, winter-collected sperm is of overall better quality than sperm collected during the summer.
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Energy Technology Data Exchange (ETDEWEB)
Gallego-Calvo, L.; Gatica, M.C.; Santiago-Moreno, J.; Guzmán, J.L.; Zarazaga, L.
2015-07-01
Interest in the preservation of endangered breeds such as the Blanca Andaluza goat, has increased and some steps should be therefore taken to ensure it. The study was designed to determine the seasonal reproductive pattern of Blanca Andaluza bucks, and whether this affects the quality of their semen and its freezability over the year. Seven bucks were used and their body weight, testicular weight, plasma testosterone concentration and fresh sperm quality determined every week. The collected sperm was cryopreserved and stored; it was then thawed and the same sperm quality variables measured every fortnight. High plasma testosterone concentrations were recorded during the summer and autumn, and low concentrations were recorded during winter and spring (p<0.001). No differences were seen between seasons in terms of the percentage of bucks ejaculating, the percentage of active bucks, or ejaculate volume. However, the sperm concentration, the total number of sperm per ejaculate, and the values for most fresh sperm variables were lower during the winter period (at least p<0.05). After freezing-thawing, the quality of winter-collected sperm was better, in some respects, than that of summer-collected sperm (at least p<0.05). These results reveal that Blanca Andaluza bucks show seasonal reproductive activity in terms of their plasma testosterone concentration, but no clear change in their sexual behaviour between seasons was observed. The values of fresh sperm variables also vary over the year, reaching their lowest during winter. However, after freezing-thawing, winter-collected sperm is of overall better quality than sperm collected during the summer. (Author)
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Long-term surveillance plan for the Collins Ranch Disposal Site, Lakeview, Oregon
International Nuclear Information System (INIS)
1993-12-01
This long-term surveillance plan (LTSP) for the Lakeview, Oregon, Uranium Mill Tailings Remedial Action (UMTRA) Project disposal site describes the surveillance activities for the Lakeview (Collins Ranch) disposal cell, which will be referred to as the Collins Ranch disposal cell throughout this document. The US Department of Energy (DOE) will carry out these activities to ensure that the disposal cell continues to function as designed. This final LTSP was prepared as a requirement for acceptance under the US Nuclear Regulatory Commission (NRC) general license for custody and long-term care of residual radioactive materials. This LTSP documents whether the land and interests are owned by the United States or an Indian tribe, and details how the long-term care of the disposal site will be carried out. It is based on the DOE's Guidance for Implementing the UMTRA Project Long-term Surveillance Program (DOE, 1992a)
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Directory of Open Access Journals (Sweden)
Nazaré Costa
2009-01-01
Full Text Available El objetivo de este estudio fue comparar los casos de mujeres blancas y negras víctimas de la violencia de pareja en el nordeste de Brasil, así como determinar las diferencias de abuso dentro del marco de una relación de pareja en función de diversas variables sociodemográficas. Una muestra de 386 mujeres (183 blancas y 203 negras con relación de pareja heterosexual desde hacía al menos seis meses contestó al Index of Spouse Abuse. Los resultados encontrados permiten concluir que las mujeres de raza negra sufren más abusos en su relación de pareja que las blancas, y que la edad, el nivel educativo, la ocupación, la práctica religiosa y la ideología política no se relacionan con la frecuencia de abuso físico y no físico.
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Pine Creek Ranch, FY 2001 Annual Report.
Energy Technology Data Exchange (ETDEWEB)
Berry, Mark E.
2001-11-01
Pine Creek Ranch was purchased in 1999 by the Confederated Tribes of Warm Springs using Bonneville Power Administration Fish and Wildlife Habitat Mitigation funds. The 25,000 acre property will be managed in perpetuity for the benefit of fish and wildlife habitat. Major issues include: (1) Restoring quality spawning and rearing habitat for stealhead. Streams are incised and fish passage barriers exist from culverts and possibly beaver dams. In addition to stealhead habitat, the Tribes are interested in overall riparian recovery in the John Day River system for wildlife habitat, watershed values and other values such as recreation. (2) Future grazing for specific management purposes. Past grazing practices undoubtedly contributed to current unacceptable conditions. The main stem of Pine Creek has already been enrolled in the CREP program administered by the USDA, Natural Resource Conservation Service in part because of the cost-share for vegetation restoration in a buffer portion of old fields and in part because of rental fees that will help the Tribes to pay the property taxes. Grazing is not allowed in the riparian buffer for the term of the contract. (3) Noxious weeds are a major concern. (4) Encroachment by western juniper throughout the watershed is a potential concern for the hydrology of the creek. Mark Berry, Habitat Manager, for the Pine Creek Ranch requested the Team to address the following objectives: (1) Introduce some of the field staff and others to Proper Functioning Condition (PFC) assessments and concepts. (2) Do a PFC assessment on approximately 10 miles of Pine Creek. (3) Offer management recommendations. (4) Provide guidelines for monitoring.
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Bird list of San Bernardino Ranch in Agua Prieta, Sonora, Mexico
Melinda Cardenas-Garcia; Monica C. Olguin-Villa
2013-01-01
Interest and investigation of birds has been increasing over the last decades due to the loss of their habitats, and declination and fragmentation of their populations. San Bernardino Ranch is located in the desert grassland region of northeastern Sonora, México. Over the last decade, restoration efforts have tried to address the effects of long deteriorating economic...
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Coiled-tubing fracturing of coal seams on the Vermejo Park Ranch
Energy Technology Data Exchange (ETDEWEB)
Bybee, K.
2003-06-01
Coiled-tubing (CT) fracturing currently is used to stimulate the Vermejo and Raton coal seams on the Vermejo Park Ranch in northern New Mexico. The CT fracturing process increased the number of stimulation stages from 4 to 18 per well. CT fracturing results in more accurate proppant placement and more effective stimulation of the producing zones.
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Farm Management Basic Core Curriculum. Kansas Postsecondary Farm and Ranch Management Project.
Albracht, James, Ed.
Thirty-five units of instruction are included in this core curriculum in farm management for postsecondary farm and ranch management programs. Units of instruction are divided into 12 instructional areas: (1) Introduction to Financial Management, (2) Farm Business Arrangement, (3) Credit Management, (4) Budgeting, (5) Recordkeeping, (6) Record…
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Eco-friendly porous concrete using bottom ash aggregate for marine ranch application.
Lee, Byung Jae; Prabhu, G Ganesh; Lee, Bong Chun; Kim, Yun Yong
2016-03-01
This article presents the test results of an investigation carried out on the reuse of coal bottom ash aggregate as a substitute material for coarse aggregate in porous concrete production for marine ranch applications. The experimental parameters were the rate of bottom ash aggregate substitution (30%, 50% and 100%) and the target void ratio (15%, 20% and 25%). The cement-coated granular fertiliser was substituted into a bottom ash aggregate concrete mixture to improve marine ranch applications. The results of leaching tests revealed that the bottom ash aggregate has only a negligible amount of the ten deleterious substances specified in the Ministry of Environment - Enforcement Regulation of the Waste Management Act of Republic Korea. The large amount of bubbles/air gaps in the bottom ash aggregate increased the voids of the concrete mixtures in all target void ratios, and decreased the compressive strength of the porous concrete mixture; however, the mixture substituted with 30% and 10% of bottom ash aggregate and granular fertiliser, respectively, showed an equal strength to the control mixture. The sea water resistibility of the bottom ash aggregate substituted mixture was relatively equal to that of the control mixture, and also showed a great deal of improvement in the degree of marine organism adhesion compared with the control mixture. No fatality of fish was observed in the fish toxicity test, which suggested that bottom ash aggregate was a harmless material and that the combination of bottom ash aggregate and granular fertiliser with substitution rates of 30% and 10%, respectively, can be effectively used in porous concrete production for marine ranch application. © The Author(s) 2015.
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Glas, R. L.; Lautz, L.; McKenzie, J. M.; Baker, E. A.; Somers, L. D.; Aubry-Wake, C.; Wigmore, O.; Mark, B. G.; Moucha, R.
2016-12-01
Groundwater- surface water interactions in alpine catchments are often poorly understood as groundwater and hydrologic data are difficult to acquire in these remote areas. The Cordillera Blanca of Peru is a region where dry-season water supply is increasingly stressed due to the accelerated melting of glaciers throughout the range, affecting millions of people country-wide. The alpine valleys of the Cordillera Blanca have shown potential for significant groundwater storage and discharge to valley streams, which could buffer the dry-season variability of streamflow throughout the watershed as glaciers continue to recede. Known as pampas, the clay-rich, low-relief valley bottoms are interfingered with talus deposits, providing a likely pathway for groundwater recharged at the valley edges to be stored and slowly released to the stream throughout the year by springs. Multiple geophysical methods were used to determine areas of groundwater recharge and discharge as well as aquifer geometry of the pampa system. Seismic refraction tomography, vertical electrical sounding (VES), electrical resistivity tomography (ERT), and horizontal-to-vertical spectral ratio (HVSR) seismic methods were used to determine the physical properties of the unconsolidated valley sediments, the depth to saturation, and the depth to bedrock for a representative section of the Quilcayhuanca Valley in the Cordillera Blanca. Depth to saturation and lithological boundaries were constrained by comparing geophysical results to continuous records of water levels and sediment core logs from a network of seven piezometers installed to depths of up to 6 m. Preliminary results show an average depth to bedrock for the study area of 25 m, which varies spatially along with water table depths across the valley. The conceptual model of groundwater flow and storage derived from these geophysical data will be used to inform future groundwater flow models of the area, allowing for the prediction of groundwater
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Hofer, M.; Kaser, G.; Mölg, T.; Juen, I.; Wagnon, P.
2009-04-01
Glaciers in the outer tropical Cordillera Blanca (Peru, South America) are of major socio-economic importance, since glacier runoff represents the primary water source during the dry season, when little or no rainfall occurs. Due to their location at high elevations, the glaciers moreover provide important information about climate change in the tropical troposphere, where measurements are sparse. This study targets the local reconstruction of air temperature, specific humidity and wind speed above the surface of an outer tropical glacier from NCEP/NCAR reanalysis data as large scale predictors. Since a farther scope is to provide input data for process based glacier mass balance modelling, the reconstruction pursues a high temporal resolution. Hence an empirical downscaling scheme is developed, based on a few years' time series of hourly observations from automatic weather stations, located at the glacier Artesonraju and nearby moraines (Northern Cordillera Blanca). Principal component and multiple regression analyses are applied to define the appropriate spatial downscaling domain, suitable predictor variables, and the statistical transfer functions. The model performance is verified using an independent data set. The best predictors are lower tropospheric air temperature and specific humidity, at reanalysis model grid points that represent the Bolivian Altiplano, located in the South of the Cordillera Blanca. The developed downscaling model explaines a considerable portion (more than 60%) of the diurnal variance of air temperature and specific humidity at the moraine stations, and air temperature above the glacier surface. Specific humidity above the glacier surface, however, can be reconstructed well in the seasonal, but not in the required diurnal time resolution. Wind speed can only be poorly determined by the large scale predictors (r² lower than 0.3) at both sites. We assume a complex local interaction between valley and glacier wind system to be the main
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Vascular plants and a brief history of the Kiowa and Rita Blanca National Grasslands
Donald L. Hazlett; Michael H. Schiebout; Paulette L. Ford
2009-01-01
Administered by the USDA Forest Service, the Kiowa and Rita Blanca National Grasslands occupy 230,000 acres of public land extending from northeastern New Mexico into the panhandles of Oklahoma and Texas. A mosaic of topographic features including canyons, plateaus, rolling grasslands and outcrops supports a diverse flora. Eight hundred twenty six (826) species of...
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Feasibility Study for Paragon - Bisti Solar Ranch
Energy Technology Data Exchange (ETDEWEB)
Benally, Thomas [Navajo Hopi Land Commission Office (NHLCO), Window Rock, AZ (United States)
2015-06-01
The Navajo Hopi Land Commission Office (NHLCO) and Navajo Nation (NN) plan to develop renewable energy (RE) projects on the Paragon-Bisti Ranch (PBR) lands, set aside under the Navajo Hopi Land Settlement Act (NHLSA) for the benefit of Relocatees. This feasibility study (FS), which was funded under a grant from DOE’s Tribal Energy Program (TEP), was prepared in order to explore the development of the 22,000-acre PBR in northwestern New Mexico for solar energy facilities. Topics covered include: • Site Selection • Analysis of RE, and a Preliminary Design • Transmission, Interconnection Concerns and Export Markets • Financial and Economic Analysis • Environmental Study • Socioeconomic and Cultural Factors • Next Steps.
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Potenciální nebezpečnost vybraných morénami hrazených jezer v pohoří Cordillera Blanca, Peru
Emmer, Adam
2013-01-01
Adam Emmer: Potential hazardousness of selected moraine-dammed lakes in the Cordillera Blanca, Peru ABSTRACT: This work is devided into the two parts. Firs part reviews contemporary methods of assessment of potential hazardousness for moraine-dammed lakes (eight qualitative methods and three quantitative methods). Second part has two main aims: 1) Assessment of potential hazardousness of seven selected moraine-dammed lakes in the Cordillera Blanca, and 2) Analysis of suitability of these meth...
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Czech Academy of Sciences Publication Activity Database
Klimeš, Jan; Vilímek, V.; Benešová, M.
2015-01-01
Roč. 50, č. 2 (2015), s. 173-180 ISSN 0300-5402 R&D Projects: GA ČR(CZ) GAP209/11/1000 Institutional support: RVO:67985891 Keywords : landslide hazard * GLOFs * flood hazard * Cordillera Blanca * Peru Subject RIV: DE - Earth Magnetism, Geodesy, Geography
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Pine Creek Ranch, FY 2001 annual report; ANNUAL
International Nuclear Information System (INIS)
Berry, Mark E.
2001-01-01
Pine Creek Ranch was purchased in 1999 by the Confederated Tribes of Warm Springs using Bonneville Power Administration Fish and Wildlife Habitat Mitigation funds. The 25,000 acre property will be managed in perpetuity for the benefit of fish and wildlife habitat. Major issues include: (1) Restoring quality spawning and rearing habitat for stealhead. Streams are incised and fish passage barriers exist from culverts and possibly beaver dams. In addition to stealhead habitat, the Tribes are interested in overall riparian recovery in the John Day River system for wildlife habitat, watershed values and other values such as recreation. (2) Future grazing for specific management purposes. Past grazing practices undoubtedly contributed to current unacceptable conditions. The main stem of Pine Creek has already been enrolled in the CREP program administered by the USDA, Natural Resource Conservation Service in part because of the cost-share for vegetation restoration in a buffer portion of old fields and in part because of rental fees that will help the Tribes to pay the property taxes. Grazing is not allowed in the riparian buffer for the term of the contract. (3) Noxious weeds are a major concern. (4) Encroachment by western juniper throughout the watershed is a potential concern for the hydrology of the creek. Mark Berry, Habitat Manager, for the Pine Creek Ranch requested the Team to address the following objectives: (1) Introduce some of the field staff and others to Proper Functioning Condition (PFC) assessments and concepts. (2) Do a PFC assessment on approximately 10 miles of Pine Creek. (3) Offer management recommendations. (4) Provide guidelines for monitoring
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International Nuclear Information System (INIS)
French, D.C.; Anthony, E.Y.; Goodell, P.C.
2005-01-01
The Pena Blanca natural analog is located in the Sierra Pena Blanca, approximately 50 miles north of Chihuahua City, Mexico. The Sierra Pena Blanca is composed mainly of ash-flow tuffs, and the uranium in the region is contained in the brecciated zones of these tuffs. The Pena Blanca site is considered a natural analog to the proposed Yucca Mountain Nuclear Waste Repository because they share similar characteristics of structure, volcanic lithology, tectonic activity, and hydrologic regime. One of the mineralized zones, the Nopal I deposit, was mined in the early 1980s and the ore was stockpiled close to the mine. This stockpile area has subsequently been cleared and is referred to as the prior high-grade stockpile (PHGS) site. Soil surrounding boulders of high-grade ore associated with the PHGS site have been sampled. The purpose of this study is to characterize the transport of uranium series radioisotopes from the boulder to the soil during the past 25 years. Transport is characterized by determining the activities of individual radionuclides and daughter to parent ratios. The daughter to parent ratios are used to establish whether the samples are in secular equilibrium. Activities are determined using gamma-ray spectroscopy. Isotopes of the uranium series decay chain detected by gamma-ray spectroscopy include 210 Pb, 234 U, 234 Th, 230 Th, 226 Ra, 214 Pb, 214 Bi, and 234 Pa. Preliminary results indicate that some daughter to parent pairs appear to be in secular disequilibrium. Thorium is in excess relative to uranium, and radium is in excess relative to thorium. A deficiency appears to exist for 210 Pb relative to 214 Bi and 214 Pb. If these results are borne out by further analysis, they would suggest transport of nuclides from the high-grade boulder into its surroundings, followed by continued leaching of uranium and lead from the environment
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El proceso de institucionalización de la música en Bahía Blanca : Una propuesta teórico-metodológica
Caubet, María Noelia
2016-01-01
La formación obtenida en el Conservatorio de Música y el cursado simultáneo del Profesorado y la Licenciatura en Historia en la Universidad Nacional del Sur, me generaron diversas inquietudes acerca de los procesos de conformación de los organismos de enseñanza e interpretación musical en Bahía Blanca, un tema poco explorado por la historiografía local. La tesina Músicos en Red. La creación del Conservatorio Provincial de Música en el proceso de institucionalización cultural de Bahía Blanca (...
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Insectos acuáticos y calidad del agua en la cuenca y embalse del río Peñas Blancas, Costa Rica
Directory of Open Access Journals (Sweden)
Meyer Guevara Mora
2011-06-01
Full Text Available La población de insectos acuáticos y la calidad del agua fueron caracterizadas tomando en cuenta las alteraciones humanas y naturales en el área de estudio. Durante los muestreos mensuales, el pH, OD, temperatura, nivel del agua, DBO, PO4 y NO3 fueron medidos. Los índices biológicos (abundancia, riqueza de especies y el BMWP-CR se evaluaron para determinar la calidad del agua. No se detectaron relaciones entre las variables ambientales y los insectos acuáticos, pero las diferencias espaciales y temporales en la abundancia y riqueza fueron asociadas con las crecidas del río (temporal y a la presencia del embalse Peñas Blancas (espacial. En el futuro las investigaciones en la cuenca Peñas Blancas deben de ser dirigidas a determinar la magnitud de la influencia de los caudales, liberación de sedimentos y la posible degradación de la calidad del agua por efluentes de aguas servidas que se lleguen a ubicar en la cuenca.Aquatic insects and water quality in Peñas Blancas watershed and reservoir. The aquatic insects have been used to evaluate water quality of aquatic environments. The population of aquatic insects and the water quality of the area were characterized according to the natural and human alterations present in the study site. During the monthly-survey, pH, DO, temperature, water level, DBO, PO4 and NO3 were measured. Biological indexes (abundance, species richness and the BMWP-CR were used to evaluate the water quality. No relation between environmental and aquatic insects was detected. Temporal and spatial differences attributed to the flow events (temporal and the presence of Peñas Blancas reservoir (spatial. In the future, the investigations in Peñas Blancas watershed need to be focused on determining the real influence of the flows, sediment release and the possible water quality degradation because of agriculture activities. Rev. Biol. Trop. 59 (2: 635-654. Epub 2011 June 01.
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Forbis, Robert Earl, Jr.
Academic literature analyzing the Bureau of Land Management (BLM) land-use subgovernment stops at the Taylor Grazing Act and concludes that the historical development of administering grazing on public lands led to the capture of the BLM by ranching interests. Using a two-pronged methodological approach of process tracing and elite interviews this dissertation seeks to advance our collective knowledge of subgovernment theory by (a) clarifying the impact executive decision-making has on subgovernments and (b) identifying the conditions under which strategically competitive behavior between two competing subgovernment actors occurs. The dissertation seeks to update the literature by explaining what has caused the BLM to shift from a rancher-dominated agency to an energy dominated agency by identifying conditions under which subgovernment actors strategically respond to a political conflict. The research poses two questions: (1) how have executive actions disrupted an existing balance of power in a so-called "strong corner" of an entrenched subgovernment system and (2) what happens when conflict and competition break out between allied members of the system? Analysis indicates that as the BLM responded to Executive actions emphasizing domestic energy production, a conflict emerged between traditional allies: ranching and energy. Triggered by the unintended consequence of awakening long-dormant legislation, split-estate energy development---where property rights are severed between private surface and federal mineral estates---expanded across the West. In turn, this expansion helped establish the conditions for conflict and in doing so disrupted the balance of power between large public resource use interests in the relatively stable land-use subgovernment of the BLM. Indicative of energy's emerging dominance of the BLM's subgovernment, split-estate energy development led ranching interests to seek the protection of their Western state legislatures. This shift in
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Seismic Stratigraphy of Pleistocene Deltaic Deposits in Bahía Blanca Estuary, Argentina
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SALVADOR ALIOTTA
2014-06-01
Full Text Available The Bahía Blanca estuary (Argentina has a morphological configuration resulting from hydrological and sedimentary processes related to Late Quaternary sea level changes. This estuarine system occupies a large coastal plain with a dense net of tidal channels, low-altitude islands and large intertidal flats. Little is known about the sedimentary units of the marine subbottom. Therefore, a stratigraphical analysis of the northern coast of Bahía Blanca estuary was carried out using high resolution seismic (3.5 kHz in order to: i define Quaternary sequences, ii describe sedimentary structures, and iii determine the paleoenvironmental conditions of sedimentation. The seismic stratigraphic data collected and their correlation with drilling lithological data show five seismic sequences (S1, S2, S3, S4 and S5, of which S1-S2 were found to be associated with a continental paleoenvironment of Miocene-Pleistocene age. Sequences S3 and S4, whose lithology and seismic facies (paleochannel structures and prograding reflection configurations, were defined on these materials, to evidence the development of an ancient deltaic environment which was part of a large Pleistocene drainage system. The S5 sequence was formed during the Holocene transgressive-regressive process and complete the seismostratigraphic column defined in the present study.
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Proglacial Groundwater Flux and Storage in the Cordillera Blanca, Peru
Chavez, D.; McKenzie, J. M.; Baraer, M.; Mark, B. G.
2012-12-01
As tropical glaciers continue to rapidly retreat in the Cordillera Blanca, Peru, dry-season water resources are becoming more dependent on groundwater baseflow. Therefore, understanding the flux and storage of proglacial groundwater is necessary to forecast how groundwater storage can offset decreasing water resources. Recent studies of the Rio Santa Watershed, which drains the western slopes of the Cordillera Blanca, have identified that groundwater is the largest contributor to outflow from many watersheds during the dry season and that the flux of groundwater is temporarily available (clay to silt sized glaciolacustrine material at each drill site. This layer was typically less than 5 m in thickness and had a low hydraulic conductivity (clay layer were water bearing units of course material (either well-sorted sand/gravel or talus deposits) with an average hydraulic conductivity of 10-5 m/s. Additionally numerous discontinuous sand lenses and localized glaciofluvial gravel deposits were observed within the clay layer. The glaciolacustrine deposits behave as confining units that were capable of generating localized artesian conditions in the coarse grain units. The occurrence of the clay units adjacent to the main stream channels suggests that the flatness of the valley floors is not the result of river meander. The coarse grained units have the potential to act as important aquifers with significant groundwater storage and flow. Our preliminary findings indicate that the course grained units are important hydrogeological conduits with the ability to buffer low flow conditions in proglacial streams during the dry season. We present a new schematic model of how groundwater moves through these important proglacial environments, providing temporal storage of glacial meltwater and precipitation.
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Evaluación de recursos hídricos de las sierras Blanca y Mijas (Málaga
Directory of Open Access Journals (Sweden)
Vadillo, I.
1997-04-01
Full Text Available A water balance of Sierras Blanca and Mijas Hydrogeological Unit, the most important aquifer in the Costa del Sol, in the period 1990/91-1993/94, has been made. The recharge is produced by the infiltration of rain water with a total amount of 116.9 hmhm3/year/year: 60.2 hm3/year has been evapotranspirated, 56.7 hm3/year belongs to the useful rain (8 hm3/year as streamflow and 48.7 hm /year as infiltration. The discharge have been measured and gives a total amount of 62.2 hm3/year: 28.2 hm3/year by the springs and 34 hm3/year by the pumpings. The useful rain has been calculated with several methods (Turc, Coutagne, Kessler, chloride method and monthly and daily Thornwaite method -with field capacities of 25 and 50 mm-. The method that fits in a better way with the known volumes of recharge and discharge, for each one of the aquifer system and for the whole Blanca-Mijas Hydrogeological Unit, is the chloride method.Se ha realizado el balance de la Unidad Hidrogeológica Sierra Blanca-Sierra de Mijas, la más importante de la Costa del Sol, para la media del período 1990/911993/ 94. La precipitación media sobre la Unidad es de 116,9 hm3/año: 60,2 hm3/año se evapotranspiran y 56,7 hm3/año constituyen la lluvia útil (8 hm3/año de escorrentía y 48,7 hm3/año de infiltración eficaz. Las salidas controlables ascienden a 62,2 hm3/año: 28,2 hm3/año se descargan por manantiales y 34 hm3/año por bombeos. La lluvia útil se ha calculado mediante varios métodos (Turc, Coutagne, Kessler, balance de cloruros, Thornwhite diario y mensual -con capacidades de campo de 25 y 50 mm-. El método que más se adapta a los volúmenes conocidos de entradas y salidas, para cada uno de los sistemas acuíferos y para la Unidad Hidrogeológica BlancaMijas en su conjunto, es el balance de cloruros.
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STRATIGRAPHY OF THE PB-1 WELL, NOPAL 1 URANIUM DEPOSIT, PENA BLANCA, CHIHUAHUA, MEXICO
International Nuclear Information System (INIS)
P. Dobson
2005-01-01
The objectives of this report are: (1) Stratigraphic study part of integrated research project examining migration of radionuclides at Pena Blanca; (2) Immediate objectives of study include: locate stratigraphic contacts in third dimension; measure rock properties (matrix permeability, porosity, mineralogy, cation exchange capacity) of cored section; determine fracture frequency and orientation; (3) Results of study serve as primary inputs to flow and transport models
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STRATIGRAPHY OF THE PB-1 WELL, NOPAL 1 URANIUM DEPOSIT, PENA BLANCA, CHIHUAHUA, MEXICO
Energy Technology Data Exchange (ETDEWEB)
P. Dobson
2005-09-14
The objectives of this report are: (1) Stratigraphic study part of integrated research project examining migration of radionuclides at Pena Blanca; (2) Immediate objectives of study include: locate stratigraphic contacts in third dimension; measure rock properties (matrix permeability, porosity, mineralogy, cation exchange capacity) of cored section; determine fracture frequency and orientation; (3) Results of study serve as primary inputs to flow and transport models.
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The expansion of intensive agriculture and ranching in Brazilian Amazonia
Walker, Robert; DeFries, Ruth; del Carmen Vera-Diaz, Maria; Shimabukuro, Yosio; Venturieri, Adriano
Agriculture in Amazonia has often provoked controversy, given the tremendous ecological value of the region's environment. First with ranching, and now with the soybean boom, tractors and cattle have marched across lands that for millennia supported only closed moist forest, resident ecosystems, and dispersed indigenous peoples. The present chapter considers this expansion, focusing on the Brazilian portion of the basin. Its premise is that effective Amazonian policy must be grounded on an understanding of the region's agriculture. The chapter pursues its objectives by first addressing the development initiatives that created the preconditions for Amazonia's current agricultural economy. The region is remote and has therefore required sustained government intervention to release its potential. The policy discussion is followed by descriptions of cattle ranching and soy farming. For each, market settings and trajectories of expansion are presented. Although these sectoral descriptions are data rich, they do not provide a conceptual framework for analyzing the environmental impacts of evolving market conditions. To accomplish this, the chapter invokes the classical land use model of von Thünen to explain Amazonian land cover dynamics in relation to soy-cattle linkages. It addresses these dynamics with remote sensing data from Mato Grosso, Pará, and Rondônia, and then discusses scenarios of agricultural advances on the forest. Conclusions follow, considering possible policy responses to deforestation, and the social context of agricultural intensification, with special attention to the issues of land tenure security and distributional equity.
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Wigmore, O.; Mark, B. G.
2015-12-01
The glaciers of the Cordillera Blanca, Peru are rapidly retreating as a result of rising temperatures, transforming the hydrology and impacting the socio-economic and environmental systems of the Rio Santa basin. Documenting the heterogeneous spatial patterns of these changes to understand processes of water storage and flow is hindered by technologic and logistic challenges. Highly complex topography, cloud cover and coarse spatial resolution limit the application of satellite data while airborne data collection remains costly and potentially dangerous. However, recent developments have made Unmanned Aerial Vehicle (UAV) technology a viable and potentially transformative method for studying glacier dynamics and proglacial hydrology. The extreme altitudes (4000-6700m) of the Cordillera Blanca limit the use of 'off the shelf' UAVs. Therefore we developed a low cost multispectral (visible, near-infrared and thermal infrared) multirotor UAV capable of conducting fully autonomous aerial surveys at elevations over 5000m within the glacial valleys of the Cordillera Blanca. Using this platform we have completed repeat aerial surveys (in 2014 and 2015) of the debris covered Llaca Glacier, generating highly accurate 10-20cm DEM's and 5cm orthomosaics using a structure from motion workflow. Analysis of these data reveals a highly dynamic system with some areas of the glacier losing as much as 16m of vertical elevation, while other areas have gained up to 5m of elevation over one year. The magnitude and direction of these changes appears to be associated with the presence of debris free ice faces and meltwater ponds. Additionally, we have mapped proglacial meadow and wetland systems. Thermal mosaics at 10-20cm resolution are providing novel insights into the hydrologic pathways of glacier meltwater including mapping the distribution of artesian springs that feed these wetland systems. The high spatial resolution of these UAV datasets facilitates a better understanding of the
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Archaeometric study of ceramic figurines from the Maya settlement of La Blanca (Petén, Guatemala)
International Nuclear Information System (INIS)
Horcajada, P.; Roldán, C.; Vidal, C.; Rodenas, I.; Carballo, J.; Murcia, S.; Juanes, D.
2014-01-01
In this article, analytical results will be presented and discussed regarding a selected set of figurines from the ancient Maya settlement of La Blanca in Petén, Guatemala. The objective is to characterize the ceramic material by two analytical complementary techniques: X-ray diffraction (XRD) and total reflection X-ray fluorescence (TXRF). The data obtained by means of both XRD and TXRF were compared and analyzed by multivariate statistical techniques in order to obtain sample groups according to their chemical composition. The results of this archaeometric study have been compared to those that have been obtained through macroscopic characterization by means of the traditional classification system know as Type-Variety. Discordances have been found between the clusters obtained by the Type-Variety classification system and the multivariate classification procedures performed on analytical data. - Highlights: • TXRF and XRD analysis are used in studies of Maya figurines from La Blanca settlement (Guatemala). • Multivariate classification procedures were performed on analytical data to identify figurine groups. • Clustering of analytical data is compared with the traditional Type-Variety classification system
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Energy Technology Data Exchange (ETDEWEB)
D.C. French; E.Y. Anthony; P.C. Goodell
2005-07-18
The Pena Blanca natural analog is located in the Sierra Pena Blanca, approximately 50 miles north of Chihuahua City, Mexico. The Sierra Pena Blanca is composed mainly of ash-flow tuffs, and the uranium in the region is contained in the brecciated zones of these tuffs. The Pena Blanca site is considered a natural analog to the proposed Yucca Mountain Nuclear Waste Repository because they share similar characteristics of structure, volcanic lithology, tectonic activity, and hydrologic regime. One of the mineralized zones, the Nopal I deposit, was mined in the early 1980s and the ore was stockpiled close to the mine. This stockpile area has subsequently been cleared and is referred to as the prior high-grade stockpile (PHGS) site. Soil surrounding boulders of high-grade ore associated with the PHGS site have been sampled. The purpose of this study is to characterize the transport of uranium series radioisotopes from the boulder to the soil during the past 25 years. Transport is characterized by determining the activities of individual radionuclides and daughter to parent ratios. The daughter to parent ratios are used to establish whether the samples are in secular equilibrium. Activities are determined using gamma-ray spectroscopy. Isotopes of the uranium series decay chain detected by gamma-ray spectroscopy include {sup 210}Pb, {sup 234}U, {sup 234}Th, {sup 230}Th, {sup 226}Ra, {sup 214}Pb, {sup 214}Bi, and {sup 234}Pa. Preliminary results indicate that some daughter to parent pairs appear to be in secular disequilibrium. Thorium is in excess relative to uranium, and radium is in excess relative to thorium. A deficiency appears to exist for {sup 210}Pb relative to {sup 214}Bi and {sup 214}Pb. If these results are borne out by further analysis, they would suggest transport of nuclides from the high-grade boulder into its surroundings, followed by continued leaching of uranium and lead from the environment.
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Margaritasite: a new mineral of hydrothermal origin from the Pena Blanca uranium district, Mexico.
Wenrich, K.J.; Modreski, P.J.; Zielinski, R.A.; Seeley, J.L.
1982-01-01
Margaritasite, (Cs,K,H3O)2(UO2)2V2O8.nH2O (where Cs > K, H3O and n approx 1), a 10.514, b 8.425, c 7.25 A, beta 106.01o, P21/a, Z = 2, is a newly recognized uranium ore mineral named for the Margaritas deposit, Pena Blanca uranium district, Chihuahua, Mexico, at which it was discovered. A Cs-rich analogue of carnotite, margaritasite is the natural equivalent of synthetic Cs-uranyl vanadate (A.M. 43- 799, 50-825). A fine-grained yellow mineral, it is most easily distinguished from carnotite by XRD; X-ray powder patterns (CuKalpha radiation) show that the (001) reflection of margaritasite lies at 12.7o (2theta ), while that of carnotite is found at 13.8o (2theta ). The shift of the (001) reflection in margaritasite reflects the structural changes caused when Cs occupies the sites filled by K in carnotite. Synthesis experiments indicate that margaritasite also differs from carnotite in a higher-T hydrothermal origin. Chemical analyses and XRD data for margaritasite and synthetic Cs- carnotite, and chemical analyses for rocks from Sierra Pena Blanca and vicinity, are tabulated.-J.A.Z.
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Introduction to in situ leaching technique and facility at Smith Ranch uranium project in USA
International Nuclear Information System (INIS)
Xu Lechang; Wang Delin; Sun Xianrong; Gao Shangxiong
2005-01-01
The history of in situ leaching of uranium in USA is reviewed. Some techniques and parameters of alkaline in situ leach at Smith Ranch uranium project are introduced, including well field, sorption, elution, precipitation, filter and drying, automatic control, radiation protection, safety and environmental protection. (authors)
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Pena Blanca uranium deposits and ash-flow tuffs relationship
International Nuclear Information System (INIS)
Magonthier, M.
1987-01-01
The Pena Blanca uranium deposits (Chihuahua, Mexico) are associated with a Tertiary sequence of ash-flow tuffs. Stratigraphic control is dominant and uranium mineralization occurs in stratiform and fracture-controlled deposits within 44 My-old units: Nopal Rhyolite and Escuadra Rhyolite. These units consist of highly vapor-phase crystallized ash-flow tuffs. They contain sanidine, quartz and granophyric phenocrysts, and minor ferromagnesian silicates. Nopal and Escuadra units are high-silica alkali-rich rhyolites that have a primary potassic character. The trace-element chemistry shows high concentrations in U-Th-Rb-Cs and low contents in Ba-Sr-Eu. These chemical properties imply a genetic relationship between deposits and host-units. The petrochemical study show that the Nopal Rhyolite and Escuadra Rhyolite are the source of U and of hydrothermal solutions [fr
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Spatial distribution of canine zoonotic enteroparasites in Bahía Blanca, Argentina
Directory of Open Access Journals (Sweden)
Luciano F La Sala
2015-03-01
Full Text Available The objectives of this research were: (1 to determine the occurrence of zoonotic enteroparasites in dog feces from Bahía Blanca, Argentina; (2 to characterize the spatial distribution of the parasites found in association with the quality of life index (QLI in neighborhoods of Bahía Blanca; and (3 to determine if the presence of a particular parasite genus in a stool sample was facilitated or impeded by the presence of other parasite genera. Samples of dog stools (n = 475 were collected between December 2012 and December 2013 in areas with varying QLI. The association between QLI values and the presence of parasites was analyzed using logistic regression. Overall enteroparasite occurrence was 36.6%. Parasitic forms found included nematode larvae, cysts of Blastocystis spp., Giardia spp., and oocysts of Cryptosporidium spp., and eggs of Ancylostoma caninum, Toxocara canis, cestodes and Trichuris spp. For certain enteroparasites, we detected significant associations between their occurrence and QLI. Feces collected in areas with medium and low QLI were 2.46 and 5.43 times more likely, respectively, to contain A. caninum than stools from the high-QLI area. Samples from areas with low QLI were 2.36 times more likely to contain Trichuris spp. than those from the high QLI area. Regarding protozoa, feces from areas with low QLI were 2.4 times more likely to be positive than those from areas with high QLI. We demonstrated that canine zoonotic parasites have a wide distribution in the study area, and that occurrence is higher in neighborhoods with lower QLI.
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Cultivo de cachama blanca en altas densidades y en dos sistemas cerrados
Directory of Open Access Journals (Sweden)
Germán Poleo
2011-04-01
Full Text Available El objetivo de este trabajo fue evaluar la tolerancia de la cachama blanca, Piaractus brachypomus, a cultivos en altas densidades en sistemas cerrados. Novecientos alevines de 44,3±26 g de peso, se distribuyeron en seis tanques de concreto, con 4,8 m³ de agua. Tres tanques presentaron cero recambio de agua (SCR, y en otros tres, el agua se hizo circular a través de un bioclarificador (SRA. Ambos tratamientos presentaron fuerte aireación para mantener los sólidos en suspensión y suministrar aire. Los peces se alimentaron a saciedad con pienso comercial por 192 días. Los parámetros de calidad de agua como: oxígeno disuelto, amonio total, nitritos, nitratos, alcalinidad, dureza, temperatura y pH, se midieron semanalmente. Los peces en el SCR crecieron a una tasa de 2,34±0,05 g por día, y tuvieron conversión alimenticia de 1,5±0,06, densidad final de 12,96±0,53 kg m-3, y peso final de 449,5±99 g. En el SRA, los peces crecieron 2,33±0,03 g por día, con conversión alimenticia de 1,6±0,07, densidad final de 12,13±1,12 kg m-3, y peso final de 446,5±10 g. La cachama blanca puede ser cultivada en sistemas cerrados con cero recambio de agua en altas densidades.
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Geomorphologically effective floods from moraine-dammed lakes in the Cordillera Blanca, Peru
Emmer, Adam
2017-12-01
Outburst floods originating in moraine-dammed lakes represent a significant geomorphological process as well as a specific type of threat for local communities in the Cordillera Blanca, Peru (8.5°-10° S; 77°-78° W). An exceptional concentration of catastrophic floods has been reported from the Cordillera Blanca in the first half of 20th Century (1930s-1950s), leading to thousands of fatalities. The main objective of this paper is to provide a revised and comprehensive overview of geomorphologically effective floods in the area of interest, using various documentary data sources, verified by analysis of remotely sensed images (1948-2013) and enhanced by original field data. Verified events (n = 28; 4 not mentioned before) are analysed from the perspective of spatiotemporal distribution, pre-flood conditions, causes, mechanisms and geomorphological impacts as well as socioeconomical consequences, revealing certain patterns and similar features. GLOFs are further classified according to their magnitude: 5 extreme events, 8 major events and 15 minor events are distinguished, referring to the quantified geomorphological and socioeconomical impacts. Selected moraine dams and flood deposits are dated using lichenometric dating. Special attention is given to moraine dam breaches - the most frequent type of water release with the most significant consequences. Selected major events and their consequences are studied in detail in a separate section. Finally, a general schematic model of lake formation, growth and post-flood evolution reflecting initial topographical setting and glacier retreat is introduced and the utilization of the obtained results is outlined.
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Calas, G.; Angiboust, S.; Fayek, M.; Camacho, A.; Allard, T.; Agrinier, P.
2009-12-01
The Peña Blanca molybdenum-uranium field (Chihuahua, Mexico) exhibits over 100 airborne anomalies hosted in tertiary ignimbritic ash-flow tuffs (44 Ma) overlying the Pozos conglomerate and a sequence of Cretaceous carbonate rocks. Uranium occurrences are associated with breccia zones at the intersection of two or more fault systems. Periodic reactivation of these structures associated with Basin and Range and Rio Grande tectonic events resulted in the mobilization of U and other elements by meteoric fluids heated by geothermal activity. Trace element geochemistry (U, Th, REE) provides evidence for local mobilization of uranium under oxidizing conditions. In addition, O- and H-isotope geochemistry of kaolinite, smectite, opal and calcite suggests that argillic alteration proceeded at shallow depth with meteoric water at 25-75 °C. Focussed along breccia zones, fluids precipitated several generations of pyrite and uraninite together with kaolinite, as in the Nopal 1 mine, indicating that mineralization and hydrothermal alteration of volcanic tuffs are contemporaneous. Low δ34S values (~ -24.5 ‰) of pyrites intimately associated with uraninite suggest that the reducing conditions at the origin of the U-mineralization arise from biological activity. Later, the uplift of Sierra Pena Blanca resulted in oxidation and remobilization of uranium, as confirmed by the spatial distribution of radiation-induced defect centers in kaolinites. These data show that tectonism and biogenic reducing conditions can play a major role in the formation and remobilization of uranium in epithermal deposits. By comparison with the other uranium deposits at Sierra Pena Blanca and nearby Sierra de Gomez, Nopal 1 deposit is one of the few deposits having retained a reduced uranium mineralization.
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Archaeological survey of the McGee Ranch vicinity, Hanford Site, Washington
Energy Technology Data Exchange (ETDEWEB)
Gard, H.A.; Poet, R.M.
1992-09-01
In response to a request for a cultural resources review from Westinghouse Hanford Company for the Action Plan for Characterization of McGee Ranch Soil, Pacific Northwest Laboratory's Hanford Cultural Resources Laboratory (HCRL) conducted an archaeological survey of the McGee Ranch vicinity, located in the northwest portion of the Hanford Site. Staff members covered 8.4 km{sup 2} and recorded 42 cultural resources; 22 sites, and 20 isolated artifacts. Only 2 sites and 3 isolates were attributed to a prehistoric Native American occupation. The historic sites date from the turn of the century to the 1940s and are representative of the settlement patterns that occurred throughout the Columbia Basin. In addition to an archaeological pedestrian survey of the project area, we conducted literature and records searches and examined available aerial photographs. Records kept at HCRL were reviewed to determine if any archaeological survey had been conducted previously within the project area. Although no survey had been conducted, portions of the area adjacent to project boundaries were surveyed in 1988 and 1990. During those surveys, historic and prehistoric cultural resources were observed, increasing the possibility that similar land usage had taken place within the current project boundaries. Literature searches established a general historical sequence for this area. Aerial photographs alerted researchers to homesteads and linear features, such as roads and irrigation ditches, that might not be apparent from ground level.
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Archaeological survey of the McGee Ranch vicinity, Hanford Site, Washington
Energy Technology Data Exchange (ETDEWEB)
Gard, H.A.; Poet, R.M.
1992-09-01
In response to a request for a cultural resources review from Westinghouse Hanford Company for the Action Plan for Characterization of McGee Ranch Soil, Pacific Northwest Laboratory`s Hanford Cultural Resources Laboratory (HCRL) conducted an archaeological survey of the McGee Ranch vicinity, located in the northwest portion of the Hanford Site. Staff members covered 8.4 km{sup 2} and recorded 42 cultural resources; 22 sites, and 20 isolated artifacts. Only 2 sites and 3 isolates were attributed to a prehistoric Native American occupation. The historic sites date from the turn of the century to the 1940s and are representative of the settlement patterns that occurred throughout the Columbia Basin. In addition to an archaeological pedestrian survey of the project area, we conducted literature and records searches and examined available aerial photographs. Records kept at HCRL were reviewed to determine if any archaeological survey had been conducted previously within the project area. Although no survey had been conducted, portions of the area adjacent to project boundaries were surveyed in 1988 and 1990. During those surveys, historic and prehistoric cultural resources were observed, increasing the possibility that similar land usage had taken place within the current project boundaries. Literature searches established a general historical sequence for this area. Aerial photographs alerted researchers to homesteads and linear features, such as roads and irrigation ditches, that might not be apparent from ground level.
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Wake deficit measurements on the Jess and Souza Ranches, Altamont Pass
Energy Technology Data Exchange (ETDEWEB)
Nierenburg, R. (Altamont Energy Corp., San Rafael, CA (USA))
1990-04-01
This report is ninth in a series of documents presenting the findings of field test under DOE's Cooperative Field Test Program (CFTP) with the wind industry. This report provides results of a project conducted by Altamont Energy Corp. (AEC) to measure wake deficits on the Jess and Sousa Ranches in Altamont Pass, CA. This research enhances and complements other DOE-funded projects to refine estimates of wind turbine array effects. This project will help explain turbine performance variability caused by wake effects. 4 refs., 28 figs., 106 tabs.
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Shortleaf pine natural community restoration on Peck Ranch Conservation Area in the Missouri Ozarks
John G. Tuttle; Kim J. Houf
2007-01-01
Oak decline has become a significantly increasing problem on Peck Ranch Conservation Area over the last several years. Most of the oak decline problems exist on past shortleaf pine sites. To address this issue, the area managers wrote a natural community restoration plan for 2,233 acres located on the Current-Eleven Point Oak-Pine Woodland Dissected Plain land type...
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Major QTLs Control Resistance to Rice Hoja Blanca Virus and Its Vector Tagosodes orizicolus
Romero, Luz E.; Lozano, Ivan; Garavito, Andrea; Carabali, Silvio J.; Triana, Monica; Villareal, Natalia; Reyes, Luis; Duque, Myriam C.; Martinez, César P.; Calvert, Lee; Lorieux, Mathias
2013-01-01
Rice hoja blanca (white leaf) disease can cause severe yield losses in rice in the Americas. The disease is caused by the rice hoja blanca virus (RHBV), which is transmitted by the planthopper vector Tagosodes orizicolus. Because classical breeding schemes for this disease rely on expensive, time-consuming screenings, there is a need for alternatives such as marker-aided selection. The varieties Fedearroz 2000 and Fedearroz 50, which are resistant to RHBV and to the feeding damage caused by T. orizicolus, were crossed with the susceptible line WC366 to produce segregating F2:3 populations. The F3 families were scored for their resistance level to RHBV and T. orizicolus. The F2:3 lines of both crosses were genotyped using microsatellite markers. One major QTL on the short arm of chromosome 4 was identified for resistance to RHBV in the two populations. Two major QTL on chromosomes 5 and 7 were identified for resistance to T. orizicolus in the Fd2000 × WC366 and Fd50 × WC366 crosses, respectively. This comparative study using two distinct rice populations allowed for a better understanding of how the resistance to RHBV and its vector are controlled genetically. Simple marker-aided breeding schemes based on QTL information can be designed to improve rice germplasm to reduce losses caused by this important disease. PMID:24240781
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Amphibians and reptiles of C. E. Miller Ranch and the Sierra Vieja, Chihuahuan Desert, Texas, USA
Directory of Open Access Journals (Sweden)
Drew R. Davis
2018-02-01
Full Text Available We report the occurrence of 50 species of amphibians and reptiles recently collected on C. E. Miller Ranch and the Sierra Vieja in the Chihuahuan Desert of Texas, USA and describe their perceived distribution and abundance across various habitat associations of the region. Our recent surveys follow intense, historic sampling of amphibians and reptiles from this region in 1948. Of the 50 species detected in recent surveys, six were not collected in 1948 and an additional three species documented in 1948 have yet to be detected in a 14-year period of recent surveys. Combining data from both historic and recent surveys, a total of 53 species of amphibians and reptiles are known from the ranch (11 amphibians, 42 reptiles. Land stewardship and conservation practices have likely contributed to the persistence of the majority of these species through time. Additionally, we discuss the status of amphibians and reptiles not collected during recent surveys and comment on potential species that have not yet been detected.
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Amphibians and reptiles of C. E. Miller Ranch and the Sierra Vieja, Chihuahuan Desert, Texas, USA.
Davis, Drew R; LaDuc, Travis J
2018-01-01
We report the occurrence of 50 species of amphibians and reptiles recently collected on C. E. Miller Ranch and the Sierra Vieja in the Chihuahuan Desert of Texas, USA and describe their perceived distribution and abundance across various habitat associations of the region. Our recent surveys follow intense, historic sampling of amphibians and reptiles from this region in 1948. Of the 50 species detected in recent surveys, six were not collected in 1948 and an additional three species documented in 1948 have yet to be detected in a 14-year period of recent surveys. Combining data from both historic and recent surveys, a total of 53 species of amphibians and reptiles are known from the ranch (11 amphibians, 42 reptiles). Land stewardship and conservation practices have likely contributed to the persistence of the majority of these species through time. Additionally, we discuss the status of amphibians and reptiles not collected during recent surveys and comment on potential species that have not yet been detected.
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Panei, J. A.; Althaus, L. G.; Benvenuto, O. G.
Recientes mediciones de la masa y el radio hechas por Hipparcos de las estrellas enanas blancas 40 Eri B y Procyon B (Shipman, H. & Provencal, J. - ApJ. 1998, 494, 759), sugieren un núcleo compuesto de hierro para dichas estrellas, en lugar de carbono y oxígeno como predice la teoría standard de evolución estelar. Para interpretar estas observaciones, presentamos aquí, relaciones masa-radio para configuraciones degeneradas a temperatura finita para distintas composiciones químicas centrales. Para tal fin hemos calculado secuencias evolutivas de enanas blancas utilizando el código de evolución estelar, desarrollado en el Observatorio de La Plata. Dicho código resuelve las ecuaciones de estructura y evolución estelar mediante la técnica de relajación de Henyey, y esta basado en una descripción física muy detallada y actualizada.
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Czech Academy of Sciences Publication Activity Database
Klimeš, Jan; Novotný, J.; Novotná, I.; Urries de, B.J.; Vilímek, V.; Emmer, Adam; Strozzi, T.; Kusák, Michal; Rapre, A.C.; Hartvich, Filip; Frey, H.
2016-01-01
Roč. 13, č. 6 (2016), s. 1461-1477 ISSN 1612-510X R&D Projects: GA ČR(CZ) GAP209/11/1000 Institutional support: RVO:67985891 ; RVO:67179843 Keywords : landslides * moraines * glacial lakes * slope stability calculation * glacial lake outburst floods * impact wave models * Cordillera Blanca Subject RIV: DE - Earth Magnetism, Geodesy, Geography; DE - Earth Magnetism, Geodesy, Geography (UEK-B) Impact factor: 3.657, year: 2016
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93 Years of stand density and land-use legacy research at the Coulter Ranch Study Site
Andrew J. Sanchez Meador; Margaret M. Moore
2008-01-01
In 1913, the Fort Valley Experimental Forest initiated an unprecedented case-study experiment to determine the effects of harvesting methods on tree regeneration and growth on a ponderosa pine-Gambel oak forest at Coulter Ranch in northern Arizona. The harvesting methods examined were seed-tree, group selection, and light selection. In addition, the effects of...
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Freire, Miguel
2007-01-01
[ESTRUCTURA DE LA SUBSTANCIA BLANCA DE LA MÉDULA]. Tubos nerviosos, [fibras sin mielina,] células neuróglicas y colaterales nerviosas. ─ Variedades de colaterales distinguidas por el área gris en que se terminan ─ Fibras nerviosas terminales. ─ Fascículos dislocados de la substancia blanca. [Ver: Freire, Miguel. Metodología usada en la presente edición. Metodología e historia de la edición en la correspondencia de Cajal. https://digital.csic.es/handle/10261/150245
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Spatial distribution of canine zoonotic enteroparasites in Bahía Blanca, Argentina.
La Sala, Luciano F; Leiboff, Anastasia; Burgos, Julián M; Costamagna, Sixto R
2015-01-01
The objectives of this research were: (1) to determine the occurrence of zoonotic enteroparasites in dog feces from Bahía Blanca, Argentina; (2) to characterize the spatial distribution of the parasites found in association with the quality of life index (QLI) in neighborhoods of Bahía Blanca; and (3) to determine if the presence of a particular parasite genus in a stool sample was facilitated or impeded by the presence of other parasite genera. Samples of dog stools (n=475) were collected between December 2012 and December 2013 in areas with varying QLI. The association between QLI values and the presence of parasites was analyzed using logistic regression. Overall enteroparasite occurrence was 36.6%. Parasitic forms found included nematode larvae, cysts of Blastocystis spp., Giardia spp., and oocysts of Cryptosporidium spp., and eggs of Ancylostoma caninum, Toxocara canis, cestodes and Trichuris spp. For certain enteroparasites, we detected significant associations between their occurrence and QLI. Feces collected in areas with medium and low QLI were 2.46 and 5.43 times more likely, respectively, to contain A. caninum than stools from the high-QLI area. Samples from areas with low QLI were 2.36 times more likely to contain Trichuris spp. than those from the high QLI area. Regarding protozoa, feces from areas with low QLI were 2.4 times more likely to be positive than those from areas with high QLI. We demonstrated that canine zoonotic parasites have a wide distribution in the study area, and that occurrence is higher in neighborhoods with lower QLI. Copyright © 2014 Asociación Argentina de Microbiología. Publicado por Elsevier España, S.L.U. All rights reserved.
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Felix P. Ratcliff; James Bartolome; Michele Hammond; Sheri Spiegal; Michael White
2015-01-01
Ecological site descriptions and associated state-and-transition models are useful tools for understanding the variable effects of management and environment on range resources. Models for woody riparian sites have yet to be fully developed. At Tejon Ranch, in the southern San Joaquin Valley of California, we are using ecological site theory to investigate the role of...
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Czech Academy of Sciences Publication Activity Database
Novotný, J.; Klimeš, Jan
2014-01-01
Roč. 11, č. 3 (2014), s. 563-577 ISSN 1672-6316 R&D Projects: GA ČR(CZ) GAP209/11/1000 Institutional support: RVO:67985891 Keywords : moraines * grain size distribution * shear strength * hydraulic conductivity * Cordillera Blanca Subject RIV: DE - Earth Magnetism, Geodesy, Geography Impact factor: 0.963, year: 2014
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Field studies of game and livestock under African ranching conditions
International Nuclear Information System (INIS)
King, J.M.
1982-01-01
A model was used to integrate the results of tritiated-water studies on game and livestock under African ranching conditions. The model illustrated the two main functions of water in a tropical herbivore, i.e. as a medium for intermediary metabolism and for evaporative cooling. The close relationship between water and nutrition in the ecosystem is reflected in the water and energy conservation mechanisms which operate concomitantly in the animal. Arid-adapted animals can maintain productivity, albeit low, on a limited water intake despite high environmental heat loads. This is achieved because of a number of physical as well as physiological attributes, which can reduce the effect of the environmental heat load without affecting the intake of food and its utilization. (author)
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Iturrizaga, L.
2012-04-01
The Hatunraju Glacier (9°00'S/70°40'W) is located in the Parón valley in the northern part of the Cordillera Blanca. The almost 4 km long and steeply inclined glacier flows down from the Huandoy-N-Side (6395 m) into the Parón valley to an elevation of 4250 m a.s.l.. The extremely narrow glacier is in its entire ablation area heavily debris-covered. It is one of the few glaciers, which dam with its debris-mantled glacier tongue a main river in this mountain range. In this case the Hatunraju glacier produces the largest glacier-dammed lake in the Cordillera Blanca, the Laguna Parón. In some other aspects, this glacier proves to be distinct from the majority of the glaciers in the Cordillera Blanca: It is flowing on an almost up to 250 m high moraine pedestal ("moraine-dammed raised bed glacier") and the glacier makes a bend of almost 90° when entering into the main valley. The present paper focuses in particular on the last point: the formation of the so called "crooked moraine". It has been explained by Lliboutry (1977) as a result of a glacier lake outburst and the subsequent destruction of the latero-frontal moraine. The later process supposed to be the trigger of the abrupt change in the flow direction of the lower part of the glacier. Recent investigations suggest an alternative genesis of the crooked moraine considering the distinct phases of the glaciation history of the Parón valley. The here proposed formation pattern is also paradigmatic for other crooked debris-covered glaciers, especially in High Asia. Comparative examples will be provided from the Karakoram and Himalayas. The research work on the Hatunraju Glacier is part of a project on the glacial geomorphology in the Tropical Andes financed by the Alexander von Humboldt-Foundation.
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1983-05-01
0XandA±liA Poison hemlock Cgn~i lfAQUIAtW Hottentot-fig 14espmbrvunthe~mmgjj jaumea 1LU31A carnos * Sea lavender Lim~nium califgrnicum miner’s lettuce ...MeagubryAnthomuw odu~lef Jaumea. JAI.mA ZAXn2M Sea lavender Liumnim £&JJ.±oLnicim Miner’s lettuce Montia perflnaa Li nanthus LTfAnDnhILE granAilau...PROPUCT IN P 100 W 4tM POLLINATION Il 12.10 190 1320 TOTAL 1901 93,00 II I ECONOMIC FEASIBILITY OF THE ". CULLINAN RANCH FOR AGR I CULTURAL PRODUCT I ON 1
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Racoviteanu, A.; Arnaud, Y.; Williams, M. W.; Singh Khalsa, S.
2007-12-01
There is urgency in deriving an extensive dataset for deriving glacier changes within the Cordillera Blanca, Peru, in a cost-effective and timely manner. Rapid glacial retreat during the last decades in this area poses a threat for water resources, hydroelectric power and local traditions. While there is some information on decadal changes in glacier extents, there still remains a paucity of mass balance measurements and glacier parameters such as hypsometry, size distribution and termini elevations. Here we investigate decadal changes in glacier parameters for Cordillera Blanca of Peru using data from Système Probatoire d'Observation de la Terre (SPOT) sensor, an old glacier inventory from 1970 aerial photography, field-based mass balance measurements and meteorological observations. Here we focus on: constructing a geospatial glacier inventory from 2003 SPOT scenes; mass balance estimations using remote sensing and field data; frequency distribution of glacier area; changes in termini elevations; hypsometry changes over time; glacier topography (slope, aspect, length/width ratio); AAR vs. mass balance for Artesonraju and Yanamarey benchmark glaciers; precipitation and temperature trends in the region. Over the last 25 years, mean temperatures increases of 0.09 deg.C/yr were greater at lower elevation than the 0.01 deg.C/yr at higher elevations, with little change in precipitation. Comparison of the new SPOT-based glacier inventory with the 1970 inventory shows that glaciers in Cordillera Blanca retreated at a rate of 0.6% per year over the last three decades, with no significant differences in the rate of area loss between E and W side. At lower elevations there is an upward shift of glacier termini along with a decrease in glacier area. Small glaciers are losing more area than large glaciers. Based on the relationship between specific mass balance (bn) and accumulation area ratio (AAR) for the two benchmark glaciers, we predicted a steady-state equilibrium line
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Determinants of elephant distribution at Nazinga Game Ranch, Burkina Faso
Jenks, Jonathan A.; Klaver, Robert W.; Wicks, Zeno W.
2007-01-01
We used seasonal ground total counts and remote sensing and GIS technology to relate elephant (Loxodonta africana africana) distribution at Nazinga Game Ranch to environmental and anthropogenic factors. Variables used in analyses were normalized difference vegetation index, elevation, stream density, density of poaching and human illegal activities, distance to dams, distance to rivers, distance to roads, and distance to poaching risk. Contrary to our expectation, road traffic did not disturb elephants. Strong negative relationships were documented between elephant abundance and stream density, distance to dams, and poaching density. Density of poaching and other human illegal activities explained 81%, vegetation greenness 6%, and stream density 3% of the variation in elephant density. Elephant distribution represented a survival strategy affected by poaching, food quality and abundance, and water availability.
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93 years of stand density and land-use legacy research at the Coulter Ranch Study Site (P-53)
Andrew J. Sanchez Meador; Margaret M. Moore
2008-01-01
In 1913, the Fort Valley Experimental Forest initiated an unprecedented case-study experiment to determine the effects of harvesting methods on tree regeneration and growth on a ponderosa pine-Gambel oak forest at Coulter Ranch in northern Arizona. The harvesting methods examined were seed-tree, group selection, and light selection. In addition, the effects of...
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Directory of Open Access Journals (Sweden)
Johanna Cantillo
2011-05-01
Full Text Available Regional Blanca (RB y Ráquira (RQ. Seutilizó el método Headspace-Microextracciónen Fase Sólida (HS-MEFS paracomparar los perfiles olfativos de tres variedadesde guayaba blanca de la regiónde la hoya del río Suárez (Santander, Colombiadurante tres etapas de maduración(verde, pintón y maduro. En las tresvariedades se presentó un comportamientosimilar, los aldehídos C-6 (hexanal,(Z-3-hexenal y (E-2-hexenal responsablesde la nota verde disminuyen durantela maduración, mientras que el contenidode ésteres (acetato de hexilo y acetato de(Z-3-hexenilo aumenta produciéndoselas notas dulce y frutal características dela fruta madura. Los compuestos ácidos,furánicos y alcoholes se observan en bajasproporciones durante las tres etapas.El análisis de los compuestos volátilesmediante HS-MEFS permitió estableceruna relación entre la transformación decompuestos aldehídos C6, responsablesde la nota verde, en ésteres análogos, alos cuales se les atribuye la nota frutalcaracterística durante el proceso demaduración.
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Cochachin, Alejo; Huggel, Christian; Salazar, Cesar; Haeberli, Wilfried; Frey, Holger
2015-04-01
Over timescales of hundreds to thousands of years ice masses in mountains produced erosion in bedrock and subglacial sediment, including the formation of overdeepenings and large moraine dams that now serve as basins for glacial lakes. Satellite based studies found a total of 8355 glacial lakes in Peru, whereof 830 lakes were observed in the Cordillera Blanca. Some of them have caused major disasters due to glacial lake outburst floods in the past decades. On the other hand, in view of shrinking glaciers, changing water resources, and formation of new lakes, glacial lakes could have a function as water reservoirs in the future. Here we present unprecedented bathymetric studies of 124 glacial lakes in the Cordillera Blanca, Huallanca, Huayhuash and Raura in the regions of Ancash, Huanuco and Lima. Measurements were carried out using a boat equipped with GPS, a total station and an echo sounder to measure the depth of the lakes. Autocad Civil 3D Land and ArcGIS were used to process the data and generate digital topographies of the lake bathymetries, and analyze parameters such as lake area, length and width, and depth and volume. Based on that, we calculated empirical equations for mean depth as related to (1) area, (2) maximum length, and (3) maximum width. We then applied these three equations to all 830 glacial lakes of the Cordillera Blanca to estimate their volumes. Eventually we used three relations from the literature to assess the peak discharge of potential lake outburst floods, based on lake volumes, resulting in 3 x 3 peak discharge estimates. In terms of lake topography and geomorphology results indicate that the maximum depth is located in the center part for bedrock lakes, and in the back part for lakes in moraine material. Best correlations are found for mean depth and maximum width, however, all three empirical relations show a large spread, reflecting the wide range of natural lake bathymetries. Volumes of the 124 lakes with bathymetries amount to 0
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[Drunk driving in professional drivers in the Vía Blanca highway in Cuba].
Guanche Garcell, Humberto; Suárez Enríquez, Tomás; Gutiérrez García, Francisco; Martínez Quesada, Carlos; Mendoza Pérez, Ramón
2006-01-01
To determine the frequency of drunk driving in professional drivers (Via Blanca, Havana City), we carried out a descriptive study of 832 drivers selected by multistage stratified sampling. A structured interview with each driver was carried out to record the variables under study, and a breath alcohol test was subsequently performed. The frequency of drunk driving was 8.18% (95% CI, 5.94%-10.42%), with a predominance of drivers with alcohol levelsDrunk driving was more frequent in "high risk" hours, in drivers aged between 40 and 49 years old (10.3%), and in those with 15 to 24 years of experience (11.02%). The frequency of drunk driving found in this study highlights the need to design traffic accident prevention strategies.
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2012-08-13
... Ranch II, LLC; Bethel Wind Energy LLC; Rippey Wind Energy LLC; Pacific Wind, LLC; Colorado Highlands Wind, LLC; Shooting Star Wind Project, LLC; Notice of Effectiveness of Exempt Wholesale Generator or... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [Docket Nos. EG12-63-000; EG12-64-000...
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Use of three joints as predictors of carcass and body fat depots in Blanca Celtibérica goats
Teixeira, A.; Delfa, R.; González, C.; Gosalvez, L.F.; Tor, M.
1995-01-01
Nineteen adult goats of the Blanca Celtibérica breed - in non productive stage - from the experimental flock of Servicio de Investigación Agraria (Diputación General de Aragón) were scored using the lumbar, breast and tail palpation. Sternal triangle joint, lumbar square jointt a ailn tdha t were handled to assess body condition scores were dissected into muscle, bone subcutaneous fat and intermuscular fat. Regression analyses were developed for predicting carcass and body fat dep...
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Estudio farmacognóstico de ocimum basilicum l. (albahaca blanca
Directory of Open Access Journals (Sweden)
Ester Sánchez Govín
2000-12-01
Full Text Available Ocimum basilicum L. (albahaca blanca es una de las plantas aromáticas que se clasifican por la composición química de su aceite. Se investigó la variedad lactucaefolium que posee propiedades antisépticas, antiinflamatorias y antiespasmódicas. Se determinaron los índices numéricos en esta especie y se estandarizó el perfil cromatográfico a partir de su aceite esencial. El estudio de conservación muestra que el tiempo óptimo de almacenamiento en frasco de vidrio y sobres de polietileno es de 10 meses.Ocimum basilicum L. (white sweet basil is one of the aromatic plants that is classified according to the chemical composition of its oil. The lactucaefolium variety that has antiseptic, antiinflammatory and antispasmodic properties was investigated. The numerical indexes were determined in this species and the chromatographic profile was standardized starting from its essential oil. The conservation study shows that the optimum time of storage in glass flasks and polyethylene bags is of l0 months.
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El Archivo del Centro Socialista “Agustín de Arrieta” de Bahía Blanca
Cabezas, Gonzalo Ezequiel
2013-01-01
El presente artículo se centra en el análisis de la documentación albergada por el Centro Socialista “Agustín de Arrieta” de Bahía Blanca. En primer lugar, se reconstruye brevemente el derrotero histórico de la biblioteca y del archivo del partido, derrotero íntimamente relacionado con los vaivenes, principalmente políticos, que afectaron al socialismo argentino. En segundo término, se hace una descripción general del tipo de documentación que contiene el archivo, señalando potenciales usos y...
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Measurements of light absorbing particulates on the glaciers in the Cordillera Blanca, Peru
Schmitt, C. G.; All, J. D.; Schwarz, J. P.; Arnott, W. P.; Cole, R. J.; Lapham, E.; Celestian, A.
2014-10-01
Glaciers in the tropical Andes have been rapidly losing mass since the 1970s. In addition to the documented increase in air temperature, increases in light absorbing particulates deposited on glaciers could be contributing to the observed glacier loss. Here we report on measurements of light absorbing particulates sampled from glaciers during three surveys in the Cordillera Blanca in Peru. During three research expeditions in the dry seasons (May-August) of 2011, 2012 and 2013, two hundred and forty snow samples were collected from fifteen mountain peaks over altitudes ranging from 4800 to nearly 6800 m. Several mountains were sampled each of the three expeditions and some mountains were sampled multiple times during the same expedition. Collected snow samples were melted and filtered in the field then later analyzed using the Light Absorption Heating Method (LAHM), a new technique that measures the ability of particulates on filters to absorb visible light. LAHM results have been calibrated using filters with known amounts of fullerene soot, a common industrial surrogate for black carbon (BC). As sample filters often contain dust in addition to BC, results are presented in terms of effective Black Carbon (eBC). During the 2013 survey, snow samples were collected and kept frozen for analysis with a Single Particle Soot Photometer (SP2). Calculated eBC mass from the filter analysis and the SP2 refractory Black Carbon (rBC) results were well correlated (r2 = 0.92). These results indicate that a substantial portion of the light absorbing particulates in the more polluted areas were likely BC. The three years of data show that glaciers in the Cordillera Blanca Mountains close to human population centers have substantially higher levels of eBC (as high as 70 ng g-1) than remote glaciers (as low as 2.0 ng g-1 eBC), indicating that population centers can influence local glaciers by sourcing BC.
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Measurements of light-absorbing particles on the glaciers in the Cordillera Blanca, Peru
Schmitt, C. G.; All, J. D.; Schwarz, J. P.; Arnott, W. P.; Cole, R. J.; Lapham, E.; Celestian, A.
2015-02-01
Glaciers in the tropical Andes have been rapidly losing mass since the 1970s. In addition to the documented increase in temperature, increases in light-absorbing particles deposited on glaciers could be contributing to the observed glacier loss. Here we report on measurements of light-absorbing particles sampled from glaciers during three surveys in the Cordillera Blanca Mountains in Peru. During three research expeditions in the dry seasons (May-August) of 2011, 2012 and 2013, 240 snow samples were collected from 15 mountain peaks over altitudes ranging from 4800 to nearly 6800 m. Several mountains were sampled each of the 3 years and some mountains were sampled multiple times during the same year. Collected snow samples were melted and filtered in the field then later analyzed using the Light Absorption Heating Method (LAHM), a new technique that measures the ability of particles on filters to absorb visible light. LAHM results have been calibrated using filters with known amounts of fullerene soot, a common industrial surrogate for black carbon (BC). As sample filters often contain dust in addition to BC, results are presented in terms of effective black carbon (eBC). During the 2013 survey, snow samples were collected and kept frozen for analysis with a Single Particle Soot Photometer (SP2). Calculated eBC mass from the LAHM analysis and the SP2 refractory black carbon (rBC) results were well correlated (r2 = 0.92). These results indicate that a substantial portion of the light-absorbing particles in the more polluted regions were likely BC. The 3 years of data show that glaciers in the Cordillera Blanca Mountains close to human population centers have substantially higher levels of eBC (as high as 70 ng g-1) than remote glaciers (as low as 2.0 ng g-1 eBC), indicating that population centers can influence local glaciers by sourcing BC.
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Cohn, Avery S; Mosnier, Aline; Havlík, Petr; Valin, Hugo; Herrero, Mario; Schmid, Erwin; O'Hare, Michael; Obersteiner, Michael
2014-05-20
This study examines whether policies to encourage cattle ranching intensification in Brazil can abate global greenhouse gas (GHG) emissions by sparing land from deforestation. We use an economic model of global land use to investigate, from 2010 to 2030, the global agricultural outcomes, land use changes, and GHG abatement resulting from two potential Brazilian policies: a tax on cattle from conventional pasture and a subsidy for cattle from semi-intensive pasture. We find that under either policy, Brazil could achieve considerable sparing of forests and abatement of GHGs, in line with its national policy targets. The land spared, particularly under the tax, is far less than proportional to the productivity increased. However, the tax, despite prompting less adoption of semi-intensive ranching, delivers slightly more forest sparing and GHG abatement than the subsidy. This difference is explained by increased deforestation associated with increased beef consumption under the subsidy and reduced deforestation associated with reduced beef consumption under the tax. Complementary policies to directly limit deforestation could help limit these effects. GHG abatement from either the tax or subsidy appears inexpensive but, over time, the tax would become cheaper than the subsidy. A revenue-neutral combination of the policies could be an element of a sustainable development strategy for Brazil and other emerging economies seeking to balance agricultural development and forest protection.
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Neary, Joseph M; Gould, Daniel H; Garry, Franklyn B; Knight, Anthony P; Dargatz, David A; Holt, Timothy N
2013-03-01
Producer reports from ranches over 2,438 meters in southwest Colorado suggest that the mortality of preweaned beef calves may be substantially higher than the national average despite the selection of low pulmonary pressure herd sires for over 20 years. Diagnostic investigations of this death loss problem have been limited due to the extensive mountainous terrain over which these calves are grazed with their dams. The objective of the current study was to determine the causes of calf mortality on 5 high-altitude ranches in Colorado that have been selectively breeding sires with low pulmonary pressure (branding (6 weeks of age) in the spring to weaning in the fall (7 months of age). Clinical signs were recorded, and blood samples were taken from sick calves. Postmortem examinations were performed, and select tissue samples were submitted for aerobic culture and/or histopathology. On the principal study ranch, 9.6% (59/612) of the calves that were branded in the spring either died or were presumed dead by weaning in the fall. In total, 28 necropsies were performed: 14 calves (50%) had lesions consistent with pulmonary hypertension and right-sided heart failure, and 14 calves (50%) died from bronchopneumonia. Remodeling of the pulmonary arterial system, indicative of pulmonary hypertension, was evident in the former and to varying degrees in the latter. There is a need to better characterize the additional risk factors that complicate pulmonary arterial pressure testing of herd sires as a strategy to control pulmonary hypertension.
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Quaternary Slip History for the Agua Blanca Fault, northern Baja California, Mexico
Gold, P. O.; Behr, W. M.; Rockwell, T. K.; Fletcher, J. M.
2017-12-01
The Agua Blanca Fault (ABF) is the primary structure accommodating San Andreas-related right-lateral slip across the Peninsular Ranges of northern Baja California. Activity on this fault influences offshore faults that parallel the Pacific coast from Ensenada to Los Angeles and is a potential threat to communities in northern Mexico and southern California. We present a detailed Quaternary slip history for the ABF, including new quantitative constraints on geologic slip rates, slip-per-event, the timing of most recent earthquake, and the earthquake recurrence interval. Cosmogenic 10Be exposure dating of clasts from offset fluvial geomorphic surfaces at 2 sites located along the western, and most active, section of the ABF yield preliminary slip rate estimates of 2-4 mm/yr and 3 mm/yr since 20 ka and 2 ka, respectively. Fault zone geomorphology preserved at the younger site provides evidence for right-lateral surface displacements measuring 2.5 m in the past two ruptures. Luminescence dating of an offset alluvial fan at a third site is in progress, but is expected to yield a slip rate relevant to the past 10 kyr. Adjacent to this third site, we excavated 2 paleoseismic trenches across a sag pond formed by a right step in the fault. Preliminary radiocarbon dates indicate that the 4 surface ruptures identified in the trenches occurred in the past 6 kyr, although additional dating should clarify earthquake timing and the mid-Holocene to present earthquake recurrence interval, as well as the likely date of the most recent earthquake. Our new slip rate estimates are somewhat lower than, but comparable within error to, previous geologic estimates based on soil morphology and geodetic estimates from GPS, but the new record of surface ruptures exposed in the trenches is the most complete and comprehensively dated earthquake history yet determined for this fault. Together with new and existing mapping of tectonically generated geomorphology along the ABF, our constraints
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U-Series Transport Studies at the Pena Blanca, Mexico Natural Analog Site
Energy Technology Data Exchange (ETDEWEB)
A. M. Simmons; M. T. Murrell
2001-05-31
Natural analogs provide a line of evidence that supports the understanding of how natural and engineered processes would occur over long time frames and large spatial scales at a potential nuclear waste repository at Yucca Mountain, Nevada. Studies of U-series disequilibria within and around uranium deposits can provide valuable information on the timing of actinide mobility and hence the stability of a potential repository over geologic time scales. The Nopal I uranium deposit at Pena Blanca, Mexico, is situated in unsaturated tuff that is similar in composition to the Topopah Spring Tuff of Yucca Mountain and closely matches other evaluation criteria for suitable natural analogs. By modeling the observed radioactive isotope disequilibria at Nopal I, we can estimate the rates of sorption-desorption and dissolution-precipitation of the radionuclides over time. Such information is vital to the testing or validation of performance assessment models for geologic nuclear waste disposal.
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U-Series Transport Studies at the Pena Blanca, Mexico Natural Analog Site
International Nuclear Information System (INIS)
Simmons, A. M.; Murrell, M. T.
2001-01-01
Natural analogs provide a line of evidence that supports the understanding of how natural and engineered processes would occur over long time frames and large spatial scales at a potential nuclear waste repository at Yucca Mountain, Nevada. Studies of U-series disequilibria within and around uranium deposits can provide valuable information on the timing of actinide mobility and hence the stability of a potential repository over geologic time scales. The Nopal I uranium deposit at Pena Blanca, Mexico, is situated in unsaturated tuff that is similar in composition to the Topopah Spring Tuff of Yucca Mountain and closely matches other evaluation criteria for suitable natural analogs. By modeling the observed radioactive isotope disequilibria at Nopal I, we can estimate the rates of sorption-desorption and dissolution-precipitation of the radionuclides over time. Such information is vital to the testing or validation of performance assessment models for geologic nuclear waste disposal
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Directory of Open Access Journals (Sweden)
CICUTTIN GL
2017-06-01
Full Text Available Las enfermedades caninas causadas por protozoarios y transmitidas por garrapatas representan un importante problema en medicina veterinaria. El objetivo del estudio fue detectar molecularmente Hepatozoon spp., Babesia spp. y Theileria spp. en perros clínicamente sanos de distintas regiones de Argentina y analizar la diversidad genética de los hallazgos obtenidos. Se analizaron 163 muestras de ADN de sangre de perros (40 de Ciudad Autónoma de Buenos Aires; 33 de Bahía Blanca, Buenos Aires; 15 de Castelli, Chaco; 27 de Salsipuedes, Córdoba; 40 de Merlo, San Luis; y 8 de San Miguel, Corrientes. Mediante una PCR que amplifica un fragmento variable (460-540 pb del gen ARNr 18S incluyendo la región V4 de los géneros Hepatozoon, Babesia y Theileria, el 12,1 % (4/33 de los perros de Bahía Blanca (Buenos Aires resultaron positivos. Las secuencias obtenidas se identificaron como Hepatozoon canis y resultaron filogenéticamente similares a hallazgos en Sudamérica y en el resto del mundo. El estudio de H. canis en Argentina mediante técnicas moleculares de diagnóstico junto con el análisis filogenético resulta de suma importancia para conocer la situación de este patógeno en el país. SUMMARY. Molecular detection and phylogenetic analysis of Hepatozoon canis (Eucoccidiorida: Haemogregarinidae infecting healthy dogs from Bahia Blanca (Buenos Aires. Tick-borne protozoan canine diseases represent a major problem in veterinary medicine. The aim of the study was to detect molecularly Hepatozoon spp., Babesia spp. and Theileria spp. in clinically healthy dogs from different regions of Argentina and to analyze the genetic diversity of the findings. DNAs extracted from 163 blood samples from dogs (40 from Buenos Aires city; 33 from Bahia Blanca, Buenos Aires; 15 from Castelli, Chaco; 27 from Salsipuedes, Córdoba; 40 from Merlo, San Luis; and 8 of San Miguel, Corrientes were studied by PCR amplifying a variable fragment (460-540 bp of the 18S r
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1984-05-01
Report Oil Adobe/Frates Ranch Project, City of Petaluma, April 1981. Sedway Cooke and Angus McDonald Associates, Petaluma Wastewater Irrigation Study...Vallejo contribute to City revenues via a franchise tax, the total of iich for the 1981-1982 Budget is expected to be $410,472 a year, or $13.69 per...493,200 -- Transient Occupancy Tax 156,600 .,Real Property Conveyance Tax 285,800 Business License Tax 66,400 Franchise Fees 61,600 Vehicle in-Lieu Fee
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La mujer en el subsector del alojamiento: el caso de la Costa Blanca (Alicante, España)
Sigüenza, María Carmen
2011-01-01
El artículo se acerca, desde la perspectiva de género, al mercado laboral general, y al relacionado con el alojamiento en particular, en la Costa Blanca (España). Dentro de la empresa hotelera, se centra en su organigrama y la integración por género de los diferentes departamentos que lo componen; también se analizará la integración horizontal y vertical, teniendo en cuenta la posición de las mujeres en los puestos operativos, intermedios y directivos. Este artículo propone el estudio de una ...
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Soil-water retention curve and beginning of monitoring in Tierra Blanca Joven (TBJ)
International Nuclear Information System (INIS)
Chavez, Jose A.; Lopez, Reynaldo; Kopecky, Lubomir; Landaverde, Jose
2013-01-01
The areas covered by the Tierra Blanca Joven volcanic tephra (TBJ) have suffered hillside movements, liquefaction and erosion causing important environmental, social and economic losses during the rainy season or when earthquakes occur in El Salvador. Suction values of a TBJ drop unit were obtained with the pressure cooker, centrifuge and filter paper to construct the Soil-Water Retention Curve to initiate the characterization of these partially saturated soils. The use of this curve in finite element programs has helped to know the shear stresses and permeability. The filter paper has proved to be a practical method but it is necessary to use the pressure cooker as it becomes saturated. Field tests with tensiometer (suction) and TMS3 (humidity) have been carried out to propose field methodology for an early warning system for hillsides, which can help urban planning and risk studies. (author)
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Directory of Open Access Journals (Sweden)
H.P. Cronje
2002-01-01
Full Text Available Five years of mortality data of impala Aepyceros melampus, blue wildebeest Connochaetes taurinus, buffalo Syncerus caffer and kudu Tragelaphus strepsiceros have been used to describe the minimum mortality profiles of the respective species in an open savanna system with the full compliment of predators. Predation is the principle cause of natural mortalities on the study site, Letaba Ranch, which is adjacent to the Kruger National Park. The principle cause of impala mortality are leopards Panthera pardus and wild dogs Lycaon pictus. Lion Panthera leo were major contributors to the mortality of wildebeest and buffalo. Anthrax Bacillus anthracis was the main cause of kudu mortality.
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Directory of Open Access Journals (Sweden)
Cathy Hair
2016-05-01
Full Text Available Hatchery-cultured juveniles of the commercial holothurian, sandfish (Holothuria scabra, were used for release experiments in a variety of marine habitats under traditional marine tenure near Kavieng, Papua New Guinea (PNG. Juveniles of approximately 4 g mean weight were released inside 100 m2 sea pens installed within seagrass meadows nearby partner communities, under the care of local ‘wardens’. Within each sea pen, varying levels of protection (free release, 1-day cage and 7-day cage were provided at release in order to determine if short-term predator exclusion improved survival. Ossicles of juvenile sandfish were tagged with different fluorochromes for each treatment and sandfish survival and growth was recorded after release. A range of biophysical parameters were recorded at the four sites. Contrary to expectations, short-term cage protection did not lead to higher survival at three sites, while a fourth site, despite meeting all considered criteria for suitable release habitat, experienced total loss of juveniles. There were significant differences in mean weight of juveniles between sites after four months. Multivariate analysis of biophysical factors clearly separated the sea pen habitats, strongly differentiating the best-performing site from the others. However, further research is needed to elucidate which biophysical or human factors are most useful in predicting the quality of potential sea ranch sites. Methods developed or refined through these trials could be used to establish pilot test plots at potential ranching sites to assess site suitability and provide guidance on the level of animal husbandry required before commencing community sea ranching operations in New Ireland Province, PNG. Keywords: Holothuria scabra, Mariculture, Sea pens, Predator exclusion, Principal components analysis, Biophysical variables
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Long-term surveillance plan for the Collins Ranch disposal site, Lakeview, Oregon
International Nuclear Information System (INIS)
1994-08-01
This long-term surveillance plan (LTSP) for the Uranium Mill Tailings Remedial Action (UMTRA) Project Collins Ranch disposal site, Lakeview, Oregon, describes the surveillance activities for the disposal cell. The U.S. Department of Energy (DOE) will carry out these activities to ensure that the disposal cell continues to function as designed. This final LTSP was prepared as a requirement for acceptance under the U.S. Nuclear Regulatory Commission (NRC) general license for custody and long-term care of residual radioactive materials. This LTSP documents whether the land and interests are owned by the United States and details how long-term care of the disposal site will be carried out. It is based on the DOE's Guidance for Implementing the UMTRA Project Long-term Surveillance Program (DOE, 1992a)
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Wisconsin Univ., Madison. Coll. of Agricultural and Life Sciences.
Students grades 4-8 can use this guide to explore the topics of water, and water conservation on a farm or ranch, while conducting an environmental community service project. Youth groups, led by a group leader, work with local experts from business, government, or environmental organizations to complete the project. Nine activity sections involve…
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Numerical analysis of a proposed percolation experiment at the Pena Blanca natural analog site
International Nuclear Information System (INIS)
Green, R.T.; Rice, G.
1995-01-01
A field-scale percolation test is proposed for the Pena Blanca natural analog site near Chihuahua, MX. To aid in design of the field test, the V-TOUGH two-phase flow simulator was applied to model percolation of water through 8 to 10 m of partially saturated fractured tuff. The rock was characterized as a composite medium using measured hydraulic properties for the rock matrix and estimated values for the fractures. Measured matrix permeability varied over four orders of magnitude and fracture apertures were estimated to range from 10 to 1,000 μm. Water arrival times were predicted to vary between one day to 10,000 yr. The utility of the composite model and other representations of flow through fractured porous media can be tested using results from the field scale infiltration test data
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Goff, F.; Kelley, S. A.; Lawrence, J. R.; Cikowski, C. T.; Krier, D. J.; Goff, C. J.; McLemore, V. T.
2011-12-01
Nogal Peak quadrangle is located in the northern Sierra Blanca Igneous Complex (SBIC) and contains most of the White Mountain Wilderness (geologic map is available at http://geoinfo.nmt.edu/publications/maps/geologic/ofgm/details.cfml?Volume=134). The geology of the quad consists of a late Eocene to Oligocene volcanic pile (Sierra Blanca Volcanics, mostly alkali basalt to trachyte) intruded by a multitude of dikes, plugs and three stocks: Rialto, 31.4 Ma (mostly syenite), Three Rivers, ca. 29 to 27 Ma (quartz syenite intruded by subordinate alkali granite), and Bonito Lake, 26.6 Ma (mostly monzonite). Three Rivers stock is partially surrounded by alkali rhyolites that geochemically resemble the alkali granites. The circular shape of the stock and surrounding rhyolites suggests they form the root of a probable caldera. SBIC rocks have compositions typical of those found within the Rocky Mountain alkaline belt and those associated with continental rift zone magmatism. Because the volcanic host rocks are deeply eroded, intrusive relations with the stocks are well exposed. Most contacts at stock margins are near vertical. Roof pendants are common near some contacts and stoped blocks up to 700 m long are found within the Three Rivers stock. Contacts, pendants and stoped blocks generally display some combination of hornfelsing, brecciation, fracturing, faulting and mineralization. Sierra Blanca Volcanics display hydrothermal alteration increasing from argillic in the NW sector of the quad to high-temperature porpylitic near stock margins. Retrograde phyllic alteration occurs within breccia pipes and portions of the stocks. Mineral deposits consist of four types: Placer Au, fissure veins (mostly Ag-Pb-Zn±Au), breccia pipes (Au-Mo-Cu), and porphyry Mo-Cu. A singular pipe on the SW margin of Bonito Lake stock contains sapphire-lazulite-alunite. Although Au has been intermittently mined in the quad since 1865, best production of Au originated around the turn of the last
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New geologic slip rates for the Agua Blanca Fault, northern Baja California, Mexico
Gold, P. O.; Behr, W. M.; Fletcher, J. M.; Hinojosa-Corona, A.; Rockwell, T. K.
2015-12-01
Within the southern San Andreas transform plate boundary system, relatively little is known regarding active faulting in northern Baja California, Mexico, or offshore along the Inner Continental Borderland. The inner offshore system appears to be fed from the south by the Agua Blanca Fault (ABF), which strikes northwest across the Peninsular Ranges of northern Baja California. Therefore, the geologic slip rate for the ABF also provides a minimum slip rate estimate for the offshore system, which is connected to the north to faults in the Los Angeles region. Previous studies along the ABF determined slip rates of ~4-6 mm/yr (~10% of relative plate motion). However, these rates relied on imprecise age estimates and offset geomorphic features of a type that require these rates to be interpreted as minima, allowing for the possibility that the slip rate for the ABF may be greater. Although seismically quiescent, the surface trace of the ABF clearly reflects Holocene activity, and given its connectivity with the offshore fault system, more quantitative slip rates for the ABF are needed to better understand earthquake hazard for both US and Mexican coastal populations. Using newly acquired airborne LiDAR, we have mapped primary and secondary fault strands along the segmented western 70 km of the ABF. Minimal development has left the geomorphic record of surface slip remarkably well preserved, and we have identified abundant evidence meter to km scale right-lateral displacement, including new Late Quaternary slip rate sites. We verified potential reconstructions at each site during summer 2015 fieldwork, and selected an initial group of three high potential slip rate sites for detailed mapping and geochronologic analyses. Offset landforms, including fluvial terrace risers, alluvial fans, and incised channel fill deposits, record displacements of ~5-80 m, and based on minimal soil development, none appear older than early Holocene. To quantitatively constrain landform ages
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Directory of Open Access Journals (Sweden)
F. De la Vega
2013-01-01
Full Text Available Interest in the preservation of autochthonous breeds such as the Blanca Andaluza goat (meat breed, raised under grazing-based management, has recently increased among Spanish farmers. A study of the possibilities of transformation to organic production needs to analyze the quality of their products. The aim of this study was to evaluate the fatty acid (FA composition of muscle and adipose tissues of Blanca Andaluza goat kids under organic and conventional grazing–based management system. Twenty-four twin kids (12 males, 12 females were selected from each system. The FA profile was determined in the longissimus thoracis muscle, kidney and pelvic fat. The percentages of C17:0, C17:1, C20:1, C20:4 n-6, C22:2 and several n-3 FAs were higher in organic meat; C12:0, C18:1 trans-11, CLA and C20:5 n-3 were lower in organic meat. The fat depots from the conventional kids showed lower percentages of C12:0, C14:0, C15:0, C17:0, C17:1, C18:3 n-3 and atherogenicity index, and higher percentage of C18:0. In the pelvic fat, the conventional kids displayed lower percentages of C16:0, C18:2 n-6 cis, PUFA, n-3 and n-6 FAs, and greater percentages of C18:1 n-9 cis and MUFA. The conventional kids displayed a major n6:n3 ratio in the kidney fat. No gender differences were observed. Significant differences were found only in some FA percentages of muscle and adipose tissues of suckling kids raised in organic and conventional livestock production systems, and due to this reason conventional grazing–based management farms could easily be transformed into organic production.
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Directory of Open Access Journals (Sweden)
Belem AMG.
2009-01-01
Full Text Available Gastro-intestinal parasites of antelopes and buffalos (Syncerus caffer brachyceros from the Nazinga game ranch in Burkina Faso. Parasitological survey done on the digestive tracts of antelopes [roans (Hippotragus equinus koba, hartebeests (Alcelaphus buselaphus major, defassa waterbucks (Kobus ellipsiprymnus defassa, oribis (Ourebia ourebi quadriscopa] and buffalos (Syncerus caffer brachyceros from the Nazinga game ranch in Burkina Faso allowed the identification of gastrointestinal parasites and the estimation of their prevalence and load. Nine different nematode species and three cestode species were found. Females and larvae of Cooperia were not identified up to the species level and were recognized as Cooperia spp. The nematode species found were: Haemonchus contortus, Trichostrongylus axei, Cooperia curticei, Cooperia spatulata, Skrjabinema sp., Trichostrongylus colubriformis, Trichuris ovis, Bunostomum phlebotomum, and Oesophagostomum sp. Cestodes’ species were: Moniezia expansa, Avitellina centripunctata, and Stilesia globipunctata. It was also noted without a thorough investigation the presence of Setaria labiato-papillosa in the abdominal cavity and paramphistomes in the rumen. In spite of the presence of parasites on the antelopes and buffalos, their killing out percentages (47.5 to 54.7% indicated a good physical status.
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Energy Technology Data Exchange (ETDEWEB)
Hempel, M. [Dept. of Environmental Process Engineering, International Graduate School Zittau, Zittau (Germany); Botte, S.E. [Area de Oceanografia Quimica, Inst. Argentino de Oceanografia (IADO), CCT-CONICET, Bahia Blanca (Argentina); Dept. de Biologia, Bioquimica y Farmacia (DBBF), Univ. Nacional del Sur (UNS), Bahia Blanca (Argentina); Negrin, V.L.; Chiarello, M.N. [Area de Oceanografia Quimica, Inst. Argentino de Oceanografia (IADO), CCT-CONICET, Bahia Blanca (Argentina); Marcovecchio, J.E. [Area de Oceanografia Quimica, Inst. Argentino de Oceanografia (IADO), CCT-CONICET, Bahia Blanca (Argentina); Facultad Regional Bahia Blanca (UTN-FRBB), Univ. Tecnologica Nacional, Bahia Blanca (Argentina); Univ. FASTA, Mar del Plata (Argentina)
2008-10-15
Background, aim, and scope Bahia Blanca estuary is characterized by the occurrence of large intertidal areas, including both naked tidal flats and salt marshes densely vegetated with Spartina alterniflora. The estuary is strongly affected by human activities, including industrial and municipal discharges, harbor maintenance, cargo vessels and boat navigation, oil storage and processing, etc. Even numerous studies have reported the occurrence and distribution of heavy metals in sediments and biota from this estuary, although the function of the halophyte vegetation on metals distribution was at present not studied. The main objective of the present study was to understand the potential role of the salt marshes as a sink or source of metals to the estuary, considering both the obtained data on metal levels within sediments and plants from the studied areas at naked tidal as well as vegetated flats. Conclusions and recommendations Considering the comments on the previous paragraphs, salt marshes from Bahia Blanca estuary are sources or sinks for metals? It can be sustained that both are the case, even if it is often stated that wetlands serve as sinks for pollutants, reducing contamination of surrounding ecosystems (Weis and Weis, Environ Int 30:685-700, 2004). In the present study case, the sediments (which tend to be anoxic and reduced) act as sinks, while the salt marshes can become a source of metal contaminants. This is very important for this system because the macrophytes have been shown to retain the majority of metals in the underground tissues, and particularly in their associated sediments. This fact agreed well with previous reports, such as that from Leendertse et al., (Environ Pollut 94:19-29, 1996) who found that about 50% of the absorbed metals were retained in salt marshes and 50% was exported. Thus, keeping in mind the large spreading of S. alterniflora salt marshes within Bahia Blanca estuary, it must be carefully considered as a redistributor of
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Soil-water retention curve and beginning of monitoring in Tierra Blanca Joven (TBJ)
International Nuclear Information System (INIS)
Chavez, Jose; Lopez, Reynaldo; Kopecky, Lubomir; Landaverde, Jose
2013-01-01
The areas covered by the volcanic tephras Tierra Blanca Joven (TBJ) in El Salvador, was suffered mass movements, liquefaction and erosion during the rainy season or when major earthquakes occur, causing important environmental, social and economic losses. A pressure plate, centrifuge and filter paper were used to build a Soil-Water Retention Curve, obtain the characterization of these unsaturated soil, suction values of the fall unit of TBJ. The use of this curve into finite elements software can help to acquire shear strength and permeability properties. The filter paper showed to be a practical method but close to saturation the pressure plate is needed.Scatter results were observed with the centrifuge. The Quickdraw tensiometre (suction) and TMS3 (soil moisture content) are being used in field test to proposed a field methodology for an early warning system for the slopes, that could help in urban planning and risk assessment. (author)
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Evidence for Multiple Late Quaternary Glaciations in the Southernmost Cordillera Blanca, Peru
Smith, J. A.; Rodbell, D. T.; Ramage, J. M.
2007-12-01
Surface-exposure dating with in-situ-produced cosmogenic isotopes has provided the basis for a growing framework of glacial chronologies in the tropical Andes. In the Peruvian Andes, long chronologies (>400 ka) with relatively small local last glacial maximum (LLGM) advances have been reported for the central Cordillera Blanca (ca. 9°30'S) and Junin Plain (11°00'S), whereas preliminary data suggest a shorter record (<40 ka) in the intervening Cordillera Huayhuash (10°15'S). These seemingly contradictory findings raise several questions: Was the LLGM a relatively minor event in the Peruvian Andes, far exceeded by bigger, older advances? Which combination of geographic and geomorphic factors increases the likelihood that evidence of older advances will be preserved? With these questions in mind, we sought a site with both high peaks and a high-altitude plateau. The glaciated Nevado Jeulla Rajo massif (10°00'S, 77°16'W, peaks ca. 5600 masl) marks the southern end of the Cordillera Blanca and the Callejon de Huaylas valley in the central Peruvian Andes. The Conococha Plain (ca. 4050 masl) borders the western side of the massif. Large lateral moraines extend onto the Conococha Plain from the west-facing valleys and multiple moraine loops lie upvalley, closer to active ice margins. Surface-exposure dating (10Be) indicates that the largest lateral moraines from Jeullesh Valley are compound features deposited during the LLGM (ca. 30 ka) and a late-glacial readvance (ca. 16 ka). The LLGM/late-glacial moraines cross-cut an older pair of lateral moraines (ca. 70 ka) that may provide evidence for a smaller advance during marine isotope stage 4. Although the LLGM/late-glacial moraines are impressively large (ca. 150 m high), they do not represent the maximum ice extent in the region. Fluvial outwash deposits beyond the termini of the moraines on the Conococha Plain are underlain by lodgement till that is up to 20 m thick and extends ca. 6 km across the width of the Plain
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La educación de las mujeres en dos novelas peruanas del siglo XIX : Herencia y Blanca Sol
Bustamante Oliva, Lita Giannina
2015-01-01
Esta investigación describe la situación de la educación de las mujeres peruanas de la élite limeña a partir de la segunda mitad del siglo XIX. Analizando los aspectos educativos presentados en las novelas Herencia y Blanca Sol, de Clorinda Matto de Turner y Mercedes Cabello de Carbonera respectivamente, se explican e interpretan las características de la educación que se ofrecía a niñas y jóvenes en la capital del Perú. Por un lado, los colegios privados de la época presentaban tanto un curr...
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Eficiencia del transporte urbano de pasajeros en la localidad de Bahía Blanca, Argentina 2007-2014
Viego, Valentina; Universidad Nacional del Sur; Volonté, Carolina; Universidad Nacional del Sur,
2016-01-01
El objetivo de este artículo es evaluar la eficiencia en la prestación del servicio de transporte urbano por colectivo en la ciudad de Bahía Blanca, Argentina. Las estimaciones se realizaron mediante la aplicación del método de frontera estocástica a una función de producción con datos de panel para el período 2007-2014. Los resultados indican que el nivel medio de eficiencia no varió significativamente durante el período analizado. Asimismo, las transferencias monetarias y la concentración d...
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International Nuclear Information System (INIS)
Ruiz Suescun, Oscar Andres; Acosta Jaramillo, Juan Jose; Leon Pelaez, Juan Diego
2005-01-01
In natural montane oak forests (Quercus humboldtii Bonpl.), pine (Pinus patula Schltdl and cham.) and cypress (Cupressus lusitanica Mill.) plantations in the region of Piedras Blancas, Antioquia, surface runoff flows (SRF) were measured over 16 months. Runoff was measured using 2 m wide x 10 m long runoff bounded plots, collector tanks and a volumetric counter system. Nutrient flows for the oak forest, pine and cypress plantations were, respectively: P total (0,51, 0,08 and 0,42 kg ha-y), Ca (0,13, 0,21 and 1,27 kg ha- y); Mg (0,07, 0,07 and 0,34 kg ha-y); K (0,89, 0,71 and 2,60 kg ha-y); Fe (0,04, 0,04 and 0,47 kg ha-y) and Mn (0,01, 0,01 and 0,08 kg ha-y)
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Hofer, Marlis; MöLg, Thomas; Marzeion, Ben; Kaser, Georg
2010-06-01
Recently initiated observation networks in the Cordillera Blanca (Peru) provide temporally high-resolution, yet short-term, atmospheric data. The aim of this study is to extend the existing time series into the past. We present an empirical-statistical downscaling (ESD) model that links 6-hourly National Centers for Environmental Prediction (NCEP)/National Center for Atmospheric Research (NCAR) reanalysis data to air temperature and specific humidity, measured at the tropical glacier Artesonraju (northern Cordillera Blanca). The ESD modeling procedure includes combined empirical orthogonal function and multiple regression analyses and a double cross-validation scheme for model evaluation. Apart from the selection of predictor fields, the modeling procedure is automated and does not include subjective choices. We assess the ESD model sensitivity to the predictor choice using both single-field and mixed-field predictors. Statistical transfer functions are derived individually for different months and times of day. The forecast skill largely depends on month and time of day, ranging from 0 to 0.8. The mixed-field predictors perform better than the single-field predictors. The ESD model shows added value, at all time scales, against simpler reference models (e.g., the direct use of reanalysis grid point values). The ESD model forecast 1960-2008 clearly reflects interannual variability related to the El Niño/Southern Oscillation but is sensitive to the chosen predictor type.
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McLaughlin, R. J.; Vazquez, J. A.; Fleck, R. J.; DeLong, S.; Sarna-Wojcicki, A.; Wan, E.; Powell, C., II; Prentice, C. S.
2012-12-01
The marine to non-marine transgressional - regressional Ohlson Ranch Formation of northern California was deposited mainly east of the San Andreas Fault and the Gualala structural block during Pliocene sea level high stands. The formation transitions eastward from marine to fluvial deposits and the marine strata are deposited on a mildly warped, pholad-bored erosional surface cut near Pliocene sea level (probably above storm wave-base), on rocks of the Coastal and Central belts of the Franciscan Complex. West of the San Andreas fault near Point Arena, a right-laterally displaced remnant of the wave-cut surface occurs at ca. 100m above modern sea level. East of the fault this surface varies in elevation from ca. 200-350m and a 12-15 cm thick light gray silicic tephra, the ash of Ohlson Ranch (AOR) locally occurs ~10m above the base of the marine section. The AOR consists of very fine-grained glass shards with conspicuous brown biotite in the upper 2 cm and rare co-magmatic clinopyroxene, hornblende and euhedral, weakly zoned zircons. The zircons are relatively uniform in size and little abraded, suggesting they are primary and not re-worked. The fine-grained nature of the AOR deposit suggests it is water lain and chemical analysis of the volcanic glass indicates that the eruptive source was in the southern Cascade Range. We analyzed both polished section mounts of zircon crystals and unpolished rims by ion microprobe (SHRIMP-RG) and LA-ICPMS in order to establish a precise U-Pb age for the AOR. Ages were adjusted for initial 230Th deficiency in the U-Pb chain using Th/U measured in zircon and host glass shards. Thirty-two zircon grains measured by LA-ICPMS at the University of Arizona LaserChron Center yield a mean U-Pb age of 4.58 ± 0.30 Ma (2σ , MSWD=0.53, n=23). SHRIMP analyses of zircon interiors exposed in polished epoxy-mounts yield a mean U-Pb age of 4.36 ± 0.11 Ma (2σ, MSWD 0.72, n=19). To further refine the likely eruption age of the AOR, the SHRIMP was
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Directory of Open Access Journals (Sweden)
Àlvar Peris Blanes
2015-10-01
Full Text Available Este artículo tiene como objetivo analizar de qué modo la ficción valenciana L’Alqueria Blanca, uno de los grandes fenómenos de la televisión pública autonómica de los últimos años, ha consolidado la “naturalización” de una identidad valenciana regionalista que, desde la Transición democrática, es aceptada por una mayoría social como la identidad colectiva preferente. Observaremos cómo la serie elabora un discurso memorístico sobre el pasado que entronca con el relato sobre la identidad valenciana surgido en el siglo XIX y lo lanza al presente, reforzando proyectos políticos e ideológicos concretos.Palabras clave: identidad valenciana, nacionalismo banal, ficción televisiva, Canal 9, memoria._______________________Abstract: This article aims to analyze how Valencian fiction L'Alqueria Blanca, one of the great phenomena of the regional public television in recent years, has naturalized a Valencian regionalist identity which, since the democratic Transition, is accepted by most as the preferred social collective identity. We’ll try to observe how the series develops a rote speech about the past that connects with the story of the Valencian identity emerged in the nineteenth century which has been thrown to the present, strengthening political and ideological concrete projects.Keywords: Valencian identity, banal nationalism, TV drama, Canal 9, memory.
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This report documents the activities performed during and the results obtained from the first six months of the point of use arsenic removal treatment technology demonstration project at the Sunset Ranch Development in Homedale, ID. The objectives of the project are to evaluate t...
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Yu. Volichenko
2015-12-01
Full Text Available Purpose. To investigate the hematological characteristics of blood young-of-the-year carps reared using fish ranching technology in the southern Ukraine and to establish certain correlations between the main fish technical features of the studied groups of the young-of-the-year fish. Methodology. The studies were based on field and experimental methods adopted for fisheries, biochemical and statistical studies. Findings. The paper contains the data on mean fish weight, hematological and biochemical parameters of serum of young-of-the-year carps reared using fish ranching technology. Based on a comparative analysis of the obtained data, we detected significant peculiarities and qualitative difference in the absence of foam cells and basophils, which distinguish carp from the group of herbivorous fish, established significant correlations between mean fish weight and hematologic indices of blood. Marked by fish-breeding relationships with signs like weight and some parameters of blood components in all studied fish: hemoglobin in the range from 0.7858 to 0.9943, number of erythrocytes from 0.7843 to 0.9942, lymphocytes from 0.7848 to 0.9949, сholеsterol from 0.7640 to 0.9616 and triglycerides of 0.7499 in silver carp (Hypophthalmichthys molitrix and 0.9616 in common carp (Cyprinus carpio carpio. To show these relationships graphically, we used regression analysis and the obtained regression equations can give an accurate assessment of the quality of fish seeds through hematological blood parameters and mean weight. Originality. The analysis of hematological parameters of blood of young-of-the-year carps: common carp (Cyprinus carpio carpio, silver carp (Hypophthalmichthys molitrix, bighead carp (Hypophthalmichthys nobilis, grass carp (Ctenopharyngodon idella reared using fish ranching technology in the south of Ukraine was performed for the first time. Practical value. The obtained data allow scientifically recommending them as a component of
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A. Emmer
2013-06-01
Full Text Available Glacial lake outburst floods (GLOFs and related debris flows represent a significant threat in high mountainous areas across the globe. It is necessary to quantify this threat so as to mitigate their catastrophic effects. Complete GLOF hazard assessment incorporates two phases: the probability of water release from a given glacial lake is estimated through lake and breach hazard assessment while the endangered areas are identified during downstream hazard assessment. This paper outlines a number of methods of lake and breach hazard assessment, which can be grouped into three categories: qualitative, of which we outline eight; semi-quantitative, of which we outline two; and quantitative, of which we outline three. It is considered that five groups of critical parameters are essential for an accurate regionally focused hazard assessment method for moraine-dammed lakes in the Cordillera Blanca. These comprise the possibility of dynamic slope movements into the lake, the possibility of a flood wave from a lake situated upstream, the possibility of dam rupture following a large earthquake, the size of the dam freeboard (or ratio of dam freeboard, and a distinction between natural dams and those with remedial work. It is shown that none of the summarised methods uses all these criteria with, at most, three of the five considered by the outlined methods. A number of these methods were used on six selected moraine-dammed lakes in the Cordillera Blanca: lakes Quitacocha, Checquiacocha, Palcacocha, Llaca, Rajucolta, and Tararhua. The results have been compared and show that each method has certain advantages and disadvantages when used in this region. These methods demonstrate that the most hazardous lake is Lake Palcacocha.
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Czech Academy of Sciences Publication Activity Database
Klimeš, Jan; Benešová, M.; Vilímek, V.; Bouška, P.; Rapre, A.C.
2014-01-01
Roč. 71, č. 3 (2014), s. 1617-1638 ISSN 0921-030X R&D Projects: GA ČR(CZ) GAP209/11/1000 Institutional support: RVO:67985891 Keywords : GLOFs * debris flow * natural hazard * HEC-RAS * Cordillera Blanca Subject RIV: DE - Earth Magnetism, Geodesy, Geography Impact factor: 1.719, year: 2014
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Roberto Germano Costa
2010-02-01
Full Text Available Objetivou-se avaliar a influência do sexo e do sistema de produção nas características de carcaça de caprinos da raça Blanca Serrana Andaluza. Foram utilizados 31 animais, 12 machos e 19 fêmeas, distribuídos nos sistemas de produção intensivo (15 animais e extensivo (16 animais. Não foi observada diferença no desempenho, no peso de carcaça e no escore corporal entre os sexos nem entre os sistemas de produção, contudo, os rendimentos de carcaça quente e fria foram maiores nos animais terminados em confinamento. As medidas de carcaça não diferiram entre os sistemas de produção, exceto o comprimento interno, que foi maior nos animais criados no sistema intensivo. O percentual dos não-constituintes da carcaça sofreu pouca variação em relação ao sexo e aos sistemas de criação avaliados. As maiores proporções de gordura perirrenal foram encontradas nas fêmeas e nos animais produzidos em confinamento. Pouca variação foi observada para os cortes paleta, pescoço e serrote, embora o percentual de perna tenha sido maior nos animais produzidos a pasto. O sistema extensivo, predominantemente usado por criadores da raça Blanca Serrana Andaluza na Espanha, permite obter carcaças com características similares às dos animais criados em confinamento e, em virtude da significativa redução dos custos com alimentação, obtida com os animais exclusivamente a pasto, pressupõe-se que esse sistema seja mais economicamente viável.The objective of this study was to evaluate the influence of gender and production system on the carcass characteristics of Blanca Serrana Andaluza goats. Thirty-one animals were used, 12 males and 19 females, distributed in intensive (15 animals and extensive (16 animals production systems. No difference was observed in performance, carcass weight and body score between the gender or production system but the hot and cold carcass yields were greater for the animals finished in a feedlot. The carcass
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Directory of Open Access Journals (Sweden)
Andrés Pinassi
2012-06-01
Full Text Available El presente trabajo forma parte del Proyecto General de Investigación: “Turismo y desarrollo: nuevos escenarios en la gestión integral de destinos turísticos en el Sudoeste bonaerense. Parte II”, que se lleva a cabo en el Departamento de Geografía y Turismo de la Universidad Nacional del Sur (Bahía Blanca, Argentina. El mismo tiene como objetivo: presentar un diagnóstico integral acerca de la utilización del centro histórico de la ciudad de Bahía Blanca como espacio de ocio, concentrador del patrimonio cultural local. Dicho análisis forma parte del Plan de Marketing Turístico desarrollado para el sector urbano bajo estudio, con el fin de dotarlo de mayor dinamismo y consolidarlo como lugar de encuentro, tanto para residentes como visitantes.
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Las arquitecturas pintadas, cuando Málaga no era blanca.
Directory of Open Access Journals (Sweden)
Eduardo Asenjo Rubio
2013-01-01
Full Text Available Se atribuye a Confucio la cita, Todo tiene belleza, pero no todos la ven, y Rosario Camacho Martínez hace justicia a ese memento filosófico, pues con su magisterio ejercido desde el Departamento de Historia del Arte de la Universidad de Málaga, y su amplio conocimiento sobre las arquitecturas pintadas, hizo que muchas personas e instituciones que no veían más allá de la imperfección e incorrección técnica de este legado cultural comenzaran a valorarlo de forma positiva. Precisamente, el artículo «Cuando Málaga no era blanca: La arquitectura pintada del siglo XVIII», publicado en la revista Boletín de Arte en el año 1993 fue el inicio de muchas cosas positivas que Rosario Camacho ha aportado, no solo al conocimiento científico, sino también a la propia ciudad de Málaga. Desde esa tribuna literaria que tanta satisfacciones personales y académicas le ha dado durante toda su vida explicó su característica forma de abordar este singular patrimonio: rigor científico, análisis del dato, metodología clara y comunicación del conocimiento de forma asequible y comprensible, características ampliamente elogiadas por el desaparecido y añorado maestro Juan Antonio Ramírez, a quien le unía una estrecha amistad y un profundo reconocimiento.
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International Nuclear Information System (INIS)
Barreto Sanchez, Luis Hernan; Leon Pelaez, Juan Diego
2005-01-01
In the Piedras Blancas region, Antioquia - Colombia, a sampling of fine roots K > Mg > Fe > P this study sought to highlight the importance of fine roots and their concentrations of nutrients in natural forests and plantations and their relationship with nutrient cycling. For this purpose, the methodological approach comprised total root mass, both dead and alive
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Directory of Open Access Journals (Sweden)
Carlos Andrés Pinassi
2015-10-01
Full Text Available Este trabajo incluye una serie de reflexiones relativas a diferentes investigaciones realizadas en la ciudad de Bahía Blanca (Rep. Argentina, concernientes al patrimonio cultural y su gestión. El área de estudio la configura el centro histórico de la localidad, definido en el año 1986 en uno de los primeros instrumentos de planificación a escala local, y luego legitimado por el Inventario de Patrimonio Urbano Municipal, llevado a cabo en 1992. Los caracteres propios del espacio determinan la convivencia de sitios patrimoniales con aquellos derivados del proceso de crecimiento de la aglomeración, articulando usos y actividades dispares en un mismo lugar. En este contexto, se identifica un “centro histórico no consolidado” estructurado sobre criterios rígidos, en el que se superponen funcionalidades y se visualizan disímiles unidades de paisaje urbano que carecen de integración. CENTROS HISTÓRICOS NÃO CONSOLIDADOS: Um desafio para a gestão do patrimônio. O caso de Bahía Blanca (Argentina Resumo Este trabalho inclui uma série de reflexões relacionadas a diferentes investigações realizadas na cidade de Bahía Blanca (Rep. Argentina, concernentes ao patrimônio cultural e à sua gestão. A área de estudo é configurada pelo centro histórico da cidade, definido em 1986, em um dos primeiros instrumentos de planejamento em escala local, e legitimada pelo Inventário do Patrimônio, realizado em 1992. As características específicas do setor mostram a convivência de espaços patrimoniais com aqueles derivados do processo de crescimento da aglomeração, articulando usos e atividades díspares num mesmo sítio. Neste contexto, se identifica um “centro histórico não consolidado” estruturado a partir de parâmetros rígidos, em que se superpõem funcionalidades e se visualizam diferentes unidades de paisagem urbana que carecem de integração.
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J. Jesus Sanchez-Escalante; Denise Z. Avila-Jimenez; David A. Delgado-Zamora; Liliana Armenta-Cota; Thomas R. Van Devender; Ana Lilia. Reina-Guerrero
2013-01-01
In northeastern Sonora, isolated Sky Island mountain ranges with desertscrub, desert grassland, oak woodland, and pine-oak forest have high biodiversity. El Aribabi Conservation Ranch in the Sierra Azul (from 30°51â13âN, 110°41â9âW to 30°46â38âN, 110°32â3âW) was designated a Private Protected Natural Area by the Comisión Nacional de Ãreas Naturales Protegidas in March...
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María Ángela Cifuentes Guerra
2016-12-01
Full Text Available Fruto de un trabajo conjunto, Eduardo Kingman Garcés y Blanca Muratorio exploran a lo largo de los diferentes textos que comprenden este libro el significado cultural de los trajines callejeros y otras formas de entender y estudiar las culturas urbanas. El relato, la imagen visual y el objeto se presentan como sus recursos centrales para un análisis compartido entre la historia y la antropología. Quito en su primera modernidad, entre los siglos XIX y XX, es el objeto de gran parte de sus análisis aquí expuestos.
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Ayala, Grascely; Álvarez, María; Nuñez, Miguel
2016-01-01
Objetivos: Determinar el efecto de la combinación de los barnices diacetato de clorhexidina 1 % y fluoruro de sodio 5 % sobre Streptococcus mutans en saliva de niños de 3 a 5 años con manchas blancas. Material y métodos: Se incluyeron 45 niños, divididos en 3 grupos: combinación clorhexidina 1 % y fluoruro de sodio 5 % (n=15), fluoruro de sodio 5 % (n=15) y placebo (n=15). Después de 8 semanas se evaluó microbiológicamente. Resultados: Todos los grupos redujeron significativamente los S. muta...
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Antón Álvarez Ruiz
2016-07-01
Full Text Available This article analyses the importance of the communication strategies applied by three significant social movements: Telemadrid workers’ mobilization (Madrid’s public television, the «Marea Blanca» («White Tide», which grouped up the healthcare professionals, and the «Marea Verde» («Green Tide», which was done by teachers. These movements are a practical application of the «indignados» («outraged» movement and, following the 15-M steps, they improved these strategies in what refers to communication and mobilization. For this purpose, we carried out two investigations: twelve in-depth interviews with leading members of these social movements; and an online questionnaire passed to strategic planners who are the experts in communication strategies from the advertising agencies.
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Fenología de la floración de Ulmus pumila L. (Ulmaceae en la ciudad de Bahía Blanca (Argentina
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Lucia Saveanu
2015-07-01
Full Text Available La fenología es el estudio de los fenómenos periódicos que ocurren en los seres vivos y sus relaciones con condiciones ambientales como luz, temperatura, humedad, etc. Los objetivos de este trabajo fueron describir las fases fenológicas durante la fl oración deUlmus pumilaL. para la ciudad de Bahía Blanca y relacionar la floración con datos meteorológicos de temperaturas mínimas y máximas. Durante dos periodos de floración (julio a septiembre, de 2007 y de 2008 se realizaron observaciones fenológicas semanales de ejemplares deU. pumilapresentes en el arbolado urbano de la ciudad. La fl oración se observó en los meses de julio y agosto, registrándose la máxima floración el 23 y el 7 de agosto de 2007 y 2008, respectivamente. Durante la floración del año 2007 la cantidad de flores registradas y la duración de la fase de floración fueron superiores a lo ocurrido en 2008. Estos resultados ayudan a conocer la dinámica de floración de U. pumila en la ciudad de Bahía Blanca, y a largo plazo contribuirá a la interpretación de los cambios climáticos de la región y a una mejor prevención de las alergias.
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A.G. Schmidt
1995-08-01
Full Text Available The grazing capacity of a game ranch in Northern Province was estimated in a number of different ways using rainfall and herbaceous composition and phytomass data. The results indicate that the grazing capacity under the present environmental conditions should be approximately 50 of the recommended agricultural grazer stocking rate. This is in agreement with recent literature, indicating that the methods used should be suitable for determining a first approximation of grazing capacity in the mixed bushveld of Northern Province.
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International Nuclear Information System (INIS)
Stastny, P.
2006-01-01
The oil and gas industry is attempting to blend into their surroundings in order to improve relations with landowners. This article presented details of a 7.5 million-cubic-feet-per-day gas facility disguised as a cattleman's ranch through the use of convincing facades. The compressor unit is disguised as a ranch house, while the dehydration unit looks like a carriage house. Electrical controls are housed in a separate bunkhouse. In 2001, a skid-mounted refrigeration unit was added and enclosed in a barn facade. The total cost over and above a typical metal-clad gas facility was approximately $100,000, almost 4 per cent of the total facility cost of $2.5 million. While some companies have been using colour to camouflage facilities for many years, other companies have placed more importance on noise suppression, which can add 10 to 20 per cent to the cost of each building. In order to improve noise control, some facilities are now being constructed in topographical low spots with insulated enclosures and hospital-grade mufflers. Pioneer Canada has recently camouflaged a gas facility to mimic a farm which was subsequently fitted with standard noise attenuation. The company's new standard of noise reduction has resulted in additional costs of up to $200,000 per site. Landowners have commented favourably on Pioneer Canada's camouflage efforts. It was concluded that as land access becomes an even bigger issue in some plays, operators may increasingly use architectural features to make their facilities less obtrusive. 5 figs
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Energy Technology Data Exchange (ETDEWEB)
Stastny, P.
2006-09-15
The oil and gas industry is attempting to blend into their surroundings in order to improve relations with landowners. This article presented details of a 7.5 million-cubic-feet-per-day gas facility disguised as a cattleman's ranch through the use of convincing facades. The compressor unit is disguised as a ranch house, while the dehydration unit looks like a carriage house. Electrical controls are housed in a separate bunkhouse. In 2001, a skid-mounted refrigeration unit was added and enclosed in a barn facade. The total cost over and above a typical metal-clad gas facility was approximately $100,000, almost 4 per cent of the total facility cost of $2.5 million. While some companies have been using colour to camouflage facilities for many years, other companies have placed more importance on noise suppression, which can add 10 to 20 per cent to the cost of each building. In order to improve noise control, some facilities are now being constructed in topographical low spots with insulated enclosures and hospital-grade mufflers. Pioneer Canada has recently camouflaged a gas facility to mimic a farm which was subsequently fitted with standard noise attenuation. The company's new standard of noise reduction has resulted in additional costs of up to $200,000 per site. Landowners have commented favourably on Pioneer Canada's camouflage efforts. It was concluded that as land access becomes an even bigger issue in some plays, operators may increasingly use architectural features to make their facilities less obtrusive. 5 figs.
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Variabilidad temporal del PM10 en Bahía Blanca (Argentina y su relación con variables climáticas
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Alicia M. Campo
2017-01-01
Full Text Available La contaminación atmosférica afecta a ciudades y países de todo el planeta. Uno de los conta- minantes atmosféricos más comunes es el material particulado atmosférico, que tiene directa incidencia sobre la salud de la población (OMS, 2006. Las condiciones meteorológicas definen en gran medida su concentración a nivel troposférico. Por consiguiente, el objetivo del presente trabajo es analizar la variabilidad temporal del PM10 de la ciudad de Bahía Blanca (Argentina, estableciendo posibles relaciones entre dicho comportamiento y variables físicas y antropogéni- cas que pueden incidir en su dinámica. Se observó que la concentración del material particulado en Bahía Blanca se relaciona con factores naturales y antropogénicos. El flujo vehicular y las actividades portuarias, principalmente el transporte y almacenamiento de granos, favorecen la producción del contaminante. Esto se manifiesta en una distribución diferencial a lo largo del día y entre días laborables y no laborables. La alta concentración de PM10 se ve afectada por la presencia de vientos de componente Norte y de altas velocidades, que suelen estar acompañados de nubes de polvo y humo. También fenómenos naturales, como la erupción del Complejo Vol- cánico Puyehue-Cordón Caulle, inciden en los valores hallados.
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Research on Environmental Adjustment of Cloud Ranch Based on BP Neural Network PID Control
Ren, Jinzhi; Xiang, Wei; Zhao, Lin; Wu, Jianbo; Huang, Lianzhen; Tu, Qinggang; Zhao, Heming
2018-01-01
In order to make the intelligent ranch management mode replace the traditional artificial one gradually, this paper proposes a pasture environment control system based on cloud server, and puts forward the PID control algorithm based on BP neural network to control temperature and humidity better in the pasture environment. First, to model the temperature and humidity (controlled object) of the pasture, we can get the transfer function. Then the traditional PID control algorithm and the PID one based on BP neural network are applied to the transfer function. The obtained step tracking curves can be seen that the PID controller based on BP neural network has obvious superiority in adjusting time and error, etc. This algorithm, calculating reasonable control parameters of the temperature and humidity to control environment, can be better used in the cloud service platform.
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Jomelli, V.; Grancher, D.; Brunstein, D.; Solomina, O.
2008-01-01
A new lichen dating method and new moraine observations enabled us to improve the chronology of glacier advances in the Cordillera Blanca (Peru) during the Little Ice Age (LIA). Our results reveal that an early LIA glacial advance occurred around AD 1330 ± 29. However, a second major glacial advance at the beginning of the 17th century overlapped the earlier stage for most glaciers. Hence, this second glacial stage, dated from AD 1630 ± 27, is considered as the LIA maximum glacial advance in the Cordillera Blanca. During the 17th-18th centuries, at least three glacial advances were recorded synchronously for the different glaciers (AD 1670 ± 24, 1730 ± 21, and 1760 ± 19). The moraines corresponding to the two first stages are close to the one in 1630 suggesting a slow recession of about 18% in the total length of the glacier. From the LIA maximum extent to the beginning of the 20th century, the 24 glaciers have retreated a distance of about 1000 m, corresponding to a reduction of 30% in their length. This rate is comparable to that observed during the 20th century. Estimates of palaeo-Equilibrium Line Altitudes show an increase in altitude of about 100 m from the LIA maximum glacial extension at the beginning of the 17th century to the beginning of the 20th century. Because long time series are not available for precipitation and temperature, this glacial retreat is difficult to explain by past climate changes. However, there is a fair correspondence between changes in glacier length and the δ18O recorded in the Quelccaya ice core at a century timescale. Our current knowledge of tropical glaciers and isotope variations leads us to suggest that this common tropical signal reflects a change from a wet LIA to the drier conditions of today. Finally, a remarkable synchronicity is observed with glacial variations in Bolivia, suggesting a common regional climatic pattern during the LIA.
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Müller-Hansen, Finn; Heitzig, Jobst; Donges, Jonathan F.; Cardoso, Manoel F.; Kurths, Jürgen; Thonicke, Kirsten
2017-04-01
Deforestation in the tropics - with vast consequences for the ecosystem and climate - is mainly driven by subsequent land use, which is not only determined by environmental and economic constraints but also influenced by the use of different production technologies. Inefficient production technologies can lead to excessive use of land, especially in areas where land is easily available and accessible. Here, the adoption of new technologies could help to use already converted land more intensively and ease pressures on ecologically valuable areas. In this study, we take the Brazilian Amazon as a prominent example region to explore the interplay of land-use decisions with environmental and economic dynamics in the process of land-use intensification and frontier expansion. Expansion of pasture land for cattle ranching to satisfy increasing domestic and international demands is one of the important drivers for deforestation in the Brazilian Amazon. Pasture run-down and following land abandonment further drive the expansion of deforestation frontiers into pristine forests. Therefore, intensification of livestock production, especially better pasture management, could potentially reduce deforestation. However, a number of reasons including the large spatial extent of the region make the process of comparing the effectiveness of different management techniques, technologies and policies in the region difficult. Therefore, the effectiveness and possible outcomes of policies to foster intensification are highly debated in the literature. Some authors deny that intensification policies are a viable option to spare forests as long as they are not a scarce resource [1] while others insist that intensification has an effect if only supported by the right policies [2]. In this presentation, we introduce a concise agent-based model to study conditions under which intensification can reduce deforestation and explore the trade-offs between intensified and extensive land uses
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This report documents the activities performed during and the results obtained from the arsenic removal technology demonstration project at the Sunset Ranch Development in Homedale, ID. The objectives of the project are to evaluate: 1) the effectiveness of a point of use (POU) re...
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Directory of Open Access Journals (Sweden)
María Amalia Lorda
2016-03-01
Full Text Available El desarrollo de la actividad hortícola en las ciudades argentinas se construye en un entramado que se remonta a la fundación misma de cada lugar, como una actividad propia de quienes buscan originar su propio sustento. Con el crecimiento de las ciudades, el territorio cambia, nuevos usos se observan, así como la llegada de otras personas -inmigrantes- que sin duda impregnan de especificidades a un nuevo territorio en construcción. En el periurbano de Bahía Blanca, la horticultura se nutre de distintas oleadas de inmigrantes, quienes plasman en el territorio saberes y prácticas singulares. El aporte de la geografía social francesa es de gran valor para la comprensión de las distintas lógicas socio-espaciales que suceden. El modelo de formación socio espacial que se aplica permite comprender el territorio, a partir de observaciones en el terreno y entrevistas a los actores que territorializan con sus prácticas un modo de pensar el territorio. Palabras clave: Periurbano; Territorio; Formación Socio-espacial; Actividad Hortícola. THE COMPREHENSION OF THE TERRITORY FROM THE MODEL OF FORMATION SPATIAL PARTNER FROM THE PRACTICE OF THE HORTICULTURE THE PERIURBANO OF BAHÍA BLANCA, ARGENTINA ABSTRACT The development of horticulture in the Argentine cities is built on a framework that goes back to the very foundation of every place, as an activity of those who seek to lead their own livelihood. With the growth of cities, the territory changes, new uses are observed, and the arrival of others -inmigrantes- undoubtedly imbued with specificities into new territory under construction. In the periurban horticulture Bahia Blanca, is nourished by different waves of immigrants, who reflected on the territory unique knowledge and practices. The contribution of the French social geography is of great value for the understanding of different socio-spatial logics that happen. The model of socio spatial information that applies to understanding the
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Directory of Open Access Journals (Sweden)
Ricardo Echenique
2006-12-01
Full Text Available In April 2000, alterations in drinking water quality, such as turbidity and odors similar to those of organochloride pesticides, were detected at Bahía Blanca (Argentina. This fact was associated to reports of dermic reactions and respiratory problems in the population. Samples drawn from Paso de las Piedras reservoir, two water treatment plants of at inlet and outlet points and at several particular houses were analyzed. Total phytoplankton in the reservoir varied between 49440 and 84832 cells.ml-1, while dominant species was, Anabaena circinalis. Efficiency to remove microorganisms (ER by the treatment plants considering cell number of total phytoplankton was analyzed. Bacteriological analysis, qualitative and quantitative studies of phytoplankton, pesticides, THM (trihalomethanes and BTEX (benzene, toluene, ethylbenzene and xylene analysis were carried out in samples of domestic supply and in the treatment plants. Even though samples were bacteriological potable, Anabaena circinalis and Microcystis aeruginosa algae were found at high concentrations in some cases. No pesticides were detected. THM and BTEX were below guideline values into recommendations for drinking water. Geosmin was responsible for detected odors. Besides, Copaene, another volatile metabolite, which on account in its structure could be considered a Geosmin precursor, was also detected. In Argentina, this was the first report of Cyanobacteria presence in drinking water.En abril de 2000, en Bahía Blanca (Argentina, se detectaron alteraciones en el agua de bebida, turbidez y olor semejante a "Gamexane". Esto coincidió con la aparición de problemas dérmicos y respiratorios en la población. Para determinar el origen del problema, se analizaron muestras, tomadas en el embalse Paso de las Piedras, en las plantas potabilizadoras y en varios domicilios particulares. En el embalse, la densidad celular del fitoplancton, fluctuó entre 49440 y 84832 cél/ml-1, muy por encima de
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Análisis del Clima Laboral a través de la Comunicación Interna: "Caso Industria de Línea Blanca"
Ortiz Ochoa, Melania Francisca
2013-01-01
La presente es una investigación de campo realizada en una empresa productora de línea blanca, la misma que cuenta con su matriz en la ciudad de Cuenca, La investigación está basada en el impacto de contar con un proceso de comunicación interna, inmersa en los procesos estratégicos de la organización, para conseguir un mejor resultado en el Clima Laboral organizacional. La investigación ha sido sustentado en un marco teórico práctico establecidos en lineamentos y políticas instituidas en la o...
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Plan estratégico para la producción de electrodomésticos de línea blanca en el Perú.
Cervantes Choquehuayta, Anny Stephanie; Chuquicondor Pinto, Nohelia; Gonzales Cruz, Juan Carlos; Ortiz Siu, Paul Alonso
2016-01-01
En el presente documento se elabora el Planeamiento Estratégico para la Producción de Electrodomésticos de Línea Blanca en el Perú. En el mismo se realiza una exhaustiva revisión y análisis de las variables que mueven a los productores para hacer más competitivos en un mercado dominado principalmente por la producción extranjera. El análisis de los factores internos y externos que permitieron desarrollar la matriz FODA han sido el punto de partida para analizar la situación act...
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Alexis Herminio Plasencia Vázquez
2012-01-01
Full Text Available Reportamos, por primera vez en la literatura científica, al loro frente blanca (Amazona albifrons como especie introducida en áreas urbanas de la Isla de Cozumel, Quintana Roo, durante el trabajo de campo realizado en el mes de abril de 2011. Su presencia sólo en áreas urbanas de la isla, la capacidad de la especie para poder vivir con éxito en áreas urbanas, la abundancia de árboles frutales y su uso como mascota por los isleños nos permite sugerir que los individuos registrados son resultado de escapes o fueron liberados por sus dueños. Es probable que las condiciones sean favorables para el establecimiento de una población dentro del poblado de San Miguel de Cozumel, lo que debe monitorearse en el futuro.
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Hofer, Marlis; Mölg, Thomas; Marzeion, Ben; Kaser, Georg
2010-05-01
Recently initiated observation networks in the Cordillera Blanca provide temporally high-resolution, yet short-term atmospheric data. The aim of this study is to extend the existing time series into the past. We present an empirical-statistical downscaling (ESD) model that links 6-hourly NCEP/NCAR reanalysis data to the local target variables, measured at the tropical glacier Artesonraju (Northern Cordillera Blanca). The approach is particular in the context of ESD for two reasons. First, the observational time series for model calibration are short (only about two years). Second, unlike most ESD studies in climate research, we focus on variables at a high temporal resolution (i.e., six-hourly values). Our target variables are two important drivers in the surface energy balance of tropical glaciers; air temperature and specific humidity. The selection of predictor fields from the reanalysis data is based on regression analyses and climatologic considerations. The ESD modelling procedure includes combined empirical orthogonal function and multiple regression analyses. Principal component screening is based on cross-validation using the Akaike Information Criterion as model selection criterion. Double cross-validation is applied for model evaluation. Potential autocorrelation in the time series is considered by defining the block length in the resampling procedure. Apart from the selection of predictor fields, the modelling procedure is automated and does not include subjective choices. We assess the ESD model sensitivity to the predictor choice by using both single- and mixed-field predictors of the variables air temperature (1000 hPa), specific humidity (1000 hPa), and zonal wind speed (500 hPa). The chosen downscaling domain ranges from 80 to 50 degrees west and from 0 to 20 degrees south. Statistical transfer functions are derived individually for different months and times of day (month/hour-models). The forecast skill of the month/hour-models largely depends on
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Yoon, Kyoung-Jin; Schwartz, Kent; Sun, Dong; Zhang, Jianqiang; Hildebrandt, Hugh
2012-03-01
Influenza A virus (FLUAV) causes acute respiratory disease in humans and a variety of animal species. The virus tends to remain within the species of origin; nonetheless, naturally occurring cross-species transmission of FLUAV has been periodically documented. Multiple cross-species transmissions of FLUAV have been reported from companion animals and captive wild animals, neither of which is historically considered as natural hosts of FLUAV. In the fall of 2010, mink (Mustela vison) inhabiting a 15,000-head mink farm in the Midwest United States experienced persistent severe respiratory distress and nose and/or mouth bleeding. Mink losses averaged approximately 10 animals per day. Six dead mink at 6 months of age were submitted to the Iowa State University Veterinary Diagnostic Laboratory for diagnostic investigation. Gross and microscopic examinations revealed that all 6 mink had hemorrhagic bronchointerstitial pneumonia. Hemolytic Escherichia coli was isolated from lungs, probably accounting for hemorrhagic pneumonia. All animals tested negative for Canine distemper virus and Aleutian mink disease virus. Interestingly, FLUAV of H1N2 subtype, which contained the matrix gene of swine lineage, was detected in the lungs. Serological follow-up on mink that remained in the ranch until pelting also confirmed that the ranch had been exposed to FLUAV of H1 subtype (δ clade). The case study suggests that FLUAV should be included in the differential diagnosis when mink experience epidemics of respiratory disease. Since the source of FLUAV appeared to be uncooked turkey meat, feeding animals fully cooked ration should be considered as a preventive measure.
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Watt, Janet Tilden; Johnson, Samuel Y.; Hartwell, Stephen R.; Roberts, Michelle
2015-01-01
Marine geology and geomorphology were mapped along the continental shelf and upper slope between Point Piedras Blancas and Pismo Beach, California. The map area is divided into the following three (smaller) map areas, listed from north to south: San Simeon, Morro Bay, and Point San Luis. Each smaller map area consists of a geologic map and the corresponding geophysical data that support the geologic mapping. Each geophysical data sheet includes shaded-relief multibeam bathymetry, seismic-reflection-survey tracklines, and residual magnetic anomalies, as well as a smaller version of the geologic map for reference. Offshore geologic units were delineated on the basis of integrated analysis of adjacent onshore geology, seafloor-sediment and rock samples, multibeam bathymetry and backscatter imagery, magnetic data, and high-resolution seismic-reflection profiles. Although the geologic maps are presented here at 1:35,000 scale, map interpretation was conducted at scales of between 1:6,000 and 1:12,000.
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El tópico del hambre como construcción metafórica del sentido en la poesía de blanca varela
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Mara Donat
2015-05-01
Full Text Available Into the poetic of descent proposed by the literary critic Cárcamo-Huechante, Blanca Varela developes a poetry in relation with corporality and deterioration. Existencialism thought connects with the search of a material poetic word, fill with corporal, byologic elements. Hunger is the privileged metaphor in the process of materialization of poetic writing. It is social and linguistic demand against unjustice and the impoverished language system, also into literary tradition. We propose an exegesis of metaphoric configuration of hunger through a thematic and a stylistic line of research, which embodies sense and sound of poetic word.
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Carol Raish; Alice M. McSweeney
2003-01-01
The ranches of northern New Mexico, composed of land and livestock, are integral components of family and community life. This pilot study examines current economic, social, and cultural aspects of livestock operations owned by ranchers with Federal grazing permits (permittees) on the Canjilon and Española Ranger Districts of the Santa Fe and Carson National...
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Juan José Alvarado
2012-04-01
Full Text Available Los arrecifes coralinos son uno de los ecosistemas más diversos en el planeta, tanto por los organismos constructores como por aquellos que viven encima, sobre, dentro y debajo de ellos. Los corales del genero Pocillopora son reconocidos mundialmente por albergar una importante fauna de invertebrados entre sus ramas, los cuales son considerados como simbiontes obligatorios en una gran cantidad de casos. La presente investigación describe la fauna de invertebrados asociados al coral Pocillopora damicornis en Bahía Culebra, Costa Rica, describiendo sus densidades, frecuencias, riquezas y diversidades a través del tiempo. Para esto se colectaron 5 colonias cada 3-4 meses en Playa Blanca, Bahía Culebra. En total se encontraron 448 individuos en 35 especies, siendo Harpiliopsis depressa, Lithophaga aristata, Trapezia ferruginea, Alpheus lottini, Fennera chacei, y Petrolisthes haigae las especies predominantes. Noviembre fue el mes en el que se encontraron los mayores valores en los índices de riqueza, diversidad y diferenciación taxonómica, mientras que agosto fue el que presento los valores más bajos de todos. En términos generales, la época lluviosa mostro mayor riqueza de especies que la época seca. Así mismo, las especies colectados y los valores obtenidos son muy similares a otras zonas del Pacifico Oriental Tropical. Culebra ha venido sufriendo una perdida en la cobertura coralina, que podría tener consecuencias en la diversidad y abundancia de organismos asociados a corales. Estas consecuencias incluyen perdida en la fecundidad de estos organismos, una reducción en su función como limpiadores y protectores de depredadores del coral, poniendo en riesgo su diversidad, lo que puede afectar los stocks de peces depredadores que depende de ellos. Realizar monitoreos permanentes de la criptofauna asociada al coral Pocillopora va a ser determinante para cuantificar perdidas o recuperaciones en la composición de invertebrados asociados
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Deposit of molybdenum associated with uranium in Pena Blanca, Mexico
International Nuclear Information System (INIS)
Reyes-Cortes, M.
1985-01-01
The uranium-molybdenum deposits are in the Sierra Pena Blanca, 45 km north of the city of Chihuahua. The largest amounts of uranium-molybdenum ore are found in the area of Las Margaritas-Puerto III. The ratio of molybdenum mineralization to uranium is 2:1 in this area and the deposits are distributed at depths of 55-100 m in ignimbritic rocks of the so called Escuadra Formation. This volcanic unit consists of an altered crystalline-lithic ash-flow tuff of Oligocene age. The molybdenum mineral occurs as powellite (CaMoO 4 ) and is found predominantly in two size ranges: phenocrysts 0.1-20 mm in diameter are abundant in the upper part of the deposit, while a material which varies between cryptocrystalline and amorphous predominates in the lower part. This latter material can easily be identified inside the mine by its strong orange fluorescence; it is also easy to recover by leaching. In contrast, the metallurgical process of recovery by leaching of the phenocrystalline portion of the powellite has so far presented problems. Powellite is generally found in association with carnotite, margaritasite and uranophane, and its mineralization consists of disseminated lumps, druses, crustifications and veins; frequently, it partially replaces the phenocrysts of argillized feldspars of the Escuadra Formation. Fractured and brecciated zones with intense oxidation of jarosite, haematite, limonite and goethite sometimes show high U-Mo concentrations; on other occasions the concentration is found with alunite at the contact between the ignimbrite and the layers of argillized vitrophyre. The mineralizations of fluorite, pyrite, jarosite, alunite and opal are indicative of hydrothermal deposition, possibly at low temperature with supergene or geothermal alterations. (author)
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Oscar García; Iria Acevedo; Jorge Ruiz Ramírez
2013-01-01
La cachama blanca (Piaractus brachypomus) es una especie económicamente importante en la acuicultura continental de América Latina y una alternativa nacional de producción de pescado para la piscicultura, la industria y el consumo. El objetivo del presente trabajo de investigación fue caracterizar mediante análisis proximal, evaluación microbiológica y sensorial, carnes para hamburguesas elaboradas con pulpa de cachama y diferentes inclusiones porcentuales de harina de soya texturizada (HST) ...
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Bulkley, G. B.; Mattenberger, S.
2009-12-01
Black Drake Ranch comprises ~1000 acres of Klamath Basin high desert in S. Central OR, containing 2.5m reaches each of the North Fork Sprague River (NFSR) and its major tributary, Five Mile Creek, a meandering meadow spring creek anchoring 26m of upstream habitat for several species of concern, including native redband trout. Decades of unenlightened management had resulted in substantial watershed degradation: channelization and diking by the U.S. Army Corps of Engineers (hubris), massive stream bank head cuts and erosion by cattle hooves, complete blockade of fish passage by two irrigation diversion dams, loss of eggs and fry in irrigation runoff, upland juniper overgrowth from fire suppression, and extensive infestation of noxious weeds. After in depth analysis by the Working Landscapes Alliance, Klamath Watershed Partnership, Oregon Dept. of Fish and Wildlife, and adjacent landowners, the landowner, a retired cellular biologist, collaborated with an United States Fish & Wildlife Service hydrologist to formulate a comprehensive Long Term Strategic Plan (LTSP) to restore a functioning ecosystem compatible with an economically viable cattle/hay ranching operation. The LTSP is based upon current best practices (CPBs) recommended by experts in relevant, but relatively young scientific fields, with the recognition that these CPBs are constantly evolving as new information becomes available, particularly relevant to this particular site. Consequently, the LTSP remains flexible, and is repeatedly revised as new information is culled from the literature, but mostly from on-site experience and errors. This LTSP entails: 1. Rotational cattle grazing and riparian fencing to allow the re-establishment of bank-stabilizing native plant populations; 2. At diversion dams, installation of fish screens and 3. re-establishment of fish passage using paleochannels revealed by aerial contour mapping; 4. Selective stream bank head cut repair to retain and thereby reduce irrigation
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1984-02-24
the cranial nerves, peripheral nerves or central nervous system function of the Ranch Handers. As expected, there was a profound influence of diabetes ...Vagina fused, had operation 1 753 1 Defective kidney 1 Malformation of right kidney 1 Infantile polycystic kidney disease 754 Talipes 2 Club foot 2...e.g., matched originals only and the entire comparison group). Further, for specific analyses, participants with diabetes and pedal edema have been
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Mónica Susana Hoffmeyer
2005-09-01
Full Text Available The impact of a power plant cooling system in the Bahía Blanca estuary (Argentina on the survival of target zooplanktonic organisms (copepods and crustacean larvae and on overall mesozooplankton abundance was evaluated over time. Mortality rates were calculated for juveniles and adults of four key species in the estuary: Acartia tonsa Dana, 1849 and Eurytemora americana Williams, 1906 (native and invading copepods, and larvae of the crab Chasmagnathus granulata Dana, 1851 and the invading cirriped Balanus glandula Darwin, 1854. Mean total mortality values were up to four times higher at the water discharge site than at intake, though for all four species, significant differences were only registered in post-capture mortality. The findings show no evidence of greater larval sensitivity. As expected, the sharpest decrease in overall mesozooplankton abundance was found in areas close to heated water discharge.El impacto del sistema de enfriamiento de una planta termoeléctrica ubicada en el estuario de Bahía Blanca, Argentina, fue evaluado en el tiempo, sobre la supervivencia de especies zooplanctónicas seleccionadas (copépodos y larvas de crustáceos y la abundancia general del meso-zooplancton. Se calcularon tasas de mortalidad de juveniles y adultos de cuatro especies clave en el estuario: Acartia tonsa Dana,1849 y Eurytemora americana Williams,1906 (copépodos nativo e invasor, y larvas del cangrejo Chasmagnathus granulata Dana, 1851 y del cirripedio invasor Balanus glandula Darwin, 1854. Los valores medios hallados de la tasa de mortalidad total, fueron hasta cuatro veces más altos en la descarga que en el agua de entrada al sistema. Sin embargo sólo se registraron diferencias significativas entre estos dos sitios, en los valores de mortalidad post-captura obtenidos para las cuatro especies. Los resultados del estudio no demostraron una mayor sensibilidad larval. Como se esperaba, la disminución más pronunciada en la abundancia general
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Proglacial hydrology in the tropical Andes: lessons from the Cordillera Blanca, Peru (Invited)
McKenzie, J. M.; Mark, B. G.; Baraer, M.
2009-12-01
Understanding the complexities of tropical Andean hydrology is critical for managing modern water resources and interpreting paleohydrologic records. Glaciers are the most visible component of these systems, responding to global climate change and acting as critical hydrologic reservoirs. Tropical Andean glaciers are undergoing rapid retreat with complex impacts on the downstream hydrology. Groundwater is also an important component of the Andean regional hydrologic system, but its contribution is difficult to assess due to remote site access, minimal baseline data, and lack of continuous historical discharge and precipitation measurements. We have synthesized hydrochemical data from synoptically sampled glacial melt water, groundwater, precipitation, and stream discharge collected intermittently between 1998 and July 2008 throughout the Callejon de Huaylas, a 5000 km2 watershed that drains the western side of the Cordillera Blanca in northern Perú. Our data from 2004 to 2006 show systematic annual shifts in the isotopic ratios (δ18O and δ2H) of river water, indicating an increase in glacial melt water input, and we are able to use these changes across the Cordillera Blanca to estimate an average increase of 1.6 (± 1.1) % in the specific discharge of the glacierized basins. Enhanced total stream discharge in more glacierized catchments (>20% glacier area) is demonstrated by a significant positive trend in a 43-year discharge anomaly record. Our hydrochemical basin characterization method (HBCM) uses chemical mass balance mixing to quantify the contribution of glacial melt water, groundwater, and surface runoff to streams for different valleys and nested watersheds in the Callejon de Huaylas. The Yanamarey basin (7% glaciated) has been observed since 1998 and the HBCM results show good agreement with measured stream discharge (maximum R2 of 0.99) for monthly cumulative values. These results suggest that for most of the studied years groundwater is the main
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Directory of Open Access Journals (Sweden)
Ana Luján M. De Fabricius
2005-12-01
Full Text Available El presente trabajo se realizó en el arroyo El Chacay y en el río Las Albahacas desde la primavera de 1999 hasta la primavera de 2000. El objetivo de esta investigación fue comparar la composición y abundancia de la comunidad diatómica en ríos y arroyos serranos de la cuenca del río Piedra Blanca, durante un ciclo anual. En total, 121 taxa (especies, variedades y formas fueron registrados a partir del análisis taxonómico. El orden Pennales predominó en número de especies y porcentaje de frecuencia relativa. El género con mayor número de especies fue Navicula. El número de especies osciló entre un mínimo de 21 en invierno de 2000 en el río Las Albahacas (aguas arriba del balneario y un máximo de 49 en verano de 2000 en el arroyo El Chacay y en primavera de 2000 en el río Las Albahacas (aguas arriba del balneario, respectivamente. El mayor número de especies corresponde a los menores porcentajes de frecuencia. La densidad osciló entre 1 org.ml-1 en otoño de 2000 en el río Las Albahacas, aguas arriba del balneario y 1596,40 org.ml-1 registrados en primavera de 1999 en el arroyo El Chacay. Los parámetros fisicoquímicos y la composición de especies determinaron una mayor afinidad entre los sitios en la estación de primavera.The present work was developed in El Chacay Creek and Las Albahacas River from 1999 spring to 2000 spring. The aim of this investigation was to compare the composition and abundance of the diatom communities of a highland water stream and a river within the Piedra Blanca River basin, during an annual cycle. As a result of a taxonomic analysis a total of 121 taxa (species, varieties and forms were recorded. The Order Pennales predominated in number of species and relative frequency. The genus with the highest number of species was Navicula. The total number of species varied from a minimum of 21 in 2000 winter season in the Las Albahacas River (upstream riverside resort to a maximun of 49 in 2000 summer
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José Molina Ruiz
2012-01-01
Full Text Available La introducción del concepto de sostenibilidad en el mercado energético implica la potenciación de las energías renovables activando políticas que fomenten su implantación. El éxito de estas políticas se plasmará en el incremento de participación de las energías renovables en el mix energético, en la reducción de emisiones de CO2 y en el cumplimiento de los compromisos internacionales. Este trabajo analiza el grado de implantación de las energías renovables en un municipio de la Región de Murcia (Blanca, valorando la incidencia de la legislación sectorial energética y estimando la huella de carbono derivada del consumo de energía eléctrica.
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José A. Posada G.
2000-03-01
Full Text Available Entre abril y diciembre de 1996, se llevó a cabo un estudio limnológico de 17 quebradas ubicada en el área del Parque Piedras Blancas (6° 8' 20''N, 75° 30' 20''Wlocalizado al SE de Medellín a 2 400 m de altura. El estudio se realizó en 35 estaciones de muestreo y se establecieron tres períodos de muestreo: el primero entre abril y mayo, el segundo de agosto a septiembre y el tercero de octubre a diciembre de 1996. La finalidad del mismo era establecer la calidad ecológica de las aguas ubicadas en el área del Parque. Para la recolección cualitativa de los macroinvertebrados se utilizaron las redes D-net y de pantalla. El área de muestreo en cada estación fue de 6 m2. Las variables fisicoquímicas mostraron fluctuaciones bajas a lo largo del estudio, excepto la conductividad y los sólidos totales, cuyos cambios estuvieron relacionados con la alta pluviosidad durante el período de estudio. La comunidad de macroinvertebrados encontrada, estuvo conformada por 113 géneros, pertenecientes a 63 familias y siete Phyla, siendo el orden Tichoptera el más abundante. El área de muestreo en cada estación fue de 6 m². El resultado del estudio muestra como la cuenca de la quebrada Piedras Blancas presenta condiciones que pueden clasificarse en términos generales como oligo-mesotróficas.From April to December 1996 a limnological study was carried out in 17 streams near Medellín, in order to stablish their water quality. The area is located in Piedras Blancas Park (6° 8' 20''N, 75° 30' 20''W SE of Medellín at 2 400 m altitude. Three sampling periods, encompasing wet and dry seasons were selected: April-May, August-September and October-December. For qualitative collection methods hand screen D-net were used. Each station was intensively sampled to collect most macroinvertebrates in all types of habitat. The area sampled in each station was 6 m². Physicochemical variables in general showed small fluctuations along the study; only
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Agua Caliente Wind/Solar Project at Whitewater Ranch
Energy Technology Data Exchange (ETDEWEB)
Hooks, Todd [Agua Caliente Band of Cahuilla Indians, Palm Springs, CA (United States); Stewart, Royce [Red Mountain Energy Partners, Sante Fe, NM (United States)
2014-12-16
Agua Caliente Band of Cahuilla Indians (ACBCI) was awarded a grant by the Department of Energy (DOE) to study the feasibility of a wind and/or solar renewable energy project at the Whitewater Ranch (WWR) property of ACBCI. Red Mountain Energy Partners (RMEP) was engaged to conduct the study. The ACBCI tribal lands in the Coachella Valley have very rich renewable energy resources. The tribe has undertaken several studies to more fully understand the options available to them if they were to move forward with one or more renewable energy projects. With respect to the resources, the WWR property clearly has excellent wind and solar resources. The DOE National Renewable Energy Laboratory (NREL) has continued to upgrade and refine their library of resource maps. The newer, more precise maps quantify the resources as among the best in the world. The wind and solar technology available for deployment is also being improved. Both are reducing their costs to the point of being at or below the costs of fossil fuels. Technologies for energy storage and microgrids are also improving quickly and present additional ways to increase the wind and/or solar energy retained for later use with the network management flexibility to provide power to the appropriate locations when needed. As a result, renewable resources continue to gain more market share. The transitioning to renewables as the major resources for power will take some time as the conversion is complex and can have negative impacts if not managed well. While the economics for wind and solar systems continue to improve, the robustness of the WWR site was validated by the repeated queries of developers to place wind and/or solar there. The robust resources and improving technologies portends toward WWR land as a renewable energy site. The business case, however, is not so clear, especially when the potential investment portfolio for ACBCI has several very beneficial and profitable alternatives.
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CASOS SELECTOS DE RESISTENCIA A INSECTICIDAS EN MOSCAS BLANCAS (Hemiptera: Aleyrodidae EN EL MUNDO
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Macías-flores A
2013-01-01
Full Text Available Las moscas blancas (Hemíptera: Aleyrodidae son un problema a escala global. En México, llamó la atención como plaga agrícola en la década de los años 80´s y 90´s del siglo pasado por las pérdidas económicas que ocasionaron en los cultivos agrícolas, debido a los daños directos por la succión de savia y a los daños indirectos por la transmisión de enfermedades de origen viral. El hombre en su intento fallido por erradicarlas ha hecho uso desmedido de insecticidas químicos, quizás por su accesibilidad por costo bajo o por efectos de control inmediatos, por lo cual ha causado daño al medio ambiente y a la salud humana, con la consecuencia de desarrollo de resistencia. En un intento por disminuir los efectos de tales sustancias, muchas investigaciones alrededor del mundo se han conducido para encontrar productos insecticidas más efectivos con el menor impacto ambiental y a la salud humana, y que contribuyan a incrementar las herramientas de control disponibles en los sistemas de producción agrícola.
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Uranium deposits associated to tertiary acid volcanism of the Pena Blanca Sierra (Chihuahua, Mexico)
International Nuclear Information System (INIS)
Aniel, B.
1986-12-01
The uraniferous deposits located in the Sierra de Pena Blanca (Chihuahua, Mexico) are the consequence of successive events that modified acid volcanic rocks. The devitrification of the Nopal Formation, vitroclastic tuffs, is esential in the cooling history because it releases uranium that becomes available. The uranium present in fluids as uranylcarbonate complexes, precipitate along the lamellea of hematite (exsolutions of the ilmenites). The presence of sulfur causes the destabilization of the ilmenites with uranium oxide (pitchblende - titanium oxide - pyrite), the pseudomorph of magnetites (pitchblende - pyrite) and the transformation of hematite into pyrite. The silice coming from the kaolinization of feldspars recristallizes as microcristalline quartz so that the rock appears compact. Fractures cause the uplifting of the lower unit of Nopal formation. It has been altered to montmorillonite. A carbonatation of this tuff has been observed and these two types of alteration occur after kaolinization. The Escuadra formation overlies the Nopal formation. The deposition takes place on an eroded basement where a soil developed. The two formations will together undergo transformations due to the saturation level and the primary ore will be only oxidized or oxidized, transported and reconcentrated. Late and localized thermal activities have been observed and may be the result of tectonic movements occurring after the supergene modification [fr
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COSTAMAGNA, SIXTO RAÚL; VISCIARELLI, ELENA; LUCCHI, LEANDRO D; BASUALDO, JUAN A
2005-01-01
El objetivo del presente trabajo fue detectar la presencia de parásitos de importancia sanitaria para el hombre, en el arroyo Napostá, en aguas recreacionales (piscinas públicas) y de consumo en Bahía Blanca (Provincia de Buenos Aires) Argentina. Se recolectaron 24.000 litros de agua de diferentes sectores del arroyo Napostá, 2.000 litros de cada una de las tres piscinas públicas y 8.000 litros de agua de consumo, mediante filtros de poro de una micra de diámetro (Cuno Micro Wind). El procesa...
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Cabezas, Gonzalo Ezequiel
2014-12-01
Full Text Available Resumen Este artículo es un estudio de caso en clave microanalítica, que analiza las prácticas de afiliación, cotización, baja y renuncia en el centro socialista de Bahía Blanca en 1911-1919, contrastando cómo debía ser el procedimiento formal según las normas y/o costumbres establecidas en el partido y cómo era el habitual, junto con las razones de los afiliados para justificar que la práctica se alejara de la norma. Proponemos entender las prácticas dentro del continuum que va de lo formal a lo informal (de las reglas a los procedimientos cotidianos, en un intento por trascender la dicotomía entre accionar “tradicional y moderno” (signo del atraso y del progreso respectivamente, común en los estudios sobre partidos políticos en general y sobre socialismo en particular. Abstract This article is a case study in microanalytical key, which analyzes the practices of affiliation, contribution, unenlisting and resignation in the socialist center of Bahía Blanca in 1911- 1919, contrasting how should be the formal procedure according to the rules and/or costumes established in the party and how was the usual one, along with the reasons of the affiliates to justify that the practice moved away from the norm. We propose to understand the practices within the continuum that goes from formal to informal (from the rules to the usual procedures, in an attempt to transcend the dichotomy between “traditional and modern” action (sign of backwardness and progress respectively, common in studies of political parties in general and of socialism in particular.
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Laura Ferrer
2000-12-01
Full Text Available The Bahía Blanca Estuary includes a large tidal plain with an area close to 1150 km2. Mud is predominant in its sediments, where a significant population of the crab Chasmagnathus granulata lives during the whole year. Moreover, there are important urban and industrial discharges into this environment. Cd and Pb concentrations were determined in samples of water (for both dissolved and suspended particulate matter and surface sediments (total and 63 µm fractions. Organic matter was analysed in the sediments, while temperature, salinity, pH and dissolved oxygen were measured in the estuarine water. The metal concentrations determined in this study were: 1.47 ± 1.08 µg Cd g–1 and 14.68 ± 4.31 µg Pb g–1 in surface sediments; 2.21 ± 1.33 µg Cd g–1 and 25.70 ± 7.09 µg Pb g–1 in the –1 and below the analytical detection limit of Pb in suspended particulate matter. Furthermore, dissolved Cd and Pb were lower than the norms for marine and estuarine waters (2 µg dm–3 for Cd and 5 µg dm–3 for Pb, E.P.A.. Simultaneously, the effects of Cd and Pb were studied on recently hatched larvae of Ch. granulata, through 96-hour semi-static acute assays. Viability was the criterion assessed in the assays. LC50 (96 h for Cd was 46.43 µg dm–3 (36.92 - 56.34 µg dm–3, whilst that for Pb was 1.00 mg m–3 (0.79 - 1.23 mg dm–3, which demonstrates that Cd is more toxic towards larvae. Finally, both LC50 values determined for Cd and Pb were higher than the corresponding metal concentrations measured in the Bahía Blanca environment.
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Prototipo de monitoreo y alarma para la detección de heladas blancas en sectores rurales de Sogamoso
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Willmar Arbey Suarez- Rodrígez
2018-01-01
Full Text Available El presente artículo muestra el diseño de un prototipo de monitoreo y alarma que permite la detección de heladas blancas y sirve de base para el desarrollo de un prototipo que posibilite la detección y predicción de heladas negras. El dispositivo, muestra las variables atmosféricas de temperatura y humedad, las comunica a un servidor local (Broker mediante WiFi y el protocolo MQTT, éste a su vez retransmite la información útil a otros dispositivos finales, como celulares y computadoras. El sistema es capaz de alertar mediante una alarma y permitir la comunicación de estos eventos a los diferentes dispositivos finales. Para lograr ésto, fue necesario seleccionar los dispositivos, tecnologías y protocolos convenientes, realizar un diseño y validarlo por medio de la emulación de las condiciones de temperatura y humedad adecuadas.
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Le Luherne, Moran
2015-01-01
El documental Santísima muerte : Niña blanca, niña bonita. El culto popular a la Santa Muerte de Pável Valenzuela Arámburo forma parte de un proyecto de investigación titulado « Mística popular transfronteriza. Tradiciones y santos populares en la frontera México-Estados Unidos », coordinado por el Doctor José Manuel Valenzuela Arce y publicado en el Colegio de la Frontera Norte. Se enfoca en el culto de la Santa Muerte, culto religioso que emergió desde principios del siglo veinte en México,...
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Stratigraphy of the PB-1 well, Nopal I uranium deposit, Sierra Pena Blanca, Chihuahua, Mexico
Energy Technology Data Exchange (ETDEWEB)
Dobson, P.; Fayek, M.; Goodell, P.; Ghezzehei, T.; Melchor, F.; Murrell, M.; Oliver, R.; Reyes-Cortes, I.A.; de la Garza, R.; Simmons, A.
2008-08-01
The Nopal I site in the Pena Blanca uranium district has a number of geologic and hydrologic similarities to the proposed high-level radioactive waste repository at Yucca Mountain, making it a useful analogue to evaluate process models for radionuclide transport. The PB-1 well was drilled in 2003 at the Nopal I uranium deposit as part of a DOE-sponsored natural analogue study to constrain processes affecting radionuclide transport. The well penetrates through the Tertiary volcanic section down to Cretaceous limestone and intersects the regional aquifer system. The well, drilled along the margin of the Nopal I ore body, was continuously cored to a depth of 250 m, thus providing an opportunity to document the local stratigraphy. Detailed observations of these units were afforded through petrographic description and rock-property measurements of the core, together with geophysical logs of the well. The uppermost unit encountered in the PB-1 well is the Nopal Formation, a densely welded, crystal-rich, rhyolitic ash-flow tuff. This cored section is highly altered and devitrified, with kaolinite, quartz, chlorite, and montmorillonite replacing feldspars and much of the groundmass. Breccia zones within the tuff contain fracture fillings of hematite, limonite, goethite, jarosite, and opal. A zone of intense clay alteration encountered in the depth interval 17.45-22.30 m was interpreted to represent the basal vitrophyre of this unit. Underlying the Nopal Formation is the Coloradas Formation, which consists of a welded lithic-rich rhyolitic ash-flow tuff. The cored section of this unit has undergone devitrification and oxidation, and has a similar alteration mineralogy to that observed in the Nopal tuff. A sharp contact between the Coloradas tuff and the underlying Pozos Formation was observed at a depth of 136.38 m. The Pozos Formation consists of poorly sorted conglomerate containing clasts of subangular to subrounded fragments of volcanic rocks, limestone, and chert
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Stratigraphy of the PB-1 well, Nopal I uranium deposit, Sierra Pena Blanca, Chihuahua, Mexico
International Nuclear Information System (INIS)
Dobson, P.; Fayek, M.; Goodell, P.; Ghezzehei, T.; Melchor, F.; Murrell, M.; Oliver, R.; Reyes-Cortes, I.A.; de la Garza, R.; Simmons, A.
2008-01-01
The Nopal I site in the Pena Blanca uranium district has a number of geologic and hydrologic similarities to the proposed high-level radioactive waste repository at Yucca Mountain, making it a useful analogue to evaluate process models for radionuclide transport. The PB-1 well was drilled in 2003 at the Nopal I uranium deposit as part of a DOE-sponsored natural analogue study to constrain processes affecting radionuclide transport. The well penetrates through the Tertiary volcanic section down to Cretaceous limestone and intersects the regional aquifer system. The well, drilled along the margin of the Nopal I ore body, was continuously cored to a depth of 250 m, thus providing an opportunity to document the local stratigraphy. Detailed observations of these units were afforded through petrographic description and rock-property measurements of the core, together with geophysical logs of the well. The uppermost unit encountered in the PB-1 well is the Nopal Formation, a densely welded, crystal-rich, rhyolitic ash-flow tuff. This cored section is highly altered and devitrified, with kaolinite, quartz, chlorite, and montmorillonite replacing feldspars and much of the groundmass. Breccia zones within the tuff contain fracture fillings of hematite, limonite, goethite, jarosite, and opal. A zone of intense clay alteration encountered in the depth interval 17.45-22.30 m was interpreted to represent the basal vitrophyre of this unit. Underlying the Nopal Formation is the Coloradas Formation, which consists of a welded lithic-rich rhyolitic ash-flow tuff. The cored section of this unit has undergone devitrification and oxidation, and has a similar alteration mineralogy to that observed in the Nopal tuff. A sharp contact between the Coloradas tuff and the underlying Pozos Formation was observed at a depth of 136.38 m. The Pozos Formation consists of poorly sorted conglomerate containing clasts of subangular to subrounded fragments of volcanic rocks, limestone, and chert
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Directory of Open Access Journals (Sweden)
Anya AHMED
2011-11-01
Full Text Available Intra-European migration is now a well-documented phenomenon among older people and for UK retirees, Spain is the most popular choice. ‘Belonging’ is particularly important when attempting to understand experiences of migration since often people become aware that they need to belong precisely when they realise that they do not. However, although belonging is a recurrent theme in identity and migration discourse it is rarely defined. This paper explores the concept of belonging in relation to the experiences of a group of retired women living in the Costa Blanca in Spain and considers its multiple and overlapping representations. The myriad forms of belonging that these ‘lifestyle migrants’ construct through narrative in relation to place, networks and ethnic identity and the central intersecting role of language are considered and discussed.
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Ichthyoplankton spatial pattern in the inner shelf off Bahía Blanca Estuary, SW Atlantic Ocean
Hoffmeyer, Mónica Susana; Clara, Menéndez María; Florencia, Biancalana; Mabel, Nizovoy Alicia; Ramón, Torres Eduardo
2009-09-01
This study focuses on the composition, abundance and distribution of ichthyoplankton in the inner shelf area off Bahía Blanca Estuary on the SW Atlantic Ocean during late spring. Eggs and larvae of Brevoortia aurea, Engraulis anchoita, Parona signata, Sciaenidae spp. - such as Cynoscion guatucupa and Micropogonias furnieri -, and Odontesthes argentinensis were found. Species richness was low probably as a result of season and shallow depths. Ichthyoplankton abundance reached values close to 10 000 per 10 m -3 (eggs) and 4000 per 10 m -3 (larvae) and displayed a spatial distribution pattern with maximum abundance values restricted to a band parallel to the coast. Differences between egg and larval patterns, probably derived from a different displacement and hydrodynamic behavior, were observed. Egg and larvae distribution patterns were found related with spawning areas and to directly depend on salinity and mesozooplankton. The larvae distribution pattern, in particular, was found to inversely depend on particulate organic carbon. In addition, the geographic location of egg and larvae maxima strongly coincided with a saline front reported for this area in springtime, thus suggesting a direct relationship with it.
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Organotin compounds in Brachidontes rodriguezii mussels from the Bahía Blanca Estuary, Argentina.
Quintas, Pamela Y; Arias, Andrés H; Oliva, Ana L; Domini, Claudia E; Alvarez, Mónica B; Garrido, Mariano; Marcovecchio, Jorge E
2017-11-01
Levels of tributyltin and its breakdown compounds, including the first record of monobutyltin (MBT) in history for Latin America, were determined in native mussels (Brachidontes rodriguezii) by means of CG-MS, after extraction/derivatization assisted by ultrasound. The samples were collected in 2013 in Bahía Blanca Estuary (Argentina) at 6 sites, which reflect different levels of maritime activities. Total butyltins (TBts = TBT+ DBT+ MBT) levels ranged from 19.64 to 180.57ng Sn g -1 dry weight. According to the Oslo-Paris commission, the results indicated that 73.9% of mussels could be under biological effects risks associated with TBT pollution. In accordance with the calculated bioaccumulation factors, approximately 56% of samples appeared to have accumulated TBT through the sediments. All sampling sites were shown to be impacted by organotin compounds (OTCs) showing variable levels through seasons, which could be related with the variation of the water temperature. Degradation index analyses suggested aged inputs of TBT possibly under a general degradation process at the area of study. In addition, the occurrence of DBT and MBT could not be uniquely attributed to the degradation pathway of the TBT; in fact, results outlined the possible contribution of some punctual and diffuse sources at the area such as proximity to plastic industries, industrial effluents, sewage outlets and domestic wastewaters. Copyright © 2017 Elsevier Inc. All rights reserved.
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Munyeme Musso
2010-06-01
Full Text Available Abstract Background In Zambia, translocation of wildlife from National Parks to private owned game ranches demands that only animals free of infectious diseases that could adversely affect the expansion of the wildlife industry should be translocated to game ranches. Sarcoptes mange (Sarcoptes scarbiei has been involved in the reduction of wildlife populations in some species. Results Sarcoptes mange (Sarcoptes scarbiei was detected and eradicated from two herds of African buffalo (Syncerus caffer calves captured in the Kafue GMA in July 2004 and August 2005. The overall prevalence was estimated at 89.5% (77/86. Sex had no influence on the occurrence and severity of the disease. Of the 86 calves used in the study, 72.1% had good body condition scores, 20.9% were fair and 7.0% were poor. Of the 77 infected calves, 53.2% were mildly infected, 28.6% were moderately and 18.2% were severely infected. Body condition score was correlated to the severity of the infection (r = 0.72, p n = 86 at capture. Eradication of Sarcoptes mites from the entire herd using ivermetcin was dependant on the severity of the infection. The overall ability of ivermectin to clear the infection after the first treatment was estimated at 81.8% (n = 77. It increased to 94.8% and 100% after the second and third treatments respectively. Conclusion This is the first report on the epidemiology and treatment of Sarcoptes mange in African buffaloes in Zambia. This study improves our understanding about Sarcoptes scabiei epidemiology and treatment which will have further applications for the safe animal translocation.
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Wockner, Gary; Boone, Randall; Schoenecker, Kathryn A.; Zeigenfuss, Linda C.
2015-01-01
Great Sand Dunes National Park and Preserve and the neighboring Baca National Wildlife Refuge constitute an extraordinary setting that offers a variety of opportunities for outdoor recreation and natural resource preservation in the San Luis Valley of Colorado. Adjacent to these federal lands, the Nature Conservancy (TNC) manages the historic Medano Ranch. The total land area of these three conservation properties is roughly 121,500 hectares (ha). It is a remote and rugged area in which resource managers must balance the protection of natural resources with recreation and neighboring land uses. The management of wild ungulates in this setting presents challenges, as wild ungulates move freely across public and private landscapes.
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Barrachina Albert, Ester
2011-01-01
La industria cerámica española mantiene una fuerte dependencia en cuanto a la importación de arcillas de cocción blanca, por carecer de las suficientes reservas mineras de este tipo de minerales. El objetivo de esta tesis se divide en dos partes. Por un lado, se intenta valorizar las arcillas españolas mediante diversas técnicas (hidrociclonado, separación magnética y calcinación) con el fin de eliminar las impurezas de compuestos de hierro y de materia orgánica que presentan, para que pue...
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La casa y la mesa de la reina Blanca de Navarra (1433
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Serrano Larrayoz, Fernando
2000-06-01
Full Text Available This study tries to amplify a subject not developed enough, for the moment, in the lines of historical research that are being carried out in Navarre. It is divided in two sections. On one hand, aspects as servants, provision, products and prices, among others, have been studied through the organisation in queen Blanca's Hostel. On the other hand, we have approached the symbolic factor that feeding implies. We have also studied questions relating to crockery, feeding paces, religious aspects and beneficiaries from food. At last, in spite of having few and dispersed data, we have tried to give a view about culinary practises in the navarresse court during the first half of the 15th century.[fr] L'étude envisage l'approfondisement d'un sujet jusqu'au présent peu développé, dans les lignes de recherche historique prioritaires en Navarre. Le travail est divisé en deux sections. D'une part, l'organisation de l'Hôtel de la reine Blanche, dont on a analise les serviteurs, les fourniseurs, les produits et les prix, parmis d'autres aspects de l'institution. De l'autre, on s'est approché à l'élément symbolique que la nourriture implique, en touchant des matières comme les vaisselles, les rythmes alimentaires, les aspects religieux et les bénéficiaires des aliments. Enfin, malgré les rares sources disponibles, on a cherché à donner aussi une vision générale des pratiques culinaires de la Cour navarraise au XVᵉ siècle.
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Detection of Babesia spp. in free-ranging Pukus, Kobus vardonii, on a game ranch in Zambia.
Munang'andu, Hetron Mweemba; Munyeme, Musso; Nambota, Andrew Mubila; Nalubamba, King Shimumbo; Siamudaala, Victor M
2011-12-01
Babesia spp. were detected from 4 asymptomatic pukus captured on a game ranch in central Zambia in October 2008. Blood smears were examined in 4 species of aymptomatic free-ranging antelopes, namely the puku (Kobus vordanii), reedbuck (Redunca arundinum), bushbuck (Tragelaphus sylvaticus), and kudu (Tragelaphus strepsiceros), and showed the presence of Babesia parasites only in the puku. In the puku, the prevalence of babesiosis was estimated at 33.3% (n = 12), while the overall prevalence in all examined animals was 8.5% (n = 47). The parasites showed morphological characteristics of paired ring-like stages with the length varying between 1.61 µm and 3.02 µm (mean = 2.12 µm, n = 27; SD = 0.76 µm). Both the infected and non-infected pukus showed good body condition scores (BCS), while the dominant tick species detected from all animals were Rhipicephalus appendiculatus, Rhipicephalus spp., and Boophilus spp. To our knowledge this is the first report of Babesia spp. infection in pukus in Zambia. These findings suggest that wildlife could play an important role in the epidemiology of babesiosis in Zambia.
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Caballero Mejía, Bibiana; Jaramillo Jaramillo, Daniel Francisco
2011-01-01
En dos vertientes de la cuenca de la quebrada Piedras Blancas (Medellín, Colombia) se estudió la relación humedad – persistencia de la repelencia al agua en la parte superficial de andisoles bajo dos coberturas vegetales: Cupressus lusitanica (ciprés) y Quercus humboldtii (roble), en tres posiciones a lo largo de la vertiente de colinas bajas: superior, media e inferior y en dos condiciones de humedad: con la humedad de campo y con la humedad adquirida al equilibrar al aire durante dos días m...
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Guittard, A.; Baraer, M.; McKenzie, J. M.; Mark, B. G.; Fernandez, A.; Walsh, E.; Santos Perez, A.
2015-12-01
The Rio Santa, Peru, drains the western slopes of the glacierized Cordillera Blanca and provides water resources at almost all levels of the watershed. As it flows away from the valleys of the Cordillera Blanca, the Rio Santa takes out pollution from numerous sources, including acid mine drainage and natural sulfide oxidation by-products. The Rio Santa dry season discharge decline that is projected to be a consequence of glaciers retreat will probably have implications for the evolution of water pollution. This threat makes the characterization of the actual contamination mechanisms of primary importance. The present study focuses, first, on the spatiotemporal variability of heavy metal contamination across the entire Rio Santa Watershed and secondly on differentiating anthropogenic and natural contaminated sites. First, a macroscale sampling has been done during the summer 2013 to provide an overview of the contamination by trace metal, in water, suspended sediments and riverbed sediments. In addition, 30 water samples were taken from a point next to the city of Huaraz at a frequency of once every 2 weeks and analyzed for trace metals. Secondly, in order to identify hydrochemical contaminant origin dependant signatures in the Rio Santa watershed, 5 areas of known contamination origins were sampled during the summer 2014.Spatially speaking, we observed that most pollution is located in the south of the watershed, and that a large part of the arsenic that reaches the Santa in an aqueous phase does not make it to the outlet but remains trapped in the riverbed. Annual variation in water shows a very unusual fluctuation in Mn compare to other trace metal which are relatively stable. By differencing anthropogenic and natural sites and by considering glaciers melt and decrease water in future what would be the impact of the part of natural contaminated sites versus anthropogenic, mining and cities, on the water quality? Preliminary results show that anthropogenic sites
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Glas, R. L.; Lautz, L.; McKenzie, J. M.; Moucha, R.; Mark, B. G.
2017-12-01
Geological and depositional conditions of the glaciated Cordillera Blanca in Peru have given way to proglacial aquifer systems that contribute substantially to regional streams and rivers, particularly during the dry season. As glacial retreat accelerates, the dry season water budget will be increasingly dominated by groundwater inputs, although predictions of future groundwater quantities require estimations of groundwater storage capacity, aquifer extents, and groundwater residence time. We present a characterization of the sediment structure in a prototypical proglacial valley in the central portion of the range, the Quilcayhuanca Valley. Northern and Central valleys of the Cordillera Blanca feature ubiquitous talus deposits that line the steep granite walls, and have become partially buried beneath lacustrine sediments deposited in proglacial lake beds. The portion of the talus still exposed near the valley walls provides recharge to deeper portions of the valley aquifers that underlie lacustrine clay, resulting in a confined aquifer system that is connected to the surface via perennial springs. Seismic refraction surveys reveal an interface separating relatively slow ( 400-800 m/s) and fast ( 2500 m/s) p-wave velocities. The depth of this refractor coincides with the depth to buried talus observed in drilling records. Electrical resistivity tomography profiles of the same transect show depths near the buried talus to be relatively conductive (10-100 Ωm). At these depths, we hypothesize that electrical conductance is elevated by saturated clay particles in the sediment matrix of the talus deposit. The resistivity models all show a more resistive ( 700 Ω m) region at depth, likely corresponding to a more hydraulically conductive material. The resistive zone is interpreted to be a deeper portion of a buried talus deposit that did not accumulate clay in the matrix. Other possibilities include a thick deposit of gravelly glacial outwash, or a relatively clay
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Development and Engineering Design in Support of "Rover Ranch": A K-12 Outreach Software Project
Pascali, Raresh
2003-01-01
A continuation of the initial development started in the summer of 1999, the body of work performed in support of 'ROVer Ranch' Project during the present fellowship dealt with the concrete concept implementation and resolution of the related issues. The original work performed last summer focused on the initial examination and articulation of the concept treatment strategy, audience and market analysis for the learning technologies software. The presented work focused on finalizing the set of parts to be made available for building an AERCam Sprint type robot and on defining, testing and implementing process necessary to convert the design engineering files to VRML files. Through reverse engineering, an initial set of mission critical systems was designed for beta testing in schools. The files were created in ProEngineer, exported to VRML 1.0 and converted to VRML 97 (VRML 2.0) for final integration in the software. Attributes for each part were assigned using an in-house developed JAVA based program. The final set of attributes for each system, their mutual interaction and the identification of the relevant ones to be tracked, still remain to be decided.
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Thermal environment characterization for the bovine cattle ranching in the Valle del Cauca, Colombia
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Raúl Andres Molina Benavides
2016-10-01
Full Text Available The influence of climate on animal behavior has been demonstrated for many years. Climatic variables such as temperature (T, ° C, relative humidity (RH, %, solar radiation (SR, W / m2 and wind speed (WS, m / s, outside their normal range, can displace ruminants of their comfort zone, which can results in negative impact on their productivity and reproduction behavior. In order to characterize the thermal environment of bovine cattle ranching in the Valle del Cauca department, two biometeorological indexes (heat load index for dairy cows and meat cattle were performed to develop an animal - environment relationship. The indexes were applied to the most representative Valle del Cauca department climatic ranges (T = 20-35; RH = 60-100; WS = 0-10, finding that for dairy cows under the mentioned conditions of T> 23, RH> 80 and 0 WS, starting to show signals of heat stress, while for beef cattle starts with T> 25, RH> 60 and WS <1.5. In conclusion, these indexes are useful tools to determine the degree of heat stress that may occur on farms during certain times of day for certain months of the year, helping to plan actions to control its effect in cattle and subsequently, mitigate the impacts on their productive and reproductive performance.
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Lerner, Amy M.; Zuluaga, Andrés Felipe; Chará, Julián; Etter, Andrés; Searchinger, Timothy
2017-08-01
A growing population with increasing consumption of milk and dairy require more agricultural output in the coming years, which potentially competes with forests and other natural habitats. This issue is particularly salient in the tropics, where deforestation has traditionally generated cattle pastures and other commodity crops such as corn and soy. The purpose of this article is to review the concepts and discussion associated with reconciling food production and conservation, and in particular with regards to cattle production, including the concepts of land-sparing and land-sharing. We then present these concepts in the specific context of Colombia, where there are efforts to increase both cattle production and protect tropical forests, in order to discuss the potential for landscape planning for sustainable cattle production. We outline a national planning approach, which includes disaggregating the diverse cattle sector and production types, identifying biophysical, and economic opportunities and barriers for sustainable intensification in cattle ranching, and analyzing areas suitable for habitat restoration and conservation, in order to plan for both land-sparing and land-sharing strategies. This approach can be used in other contexts across the world where there is a need to incorporate cattle production into national goals for carbon sequestration and habitat restoration and conservation.
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Lerner, Amy M; Zuluaga, Andrés Felipe; Chará, Julián; Etter, Andrés; Searchinger, Timothy
2017-08-01
A growing population with increasing consumption of milk and dairy require more agricultural output in the coming years, which potentially competes with forests and other natural habitats. This issue is particularly salient in the tropics, where deforestation has traditionally generated cattle pastures and other commodity crops such as corn and soy. The purpose of this article is to review the concepts and discussion associated with reconciling food production and conservation, and in particular with regards to cattle production, including the concepts of land-sparing and land-sharing. We then present these concepts in the specific context of Colombia, where there are efforts to increase both cattle production and protect tropical forests, in order to discuss the potential for landscape planning for sustainable cattle production. We outline a national planning approach, which includes disaggregating the diverse cattle sector and production types, identifying biophysical, and economic opportunities and barriers for sustainable intensification in cattle ranching, and analyzing areas suitable for habitat restoration and conservation, in order to plan for both land-sparing and land-sharing strategies. This approach can be used in other contexts across the world where there is a need to incorporate cattle production into national goals for carbon sequestration and habitat restoration and conservation.
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Directory of Open Access Journals (Sweden)
Adriana Marcela Pérez Rodríguez
2018-06-01
Full Text Available En este artículo exploro aspectos de mi trayectoria de blanquitud, por medio de un análisis de la racialización del género en Cúcuta y Bogotá, Colombia. A partir de un ejercicio autoetnográfico de la memoria, consigno experiencias en mi diario de campo para interpretar mi proceso de constitución como sujeta blanca y mi participación en la construcción de representaciones lícitas y sancionables de feminidades racializadas. Estos procesos estaban análogamente vinculados a las luchas por la racialización de los espacios, como mi barrio o la institución de educación superior en la que estudié, y la designación de sus legítimos propietarios.
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A geologic and geophysic study of the Sierra de Pena Blanca, in the state of Chihuahua, Mexico
International Nuclear Information System (INIS)
Lopez S, F.A.
1976-01-01
Within the sistematic aerial exploration program realized by the Instituto Nacional de Energia Nuclear, an aeroradiometric study was carried out in the zone which includes Sierra de Pena Blanca. This study took into consideration the former and present geological investigations and compromised the sierra together with the bordering valleys. The main objective consists in the localization of areas presenting favorable conditions for the existence of uranium isotopes minerlization, in order to determine a mineralized body or ore deposit. For that purpose the area was explored with an airplane to which a differential gamma rays spectrometer was adapted, this spectrometer will show us clearly the integration of the number of radiations which fall into the detectors obtaining this way a valuable information about the radiometric anomalous sites of the studied zone and also about the existence of bismuth, thallium and the abundant potassium of the igneous rocks. These anomalies are under the stage of ground verification, this stage includes a superficial study and the study of the underlying rocks through drilling, radiometric logs and chemical analysis of the samples. In fact, through this method we can obtain very truthful data. (author)
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Directory of Open Access Journals (Sweden)
Ilena Zanella
2012-11-01
Full Text Available Doce especies de tiburones habitan las aguas del Parque Nacional Isla del Coco (PNIC y uno de los más abundantes es el tiburón punta blanca de arrecife, Triaenodon obesus. El presente estudio determinó la abundancia, tallas y estructura de la población de esta especie en la zona de Bahía Chatham, PNIC. Se utilizó el método de marcaje y recaptura y se realizaron conteos subacuáticos visuales, con el fin de determinar su abundancia relativa y contabilizar recapturas visuales. Los tiburones punta blanca de Bahía Chatham no presentan segregación ontogénica espacial definida; pero si una alta fidelidad a los a sitios de residencia dentro de esta bahía. La longitud total promedio de los tiburones marcados fue de 101.8±12.1cm, con una longitud total máxima de 130.0cm y una mínima de 71.0cm. La mediana de las longitudes totales de los tiburones machos (103.5±21.33cm y hembras (100.1±11.2cm no difirieron significativamente (H = 1.78; p=0.1818. La abundancia relativa en Bahía Chatham, PNIC fue de 49.5±10.4 tiburones/h. El tamaño estimado de la población usando el método de de captura-recaptura fue de 408 (IC=181-1050.
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Skilbrei, O T; Finstad, B; Urdal, K; Bakke, G; Kroglund, F; Strand, R
2013-01-01
The impact of salmon lice on the survival of migrating Atlantic salmon smolts was studied by comparing the adult returns of sea-ranched smolts treated for sea lice using emamectin benzoate or substance EX with untreated control groups in the River Dale in western Norway. A total of 143 500 smolts were released in 35 release groups in freshwater from 1997 to 2009 and in the fjord system from 2007 to 2009. The adult recaptures declined gradually with release year and reached minimum levels in 2007. This development corresponded with poor marine growth and increased age at maturity of ranched salmon and in three monitored salmon populations and indicated unfavourable conditions in the Norwegian Sea. The recapture rate of treated smolts was significantly higher than the controls in three of the releases performed: the only release in 1997, one of three in 2002 and the only group released in sea water in 2007. The effect of treating the smolts against salmon lice was smaller than the variability in return rates between release groups, and much smaller that variability between release years, but its overall contribution was still significant (P < 0.05) and equivalent to an odds ratio of the probability of being recaptured of 1.17 in favour of the treated smolts. Control fish also tended to be smaller as grilse (P = 0.057), possibly due to a sublethal effect of salmon lice. PMID:23311746
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Galos, S.; Mölg, T.; MacDonell, S.; Großhauser, M.; Marzeion, B.
2012-04-01
Like in most regions of the world, tropical glaciers in the Peruvian Andes have experienced considerable mass loss during the last decades. In order to better understand and correctly interpret the ongoing glacier changes in this region, we need to examine the driving processes behind these changes. Therefore we installed several automatic weather stations (AWS) in the Cordillera Blanca mountain range. Two of these stations are situated in the ablation area of Glaciar Shallap and Glaciar Artesonraju, while four other stations were established in the vicinity of the two glaciers. The resulting eight year record of meteorological data is analyzed and finally used as input for a physically based numerical energy and mass balance model, which in a first step was applied to the ablation zone of Glaciar Artesonraju (8.96° S / 77.63° W). In July 2010, eddy covariance measurements were carried out on the glacier surface. The resulting data was used to calibrate the parametrization scheme for the turbulent fluxes of sensible and latent heat. Finally the model output was validated against ablation data from a sonic ranger and from single stake ablation measurements. The model results were interpreted with special respect to the seasonal fluctuation in atmospheric moisture (tropical wet / dry season).
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Bravo, M. E.; Aliotta, S.; Fiori, S.; Ginsberg, S.
2018-03-01
There has been a growing interest in the study of shallow gas due its importance in relation to the marine environment, climate change and human activities. In Bahía Blanca estuary, Argentina, shallow gas has a wide distribution. Acoustic turbidity and blanking are the main seismic evidence for the presence of shallow gas in the estuary. The former prevails in the inner sector of the estuary where gas is either near or in contact with the seabed. Gas deposits are generally associated with paleochannels corresponding to the Holocene paleodeltaic environment. Distribution studies of shallow gas in this estuary are necessary because its presence implies not only a geological risk for harbor activities but also because it may have noxious effects on the marine ecosystem, mainly on benthic communities. The comparison of benthic communities at a gas site (GS) with those at a control site (CS) indicated that gas could generate impoverishment in terms of individuals' abundance (GS: N = 357; CS: N = 724). Also, diversity indices showed great differences in the community structure at each site. This indicates that methane gas may act as a natural disturbance agent in estuarine ecosystems. The presence of gas in seabed sediments must therefore be taken into account when distribution studies are conducted of estuarine benthic communities.
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Directory of Open Access Journals (Sweden)
C\\u00E9sar Vences-Contreras
2008-01-01
Full Text Available El presente estudio tuvo como finalidad el desarrollar la técnica de inoculación in vitro de la roya blanca, con el objeto de ahorrar tiempo y espacio en la caracterización de los distintos cultivares de crisantemo respecto al grado de susceptibilidad o resistencia a este patógeno. En Tenancingo, Estado de México, en el periodo 2004-2005 se colectaron hojas de crisantemo que presentaban daños por la enfermedad, se desinfectaron para posteriormente inocular las pústulas sobre plantas creciendo bajo condiciones in vitro. El recipiente de cultivo se mantuvo a una humedad relativa alrededor del 95% y temperaturas entre los 13 y 27 ºC, bajo condiciones de luz y oscuridad. Los daños por la enfermedad se manifestaron a los 20 días después de la inoculación. Los tratamientos a 17 ºC y oscuridad generaron un mayor número de pústulas (18,7. El diámetro de las pústulas fluctuó entre los 0,71 mm (tratamientos con 17 ºC y luz a los 1,79 mm en los tratamientos con 19 ºC y bajo oscuridad.
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Directory of Open Access Journals (Sweden)
M. L. Gertiser
2010-06-01
Full Text Available Algunas especies del género Acanthamoeba provocan queratitis amebiana (QA, una infección de la córnea muy dolorosa, generalmente unilateral, con compromiso importante de la visión. Se presenta el caso de una mujer de 31 años usuaria de lentes de contacto con hábitos inadecuados de higiene y conservación de las lentes. La paciente consultó por enrojecimiento y dolor intenso en el ojo derecho, de dos meses de evolución. Luego del examen oftalmológico y ante la sospecha de una etiología parasitaria se realizó una biopsia de la zona lesionada, que se destinó al análisis bacteriológico y parasitológico en el laboratorio. También se remitieron los líquidos de lavado y el estuche de las lentes. No se detectó crecimiento bacteriano en las muestras. Los cultivos para la búsqueda de Acanthamoeba resultaron positivos en todos los especímenes analizados. Las amebas aisladas fueron clasificadas morfológica y molecularmente como pertenecientes al género Acanthamoeba. El presente trabajo muestra el primer caso de queratitis por Acanthamoeba de la ciudad de Bahía Blanca identificado por el laboratorio mediante procedimientos de alto valor diagnóstico.Some species of the Acanthamoeba genus cause keratitis, a very painful, most likely unilateral corneal infection , associated with eye and vision impairment. We here present a case of a 31-year-old female patient, a regular user of soft contact lenses without good practices of lens hygiene and handling. The patient attended medical consultation after two months of inflammation and pain in her right eye. After ophthalmological studies, and due to suspicion of a parasitic infection, a biopsy was performed and the sample submitted for bacteriological and parasitological analyses. Moreover, contact lens holders and lens cleaning solutions were studied. The samples yielded negative results for bacterial infection. However, cultivation of all samples showed the presence of amoeboid parasites
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Donnellan, Andrea; Parker, Jay; Hensley, Scott; Pierce, Marlon; Wang, Jun; Rundle, John
2014-03-01
4 April 2010 M 7.2 El Mayor-Cucapah earthquake that occurred in Baja California, Mexico and terminated near the U.S. Mexican border caused slip on the Imperial, Superstition Hills, and East Elmore Ranch Faults. The pattern of slip was observed using radar interferometry from NASA's Uninhabited Aerial Vehicle Synthetic Aperture Radar (UAVSAR) instrument collected on 20-21 October 2009 and 12-13 April 2010. Right-lateral slip of 36 ± 9 and 14 ± 2 mm occurred on the Imperial and Superstition Hills Faults, respectively. Left-lateral slip of 9 ± 2 mm occurred on the East Elmore Ranch Fault. The widths of the zones of displacement increase northward suggesting successively more buried fault motion to the north. The observations show a decreasing pattern of slip northward on a series of faults in the Salton Trough stepping between the El Mayor-Cucapah rupture and San Andreas Fault. Most of the motion occurred at the time of the M 7.2 earthquake and the UAVSAR observations are consistent with field, creepmeter, GPS, and Envisat observations. An additional 28 ± 1 mm of slip at the southern end of the Imperial Fault over a <1 km wide zone was observed over a 1 day span a week after the earthquake suggesting that the fault continued to slip at depth following the mainshock. The total moment release on the three faults is 2.3 × 1023-1.2 × 1024 dyne cm equivalent to a moment magnitude release of 4.9-5.3, assuming shallow slip depths ranging from 1 to 5 km.
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Water Resources and Groundwater in a Glaciated Andean Watershed (Cordillera Blanca, Peru)
McKenzie, J. M.; Gordon, R.; Baraer, M.; Lautz, L.; Mark, B. G.; Wigmore, O.; Chavez, D.; Aubry-Wake, C.
2014-12-01
It is estimated that almost 400 million people live in watersheds where glaciers provide at least 10% of the runoff, yet many questions remain regarding the impact of climate change and glacier recession on water resources derived from these high mountain watersheds. We present research from the Cordillera Blanca, Peru, an area with the highest density of glaciers in the tropics. While glacier meltwater buffers stream discharge throughout the range, groundwater is a major component of dry season runoff, contributing up to 50-70% of outflow in some tributaries. In order to predict future changes to water resources it is critical to understand how groundwater can offset future hydrologic stress by maintaining stream baseflow, including recharge mechanisms, subsurface pathways, storage, and net fluxes to rivers. We present a synthesis of results based on hydrologic modeling, drilling/piezometers, geophysics, and artificial and natural hydrologic tracers. Our findings show that 'pampas', low-relief mountain valleys, are critical for baseflow generation by storing groundwater on interannual timescales. Pampas have a total area of ~65 km2 and are comprised of unconsolidated glacial, talus, lacustrine and wetland (bofedales) deposits. The valleys commonly have buried talus aquifers that are overlain by low permeability, glaciolacustrine deposits. Glaciofluvial outwash deposits and small wetlands also act as unconfined aquifers. These groundwater systems appear to be primarily recharged by wet season precipitation, and at higher elevations also by glacial meltwater. Additionally a ubiquitous feature in the valleys are springs, often located at the base of talus deposits, which generate a large hydrologic flux within the hydrologic systems. While glaciers are the most visible and vulnerable component of the Andean waterscape, we argue that it is crucial to understand the complete mountain hydrologic cycle, including groundwater, in order to understand the ongoing
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PHASE ANALYSES OF URANIUM BEARING MINERALS FROM THE HIGH GRADE ORE, NOPAL I, PENA BLANCA, MEXICO
International Nuclear Information System (INIS)
Ren, M.; Goodell, P.; Kelts, A.; Anthony, E.Y.; Fayek, M.; Fan, C.; Beshears, C.
2005-01-01
The Nopal I uranium deposit is located in the Pena Blanca district, approximately 40 miles north of Chihuahua City, Mexico. The deposit was formed by hydrothermal processes within the fracture zone of welded silicic volcanic tuff. The ages of volcanic formations are between 35 to 44 m.y. and there was secondary silicification of most of the formations. After the formation of at least part of the uranium deposit, the ore body was uplifted above the water table and is presently exposed at the surface. Detailed petrographic characterization, electron microprobe backscatter electron (BSE) imagery, and selected x-ray maps for the samples from Nopal I high-grade ore document different uranium phases in the ore. There are at least two stages of uranium precipitation. A small amount of uraninite is encapsulated in silica. Hexavalent uranium may also have been a primary precipitant. The uranium phases were precipitated along cleavages of feldspars, and along fractures in the tuff. Energy dispersive spectrometer data and x-ray maps suggest that the major uranium phases are uranophane and weeksite. Substitutions of Ca and K occur in both phases, implying that conditions were variable during the mineralization/alteration process, and that compositions of the original minerals have a major influence on later stage alteration. Continued study is needed to fully characterize uranium behavior in these semi-arid to arid conditions
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PHASE ANALYSES OF URANIUM-BEARING MINERALS FROM THE HIGH GRADE ORE, NOPAL I, PENA BLANCA, MEXICO
Energy Technology Data Exchange (ETDEWEB)
M. Ren; P. Goodell; A. Kelts; E.Y. Anthony; M. Fayek; C. Fan; C. Beshears
2005-07-11
The Nopal I uranium deposit is located in the Pena Blanca district, approximately 40 miles north of Chihuahua City, Mexico. The deposit was formed by hydrothermal processes within the fracture zone of welded silicic volcanic tuff. The ages of volcanic formations are between 35 to 44 m.y. and there was secondary silicification of most of the formations. After the formation of at least part of the uranium deposit, the ore body was uplifted above the water table and is presently exposed at the surface. Detailed petrographic characterization, electron microprobe backscatter electron (BSE) imagery, and selected x-ray maps for the samples from Nopal I high-grade ore document different uranium phases in the ore. There are at least two stages of uranium precipitation. A small amount of uraninite is encapsulated in silica. Hexavalent uranium may also have been a primary precipitant. The uranium phases were precipitated along cleavages of feldspars, and along fractures in the tuff. Energy dispersive spectrometer data and x-ray maps suggest that the major uranium phases are uranophane and weeksite. Substitutions of Ca and K occur in both phases, implying that conditions were variable during the mineralization/alteration process, and that compositions of the original minerals have a major influence on later stage alteration. Continued study is needed to fully characterize uranium behavior in these semi-arid to arid conditions.
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Stansell, N.; Rodbell, D. T.; Moy, C. M.
2010-12-01
Pro-glacial lake sediments from the Cordillera Blanca, Peru contain continuous records of climate variability spanning the Last Glacial Maximum to present day. Here we present results from two alpine lake basins in the Queshgue Valley (9.8°S, 77.3°W) that contain high-resolution records of clastic sediment deposition for the last ~20,000 years. Radiocarbon-dated sediment cores were scanned at 0.5 to 1.0 cm resolution using a profiling x-ray fluorescence scanner for major and minor element distributions. In addition, we measured down-core variations in magnetic susceptibility, organic carbon, biogenic silica and calcium carbonate. Samples of bedrock and sediments from glacial moraines in the Queshgue watershed were analyzed using an ICP-MS in order to fingerprint and trace the source of glacial sediments deposited in the lakes. The bedrock is dominated by a combination of granodiorite with high Sr concentrations and meta-sedimentary rocks with high Zr values. Because the glacial sediments proximal to the modern glacier terminus are composed mostly of the granodiorite end-member, we interpret changes in Sr and clastic sediment concentrations in the lake sediment profiles as proxies for past glacial variability. Preliminary results indicate that glaciers retreated soon after ~14,500 cal yr BP and remained less extensive during the remaining late Glacial Stage and early Holocene. Gradually increasing clastic sediments through the middle and late Holocene indicate that glaciers became progressively larger, or more erosive towards present day. However, this overall Holocene trend of increasing glacier extent was interrupted by multiple periods of centennial- to millennial-scale ice margin retreat. For example, relative peaks in clastic sediments occurred from ~14,500 to 6000, 5600 to 5000, 4600 to 4200, 3600 to 3200, 2800 to 2700, 2400 to 2200, 1750 to 1550, 1100 to 900 cal yr BP, and during the Little Ice Age (~700 to 50 cal yr BP), while periods of low clastic
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Clark, Charlotte; Crombie, Rosanna; Head, Jenny; van Kamp, Irene; van Kempen, Elise; Stansfeld, Stephen A.
2012-01-01
The authors examined whether air pollution at school (nitrogen dioxide) is associated with poorer child cognition and health and whether adjustment for air pollution explains or moderates previously observed associations between aircraft and road traffic noise at school and children's cognition in the 2001–2003 Road Traffic and Aircraft Noise Exposure and Children's Cognition and Health (RANCH) project. This secondary analysis of a subsample of the United Kingdom RANCH sample examined 719 children who were 9–10 years of age from 22 schools around London's Heathrow airport for whom air pollution data were available. Data were analyzed using multilevel modeling. Air pollution exposure levels at school were moderate, were not associated with a range of cognitive and health outcomes, and did not account for or moderate associations between noise exposure and cognition. Aircraft noise exposure at school was significantly associated with poorer recognition memory and conceptual recall memory after adjustment for nitrogen dioxide levels. Aircraft noise exposure was also associated with poorer reading comprehension and information recall memory after adjustment for nitrogen dioxide levels. Road traffic noise was not associated with cognition or health before or after adjustment for air pollution. Moderate levels of air pollution do not appear to confound associations of noise on cognition and health, but further studies of higher air pollution levels are needed. PMID:22842719
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Clark, Charlotte; Crombie, Rosanna; Head, Jenny; van Kamp, Irene; van Kempen, Elise; Stansfeld, Stephen A
2012-08-15
The authors examined whether air pollution at school (nitrogen dioxide) is associated with poorer child cognition and health and whether adjustment for air pollution explains or moderates previously observed associations between aircraft and road traffic noise at school and children's cognition in the 2001-2003 Road Traffic and Aircraft Noise Exposure and Children's Cognition and Health (RANCH) project. This secondary analysis of a subsample of the United Kingdom RANCH sample examined 719 children who were 9-10 years of age from 22 schools around London's Heathrow airport for whom air pollution data were available. Data were analyzed using multilevel modeling. Air pollution exposure levels at school were moderate, were not associated with a range of cognitive and health outcomes, and did not account for or moderate associations between noise exposure and cognition. Aircraft noise exposure at school was significantly associated with poorer recognition memory and conceptual recall memory after adjustment for nitrogen dioxide levels. Aircraft noise exposure was also associated with poorer reading comprehension and information recall memory after adjustment for nitrogen dioxide levels. Road traffic noise was not associated with cognition or health before or after adjustment for air pollution. Moderate levels of air pollution do not appear to confound associations of noise on cognition and health, but further studies of higher air pollution levels are needed.
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Directory of Open Access Journals (Sweden)
Silvia Gorenstein
2005-05-01
Full Text Available Este artículo examina la estructura institucional-regulatoria resultante de la privatización portuaria efectuada en Argentina durante los años noventa, en el marco de las transformaciones sectoriales a escala mundial y del andamiaje conceptual que sostiene nuevos formatos institucionales para reemplazar el rol antes desempeñado por el Estado nacional. ¿Cómo funciona la nueva institución portuaria, con parcelas de poder compartidas entre el sector público y los segmentos privados involucrados en la actividad? ¿En qué medida esta institucionalidad ha operado sobre las condiciones de governance local? Desde estos interrogantes centrales, el artículo se focaliza en las experiencias de los puertos de Bahía Blanca y Rosario, analizando las implicancias de una reconfiguración institucional modelada por la valorización del capital privado y mediada por el ejercicio de un poder público compartido entre dos niveles territoriales (provincia-municipio. De aquí se infieren temas que replantean la visión del puerto como fuerza propulsora del desarrollo económico territorial, y que se discuten revisando la naturaleza de los vínculos ciudad-puerto y los alcances de su proyección en la economía local desde la reformaThis paper analyzes the institutional and regulatory structures emerging from port privatization during the 90s in Argentina. The study departs from main sector transformations taking place at global scale and is based on the conceptual framework that sustains new institutional forms replacing former national government role. This new port institution shares power between public and private actors. How does it function? In what sense this new institution influences on local governance conditions? Departing from these central questions, this article focuses in Bahia Blanca and Rosario ports experiences, analyzing some consequences emerging from an institutional reform modeled by private capital valorization and mediated by a
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Directory of Open Access Journals (Sweden)
Andrea Belén Rodríguez
2014-04-01
Full Text Available El presente artículo pretende analizar los significados y representaciones condensados en los emprendimientos para establecer lugares de la memoria de Malvinas en Bahía Blanca desde 1982 hasta el 2012, contextualizándolos en las luchas por la memoria de la guerra a nivel local y nacional. Hace foco en tres iniciativas para construir memoriales de Malvinas en esta ciudad del sudoeste bonaerense –que se imaginó históricamente como la “Capital del sur argentino” y “Puerta de la Patagonia”-, haciendo hincapié en los actores que se involucraron en las “batallas por la marca”, sus objetivos y proyectos, así como en las coyunturas de activación memorial.
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Directory of Open Access Journals (Sweden)
Miguel Ángel Mendoza R.
2013-06-01
Full Text Available La cachama blanca (Piaractus brachypomus es la segunda fuente de producción piscícola en Colombia, después de la tilapia roja (Oreochomi ssp. y antes de la trucha arcoíris (Oncorhynchus mykiss. Se destaca, además, como una de las especies con mayor potencial productivo en el país. Se realizó el estudio histológico del sistema digestivo de la Piaractus brachypomus a fin determinar la morfología normal en diferentes estadios de desarrollo. Para ello se clasificaron los animales según la edad, el tamaño y el peso en ovas embrionadas, larvas con saco vitelino, alevinos después de reabsorción de saco vitelino, juveniles (3-5 cm, 5-7 cm, 10 cm, 15 cm y adultos (300 g. La fijación de los tejidos se realizó en formaldehído al 3,7 % y se describió microscópicamente cavidad bucal, faringe, esófago, estómago, ciegos pilóricos, intestinos y las glándulas anexas, hígado y páncreas. Por último, se describió macroscópicamente la organización anatómica de este sistema.
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Delta progradation and Neoglaciation, Laguna Parón, Cordillera Blanca, Peru
Seltzer, Geoffrey O.; Rodbell, Donald T.
2005-10-01
The history of Holocene glaciation serves as an important record of glacier mass balance and, therefore, of climatic change. The moraine record of Holocene glaciation in the tropical Andes, however, is fragmentary and poorly dated. In contrast, increases in the rate of accumulation of inorganic sediment in glacier-fed lakes have been linked to periods of Neoglaciation in many mountain regions. The interpretation of such a record of Neoglaciation from sediment cores in glacier-fed lakes in the tropical Andes can provide the continuity and chronologic control that is lacking in the existing moraine record. Unusual exposures of glacial lacustrine sediment in the Cordillera Blanca, Peru, provide a rare opportunity to assess the link between climatic change, glaciation, and lacustrine sedimentation.Intentional lowering of water levels in Laguna Parón (9°S, 77°44 W, 4200 m a.s.l.) in 1985 resulted in the incision and exposure of at least 20 m of deltaic deposits at the eastern end of the lake. Three deltaic units can be identified: horizontal topset beds, steeply dipping and deformed foreset beds, and horizontally laminated fine-grained sediment. Six radiocarbon ages ranging from 1800 +/- 210 to 465 +/- 95 14C yr BP on wood indicate that the average rate of delta progradation in the late Holocene has been approximately 290 m per 1000 yr. The lake formed during deglaciation at least 10 000 yr ago and if such a rate of progradation of the delta had prevailed over the entire Holocene, then the delta would be at least three times as extensive as it is today. Thus the rate of delta progradation has varied significantly over the Holocene. We suggest that the rate of delta progradation was at least three times greater when glaciers were in advanced positions. These positions are clearly delimited by Neoglacial moraines, which are within 1-2 km of the exposures studied and within 1 km of modern ice limits. The most recent increase in the rate of delta progradation is
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U-Series Disequilibria in Soils, Pena Blanca Natural Analog, Chihuahua, Mexico
International Nuclear Information System (INIS)
D. French; E. Anthony; P. Goodell
2006-01-01
The Nopal I uranium deposit located in the Sierra Pena Blanca, Mexico. The deposit was mined in the early 1980s, and ore was stockpiled close by. This stockpile area was cleared and is now referred to as the Prior High Grade Stockpile (PHGS). Some of the high-grade boulders from the site rolled downhill when it was cleared in the 1990s. For this study soil samples were collected from the alluvium surrounding and underlying one of these boulders. A bulk sample of the boulder was also collected. Because the Prior High Grade Stockpile had no ore prior to the 1980s a maximum residence time for the boulder is about 25 years, this also means that the soil was at background as well. The purpose of this study is to characterize the transport of uranium series radionuclides from ore to the soil. Transport is characterized by determining the activities of individual radionuclides and daughter to parent ratios. Isotopes of the uranium series decay chain detected include 210 Pb, 234 U, 230 Th, 226 Ra, 214 Pb, and 214 Bi. Peak areas for each isotope are determined using gamma-ray spectroscopy with a Canberra Ge (Li) detector and GENIE 2000 software. The boulder sample is close to secular equilibrium when compared to the standard BL-5 (Beaver Lodge Uraninite from Canada). Results for the soils, however, indicate that some daughter/parent pairs are in secular disequilibrium. These daughter/parent (D/P) ratios include 230 Th/ 234 U, which is greater than unity, 226 Ra/ 230 Th, which is also greater than unity, and 210 Pb/ 214 Bi, which is less than unity. The gamma-ray spectrum for organic material lacks 230 Th peaks, but contains 234 U and 226 Ra, indicating that plants preferentially incorporate 226 Ra. Our results, combined with previous studies require multistage history of mobilization of the uranium series radionuclides. Earlier studies at the ore zone could limit the time span for mobilization only to a few thousand years. The contribution of this study is that the short
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Directory of Open Access Journals (Sweden)
F. Ferrelli
2016-04-01
Full Text Available El crecimiento de las ciudades genera modificaciones en la atmósfera local que pueden afectar la confortabilidad y calidad de vida de la población. El objetivo del presente trabajo fue comparar la evolución de la isla de calor de verano e invierno entre los años 1985 y 2014 en Bahía Blanca (Argentina. Esta ciudad ha sufrido un importante aumento de la población y de las actividades industriales en los últimos años. Se estudió el aumento de la zona urbana construida, las variaciones espaciales de temperatura y humedad relativa y el crecimiento de la población. Se calcularon índices de confort climático (Humidex, Termohigrométrico y Temperatura Equivalente. La zona urbana construida se extendió más de 110 km² y el incremento de la población fue de 22,4 %. Las modificaciones en el espacio urbano, junto con una mayor densidad de edificios, generaron cambios en las temperaturas de verano de 1985 y 2014. En la primera el centro de la ciudad fue más cálido que las zonas periféricas. La zona más confortable fue la costera. En 2014, en el centro de la ciudad se presentaron las temperaturas más altas y las zonas más confortables fueron las periféricas y los parques. Las mediciones de invierno no registraron diferencias considerables entre sí en las mediciones nocturnas. Los resultados demostraron que el crecimiento de las edificaciones y el incremento de la población de Bahía Blanca modificaron la distribución espacial de la temperatura y la humedad relativa y generaron situaciones de desconfort. Estos resultados generaron información necesaria para futuros planes de desarrollo urbano.
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Directory of Open Access Journals (Sweden)
Juan Raúl Duque Zapata
2004-12-01
Full Text Available En la cuenca de la quebrada Piedras Blancas se evaluó la persistencia de la repelencia al agua en el horizonte A de Andisoles bajo tres coberturas vegetales: Pinus patula, Cupressus lusitanica y Quercus humboldtii y en tres posiciones topográficas diferentes a lo largo de la vertiente de colinas bajas, mediante el método de WDPT, en muestras con la humedad de campo y secas al aire. En todas las coberturas se encontró repelencia al agua en los suelos. Además, cuando las muestras fueron secadas al aire, la persistencia de la repelencia al agua se incrementó. Se encontró diferencia significativa en la distribución de la persistencia de la repelencia al agua entre las coberturas y entre las posiciones en la vertiente de las colinas, sin que se presentara un comportamiento similar para las tres coberturas. Los suelos bajo cobertura de ciprés fueron los que presentaron los mayores valores de WDPT en todas las condiciones de medida, siendo este el primer reporte que se hace en la literatura, con un amplio respaldo muestral, de repelencia al agua en suelos bajo dicha cobertura vegetal. En ninguno de los casos, la humedad de las muestras fue el parámetro que explicara el comportamiento observado en la repelencia al agua de los suelos estudiados.The persistence of water repellency in the A horizon of Andisols was evaluated in the Piedras Blancas watershed under three vegetative covers: Pinus patula, Cupressus lusitanica, and Quercus humboldtii, and in three different topographic conditions across the slope of a low hill, using the WDPT method with samples containing field humidities and airdried samples. In all vegetative covers, water repellency of the soils was documented. Also, when the samples were air-dried, the persistency of the water repellency increased. A significant difference in the distribution of water repellency was documented among the different vegetative covers and topographic conditions, without a consistent pattern for the
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Carpio Cordero, Ximena; Orellana Rodas, Johanna
2010-01-01
El presente trabajo muestra los resultados e impacto real que se dio en el Ecuador en año 2009 luego de la implementación de las medidas gubernamentales en salvaguardias, aranceles y cupos a la importación de Línea Blanca y Línea Café. Para ello se vio en primer lugar la necesidad de realizar un estudio sobre el comportamiento y evolución de las importaciones totales del Ecuador desde el año 2004 hasta el año 2008, con el fin de identificar sus principales socios comerciales, los principales ...
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Directory of Open Access Journals (Sweden)
Gertrudis Basto-Estrella
2012-06-01
Full Text Available Este estudio describe la fauna de escarabajos estercoleros (Scarabaeidae: Scarabaeinae en ranchos ganaderos del trópico subhúmedo. De enero a diciembre de 2010 se recolectaron 93 274 escarabajos estercoleros pertenecientes a 17 especies de la subfamilia Scarabaeinae con trampas de caída libre cebadas con excremento de ganado bovino en 4 ranchos ganaderos del oriente del estado de Yucatán, México. Las especies más abundantes fueron Onthophagus landolti, seguida por Canthon indigaceus chevrolati, Digitonthophagus gazella, C. leechi y Pseudocanthon perplexus. Se observó que las especies cavadoras tuvieron mayor abundancia y riqueza; las diurnas de talla pequeña tuvieron menor riqueza pero fueron más abundantes en todo el estudio. El conocimiento de la composición faunística de escarabajos estercoleros de la región es un punto de partida para desarrollar estudios del impacto de las actividades humanas y las prácticas de producción ganadera sobre la diversidad de estos insectos.This study describes the fauna of dung beetles (Scarabaeidae: Scarabaeinae in tropical sub-humid cattle ranches. Insects were collected with pitfall traps baited with cattle manure from January to December 2010 in four cattle ranches of eastern state of Yucatán, Mexico. 93 274 dung beetles were collected from 17 species of the subfamily Scarabaeinae. The most abundant species were Onthophagus landolti, followed by Canthon indigaceus chevrolati, Digitonthophagus gazella, C. leechi y Pseudocanthon perplexus. Observations showed that burrowing species had greater abundance and species richness. Diurnal species of small size had lower richness, but were more abundant. Knowledge of the composition of dung beetle fauna of the region is a starting point to develop studies of the impact of human activities and livestock production practices on the diversity of these insects.
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Directory of Open Access Journals (Sweden)
Rafael Meneses
2007-03-01
Full Text Available Con el objetivo de determinar la influencia que ejerce el Virus Hoja Blanca (VHB sobre el insecto, se estudiaron tres colonias de T. orizicolus, procedentes de diferentes zonas arroceras de Colombia (Tolima, Costa y Jamundí En las colonias de Costa (3 años y Tolima, (9 meses, de multiplicación en condiciones semicontroladas de invernadero, no se encontró influencia negativa del virus en la longevidad de machos y hembras, y la fecundidad diaria, no ocurriendo de modo semejante en los insectos de Jamundí (4 meses que si se manifestaron efectos deletéreos en todos los parámetros antes señalados; aspecto éste muy importante en la interacción entre entomólogos, virólogos y mejoradores, en la calidad de las evaluaciones de resistencia a esta plaga y al VHB de las líneas de arroz, depende el grado de resistencia o susceptibilidad de la nuevas variedades comerciales y éste es el principal factor en el Manejo Integrado de T. orizicolus y del VHB.
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Juen, I.; Mölg, T.; Wagnon, P.; Cullen, N. J.; Kaser, G.
2006-12-01
The Cordillera Blanca in Perú is situated in the Outer Tropics spanning from 8 to 10 ° South. Solar incidence and air temperature show only minor seasonal variations whereas precipitation occurs mainly from October to April. An energy balance station was installed on the tongue of glacier Artesonraju (4850 m a.s.l.) in March 2004. In this study each component of the energy balance on the glacier surface is analysed separately over a full year, covering one dry and one wet season. During the dry season glacier melt at the glacier tongue is app. 0.5 m we per month. In the wet season glacier melt is twice as much with 1 m we per month. This is due to higher energy fluxes and decreased sublimation during the wet season. With an energy balance model that has already been proved under tropical climate conditions (Mölg and Hardy, 2004) each energy flux is changed individually to evaluate the change in the amount of glacier melt. First results indicate that a change in humidity related variables affects glacier melt very differently in the dry and wet season, whereas a change in air temperature changes glacier melt more constantly throughout the year.
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Ana M. Roccamo
2010-06-01
Full Text Available La comercialización de animales acuáticos require la implementación de controles sanitarios para la detección de virus patógenos estipulados por la Organización Mundial para la Salud Animal (OIE. De acuerdo con sus normas, y específicamente en lo que se refiere la comercialización de crustáceos, la OIE determina como enfermedades de declaración obligatoria, entre otras, a las denominadas: virus del síndrome de la mancha blanca (WSSV, virus de la cabeza amarilla (YHV y el virus del síndrome de Taura (TSV, las cuales son altamente peligrosas. El objetivo de este estudio fue determinar la presencia o ausencia de estas virosis en poblaciones de langostinos silvestres (Pleoticus muelleri en el estuario de Bahía Blanca, aplicando metodologías bioquímicas, de biología molecular y genéticas. Los resultados demuestran que se ha logrado optimizar la metodología para la extracción y purificación de ADN y ARN de tejido y hemolinfa de langostinos y el correcto manejo en la captura, acondicionamiento y transporte de los animales al laboratorio. Los ensayos fueron debidamente convalidados por reacciones de control negativas y positivas. En las muestras estudiadas de Pleoticus muelleri se descarta la presencia de estas tres enfermedades virales. Esta metodología permite no sólo realizar una detección temprana y un diagnóstico de las tres patologías virales sino también establecer y asegurar un status libre de infección con el consiguiente beneficio sanitario para la región.Trade in aquatic animals calls for the implementation of controls for the detection of pathogenic viruses in line with the regulations of the OIE, the World Organization for Animal Heath. In relation specifically to trade in crustaceans, the OIE identifies the following diseases: White Spot syndrome virus disease (WSSV; Yellow Head Virus disease (YHV; and Taura syndrome virus disease (TSV, all of which are highly dangerous. The purpose of this study was to
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Carmen Esmer; Gabriela Blanco Hernández; Víctor Saavedra Alanís; Jorge Guillermo Reyes Vaca; Antonio Bravo Oro
2017-01-01
Introducción: La leucoencefalopatía con sustancia blanca evanescente es una de las leucodistrofias más frecuentes. Generalmente inicia en la infancia y presenta un patrón de herencia autosómica recesiva. El 90% de los casos manifiesta mutaciones en uno de los genes que codifican para las cinco subunidades del factor de iniciación eucariótica 2 (EIF2B5). El diagnóstico se realiza por las manifestaciones clínicas, hallazgos en la resonancia magnética cerebral y estudios moleculares confirmatori...
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International Nuclear Information System (INIS)
Leroy, J.L.; Aniel, B.; Poty, B.
1987-01-01
Tertiary felsic volcanics of the Sierra Pena Blanca in Mexico host potentially economic uranium deposits, and of Meseta Los Frailes in Bolivia contain interesting U anomalies but no significant deposits. A comparative study of the two uranium districts reveals differences that may explain the different degrees of U concentration. The host ignimbrite in Mexico, namely the Nopal Formation dated at 44 Myr. ago, is potassic alkaline rhyolite which is poorly compacted and contains phenocrysts of quartz, orthoclase, ilmenite and magnetite, totalling 30% of the rock. Vapour phase crystallization is well developed in the Mexican tuff, and has led to a primary concentration of labile U not tied up in refractory accessory minerals, as shown by fission-track studies. The Bolivian tuffs lack such vapour phase primary concentration of U. Subsequent hydrothermal alteration, in particular kaolinization is intense in the Mexican district, but is relatively less intense in the Bolivian one. It is postulated that an intense hydrothermal activity, probably of prolonged duration, in rocks displaying primary enrichment of labile U, is essential to form volcanogenic U deposits of the type found in Mexico. 26 refs.; 13 figs.; 3 plates; 3 tabs
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U-Sries Disequilibra in Soils, Pena Blanca Natural Analog, Chihuahua, Mexico
Energy Technology Data Exchange (ETDEWEB)
D. French; E. Anthony; P. Goodell
2006-03-16
The Nopal I uranium deposit located in the Sierra Pena Blanca, Mexico. The deposit was mined in the early 1980s, and ore was stockpiled close by. This stockpile area was cleared and is now referred to as the Prior High Grade Stockpile (PHGS). Some of the high-grade boulders from the site rolled downhill when it was cleared in the 1990s. For this study soil samples were collected from the alluvium surrounding and underlying one of these boulders. A bulk sample of the boulder was also collected. Because the Prior High Grade Stockpile had no ore prior to the 1980s a maximum residence time for the boulder is about 25 years, this also means that the soil was at background as well. The purpose of this study is to characterize the transport of uranium series radionuclides from ore to the soil. Transport is characterized by determining the activities of individual radionuclides and daughter to parent ratios. Isotopes of the uranium series decay chain detected include {sup 210}Pb, {sup 234}U, {sup 230}Th, {sup 226}Ra, {sup 214}Pb, and {sup 214}Bi. Peak areas for each isotope are determined using gamma-ray spectroscopy with a Canberra Ge (Li) detector and GENIE 2000 software. The boulder sample is close to secular equilibrium when compared to the standard BL-5 (Beaver Lodge Uraninite from Canada). Results for the soils, however, indicate that some daughter/parent pairs are in secular disequilibrium. These daughter/parent (D/P) ratios include {sup 230}Th/{sup 234}U, which is greater than unity, {sup 226}Ra/{sup 230}Th, which is also greater than unity, and {sup 210}Pb/{sup 214}Bi, which is less than unity. The gamma-ray spectrum for organic material lacks {sup 230}Th peaks, but contains {sup 234}U and {sup 226}Ra, indicating that plants preferentially incorporate {sup 226}Ra. Our results, combined with previous studies require multistage history of mobilization of the uranium series radionuclides. Earlier studies at the ore zone could limit the time span for mobilization only
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Directory of Open Access Journals (Sweden)
RUTH AGUILERA
1992-01-01
Full Text Available Existen diferentes maneras de analizar los prejuicios y las discriminaciones raciales. Uno de los mejores indicadores sociales es el matrimonio interracial (por ejemplo, entre razas negra y blanca, que sobrepasa los límites de los grupos establecidos mediante los procesos de racialización. Ante este fenómeno se hace necesario redefinir las nociones de raza, género y cultura en las vidas individuales, así como a nivel social y político. En el artículo se analizan algunos de esos conceptos e indicadores. Se estudian las tasas de matrimonios interraciales como un indicador significativo de la armonía en las relaciones raciales. A partir de esos datos se exponen las teorías existentes y posibles explicaciones del matrimonio entre blancos y negros, utilizando datos recientes de Estados Unidos y Gran Bretaña, analizando también la dinámica de la racionalización en ambos países. Al final se añaden ideas de algunos de los principales estudios españoles.
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Jorge O Spagnuolo
2013-07-01
Full Text Available En la costa norte del estuario de Bahía Blanca, provincia de Buenos Aires, Argentina, se presentan cordones litorales compuestos por arena conchilífera y elevada proporción de rodados de origen sedimentario. Muchos de estos clastos muestran importantes signos de bieorosión. La procedencia de este material se vincula con las extensas plataformas de abrasión presentes al este del estuario (costas de Pehuén Co. Se determinaron dos icnofacies: la icnofacies de Trypanites integrada por Gastrochaenolites, Maeandropolydora, Trypanites, Gnathichnus y Radulichnus, propia de sustratos duros y la icnofacies de Skolithos representada por galerías de Ophiomorpha desarrollada en sustratos blandos. Ambas, caracterizan un ambiente litoral somero. Durante la transgresión holocena, los sustratos costeros se vieron afectados por el avance marino y los fragmentos erosionados fueron transportados por deriva litoral hacia el interior del estuario. Finalmente, eventos de tormenta depositaron en los cordones litorales el material con signos de bioerosión. En la actualidad, muchos de estos rodados que presentan gradación en tamaño hacia el interior del estuario, se hallan en tránsito en las playas por deriva litoral este-oeste.
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SANDRA MONTOYA B.
Full Text Available Este trabajo presenta una vía de rastreo de producción de enzimas lignocelulolíticas en diez especies de hongos de pudrición blanca: Lentinula edodes, Schizophyllum commune, Trametes trogii, Coriolus versicolor, Pycnoporus sanguineus, Ganoderma applanatum, Ganoderma lucidum, Grifola frondosa, Pleurotus ostreatus y Auricularia delicata. Estas especies primero fueron rastreadas sobre medios de cultivo sólido que contienen carboximetil celulosa, celulosa cristalina, ABTS (2,2´-azino-bis(3-etilbenzotiazolina-6-sulfonato y azure B, los cuales evidenciaron la producción de las enzimas endoglucanasa, exoglucanasa, lacasa y lignina peroxidasa (LiP. Las actividades celulolíticas fueron detectadas a los cinco días de incubación con el indicador rojo congo, formándose un halo claro-blanco en las zonas donde se degrada la celulosa. Para las ligninasas, este rastreo consistió en el seguimiento a la formación de halos verdes por oxidación del ABTS para lacasa y halos de decoloración sobre el azure B para la LiP durante 14 días de incubación. De este rastreo cualitativo, se seleccionaron cuatro cepas (G. lucidum, L. edodes, C. versicolor y T. Trogii, como las mejores productoras de enzimas celulolíticas y ligninolíticas. Estas cuatro especies fueron inoculadas sobre un sustrato de aserrín de roble, obteniéndose 51,8% de lignina degradada por L. edodes y 22% de celulosa degrada por C. versicolor.
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Ruiz García, Juan
2017-01-01
La presente tesis doctoral aborda la cuestión del paisaje de las Tierras Bajas mayas y su relación con el urbanismo durante el final del período Clásico (ss. VII - X) a través del caso del sitio arqueológico de La Blanca, situado en el departamento de Petén, Guatemala. El carácter geográfico y espacial del tema de investigación ha requerido del enfoque teórico y metodológico que desarrolla la arqueología del paisaje. Esta parte de la disciplina arqueológica es la que puede abordar las cuestio...
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Recent glacier retreat and lake formation in the Querecocha watershed, Cordillera Blanca, Peru
López Moreno, J.; Valero-Garces, B.; Revuelto, J.; Azorín-Molina, C.; Bazo, J.; Cochachin, A.; Fontaneda, S.; Mark, B. G.
2013-12-01
In the Andes, and specifically in the Peruvian mountains a marked decrease of the glaciated area has occurred since the end of the Little Ice Age, and it has been accelerated since the last decades of the 20th century. As a result of the glacier retreat new pro-glaciar lakes are originated, and often the area and volume of existing ones increases. The study of these newly-formed lakes and their recent evolution may provide a better understanding of the hydrological and geomorphological evolution of deglaciated areas, and a better evaluation of the risk of glacial lakes outburst floods (GLOFS). In this work, we use 26 annual Landsat Thematic Mapper images from 1975 to 2010 to determine changes of the glaciated surface, snow line elevation and lakes formation in the headwaters of the Querecocha watershed in Cordillera Blanca (Perú). We also present the information derived from 10 short sediment cores (up to 50 cm long) retrieved along several transects in Yanamarey Lake. Both data sets inform of the sediment yield and lake development in recently deglaciated environments of the Andes. Results demonstrate that only one third of the surface covered by ice in 1975 remained in 2010. In this period, snowline has shifted up more than 100 meters in elevation in both, Yanamarey North and South areas respectively. At the same time, new lakes have been formed very quickly in these deglaciated areas. Preliminary 137Cs dating of Yanamarey sediment core indicates that at least the top 50 cm of the lake sequence deposited after 1960. This is coherent with the Landsat image of 1975 that showed the current surface of the lake still covered by ice. The high sediment rate (> 1 cm/yr) in the lake demonstrates the very high sediment yield in these geomorphically active settings. The sediment cores are composed of cm-thick sequences defined by grain-size (silt-clay) common in proglacial lakes reflecting the variability of hydrological response associated to the glacier retreat in the
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Ivonne Barragán
2015-12-01
Full Text Available The last military dictatorship in Argentina (1976-1983, based on the “National Security Doctrine”, developed technologies and repressive ways against its citizens. Repression, based on state terror, was territorially organized by the Argentine Army, which was responsible for a national operational coordination and the construction of a tripartite scheme of power. This article explores Argentina Navy’s action and the configuration actions and repressive practices from a case of regional perspective. Our interest is to discuss those processes in place long-term repression of the Navy in bounded contexts, the towns of Bahía Blanca and Ensenada, and its projections in the democratic era. We are interested in solving, in which ways the Argentina Navy exerted its repressive action on a particular civil sector were what as was the workers?
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International Nuclear Information System (INIS)
Proctor, A.E.; Hendricks, T.J.
1995-08-01
An aerial radiological survey was conducted of major sections of the Tonopah Test Range (TTR) in central Nevada from August through October 1993. The survey consisted of aerial measurements of both natural and man-made gamma radiation emanating from the terrestrial surface. The initial purpose of the survey was to locate depleted uranium (detecting 238 U) from projectiles which had impacted on the TTR. The examination of areas near Cactus Springs Ranch (located near the western boundary of the TTR) and an animal burial area near the Double Track site were secondary objectives. When more widespread than expected 241 Am contamination was found around the Clean Slates sites, the survey was expanded to cover the area surrounding the Clean Slates and also the Double Track site. Results are reported as radiation isopleths superimposed on aerial photographs of the area
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Directory of Open Access Journals (Sweden)
Oscar Andrés Ruiz Suescún
2005-06-01
Full Text Available En bosques montanos naturales de roble (Quercus humboldtii Bonpl. y plantados de pino pátula (Pinus patula Schltdl. & Cham. y ciprés (Cupressus lusitanica Mill. de la región de Piedras Blancas, Antioquia (Colombia, fueron medidos los flujos de escorrentía superficial (ES por un periodo de tiempo de 16 meses. Se implementaron parcelas cerradas de escorrentía superficial de 10 m de largo x 2 m de ancho, tanques colectores y sistemas de registro volumétrico. Los flujos fueron de 23,19 mm año-1 (1,07 % de la precipitación para la cobertura de roble; 35,13 mm año-1 (1,61 % de la precipitación para la cobertura de pino pátula y 230,64 mm año-1 (11,05 % de la precipitación para la cobertura de ciprés. Mediante análisis de componentes principales (ACP se identificaron las relaciones existentes entre las variables hidrológicas y los flujos de ES, y por medio de análisis de regresión lineal múltiple se ajustaron modelos para los flujos de ES por cobertura en función de la precipitación, la precipitación en el bosque y la intensidad de lluvia promedio, variables que mostraron alta relación con la ES según el ACP.In natural montane oak forests (Quercus humboldtii Bonpl., in pine (Pinus patula Schltdl. & Cham. and cypress (Cupressus lusitanica Mill. plantations in Piedras Blancas, Antioquia (Colombia, surface runoff flows (SRF were measured over 16 months. Runoff was measured using 10 m long x 2 m wide runoff bounded plots, collector tanks and a volumetric counter system. SRF were 23,19 mm year -1 (1,07 % of rainfall for oak forest; 35,13 mm year -1 (1,61 % of rainfall for pine and 230,64 mm year-1 (11,05 % of rainfall for cypress plantations. Relationships between hydrological variables and SRF were identified by a principal components analysis (PCA. For each one of the stands, multiple regression analysis was used to fit models of SRF on rainfall, throughfall and mean intensity of rainfall, variables that, according to the PCA
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Sarango Zurita, Karina Magdalena; Taipicaña Vergara, Erika Andrea
2013-01-01
Esta investigación se realizó en la Empresa Electrolux C.A., se dedica a la comercialización de electrodomésticos de línea blanca y enseres menores, el cual consiste en el desarrollo de un plan de mejoramiento enfocado en el área comercial, sobre la cual radican los principales problemas. El objetivo principal de este proyecto radica en levantar los procesos y a su vez plantear un mejoramiento en cuanto a costo – tiempo cada una de las actividades desarrolladas en dicha área, proponiendo l...
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Virginia Dominella
2015-12-01
Full Text Available El artículo reconstruye las relaciones entre personas y grupos del catolicismo liberacionista en Bahía Blanca (Argentina, entre 1968 y 1975. Describe los espacios de sociabilidad ligados a la renovación eclesial, así como las redes sociales que estos articularon. Analiza los modos en que esos vínculos actuaron en la generación de iniciativas comunes y en la participación de los actores en diversos ámbitos de acción social y política con el fin de aportar a la transformación de la sociedad en un contexto histórico marcado por la efervescencia social y política. Para este abordaje, se ha optado por una metodología cualitativa y, en este sentido, por la utilización de diversas estrategias, desde entrevistas en profundidad hasta el análisis de distintas fuentes empíricas (que incluyen testimonios éditos, prensa, informes de inteligencia y volantes, apelando a estrategias de triangulación para lograr una comprensión en profundidad del problema en cuestión.
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O. Wigmore
2017-11-01
Full Text Available The glaciers of the Cordillera Blanca, Peru, are rapidly retreating and thinning as a result of climate change, altering the timing, quantity and quality of water available to downstream users. Furthermore, increases in the number and size of proglacial lakes associated with these melting glaciers is increasing potential exposure to glacier lake outburst floods (GLOFs. Understanding how these glaciers are changing and their connection to proglacial lake systems is thus of critical importance. Most satellite data are too coarse for studying small mountain glaciers and are often affected by cloud cover, while traditional airborne photogrammetry and lidar are costly. Recent developments have made unmanned aerial vehicles (UAVs a viable and potentially transformative method for studying glacier change at high spatial resolution, on demand and at relatively low cost.Using a custom designed hexacopter built for high-altitude (4000–6000 m a. s. l. operation, we completed repeat aerial surveys (2014 and 2015 of the debris-covered Llaca Glacier tongue and proglacial lake system. High-resolution orthomosaics (5 cm and digital elevation models (DEMs (10 cm were produced and their accuracy assessed. Analysis of these datasets reveals highly heterogeneous patterns of glacier change. The most rapid areas of ice loss were associated with exposed ice cliffs and meltwater ponds on the glacier surface. Considerable subsidence and low surface velocities were also measured on the sediments within the pro-glacial lake, indicating the presence of extensive regions of buried ice and continued connection to the glacier tongue. Only limited horizontal retreat of the glacier tongue was observed, indicating that measurements of changes in aerial extent alone are inadequate for monitoring changes in glacier ice quantity.
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Laines Canepa, José Ramón; Zequeira Larios, Carolina; Valadez Treviño, Maria Elena Macías; Garduza Sánchez, Diana Ivett
2012-03-01
State parks are highly sensitive areas of great natural importance and tourism value. Herein a case study involving a basic survey of solid waste which was carried out in 2006 in Agua Blanca State Park, Macuspana, Tabasco, Mexico with two sampling periods representing the high and low tourist season is presented. The survey had five objectives: to find out the number of visitors in the different seasons, to consider the daily generation of solid waste from tourist activities, to determine bulk density, to select and quantify sub-products; and to suggest a possible treatment. A daily average of 368 people visited the park: 18,862 people in 14 days during the high season holiday (in just one day, Easter Sunday, up to 4425 visitors) and 2092 visitors in 43 days during the low season. The average weight of the generated solid waste was 61.267 kg day(-1) and the generated solid waste average per person was 0.155 kg person(-1 ) day(-1). During the high season, the average increased to 0.188 kg person(-1 ) day(-1) and during the low season, the average decreased to 0.144 kg person(-1 ) day(-1). The bulk density average was 75.014 kg m(-3), the maximum value was 92.472 kg m(-3) and the minimum was 68.274 kg m(-3). The sub-products comprised 54.52% inorganic matter; 32.03% organic matter, 10.60% non-recyclable and 2.85% others. Based on these results, waste management strategies such as reuse/recycling, aerobic and anaerobic digestion, the construction of a manual landfill and the employment of a specialist firm were suggested.
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Hellstrom, R. A.; Fernandez, A.; Mark, B. G.; Covert, J. M.
2015-12-01
Northern Peru will face critical water resource issues in the near future as permanent ice retreats. Much of current global and regional climate research neglects the meteorological forcing of lapse rates and valley wind dynamics on critical components of the Peruvian Andes' water-cycle. In 2004 and 2005 we installed an autonomous sensor network (ASN) within the glacierized Llanganuco Valley, Cordillera Blanca (9°S), consisting of discrete, cost-effective, automatic temperature loggers located along the valley axis and anchored by two automatic weather stations. Comparisons of these embedded atmospheric measurements from the ASN and climate modeling (CM) by dynamical downscaling using the Weather Research and Forecasting (WRF) model elucidate distinct diurnal and seasonal characteristics of the mountain valley winds and lapse rates. Wind, temperature, humidity, and cloud simulations by WRF suggest that thermally driven valley winds converging with easterly flow aloft enhance late afternoon and evening cloud development which helps explain detected nocturnal precipitation maxima measured by the ASN. We attribute sustained evapotranspiration (ET), as estimated by the FAO-56 Penman-Monteith model, to an abundance of glacial melt-water during the dry season and strong pre-noon solar heating during the wet season. Furthermore, the extreme diurnal variability of along-valley-axis lapse rates and valley wind detected from ground observations and confirmed by dynamical downscaling demonstrate the importance of realistic scale parameterizations of the boundary layer to improve regional CM projections in mountainous regions. Our findings portray ET as an integral yet poorly represented process in Andean hydroclimatology. We show that coupling ASN and CM can improve understanding of multi-scale atmospheric and associated hydrological processes in mountain valleys.
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Gallego-Calvo, L; Gatica, M C; Guzmán, J L; Zarazaga, L A
2014-12-30
The reproductive activity of 84 female Blanca Andaluza goats was monitored over 17 months to determine the role of body condition score (BCS) and body weight (BW) in its control. Following a 3×2 factorial experimental design, the animals were allocated to three groups: low BCS (≤2.50, n=24), medium BCS (BCS=2.75-3.00, n=31) and high BCS (≥3.25, n=29). The same animals, irrespective of the BCS group categorization, were also divided into two groups depending on BW: low BW (≤40kg, n=44) and high BW (>40kg, n=40). Oestrus was evaluated daily using vasectomised males. The ovulation rate was assessed by trans-rectal ultrasonography after the identification of oestrus. Ovulations were determined by monitoring the plasma progesterone concentration weekly. The BCS and BW were recorded once a week and nutritional status adjusted to maintain the initial differences in BW and BCS between the groups. Both BCS and BW had a significant (at least Preproductive activity recorded in does with a BCS of ≥2.75 and BW of >40kg. No significant interaction between these variables was observed. Some (11.7%) of the does in the groups with animals of BCS≥2.75 had ovulations during seasonal anoestrus. None of the does with a BCS of ≤2.5 had ovulations during seasonal anoestrus. The ovulation rate of the first and last oestrus was influenced by BW (Preproductive seasonality that is clearly and independently modulated by BCS and BW. Copyright © 2014 Elsevier B.V. All rights reserved.
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Directory of Open Access Journals (Sweden)
Juliana López Pascual
2016-01-01
Full Text Available For over a century the people of Bahia Blanca, Argentinian port city located at the south west of the province of Buenos Aires, they have imagined it and defined it not only as part of the Patagonian territories but also as their legitimate political, economic and cultural center. The aim of historicizing and questioning this idea, trying to account for the interests that were mobilized, the ideological postures that hinted, and the impact it had on the effective regional layout, is what motivates our research. To that end, this article does focus on economic and infrastructural dimension that some debates of mid-twentieth century used simultaneously as evidence and as ultimate goal of this alleged hegemony. For this purpose, we will analyze the writings of Domingo Pronsato and Ricardo M. Ortiz whom, from different geopolitical perspectives, devised specific roles for the city that suited their plans for the regional development of Patagonia.
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Energy Technology Data Exchange (ETDEWEB)
M. Fayek; P. Goodell; M. Ren; A. Simmons
2005-07-11
The Nopal I uranium (U) deposit, Pena Blanca District, Mexico, largely consists of secondary U{sup 6+} minerals, which occur within a breccia pipe mainly hosted by the 44 Ma Nopal and Colorados volcanic formations. These two units overly the Pozos conglomerate formation and Cretaceous limestone. Three new vertical diamond drill holes (DDHs) were recently drilled at Nopal I. DDH-PB1 with continuous core was drilled through the Nopal I deposit and two additional DDHs were drilled {approx}50 m on either side of the cored hole. These DDHs terminate 20 m below the current water table, thus allowing the detection of possible gradients in radionuclide contents resulting from transport from the overlying uranium deposit. Primary uraninite within the main ore body is rare and fine-grained ({approx}50 micrometers), thus making geochronology of the Nopal I deposit very difficult. Uranium, lead and oxygen isotopes can be used to study fluid-uraninite interaction, provided that the analyses are obtained on the micro-scale. Secondary ionization mass spectrometry (SIMS) permits in situ measurement of isotopic ratios with a spatial resolution on the scale of a few {micro}m. Preliminary U-Pb results show that uraninite from the main ore body gives an age of 32 {+-} 8 Ma, whereas uraninite from the uraniferous Pozos conglomerate that lies nearly 100 m below the main ore body and 25 meters above the water table, gives a U-Pb age that is <1 Ma. Oxygen isotopic analyses show that uraninite from the ore body has a {delta}{sup 18}O = -10.8{per_thousand}, whereas the uraninite within the Pozos conglomerate has a {delta}{sup 18}O = +1.5{per_thousand}. If it is assumed that both uraninites precipitated from meteoric water ({delta}{sup 18}O = -7{per_thousand}), then calculated precipitation temperatures are 55 C for the uraninite from the ore body and 20 C for uraninite hosted by the Pozos conglomerate. These temperatures are consistent with previous studies that calculated precipitation
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International Nuclear Information System (INIS)
Fayek, M.; Goodell, P.; Ren, M.; Simmons, A.
2005-01-01
The Nopal I uranium (U) deposit, Pena Blanca District, Mexico, largely consists of secondary U 6+ minerals, which occur within a breccia pipe mainly hosted by the 44 Ma Nopal and Colorados volcanic formations. These two units overly the Pozos conglomerate formation and Cretaceous limestone. Three new vertical diamond drill holes (DDHs) were recently drilled at Nopal I. DDH-PB1 with continuous core was drilled through the Nopal I deposit and two additional DDHs were drilled ∼50 m on either side of the cored hole. These DDHs terminate 20 m below the current water table, thus allowing the detection of possible gradients in radionuclide contents resulting from transport from the overlying uranium deposit. Primary uraninite within the main ore body is rare and fine-grained (∼50 micrometers), thus making geochronology of the Nopal I deposit very difficult. Uranium, lead and oxygen isotopes can be used to study fluid-uraninite interaction, provided that the analyses are obtained on the micro-scale. Secondary ionization mass spectrometry (SIMS) permits in situ measurement of isotopic ratios with a spatial resolution on the scale of a few (micro)m. Preliminary U-Pb results show that uraninite from the main ore body gives an age of 32 ± 8 Ma, whereas uraninite from the uraniferous Pozos conglomerate that lies nearly 100 m below the main ore body and 25 meters above the water table, gives a U-Pb age that is 18 O = -10.8(per t housand), whereas the uraninite within the Pozos conglomerate has a (delta) 18 O = +1.5(per t housand). If it is assumed that both uraninites precipitated from meteoric water ((delta) 18 O = -7(per t housand)), then calculated precipitation temperatures are 55 C for the uraninite from the ore body and 20 C for uraninite hosted by the Pozos conglomerate. These temperatures are consistent with previous studies that calculated precipitation temperatures for clay minerals associated with uraninite
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Regina del Carmen Durán Durán
2009-01-01
Full Text Available Actualmente, se han empezado a considerar otras obligaciones que tienen las empresas para con su comunidad; se trata de aspectos vinculados con las dimensiones sociales y ambientales. Desde este contexto, nuestro trabajo tiene como punto de partida el concepto de responsabilidad social desde la noción de sustentabilidad. El objetivo es evaluar la forestación como instrumento para mejorar la sostenibilidad de los sistemas productivos tradicionales en tierras marginales del Partido de Bahía Blanca, mitigando los impactos del desarrollo no responsable de la producción primaria. Para ello, se han identificado técnicas de manejo generadoras de externalidades positivas en otras actividades agropecuarias complementarias, donde existen limitantes edafológicas, apoyándose en las tres dimensiones del concepto de sustentabilidad: ecológica, económica, sociopolítica y cultural. De igual forma, se diseñó una matriz de evaluación y ponderación de impactos, que contempla indicadores cuantitativos y cualitativos, de cuya aplicación surge la forestación como una alternativa sustentable
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Lucía Bracamonte
2012-01-01
Full Text Available El cuidado de los menores considerados en riesgo moral y material en la Argentina de principios del siglo XX queda muchas veces a cargo de instituciones de caridad en las cuales las benefactoras adquieren especial protagonismo. El objetivo del presente artículo es identificar las funciones asumidas por las mujeres en el periodo de surgimiento y afianzamiento del Patronato de la Infancia de Bahía Blanca, caracterizándolas en el marco de las relaciones que establecen con las personas que las rodean, así como de las representaciones de género emergentes de las mismas. Cabe preguntarse de qué manera se definen, a partir de las prácticas y los discursos vinculados con el caso analizado, los lugares ocupados por las benefactoras en relación a los hombres de su círculo social y a otras mujeres de distintos estratos y ocupaciones que se involucran con la institución, como las amas de leche y las religiosas. Se plantea que la actuación de las propulsoras de este emprendimiento representa en muchos sentidos una transgresión a los modelos imperantes de femineidad pero que, sin embargo, tanto los discursos de los hombres como los de las mujeres asocian sus actividades con esos presupuestos dominantes.
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Gustavo G. Gonsebatt
2012-06-01
Full Text Available Whiteflies of economic importance are polyphagous, being able to develop on a large number of cultivated and spontaneous plants. We recorded the whitefly species on vegetable and flower crops and the wild plants associated, under greenhouse and field conditions, for two years. We observed two species: Trialeurodes vaporariorum (Westwood and the Bemisia tabaci complex (Gennadius. T vaporariorum was recorded on 24 plant species (11 families, 12 and 8 of which are new hosts in Argentina and in the world, respectively. The B. tabaci complex was recorded only on flower production systems, on 19 plant species (11 families, 14 and 7 of which are new hosts in Argentina and in the world, respectively. The crops Glycine max (L. and Chrysanthemum morifolium Ramat., the wild species Amaranthus blitum L., Amaranthus quitensis Kunth, Conyza bonariensis (L., Galinsoga parviflora Cav., Sonchus oleraceus L. and Wedelia glauca (Ortega O. Hoffm. ex Hicken were hosts of both species. The only parasitoid recorded was Eretmocerus californicus near corni Haldeman (Hymenoptera: Aphelinidae from T. vaporariorum. This study, which is the first systematic survey of host plants in the region, intends to provide a better knowledge of the range of whiteflies host plants in Argentina.Las moscas blancas de importancia económica son polífagas y capaces de desarrollarse sobre numerosas plantas cultivadas y espontáneas. Registramos las especies de moscas blancas sobre cultivos hortícolas y de flores, y sobre las plantas silvestres asociadas. Observamos dos especies: Trialeurodes vaporariorum (Westwood y el complejo Bemisia tabaci (Gennadius. T. vaporariorum fue registrada sobre 24 especies de plantas (11 familias, 12 y 8 de las cuales son hospedantes nuevos para Argentina y a nivel mundial, respectivamente. El complejo B. tabaci fue registrado solo en sistemas de producción de flores, sobre 19 especies de plantas (11 familias, 14 y 7 de las cuales son nuevos hospedantes para
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International Nuclear Information System (INIS)
Ku, T.L.; Luo, S.; Goldstein, S.J.; Murrell, M.T.; Chu, W.L.; Dobson, P.F.
2009-01-01
Current models using U- and Th-series disequilibria to study radioisotope transport in groundwater systems mostly consider a steady-state situation. These models have limited applicability to the vadose zone (UZ) where the concentration and migratory behavior of radioisotopes in fluid are often transitory. We present here, as a first attempt of its kind, a model simulating the non-steady state, intermittent fluid transport in vadose layers. It provides quantitative constraints on in-situ migration of dissolved and colloidal radioisotopes in terms of retardation factor and rock-water interaction (or water transit) time. For uranium, the simulation predicts that intermittent flushing in the UZ leads to a linear relationship between reciprocal U concentration and 234 U/ 238 U ratio in percolating waters, with the intercept and slope bearing information on the rates of dissolution and α-recoil of U isotopes, respectively. The general validity of the model appears to be borne out by the measurement of uranium isotopes in UZ waters collected at various times over a period during 1995-2006 from a site in the Pena Blanca mining district, Mexico, where the Nopal I uranium deposit is located. Enhanced 234 U/ 238 U ratios in vadose-zone waters resulting from lengthened non-flushing time as prescribed by the model provide an interpretative basis for using 234 U/ 238 U in cave calcites to reconstruct the regional changes in hydrology and climate. We also provide a theoretical account of the model's potential applications using radium isotopes.
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Toro-Farmer, Gerardo; Cantera, Jaime R; Londoño-Cruz, Edgardo; Orozco, Carlos; Neira, Raul
2004-03-01
Regular sea-urchins are one of the main bioeroding organisms affecting coral reefs around the world. The abundance, distribution and bioerosion rate of the sea-urchin Centrostephanus coronatus, were determined in different reef zones of Playa Blanca fringing reef (Gorgona Island, Colombian pacific coast) during 1997 and 1998. The erosion rates were determined calcinating the gut content of the sea-urchins to eliminate all organic components and preserve the inorganic portion of calcium carbonate. C. coronatus showed the highest densities towards the central zones of the reef (plain-crest and front) (12.4 ind/m2; range 0-48 ind/m2). The highest mean bioerosion rate was 0.103 kgCaCO3/m2/yr in the reef plain-crest (0-0.69 kgCaCO3/m2/yr). In the other zones, (back reef and reef front) the mean bioerosion rates were 0.071 (range 0-0.39) and 0.052 (range 0-0.31) kgCaCO3/m2/yr respectively. According to the present data, it can be seen that the destruction of coralline skeletons, produced in this reef by sea-urchins is rather low, compared with the abrasion caused by these organisms in other places of the world. However, the combined action of C. coronatus and other bioeroding organisms (borers and grazers). along with some adverse environmental factors to corals, can be causing a negative balance between normal processes of reef accretion-destruction in Gorgona Island reefs.
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Kim, Richard; Halstead, Brian J.; Wylie, Glenn D.; Casazza, Michael L.
2018-04-26
San Francisco gartersnakes (Thamnophis sirtalis tetrataenia) are a subspecies of common gartersnakes endemic to the San Francisco Peninsula of northern California. Because of habitat loss and collection for the pet trade, San Francisco gartersnakes were listed as endangered under the precursor to the Federal Endangered Species Act. A population of San Francisco gartersnakes resides at Mindego Ranch, San Mateo County, which is part of the Russian Ridge Open Space Preserve owned and managed by the Midpeninsula Regional Open Space District (MROSD). Because the site contained non-native fishes and American bullfrogs (Lithobates catesbeianus), MROSD implemented management to eliminate or reduce the abundance of these non-native species in 2014. We monitored the population using capture-mark-recapture techniques to document changes in the population during and following management actions. Although drought confounded some aspects of inference about the effects of management, prey and San Francisco gartersnake populations generally increased following draining of Aquatic Feature 3. Continued management of the site to keep invasive aquatic predators from recolonizing or increasing in abundance, as well as vegetation management that promotes heterogeneous grassland/shrubland near wetlands, likely would benefit this population of San Francisco gartersnakes.
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Orhan, Hükmü
1992-04-01
The importance of dust storms on geological processes has only been studied recently. Case-hardening, desert-varnish formation, duricrust development, reddening and cementation of sediments and caliche formation, are some important geological processes related to dust storms. Dust storms can also be a major source for cements in aeolian sandstones. The Jurassic aeolian Entrada Formation in the Ghost Ranch area is composed of quartz with minor amounts of feldspar and rock fragments, and is cemented with smectite as grain coatings and calcite and kaolinite as pore fillings. Smectite shows a crinkly and honeycomb-like morphology which points to an authigenic origin. The absence of smectite as framework grains and the presence of partially dissolved grains, coated with smectite and smectite egg-shells, indicate an external source. Clay and fine silt-size particles are believed to be the major source for cements, smectite and calcite in the Entrada Formation. The common association of kaolinite with altered feldspar, and the absence of kaolinite in spots heavily cemented with calcite, lead to the conclusions that the kaolinite formation postdates carbonates and that framework feldspar grains were the source of kaolinite.
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Directory of Open Access Journals (Sweden)
María de los Ángeles Tepox Pérez
2012-01-01
Full Text Available Con el objeto de evaluar el comportamiento productivo de la gallina Bovans blanca de primer ciclo alimentadas con dietas con niveles diferentes de energía metabolizable (EM y de metionina+cistina digestible (AAD, para lograr disminuir el porcentaje de huevo pequeño (<42 g, al inicio de la producción se utilizaron 384 gallinas de 19 semanas de edad. Se usó un diseño completamente al azar, en un arreglo factorial de 4 X 2, donde el primer factor fueron los niveles de EM (2700, 2800, 2900, 3000 Kcal/kg y el segundo factor fue la inclusión de diferentes porcentajes de AAD (0.45, 0.61. Cada tratamiento, contó con cuatro repeticiones de 12 gallinas cada uno. Durante ocho semanas se llevaron registros semanales, del porcentaje de postura, peso promedio del huevo, consumo de alimento; masa de huevo/ave/día y conversión alimenticia; además, se clasificó el huevo de acuerdo al peso. Los resultados obtenidos, no mostraron respuesta a los factores de estudio ni a la interacción entre nivel de EM y AAD, para ninguna de las variables productivas. Se encontró un efecto sobre el consumo de alimento del nivel de energía y aminoácidos azufrados (P<0.05. Se disminuyó el porcentaje de huevo pequeño en los niveles más altos de EM de 2900 y 3000 Kcal/Kg (29.6 y 30.4 % respectivamente. Se incrementó (P<0.05 el porcentaje de huevo grande en 3 % al usar dietas con el nivel de AAD de 0.61 %.
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Directory of Open Access Journals (Sweden)
Cristiane Souza Gonçalves
2007-06-01
Full Text Available Among the pioneer examples of architectural heritage preservation works, the restoration of the Santo Antônio ranch and chapel, in São Roque, represents a significant case of the activities held by architect Luis Saia, while leading the São Paulo´s regional office of the federal organ then called National Historical and Artistic Heritage Service (Sphan in portuguese, from 1945 to 1975. The architectural set, which consisted of a 17th century house and chapel and the ruins of a 19th century building, was an impressive discovery which delighted Mario de Andrade by the end of the 1930´s. However its poor conservation condition demanded urgent repair to restore its physical integrity. It presented, then, to the architects of Sphan a bigger and more complex restoration and conservation challenge whose phases and results will be subject of analysis in the present article.
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Fernando Urrea Giraldo
Full Text Available Este articulo analiza la producción de determinadas feminidades en el suroeste colombiano actual, a través de las tensiones entre placer y afecto reveladas por las biografías sexuales de 18 mujeres negras y blancas-mestizas, de diferentes clases sociales, color de piel, orientación sexual, generación, edad, estado civil y prole. A través de la construcción de cuatro tipologías, se aborda el papel creciente del placer en la conformación social de las subjetividades contemporáneas. Parte de los resultados son debatidos a partir de la perspectiva foucaultiana, el feminismo radical, la teoría queer, y el psicoanálisis lacaniano, con aportes de la sociología y el feminismo afroamericano. El presente texto se inscribe en la teoría feminista de la interseccionalidad, y plantea especialmente el papel de la racialización en la vivencia de la sexualidad de las mujeres negras entrevistadas, mediante la articulación de las dimensiones sexual y racial.
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Claudia Avelina Sereno
2016-08-01
Because of their boundary condition, rururban areas are subject to mobile and changing phenomena. Said phenomena are caused by the pressure exerted by real estate agents, urban planning policies, and economic sectors agents such as industries or other businesses interested in these types of zones. Rururban areas are also under the influence of economic globalization, productive restructuring, and technological innovations. These last ones stablish a rupture in the, so far, predominant spatial logic by causing changes in the territories’ dynamic. The objective of this article is to analyze Bahia Blanca City’s rururban as a zone where socio-spatial conflicts are generated. Specially, conflicts related to the advance of urbanization over the city’s boundaries and also those that are a consequence of the global logic impact. The main interest is to identify and observe the ways in which residents perceive and experience these missed encounters. To do so, a qualitative methodology is used. This methodology was chosen because it takes into account the observation of the territory and the implementation of semi-structured interviews to the residents of the Bahia Blanca’s rururban. Keywords: Rururban Area; Socio-spatial Conflicts; Experience; Perception.
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Wilson, J.; Wetmore, P. H.; Malservisi, R.; Ferwerda, B. P.; Teran, O.
2012-12-01
We use recently collected slip vector and total offset data from the Agua Blanca fault (ABF) to constrain a pixel translation digital elevation model (DEM) to reconstruct the slip history of this fault. This model was constructed using a Perl script that reads a DEM file (Easting, Northing, Elevation) and a configuration file with coordinates that define the boundary of each fault segment. A pixel translation vector is defined as a magnitude of lateral offset in an azimuthal direction. The program translates pixels north of the fault and prints their pre-faulting position to a new DEM file that can be gridded and displayed. This analysis, where multiple DEMs are created with different translation vectors, allows us to identify areas of transtension or transpression while seeing the topographic expression in these areas. The benefit of this technique, in contrast to a simple block model, is that the DEM gives us a valuable graphic which can be used to pose new research questions. We have found that many topographic features correlate across the fault, i.e. valleys and ridges, which likely have implications for the age of the ABF, long term landscape evolution rates, and potentially provide conformation for total slip assessments The ABF of northern Baja California, Mexico is an active, dextral strike slip fault that transfers Pacific-North American plate boundary strain out of the Gulf of California and around the "Big Bend" of the San Andreas Fault. Total displacement on the ABF in the central and eastern parts of the fault is 10 +/- 2 km based on offset Early-Cretaceous features such as terrane boundaries and intrusive bodies (plutons and dike swarms). Where the fault bifurcates to the west, the northern strand (northern Agua Blanca fault or NABF) is constrained to 7 +/- 1 km. We have not yet identified piercing points on the southern strand, the Santo Tomas fault (STF), but displacement is inferred to be ~4 km assuming that the sum of slip on the NABF and STF is
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Graciela Hernández
2010-10-01
Full Text Available Proponemos conocer el origen e ir identificando los sentidos de una de las manifestaciones de la religiosidad popular que se producen en Bahía Blanca: las festividades en honor a la Virgende Urkupiña. Es una devoción mariana surgida en Bolivia y profesada por migrantes bolivianos y de las provincias del noroeste argentino, como jujeños, salteños y tucumanosradicados en esta ciudad y la zona de influencia.Se trata de una investigación realizada con metodología cualitativa etnográfica. Del trabajo de campo hemos seleccionados relatos de vida que nos resultan significativos en tanto encontramos en ellos las explicaciones que los sujetos entrevistados dan de los procesos sociales. El relato de vida es el fragmento del texto oral que da cuenta de aquellos temas que nos hemos propuesto conocer.Realizamos un breve recorrido por la bibliografía de la última década que toma el tema la fiesta de la Virgen de Urkupiña en distintos lugares del país. Hemos visto que cada uno de los autores focaliza en distintos aspectos de la festividad o en las distintas perspectivas teóricas;nosotros queremos aportar nuevas explicaciones sobre el origen de estas celebraciones y rituales a partir de la interpretación de los relatos de vida seleccionados
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Rosa María Añón Abajas
2015-05-01
Full Text Available RESUMEN La expansión económica de España en la década de los 60 del pasado siglo XX, se relaciona directamente con el acceso mayoritario de la clase media a las vacaciones estivales y con la explosión del turismo de costa. Entre la multitud de promociones que empezaron a transformar el litoral mediterráneo, Ciudad Blanca proyectada por Sáenz de Oíza en la Bahía de Alcudia, aunque no concluida por completo, ejemplifica cómo un encargo especulativo para acoger a una gran masa de veraneantes, puede aprovechar la euforia del momento, ensayando un modelo residencial ideal, en un contexto próximo a los debates de arquitectura que se estaban dando en el resto de Europa, abordados por los arquitectos de la “Tercera Generación”, que pretendían la superación de los dogmatismos del Movimiento Moderno. La lección que el Oíza profesor nos lega a través de esta experiencia, aparte del modo de proceder, enfrentándose con cierta dosis experimental cual alumno afrontando un ejercicio académico innovador, reside en el valor didáctico de mostrar mediante una serie de mecanismos proyectuales, la vital atención prestada al paisaje y al habitante, a la exterioridad y a la interioridad de la obra, desarrollando una empatía entre el lugar y el momento, que generó un mestizaje interesante entre nuevos conceptos de agrupación, ejecutados con sistemas estructurales racionalistas en los que se introducen elementos puntuales prefabricados, combinando tradición y novedad.
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Miguel Muñoz
2004-09-01
Full Text Available The non-structural NS3 protein gene from the rice hoja blanca virus (RHBV was fused to the glutathione- S-transferase carboxilic end and expressed in Escherichia coli strain JM83. Large quantities of fusion protein were produced in insoluble form. The fusion protein was fractionated in SDS-PAGE and purified by electroelution, polyclonal antibodies were raised in rabbit and the antiserum was absorbed with bacterial crude extract. A band of similar size as that of NS3 protein was observed in Western blots using extracts from RHBV-infected rice plants. Immunoelectron microscopy with colloidal gold-labeled antibodies against NS3 protein and the viral nucleocapsid protein revealed in situ accumulation of NS3 protein in the cytoplasm but not in the viral inclusion bodies, vacuoles or chloroplasts of RHBV-infected plants, following the same pattern of distribution as the RHBV nucleocapsid protein. Rev. Biol. Trop. 52(3: 765-775. Epub 2004 Dic 15.El gen que codifica por la proteína no estructural NS3 del virus de la hoja blanca de arroz (RHBV se fusionó al extremo carboxilo del gen de la glutationa-S-transferasa y se expresó en la cepa JM83 de Escherichia coli. Se obtuvieron altas concentraciones de la proteína de fusion (GST-NS3 en forma insoluble. La proteína de fusión se fraccionó en geles de SDS-PAGE, se purificó por electroelución, y se utilizó para producir anticuerpos policlonales en conejo . El antisuero producido se absorbió con extractos crudos de E. coli. Extractos crudos de plantas de arroz sanas e infectadas con el RHBV se evaluaron por Western blots detectándose una banda de peso molecular similar al estimado para la proteína NS3 (23KDa en las plantas infectadas con el virus. Los tejidos provenientes de plantas infectadas con el RHBV se analizaron por medio de microscopia inmunoelectrónica con oro colloidal marcado con anticuerpos contra la proteína NS3 y la nucleoproteína viral N. Se observó una acumulación in situ de la
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Romina Valeria Schroeder
2011-11-01
Full Text Available Muchas de las políticas urbanas han incorporado, recientemente, una posición proactiva hacia el turismo y la actividad recreativa, que se ve cada vez más como un sector estratégico para la revitalización urbana en determinados sectores de la ciudad. El presente artículo propone una reflexión acerca de la incidencia de la actividad turístico-recreativa en espacios urbanos, como inductora de un proceso de desarrollo local. Se plantea como caso de estudio Bahía Blanca (Provincia de Buenos Aires, Argentina, centro urbano intermedio con preponderancia regional, que procura insertarse entre las ciudades que se orientan a promover actividades propias del turismo y la recreación. Varias son las acciones realizadas en este sentido, poniendo de relieve, por un lado, los diferentes proyectos y planes urbanos que se desarrollaron y, por el otro, los cambios sociales y la renovación urbana que impulsaron. Si bien el estudio de esta temática se encuentra en su etapa inicial1, el trabajo plantea interrogantes acerca de las transformaciones urbanas actuales y cómo éstas se vinculan a la dinamización de un territorio, a partir de la actividad turístico-recreativa.
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Geologic studies in the Sierra de Pena Blanca, Chihuahua, Mexico
Reyes-Cortes, Ignacio Alfonso
The Sierra del Cuervo has been endowed with uranium mineralization, which has attracted many geological studies, and recently the author was part of a team with the goal of selecting a site of a radioactive waste repository. The first part of the work adds to the regional framework of stratigraphy and tectonics of the area. It includes the idea of a pull apart basin development, which justifies the local great thickness of the Cuervo Formation. It includes the regional structural frame work and the composite stratigraphic column of the Chihuahua Trough and the equivalent Cretaceous Mexican Sea. The general geologic features of the NE part of the Sierra del Cuervo are described, which include the folded ignimbrites and limestones in that area; the irregular large thicknesses of the Cuervo Formation; and the western vergence of the main folding within the area. Sanidine phenocrystals gave ages of 54.2 Ma and 51.8 Ma ± 2.3 Ma. This is the first time these dates have been reported in print. This age indicates a time before the folded structures which outcrop in the area, and 44 Ma is a date after the Cuervo Formation was folded. The Hidalgoan orogeny cycle affected the rocks between this lapse of time. Since then the area has been partially affected by three tensional overlapped stages, which resulted in the actual Basin and Range physiography. The jarosite related to the tectonic activity mineralization has been dated by the Ar-Ar method and yields an age of 9.8 Ma. This is the first report of a date of mineralization timing at Pena Blanca Uranium District in the Sierra del Cuervo. These are some of the frame work features that justify the allocation of a radioactive waste repository in the Sierra del Cuervo. An alluvial fan system within the Boquilla Colorada microbasin was selected as the best target for more detailed site assessment. The study also included the measurement of the alluvium thicknesses by geoelectric soundings; studies of petrography and weathered
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Energy Technology Data Exchange (ETDEWEB)
Ku, T. L.; Luo, S.; Goldstein, S. J.; Murrell, M. T.; Chu, W. L.; Dobson, P. F.
2009-06-01
Current models using U- and Th-series disequilibria to study radioisotope transport in groundwater systems mostly consider a steady-state situation. These models have limited applicability to the vadose zone (UZ) where the concentration and migratory behavior of radioisotopes in fluid are often transitory. We present here, as a first attempt of its kind, a model simulating the non-steady state, intermittent fluid transport in vadose layers. It provides quantitative constraints on in-situ migration of dissolved and colloidal radioisotopes in terms of retardation factor and rock-water interaction (or water transit) time. For uranium, the simulation predicts that intermittent flushing in the UZ leads to a linear relationship between reciprocal U concentration and {sup 234}U/{sup 238}U ratio in percolating waters, with the intercept and slope bearing information on the rates of dissolution and {alpha}-recoil of U isotopes, respectively. The general validity of the model appears to be borne out by the measurement of uranium isotopes in UZ waters collected at various times over a period during 1995-2006 from a site in the Pena Blanca mining district, Mexico, where the Nopal I uranium deposit is located. Enhanced {sup 234}U/{sup 238}U ratios in vadose-zone waters resulting from lengthened non-flushing time as prescribed by the model provide an interpretative basis for using {sup 234}U/{sup 238}U in cave calcites to reconstruct the regional changes in hydrology and climate. We also provide a theoretical account of the model's potential applications using radium isotopes.
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A comparison of the effects of different rangeland management ...
African Journals Online (AJOL)
A comparison of the effects of different rangeland management systems on ... Three management systems exploit these areas: commercial livestock ranching, communal livestock ranching and game ranching. ... AJOL African Journals Online.
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Directory of Open Access Journals (Sweden)
Mauricio Duarte
2011-01-01
Full Text Available This article examines the relationship between poetic writing and the discourse of landscape in Madera Viva y árbol difunto (1982 by Blanca Wiethüchter (1947-2004. Landscape is often understood as a modern device of normative representation in which people and places are classified merely as private property. I argue that Wiethüchter’s poetry establishes a counter-narrative of the landscape through the use of a poetic gaze that reinstates social and marginal imaginaries by recognizing the materiality of such landscape and, most importantly, the political role of imagination in shaping the sense of the real. In doing so, I show how Wiethüchter uses poetic language to claim multiple and conflictive realities that lie beneath the names and harmonic appearances of things. Finally, by analyzing Wiethüchter’ poetic and critical work in dialogue with thinkers and scholars such as García Linera, Mamani, Zavaleta Mercado, and Rivera Cusicanqui, this article contributes to the understanding of the politics of representation during the 1980s in Bolivia.ResumenEste artículo examina la relación entre la escritura poética y el discurso del paisaje en Madera Viva y árbol difunto (1982 de Blanca Wiethüchter (1947-2004. A menudo el paisaje es entendido como un mecanismo moderno de representación normativa en la cual los sujetos y los lugares son clasificados simplemente como propiedad privada. Nuestro argumento propone que la poesía de Wiethüchter establece una contra-narrativa del paisaje a través del uso de una mirada poética que reinstala imaginarios sociales y marginales al reconocer la materialidad del paisaje y, más aún, el rol político de la imaginación en la configuración del sentido de realidad. Al proponer lo anterior, se muestra cómo Wiethüchter usa el lenguage poético para reclamar realidades múltiples y conflictivas anquilosadas bajo la armónica apariencia de las cosas. Finalmente, al analizar la obra poética y cr
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Evolución de estrellas enanas blancas de Helio de masa baja e intermedia
Althaus, L. G.; Benvenuto, O. G.
Numerosas observaciones realizadas particularmente en los últimos dos años parecen confirmar que las enanas blancas (EB) de helio de masa baja e intermedia son el resultado de la evolución de sistemas binarios cercanos. Con el objeto de realizar una adecuada interpretación de estos objetos son necesarios modelos de EBs de helio lo más detallado posibles. En este estudio presentamos cálculos detallados de la evolución de EBs de helio con masas entre M=0.1Msolar y M=0.5Msolar a intervalos de 0.05Msolar . Para ello, hemos tenido en cuenta los efectos de temperatura finita mediante un código de evolución estelar lo más actualizado posible. En particular, el transporte de energía es descripto en el marco del nuevo modelo para la convección turbulenta desarrollado por Canuto - Mazzitelli. Además hemos considerado la nueva ecuación de estado para plasmas de helio de Saumon et al. y nuevas opacidades radiativas OPAL. Las pérdidas por neutrinos fueron asimismo tenidas en cuenta. Excepto para las EBs más masivas, nuestros modelos iniciales están ubicados en las cercanías de la correspondiente línea de Hayashi para configuraciones de helio. Nuestros resultados muestran que existe una región prohibida en el diagrama observacional HR donde ninguna EB de helio puede encontrarse. Dicha región es para log{(L/Lsolar )}>= -0.25 and log{Teff} >= 4.45. Hemos encontrado también que los tracks evolutivos en el diagrama HR en el dominio de alta luminosidad (pre - EB) son fuertemente afectados por la eficiencia convectiva y que las pérdidas por neutrinos son importantes en los modelos más masivos. Finalmente hemos analizado la estructura de la zona convectiva externa encontrando que la teoría de Canuto - Mazzitelli conduce a un perfil convectivo muy diferente del dado por cualquier versión de la popular teoría de la mixing length. Si bién este comportamiento es decisivo en el contexto de las inestabilides pulsacionales, los radios y gravedades superficiales de
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Edgar O'Hara
1993-09-01
Full Text Available Llanto de la espada. Eduardo García Aguilar. Universidad Nacional Autónoma de México, México, 1992. 16 textos / Falso diario. Santiago Mutis Durán. Universidad del Valle, Colección "La Cierva Blanca", Cali, 1993, 72 págs. En alabanza del tiempo. Álvaro Rodríguez Torres. Universidad del Valle, Colección "La Cierva Blanca", Cali, 1993, 51 págs. El rey de los espantos. Víctor Manuel Gaviria. Universidad del Valle, Colección "La Cierva Blanca", Cali, 1993, 69 págs. La luna del dragón. William Ospina. Universidad del Valle, Colección "La Cierva Blanca" , Cali, 1993, 107 págs. En la posada del mundo. Fernando Herrera Gómez. Universidad del Valle, Colección "La Cierva Blanca", Cali, 1993, 81 págs. Piezas para la mano izquierda. Jaime Alberto Vélez. Universidad de Antioquia, Medellín, 1992.
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R. Collazo-Carceller
2009-05-01
Full Text Available Se determina la influencia de los parámetros Energía introducida (Hi, Número de capas (Nc y Ancho del depósito (Ad, en la morfología y el incremento de la resistencia al desgaste abrasivo de capas depositadas sobre acero 1020 utilizando el electrodo de fundición blanca al cromo UTP Ledurit – 61. Empleando la microscopia óptica se identificaron y cuantificaron las fases presentes, analizando su efecto en el desgaste. Siendo determinante la influencia de la inclinación de las dendritas y su posición con respecto a 90° en el incremento de la resistencia al desgaste abrasivo. Se caracterizaron los posibles mecanismos de daño superficial provocado por desgaste abrasivo empleando la microscopia electrónica de barrido. Se propusieron modelos lineales para correlacionar la influencia de la cantidad, tamaño, dispersión de los carburos y el ángulo de inclinación de las dendritas, en el incremento de la resistencia al desgaste.The influence of different parameters in layer morphology and abrasion resistance of Fe-Cr-C electrodes UTP Ledurit – 61 on steel 1020 was studied. Introduced Energy (Hi, Number of Layers (Nc, and Deposit Width (Ad were the main parameters considered. The metallographic identification and quantification of metal phases and the determination of their effect in abrasion resistance were made with optical microscopy. The abrasive wear test characterized by scanning electron microscopy, defines a possible mechanism of surface damage. It was found that the angle formed between a normal line to the surface and the dendrite inclination is directly related with the increment of wear resistance. Lineal models that correlate wear resistance with quantity, size, and carbide dispersion and dendrite angle inclination were also developed.
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Ranching is a dynamic business in which profitability is impacted by changing weather and climatic conditions. A ranch-level model using a representative ranch in southeastern Wyoming was used to compare economic outcomes from growing season precipitation scenarios of: 1) historical precipitation da...
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Modeling of U-series Radionuclide Transport Through Soil at Pena Blanca, Chihuahua, Mexico
Pekar, K. E.; Goodell, P. C.; Walton, J. C.; Anthony, E. Y.; Ren, M.
2007-05-01
The Nopal I uranium deposit is located at Pena Blanca in Chihuahua, Mexico. Mining of high-grade uranium ore occurred in the early 1980s, with the ore stockpiled nearby. The stockpile was mostly cleared in the 1990s; however, some of the high-grade boulders have remained there, creating localized sources of radioactivity for a period of 25-30 years. This provides a unique opportunity to study radionuclide transport, because the study area did not have any uranium contamination predating the stockpile in the 1980s. One high-grade boulder was selected for study based upon its shape, location, and high activity. The presumed drip-line off of the boulder was marked, samples from the boulder surface were taken, and then the boulder was moved several feet away. Soil samples were taken from directly beneath the boulder, around the drip-line, and down slope. Eight of these samples were collected in a vertical profile directly beneath the boulder. Visible flakes of boulder material were removed from the surficial soil samples, because they would have higher concentrations of U-series radionuclides and cause the activities in the soil samples to be excessively high. The vertical sampling profile used 2-inch thicknesses for each sample. The soil samples were packaged into thin plastic containers to minimize the attenuation and to standardize sample geometry, and then they were analyzed by gamma-ray spectroscopy with a Ge(Li) detector for Th-234, Pa-234, U-234, Th-230, Ra-226, Pb-214, Bi-214, and Pb-210. The raw counts were corrected for self-attenuation and normalized using BL-5, a uranium standard from Beaverlodge, Saskatchewan. BL-5 allowed the counts obtained on the Ge(Li) to be referenced to a known concentration or activity, which was then applied to the soil unknowns for a reliable calculation of their concentrations. Gamma ray spectra of five soil samples from the vertical profile exhibit decreasing activities with increasing depth for the selected radionuclides
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Bibiana Caballero Mejía
2007-12-01
Full Text Available En dos vertientes de la cuenca de la quebrada Piedras Blancas (Medellín, Colombia se estudió la relación humedad - persistencia de la repelencia al agua en la parte superficial de andisoles bajo dos coberturas vegetales: Cupressus lusitanica (ciprés y Quercus humboldtii (roble, en tres posiciones a lo largo de la vertiente de colinas bajas: superior, media e inferior y en dos condiciones de humedad: con la humedad de campo y con la humedad adquirida al equilibrar al aire durante dos días muestras que habían sido secadas a 105 °C. En cada sitio de la vertiente se ubicó una parcela de 6 m x 5 m y en ella se tomaron 60 muestras de suelo en una malla de 1 m x 0,5 m. La persistencia de la repelencia al agua se evaluó con el método del WDPT en muestras tamizadas a 1 mm. Se presentó un alto número de muestras fuertemente repelentes al agua en todas las condiciones de trabajo, siendo mayor la frecuencia en ciprés que en roble. Tanto la repelencia al agua como la humedad presentaron comportamiento diferencial por cobertura y por posición en la vertiente dentro de la misma cobertura. No se pudo establecer una relación consistente entre el contenido de humedad de las muestras y la persistencia de la repelencia al agua que presentaron, así como tampoco se pudo definir una zona de transición de humedad crítica para que se manifestara la repelencia al agua en ellas, en ninguna de las dos coberturas vegetales y en ninguna posición en la vertiente.In two hillside of the Piedras Blancas watershed ( Medellín, Colombia was studied the relation humidity - persistence of the water repellency on the surface of the andisols under two vegetable covers: Cupressus lusitanica (cypress and Quercus humboldtii (oak groves. These were found in three different positions along the side of low hills: upper, middle and lower grounds, as well as in two conditions of humidity: with the humidity acquired when equilibrated with the air during two days (samples
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Ku, T. L.; Luo, S.; Goldstein, S. J.; Murrell, M. T.; Chu, W. L.; Dobson, P. F.
2009-10-01
Current models using U- and Th-series disequilibria to study radioisotope transport in groundwater systems mostly consider a steady-state situation. These models have limited applicability to the vadose zone (UZ) where the concentration and migratory behavior of radioisotopes in fluid are often transitory. We present here, as a first attempt of its kind, a model simulating the non-steady state, intermittent fluid transport in vadose layers. It provides quantitative constraints on in-situ migration of dissolved and colloidal radioisotopes in terms of retardation factor and rock-water interaction (or water transit) time. For uranium, the simulation predicts that intermittent flushing in the UZ leads to a linear relationship between reciprocal U concentration and 234U/ 238U ratio in percolating waters, with the intercept and slope bearing information on the rates of dissolution and α-recoil of U isotopes, respectively. The general validity of the model appears to be borne out by the measurement of uranium isotopes in UZ waters collected at various times over a period during 1995-2006 from a site in the Peña Blanca mining district, Mexico, where the Nopal I uranium deposit is located. Enhanced 234U/ 238U ratios in vadose-zone waters resulting from lengthened non-flushing time as prescribed by the model provide an interpretative basis for using 234U/ 238U in cave calcites to reconstruct the regional changes in hydrology and climate. We also provide a theoretical account of the model's potential applications using radium isotopes.
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Comportamiento temporal de la radiación solar global en la ciudad de Bahía Blanca, Argentina
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María Eugenia Fernández
2015-08-01
Full Text Available La energía que irradia el Sol es la principal causa de las diferencias climáticas en nuestro planeta y sustenta todos los procesos vitales. Si bien dicha emisión es prácticamente constante para escalas temporales breves, la radiación incidente en cada sitio es variable y depende en gran medida de los estados atmosféricos. En este sentido, la cantidad de cielo cubierto por nubes es un factor primordial, ya que por su capacidad de absorción y reflexión estas pueden reducir sustancialmente la radiación que alcanza la superficie terrestre. El objetivo del presente trabajo es caracterizar el comportamiento de la radiación solar global en la ciudad de Bahía Blanca (Argentina para el período 2001-2011 y comparar los valores radiativos registrados en los años 2007-2011 con datos referidos a coberturas nubosas a fin de establecer relaciones entre ambas variables. La radiación promedio para el intervalo analizado fue de 187,36 W/m 2 . En enero y en diciembre todos los días se registraron radiaciones mayores a 227,4 W/m 2 y en junio y julio la radiación siempre osciló entre 51,5 W/m 2 y 110,1 W/m 2 . En el transcurso del día la radiación alcanza su máximo valor entre las 13:00 h y 13:30 h. En lo que respecta a la relación entre la cobertura nubosa y la radiación global se observaron reducciones de hasta un 10,86 % entre cielos despejados (0 octas y parcialmente nublados (1-5 octas y de hasta 44,35 % entre cielos despejados y cubiertos (6-8 octas. En término medio, los días claros reciben alrededor de un 16 % más de radiación que todos los días en conjunto.
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Peter Andrew Lindsey
Full Text Available Changing land use patterns in southern Africa have potential to dramatically alter the prospects for carnivore conservation. Understanding these influences is essential for conservation planning. We interviewed 250 ranchers in Namibia to assess human tolerance towards and the distribution of large carnivores. Cheetahs (Acinonyx jubatus, leopards (Panthera pardus and brown hyaenas (Hyaena brunnea were widely distributed on Namibian farmlands, spotted hyaenas (Crocuta crocuta had a narrower distribution, and wild dogs (Lycaon pictus and lions (Panthera leo are largely limited to areas near source populations. Farmers were most tolerant of leopards and least tolerant of lions, wild dogs and spotted hyaenas. Several factors relating to land use correlated consistently with carnivore-presence and landowner tolerance. Carnivores were more commonly present and/or tolerated where; wildlife diversity and biomass were higher; income from wildlife was higher; income from livestock was lower; livestock biomass was lower; in conservancies; game fencing was absent; and financial losses from livestock depredation were lower. Efforts to create conditions whereby the costs associated with carnivores are lowest, and which confer financial value to them are likely to be the most effective means of promoting carnivore conservation. Such conditions are achieved where land owners pool land to create conservancies where livestock are replaced with wildlife (or where livestock husbandry is improved and where wildlife generates a significant proportion of ranch income. Additional measures, such as promoting improved livestock husbandry and educational outreach efforts may also help achieve coexistence with carnivores. Our findings provide insights into conditions more conducive to the persistence of and tolerance towards large carnivores might be increased on private (and even communal lands in Namibia, elsewhere in southern and East Africa and other parts of the world
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Ricardo Gómez
2010-10-01
Full Text Available Con el propósito de generar un conocimiento aproximado (holístico a la realidad, de un territorio claramente definible, por constituirse en un ecosistema estratégico dentro del conjunto andino; se eligió profundizar en sus condiciones biofísicas, ambientales y antrópicas bajo una mirada construida a través de diálogo de saberes de disciplinas de conjunto y orgánicas. Además, para una valoración metodológica conjunta, y así prospectar un escenario de futuro. El proyecto de investigación busca garantizar su sostenibilidad y evolución en un orden consecuente con la permanencia de la vida diversa, donde el hombre se conforme con ser interventor positivo de la naturaleza y a estar encadenado a la vida como una sola (Odum, 1972. Este artículo ayuda a identificar la problemática y las potencialidades del conjunto, en la relación naturaleza-cultura (Gómez:2009, lo que corresponde sólo a la fase diagnostica y parte de la propuesta metodológica. El fin es propiciar la concreción de acciones en proyectos que sirvan para mejorar las condiciones de vida de los habitantes, con un uso racional del entorno. El artículo presenta resultados preliminares de un primer acercamiento con trabajo de campo, del proyecto piloto titulado “Diagnostico sobre prácticas histórico-sociales y culturales, tecnológicas agropecuarias y participación de la mujer en la Vereda de Peñas Blancas del municipio de Arcabuco. Boyacá”.
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An Analysis of the Motivations of Oregon's Ranchers to Diversify into Agritourism
Fernanda de Vasconcellos Pêgas; Joanne F. Tynon
2004-01-01
Cattle ranches are unique American cultural icons. Unfortunately, ranching is also associated by some with the exploitation of natural resources and labeled an environmentally destructive activity motivated by greedy and neglectful livestock operators (Jacobs, 1991; Wuerthner, 1990). Some believe that livestock ranching is a major contributor to unsustainable land use...
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Directory of Open Access Journals (Sweden)
Mercedes di Pasquo
2009-01-01
Full Text Available Se analiza e ilustra, por primera vez, una tafoflora hallada en estratos de la Formación Tarija que aflora en Arroyo Aguas Blancas, Provincia de Salta, Argentina. Se describen, también, dos especies nuevas: Malanzania starckii (licofita y Grumosisporites delpapae (espora trilete. Se reconocieron improntas de semillas platispérmicas (Sama-ropsis nunezii García emend. A. Archangelsky, Cordaicarpus cesariae Gutiérrez, Ganuza, Morel y Arrondo emend. A. Archangelsky, improntas de tallos articulados {Paracalamites australis Rigby emend. Zampirolli y Bernardes de Oliveira y compresiones/improntas de fragmentos foliares (Cordaites riojanus Archangelsky y Leguizamón, Ginkgo-phyllum sp. cf. G. diazii Archangelsky y Arrondo. Esta asociación es atribuida al Pennsylvaniano s.l. sobre la base de la distribución estratigráfica de las especies seminales. La asociación palinológica se compone de 101 especies, 53 de ellas reconocidas como autóctonas y 48 retrabajadas. El primer conjunto comprende 34 especies de esporas trilete, 11 granos de polen monosacado, un grano bisacado y siete especies de algas. El grupo retrabajado se compone de 27 esporas trilete y criptosporas, 20 especies de acritarcas, prasinofitas y otras algas y un quitinozoario. La presencia de especies exclusivas de la BiozonaD. bireticulatus-C. chacoparanensis (BC (e.g., Dictyotriletes bireticulatus (Ibrahim Potonié y Kremp emend. Smith y Butterworth, Crucisaccites latisulcatus Lele y Maithy, Verrucosisporites morulatus (Knox Potonié y Kremp emend. Smith y Butterworth, permite acotar su edad al Bashkiriano tardío-Moscoviano. La vegetación, compuesta principalmente por licofitas, esfenofitas, pteridofitas y gimnospermas, se habría desarrollado en diferentes ambientes continentales como lagos y ríos alimentados por glaciares de montaña.Fossil plant remains found in the Tarija Formation cropping out at the Aguas Blancas creek, Aguaragüe range, Salta Province, Argentina, are analy
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7 CFR 301.81-3 - Quarantined areas.
2010-01-01
... intersection of Avenue 50 and Jackson Street; then south along Jackson Street to 54th Avenue; then west along... Canyon Ranch Road to Valley Ranch Road; then east along Valley Ranch Road to Michael Way; then south along Michael Way to Casey Court; then east along Casey Court to the Moreno Valley City Limits; then...
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Marina Díaz López
2017-02-01
Full Text Available Cantinflas es uno de los hitos fundamentales en el cine mexicano, como demuestra su presenciaa lo largo de buena parte del siglo XX y la perdurabilidad de su mito. El estudio de su estelarización va de la cultura prerrevolucionaria —de la que surge el personaje del pelado que encarnará—, al momento en el que se incluye como Cantinflas en la producción industrial de cine de la época de los cuarenta. En este artículo, este proceso se concretará con el estudio de su incorporación a las dos películas en las que participó como personaje en el universo ranchero, género clave para el primer periodo de consolidación de esa industria y, por tanto, emblema de su época clásica: ¡Así es mi tierra! (Arcady Boytler, 1937 y El siete machos (Miguel M. Delgado, 1950. Su presencia en este locus absolutamente ajeno explica la funcionalidad de su estrella y la forma de trabajo de la industria mexicana. Dado que ambas películas pertenecen a dos etapas diferentes de su carrera, el análisis de las mismas permite entender también el trabajo de construcción y la evolución de su estrella.Palabras clave: Cantinflas, cine mexicano, cultura popular, teatro popular, starsystem, comedia ranchera, modernización, ¡Así es mi tierra!, El siete machos.Abstract:If we take Cantinflas presence throughout the 20th Century into consideration and the fact that his myth has lasted so long, he is a milestone in Mexican Cinema. The study of the process of his becoming a star began in the pre-revolutionary culture, when his ‘pelado’ character emerged, to the moment in which he enters as Cantinflas in the film industry, during the forties. In this article, this process will be analysed in the two films in which he participated in the ranch universe films; a genre that was crucial in the beginning of the industrial consolidation and, therefore, a symbol of this classic period: ¡Así es mi tierra! (Such is my Country, Arcady Boytler, 1937 and El siete machos
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Danilo Granados
2014-08-01
Full Text Available En Campeche, México no existen estudios de la dieta de Odocoileus virginianus thomasi; a pesar de la existencia de 122 Unidades de Manejo para la Conservación de la Vida Silvestre (UMAS en donde se realiza aprovechamiento del venado cola blanca. Los objetivos del trabajo fueron conocer la composición botánica de la dieta y su cambio estacional, la disponibilidad de forraje, la capacidad de carga y carga animal de O. virginianus thomasi. El trabajo se realizó de octubre 2010 a mayo 2012 en el Campo Experimental del Colegio de Postgraduados en Campeche, México. La composición de la dieta se determinó mediante el análisis de heces de venado y material de referencia con la técnica microhistológica; la disponibilidad de forraje se estimó con el método de Adelaide; la capacidad de carga utilizando la presión de pastoreo y la carga animal considerando el forraje disponible y 35% de eficiencia de utilización. La dieta incluyó 40 especies de 15 familias. La riqueza de especies más alta fue de 29 especies en la época de lluvia; las arbustivas fueron preferidas en las tres épocas del año y las herbáceas en la época de lluvia. La composición de la dieta, disponibilidad de forraje, la capacidad de carga y carga animal variaron a través del año. La capacidad de carga fluctuó entre 0.04 a 1.08 venados/ha.
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Directory of Open Access Journals (Sweden)
Ulises Aguilera-Reyes
2013-03-01
Full Text Available El venado cola blanca es una especie con una gran plasticidad conductual y de adaptación en diferentes hábitat. En el Parque Sierra Nanchititla en el Estado de México se realizó un estudio para determinar los hábitos alimentarios en el bosque mesófilo de montaña (BMM y bosque de pino-encino (BPE. De junio 1990 a mayo 1992 se recolectaron 104 muestras de excremento de venado en las dos zonas de estudio. Aplicamos el índice de Morisita y la correlación de Spearman para determinar la preferencia alimentaria. Se utilizó el análisis histológico de heces fecales para herbívoros las cuales se compararon con muestras de tejidos vegetales de plantas de la zona de estudio. Los resultados muestran que consume el 79.44% de especies vegetales del BMM y 20.56% del BPE. Existe cierta tendencia en la selectividad de 12 de las 14 especies de plantas localizadas en el BMM, mientras que para el BPE no se aprecia tal tendencia. Las especies clave que for- man parte de la alimentación elemental del venado fueron: Acalypha setosa, Smilax pringlei, Psidium sartorianum y Dendropanax arborea. El consumo de plantas no varió sig- nificativamente entre la época seca y lluviosa en función de la forma biológica (X2=12, p=0.21. Sin embargo, durante la época seca existe cierta tendencia a consumir árboles y a finales de la época de lluvia a consumir hierbas (Z=1.61, p=0.95. Los datos indican que el venado puede ser selecti- vo con plantas del BMM, mientras que para el BPE tiende a ser oportunista.
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Aspectos biológicos y poblacionales de Nasonovia ribisnigri y Aulacorthum solani sobre lechuga
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Vasicek Araceli
2002-01-01
Full Text Available Se estimó la influencia de los cultivares Criolla Blanca, Cuatro Estaciones y Gallega, sobre la biología y los parámetros poblacionales de Nasonovia ribisnigri y Aulacorthum solani (Homoptera: Aphidoidea a 10±1ºC y HR de 90%. Los períodos ninfal, pre-reproductivo y post-reproductivo de N. ribisnigri fueron más largos sobre Cuatro Estaciones, no así el reproductivo. En A. solani el período ninfal fue más largo sobre Criolla Blanca y Cuatro Estaciones resultando el reproductivo mayor sobre Cuatro Estaciones. Las tasas intrínsecas de crecimiento natural (r m de N. ribisnigri y A. solani fueron mayores sobre Criolla Blanca y Gallega, respectivamente. De acuerdo a la especie predominante convendría utilizar Cuatro Estaciones para N. ribisnigri y Criolla Blanca para A. solani, en épocas frías.
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José Alfredo Samaniego-Gaxiola
2007-12-01
Full Text Available En La Laguna, Coahuila-Durango, México (zona con una precipitación anual entre 80 a 250 mm se estudió la estructura de géneros de hongos del suelo en 3 campos de cultivo agrícola. Del suelo de Tierra Blanca, una huerta de nogal de 51 años, fueron aislados 23 géneros de hongos y de otros 2 suelos, una huerta de nogal de 14 años, nombrada El Chupón y un campo con cultivo de alfalfa, denominado San Jorge, se aislaron l2 géneros. Para cada género se calculó su valor índice de ímportancia (V I I. El género Fusarium tuvo el mayor V I I en los 3 suelos estudiados (71-98. La diversidad (calculada con el índice de Shannon de géneros fue diferente para cada suelo de acuerdo con intervalos de confianza (95%, con valores de 1.89, 1.72 y 1.19 para Tierra Blanca, El Chupón y San Jorge, respectivamente. Se calcularon índices ecológicos adicionales, como, Simpson, máxima riqueza (H' max y regularidad (J'. Los valores del índice de Simpson y de J' fueron similares en Tierra Blanca y San Jorge, pero sólo H' max fue similar entre El Chupón y San Jorge. El índice de similitud de Shøresen fue igual al comparar Tierra Blanca con El Chupón o Tierra Blanca con San Jorge (51.4, pero distinto entre el Chupón y San Jorge (58.3. El índice β para las combinaciones Tierra Blanca vs. San Jorge y Tierra Blanca vs. El Chupón fueron de 0.43, pero para San Jorge vs. El Chupón fue de 0.83. Los géneros de hongos del suelo que se encontraron en La Laguna coinciden en 67-75% con los encontrados en suelos desérticos de Israel, pero en La Laguna la estructura de los géneros de hongos es distinta; aquí domina Fusarium y aparecen nuevos géneros, como Trichoderma. Los cambios en la micobiota del suelo pueden haber ocurrido por la actividad agrícola en los últimos 50 años.This study was carried out in agricultural soils in La Laguna, Coahuila - Durango, Mexico (annual precipitation 80-250 mm. The structure of soil fungal genera of three field soil
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Silvia S Ginsberg
2009-01-01
Full Text Available El estuario de Bahía Blanca, ubicado al sur de la provincia de Buenos Aires (Argentina, constituye una costa baja con extensas llanuras de marea, islas y una compleja red de canales de diferentes magnitudes. Estos últimos integran un sistema de canales interconectados. El objetivo de este trabajo es establecer la circulación sedimentaria como carga de fondo en un sistema de canales interconectados (Cabeza de Buey, El Alambre, La Lista y Principal mediante el análisis de los rasgos morfológicos de fondo, utilizando métodos acústicos (ecosonda y sonar lateral. El canal Cabeza de Buey se comunica con el canal La Lista a través del canal El Alambre. Los dos primeros vierten sus aguas en el canal Principal. El canal Cabeza de Buey posee un lecho plano constituido por material pelítico con arena muy fina. En su tramo más interno se presentan dunas medianas compuestas por arena fina, con un perfil asimétrico según el reflujo. Estas formas, continúan su desarrollo ininterrumpidamente hacia el canal El Alambre, donde se originan dunas grandes (altura 1,5 m formadas por arena muy fina. Sus crestas son sinuosas o barjanoides y poseen su talud hacia la corriente de bajante. En el canal La Lista se determinan dunas asimétricas medianas orientadas según el reflujo y grandes linea-ciones sedimentarias (sand ribbons sobre un fondo consolidado. El sedimento movilizado por la corriente corresponde a la fracción limo-arena fina. La distribución y configuración de las geoformas evidencian que el transporte sedimentario como carga de fondo se concentra principalmente en el canal La Lista. Es así como en el sistema de canales estudiado, sólo un canal de marea regula la dispersión de arena, transportando un importante volumen hacia el canal de navegación.Bahia Blanca estuary located in the south of Buenos Aires province, Argentina, is characterized by a low coastal area with large tidal plains, islands, and a complex network of tidal channels of
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Ciccarelli, Fabián
2010-01-01
El propósito de la tesis es identificar las causas de la menor evolución en las exportaciones de granos realizadas por el Puerto Quequén (anexo III), respecto al crecimiento constante de la producción del país y al incremento en las exportaciones de los puertos de Bahía Blanca y Rosario, dado que es un eslabón crítico que impacta directamente en la cadena agroindustrial exportadora, la cual representa aproximadamente el 70% del PBI de la comunidad de Necochea/Quequén. Para la identificación d...
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José Manuel López-Peláez
2016-01-01
Full Text Available Nella Madrid degli anni sessanta l’architetto navarro Sáenz de Oíza sperimenta la costruzione di un edificio residenziale a torre in cemento armato. Risultato della felice relazione con un imprenditore mecenate, Juan Huarte, l’edificio si articola nella variazione tipologica di alloggi ad L e duplex, di locali per uffici e servizi, fino agli spazi ad uso comune, come la piscina e il ristorante della terrazza sul tetto, per proporsi come modello di piccola città autosufficiente. / In 1960s Madrid, the Navarrese architect Sáenz de Oíza tried constructing a residential tower in reinforced concrete. The happy result of a partnership with an entrepreneur patron, Juan Huarte, the building is split into L-shaped dwellings and duplexes, rooms for offices and services, as well as communal spaces, such as a swimming pool and a restaurant on the roof terrace, to exemplify a model of a small, self-sufficient town.
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Luo, S.; Ku, T.; Todd, V.; Murrell, M. T.; Dinsmoor, J. C.
2007-05-01
The Nopal I uranium ore deposit at Pena Blanca, Mexico, located at > 200 meters above the groundwater table, provides an ideal natural analog for quantifying the effectiveness of geological barrier for isolation of radioactive waste nuclides from reaching the human environments through ground water transport. To fulfill such natural analog studies, three wells (PB1, PB2, and PB3 respectively) were drilled at the site from the land surface down to the saturated groundwater zone and ground waters were collected from each of these wells through large- volume sampling/in-situ Mn-filter filtration for analyses of short-lived uranium/thorium-series radionuclides. Our measurements from PB1 show that the groundwater standing in the hole has much lower 222Rn activity than the freshly pumped groundwater. From this change in 222Rn activity, we estimate the residence time of groundwater in PB1 to be about 20 days. Our measurements also show that the activities of short-lived radioisotopes of Th (234Th), Ra (228Ra, 224Ra, 223Ra), Rn (222Rn), Pb (210Pb), and Po (210Po) in PB1, PB2, and PB3 are all significantly higher than those from the other wells near the Nopal I site. These high activities provide evidence for the enrichment of long-lived U and Ra isotopes in the groundwater as well as in the associated adsorbed phases on the fractured aquifer rocks underneath the ore deposit. Such enrichment suggests a rapid dissolution of U and Ra isotopes from the uranium ore deposit in the vadose zone and the subsequent migration to the groundwater underneath. A reactive transport model can be established to characterize the in-situ transport of radionuclides at the site. The observed change of 222Rn activity at PB1 also suggests that the measured high radioactivityies in ground waters from the site isare not an artifact of drilling operations. However, further studies are needed to assess if or to what extent the radionuclide migration is affected by the previous mining activities at
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Emerging Glacial Lakes in the Cordillera Blanca, Peru: A Case Study at Arteson Glacier
Chisolm, R. E.; Mckinney, D. C.; Gomez, J.; Voss, K.
2012-12-01
Tropical glaciers are an essential component of the water resources systems in the mountainous regions where they are located, and a warming climate has resulted in the accelerated retreat of Andean glaciers in recent decades. The shrinkage of Andean glaciers influences the flood risk for communities living downstream as new glacial lakes have begun to form at the termini of some glaciers. As these lakes continue to grow in area and volume, they pose an increasing risk of glacial lake outburst floods (GLOFs). Ice thickness measurements have been a key missing link in studying the tropical glaciers in Peru and how climate change is likely to impact glacial melt and the growth of glacial lakes. Ground penetrating radar (GPR) has rarely been applied to glaciers in Peru to measure ice thickness, and these measurements can tell us a lot about how a warming climate will affect glacier mass balance. This study presents GPR data taken in July 2012 at the Arteson glacier in the Cordillera Blanca, Peru. A new lake has begun to form at the terminus of the Arteson glacier, and this lake has key features, including overhanging ice and loose rock likely to create landslides, that could trigger a catastrophic GLOF if the lake continues to grow. This new lake is part of a series of three lakes that have formed below the Arteson glacier. The two lower lakes, Artesonraju and Paron, are much larger so that if there were an avalanche or landslide into the new lake below Arteson glacier, the impact could potentially be more catastrophic than a GLOF from one single lake. Estimates of how the lake mass balance is likely to evolve due to the retreating glacier are key to assessing the flood risk from this dynamic three-lake system. Because the glacier mass balance and lake mass balance are closely linked, the ice thickness measurements and measurements of the bed slope of the Arteson glacier and underlying bedrock give us a clue to how the lake is likely to evolve. GPR measurements of
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Arte Público y Memoria Ferroviaria II Paseo de las Esculturas, Bahía Blanca, República Argentina.
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Diana I. Ribas
2017-07-01
Full Text Available En los noventa, la degradación final del sistema ferroviario estatal impulsada por el Presidente Carlos Menem en el marco de una serie de normas neoliberales implicó, paradójicamente, que los restos materiales se convirtieran en una atracción para el arte público regional. En ese entonces, el Museo Municipal de Arte de Bahía Blanca impulsó un Simposio Nacional de Escultura Monumental invitando a diez artistas a utilizar la chatarra de hierro desde el paradigma moderno de arte autónomo. Las obras fueron instaladas en una parte del entubamiento del arroyo Napostá, que fue integrado a otras acciones de planeamiento urbano que valorizaron la zona norte de la ciudad. El nuevo parque lineal comenzó a ser llamado Paseo de las Esculturas. Dos variables reafirman la categoría de arte público en esta activación de la memoria ferroviaria. En primer lugar, el espacio en donde están emplazadas es público, en tanto es de propiedad estatal y, sobre todo, por ser de libre acceso. A su vez, los debates posteriores suscitados por el soporte artístico no tradicional, por la colocación de cercos en tres de las obras y por los costos de la puesta en valor del sector en 2016/17, implican una operación que ha superpuesto una dimensión ideológico-política (esfera pública a la territorial. Por otro lado, en las fuentes documentales la palabra “público” ha sido utilizada en referencia a representaciones sociales vinculadas con la exhibición y la recepción. El carácter duradero de los viejos hierros ferroviarios ha permitido que las formas instaladas en el parque lineal sean constructoras de distintos esquemas intelectuales que, según lo registrado, en su mayoría no han remitido a las historias que han atravesado al material ni a las acciones que desarticularon el sistema de transporte. En síntesis, si bien las esculturas del Paseo introdujeron la no figuración monumental en un sector de la trama urbana bahiense y cumplieron un rol pedag
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Isaac Amigo
2005-03-01
Full Text Available La hipertensión de bata blanca (HBB puede considerarse como un falso diagnóstico de hipertensión que puede provocar tratamientos farmacológicos innecesarios, afectar a la calidad de vida de las personas e incrementar de un modo notable el gasto sanitario. Se calcula que la prevalencia de la HBB se situaría en torno a un 20% de los pacientes diagnosticados como hipertensos. Las investigaciones experimentales subrayan que la enfermera obtiene, en general, medidas más fiables de la presión arterial (PA que los médicos y que por ello puede desempeñar un papel fundamental para prevenir estos falsos diagnósticos. En esta línea se subrayan seis actuaciones profesionales que contribuirían de manera decisiva para prevenir estos errores.White coat hypertension (WCH can be considerated an erroneous diagnosis of essential hypertension and can represents a serious problem when we consider the clinical and pharmacological and economic consequences of an incorrect blood pressure measurement. The prevalence of WCH is situated around 20% of the patients diagnosed as having high blood pressure. The results from different studies point out that the nurses usually obtain more reliable blood pressure readings than the doctors, because of that they can play an important role in the control of WCH. In relation to this a total of six specific recommendations are put forward with the aim of preventing an erroneous diagnosis of essential hypertension.
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A incontinência urinária em mulheres e os aspectos raciais: uma revisão de literatura
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Lígia da Silva Leroy
2012-01-01
Full Text Available Revisión de literatura cuyo objetivo fue identificar las asociaciones entre la incontinencia urinaria en las mujeres y los aspectos raciales. Se utilizaron las bases de datos MEDLINE y LILACS para investigar los artículos publicados en los años 2003 a 2010. Se analizaron 30 publicaciones que indicaron diferentes relaciones entre la incontinencia y la raza. La prevalencia de la incontinencia fue mayor entre las mujeres blancas. La incontinencia urinaria de esfuerzo fue más frecuente entre blancas y de urgencia entre negras. Blancas y asiáticas tenían pérdida urinaria en menor cantidad en comparación con las negras e hispanas. El impacto en la calidad de vida está más relacionada con la severidad de la pérdida de orina y otros factores, y no específicamente a la cuestión de la racial. Blancas tuvieron un mejor conocimiento acerca de la incontinencia y con mayor frecuencia fueron sometidos a tratamiento quirúrgico por la incontinencia urinaria de esfuerzo. Las blancas y latinas tienen mayor riesgo de incontinencia cuando comparadas con las negras y asiáticas. Se resalta la necesidad de estudios brasileños para que los datos puedan ser adecuados a nuestra realidad.
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2005-03-31
including self-employed or regular volunteer work; with a job, but not at work because of temporary illness, vacation, or strike; unemployed , laid off, or...17 unemployed (6 Ranch Hands, 11 Comparisons) 707 retired (289 Ranch Hands, 418 Comparisons) 39 who did not answer the question (20 Ranch Hands, 19...Over time, the prevalence of psychic disturbances decreased substantially (27). In a recent follow-up study of 13 workers in this cohort, plasma
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Haley, Bethany M.
A successful environmental education (EE) program is one that supports the mission of the parent organization, meets the needs of its audiences, and is effective at increasing environmental literacy. The High Lonesome Ranch (HLR), a private corporation that operates according to a mixed-use landscape model inspired by Aldo Leopold's land ethic, intends to develop an EE program that will operate within an associated nonprofit organization, the High Lonesome Institute (HLI), to further the mission of promoting a contemporary land ethic. Although HLR owners and staff are motivated to develop an EE program, there is currently no clear consensus regarding an overall vision for the program. The purpose of my thesis is to provide HLR owners and their advisors with a recommended design for the education program based on the missions of the HLR and HLI, sound EE theory, stakeholder feedback, and feasibility within the environment of the HLR. To accomplish this, I reviewed pertinent EE literature, reviewed the models used by existing EE programs, and undertook a two-pronged qualitative case study that gathered feedback from the major stakeholders in the HLR/HLI program. The case study included stakeholder interviews and a one-day facilitated charrette. Although feedback from stakeholders on specific program elements ranged widely, there was widespread support for an EE program at the HLR. From this research, I made a series of recommendations regarding how the HLR/HLI should proceed in development, specific program elements, and next steps in the process.
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1989-12-15
Park are in the center of the lower third of i the MOA. Also under the MOA is the Capulin Volcano National Monument in the upper northwest and Clayton...Park, Capulin Volcano National Monument, a ranch near Quay and the village of House, New Mexico, near the Melrose Range. The Bell Ranch Complex is...is a 1 nm avoidance area around Mosquero and 2 nm area around Capulin Volcano National Monument, Bell Ranch, Quay, Kenton State Park, 2 specified
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Gastro-Intestinal Parasites of Warthogs (Phacochoerus Africanus ...
African Journals Online (AJOL)
Gastro-Intestinal Parasites of Warthogs (Phacochoerus Africanus) from the Nazinga Game Ranch of Burkina Faso. ... the prevalence of gastrointestinal parasites in warthogs from the Nazinga Game Ranch of ... AJOL African Journals Online.
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Lucas Gaíva E Silva
2014-12-01
Full Text Available The prevalence of antibodies against Equine Influenza Virus (EIV was determined in 529 equines living on ranches in the municipality of Poconé, Pantanal area of Brazil, by means of the hemagglutination inhibition test, using subtype H3N8 as antigen. The distribution and possible association among positive animal and ranches were evaluated by the chi-square test, spatial autoregressive and multiple linear regression models. The prevalence of antibodies against EIV was estimated at 45.2% (95% CI 30.2 - 61.1% with titers ranging from 20 to 1,280 HAU. Seropositive equines were found on 92.0% of the surveyed ranches. Equine from non-flooded ranches (66.5% and negativity in equine infectious anemia virus (EIAV (61.7% were associated with antibodies against EIV. No spatial correlation was found among the ranches, but the ones located in non-flooded areas were associated with antibodies against EIV. A negative correlation was found between the prevalence of antibodies against EIV and the presence of EIAV positive animals on the ranches. The high prevalence of antibodies against EIV detected in this study suggests that the virus is circulating among the animals, and this statistical analysis indicates that the movement and aggregation of animals are factors associated to the transmission of the virus in the region.
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Gerardo Toro-Farmer
2004-03-01
Full Text Available Los erizos regulares son uno de los principales grupos de organismos bioerosionadores que destruyen los arrecifes coralinos alrededor del mundo. En el presente estudio se determinaron los patrones de distribución y abundancia y las tasas de carbonato de calcio removido en el arrecife de Playa Blanca por Centrostephanus coronatus, una de las especies de erizos más abundante en este arrecife. Para este fin se realizaron cuatro visitas al arrecife entre 1997 y 1998 durante las cuales se contabilizó el número de individuos en cada una de las principales zonas arrecifales (Trasarrecife, Plataforma-Cresta, Frente, y Talud. Las tasas de erosión fueron determinadas por medio del análisis del contenido estomacal de un número representativo de individuos colectados en cada zona. Cada sistema digestivo fue calcinado para eliminar la materia orgánica y conservar solamente la porción inorgánica de carbonato de calcio. C. coronatus presentó sus mayores densidades hacia las zonas centrales del arrecife (12.4 ind/m² ; rango 0-48 ind/m² . La tasa de bioerosión promedio más alta de C. coronatus fue de 0.103 kgCaCo3 /m² /año en la Plataforma-Cresta (rango 0 a 0.69 kgCaCo3 /m² /año. En las otras zonas (trasarrecife y frente las tasas promedio de erosión fueron 0.071 (0-0.39 y 0.052 (0-0.31 kgCaCo3 /m² /año respectivamente. De acuerdo con estos datos fue posible comprobar que la destrucción de esqueletos de corales en este arrecife por esta especie de erizo es baja, comparada con la acción abrasionadora de este tipo de organismos en otras partes del mundo. Sin embargo, la acción combinada de C. coronatus con otros organismos bioerosionadores y con algunos factores ambientales adversos para los corales, puede estar provocando un desbalance entre los procesos normales de contrucción-destrucción arrecifal en la Isla GorgonaRegular sea-urchins are one of the main bioeroding organisms affecting coral reefs around the world. The abundance
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National Research Council Canada - National Science Library
Michalek, J
2000-01-01
... attributable to exposure to herbicides exist in veterans of Operation Ranch Hand Operation. Ranch Hand was the unit responsible for the aerial spraying of herbicides, including Herbicide Orange, in Vietnam from 1961 to 1971...
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The feeding habits of brown hyaenas ( Hyaena brunnea ) on a game ...
African Journals Online (AJOL)
The feeding habits of brown hyaenas ( Hyaena brunnea ) on a game ranch in Limpopo Province, South Africa. ... brown hyaena Hyaena brunnea scats from a game ranch in the Limpopo Province, South Africa. ... AJOL African Journals Online.
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Towards assessing managerial competencies and leadership styles ...
African Journals Online (AJOL)
One way of achieving long term sustainability of game ranches in South Africa is to ensure the ... assess the management competencies and leadership styles needed by game ranch managers/owners in order ... AJOL African Journals Online.
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S. B. Brú-Cordero
2017-01-01
Full Text Available Se evaluó el desempeño productivo de cachama blanca y tilapia nilótica cultivadas en biofloc y alimentadas con dietas de origen vegetal. Se cultivaron 80 peces/m3 en proporción 1:1 (cachama : tilapia, con tres niveles de proteína bruta (PB: 16% (T16, 24% (T24 y 32% (T32, en tanques de 1.000 l, con aireación permanente durante 120 días. Se estimaron parámetros de crecimiento, rendimiento, calidad de agua, costos de producción y análisis proximal de los flóculos. El oxígeno disuelto se mantuvo con saturación por encima de 100% y los compuestos nitrogenados (NO2 = 0,4-0,5 mg/l, NO3 = 0,4-0,5 mg/l, NH3 = 0,2-0,3 mg/l, TAN = 2,2-2,4 mg/l no presentaron diferencias entre los tratamientos (P > 0,05. Los pesos finales de la cachama (173,5-196,2 g fueron entre dos y cuatro veces los obtenidos por la tilapia (43,0-87,9 g. El mejor rendimiento del bicultivo se obtuvo con la dieta T24 (11,4 ± 1,3 kg/m3, el cual también registró el menor FCA (0,9 ± 0,3. Producir un kilogramo de pescado costó entre COP $3.148 (T24 y COP $4.445 (T32; del cual el alimento representó entre 49,2% (T16 y 63,3% (T32 y la energía, entre 10,3% (T32 y 14,2% (T16 de los costos. El análisis proximal de los flóculos registró niveles de proteína bruta (29-36% PB adecuados para cachama y tilapia; pero con niveles bajos de lípidos (< 1,0%. El desempeño productivo y los costos de producción permiten sugerir la viabilidad que ofrece el sistema biofloc para la producción de carne de pescado con alimento de 24% PB de origen vegetal.
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Sebastián O Verdecchia
2011-07-01
Full Text Available Two tectono-thermal metamorphic events, M1-D1 (S1, with associated white mica and chlorite: WM1-Chl1 and M2-D2 (S2, with development of WM2-Chl2, are established from polyphase white mica growth for low-grade units from the Ordovician metasedimentary successions of La Cébila Metamorphic Complex in the Famatinian belt (western-central Argentina. The thermobarometric characterization of the M1 main event was carried out by means of clay-mineral analysis and crystallo-chemical parameter measurements. Epizonal (temperatures between 300 and 400°C and low-pressure conditions are suggested for M1 event, based in Kübler index values ranging from 0.23 to 0.17 A°20, white mica b parameter values between 9.004 and 9.022 Á (mean of 9.014 Á, n=16 and Si contents between 3.13-3.29 a.p.f.u. Temperatures of ~180-270°C are estimated for the M2 event, with Kübler index values ranging from 0.31 to 0.46 A°20. The M1-D1 event of La Cébila could be linked to high-strain heating tectono-metamorphic Ordovician regime recorded in others complexes from Famatinian foreland region of Sierras Pampeanas.Dos eventos tectono-metamórficos fueron establecidos a partir de la blastesis superpuesta de mica blanca en sucesiones metasedimentarias ordovícicas de bajo grado del Complejo Metamórfico La Cébila, cinturón Famati-niano (centro oeste de Argentina: M1-D1 (S1, con blastesis asociada de mica blanca y clorita: WM1-Chl1 y M2-D2 (S2, con desarrollo de WM2-Chl2. La caracterización termobarométrica del evento principal M1 fue llevada a cabo a través del análisis de minerales de arcilla y de la medición de parámetros cristaloquímicos. Las condiciones de epizona con temperaturas entre 300 y 400°C, y baja presión fueron estimadas para el evento M1 sobre la base de valores de índice de Kübler de 0,23 a 0,17 A°20, parámetro b de la mica blanca entre 9,004 y 9,022 Á (valor medio de 9,014 Á, n=16 y contenidos de Si entre 3,13-3,29 a.p.f.u. Se estimaron
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Schindler, Michael; Fayek, Mostafa; Hawthorne, Frank C.
2010-01-01
The Nopal I uranium deposit of the Sierra Peña Blanca, Mexico, has been the focus of numerous studies because of its economic importance and its use as a natural analog for nuclear-waste disposal in volcanic tuff. Secondary uranyl minerals such as uranophane, Ca[(UO 2)(SiO 3OH)] 2(H 2O) 5, and weeksite, (K,Na) 2[(UO 2) 2(Si 5O 13)](H 2O) 3, occur in the vadose zone of the deposit and are overgrown by silica glaze. These glazes consist mainly of opal A, which contains small particles of uraninite, UO 2, and weeksite. Close to a fault between brecciated volcanic rocks and welded tuff, a greenish silica glaze coats the altered breccia. Yellow silica glazes from the center of the breccia pipe and from the high-grade pile coat uranyl-silicates, predominantly uranophane and weeksite. All silica glazes are strongly zoned with respect to U and Ca, and the distribution of these elements indicates curved features and spherical particles inside the coatings. The concentrations of U and Ca correlate in the different zones and both elements inversely correlate with the concentration of Si. Zones within the silica glazes contain U and Ca in a 1:1 ratio with maximum concentrations of 0.08 and 0.15 at.% for the greenish and yellow glazes, respectively, suggesting trapping of either Ca 1U 1-aqueous species or -particles in the colloidal silica. X-ray photoelectron spectroscopy (XPS), Fourier-transform infra-red spectroscopy (FTIR), and oxygen-isotope ratios measured by secondary-ion mass spectrometry (SIMS) indicate higher U 6+/U 4+ ratios, higher proportions of Si-OH groups and lower δ 18O values for the greenish silica glaze than for the yellow silica glaze. These differences in composition reflect increasing brecciation, porosity, and permeability from the center of the breccia pipe (yellow silica glaze) toward the fault (green silica glaze), where the seepage of meteoric water and Eh are higher.
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Portfolio selection theory and wildlife management | Hearne | ORiON
African Journals Online (AJOL)
Portfolio selection theory and wildlife management. ... Abstract. With a strong commercial incentive driving the increase in game ranching in Southern Africa the need has come for more advanced management tools. ... Keywords: Portfolio selection, multi-objective optimisation, game ranching, wildlife management.
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78 FR 34120 - Endangered Species; Marine Mammals; Issuance of Permits
2013-06-06
..., 2012 October 22, 2012. 73893A A.C. Ranch 77 FR 46514; August 3, September 27, 2012. 2012. 75535A Dub...; August 3, September 27, 2012. 2012. 75592A Dub Wallace Ranch LLC..... 77 FR 46514; August 3, September 27...
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Directory of Open Access Journals (Sweden)
L. Rodríguez
2011-01-01
muscular de proteína y energía. En cuanto al diseño experimental, este fue completamenteal azar, con cuatro tratamientos y cuatro repeticiones, cada una con cuatroindividuos. Se seleccionaron 64 individuos con 58,40 ± 6,56 g de peso (P y 14,65 ±0,75 cm de longitud total (LT, distribuidos aleatoriamente en 16 acuarios y sometidosdurante ocho semanas a los siguientes tratamientos: de control (T0: alimentación diaria;tratamiento 1 (T1: un día de ayuno y uno de alimentación; tratamiento 2 (T2:tres días de ayuno y dos días de alimentación, y tratamiento 3 (T3: dos días de ayunoy tres de alimentación. Se utilizó alimento de 35% de proteína, suministrado al 3%de la biomasa total dos veces al día. Al culminar el periodo experimental, los animalesexperimentales se anestesiaron y se les tomaron muestras de sangre para evaluar diferentesparámetros metabólicos y hormonales. Posteriormente, se sacrificaron, pesarony midieron; luego, se pesaron sus vísceras y una porción de músculo blanco se obtuvopara determinar el contenido de proteína y energía. Al final del ensayo, se calculó la sobrevivencia. Luego, de acuerdo con los resultados,se concluyó que no hubo diferencias significativas en la mayoría de los parámetrosanalizados, por lo que se infiere que los juveniles de cachama blanca son capaces deadaptarse metabólicamente a la carencia parcial de alimento y optimizar la respuesta en su desempeño.
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Menéndez, María C.; Piccolo, María C.; Hoffmeyer, Mónica S.
2012-10-01
The short-term dynamics of zooplankton in coastal ecosystems are strongly influenced by physical processes such as tides, riverine runoff and winds. In this study, we investigated the short-term changes of the representative taxa within mesozooplankton in relation to the semidiurnal tidal cycles. Also, we evaluated the influence of local winds on this short-term variability. Sampling was carried out bimonthly from December 2004 to April 2006 in a fixed point located in the inner zone of the Bahía Blanca Estuary, Argentina. Mesozooplankton samples were taken by pumps during 14-h tidal cycles at 3-h intervals, from surface and bottom. Vertical profiles of temperature and salinity as well as water samples to determine suspended particulate matter were acquired at each sampling date. All data concerning winds were obtained from a meteorological station and water level was recorded with a tide gauge. Holoplankton dominated numerically on meroplankton and adventitious fraction. Concerning holoplanktonic abundance, the highest values were attained by the calanoid copepods Acartia tonsa and Eurytemora americana. Meroplankton occurred mainly as barnacle larvae while benthic harpacticoids and Corophium sp. dominated the adventitious component. Semidiurnal tide was the main influence on the A. tonsa variability. However, noticeable differences in the abundance pattern as function of wind intensity were detected. Meroplankton abundance did not show a clear variation along the tidal cycle. Distributional pattern of harpacticoids seemed to be mainly modulated by velocity asymmetries in the tidal currents, in the same way as suspended particulate matter. However, the Corophium sp. distribution indicated probable behavioural responses associated with tides. The obtained results show how variable the mesozooplankton community structure can be over short-term time scales in mesotidal temperate estuaries. This variability should be taken into account for any zooplankton monitoring
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Cannon, Susan H.; Gartner, Joseph E.; Michael, John A.; Bauer, Mark A.; Stitt, Susan C.; Knifong, Donna L.; McNamara, Bernard J.; Roque, Yvonne M.
2007-01-01
INTRODUCTION The objective of this report is to present a preliminary emergency assessment of the potential for debris-flow generation from basins burned by the Ranch Fire in Ventura and Los Angeles Counties, southern California in 2007. Debris flows are among the most hazardous geologic phenomena; debris flows that followed wildfires in southern California in 2003 killed 16 people and caused tens of millions of dollars of property damage. A short period of even moderate rainfall on a burned watershed can lead to debris flows. Rainfall that is normally absorbed into hillslope soils can run off almost instantly after vegetation has been removed by wildfire. This causes much greater and more rapid runoff than is normal from creeks and drainage areas. Highly erodible soils in a burn scar allow flood waters to entrain large amounts of ash, mud, boulders, and unburned vegetation. Within the burned area and downstream, the force of rushing water, soil, and rock can destroy culverts, bridges, roadways, and buildings, potentially causing injury or death. This emergency debris-flow hazard assessment is presented as relative ranking of the predicted median volume of debris flows that can issue from basin outlets in response to 2.25 inches (57.15 mm) of rainfall over a 3-hour period. Such a storm has a 10-year return period. The calculation of debris flow volume is based on a multiple-regression statistical model that describes the median volume of material that can be expected from a recently burned basin as a function of the area burned at high and moderate severity, the basin area with slopes greater than or equal to 30 percent, and triggering storm rainfall. Cannon and others (2007) describe the methods used to generate the hazard maps. Identification of potential debris-flow hazards from burned drainage basins is necessary to issue warnings for specific basins, to make effective mitigation decisions, and to help plan evacuation timing and routes.
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78 FR 57463 - National Farm Safety and Health Week, 2013
2013-09-18
... agricultural producers and their families and communities to participate in comprehensive farm safety and... respect farming and ranching families by driving rural roadways with care, and I ask communities to... and ranches safer places to live, work, and raise families. NOW, THEREFORE, I, BARACK OBAMA, President...
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2013-11-19
...-diameter Diamond Valley Ranch Loop pipeline; (2) an approximately 22-foot-wide by 35-foot-long powerhouse... the 18-inch-diameter Diamond Valley Ranch Loop; and (4) appurtenant facilities. The proposed project..., canal, Y pipeline, aqueduct, flume, ditch, or similar manmade water conveyance that is operated for the...
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1984-01-24
GLOCAL CLIMATOLOGY 3RANCH LSAFETAC SURFACE WINDS 410 wrATHER SERVICE/MAC PERCENTAGE FREQUENCY OF WIND...oeux1I, . .p 4. A i € * GLOcAL CLIMATCLOGY RANCH L’AFETAC CEILING VERSUS VISIBILITY AIP ’-EATHFR SRVlCE/MAC 72(7Z_ PLATTSBURSH AFS NV 74-97 *A
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2010-10-07
... Commission Issuance of Materials License SUA-1596 for Uranium One Americas, Inc. Moore Ranch In Situ Recovery.... SUPPLEMENTARY INFORMATION: The Nuclear Regulatory Commission (NRC) has issued a license to Uranium One Americas, Inc. (Uranium One) for its Moore Ranch uranium in situ recovery (ISR) facility in Campbell County...
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2012-04-17
..., modification, and curtailment due to soil erosion and sedimentation during storm events. Also, we have found... Slaughter Ranch Museum, including Snail Spring, Horse Spring, Goat Tank Spring, and perhaps Tule Spring (Cox... to two springs on the John Slaughter Ranch Museum, Goat Tank Spring and Horse Spring (Martinez 2010...
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2010-04-01
Location: Project Number: COC Number: --- --- --- --- CAMBELL RANCH Receive Date: Sampling Date: Sample Depth: Sample Matrix: --- 02/22/2007 11:10 02/02...Manager: Indian Wells Valley Water [none] Mike Stoner Reported: 03/27/2007 11:18 BCL Sample ID: 0702234-10 Client Sample Name: CAMBELL RANCH, 2/2/2007
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Directory of Open Access Journals (Sweden)
Kris Havstad
2011-09-01
that afford the opportunity to obtain high (5 cm resolution data now required for rangeland monitoring. The Jornada team is now a leader in civil UAV applications in the USA. The scientific advances at the Jornada in fields such as remote sensing can be traced to the original Western America ranching culture that established the Jornada in 1912 and which persists as an important influence in shaping research directions today.
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Landowner total income from oak woodland working landscapes in Spain and California
Jose L. Oviedo; Lynn Huntsinger; Pablo Campos
2015-01-01
Conventional accounting of agricultural income focuses on the commercial operating income from oak woodland ranches, omitting the value of amenities to the landowner and real capital gains, which includes land revaluation (appreciation). These accounting exercises also mix income earned through self-employed (landowner and household) labor with ranch operating income,...
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Directory of Open Access Journals (Sweden)
Aragón Sandra
2008-08-01
Full Text Available
Para la toma adecuada de decisiones en el manejo de la mosca blanca de los invernaderos, se han propuesto diferentes criterios que buscan reducir el impacto producido por el uso indiscriminado de insecticidas. Sin embargo, estos criterios de decisión son aplicables principalmente al control químico de plagas y no se conoce su uso en programas de control biológico. Por lo tanto, con este trabajo se propuso generar unos criterios de decisión para el control biológico de la mosca blanca de los invernaderos T. vaporariorum con el parasitoide Encarsia formosa, teniendo en cuenta su respuesta funcional y porcentaje de control. En un diseño completamente al azar se ubicaron 18 plantas de tomate de 8 semanas de edad infestadas con 500 ninfas de mosca blanca y 3 plantas como control absoluto. En cada planta se liberaron 0, 10, 20, 30, 40 y 50 adultos de E. formosa, con tres repeticiones por densidad. Se registró el número de ninfas melanizadas por efectos del parasitismo de E. formosa a los 12; 19 y 26 días después de la primera liberación y, al finalizar la cosecha, se realizó un conteo de las ninfas de mosca blanca totales. Los resultados de este trabajo sugieren que para obtener un control cercano a 80% se debe liberar un parasitoide por cada 17 ninfas de mosca blanca de tercer instar, evaluando el control después de 35 días. Se pueden realizar nuevas liberaciones de E. formosa dirigidas al control de las nuevas ninfas encontradas en los muestreos periódicos del cultivo.
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Directory of Open Access Journals (Sweden)
Ana Vidal
2010-06-01
Full Text Available La última dictadura militar (1976-1983 implementó en Argentina un plan sistemático de desaparición de personas que tuvo entre sus objetivos centrales detener el desarrollo de los diversos proyectos políticos que venían encabezando algunos sectores de la izquierda en el país desde los años’60. Acaso uno de sus logros fundamentales haya sido, justamente, la clausura de los debates políticos y sociales que se habían iniciado en aquellas décadas, al punto que, pasados ya más de treinta años del golpe militar, los procesos de construcción de la memoria colectiva sobre el pasado reciente en Argentina aún dan cuenta de las dificultades existentes para elaborar representaciones que recuperen la complejidad de aquellas experiencias, y permitan, desde allí, comprender los rasgos y motivaciones de la operatoria represiva que buscó destruirlas.En este trabajo se analizan dichos procesos de rememoración colectiva a través del estudio de un caso concreto: las producciones de un conjunto de allegados y familiares a las víctimas de la represión en la ciudad de Bahía Blanca (1995-2009 quienes, apelando a recursos, espacios y técnicas de las artes visuales y escénicas, elaboraron y difundieron visiones particulares respecto de aquel período.
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Directory of Open Access Journals (Sweden)
Oscar García
2013-12-01
Full Text Available La cachama blanca (Piaractus brachypomus es una especie económicamente importante en la acuicultura continental de América Latina y una alternativa nacional de producción de pescado para la piscicultura, la industria y el consumo. El objetivo del presente trabajo de investigación fue caracterizar mediante análisis proximal, evaluación microbiológica y sensorial, carnes para hamburguesas elaboradas con pulpa de cachama y diferentes inclusiones porcentuales de harina de soya texturizada (HST (0, 3, 6 y 9 %. Se realizó análisis proximal a las carnes crudas y cocidas, se evaluó microbiológicamente a las crudas y sensorialmente las cocidas con 100 consumidores. En las carnes para hamburguesas a mayor adición de HST favoreció la retención de agua durante la cocción y se elevó el contenido de proteína, grasa y cenizas en las carnes crudas y cocidas (p < 0,05. El análisis microbiológico reveló inocuidad alimentaria en las carnes para hamburguesas crudas, encontrándose todos los valores por debajo de lo establecido en la norma venezolana COVENIN 2127-1998 para hamburguesa y otras normas de referencia. La blandura aumentó de manera proporcional al incremento porcentual en la inclusión de HST y las formulaciones con 0, 3 y 6 % de HST se diferenciaron significativamente (p < 0,05 de la formulación con 9 %. La apariencia de las carnes de hamburguesa agradó más en las formulaciones 6 y 9 %, la blandura en 9 %, y el sabor en el control (0 %, seguido de 3 %. Algunos consumidores hicieron asociaciones de sabor a carne de pollo, mariscos y hervidos de pollo.
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Portfolio selection theory and wildlife management
Directory of Open Access Journals (Sweden)
JW Hearne
2008-12-01
Full Text Available With a strong commercial incentive driving the increase in game ranching in Southern Africa the need has come for more advanced management tools. In this paper the potential of Portfolio Selection Theory to determine the optimal mix of species on game ranches is explored. Land, or the food it produces, is a resource available to invest. We consider species as investment choices. Each species has its own return and risk profile. The question arises as to what proportion of the resource available should be invested in each species. We show that if the objective is to minimise risk for a given return, then the problem is analogous to the Portfolio Selection Problem. The method is then implemented for a typical game ranch. We show that besides risk and return objectives, it is necessary to include an additional objective so as to ensure sufficient species to maintain the character of a game ranch. Some other points of difference from the classical Portfolio Selection problem are also highlighted and discussed.
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International Nuclear Information System (INIS)
Luo, S.; Ku, T.L.; Todd, V.; Murrell, M.; Pineda, J. Alfredo Rodriguez; Dinsmoor, J.; Mitchell, A.
2005-01-01
For nuclear waste management, an important mechanism by which radioactive waste components are isolated from returning to the human environment, the biosphere, is by the geological barrier in which the effectiveness of the barrier is characterized by in-situ retardation factor, i.e., the transport rate of a radionuclide relative to that of groundwater. As part of natural analog studies of the Yucca Mountain Project of the U. S. Department of Energy, we propose such characterization by using naturally-occurring decay-series radioisotopes as an analog. We collected large-volume (>1000 liters) groundwater samples from three wells (PB, Pozos, and PB4, respectively) near the Nopal I Uranium Ore site at Pena Blanca, Mexico, by using an in-situ Mn-cartridge filtration technique for analysis of short-lived decay-series radionuclides. Results show that the activities of short-lived radioisotopes ( 228 Ra, 224 Ra and 223 Ra) and activity ratios of 224 Ra/ 228 Ra and 224 Ra/ 223 Ra are higher at PB and Pozos than at PB4. In contrast, the 210 Po activity is much lower at PB and Pozos than at PB4. The high Ra activities and activities ratios at PB and Pozos are attributable to the high alpha-recoil input from the aquifer rocks, while the high 210 Po activity at PB4 is due to the enhanced colloidal transport. Based on a uranium-series transport model, we estimate that the in-situ retardation factor of Ra is (0.43 ± 0.02) x 10 3 at PB, (1.68 ± 0.08) x 10 3 at Pozos, and (1.19 ± 0.08) x 10 3 at PB4 and that the mean fracture width in the aquifer rocks is about 0.23 (micro)m at PB, 0.37 (micro)m at Posos, and 4.0 (micro)m at PB4, respectively. The large fracture width at PB4 as derived from the model provides an additional evidence to the inference from the Po measurements that particle-reactive radionuclides are transported mainly as colloidal forms through the large fractures in rocks. Our model also suggests that in addition to alpha recoil, decay of 226 Ra from the adsorbed
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76 FR 32184 - Combined Notice of Filings #1
2011-06-03
.... Applicants: Golden Spread Panhandle Wind Ranch, LLC. Description: Golden Spread Panhandle Wind Ranch, LLC....13(a)(2)(iii): MidAmerican-MEAN Waverly WDS SA2164 to be effective 6/1/2011. Filed Date: 05/27/2011....13(a)(2)(iii): MidAmerican-MEAN Breda WDS SA2340 to be effective 6/1/2011. Filed Date: 05/27/2011...
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Objective of this study was to evaluate failure (loss or inability to read) of radio frequency identification (RFID) ear tags in beef cows over a 2 to 5 year period under ranching conditions. One of 5 types of RFID tags was applied in the ear of a total of 4316 cows on 4 separate ranches. Tags wer...
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Jacobs, Caitlin E; Main, Martin B
2015-01-01
Calf (Bos taurus) depredation by the federally endangered Florida panther (Puma concolor coryi) on ranches in southwest Florida is an important issue because ranches represent mixed landscapes that provide habitat critical to panther recovery. The objectives of this study were to (1) quantify calf depredation by panthers on two ranches in southwest Florida, and (2) develop a habitat suitability model to evaluate the quality of panther hunting habitat on ranchlands, assess whether the model could predict predation risk to calves, and discuss its potential to be incorporated into an incentive-based compensation program. We ear-tagged 409 calves with VHF transmitters on two ranches during 2011-2013 to document calf mortality. We developed a model to evaluate the quality of panther hunting habitat on private lands in southwest Florida using environmental variables obtained from the Florida Natural Areas Inventory (FNAI) Cooperative Landcover Database and nocturnal GPS locations of panthers provided by the Florida Fish and Wildlife Conservation Commission (FWC). We then tested whether the model could predict the location of calf depredation sites. Tagged calf loss to panthers varied between the two ranches (0.5%/yr to 5.3%/yr) and may have been influenced by the amount of panther hunting habitat on each ranch as the ranch that experienced higher depredation rates contained a significantly higher probability of panther presence. Depredation sites of tagged calves had a significantly greater probability of panther presence than depredation sites of untagged calves that were found by ranchers in open pastures. This suggests that there may be more calves killed in high risk environments than are being found and reported by ranchers and that panthers can hunt effectively in open environments. It also suggests that the model may provide a means for evaluating the quality of panther hunting habitat and the corresponding risk of depredation to livestock across the landscape. We
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Directory of Open Access Journals (Sweden)
Caitlin E Jacobs
Full Text Available Calf (Bos taurus depredation by the federally endangered Florida panther (Puma concolor coryi on ranches in southwest Florida is an important issue because ranches represent mixed landscapes that provide habitat critical to panther recovery. The objectives of this study were to (1 quantify calf depredation by panthers on two ranches in southwest Florida, and (2 develop a habitat suitability model to evaluate the quality of panther hunting habitat on ranchlands, assess whether the model could predict predation risk to calves, and discuss its potential to be incorporated into an incentive-based compensation program. We ear-tagged 409 calves with VHF transmitters on two ranches during 2011-2013 to document calf mortality. We developed a model to evaluate the quality of panther hunting habitat on private lands in southwest Florida using environmental variables obtained from the Florida Natural Areas Inventory (FNAI Cooperative Landcover Database and nocturnal GPS locations of panthers provided by the Florida Fish and Wildlife Conservation Commission (FWC. We then tested whether the model could predict the location of calf depredation sites. Tagged calf loss to panthers varied between the two ranches (0.5%/yr to 5.3%/yr and may have been influenced by the amount of panther hunting habitat on each ranch as the ranch that experienced higher depredation rates contained a significantly higher probability of panther presence. Depredation sites of tagged calves had a significantly greater probability of panther presence than depredation sites of untagged calves that were found by ranchers in open pastures. This suggests that there may be more calves killed in high risk environments than are being found and reported by ranchers and that panthers can hunt effectively in open environments. It also suggests that the model may provide a means for evaluating the quality of panther hunting habitat and the corresponding risk of depredation to livestock across the
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Directory of Open Access Journals (Sweden)
Cincunegui, Carmen
2012-02-01
Full Text Available Since the 1980s, under a post-fordism scenery an “imagery” has been developed that represents regions as carriers of an opportunity for being more flexible and innovative than large national units. It has been emphasized also that foreign investments have an impact on innovation initiatives when an articulated social, economic and institutional context open to novelty and change exists. Regions, therefore, abandoned their position as “objects” of development to become “subjects” in charge of their own territorial development process. Under this new perspective, this article presents results of a study on innovation and territorial development in peripheral industrial agglomerations. This research analyses in the case of Bahía Blanca’s Petrochemical Pole. Investigates whether large enterprises activities have promoted territory’s competitiveness by pushing the advantages of proximity and located interaction.
Bajo un escenario postfordista, se ha desarrollado desde la década de 1980 un “imaginario” que presenta a las regiones como portadoras de la oportunidad de actuar en forma más flexible e innovadora que las grandes unidades nacionales. Se ha enfatizado también el impacto de las inversiones extranjeras para el surgimiento de iniciativas innovadoras, siempre que exista un entorno social, económico e institucional articulado y receptivo a la novedad y al cambio. Así las regiones abandonan su pretérita situación de “objetos” de desarrollo para colocarse como “sujetos” encargados de reemprender su proceso de desarrollo territorial. Considerando este nuevo enfoque, el artículo expone los resultados de una investigación sobre innovación y desarrollo territorial en aglomeraciones industriales periféricas y analiza, para el caso del Polo Petroquímico de Bahía Blanca, si la actuación de las grandes empresas del Polo ha propiciado la competitividad del territorio al impulsar las ventajas de la proximidad -
Directory of Open Access Journals (Sweden)
Betancourth G. Carlos
2008-12-01
Full Text Available
El presente trabajo se realizó en el municipio de Pasto, departamento de Nariño, Colombia, a 2.710 msnm. El objetivo fue evaluar la reacción de los clones de papa Blanca, Pintada, Rosada tipo Capiro, Roja Guata, Roja Redonda y Roja Loca y tres variedades mejoradas: Parda Suprema, Roja Nariño y Betina, al ataque de la gota (Phytophthora infestans. Se utilizó un diseño de bloques al azar con cuatro repeticiones y nueve tratamientos. Para la variable severidad los mejores genotipos fueron Blanca, Pintada, Parda Suprema y Betina con un promedio de 19,72; 21,99; 23,15 y 23,62%, respectivamente. El mejor rendimiento fue obtenido por los genotipos Blanca, Pintada, Parda Suprema, Betina y Roja Loca con 29,61; 24,66; 25,71; 27,12 y 28,05 t•ha-1, en su orden.
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Pingitore, N. E., Jr.; Clague, J. W.; Gorski, D.
2014-12-01
The Round Top Mountain peraluminous rhyolite, exposed at the surface in Sierra Blanca, Hudspeth County, west Texas, USA, is enriched in yttrium and heavy rare earth elements (YHREEs). Other potentially valuable elements in the deposit include Be, Li, U, Th, Sn, F, Nb, and Ta. Texas Rare Earth Resources Corp. proposes to extract the YHREEs from the host mineral variety yttrofluorite by inexpensive heap leaching with dilute sulfuric acid, which also releases some of the Be, Li, U, F, and Th from other soluble minor minerals. Data: Feldspars and quartz comprise 90-95% of the rhyolite, with pheonocrysts of up to 250 microns set in an aphanitic matrix that hosts the typically sub-micron target yttrofluorite. Reverse circulation cuttings from some 100 drill holes, two drill cores, and outcrop and trench observations suggest striking physical homogeneity through this billion-plus ton surface-exposed laccolith, about 1200 feet high and a mile in diameter (375 x 1600 m). Gray to pink, and other minor hues, color variation derives from magnetite—hematite redox reaction. Plots of Y, 13 REEs, U, Th, and Nb analyses from over 1500 samples collected from 64 drill holes (color codes in figure) exhibit remarkably little variation in the concentration of these elements with geographic position or depth within the laccolith. Importance: Uniform mineralization grades help insure against the mining production surprises often associated with vein deposits and heterogeneous open pit deposits. At Round Top, mine feedstock can be relatively constant over the life of the mine (multiple decades), so the mechanical mining process can be optimized early on and not need expensive alterations later. Likewise, the chemical and physical parameters of the heap leach can be perfected. The sensitive and expensive process of extraction of elements and element groups from the pregnant leach solution and purification also can be optimized. Origin: The remarkable homogeneity of the YHREE distribution
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Directory of Open Access Journals (Sweden)
Meregildo Silva Ramirez
2010-01-01
Full Text Available La presente investigación tuvo por objetivo determinar la influencia del nivel de turbidez en el efecto antimicrobiano de la luz ultravioleta y luz blanca en néctar de naranja (Citrus sinensis L.. Dicha investigación fue realizada en una cámara de tratamiento de luz UVC con paredes de espejo y una lámpara de luz ultravioleta de 15 watts. El néctar, sometido a un proceso de pasteurización (90 °C, 10 minutos, se inoculó con levadura liofilizada (Saccharomyces cerevisiae, cepa MIT L51, hasta concentraciones de 1.0; 0.1 y 0.01 % (p/p y se determinó la turbidez de las diluciones, reportando valores de turbidez de 10564, 1304 y 813 UTN respectivamente. Las muestras fueron expuestas a tres diferentes dosis, 0.57; 1.14 y 1.71 J/cm2, tomando una muestra testigo denominada “0” minutos, para efectos de análisis inicial de microorganismos. Posteriormente a la aplicación del tratamiento se realizó el recuento en placas, en medio agar Sabouraud. Obtenidos los datos en la lectura de las colonias resultantes se determinó la tasa de supervivencia en cada tratamiento y el valor de la constante de reducción decimal “D” en J/cm2. Dichos datos mostraron que la turbidez, debido a los sólidos disueltos, influencia adversamente la actividad antimicrobiana de la luz UVC. Se concluye que la actividad antimicrobiana expresada en términos de la constante de reducción decimal “D”, bajo las condiciones de tratamiento en el néctar de naranja, depende directamente de la turbidez e indirectamente del la energía total transmitida.
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Cenizas del tamo de arroz como substituto del feldespato en la fabricación de cerámica blanca
Directory of Open Access Journals (Sweden)
Amigó B, Vicente
2013-02-01
Full Text Available The substitution of raw materials for processing high energy consumption materials by agricultural and agro-industrial wastes causes a positive impacts on the environment preservation. One of these residues is rice straw, which according to FAO estimation, its annual production is about 600 million tons. In this research was studied the use of rice straw ash (RSA as substitute of the use of feldspar in the whiteware production. Clay-feldspar-quartz porcelains are referred to as triaxial whiteware. Specimens of semidry triaxial mixtures, where feldspar was substituted for different percentages of CTA, were prepared by uniaxial pressing, followed by drying and sintering. Physical and mechanical properties of sintered bodies were evaluated. The porosity and the compressive strength of the fired pieces do increase with additions of up to 75% of CTA in substitution of feldspar. Their mineralogical phases were determined by DRX and SEM; grains of quartz, and needles of primary and secondary mullite were identified in a vitreous phase. It was concluded that feldspar can be substituted positively by CTA in whiteware pastes.
La sustitución de materias primas para procesamiento de materiales -de alto consumo energético- por residuos agrícolas y agroindustriales impacta positivamente el medio ambiente. Uno de estos residuos es la paja o tamo de arroz, del cual la FAO estima que su disponibilidad mundial ronda los 600 millones de toneladas por año. En éste artículo se presentan los resultados de una investigación sobre la utilización de una ceniza de tamo o paja de arroz (CTA como substituto del feldespato en la fabricación de cerámica blanca de tipo triaxial. Se prepararon mezclas donde la ceniza sustituyó al feldespato en volúmenes distintos. Especímenes de las pastas obtenidas fueron moldeados, secados, y cocidos. Se evaluaron las propiedades físicas y mecánicas de las cerámicas cocidas. La porosidad y la resistencia a la compresi -
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Yacenia Morillo Coronado
2010-01-01
Full Text Available Se utilizaron 19 marcadores microsatélites para caracterizar 34 accesiones de naranja Citrus sinensis L. Osbeck del Banco de Germoplasma de la Corporación Colombiana de Investigación Agropecuaria (Corpoica-Palmira. Seis marcadores fueron polimórficos, los de mayor heterocigosidad fueron CCSM- 19 (0.4097 y CCSM-3 (0.3254. Se diferenciaron 33 accesiones y al 85% de similitud, con el índice de Nei-Li y el método de agrupamiento UPGMA, se conformaron cuatro grupos. En el primero se situaron dos accesiones blancas (Lerma y Valencia Olinda 2, en el segundo la mayoría de las blancas (Indian River, Valencia Olinda, Wialua, Lima Dulce, Pera del Río, St. Michael, Enterprise, Cafetera No. 1 junto con García Valencia y Navel (Lane Late, Valle Washington, New Hall y dos sanguinas (Rudy Blood, Moro Blood, en el tercero accesiones blancas (Joppa, Salerma, Cuban Queen, Rico, Galicia, Star Calyx, Valencia Cutter, Valencia Frost, Valencia Campbell y Valencia Variegado y una sola accesión sanguina (Morocco Blood. En el cuarto grupo se situaron dos accesiones blancas, (Jaffa y Valencia 1-D-E. Finalmente, la variedad Sanguinella no hizo parte de grupos. Con los marcadores microsatélites no se encontró relación entre los grupos genéticos, formación y las características morfológicas del grupo.
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Directory of Open Access Journals (Sweden)
Morillo Coronado Yacenia
2010-03-01
Full Text Available Se utilizaron 19 marcadores microsatélites para caracterizar 34 accesiones de naranja Citrus sinensis L. Osbeck del Banco de Germoplasma de la Corporación Colombiana de Investigación Agropecuaria (Corpoica-Palmira. Seis marcadores fueron polimórficos, los de mayor heterocigosidad fueron CCSM- 19 (0.4097 y CCSM-3 (0.3254. Se diferenciaron 33 accesiones y al 85% de similitud, con el índice de Nei-Li y el método de agrupamiento UPGMA, se conformaron cuatro grupos. En el primero se situaron dos accesiones blancas (Lerma y Valencia Olinda 2, en el segundo la mayoría de las blancas (Indian River, Valencia Olinda, Wialua, Lima Dulce, Pera del Río, St. Michael, Enterprise, Cafetera No. 1 junto con García Valencia y Navel (Lane Late, Valle Washington, New Hall y dos sanguinas (Rudy Blood, Moro Blood, en el tercero accesiones blancas (Joppa, Salerma, Cuban Queen, Rico, Galicia, Star Calyx, Valencia Cutter, Valencia Frost, Valencia Campbell y Valencia Variegado y una sola accesión sanguina (Morocco Blood. En el cuarto grupo se situaron dos accesiones blancas, (Jaffa y Valencia 1-D-E. Finalmente, la variedad Sanguinella no hizo parte de grupos. Con los marcadores microsatélites no se encontró relación entre los grupos genéticos, formación y las características morfológicas del grupo.
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Transhumant Ranchers in California
Sulak, A.; Forero, L.; Huntsinger, L.
2009-04-01
There is a strong link between some of the richest, most productive lands of the western United States, including California's oak woodlands, and the traditional "transhumance" of ranchers using public ranges. Oak woodland ranchers with government grazing leases report that about half of their income stems from using government -owned montane ranges. For many, loss of these leases reduces their ranch productive capacity to a level insufficient for sustainability, augmenting the sale of ranch lands for development. Many thousands of hectares of oak woodlands are linked to the fate of government leases in this way, and this linkage limits the opportunities for conservation of oak woodlands as "working landscapes" via conservation easements. This type of conservation is the fastest growing type in California today. The first case study shows that over the past 100 years there has been a reduction in access to the natural resources needed for transhumance from three sources: competition from use of the pastures for recreation and nature preservation, management practices that have brought about change in the character of the natural resources themselves, and urban sprawl. Ranchers are leasing other properties, purchasing feed, and transporting animals to other regions to compensate. Most had increased their privately leased land over the previous five years. Though they desire to stay on their ranches, transhumant ranching is becoming increasingly difficult because of land use changes on both public and private lands and a third of ranchers believe that they may need to sell the property for development if they lose their summer permits. There are many "line camps" on Forest Service range—cabins that families or workers would stay in during the summer to tend the cattle. However, the need to support the ranch with work in town limits the ability of the household to participate in transhumance or even travel into the mountains to check on the animals. For ranching to
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Cancer in US Air Force veterans not involved with spraying herbicides during the Vietnam War
Energy Technology Data Exchange (ETDEWEB)
Pavuk, M. [SpecPro, Inc. (United States); Michalek, J.; Ketchum, N. [Air Force Research Laboratory, San Antonio, TX (United States); Akhtar, F. [The START Center, San Antonio, TX (United States)
2004-09-15
The Air Force Health Study is a 20-year prospective study examining the health, mortality and reproductive outcomes in US Air Force veterans of Operation Ranch Hand who sprayed herbicides in Vietnam from 1962 to 1971. Comparison veterans flew or serviced C-130 transport aircraft in Southeast Asia (SEA) during the same time period but did not spray herbicides. They were stationed mostly in Taiwan, the Philippines, Guam, Japan, and Thailand and spent on average less than 30% of their SEA service in Vietnam. Comparison veterans also spent approximately 30% more time in SEA than Ranch Hand veterans. No increases in Ranch Hand cancer mortality and morbidity were found in earlier investigations, but a recent study contrasting cancer rates in Air Force veterans and in the general US (white male) population reported increases in cancer at all SEER sites, prostate cancer and melanoma in Ranch Hand veterans and cancer at all SEER sites and prostate cancer in Comparison veterans. Associations between dioxin exposure category and cancer were found after restriction to Ranch Hand veterans who served in SEA no more than 2 years and to those who spent all of their SEA service in Vietnam. Overall cancer incidence in the general population in countries of SEA is about half of that in the United States, but cancers of the oral cavity/nasopharynx and liver are more prevalent in this region. Here we examine in more detail whether years served in SEA had any effect on the risk of cancer among Comparison veterans.
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José Ader Gómez-Peñaranda
2013-12-01
Full Text Available Este estudio estima el tiempo de vaciado del estómago de la cachama blanca (Piaractus brachypomus en el día de comienzo regular de alimentación posterior a un periodo de ayuno. Para el efecto, se recolectaron muestras de contenido estomacal en periodos de dos horas después del suministro de alimento (9:30 y 15:30 h hasta el primer indicio de vaciado. Se utilizaron cachamas con un peso de 360 ± 12 g dispuestas en cuatro tratamientos: (1 T1 = alimentación a saciedad durante 5 días y ayuno de 2 días, (2 T2 = alimentación a saciedad durante 6 días y ayuno de 1 día, (3 T3 = alimentación a saciedad durante 7 días, y (4 TC = alimentación siguiendo las tablas recomendadas por el fabricante del alimento. El análisis de datos se realizó mediante ANOVA de medidas repetidas, empleando como factores el tratamiento y el tiempo de vaciado, siendo cada repetición la unidad experimental. Las cachamas del tratamiento T1 presentaron mayor cantidad de alimento en el estómago en los muestreos posteriores al suministro de la primera y segunda ración. A diferencia del tratamiento T1, en los demás las cachamas vaciaron su contenido en el estómago en el periodo comprendido entre la primera y la segunda ración de alimentación y en el periodo posterior a la segunda ración. Por tanto, cuando el contenido estomacal fue mayor, debido a un mayor consumo de alimento en la ración, como en el caso del tratamiento (T1, el tiempo necesario para vaciar el estómago de las cachamas se incrementó.
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Energy Technology Data Exchange (ETDEWEB)
S. Luo; T.L. Ku; V. Todd; M. Murrell; J. Alfredo Rodriguez Pineda; J. Dinsmoor; A. Mitchell
2005-07-11
For nuclear waste management, an important mechanism by which radioactive waste components are isolated from returning to the human environment, the biosphere, is by the geological barrier in which the effectiveness of the barrier is characterized by in-situ retardation factor, i.e., the transport rate of a radionuclide relative to that of groundwater. As part of natural analog studies of the Yucca Mountain Project of the U. S. Department of Energy, we propose such characterization by using naturally-occurring decay-series radioisotopes as an analog. We collected large-volume (>1000 liters) groundwater samples from three wells (PB, Pozos, and PB4, respectively) near the Nopal I Uranium Ore site at Pena Blanca, Mexico, by using an in-situ Mn-cartridge filtration technique for analysis of short-lived decay-series radionuclides. Results show that the activities of short-lived radioisotopes ({sup 228}Ra, {sup 224}Ra and {sup 223}Ra) and activity ratios of {sup 224}Ra/{sup 228}Ra and {sup 224}Ra/{sup 223}Ra are higher at PB and Pozos than at PB4. In contrast, the {sup 210}Po activity is much lower at PB and Pozos than at PB4. The high Ra activities and activities ratios at PB and Pozos are attributable to the high alpha-recoil input from the aquifer rocks, while the high {sup 210}Po activity at PB4 is due to the enhanced colloidal transport. Based on a uranium-series transport model, we estimate that the in-situ retardation factor of Ra is (0.43 {+-} 0.02) x 10{sup 3} at PB, (1.68 {+-} 0.08) x 10{sup 3} at Pozos, and (1.19 {+-} 0.08) x 10{sup 3} at PB4 and that the mean fracture width in the aquifer rocks is about 0.23 {micro}m at PB, 0.37 {micro}m at Posos, and 4.0 {micro}m at PB4, respectively. The large fracture width at PB4 as derived from the model provides an additional evidence to the inference from the Po measurements that particle-reactive radionuclides are transported mainly as colloidal forms through the large fractures in rocks. Our model also suggests that
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The Element Analysis on The Development of Cattle Industry in Jambi
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Sumarsono Sumarsono
2016-06-01
Full Text Available The aim of this study is to formulate the structure of the key elements and determine the development of beef cattle livestock industry system that must be done. The method used is ISM and Fuzzy ME-MCDM.. Results of the ISM data analysis can know that the key element to the needs of the program is the production technology, quality standardization Ranch Cattle, capital, and competent employees. The constraint of program : capital, facilities, infrastructure, quality, human resources, technology, and institutional. For the purpose of the program is to improve the mastery of technology, increase the added value Ranch Cattle, improving competent human resources, and economic development of Ranch Beef Cattle Industry. The results is alternative activities that must be done is the development of systems Industrial raw materials and production process.
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María del Milagro Granados
2005-01-01
Full Text Available Se aislaron e identificaron hongos asociados a esclerocios de Sclerotium cepivorum, causante de la pudrición blanca de la cebolla, con el fin de determinar la existencia de hongos con potencial antagónico nativos en la zona alta de Cartago. Se estudiaron 10 fincas durante febrero-mayo de 2002. Cada una se dividió en 3 áreas de acuerdo al nivel de incidencia histórica de la enfermedad (bajo, intermedio, alto. En cada área se realizó un trampeo de hongos mediante la técnica de entierro de esclerocios; además se hizo muestreo de plantas enfermas, se colectó suelo para cuantificar densidad de inóculo y para realizar análisis microbiológicos, químico sencillo, de textura y determinación de materia orgánica. Los géneros encontrados en el trampeo fueron Alternaria spp., Fusarium spp., Gliocladium sp., Mucor sp., Penicillium spp., Rhizoctonia sp., Rhizopus sp. y Trichoderma spp.; en bulbos enfermos se aislaron Fusarium spp., Monilia sp., Mucor sp., Penicillium spp., Pythium sp., Rhizopus sp., y Trichoderma spp. Los géneros Gliocladium sp., Penicillium spp. y Trichoderma spp. también se hallaron en el análisis microbiológico de suelo. Las poblaciones más altas de microorganismos se recuperaron en el área intermedia de todas las fincas. Este trabajo comprueba que es posible aislar hongos con potencial antagónico, como Trichoderma spp., Gliocladium sp. y Paecilomyces sp., en suelos a los que por muchos años se les ha aplicado una gran cantidad de fungicidas.
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Harris, R.; Reimus, P. W.; Ware, D.; Williams, K.; Chu, D.; Perkins, G.; Migdissov, A. A.; Bonwell, C.
2017-12-01
Uranium is primarily mined for nuclear power production using an aqueous extraction technique called in-situ recovery (ISR). ISR can pollute groundwater with residual uranium and other heavy metals. Reverse osmosis and groundwater sweep are currently used to restore groundwater after ISR mining, but are not permanent solutions. Sodium dithionite is being tested as part of a method to more permanently restore groundwater after ISR mining at the Smith-Ranch Highland site in Wyoming. Sodium dithionite is a chemical reductant that can reduce sediments that were oxidized during ISR. The reduced sediments can reduce soluble uranium (VI) in the groundwater to insoluble uranium (IV). Laboratory studies that use sodium dithionite to treat sediments and waters from the site may help predict how it will behave during a field deployment. An aqueous batch experiment showed that sodium dithionite reduced uranium in post-mined untreated groundwater from 38 ppm to less than 1 ppm after 1 day. A sediment reduction batch experiment showed that sodium dithionite-treated sediments were capable of reducing uranium in post-mined untreated groundwater from 38 ppm to 2 ppm after 7 days. One column experiment is showing post-mined sodium dithionite-treated sediments are capable of reducing uranium in post-mined groundwater for over 30 pore volumes past the initial injection. While these results are promising for field deployments of sodium dithionite, another column experiment with sodium dithionite-treated sediments containing uranium rich organic matter is showing net production of uranium instead of uranium uptake. Sodium dithionite appears to liberate uranium from the organic matter. Another sediment reduction experiment is being conducted to further investigate this hypothesis. These experiments are helping guide plans for field deployments of sodium dithionite at uranium ISR mining sites.
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Blair Ortiz
2011-03-01
Presentamos un paciente con holoprosencefalia semilobar en quien la imagen potenciada en difusión y la tractografía demostró falla de la inducción ventral del prosencéfalo y fusión anormal de varios fascículos de la sustancia blanca en el cerebro y en el tallo encefálico. De esta forma, las anormalidades de los fascículos de la sustancia blanca en casos de holoprosencefalia se pueden identificar por medio de las imágenes potenciadas en difusión y tractografía fasciculografía.
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International Nuclear Information System (INIS)
Cardozo, H.; Solari, M.A.; Etchebarne, J.; Larrauri, J.H.
1998-01-01
Bovine blood samples were collected from a region endemic for Boophilus microplus and consisting of 125 ranches with a cattle population of 76,918. A total of 1,728 cattle were bled (1,485 adults and 243 calves less from 1 year of age) from 27 ranches. This sample size was determined to provide incidence and prevalence values with a precision of ±10% at a confidence level of 95%. The FAO/IAEA ELISA kit was used to detect antibody to Babesia bovis. Dispersion (proportion of ranches with babesia infection) was estimated to be 70.5% ± 8.8 (SD). A positive ranch was defined as having one or more test-positive animals. Apparent prevalence (proportion of cattle with a positive test result) within the region was estimated to be 3.5% ± 0.3, with a range from 0 to 18.5%. Incidence based on apparent prevalence in calves less than 1 year of age was estimated to be 2.8%. The dispersion, apparent prevalence, and incidence data for this region of Uruguay will be compared through a repeated sampling of cattle in this area during a three-year period to assess the effectiveness of the eradication/control campaign. (author)
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Cancer in US Air Force veterans of the Vietnam War.
Akhtar, Fatema Z; Garabrant, David H; Ketchum, Norma S; Michalek, Joel E
2004-02-01
Cancer incidence and mortality were summarized in Air Force veterans of the Vietnam War. The index subjects were Operation Ranch Hand veterans who sprayed 2,3,7,8 tetrachlorodibenzo-p-dioxin (dioxin)-contaminated herbicides in Vietnam. Comparisons served in Southeast Asia during the same period but did not spray herbicides. We assessed cancer incidence and mortality using national rates and contrasted cancer risk in each of three Ranch Hand dioxin exposure categories relative to comparisons. The incidence of melanoma and prostate cancer was increased among white Ranch Hand veterans relative to national rates. Among veterans who spent at most 2 years in Southeast Asia, the risk of cancer at any site, of prostate cancer and of melanoma was increased in the highest dioxin exposure category. These results appear consistent with an association between cancer and dioxin exposure.
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Williams, Randolph; Goodwin, Laurel; Sharp, Warren; Mozley, Peter
2017-04-01
U-Th dates on calcite precipitated in coseismic extension fractures in the Loma Blanca normal fault zone, Rio Grande rift, NM, USA, constrain earthquake recurrence intervals from 150-565 ka. This is the longest direct record of seismicity documented for a fault in any tectonic environment. Combined U-Th and stable isotope analyses of these calcite veins define 13 distinct earthquake events. These data show that for more than 400 ka the Loma Blanca fault produced earthquakes with a mean recurrence interval of 40 ± 7 ka. The coefficient of variation for these events is 0.40, indicating strongly periodic seismicity consistent with a time-dependent model of earthquake recurrence. Stochastic statistical analyses further validate the inference that earthquake behavior on the Loma Blanca was time-dependent. The time-dependent nature of these earthquakes suggests that the seismic cycle was fundamentally controlled by a stress renewal process. However, this periodic cycle was punctuated by an episode of clustered seismicity at 430 ka. Recurrence intervals within the earthquake cluster were as low as 5-11 ka. Breccia veins formed during this episode exhibit carbon isotope signatures consistent with having formed through pronounced degassing of a CO2 charged brine during post-failure, fault-localized fluid migration. The 40 ka periodicity of the long-term earthquake record of the Loma Blanca fault is similar in magnitude to recurrence intervals documented through paleoseismic studies of other normal faults in the Rio Grande rift and Basin and Range Province. We propose that it represents a background rate of failure in intraplate extension. The short-term, clustered seismicity that occurred on the fault records an interruption of the stress renewal process, likely by elevated fluid pressure in deeper structural levels of the fault, consistent with fault-valve behavior. The relationship between recurrence interval and inferred fluid degassing suggests that pore fluid pressure
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Son los latinos estadounidenses?
Aguirre, Mariano
2009-01-01
En el año 2050 la población blanca no latina de Estados Unidos sumará el 46% del total de los ciudadanos de ese país. Para entonces, la población latina, negra y asiática combinada representará el 54%. En ese horizonte que predicen los cálculos oficiales, los latinos habrán crecido en un 15%, pasando de los 47 millones que viven ahora EEUU a 133 millones. Mientras que los latinos y los asiáticos (de 16 millones a 41 millones para entonces) no pararán de crecer, las poblaciones blanca y negra ...
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De las andanzas de una poeta con mirada de pintor
Suarez, Modesta
2007-01-01
Referirse a la poesía de Blanca Varela supone, a la vez que un acercamiento a una de las poetas latinoamericanas más personales de esta segunda mitad del siglo XX, adentrarnos en una generación, si no un grupo de poetas y creadores peruanos que han marcado el siglo. Pero, con razón, puede apuntarse la discreción que siempre marcó la publicación de sus poemarios, hasta los años 80:Blanca Varela, como Westphalen y Moro, está entre estos poetas que los lectores esperan muchos años después de esc...
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Directory of Open Access Journals (Sweden)
R. Collazo-Carceller
2009-05-01
Full Text Available Se determina la influencia de los parámetros Energía introducida (Hi, Número de capas (Nc yAncho del depósito (Ad, en la morfología y el incremento de la resistencia al desgaste abrasivo decapas depositadas sobre acero 1020 utilizando el electrodo de fundición blanca al cromo UTPLedurit – 61. Empleando la microscopia óptica se identificaron y cuantificaron las fases presentes,analizando su efecto en el desgaste. Siendo determinante la influencia de la inclinación de lasdendritas y su posición con respecto a 90° en el incremento de la resistencia al desgaste abrasivo.Se caracterizaron los posibles mecanismos de daño superficial provocado por desgaste abrasivoempleando la microscopia electrónica de barrido. Se propusieron modelos lineales paracorrelacionar la influencia de la cantidad, tamaño, dispersión de los carburos y el ángulo deinclinación de las dendritas, en el incremento de la resistencia al desgaste.Palabras claves: morfología, desgaste abrasivo, parámetros de soldadura, dendritas, modelos.__________________________________________________________________________AbstractThe influence of different parameters in layer morphology and abrasion resistance of Fe-Cr-Celectrodes UTP Ledurit – 61 on steel 1020 was studied. Introduced Energy (Hi, Number of Layers(Nc, and Deposit Width (Ad were the main parameters considered. The metallographicidentification and quantification of metal phases and the determination of their effect in abrasionresistance were made with optical microscopy. The abrasive wear test characterized by scanningelectron microscopy, defines a possible mechanism of surface damage. It was found that the angleformed between a normal line to the surface and the dendrite inclination is directly related withthe increment of wear resistance. Lineal models that correlate wear resistance with quantity, size,and carbide dispersion and dendrite angle inclination were also developed.Key words: morphology, abrasive
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F. Ferrelli
2015-12-01
Full Text Available El estudio del clima urbano es relevante para conocer el ambiente donde habita la mayor parte de la población. Las ciudades presentan sectores que incluyen estructuras edilicias, espacios verdes, suelos al descubierto, tránsito vehicular, necesidades calóricas de la ciudad y diferentes coberturas de sombras. Actualmente, el cambio climático y sus efectos sobre las ciudades son temas de gran interés científico. Son escasas las investigaciones que interpretan los cambios térmicos que se producen en el interior de las ciudades debido a la densificación de los edificios y como consecuencia de la variabilidad climática. Por tal motivo, el objetivo de este trabajo fue analizar el comportamiento de la Temperatura de Superficie Terrestre (TST y su relación con las distintas coberturas del suelo en la ciudad de Bahía Blanca, Argentina. Para ello, se analizaron imágenes satelitales Landsat 5 TM y 7 ETM+ con el método monocanal. Además, se realizó un mapa de coberturas del suelo mediante interpretación visual de imágenes satelitales validado por intervención empírica. Posteriormente, se relacionaron los datos de TST con las coberturas del suelo. En el centro de la ciudad, la TST presentó variaciones espaciales heterogéneas según las estaciones del año y las sombras generadas por los edificios. Los mayores valores de TST se localizaron en la periferia (45,1°C y en urbano muy disperso (46°C y el menor en el centro de la ciudad (2°C. Las distintas coberturas del suelo generaron menores fluctuaciones de TST en invierno (>5°C y las mayores en verano (entre 15 y 25°C.
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Simon, G E; Hoar, B R; Tucker, C B
2016-08-01
Assessment programs are one way beef producers communicate information about animal welfare to retailers and the public. Programs that monitor cattle through the production cycle (e.g., the Global Animal Partnership) or at individual stages (e.g., slaughter; the North American Meat Institute) exist, but to date, there is no assessment program addressing welfare specifically in the cow-calf sector. The objectives of this study were to measure cow-calf health and handling welfare outcomes and gather management, facility, and producer perspective information to 1) describe current practices and 2) inform assessment design. A welfare assessment, designed using features of similar beef and dairy programs, was conducted on 30 California ranches that varied in size (mean 1,051 cows [SD 1,849], range 28 to 10,000 cows) and location within the state. Cattle health and behavior and stockperson handling were measured during a routine procedure (e.g., pregnancy checks) on breeding females ( = 3,065). Management and producer perspectives were evaluated through an interview, and facility features were recorded at the chute and water access points. Cattle health problems were rare and seen only on specific ranches (e.g., prevalence of lame cattle: mean 1.3% [SD 1.5], range 0 to 7.1%). Cattle behavior and stockperson handling varied between ranches (e.g., cattle balking: mean 22.0% [SD 21.9], range 1.6 to 78.3%; electric prod use: mean 23.5 [SD 21.5], range 0 to 73.0%). Although some management and facility characteristics were shared by most (e.g., all ranches castrated bull calves; 86% used alleyways with an anti-back gate), other aspects varied (e.g., weaning age: mean 8.2 mo [SD 1.4], range 6 to 11 mo; 43% used shade cover over chute). Most producers shared similar perspectives toward their herd health management plan, but their responses varied when asked to evaluate an animal's pain experience. In terms of assessment design, there were challenges with feasibility (e
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Prevention of the bad dry of the malanga by treatment of natural, biological origin
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Michel Chamizo Nicao
2014-04-01
Full Text Available One of the most important causes of the decrease of yields in taro crops (Xanthosoma spp. isthe roots rot caused by soil fungi (Bad dry which it’s propagated by the agamic seed used as propagules. One of the most important measures to prevent it is the use of “in vitro” plants free of fungi. In this research was studied the incorporation of several natural and biological products in the plots employed to acclimatize the “invitro” plants. Were evaluated: Trichoderma harzianum, Chitosan, and lobster shell ( Panulirus argus (Latreilleand as control Mancozeb. The taro cultivars employed were Blanca INIVIT and Blanca Venegas, considerate as intermediated and susceptible respectively. Each plot was inoculated with propagules of Sclerotium rolsfii (Sacc.. In order to infer the action mechanism was conducted susceptible tests under “in vitro” conditions. The results showed that the most susceptible cultivar was Blanca Venegas. All treatments decrease the incidence of dry rot, among these. T. harzianum produced the highest effect, antagonist capacity and antagonist effect type. The Chitosan and the lobster shell do not showed antifungal direct effect and probably act for stimulation of the protein synthesis related with the pathogenesis or structural barrier of defense in natural conditions.
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Niñez en riesgo, conceptualizaciones cotidianas y acciones políticas en Argentina
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María Belén Noceti
2011-01-01
Full Text Available La Universidad Nacional del Sur y el Municipio de Bahía Blanca desarrollan un proyecto de investigación denominado ¿La construcción del campo de la niñez en riesgo en el ámbito de políticas públicas en la ciudad de Bahía Blanca¿. El objetivo es caracterizar cómo se construye la niñez en riesgo en Bahía Blanca en contextos de ejecución de políticas públicas en instituciones estatales de salud y educación. Presentaremos aquí resultados parciales de este proyecto, referentes al ámbito educativo. El concepto de niñez en riesgo se construye en la relación niños-adultos; es atravesado por variables étnicas, culturales-territoriales, y socioeconómicas que se actualizan en prácticas concretas en las relaciones escolares. Se observan estereotipos entre niños y adultos que coadyuvan a la definición de unos y otros. Paradójicamente el discurso y accionar del adulto estigmatiza al niño y éste asume una condición de incapacidad, que retroalimenta sus no accesos, generando trampas de pobreza.
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Directory of Open Access Journals (Sweden)
Gustavo G. GONSEBATT
2012-01-01
Full Text Available Las moscas blancas de importancia económica son polífagas y capaces de desarrollarse sobre numerosas plantas cultivadas y espontáneas. Registramos las especies de moscas blancas sobre cultivos hortícolas y de flores, y sobre las plantas silvestres asociadas. Observamos dos especies: Trialeurodes vaporariorum (Westwood y el complejo Bemisia tabaci (Gennadius. T. vaporariorum fue registrada sobre 24 especies de plantas (11 familias, 12 y 8 de las cuales son hospedantes nuevos para Argentina y a nivel mundial, respectivamente. El complejo B. tabaci fue registrado solo en sistemas de producción de flores, sobre 19 especies de plantas (11 familias, 14 y 7 de las cuales son nuevos hospedantes para Argentina y a nivel mundial, respectivamente. Los cultivos Glycine max (L. y Chrysanthemum morifolium Ramat., las especies silvestres Amaranthus blitum L., Amaranthus quitensis Kunth, Conyza bonariensis (L., Galinsoga parviflora Cav., Sonchus oleraceus L. y Wedelia glauca (Ortega O. Hoffm. ex Hicken fueron hospedantes de ambas especies. El único parasitoide registrado fue Eretmocerus californicus cercano a corni Haldeman (Hymenoptera: Aphelinidae sobre T. vaporariorum. Este estudio que constituye el primer relevamiento sistemático de plantas hospedantes en la región, aporta un mayor conocimiento sobre el rango de plantas hospedantes de las moscas blancas en Argentina.
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DEFF Research Database (Denmark)
Mogensen, Niels L.; Oguto, Joseph O.; Dabelsteen, Torben
2011-01-01
Contraction of their historic geographic ranges and conflicts with humans underpins declines in large carnivore populations worldwide. These declines, which characterize pastoral systems where carnivores, people and livestock live in close contact, may be paralleled by changes in carnivore...... the three prides except when the ranch lions were severely disturbed and became more nocturnal and inactive. The reserve lions ate their kills on open plains and returned to them often but the ranch lions did so only inside bushes and abandoned unfinished kills during a drought in 2005. The reserve lions...
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Directory of Open Access Journals (Sweden)
Elisa Rico Cánovas
2016-01-01
Full Text Available En el contexto de los procesos de renovación turística en destinos litorales consolidados, una de las acciones más utilizadas por parte de los agentes públicos y privados es la estrategia de la diversificación del producto turístico a partir de la valorización de elementos del patrimonio natural y cultural. En este trabajo se trata de realizar una breve revisión de las principales aportaciones científicas en el ámbito de la Geografía del Turismo, para posteriormente centrarse en el análisis de la amplitud y diversidad temática del patrimonio cultural del destino de la Costa Blanca (Alicante, España, área turística caracterizada por los síntomas de consolidación que sugieren los modelos evolutivos del Ciclo de Vida del Producto Turístico y las teorías de restructuración productiva. A través de esta aproximación a la potencialidad turística del patrimonio cultural, se identifica el grado de interés turístico de los elementos que conforman los principales temas patrimoniales que podrían ser argumento para la creación de productos turísticos culturales. De este modo, sería factible el desarrollo de una estrategia de diversificación del producto turístico que serviría para mejorar la situación competitiva del destino seleccionado, al tiempo que el patrimonio cultural actuaría como elemento de vertebración territorial superando la segregación funcional que habitualmente se produce entre espacios litorales e interiores.
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Directory of Open Access Journals (Sweden)
Dewi Norytyas Prihatiningrum
2013-08-01
Full Text Available Karangpucung sub-district is centers of Jawa Randu Goats ranch developed by most of the local community. Thet kind of Jawa Randu goats is the result of a cross Jawa goats with Ettawa. The result of Jawa Randu goats ranch having high devotees, not only from local people but also from outside area even outside the province. Consumers of Jawa Randu goats derived from Banyumas, Banjarnegara, Purworejo, Kebumen, West Java and city and the surrounding area. However, development costs during this is only done in a traditional manner that hereditary and some even still are subsistence or only to even support their own, and have not oriented business. Of some of the problems, can be made the formulation of the problem, namely that the activities of the development of "Peternakan Goatie Java Randu" not oriented in a system of agribusiness overall because it still had difficulty in doing downstream off-farm agribusiness subsystem. The purpose of this research is to formulate the implementation of the Jawa Randu goats ranch agribusiness system within the framework of the Karangpucung sub-district development. The target of this study includes: the activity of Jawa Randu goats ranch analysis, rural-urban linkage analysis, backward and forward linkage analysis, and analysis of the application of the Jawa Randu goats ranch agribusiness system within the framework of the Karangpucung sub- district development. Analysis techniques used covering quantitative analysis and qualitative analysis. Quantitative analysis used by using a calculation method that calculates farming and also feasibility analysis of financial as well as calculate the leather processing industry. Whereas qualitative analysis used with a method of descriptive qualitative as well as by the use of a scheme who described the existing conditions of Jawa Randu goats ranch activities. The result from this research is the application level system from the Jawa Randu
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Directory of Open Access Journals (Sweden)
Rubén C. Montes Pérez
1998-09-01
Full Text Available El objetivo del presente estudio fue determinar los géneros y estimar la cantidad de huevecillos y ooquistes de parásitos gastrointestinales (PGI excretados durante un año en heces de venados cola blanca (Odocoileus virginianus yucatenensis mantenidos en cautiverio en Yucatán, México. Se recolectaron muestras fecales en tres confinamientos ubicados en la zona centro del estado de Yucatán, de enero a diciembre de 1995. Diez muestras fueron colectadas de cada confinamiento cada dos semanas. Las muestras fueron procesadas mediante la técnica de Flotación Centrifugada y McMaster. Se realizaron cultivos de heces para obtener larvas infectantes L3 mediante la técnica de Corticelli-Lai. Las heces positivas a ooquistes fueron cultivados en dicromato de potasio al 2%. Se determinaron siete géneros (Haemonchus spp, Cooperia spp, Isospora spp, Eimeria spp, Trichuris spp, Strongyloides spp y Moniezia spp correspondientes a cinco órdenes. Haemonchus spp, Isospora spp y Eimeria spp fueron los géneros más frecuentes. El género Isospora se reporta por primera vez en venados de la región, aunque no fue posible explicar el origen de este hallazgo. La frecuencia y nivel de excresión de huevecillos y ooquistes de PGI fue variable durante el año, con incremento en la época de lluvia. Se encontró correlación positiva entre humedad relativa, temperatura ambiente y precipitación pluvial con los órdenes Coccidia y Strongylida. En la zona centro del estado de Yucatán, México, las condiciones meteorológicas en la época de lluvia son propicias para el desarrollo del parasitismo gastrointestinal, lo que permite mayor riesgo de infección en los venados.Gastrointestinal parasites, and egg and oocyst output in the faeces of captive white-tailed deer (Odocoileus virginianus yucatanensis were recorded in Yucatan, Mexico. Feces were obtained from from January through December 1995 (ten samples every two weeks per place. Samples were processed by
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Working and Learning Among California Oaks
Tietje, B.; Gingg, B.; Zingo, J.; Huntsinger, L.
2009-04-01
With tremendous support from collaborators and enthusiastic volunteers, "Learning Among the Oaks" at the historic Santa Margarita Ranch has become a favorite outdoor learning experience for hundreds of Santa Margarita School students, along with their teachers and families. Oaks are at the center of this unique and cost effective public education program. From getting to know local oaks to exploring conservation issues within the context of a historic working cattle ranch, students take pride in expanding their awareness and knowledge of the local oak woodland community. Santa Margarita School families representing the varied demographics of the community come together on the trail. For many, the program provides a first opportunity to get to know those who make a living on the land and to understand that this land around their school is more than a pretty view. "Learning Among the Oaks" also addresses the need for quality, hands-on science activities and opportunities to connect children with the outdoor world. Using a thematic approach and correlating lessons with State Science Standards, we've engaged students in a full-spectrum of exciting outdoor learning adventures. As students progress through the grades, they find new challenges within the oak trail environment. We've succeeded in establishing an internship program that brings highly qualified, enthusiastic university students out to practice their science teaching skills while working with elementary school students. In the future, these university student interns may assist with the development of interpretive displays, after-school nature activities and monitoring projects. We've benefited from proximity to Cal Poly State University and its "learn-by-doing" philosophy. We've also succeeded in building a dedicated network of volunteers and collaborators, each with a special interest satisfied through participation in the oak trail program. While "Learning Among the Oaks" has focused on educating school
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Directory of Open Access Journals (Sweden)
Christie M. Koontz
2006-01-01
Full Text Available La costumbre de presentar los datos totales sobre el uso de la biblioteca a nivel de todo un sistema bibliotecario (es decir, incluyendo tanto la biblioteca central como las sucursales puede enmascarar las necesidades de los grupos de usua-rios más específicos. Este artículo presenta un estudio que intenta resolver este problema identificando las bibliotecas que sirven a minorías étnicas o a mayorías de raza blanca con bajos ingresos y examinando estas poblaciones para evaluar tipos y niveles de uso. Este estudio es muy importante para la investigación y práctica diaria de las bibliotecas por estas razones: (1 incremento de la diversidad de razas/etnias y lenguas habladas en los Estados Unidos, (2 bajos índices de préstamo agravados por el uso de Internet, (3 la mera existencia de una biblioteca es vital para fomentar el uso por poblaciones sin una tradición bibliotecaria o hábito de lectura y (4 la reciente publicación de la Base de Datos Geográfica de las Bibliotecas Públicas con datos sobre el uso de las bibliotecas y del censo demográfico a nivel de barrios para todos los sistemas bibliotecarios estadou-nidenses. Las metodologías desarrolladas ofrecen posibilidades para la colección de datos importantes para el bibliotecario de hoy día
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Slope movements in Callejón de Huyalas, Peru
Czech Academy of Sciences Publication Activity Database
Vilímek, V.; Zapata, M. L.; Stemberk, Josef
2003-01-01
Roč. 35, supplementum (2003), s. 39-51 ISSN 0300-5402 Institutional research plan: CEZ:AV0Z3046908 Keywords : slope movements * natural hazards * Cordillera Blanca Subject RIV: DB - Geology ; Mineralogy
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Malheur River Wildlife Mitigation Project : 2008 Annual Report.
Energy Technology Data Exchange (ETDEWEB)
Kesling, Jason; Abel, Chad; Schwabe, Laurence
2009-01-01
In 1998, the Burns Paiute Tribe (BPT) submitted a proposal to Bonneville Power Administration (BPA) for the acquisition of the Malheur River Wildlife Mitigation Project (Project). The proposed mitigation site was for the Denny Jones Ranch and included Bureau of Land Management (BLM) and Oregon Division of State Lands (DSL) leases and grazing allotments. The Project approval process and acquisition negotiations continued for several years until the BPT and BPA entered into a Memorandum of Agreement, which allowed for purchase of the Project in November 2000. The 31,781 acre Project is located seven miles east of Juntura, Oregon and is adjacent to the Malheur River (Figure 1). Six thousand three hundred eighty-five acres are deeded to BPT, 4,154 acres are leased from DSL, and 21,242 acres are leased from BLM (Figure 2). In total 11 grazing allotments are leased between the two agencies. Deeded land stretches for seven miles along the Malheur River. It is the largest private landholding on the river between Riverside and Harper, Oregon. Approximately 938 acres of senior water rights are included with the Ranch. The Project is comprised of meadow, wetland, riparian and shrub-steppe habitats. The BLM grazing allotment, located south of the ranch, is largely shrub-steppe habitat punctuated by springs and seeps. Hunter Creek, a perennial stream, flows through both private and BLM lands. Similarly, the DSL grazing allotment, which lies north of the Ranch, is predominantly shrub/juniper steppe habitat with springs and seeps dispersed throughout the upper end of draws (Figure 2).
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Use of a trypanosomal antigen ELISA to monitor tsetse and trypanosomosis control programmes in Kenya
Energy Technology Data Exchange (ETDEWEB)
Olaho-Mukani, W; Munga, L K; Nyanga` O, J N.M.; Ouma, J O; Masika, P; Okech, G; Ndungu, J M [Kenya Trypanosomiasis Research Inst., Kikuyu (Kenya)
1997-02-01
The capture Antigen-ELISA was used to monitor serum samples originating from three study areas in Kenya. At the Galana ranch the test was used to assess re-invasion of an area previously cleared of Glossina pallidipes. In Busia district the Ag-ELISA is being used to monitor the progress of a tsetse and trypanosomosis control programme. At Taita and Tara ranches the capture Antigen ELISA and the buffy coat technique (BCT) were used to evaluate the efficacy of a commercial Cypermethrin dip for the control of Glossina pallidipes. (author). 3 refs, 4 figs, 2 tabs.
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Directory of Open Access Journals (Sweden)
Sabrina Angeletti
2015-07-01
Full Text Available Neohelice granulata inhabits estuarine and protected coastal areas in temperate regions and is the most dominant decapod crustacean in the Bahía Blanca Estuary, Argentina. The population structure was studied during a year in a SW Atlantic salt marsh located in the Bahía Blanca Estuary. Crabs were sampled monthly from August 2010 to July 2011. The maximum observed density was 30 crabs m-2 in February and 70 burrows m-2 in May. The maximum carapace width (CW was 32 and 27.5 mm in males and females respectively. Medium size crabs were between 16 and 20 mm CW. Significantly smaller sized crabs were observed at the lower intertidal regions (P < 0.05. The sex ratio was favorable for males and was significantly different from the expected 1:1 (P < 0.05. The recruitment of unsexed juveniles crabs (CW <6.5 mm was observed throughout the year and the presence of ovigerous females from October to February indicated seasonal reproduction. The average size of ovigerous females was CW = 20.8 mm and the smallest ovigerous female measured was 16 mm CW. For the first time, the population structure of the most important macro-invertebrate is analyzed in the Bahía Blanca Estuary. This study may help to make decisions in the area, where anthropic action is progressing day by day.
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Dantur Juri, María Julia; Estallo, Elizabet; Almirón, Walter; Santana, Mirta; Sartor, Paolo; Lamfri, Mario; Zaidenberg, Mario
2015-06-01
Distribution and abundance of disease vectors are directly related to climatic conditions and environmental changes. Remote sensing data have been used for monitoring environmental conditions influencing spatial patterns of vector-borne diseases. The aim of this study was to analyze the effect of the Normalized Difference Vegetation Index (NDVI) and Land Surface Temperature (LST) obtained from the Moderate Resolution Imaging Spectroradiometer (MODIS), and climatic factors (temperature, humidity, wind velocity, and accumulated rainfall) on the distribution and abundance of Anopheles species in northwestern Argentina using Poisson regression analyses. Samples were collected from December, 2001 to December, 2005 at three localities, Aguas Blancas, El Oculto and San Ramón de la Nueva Orán. We collected 11,206 adult Anopheles species, with the major abundance observed at El Oculto (59.11%), followed by Aguas Blancas (22.10%) and San Ramón de la Nueva Orán (18.79%). Anopheles pseudopunctipennis was the most abundant species at El Oculto, Anopheles argyritarsis predominated in Aguas Blancas, and Anopheles strodei in San Ramón de la Nueva Orán. Samples were collected throughout the sampling period, with the highest peaks during the spring seasons. LST and mean temperature appear to be the most important variables determining the distribution patterns and major abundance of An. pseudopunctipennis and An. argyritarsis within malarious areas. © 2015 The Society for Vector Ecology.
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Mining project of the Taja Margaritas
International Nuclear Information System (INIS)
Martinez A, O.
1980-01-01
A summary of the study of a mining project designed to determine the feasibility of open-pit mining in uranium deposits along the Pena Blanca mountain ridges in Taja Margaritas, is presented. (author)
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Energy Technology Data Exchange (ETDEWEB)
Ruiz C, M A [Facultad de Quimica, UNAM (Mexico)
1998-07-01
Between 1969 and 1971 the National Commission of Nuclear Energy and the Mining Fostering Commission operated coordinately a production plant of uranium and molybdenum concentrates (Benefit plant) at Ciudad Aldama, Chihuahua, Mexico. During two years of operation some 45 tonnes of uranium concentrate and approximately 35,000 tonnes of uranium wetlands were produced. These last were stored in a dam to 120 m. toward West of the plant. Due to the nearness of the population with respect to what was the Benefit plant and over all to the wetland dam, the objective of this work had two main aspects: On the one hand, to carry out the works of radiological decontamination of the benefit plant of uranium, according to the established normative by the Regulatory organization in matter of radiological safety and protection (CNSNS) for the population and the hard workers. After that the works mentioned were realized it was considered that the estate which comprises what was the Benefit plant did not reach the established criteria by the CNSNS for being considered of unrestricted use such estate and it was not allowed any type of construction in the zone which could be showed the residual contamination which remains there. On the other hand, to determine the site where could be stored the radioactive wastes generated by the radiological decontamination and the wetland mobilization for its definitive storage in benefit of the present population and of the future generations due to the radionuclides which are in a such material. The site more adequate technical and economically to storage the wastes generated by this activity was evaluated. Whereby studies about demography, use of soil and water, meteorology, hydrology and ecology were realized. The site selected being in the Pena Blanca mountains, Chihuahua, place where is located one of the uranium zones and the most important of the country. In this work, specific objectives also were treated such as: knowing the radiological
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Fish farming of native species in Colombia: current situation and perspectives
DEFF Research Database (Denmark)
Cruz-Casallas, P. E.; Medina-Robles, V. M.; Velasco-Santamaria, Y. M.
2011-01-01
. The Colombian pisciculture is based on red Tilapia Oreochromis sp. (Linnaeus), Rainbow trout Oncorhynchus mykiss (Walbaum) and cachama blanca Piaractus brachypomus (Cuvier), which currently represent around 96% of the total national production. The remaining 4% comes from other farmed species such as bocachico......In Colombia and the rest of the world, the decrease in capture fisheries production has turned the aquaculture into an alternative source of protein for the populations food security as well as an important productive activity, generating employment and income for the rural communities...... Prochilodus magdalenae (Steindachner), carp Cyprinus carpio (Linnaeus) and yamu Brycon amazonicus (Spix & Agassiz). From the three main fish species, cachama blanca is the only native species, which has shown excellent performance in pond farming due to its rusticity, omnivorous habits, docility, meat quality...
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Directory of Open Access Journals (Sweden)
Ulises Aguilera-Reyes
2013-03-01
Full Text Available El venado cola blanca es una especie con una gran plasticidad conductual y de adaptación en diferentes hábitat. En el Parque Sierra Nanchititla en el Estado de México se realizó un estudio para determinar los hábitos alimentarios en el bosque mesófilo de montaña (BMM y bosque de pino-encino (BPE. De junio 1990 a mayo 1992 se recolectaron 104 muestras de excremento de venado en las dos zonas de estudio. Aplicamos el índice de Morisita y la correlación de Spearman para determinar la preferencia alimentaria. Se utilizó el análisis histológico de heces fecales para herbívoros las cuales se compararon con muestras de tejidos vegetales de plantas de la zona de estudio. Los resultados muestran que consume el 79.44% de especies vegetales del BMM y 20.56% del BPE. Existe cierta tendencia en la selectividad de 12 de las 14 especies de plantas localizadas en el BMM, mientras que para el BPE no se aprecia tal tendencia. Las especies clave que for- man parte de la alimentación elemental del venado fueron: Acalypha setosa, Smilax pringlei, Psidium sartorianum y Dendropanax arborea. El consumo de plantas no varió sig- nificativamente entre la época seca y lluviosa en función de la forma biológica (X2=12, p=0.21. Sin embargo, durante la época seca existe cierta tendencia a consumir árboles y a finales de la época de lluvia a consumir hierbas (Z=1.61, p=0.95. Los datos indican que el venado puede ser selecti- vo con plantas del BMM, mientras que para el BPE tiende a ser oportunista.Food habits of the white-tailed deer, Odocoileus virginianus (Artiodactyla: Cervidae in Nanchititla Natural Park, Mexico. White-tailed deer is a species with a large behavioral plasticity and adapta- tion to different habitats, including their food habits. This study was conducted with the aim to determine the food habits of this species in the cloud (BMM and pine-oak (BPE forests. Deer scats and plant samples were obtained following standard methods, from Sierra
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Moving target feature phenomenology data collection at China Lake
Gross, David C.; Hill, Jeff; Schmitz, James L.
2002-08-01
This paper describes the DARPA Moving Target Feature Phenomenology (MTFP) data collection conducted at the China Lake Naval Weapons Center's Junction Ranch in July 2001. The collection featured both X-band and Ku-band radars positioned on top of Junction Ranch's Parrot Peak. The test included seven targets used in eleven configurations with vehicle motion consisting of circular, straight-line, and 90-degree turning motion. Data was collected at 10-degree and 17-degree depression angles. Key parameters in the collection were polarization, vehicle speed, and road roughness. The collection also included a canonical target positioned at Junction Ranch's tilt-deck turntable. The canonical target included rotating wheels (military truck tire and civilian pick-up truck tire) and a flat plate with variable positioned corner reflectors. The canonical target was also used to simulate a rotating antenna and a vibrating plate. The target vehicles were instrumented with ARDS pods for differential GPS and roll, pitch and yaw measurements. Target motion was also documented using a video camera slaved to the X-band radar antenna and by a video camera operated near the target site.
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Foster, K.; Garcia, A.
1972-01-01
High altitude color and multispectral black and white photography was used to survey existing vegetation and soil conditions on the Empire Ranch where large scale development will soon begin. Utilizing stereo pairs of the high altitude color photography, four vegetation classifications were discernable as a function of topography and foliage characteristics. In contrast to the undeveloped Ranch, the same photography was used to detect environmental changes in the Tucson metropolitan area as a result of rapid urbanization. The most prevalent change related to development is the removal of vegetation in high density areas to allow for housing starts. Erosion then occurs where vegetation has been removed.
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Directory of Open Access Journals (Sweden)
Ronaldo Francini-Filho
2010-01-01
Full Text Available The reef coral Mussismilia braziliensis Verril, 1968 is endemic to the eastern Brazilian coast, representing a major reef-building species in the region. This coral is threatened by extinction due to the recent proliferation of a white-plague like (WPL disease. Despite its severe impacts, the environmental factors leading to outbreaks of WPL disease are still poorly understood. This study describes the seasonal prevalence of WPL disease on M. braziliensis in the Abrolhos Bank, on the southern coast of Bahia Brazil. In situ estimates showed that WPL disease was about 4.5 times more prevalent in summer (January 2007, mean sea surface temperature 27.4°C than in winter (July 2007, 25.0°C. This result suggests that the prevalence of WPL disease in M. braziliensis is temperature-dependent, supporting the hypothesis that warmer oceans are facilitating the proliferation of coral diseases worldwide.El coral Mussismilia braziliensis Verril, 1968 es endémico de la costa este de Brasil y representa una de las principales especies constructoras de arrecifes coralinos en dicha region. Este coral se encuentra bajo la amenaza de extincion debido la reciente propagacion de la enfermedad llamada la plaga blanca (PB. Pese los fuertes impactos, los factores ambientales responsables por epidemias de la PB aún son poco conocidos. En este estudio se describe la prevalencia estacional de la PB en M. braziliensis en el Banco de Abrolhos, ubicado en la costa sur de Bahia, Brasil. Estimaciones in situ comprueban que la prevalencia de esta molestia ha sido cerca de 4,5 veces mayor en verano (enero de 2007, temperatura media del agua superficial del mar 27,4°C, que en invierno (julio de 2007; 25,0°C. Este resultado sugiere que la prevalencia de la enfermedad PB en M. braziliensis es dependiente de la temperatura, reforzando la hipótesis de que los océanos mas cálidos estén facilitando la propagacion de enfermedades coralígenas en todo el mundo.
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2013-08-13
... acquired in the future by the Tribe, under any grant, transfer, purchase, gift, adjudication, executive... for the purchase and sale of alcoholic beverages through tribally licensed outlets will increase the... contracts, leases with options to purchase, and any other contract under which possession of property is...
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Directory of Open Access Journals (Sweden)
Leopoldo de La Rosa
1963-12-01
Full Text Available El documento presenta los poemas del autor titulados: Canción del mar; Nocturno V; Nocturno IX; Nocturno XII; Nocturno XIV; Ncturno XV; Nocturno XVIII; Nocturno XX; Nocturno XXV; Nocturno XXVI; Viajar y Mujer Blanca
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Arteaga, Blanca
2015-01-01
Reseña del libro " Educar no es domesticar. Educando desde la libertad, en libertad y para la libertad" de José Fernando Calderero Hernández, por Blanca Arteaga. Editorial Sekotia, Madrid, 2014, 286 págs.
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Monitoreo del glaciar Artesonraju, cordillera blanca
Instituto Nacional de Recursos Naturales. Intendencia de Recursos Hídricos. Unidad de Glaciología y Recursos Hídricos; Gómez López, Jesús; Gonzáles Lizarme, Gilber; Cochachín Rapre, Alejo; Quijano, Joe; Tournoud, Matthieu
2003-01-01
Muestra la evolución del glaciar Artesonraju, como sensor del cambio climático y fuente de recurso hídrico, asimismo calcula el balance glaciológico en base a datos hidrometereológicos. Este glaciar esta ubicado en el distrito de Caraz, provincia de Huaylas, departamento de Ancash.
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Astrólogos y astrología al servicio de la monarquía navarra durante la Baja Edad Media (1350-1446
Directory of Open Access Journals (Sweden)
Serrano Larráyoz, Fernando
2009-12-01
Full Text Available This article provides a general view on astrologers who served at the courts of Carlos II, Carlos III and Blanca I of Navarre. This was a position that combined the foretelling of future events with the medical practice of the moment. Despite the prestige that astrologers seem to achieve, this position was never held long term except in some concrete cases.
El artículo presenta una visión general de los astrólogos que sirvieron en la corte de Carlos II, Carlos III y Blanca I de Navarra. Un cargo cortesano que unía la adivinación de hechos futuros con la práctica médica del momento. Pese al prestigio que parecen alcanzar, no resulta una ocupación con cierta continuidad, salvo en casos muy concretos. -
Directory of Open Access Journals (Sweden)
Jezabel Franza
2008-12-01
desarrolla un sentimiento distintivo de territorialidad. El objetivo de la presente comunicación es brindar los fundamentos y bases para la implementación de este tipo de espacios de agricultura urbana y periurbana en la ciudad de Bahía Blanca. Esta clase de proyectos puede ser entendido como una posibilidad de progreso en la gestión ambiental urbana para ciudades como la mencionada donde existe una escasa política en relación con los espacios ociosos y la única respuesta, en el mejor de los casos, es transformar estas tierras en espacios de circulación peatonal. La metodología se sustenta en la recopilación, análisis e interpretación de material bibliográfico y testimonios de informantes claves mediante el empleo de técnicas cualitativas propias de la Geografía Humana. Para ello se emplea como base del análisis la experiencia de la ciudad de Rosario, la cual es pionera en esta modalidad de recuperación de espacios y se incluye en un proyecto integral de desarrollo urbano singular. Creemos conveniente mencionar que el presente trabajo surge como instancia evaluadora final de la Cátedra Curso de Desarrollo Ambiental Urbano dictado por la Dra. María Amalia Lorda, correspondiente a los Ciclos de Orientación Organización y Ordenamiento del Espacio Urbano y Regional y Gestión de los Recursos Naturales y Medio Ambiente del quinto año de la Licenciatura en Geografía del Departamento de Geografía y Turismo de la Universidad Nacional del Sur. Asimismo el escrito es una inquietud grupal que propone recuperar espacios urbanos degradados mediante la iniciativa de agricultura urbana a través de la implementación de parques-huerta.
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2010-07-01
... transmission line systems, substations, commercial radio transmitters, relays or repeater stations, antennas, and other electronic sites and associated structures. Traditional uses are ranching, grazing, farming...
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Directory of Open Access Journals (Sweden)
Syafrika Deni Rizki
2017-01-01
Full Text Available AbstrakPerancangan aplikasi sistem informasi geografis untuk pemetaan dan pencarian Kandang Peternakan Di Kabupaten Padang Pariaman berbasis android bertujuan untuk memberikan informasi lokasi Kandang Peternakan kepada masyarakat yang ada di Kabupaten Padang Pariaman maupun masyarakat luar Kabupaten Padang Pariaman tersebut, serta memberikan informasi-informasi mengenai detail Kandang Peternakan. Sehingga diharapkan dapat di akses kapanpun dan dimana pun.Pembuatan Sistem Informasi Geografis berbasis android ini dibuat menggunakan MapInfo Professional 9.0 sebagai dasar pembuatan peta aplikasi, Eclipse sebagai dasar Aplikasi di android , dan Giscloud sebagai server penyimpanan peta secara online.Aplikasi ini diharapkan dapat dipergunakan untuk mendapatkan informasi Kandang Peternakan Di Kabupaten Padang Pariaman yang disajikan dalam bentuk sebuah aplikasi peta Dan Informasi tentang Kandang Peternakan. Aplikasi ini dapat digunakan secara online maupun offline. Kata kunci : Sistem informasi geografis , MapInfo , Eclipse, Giscloud, Android Abstract The design of the application of geographic information system for mapping and Cages Animal Husbandry android-based In the district of Padang Pariaman to provide location information Cage Ranch to the people in the district of Padang Pariaman and communities outside Padang Pariaman district, as well as provide information about the details of the Cage Ranch. android based Geographic Information System was created using MapInfo Professional 9.0 as the basis for the map application, Eclipse as the basis of applications in the android, and Giscloud as maps online. The storage server aplication is expected to be used for get information Cage Ranch in Padang Pariaman district were presented in the form of a map application and information about the Cage Ranch. This application can be used online or offline. Keywords: geographic information system, MapInfo , Eclipse, Giscloud, Android
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Land use effect on soil meso and macro-organisms in Quindio coffee zone
International Nuclear Information System (INIS)
Sadeghian Siavosh
2001-01-01
Meso and macro-organisms communities in different agro-ecosystems were evaluated on the Colombian coffee region (Quindio) during the second semester of 1997. Soil samples were taken at 10 cm of deep and the Berlese funnel apparatus was used for evaluations. The agro-ecosystems were Guadual (Guadua angustifolia), traditional and technical coffee, citrus, and cassava crops, cattle ranching (extensive and intensive systems). A total of twenty taxonomic groups were identified. The most abundant and common specimens were ants, acari, collembola and diplura. The greatest diversity and abundance of organisms were registered on the G. angustifolia and coffee agro-ecosystems. The opposite tendency was observed on the cattle ranching due to physical degradation, associated to soil compacting
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Recovery Act:Rural Cooperative Geothermal development Electric & Agriculture
Energy Technology Data Exchange (ETDEWEB)
Culp, Elzie Lynn [Surprise Valley Electrification Corp., Alturas, CA (United States)
2016-01-12
Surprise Valley Electric, a small rural electric cooperative serving northeast California and southern Oregon, developed a 3mw binary geothermal electric generating plant on a cooperative member's ranch. The geothermal resource had been discovered in 1980 when the ranch was developing supplemental irrigation water wells. The 240°F resource was used for irrigation until developed through this project for generation of electricity. A portion of the spent geothermal fluid is now used for irrigation in season and is available for other purposes, such as greenhouse agriculture, aquaculture and direct heating of community buildings. Surprise Valley Electric describes many of the challenges a small rural electric cooperative encountered and managed to develop a geothermal generating plant.
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International Nuclear Information System (INIS)
Ruiz C, M.A.
1998-01-01
Between 1969 and 1971 the National Commission of Nuclear Energy and the Mining Fostering Commission operated coordinately a production plant of uranium and molybdenum concentrates (Benefit plant) at Ciudad Aldama, Chihuahua, Mexico. During two years of operation some 45 tonnes of uranium concentrate and approximately 35,000 tonnes of uranium wetlands were produced. These last were stored in a dam to 120 m. toward West of the plant. Due to the nearness of the population with respect to what was the Benefit plant and over all to the wetland dam, the objective of this work had two main aspects: On the one hand, to carry out the works of radiological decontamination of the benefit plant of uranium, according to the established normative by the Regulatory organization in matter of radiological safety and protection (CNSNS) for the population and the hard workers. After that the works mentioned were realized it was considered that the estate which comprises what was the Benefit plant did not reach the established criteria by the CNSNS for being considered of unrestricted use such estate and it was not allowed any type of construction in the zone which could be showed the residual contamination which remains there. On the other hand, to determine the site where could be stored the radioactive wastes generated by the radiological decontamination and the wetland mobilization for its definitive storage in benefit of the present population and of the future generations due to the radionuclides which are in a such material. The site more adequate technical and economically to storage the wastes generated by this activity was evaluated. Whereby studies about demography, use of soil and water, meteorology, hydrology and ecology were realized. The site selected being in the Pena Blanca mountains, Chihuahua, place where is located one of the uranium zones and the most important of the country. In this work, specific objectives also were treated such as: knowing the radiological
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RANCH, Radionuclide Migration in Geological Media
International Nuclear Information System (INIS)
Patry, J.; Hadermann, J.
1991-01-01
1 - Description of problem or function: One-dimensional transport of radionuclide chains through layered geological media, taking into account longitudinal dispersion, convection and retention. 2 - Method of solution: Semi-analytical solution by Laplace transform. Convolution integrals. 3 - Restrictions on the complexity of the problem: Maximum 4 nuclides and 10 layers. Peclet number large compared to 1
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an analysis of perceived prominent decision making areas in ...
African Journals Online (AJOL)
p2333147
Keywords: Game ranch management, decision making, risk perception, springbuck. ABSTRACT ..... environment, herd management (herd structure) and marketing and client satisfaction .... Prospect theory: An analysis of decision under risk.
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Directory of Open Access Journals (Sweden)
Agustín Rodríguez Garavito
1970-06-01
Full Text Available Se presentan las reseñas de los siguientes textos: -Hernando Torres Neira, Susata -Blanca Isaza de Jaramillo Mesa, Cuentos de la Montaña -Germán de Granda, Transculturación e interferencia linguistica en Puerto Rico
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Endangering of the dam stability of Palcacocha Lake by slope movements, in Peru
Czech Academy of Sciences Publication Activity Database
Vilímek, V.; Zapata, M. L.; Klimeš, Jan; Patzelt, Z.; Santillán, N.
2005-01-01
Roč. 2, č. 2 (2005), s. 107-115 ISSN 1612-510X Grant - others:GA MŠk(CZ) LA 157 Institutional research plan: CEZ:AV0Z30460519 Keywords : landslides * glacial lakes * Cordillera Blanca Subject RIV: DC - Siesmology, Volcanology, Earth Structure
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The EPA Agriculture Resource Directory offers comprehensive, easy-to-understand information about environmental stewardship on farms and ranches; commonsense, flexible approaches that are both environmentally protective and agriculturally sound.
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75 FR 6218 - New Melones Lake Area Resource Management Plan, Tuolumne and Calaveras Counties, CA
2010-02-08
..., CA 95222. Calaveras Planning Department, Calaveras County Government Center, 891 Mountain Ranch Road, San Andreas, CA 95249. San Andreas Central Library, 1299 Gold Hunter Road, San Andreas, CA 95249...
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Directory of Open Access Journals (Sweden)
Tello Paola
2007-12-01
Full Text Available
La mosca blanca de los invernaderos, Trialeurodes vaporariorum (Westwood (Homoptera: Aleyrodidae es una de las plagas más importantes de cultivos de tomate bajo invernadero en la Sabana de Bogotá. Para su control tradicionalmente se acude a la aplicación de insecticidas. Sin embargo, también son contempladas liberaciones del parasitoide Encarsia formosa (Gahan (Hymenoptera: Aphelinidae. Para estandarizar el proceso de cría masiva de E. formosa, se evaluaron tres densidades diferentes de liberación de las avispas (6, 12 y 18 avispas/planta en tres frecuencias de liberación (1, 2 y 3 veces/semana, sobre plantas de tomate de ocho semanas de edad con tres niveles de infestación (15, 30 y 45 ninfas de mosca blanca/hoja, susceptibles de ser parasitadas. El mayor porcentaje de parasitismo (70% en ninfas de tercer instar se logró cuando se liberaron seis avispas por planta, dosificadas en tres momentos diferentes en la misma semana. El menor porcentaje de parasitismo (50%, se obtuvo cuando se realizó una sola liberación de 6, 12 o 18 avispas. Los resultados anteriores permiten concluir que se puede lograr un porcentaje de parasitismo en torno a un 70% de la infestación de mosca blanca (hasta 45 ninfas/hoja en plantas de tomate con pocas avispas de E. formosa (seis cuando se liberan en tres momentos diferentes.
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2012-10-26
.... SUPPLEMENTARY INFORMATION: Introduction We have received an application for an incidental take permit covering... occurred at the Ranch, such as grazing and film production, and new activities, including limited public...
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2012-06-13
..., 12000376 COLORADO Huerfano County Montoya Ranch, 19176 CO 69, Farisita, 12000377 DELAWARE New Castle County... KANSAS Butler County Gish, Amos H., Building, 317 S. Main, Eldorado, 12000383 Dickinson County Gordon...
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Proceedings of the Symposium Anais do Simposio
National Research Council Canada - National Science Library
Tazik, David
2004-01-01
.... Critical to the maintenance of this natural diversity is the historical pattern of seasonal flooding that also affects economic activities in the region -- cattle ranching, commercial and sport fishing, and ecotourism...
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75 FR 82386 - Environmental Impacts Statements; Notice of Availability
2010-12-30
...: Kenneth Hogan 202-502-8434. Amended Notices EIS No. 20100449, Draft EIS, USFS, MT, Stillwater Mining Revised Water Management Plans and BOE Ranch LAD, Implementation, Stillwater and Nye Counties, MT, Comment...
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2012-07-30
... CAFO: Beef cattle feedlots (including veal 112112 0211 calves). Beef cattle ranching and farming........ 112111 0212 Hogs 11221 0213 Sheep and Goats 11241, 11242 0214 General livestock except dairy and 11299...
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1979-03-22
multi-station discriminants than by those based on network averages. In spite of this situ - ation, average a posteriori probabilities were sometimes...Technology, Pasadena, California. Allen, C. R., L. T. Silver, and F. G. Stehi (1960). Agua Blanca fault - a major transverse structure of northern Baja
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National Research Council Canada - National Science Library
Michalek, J
2000-01-01
.... A Comparison cohort comprised Air Force veterans who served in Southeast Asia during the same time period that the Ranch Hand unit was active and who were not involved with spraying herbicides...
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El registro más antiguo de Hippidion Owen, 1869 (Mammalia, Perissodactyla en América del Sur
Directory of Open Access Journals (Sweden)
Reguero, M. A.
1998-04-01
Full Text Available The presence of Hippidion devillei in the Esquina Blanca locality (Jujuy, Argentina is confirmed and following the paleomagnetic data is placed near to the Matuyama/Gauss boundary. These remains represent the oldest record of Hippidion in South America. We consider that the validity of the Uquian Land Mammal Age should not be discarded in consideration that the Uquia region is better endowed than the Pampean.Se confirma la presencia de Hippidion devillei en la localidad de Esquina Blanca (Jujuy, Argentina y se sitúa, a partir de los datos paleomagnéticos, en una edad cercana al límite Matuyama/Gauss. Estos restos representan el registro más antiguo de esta especie en América del Sur. Consideramos que no se debe descartar la validez de la «Edad mamífero » Uquiense descrita por primera vez en esta región por tener ventajas sobre los afloramientos de la costa Bonaerense.
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Influence of farming system and production purpose on the morpho structure of Spanish goat breeds
Energy Technology Data Exchange (ETDEWEB)
Gonzalez-Martinez, A.; Herrera, M.; Luque, M.; Rodero, E.
2014-06-01
The aim of this study was to examine the possible influence of farming systems, based on the morpho structure of 1,571 female goats drawn from 40 flocks containing seven Spanish breeds (Blanca Andaluza, Blanca Celtiberica, Negra Serrana, Pirenaica, Payoya, Murciano-Granadina and Malaguena) raised under four different farming systems. Analysis of morphometric variables showed that the morphostructure of native Spanish goat breeds was linked to the farming system used and thus to the production purpose. The morphostructure of grazing breeds may be more influenced by natural selection within the physical environment and less by human selection. That of stall-fed breeds, by contrast, reflects intense artificial selection aimed at achieving a highly-productive dairy type. For this reason, morphological evaluation systems used in breeding programmes for meat or dual-purpose goat breeds farmed extensively or semiextensively should be specific, and should reflect the influence of the environment in which these goats are farmed. (Author)
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Agressão por arma branca e arma de fogo interligada ao consumo de drogas
Directory of Open Access Journals (Sweden)
Zélia Maria de Santos Sousa Araújo
2004-01-01
Full Text Available El objetivo de este estudio fue identificar y analizar el perfil de 80 clientes sometidos a intervención quirúrgica, víctimas de agresión por arma blanca o de fuego, que estaban sobre el efecto de sustancia psicoactiva. Los datos fueron obtenidos através de la entrevista y complementados con los registros de las historias clínicas. Se constató que la violencia fue mediada por la agresión de arma blanca o de fuego y la mayoría de los entrevistados eran usuarios de sustancias psicoactivas, jóvenes, solteros, sexo masculino, teniendo como escenario las calles, predominantemente en los finales de semana. Frente a los resultados, se sugiere la implementación de estrategias educativas, articulando las escuelas y la comunidad, con el objetivo de combatir la violencia, la drogadicción y el alcoholismo entre los niños y adolescentes.
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Influence of farming system and production purpose on the morphostructure of Spanish goat breeds
Directory of Open Access Journals (Sweden)
Ana Gonzalez-Martinez
2014-02-01
Full Text Available The aim of this study was to examine the possible influence of farming systems, based on the morphostructure of 1,571 female goats drawn from 40 flocks containing seven Spanish breeds (Blanca Andaluza, Blanca Celtiberica, Negra Serrana, Pirenaica, Payoya, Murciano-Granadina and Malagueña raised under four different farming systems. Analysis of morphometric variables showed that the morphostructure of native Spanish goat breeds was linked to the farming system used and thus to the production purpose. The morphostructure of grazing breeds may be more influenced by natural selection within the physical environment and less by human selection. That of stall-fed breeds, by contrast, reflects intense artificial selection aimed at achieving a highly-productive dairy type. For this reason, morphological evaluation systems used in breeding programmes for meat or dual-purpose goat breeds farmed extensively or semi-extensively should be specific, and should reflect the influence of the environment in which these goats are farmed.
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Directory of Open Access Journals (Sweden)
Alvarez Vanessa
2011-12-01
Full Text Available Se evaluó la capacidad in vitro de aceites esenciales obtenidos de hojas y fiores de diferentes muestras de Lippia origanoides cultivada en condiciones del Valle del Cauca, Colombia, para inhibir el crecimien- to micelial y la formación de esclerocios de Sclerotium cepivorum, patógeno causante de la pudrición blanca en cebolla. Todos los aceites evaluados mostraron efecto inhibitorio tanto en el crecimiento micelial como en la formación de esclerocios, en concentraciones de 250 - 1350 iL/L% No obstante, aquellos obtenidos a partir del quimiotipo ( presentaron el mayor poder inhibitorio en el crecimiento del micelio concentración m+nima inhibitoria, /4( 5 120 iL/L8 y en la formación de esclerocios% 9s+, el quimiotipo ( de L. origanoides puede ser utilizado potencialmente para el control de la pudrición blanca en cebolla.
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Directory of Open Access Journals (Sweden)
Abdel-Rahim, E. A.
2013-03-01
Full Text Available This study was carried out to evaluate the effects of soaked white bean seeds, pomegranate seeds and dried peels and their mixtures on the lipid profiles of rats suffering from hyperlipidemia and hypercholesterolemia. The chemical compositions of dried soaked beans and pomegranate (seeds and peels were determined on dry matter which amounted to good values for proteins, lipids, crude fiber and phenols. Also, the phenol contents of pomegranate seeds and peels showed 16 compounds varying in amount between them. It was noticed that catechin and phenol are the dominating compounds. The obtained results showed a good hypolipidemic ability for soaked bean seeds and pomegranate (seeds, peels and their mixtures as well as their mixtures. A bean seeds diet produced a general improvement in the clinical status of blood lipid profile (total lipids, triglycerides, cholesterol, HDL-c, LDL-c and VLDL-c, liver function (ALT, AST and bilirubin, kidneys function (uric acid, urea and creatinine, blood lipid peroxidation and antioxidant enzymes (SOD and CAT by which hyperlipidemia and hypercholesterolemia were reduced. The mixed diet had the best influence concerning biological studies than the other treatments which used bean seeds and pomegranate (seeds and peels alone.
Se ha llevado a cabo un estudio para evaluar los efectos de las semillas de alubias blancas y de las de granadas así como de sus cáscaras secas y sus mezclas sobre los perfiles de lípidos de ratas que sufren de hiperlipidemia e hipercolesterolemia. La composición química de las alubias blancas y de las granadas (semillas y cáscaras fue determinada en base a materia seca alcanzando una buena relación de proteínas, lípidos, fibra cruda y fenoles. Además, el contenido de fenoles de las semillas y las cáscaras de granada mostraron 16 compuestos que varían en cantidad entre ellos. Se observó que la catequina y los fenoles son los compuestos predominantes. Los resultados obtenidos -
Third-Source Causation: An Alternative Explanation for the Check Mark Pattern
National Research Council Canada - National Science Library
Jackson, William G
2006-01-01
The Air Force Health Study (AFHS) is a 20-year longitudinal study examining the health, mortality and reproductive outcomes of the Air Force Operation Ranch Hand veterans responsible for handling and aerially spraying herbicides...
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75 FR 31843 - Identification of Non-Hazardous Secondary Materials That Are Solid Waste
2010-06-04
... Cattle Ranching and Farming 1121 Warehouse 493 Hog and Pig Farming 1122 Retail 442-454 Poultry and Egg Production 1123 Education 611 Sheep and Goat Farming 1124 Social Assistance...... 624 Horses and Other Equine...
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Directory of Open Access Journals (Sweden)
David G. McGrath
2007-10-01
Full Text Available While the organizational dynamics of collective management systems have received much attention, relatively little work has focused on how households adapt their economic strategies in response to collective management regulations that impose constraints on the range of options available to households. In this paper we investigate the evolving interaction between household management strategies and collective management regulations for one or both of two ecologically interdependent floodplain resources, lake fisheries and seasonally inundated grasslands. Smallholder management strategies involve varying combinations of three main activities each associated with one of three main floodplain habitats: annual cropping on river levees, cattle ranching on natural grasslands and fishing in lakes. These three activities play complementary roles in the household economy. Annual cropping is both subsistence and market oriented, with cash from crop sales often invested in purchase of cattle. Fishing, in addition to providing animal protein, generates income for household purchases while crops are growing. Cattle ranching is the main savings strategy for smalholders, providing funds for family emergencies and capital investments. Despite the fertility of soils and the higher productivity per hectare of fishing, cattle ranching has expanded steadily on the floodplain at the expense of farming and fishing. Over the last two decades, communities throughout the Amazon floodplain have developed and implemented collective agreements to regulate access to and use of local lake fisheries. Depending on the measures included, the impact of these agreements on household management strategies can range from negligible to highly significant, requiring major adjustments to compensate for reduced fishing income. Expansion of smallholder cattle ranching has taken advantage of unregulated access to community grasslands. Unregulated access to community grasslands has been a
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The Nopal 1 Uranium Deposit: an Overview
Calas, G.; Allard, T.; Galoisy, L.
2007-05-01
The Nopal 1 natural analogue is located in the Pena Blanca uranium district, about 50 kms north of Chihuahua City, Mexico. The deposit is hosted in tertiary ignimbritic ash-flow tuffs, dated at 44 Ma (Nopal and Colorados formations), and overlying the Pozos conglomerate formation and a sequence of Cretaceous carbonate rocks. The deposit is exposed at the ground surface and consists of a near vertical zone extending over about 100 m with a diameter of 40 m. An interesting characteristic is that the primary mineralization has been exposed above the water table, as a result of the uplift of the Sierra Pena Blanca, and subsequently oxidized with a remobilization of hexavalent uranium. The primary mineralization has been explained by various genetic models. It is associated to an extensive hydrothermal alteration of the volcanic tuffs, locally associated to pyrite and preserved by an intense silicification. Several kaolinite parageneses occur in fissure fillings and feldspar pseudomorphs, within the mineralized breccia pipe and the barren surrounding rhyolitic tuffs. Smectites are mainly developed in the underlying weakly welded tuffs. Several radiation-induced defect centers have been found in these kaolinites providing a unique picture of the dynamics of uranium mobilization (see Allard et al., this session). Another evidence of this mobilization is given by the spectroscopy of uranium-bearing opals, which show characteristic fluorescence spectra of uranyl groups sorbed at the surface of silica. By comparison with the other uranium deposits of the Sierra Pena Blanca and the nearby Sierra de Gomez, the Nopal 1 deposit is original, as it is one of the few deposits hving retained a reduced uranium mineralization.
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Silenzi, Juan C.; Echeverría, Nora E.; Vallejos, Adrián G.; Bouza, Mariana E.; De Lucia, Martín P.
2012-01-01
Wind erosion risk (WER) for soils of each municipality in the southwest (SW) of Buenos Aires Province (10,491,172 ha) was determined using the wind erosion equation (WEQ) model. WER results from multiplying the soil erodibility index (" I") of the soil by the climatic factor ( C). WER (Mg ha -1 year -1) of each municipality was: Bahía Blanca: 22.4, Coronel Dorrego: 18.6, Coronel Pringles: 4.5, Coronel Rosales: 48.2, Coronel Suárez: 4.5, Guaminí: 3.0, Patagones: 104.6, Puan: 12.2, Saavedra: 3.0, Tornquist: 6.8, and Villarino: 31.7. The maximum weighted average of " I" (Mg ha -1 year -1) corresponded to Coronel Rosales (87.6), Patagones (87.2), Villarino (85.7), Puan (67.9); Guaminí (59.6), Coronel Dorrego (53.1), and Bahía Blanca (39.3); the remaining municipalities ranged between 34.9 and 32.1 Mg ha -1 year -1. The highest C (%) corresponded to Patagones (120), Bahía Blanca (57), Coronel Rosales (55), Villarino (37), Coronel Dorrego (35), Tornquist (21), and Puan (18); for the remaining municipalities it was 14%. The productivity index (PI) is known to establish a numerical value of the productive capacity of lands. The relationship between WER and PI, weighted averages, in all the studied municipalities was fitted by means of a linear model, WER (Mg ha -1 year -1) = 95.23 - 2.09 * PI (%) ( R2 = 66%), and a second-order polynomial model, WER (Mg ha -1 year -1) = 139.41 - 5.86 * PI (%) + 0.07 * PI 2 (%) ( R2 = 74%). No statistically significant relationship was found between WER and PI for each municipality.
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Reading a 400,000-year record of earthquake frequency for an intraplate fault.
Williams, Randolph T; Goodwin, Laurel B; Sharp, Warren D; Mozley, Peter S
2017-05-09
Our understanding of the frequency of large earthquakes at timescales longer than instrumental and historical records is based mostly on paleoseismic studies of fast-moving plate-boundary faults. Similar study of intraplate faults has been limited until now, because intraplate earthquake recurrence intervals are generally long (10s to 100s of thousands of years) relative to conventional paleoseismic records determined by trenching. Long-term variations in the earthquake recurrence intervals of intraplate faults therefore are poorly understood. Longer paleoseismic records for intraplate faults are required both to better quantify their earthquake recurrence intervals and to test competing models of earthquake frequency (e.g., time-dependent, time-independent, and clustered). We present the results of U-Th dating of calcite veins in the Loma Blanca normal fault zone, Rio Grande rift, New Mexico, United States, that constrain earthquake recurrence intervals over much of the past ∼550 ka-the longest direct record of seismic frequency documented for any fault to date. The 13 distinct seismic events delineated by this effort demonstrate that for >400 ka, the Loma Blanca fault produced periodic large earthquakes, consistent with a time-dependent model of earthquake recurrence. However, this time-dependent series was interrupted by a cluster of earthquakes at ∼430 ka. The carbon isotope composition of calcite formed during this seismic cluster records rapid degassing of CO 2 , suggesting an interval of anomalous fluid source. In concert with U-Th dates recording decreased recurrence intervals, we infer seismicity during this interval records fault-valve behavior. These data provide insight into the long-term seismic behavior of the Loma Blanca fault and, by inference, other intraplate faults.
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Reading a 400,000-year record of earthquake frequency for an intraplate fault
Williams, Randolph T.; Goodwin, Laurel B.; Sharp, Warren D.; Mozley, Peter S.
2017-05-01
Our understanding of the frequency of large earthquakes at timescales longer than instrumental and historical records is based mostly on paleoseismic studies of fast-moving plate-boundary faults. Similar study of intraplate faults has been limited until now, because intraplate earthquake recurrence intervals are generally long (10s to 100s of thousands of years) relative to conventional paleoseismic records determined by trenching. Long-term variations in the earthquake recurrence intervals of intraplate faults therefore are poorly understood. Longer paleoseismic records for intraplate faults are required both to better quantify their earthquake recurrence intervals and to test competing models of earthquake frequency (e.g., time-dependent, time-independent, and clustered). We present the results of U-Th dating of calcite veins in the Loma Blanca normal fault zone, Rio Grande rift, New Mexico, United States, that constrain earthquake recurrence intervals over much of the past ˜550 ka—the longest direct record of seismic frequency documented for any fault to date. The 13 distinct seismic events delineated by this effort demonstrate that for >400 ka, the Loma Blanca fault produced periodic large earthquakes, consistent with a time-dependent model of earthquake recurrence. However, this time-dependent series was interrupted by a cluster of earthquakes at ˜430 ka. The carbon isotope composition of calcite formed during this seismic cluster records rapid degassing of CO2, suggesting an interval of anomalous fluid source. In concert with U-Th dates recording decreased recurrence intervals, we infer seismicity during this interval records fault-valve behavior. These data provide insight into the long-term seismic behavior of the Loma Blanca fault and, by inference, other intraplate faults.
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Serum dioxin and psychological functioning in U.S. Air Force veterans of the Vietnam War.
Michalek, Joel E; Barrett, Drue H; Morris, Robert D; Jackson, William G
2003-02-01
Using the Minnesota Multiphasic Personality Inventory and the Millon Clinical Multiaxial Inventory, we assessed the psychological functioning of U.S. Air Force veterans exposed to Agent Orange and its contaminant, 2,3,7,8-tetrachlodibenzo-p-dioxin (dioxin), during the Vietnam War. Index subjects were veterans of Operation Ranch Hand (N = 1,109). Comparisons (N = 1,493) were U.S. Air Force veterans not involved with spraying herbicides. We found few consistent psychological abnormalities associated with serum dioxin levels. Ranch Hand veterans with higher dioxin levels showed some difficulties in anxiety, somatization, depression, and a denial of psychological factors. However, those with background levels also showed indications of emotional distress, primarily in emotional numbing and lability; a guarded, suspicious, and withdrawn style of relating to others; and unusual thoughts or behaviors.
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Economic analysis of anaerobic digestion - A case of Green power biogas plant in The Netherlands
Gebrezgabher, S.A.; Meuwissen, M.P.M.; Prins, B.A.M.; Oude Lansink, A.G.J.M.
2009-01-01
Finance - Lending - Borrowing Argentine Commercial Farm/Ranch Management Information Systems: Design, Capabilities, Costsand Benefits David Hughes, CEO, Francisco Abello, CFO, James McGrann, Partner, Ag Management Group &Traulen Company. Argentina and United States. Benchmarking Recommendations
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Traditional uses of indigenous tree species
African Journals Online (AJOL)
Mo
Cordia millenii, Ficus spp, Markhamia lutea and Albizia spp are the most commonly used indigenous ... activities like construction of roads and expansion of ranches and ... impact of traditional uses of indigenous tress on the sustainability.
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Phlebotomine Vectors of Human Disease.
1983-12-30
1940. El cultivo de Bartonella bacilliformis de un caso de verruga en Ecuador. Bol. of. San. Panam. 19:756-758. Leon, L.A. 1957. Leishmanias y...Alexander, C.P. 1944. Two undescribed psychodid Diptera from tropical America. Rev. Entomol. 15:313-317. Blancas, F., and A. Herrer. 1959-1960. Estudios
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Evolution and outburst risk analysis of moraine-dammed lakes in the ...
Indian Academy of Sciences (India)
negative mass balance but is consistent with the rapid expansion of the ... nities and cities, resulting in great loss of life and the ... Cascades, western North America; the Cordillera. Blanca, Peru; central Asia; and the central and ... loss of life and property downstream. ..... This work was funded by National Social Sci-.
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Vesícula hipotónica asociada a hipoclorhidria gástrica
Directory of Open Access Journals (Sweden)
Alfonso Bonilla Naar
1945-05-01
Full Text Available Nombre: N. N. Edad, 38 años. Natural de Manizales, Palmira y Manizales, lugares donde ha residido. Palmira, 12 años. Viene de allá. HAy paludismo, Pararasitismo intestinal. Profesión: Comerciante. Negocio en arroz. No vive en arrozales. Estado civil: Casado Raza Blanca.
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Geomorphologic impacts of the glacial lake outburst flood from Lake No. 513 (Peru)
Czech Academy of Sciences Publication Activity Database
Vilímek, V.; Klimeš, Jan; Emmer, A.; Benešová, M.
2015-01-01
Roč. 73, č. 9 (2015), s. 5233-5244 ISSN 1866-6280 R&D Projects: GA ČR(CZ) GAP209/11/1000 Institutional support: RVO:67985891 Keywords : GLOF * debris flow * natural hazard * deglaciation * Cordillera Blanca * Peru Subject RIV: DE - Earth Magnetism, Geodesy, Geography Impact factor: 1.765, year: 2014
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Relationships between Nitrate and Oxygen Supply in Symbiotic Nitrogen Fixation by White Clover
DEFF Research Database (Denmark)
Minchin, F. R.; Ines Minguez, M.; Sheedy, J. E.
1986-01-01
Exposure of mature, nodulated plants of white clover (Trifolium repens) cv. Blanca to 330 mg dm−3 NO3-N for 8 d caused nitrogenase activity per plant to decrease by 80%. Total nodulated root respiration was not significantly affected but analysis of its components showed an 81% decrease in nitrog...
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La evolución del turismo en España: el ejemplo de Benidorm (Alicante)
Espinosa Seguí, Ana
2013-01-01
La historia del turismo de sol y playa masivo en España puede ser analizada teniendo en cuenta el caso de la ciudad de Benidorm. En esta presentación se va a realizar un breve recorrido evolutivo por esta ciudad alicantina, capital turística de la Costa Blanca.
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2012-12-21
...-specific science, a variety of assessment and control tools may be used with the aid of partners to reduce... contact station and gift shop at Refuge Headquarters, and a seasonal contact station at the P Ranch Unit...
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Hypertension and 2,3,7,8-Tetrachlorodibenzo-p-dioxin in Air Force Veterans of the Vietnam War
National Research Council Canada - National Science Library
Dwyer, James H; Jackson, William G; Michalek, Joel E
2006-01-01
.... We included a Comparison group of other Air Force veterans who flew or serviced C-130 cargo aircraft in Southeast Asia during the same calendar period that the Ranch Hand unit was active in Vietnam (1962-1971...
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Directory of Open Access Journals (Sweden)
Francisco Rodríguez-Barrientos
2014-05-01
Full Text Available El presente artículo se deriva del proyecto de investigación “Mejora en la eficiencia de la cadena productiva de la yuca en el distrito de La Fortuna, San Carlos, Costa Rica”. Su objetivo fundamental consistía en mejorar la eficiencia y la productividad en las diversas etapas del proceso agroproductivo de la yuca. La investigación se realizó en una franja territorial que abarcó un sector del distrito de La Fortuna, cantón de San Carlos, provincia de Alajuela, Costa Rica, tradicionalmente un importante lugar de producción yuquera, y otro del distrito de Peñas Blancas (cantón de San Ramón, provincia de Alajuela. Esa franja territorial es parte de la Región Huetar Norte costarricense y su sector ligado a la producción, procesamiento y comercialización de yuca constituyó la población meta de la investigación. El proyecto tuvo una duración de tres años (2006-2008. En este artículo se hace una caracterización histórica, social y económica de dicha franja territorial. Además, se analizan las consecuencias económicas y sociales, tanto para las comunidades ubicadas en la franja territorial estudiada como para la región de la que forman parte, derivadas de los cambios ocurridos en los ámbitos nacional e internacional, sobre todo en los últimos treinta años. De este modo, se intenta perfilar el alcance y la índole de las eventuales transformaciones acaecidas en la franja seleccionada, ubicando siempre el análisis en el contexto de la región Huetar Norte. Posteriormente se publicarán más artículos con los resultados obtenidos en las etapas agrícola, industrial (maquiladoras y empacadoras y social, destacando lo relacionado con la situación de los trabajadores en las empacadoras, haciendo énfasis en los migrantes nicaragüenses.
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Life-Cycle Cost Study for a Low-Level Radioactive Waste Disposal Facility in Texas
International Nuclear Information System (INIS)
Rogers, B.C.; Walter, P.L.; Baird, R.D.
1999-01-01
This report documents the life-cycle cost estimates for a proposed low-level radioactive waste disposal facility near Sierra Blanca, Texas. The work was requested by the Texas Low-Level Radioactive Waste Disposal Authority and performed by the National Low-Level Waste Management Program with the assistance of Rogers and Associates Engineering Corporation
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Structural entities of an ontology-driven unifying metamodel for UML, EER, and ORM2
CSIR Research Space (South Africa)
Keet, CM
2013-09-01
Full Text Available , keet@ukzn.ac.za 2 Departamento de Ciencias e Ingenier´ıa de la Computacio´n, Universidad Nacional del Sur, Bah´ıa Blanca, Argentina, prf@cs.uns.edu.ar 3Comisio´n de Investigaciones Cient´ıficas, Provincia de Buenos Aires, Argentina Abstract. Software...
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Directory of Open Access Journals (Sweden)
Stylianos Chatzimanolis
2014-02-01
Full Text Available A species of xanthopygine rove beetles is described and figured here as Darwinilus sedarisi gen. n. and sp. n. The holotype was collected by Charles Darwin in Bahía Blanca, Argentina on the Beagle’s voyage. The contributions of Charles Darwin to rove beetle systematics are summarized briefly.
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eLearning--Theories, Design, Software and Applications
Ghislandi, Patrizia, Ed.
2012-01-01
Chapters in this book include: (1) New e-Learning Environments: e-Merging Networks in the Relational Society (Blanca C. Garcia); (2) Knowledge Building in E-Learning (Xinyu Zhang and Lu Yuhao); (3) E-Learning and Desired Learning Outcomes (Ralph Palliam); (4) Innovative E-Learning Solutions and Environments for Small and Medium Sized Companies…
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Birds - Spears and Didion Ranches [ds315
California Natural Resource Agency — These data are summary statistics of abundances of birds counted within 100-m radius circles with 10-minute point counts at 15 sample points within Spears and Didion...
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Snags - Spears and Didion Ranches [ds317
California Natural Resource Agency — These data are the characteristics of the individual snags (standing dead trees) found at 15 sample points with three 0.05-ha circular plot habitat samples taken in...
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Rails - Spears and Didion Ranches [ds310
California Natural Resource Agency — These data are the detections of Virginia rail (Rallus limicola), Sora (Porzana carolina), and California black rail (Laterallus jamaicensis) from 13 survey points...
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Directory of Open Access Journals (Sweden)
Márcia F. Nogueira
Full Text Available ABSTRACT: The working equid population in Corumbá, Southern Pantanal, is very large and has a crucial role in the main economic activity of the State of Mato Grosso do Sul, the beef cattle industry. The aim of the present study was to estimate the prevalence of equine infectious anaemia (EIA in working equids of ranches in the municipality of Corumbá, by the official agar gel immunodiffusion (AGID test, and evaluate the adoption of the Programme for the Prevention and Control of Equine Infectious Anaemia proposed by Embrapa Pantanal and official entities in the 1990s. From September to November 2009, forty ranches distributed through the area of the municipality were visited, and serum samples were obtained from 721 equines and 232 mules. According to previous publications and the present data, it was concluded that the prevalence of EIA in this population has increased from 18.17% to 38.60%, which represents at this time approximately 13,000 infected animals. There was no significant difference between the apparent prevalence of equines and mules. It was also verified that the control programme was not known by the greater part of the interviewed ranch owners, managers and foremen and, in their perception, EIA is not a primary threat to address. Among the studied variables, the serologic testing practice significantly reduced the risk for the presence of EIA seropositivity, as well as the separation of riding equipment and segregation of seropositives.
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Directory of Open Access Journals (Sweden)
Nathan F. Sayre
2012-12-01
Full Text Available Discussions of diversified farming systems (DFS rarely mention rangelands: the grasslands, shrublands, and savannas that make up roughly one-third of Earth's ice-free terrestrial area, including some 312 million ha of the United States. Although ranching has been criticized by environmentalists for decades, it is probably the most ecologically sustainable segment of the U.S. meat industry, and it exemplifies many of the defining characteristics of DFS: it relies on the functional diversity of natural ecological processes of plant and animal (reproduction at multiple scales, based on ecosystem services generated and regenerated on site rather than imported, often nonrenewable, inputs. Rangelands also provide other ecosystem services, including watershed, wildlife habitat, recreation, and tourism. Even where non-native or invasive plants have encroached on or replaced native species, rangelands retain unusually high levels of plant diversity compared with croplands or plantation forests. Innovations in management, marketing, incentives, and easement programs that augment ranch income, creative land tenure arrangements, and collaborations among ranchers all support diversification. Some obstacles include rapid landownership turnover, lack of accessible U.S. Department of Agriculture certified processing facilities, tenure uncertainty, fragmentation of rangelands, and low and variable income, especially relative to land costs. Taking advantage of rancher knowledge and stewardship, and aligning incentives with production of diverse goods and services, will support the sustainability of ranching and its associated public benefits. The creation of positive feedbacks between economic and ecological diversity should be the ultimate goal.
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the occurrence of post partum anoestrus in bonsmara cows
African Journals Online (AJOL)
duration of post partum anoestrus than gain in body mass. Post pactum ... and Bos Taurus cattle to improve fertility and milk pro- duction in high .... The occurrence of post partum anoestrus in beef cows under ranching conditions. Proc.
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Reframing Financial Sector Identity: Options For Reducing Mexican Drug Cartel Economic Power
2012-01-18
gas stations, hotels, clothing stores, self-service stores, cellular telephone retailers, transnational franchises , night clubs, discotheques, car...dealers, auto repair shops, restaurants , real estate for land, ranches, and farms, as well as financial investments. . . . 7 Each of these issues
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Excessive deforestation of Gishwati Mountainous forest ...
International Development Research Centre (IDRC) Digital Library (Canada)
of the P-GIS approach to improve natural ... ict4d article. Participatory Geographic Information Systems (P-GIS) for ... scale cattle ranching projects, particularly cattle grazing within the ... maps for the year 1988 and 2006 were made and the.
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Glacier-related landforms and glacial lakes in Huascarán National Park, Peru
Czech Academy of Sciences Publication Activity Database
Vilímek, V.; Klimeš, Jan; Červená, L.
2016-01-01
Roč. 12, č. 1 (2016), s. 193-202 ISSN 1744-5647 R&D Projects: GA ČR(CZ) GAP209/11/1000 Institutional support: RVO:67985891 Keywords : moraines * rock glaciers * glacial lakes * Cordillera Blanca * Huascarán National Park * Peru Subject RIV: DE - Earth Magnetism, Geodesy, Geography Impact factor: 2.174, year: 2016
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Directory of Open Access Journals (Sweden)
CLAUDIA LORENA CERÓN FERNANDEZ
2016-11-01
Full Text Available Quinoa (Chenopodium quinoa WILLD is a pseudocereal produced for many years in Andean regions and allows different transformations taking advantage of their nutritional qualities becoming it a food agribusiness alternative. Objective of this study was to observe physical and chemical changes from two quinoa flour varieties (Blanca dulce de Jericó and Tunkahuan during extrusion process and determine conditions (flour moisture, temperature and screw speed that allow obtain an extruded similar to precooked functional properties. Water absorption index (IAA, water solubility index (ISA and swelling power (PH was response variables. Two flour extrusion at 105°C degrees, 150 rpm screw speed and 25 to 30% moisture improved functional properties (IAA increased from 1,81 g gel/g D.M to 4,22 g gel/g D.M in Tunkahuan extruded quinoa flour and 2,00 g gel/g to 4,27 g gel MS/MS g flour in Blanca dulce de Jericó but nutriotional properties decreased as digestibility except for a carbohydrate content increase.
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Directory of Open Access Journals (Sweden)
G. Benedetti
2007-01-01
Full Text Available El presente trabajo tiene como objetivo realizar un diagnóstico ambiental de un sector de la ciudad de Bahía Blanca, Argentina basado en el arbolado urbano de alineación. El arbolado constituye un componente fundamental de los paisajes artifi ciales ya que contribuye al aumento del confort y al mejoramiento de la calidad del medio. En este sentido, actúa como un factor moderador de las condiciones climáticas, la contaminación y la salud de la población. El municipio de la ciudad de Bahía Blanca tiene como proyecto la realización de inventarios del arbolado en los distintos barrios, para lograr optimizar la relación entre la cantidad de ejemplares arbóreos y la densidad poblacional. Es importante considerar la variedad de ejemplares en función del uso del suelo y de las características ambientales de cada sector. Por lo tanto, este trabajo presenta un diseño metodológico para la elaboración del plano verde de la ciudad.
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Directory of Open Access Journals (Sweden)
Flor Urcia A
Full Text Available El objetivo del presente estudio fue demostrar la eficacia de los extractos de diferentes variedades de papa como ingredientes del medio de cultivo para la identificación del Trichophyton rubrum y proponer su empleo en el diagnóstico de dermatomicosis. Se utilizaron las infusiones naturales de las variedades Solanum tuberosum (papa blanca, Solanum chaucha (papa huayro y Solanum goniocalyx (papa amarilla, para preparar los medios de cultivo análogos al estándar de formulación comercial Agar Papa Dextrosa (APDc. Las cepas de T. rubrum fueron inoculadas en los diferentes medios de cultivo, incubados a 2°C durante 10 días. Para la evaluación consideramos características culturales y microscópicas. Los resultados muestran que el medio de cultivo Agar Papa Huayro Dextrosa (APHD fue más eficiente en la producción del pigmento rojo vino, pero se obtuvo mayor esporulación en los medios de cultivo Agar Papa Blanca Dextrosa (APBD y Agar Papa Amarilla Dextrosa (APAD.
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7 CFR 3430.604 - Project types and priorities.
2010-01-01
... markets. (10) Conservation assistance. (11) Risk management education. (12) Diversification and marketing... and ranchers. (4) Innovative farm and ranch transfer strategies. (5) Entrepreneurship and business training. (6) Model land leasing contracts. (7) Financial management training. (8) Whole farm planning. (9...
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XI Jornades d’Educació Emocional. Educació emocional i família
Barredo Gutiérrez, Blanca; Bisquerra Alzina, Rafael; Blanco Cuch, Aida; Giner, Antoni; Pérez Escoda, Núria; Tey, Amèlia
2014-01-01
Barredo Gutiérrez, Blanca; Bizquerra Alzina, Rafel; García Aguilar, Núria; Giner Tarrida, Antoni; Pérez Escoda, Núria; Tey Teijón, Amelia (Coords.). XI Jornades d’Educació Emocional/XI Jornadas de Educación Emocional. Barcelona, Universitat de Barcelona (Institut de Ciències de l’Educació), 2015. Document electrònic.
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Journal of Genetics | Indian Academy of Sciences
Indian Academy of Sciences (India)
Home; Journals; Journal of Genetics. María Teresa Magaña-Torres. Articles written in Journal of Genetics. Volume 90 Online resources 2011 pp e114-e119. Polymorphisms of seven genes involved in lipid metabolism in an unselected Mexican population · Blanca E. Ríos-González Karla E. Luévano-Ortega Ana M.
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Las Matemáticas en Educación Infantil: sentidos y creatividad
GdI Educación Personalizada en la Era Digital, EPEDIG
2016-01-01
El Seminario de Educación Personalizada (SIEP) -actividad organizada por el Grupo de Investigación EDUC-04 EPEDIG de UNIRResearch-, tuvo el honor de recibir el pasado 18 de Abril a los Doctores Blanca Arteaga y Jesús Macías. Ambos son expertos en enseñar matemáticas de una forma diferente.
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Directory of Open Access Journals (Sweden)
Ilena Zanella
2012-11-01
Full Text Available Doce especies de tiburones habitan las aguas del Parque Nacional Isla del Coco (PNIC y uno de los más abundantes es el tiburón punta blanca de arrecife, Triaenodon obesus. El presente estudio determinó la abundancia, tallas y estructura de la población de esta especie en la zona de Bahía Chatham, PNIC. Se utilizó el método de marcaje y recaptura y se realizaron conteos subacuáticos visuales, con el fin de determinar su abundancia relativa y contabilizar recapturas visuales. Los tiburones punta blanca de Bahía Chatham no presentan segregación ontogénica espacial definida; pero si una alta fidelidad a los a sitios de residencia dentro de esta bahía. La longitud total promedio de los tiburones marcados fue de 101.8±12.1cm, con una longitud total máxima de 130.0cm y una mínima de 71.0cm. La mediana de las longitudes totales de los tiburones machos (103.5±21.33cm y hembras (100.1±11.2cm no difirieron significativamente (H = 1.78; p=0.1818. La abundancia relativa en Bahía Chatham, PNIC fue de 49.5±10.4 tiburones/h. El tamaño estimado de la población usando el método de de captura-recaptura fue de 408 (IC=181-1050.Approximately 12 species of shark inhabit at Coco Island National Park (PNIC; some are migratory, such as the hammerhead shark (Sphyrna lewini and whale shark (Rincodon typus, and others are resident, like the whitetip shark (Triaenodon obesus. The whitetip shark is a species related to coral reefs, it inhabits coastal environments and is nocturnal and, it is very common in tropical waters, but there are few studies worldwide. In fact, only short researches have been done about their behavior at PNIC. Therefore, this study aimed to give data about the abundance, size and population structure of the whitetip shark at Chatham Bay in Coco Island National Park, providing baseline information for monitoring its population which is also very vulnerable to climate change. In order to accomplish this aim, a mark-recapture method
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2010-05-20
...., Worldwide Services Group, Global Support Services (GSS) Organization, Including On-Site Leased Workers From..., Highlands Ranch, CO; Including Employees in Support of Avaya Inc., Worldwide Services Group, Global Support... workers of Avaya Inc., Worldwide Services Group, Global Support Services (GSS) Organization, including on...
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2011-04-22
... has represented a specific category related to farming or ranching, food production and processing... D. Plant Commodity Producer Category E. National Aquaculture Association Category H. National Food... with a historic commitment to research in the food and agricultural sciences, food retailing and...
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76 FR 15455 - Identification of Non-Hazardous Secondary Materials That Are Solid Waste
2011-03-21
...* Industrial Boilers: Crop Production 111 Food Manufacturing........ 311, 312, Cattle Ranching and Farming 1121 Pulp and Paper Mills...... 3221 Hog and Pig Farming 1122 Petroleum Refining........ 32411 Poultry and Egg Production 1123 Chemical Manufacturing.... 325 Sheep and Goat Farming 1124 Primary Metal 331...
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Influence of land use on phytomass accumulation in Highland ...
African Journals Online (AJOL)
Transformation of indigenous vegetation for production purposes impacts negatively on biodiversity but does this necessarily equate with a decrease in phytomass accumulation, which may influence carbon sequestration? Phytomass accumulation was studied for common land covers of beef ranching or dairy farming ...
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Geohydrology and evapotranspiration at Franklin Lake Playa, Inyo County, California
Energy Technology Data Exchange (ETDEWEB)
NONE
1990-12-01
Franklin Lake playa is one of the principal discharge areas of the Furnace Creek Ranch-Alkali Flat ground-water-flow system in southern Nevada and adjacent California. Yucca Mountain, Nevada, located within this flow system, is being evaluated by the US Department of Energy to determine its suitability as a potential site for a high-level nuclear-waste repository. To assist the US Department of Energy with its evaluation of the Yucca Mountain site, the US Geological Survey developed a parameter-estimation model of the Furnace Creek Ranch-Alkali Flat ground-water-flow system. Results from sensitivity analyses made using the parameter-estimation model indicated that simulated rates of evapotranspiration at Franklin Lake playa had the largest effect on the calculation of transmissivity values at Yucca Mountain of all the model-boundary conditions and, therefore, that evapotranspiration required careful definition. 72 refs., 59 figs., 26 tab.
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Geohydrology and evapotranspiration at Franklin Lake Playa, Inyo County, California
International Nuclear Information System (INIS)
1990-01-01
Franklin Lake playa is one of the principal discharge areas of the Furnace Creek Ranch-Alkali Flat ground-water-flow system in southern Nevada and adjacent California. Yucca Mountain, Nevada, located within this flow system, is being evaluated by the US Department of Energy to determine its suitability as a potential site for a high-level nuclear-waste repository. To assist the US Department of Energy with its evaluation of the Yucca Mountain site, the US Geological Survey developed a parameter-estimation model of the Furnace Creek Ranch-Alkali Flat ground-water-flow system. Results from sensitivity analyses made using the parameter-estimation model indicated that simulated rates of evapotranspiration at Franklin Lake playa had the largest effect on the calculation of transmissivity values at Yucca Mountain of all the model-boundary conditions and, therefore, that evapotranspiration required careful definition. 72 refs., 59 figs., 26 tab
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Bear Creek Project. Draft environmental statement
International Nuclear Information System (INIS)
1977-01-01
The Bear Creek Project consists of mining and milling operations involving uranium ore deposits located in Converse County, Wyoming. Mining of uranium from six known ore bodies will take place over ten years; a 1000 tons ore/day will be constructed and operated as long as ore is available. The tailings will be stored onsite in an impoundment. The project would convert 2700 acres from grazing use to mining/milling activities for about ten years. Mining would disturb a total of 1600 acres but, because of reclamation, the max acreage disturbed at any one time would be about 1000 acres, the average being about 650 acres. Dose rates were computed for an individual in a ranch house at the nearest ranch. Conditions for the protection of the environment are proposed. Possible environmental impacts evaluated cover air, land, water, soil, vegetation, wildlife, and community. A benefit-cost analysis is made
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Directory of Open Access Journals (Sweden)
Olaotswe Kgosikoma
2012-12-01
Full Text Available We investigated vegetation dynamics in relation to livestock grazing as perceived by pastoral farmers in different regions of Botswana. A structured questionnaire was used to collect farmers' understanding of vegetation changes and causes within three different grazing lands. The pastoral farmers' description of dominant vegetation differed significantly both at the local and district level, which suggests that rangelands consist of patches dominated by different grasses and woody vegetation. Most pastoralists indicated that grass composition has undergone changes, and unpalatable grasses such as Aristida congesta and Megaloprotachne albescens are increasing. The different factors perceived by pastoral farmers to cause changes in vegetation composition included rainfall, overgrazing, and fire. Bush encroachment is considered to be more common in communal grazing land than in ranches. According to pastoral farmers, the ranching system is less degrading to the environment and more sustainable for livestock production than is communal grazing.
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Directory of Open Access Journals (Sweden)
Yacenia Morillo Coronado
2010-01-01
Full Text Available Se utilizaron 19 marcadores microsatélites para caracterizar 34 accesiones de naranja Citrus sinensis L. Osbeck del Banco de Germoplasma de la Corporación Colombiana de Investigación Agropecuaria (Corpoica-Palmira. Seis marcadores fueron polimórficos, los de mayor heterocigosidad fueron CCSM- 19 (0.4097 y CCSM-3 (0.3254. Se diferenciaron 33 accesiones y al 85% de similitud, con el índice de Nei-Li y el método de agrupamiento UPGMA, se conformaron cuatro grupos. En el primero se situaron dos accesiones blancas (Lerma y Valencia Olinda 2, en el segundo la mayoría de las blancas (Indian River, Valencia Olinda, Wialua, Lima Dulce, Pera del Río, St. Michael, Enterprise, Cafetera No. 1 junto con García Valencia y Navel (Lane Late, Valle Washington, New Hall y dos sanguinas (Rudy Blood, Moro Blood, en el tercero accesiones blancas (Joppa, Salerma, Cuban Queen, Rico, Galicia, Star Calyx, Valencia Cutter, Valencia Frost, Valencia Campbell y Valencia Variegado y una sola accesión sanguina (Morocco Blood. En el cuarto grupo se situaron dos accesiones blancas, (Jaffa y Valencia 1-D-E. Finalmente, la variedad Sanguinella no hizo parte de grupos. Con los marcadores microsatélites no se encontró relación entre los grupos genéticos, formación y las características morfológicas del grupo.To characterize 34 orange accessions Citrus sinensis L. Osbeck from the Germplasm bank Corpoica- Palmira, 19 microsatellite markers were used. Six markers were polymorphic; the highest heterozygosity was obtained by CCSM-19 (0.4097 and CCSM-3 (0.3254. Thirty-three accessions were differentiated; with 85% of similarity, Nei-Li´s index and the UPGMA clustering method were formed fi ve groups. In the first one, two accessions were white (Lerma and Valencia Olinda 2, in the second one most of the white (Indian River, Valencia Olinda, Wialua, Lima Dulce, Pera del Río, St. Michael, Enterprise, Cafetera No. 1, García Valencia and Navel (Lane Late, Valle Washington
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Mobile Monitoring of Methane During and After the Aliso Canyon Natural Gas Leak
Polidori, A.; Pikelnaya, O.; Low, J.; Wimmer, R.; Zhou, Q.
2016-12-01
The Aliso Canyon gas leak was discovered inside the SoCalGas (SCG) facility on October 23, 2015. This incident represented the worst natural gas leak in the US history, and spurred a number of odor nuisance complaints from local residents. The community of Porter Ranch, located directly south of the SCG Aliso Canyon facility, was the most affected by the leak although complaints have been also reported in other neighboring communities of the San Fernando Valley. Therefore, monitoring of air quality was and remains crucial for measuring the impact of methane emissions from this leak and assessing the well-being of all residents. As the main local air quality agency for this area, South Coast Air Quality Management District (SCAQMD) organized a set of monitoring activities in response to the leak. Since December 21, 2015 SCAQMD has been conducting mobile survey measurements in and around Porter Ranch to characterize methane levels and concentration gradients within the community. For this purpose, a fast-response optical methane analyzer (LI-COR 7700) and a Global Positioning System (GPS) were mounted on top of a hybrid vehicle and driven around Porter Ranch and other surrounding areas. Following the permanent seal of the leaking well on February 18, 2016 mobile measurements have also been expanded to inside the Aliso Canyon SCG facility. During this presentation we will describe the experimental setup designed for mobile methane surveys and the monitoring strategy used for this study. We will discuss the main results of our mobile measurements including long-term methane trends since the end of the leak.
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30 CFR Appendix to Part 253 - List of U.S. Geological Survey Topographic Maps
2010-07-01
... Comal; La Leona; La Parra Ranch NE; Laguna Vista; Lake Austin; Lake Como; Lake Stephenson; Lamar; Long... Canyon; Encinitas; Gaviota; Goleta; Guadalupe; Imperial Beach; Laguna Beach; La Jolla; Las Pulgas Canyon... SE; Steinhatchee SW; Sugar Hill; Sumner; Suwannee; Tampa; Tarpon Springs; Valparaiso; Venice; Vista...
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2012-01-27
... Street, Suite 100, Sacramento, CA 95816-7100. Lloyd Mathiesen or Representative, Chicken Ranch Rancheria..., Buena Vista Rancheria, P.O. Box 162283, Sacramento, CA 95816. Silvia Burley or Representative... Representative, Central Sierra Me-Wuk Cultural and Historic Preservation Committee, P.O. Box 699, Tuolumne, CA...
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We aimed to determine the seroprevalence of infection with N. caninum, Leptospira, and bovine herpesvirus type 1 and risk factors associated with these infections in water buffaloes in Veracruz State, Mexico. Through a cross-sectional study, 144 water buffaloes (Bubalus bubalis) raised in 5 ranches ...
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2010-11-08
... Secretary of Agriculture to a specific category on the Board, including farming or ranching, food production... follows: Category F. ``National Food Animal Science Society,'' Nancy M. Cox, Director, Kentucky... composed of 25 members, each representing a specific category related to agriculture. The Board was first...
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South African Journal of Agricultural Extension - Vol 42, No 2 (2014)
African Journals Online (AJOL)
Factors cost effectively improved using computer simulations of maize yields in semi-arid Sub-Saharan Africa · EMAIL FREE FULL TEXT EMAIL FREE FULL TEXT ... Towards assessing managerial competencies and leadership styles required for successful game ranch management in the Eastern Cape, South Africa ...
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2010-01-01
... Section 123.502 Business Credit and Assistance SMALL BUSINESS ADMINISTRATION DISASTER LOAN PROGRAM... conviction of a serious criminal offense; (d) Your business is an agricultural enterprise. Agricultural enterprise means a business primarily engaged in the production of food and fiber, ranching and raising of...
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Grass composition and rangeland condition of the major grazing ...
African Journals Online (AJOL)
One area represented lightly grazed government ranches or parks which were used as benchmarks, another area represented the seasonal grazing areas with an intermediate grazing pressure and the remaining were the heavily grazed roadsides, lakeshores and other communal grazing lands. The range condition ...
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Teaching "Real Utopias" through Experiential Learning
Peterson, Lindsey; Witt, Joseph; Huntington, Carolyn
2015-01-01
In this article, we describe a way to encourage students to envision "real utopias" through the Global Village experience at the Heifer Ranch in Arkansas. The Global Village experience introduces participants to issues associated with global hunger, poverty, environmental sustainability, and resource consumption and provides…
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Pena Blanca Natural Analogue Project: Summary of activities
International Nuclear Information System (INIS)
Levy, S.; Goldstein, S.; Dobson, P.F.; Goodell, P.; Ku, T.-L.; Abdel-Fattah, A.; Saulnier, G.; Fayek, M.; de la Garza, R.
2011-01-01
The inactive Nopal I uranium mine in silicic tuff north of Chihuahua City, Chihuahua, Mexico, was studied as a natural analogue for an underground nuclear-waste repository in the unsaturated zone. Site stratigraphy was confirmed from new drill cores. Data from site studies include chemical and isotopic compositions of saturated- and unsaturated-zone waters. A partial geochronology of uranium enrichment and mineralization was established. Evidence pertinent to uranium-series transport in the soil zone and changing redox conditions was collected. The investigations contributed to preliminary, scoping-level performance assessment modeling.